A light tube for illumination by a power supply circuit includes a bulb portion and at least one end cap disposed on the bulb portion. A plurality of light emitting diodes is disposed inside the bulb portion for illuminating in response to electrical current to be received from the power supply circuit. The light emitting diodes are arranged in spaced-apart groupings.

Patent
   8716945
Priority
Feb 11 2000
Filed
Feb 26 2013
Issued
May 06 2014
Expiry
Feb 12 2021

TERM.DISCL.
Assg.orig
Entity
unknown
0
605
EXPIRED
18. A lighting device connectable to a socket of a light fixture, comprising:
a housing having a first end and a second end, wherein at least a portion of the housing is light-transmissive;
an end cap disposed on one of the first end or the second end of the housing and configured to fit with the socket; and
a plurality of light emitting diodes disposed inside and extending between the first and second ends of the housing, wherein the plurality of light emitting diodes is arranged to provide light through at least a portion of the light-transmissive portion of the housing;
a pulse width modulation circuit configured to receive power from a power source; and
a current limiting circuit comprising an inductive element coupled between the pulse width modulation circuit and at least some of the plurality of light emitting diodes.
1. A lighting device connectable to a socket of a light fixture, comprising:
a housing having a first end and a second end, wherein at least a portion of the housing is transparent or translucent;
an end cap disposed on one of the first end or the second end of the housing and configured to fit with the socket; and
a plurality of light emitting diodes disposed inside and extending between the first and second ends of the housing, wherein the plurality of light emitting diodes is arranged to provide light through at least a portion of the transparent or translucent portion of the housing; wherein
a power source is electrically connected to and configured to provide power to the plurality of light emitting diodes through a pulse width modulation circuit and a current limiting circuit, the current limiting circuit comprising an inductive element coupled between the pulse width modulation circuit and at least some of the plurality of light emitting diodes.
2. The lighting device of claim 1 wherein the end cap is a first end cap disposed on the first end of the housing, the housing comprises an elongate tube and the light fixture is a fluorescent light fixture, the lighting device further comprising:
a second end cap disposed on the second end of the housing, the second end cap configured to fit with the socket.
3. The lighting device of claim 2 wherein the first end cap and the second end cap comprise a respective pair of electrical bi-pin connectors.
4. The lighting device of claim 1 wherein the current limiting circuit is a switching power supply type current limiter.
5. The lighting device of claim 1 wherein the pulse width modulation circuit and the current limiting circuit are packaged inside the housing.
6. The lighting device of claim 1 wherein the pulse width modulation circuit and the current limiting circuit are packaged inside the socket.
7. The lighting device of claim 1 wherein the power source is an AC power source or a DC power source and a rectifier is electrically connected to the AC power source to receive AC input and electrically connected to the pulse width modulation circuit to provide DC output to the pulse width modulation circuit when the power source is the AC power source.
8. The lighting device of claim 7 wherein the rectifier receives the AC input from a conventional fluorescent ballast electrically connected to the AC power source.
9. The lighting device of claim 7 wherein the power source is a DC power source in the form of a battery, the battery providing the DC output to the pulse width modulation circuit.
10. The lighting device of claim 1 wherein the pulse width modulation circuit is configured to switch DC power to the plurality of light emitting diodes on and off at a frequency that causes the light emitted from the plurality of light emitting diodes to appear, when viewed by a human eye, to shine continuously.
11. The lighting device of claim 1 wherein the pulse width modulation circuit modulates a frequency of light emitted from the plurality of light emitting diodes above a nominal variation of 120 to 100 Hz.
12. The lighting device of claim 1 wherein the pulse width modulation circuit modulates a frequency of light emitted from the plurality of light emitting diodes to provide a visible on and off cycle.
13. The lighting device of claim 1 wherein the end cap is coupled to the power source through a magnetic link.
14. The lighting device of claim 13 wherein the magnetic link comprises an inductive transmitter and an inductive receiver.
15. The lighting device of claim 1, further comprising:
a circuit board mounted within the housing, and wherein the light emitting diodes are arranged such that the radiation pattern of light emitted therefrom is centered at a 90° angle relative to the circuit board.
16. The lighting device of claim 15 wherein the plurality of light emitting diodes are mounted on only one side of the circuit board.
17. The lighting device of claim 15 wherein the circuit board has an H-shaped cross-section when viewed from the first end of the housing.
19. The lighting device of claim 18 wherein the end cap is a first end cap disposed on the first end of the housing, the housing comprises an elongate tube and the light fixture is a fluorescent light fixture, the lighting device further comprising:
a second end cap disposed on the second end of the housing, the second end cap configured to fit with the socket, wherein the first end cap and the second end cap comprise a respective pair of electrical bi-pin connectors.
20. The lighting device of claim 18 wherein the pulse width modulation circuit and the current limiting circuit are packaged inside the housing.

This application is a continuation of U.S. patent application Ser. No. 12/965,019, filed Dec. 10, 2010 and issued as U.S. Pat. No. 8,382,327, which is a continuation of U.S. patent application Ser. No. 11/085,744, filed Mar. 21, 2005 and issued as U.S. Pat. No. 8,247,985 on Aug. 21, 2012, which is a continuation of U.S. patent application Ser. No. 09/782,375, filed Feb. 12, 2001 and issued as U.S. Pat. No. 7,049,761 on May 23, 2006, which claims the benefit of U.S. Provisional Application No. 60/181,744 filed Feb. 11, 2000.

The present invention relates to a light tube illuminated by LEDs (light emitting diodes) which are packaged inside the light tube and powered by a power supply circuit.

Conventional fluorescent lighting systems include fluorescent light tubes and ballasts. Such lighting systems are used in a variety of locations, such as buildings and transit buses, for a variety of lighting purposes, such as area lighting or backlighting. Although conventional fluorescent lighting systems have some advantages over known lighting options, such as incandescent lighting systems, conventional fluorescent light tubes and ballasts have several shortcomings. Conventional fluorescent light tubes have a short life expectancy, are prone to fail when subjected to excessive vibration, consume high amounts of power, require a high operating voltage, and include several electrical connections which reduce reliability. Conventional ballasts are highly prone to fail when subjected to excessive vibration. Accordingly, there is a desire to provide a light tube and power supply circuit which overcome the shortcomings of conventional fluorescent lighting systems. That is, there is a desire to provide a light tube and power supply circuit which have a long life expectancy, are resistant to vibration failure, consume low amounts of power, operate on a low voltage, and are highly reliable. It would also be desirable for such a light tube to mount within a conventional fluorescent light tube socket.

A light tube for illumination by a power supply circuit including a bulb portion and an end cap disposed at an end of the bulb portion. A plurality of light emitting diodes is disposed inside the bulb portion and illuminate in response to electrical current. The light emitting diodes are arranged in spaced-apart banks.

The description herein makes reference to the accompanying drawings wherein like reference numerals refer to like parts throughout the several views, and wherein:

FIG. 1 is a line drawing showing a light tube, in perspective view, which in accordance with the present invention is illuminated by LEDs packaged inside the light tube;

FIG. 2 is a perspective view of the LEDs mounted on a circuit board;

FIG. 3 is a cross-sectional view of FIG. 2 taken along lines 3-3;

FIG. 4 is a fragmentary, perspective view of one embodiment of the present invention showing one end of the light tube disconnected from one end of a light tube socket;

FIG. 5 is an electrical block diagram of a first power supply circuit for supplying power to the light tube;

FIG. 6 is an electrical schematic of a switching power supply type current limiter;

FIG. 7 is an electrical block diagram of a second power supply circuit for supplying power to the light tube;

FIG. 8 is an electrical block diagram of a third power supply circuit for supplying power to the light tube;

FIG. 9 is a fragmentary, perspective view of another embodiment of the present invention showing one end of the light tube disconnected from one end of the light tube socket; and

FIG. 10 is an electrical block diagram of a fourth power supply circuit for supplying power to the light tube.

FIG. 1 is a line drawing showing a light tube 20 in perspective view. In accordance with the present invention, the light tube 20 is illuminated by LEDs 22 packaged inside the light tube 20. The light tube 20 includes a cylindrically shaped bulb portion 24 having a pair of end caps 26 and 28 disposed at opposite ends of the bulb portion. Preferably, the bulb portion 24 is made from a transparent or translucent material such as glass, plastic, or the like. As such, the bulb material may be either clear or frosted.

In a preferred embodiment of the present invention, the light tube 20 has the same dimensions and end caps 26 and 28 (e.g. electrical male bi-pin connectors, type G13) as a conventional fluorescent light tube. As such, the present invention can be mounted in a conventional fluorescent light tube socket.

The line drawing of FIG. 1 also reveals the internal components of the light tube 20. The light tube 20 further includes a circuit board 30 with the LEDs 22 mounted thereon. The circuit board 30 and LEDs 22 are enclosed inside the bulb portion 24 and the end caps 26 and 28.

FIG. 2 is a perspective view of the LEDs 22 mounted on the circuit board 30. A group of LEDs 22, as shown in FIG. 2, is commonly referred to as a bank or array of LEDs. Within the scope of the present invention, the light tube 20 may include one or more banks or arrays of LEDs 22 mounted on one or more circuit boards 30. In a preferred embodiment of the present invention, the LEDs 22 emit white light and, thus, are commonly referred to in the art as white LEDs. In FIGS. 1 and 2, the LEDs 22 are mounted to one surface 32 of the circuit board 30. In a preferred embodiment of the present invention, the LEDs 22 are arranged to emit or shine white light through only one side of the bulb portion 24, thus directing the white light to a predetermined point of use. This arrangement reduces light losses due to imperfect reflection in a convention lighting fixture. In alternative embodiments of the present invention, LEDs 22 may also be mounted, in any combination, to the other surfaces 34, 36, and/or 38 of the circuit board 30.

FIG. 3 is a cross-sectional view of FIG. 2 taken along lines 3-3. To provide structural strength along the length of the light tube 20, the circuit board 30 is designed with a H-shaped cross-section. To produce a predetermined radiation pattern or dispersion of light from the light tube 20, each LED 22 is mounted at an angle relative to adjacent LEDs and/or the mounting surface 32. The total radiation pattern of light from the light tube 20 is effected by (1) the mounting angle of the LEDs 22 and (2) the radiation pattern of light from each LED. Currently, white LEDs having a viewing range between 6° and 45° are commercially available.

FIG. 4 is a fragmentary, perspective view of one embodiment of the present invention showing one end of the light tube 20 disconnected from one end of a light tube socket 40. Similar to conventional fluorescent lighting systems and in this embodiment of the present invention, the light tube socket 40 includes a pair of electrical female connectors 42 and the light tube 20 includes a pair of mating electrical male connectors 44.

Within the scope of the present invention, the light tube 20 may be powered by one of four power supply circuits 100, 200, 300, and 400. A first power supply circuit includes a power source and a conventional fluorescent ballast. A second power supply circuit includes a power source and a rectifier/filter circuit. A third power supply circuit includes a DC power source and a PWM (Pulse Width Modulation) circuit. A fourth power supply circuit powers the light tube 20 inductively.

FIG. 5 is an electrical block diagram of a first power supply circuit 100 for supplying power to the light tube 20. The first power supply circuit 100 is particularly adapted to operate within an existing, conventional fluorescent lighting system. As such, the first power supply circuit 100 includes a conventional fluorescent light tube socket 40 having two electrical female connectors 42 disposed at opposite ends of the socket. Accordingly, a light tube 20 particularly adapted for use with the first power supply circuit 100 includes two end caps 26 and 28, each end cap having the form of an electrical male connector 44 which mates with a corresponding electrical female connector 42 in the socket 40.

The first power supply circuit 100 also includes a power source 46 and a conventional magnetic or electronic fluorescent ballast 48. The power source 46 supplies power to the conventional fluorescent ballast 48.

The first power supply circuit 100 further includes a rectifier/filter circuit 50, a PWM circuit 52, and one or more current-limiting circuits 54. The rectifier/filter circuit 50, the PWM circuit 52, and the one or more current-limiting circuits 54 of the first power supply circuit 100 are packaged inside one of the two end caps 26 or 28 of the light tube 20.

The rectifier/filter circuit 50 receives AC power from the ballast 48 and converts the AC power to DC power. The PWM circuit 52 receives the DC power from the rectifier/filter circuit 50 and pulse-width modulates the DC power to the one or more current-limiting circuits 54. In a preferred embodiment of the present invention, the PWM circuit 52 receives the DC power from the rectifier/filter circuit 50 and cyclically switches the DC power on and off to the one or more current-limiting circuits 54. The DC power is switched on and off by the PWM circuit 52 at a frequency which causes the white light emitted from the LEDs 22 to appear, when viewed with a “naked” human eye, to shine continuously. The PWM duty cycle can be adjusted or varied by control circuitry (not shown) to maintain the power consumption of the LEDs 22 at safe levels.

The DC power is modulated for several reasons. First, the DC power is modulated to adjust the brightness or intensity of the white light emitted from the LEDs 22 and, in turn, adjust the brightness or intensity of the white light emitted from the light tube 20. Optionally, the brightness or intensity of the white light emitted from the light tube 20 may be adjusted by a user. Second, the DC power is modulated to improve the illumination efficiency of the light tube 20 by capitalizing upon a phenomenon in which short pulses of light at high brightness or intensity to appear brighter than a continuous, lower brightness or intensity of light having the same average power. Third, the DC power is modulated to regulate the intensity of light emitted from the light tube 20 to compensate for supply voltage fluctuations, ambient temperature changes, and other such factors that affect the intensity of white light emitted by the LEDs 22. Fourth, the DC power is modulated to raise the variations of the frequency of light above the nominal variation of 120 to 100 Hz thereby reducing illumination artifacts caused by low frequency light variations, including interactions with video screens. Fifth, the DC power may optionally be modulated to provide an alarm function wherein light from the light tube 20 cyclically flashes on and off.

The one or more current-limiting circuits 54 receive the pulse-width modulated or switched DC power from the PWM circuit 52 and transmit a regulated amount of power to one or more arrays of LEDs 22. Each current-limiting circuit 54 powers a bank of one or more white LEDs 22. If a bank of LEDs 22 consists of more than one LED, the LEDs are electrically connected in series in an anode to cathode arrangement. If brightness or intensity variation between the LEDs 22 can be tolerated, the LEDs can be electrically connected in parallel.

The one or more current-limiting circuits 54 may include (1) a resistor, (2) a current-limiting semiconductor circuit, or (3) a switching power supply type current limiter.

FIG. 6 is an electrical schematic of a switching power supply type current limiter 56. The limiter 56 includes an inductor 58, electrically connected in series between the PWM circuit 52 and the array of LEDs 22, and a power diode 60, electrically connected between ground 62 and a PWM circuit/inductor node 64. The diode 60 is designed to begin conduction after the PWM circuit 52 is switched off. In this case, the value of the inductor 58 is adjusted in conjunction with the PWM duty cycle to provide the benefits described above. The switching power supply type current limiter 56 provides higher power efficiency than the other types of current-limiting circuits listed above.

FIG. 7 is an electrical block diagram of a second power supply circuit 200 for supplying power to the light tube 20. Similar to the first power supply circuit 100, the second power supply circuit 200 includes a conventional fluorescent light tube socket 40 having two electrical female connectors 42 disposed at opposite ends of the socket 40. Accordingly, a light tube 20 particularly adapted for use with the second power supply circuit 200 includes two end caps 26 and 28, each end cap having the form of an electrical male connector 44 which mates with a corresponding electrical female connector 42 in the socket 40.

In the second power supply circuit 200, the power source 46 supplies power directly to the rectifier/filter circuit 50. The rectifier/filter circuit 50, the PWM circuit 52, and the one or more current-limiting circuits 54 operate as described above to power the one or more arrays of LEDs 22. The rectifier/filter circuit 50, the PWM circuit 52, and the one or more current-limiting circuits 54 of the second power supply circuit 200 are preferably packaged inside the end caps 26 and 28 or the bulb portion 24 of the light tube 20 or inside the light tube socket 40.

FIG. 8 is an electrical block diagram of a third power supply circuit 300 for supplying power to the light tube 20. Similar to the first and second power supply circuits 100 and 200, the third power supply circuit 300 includes a conventional fluorescent light tube socket 40 having two electrical female connectors 42 disposed at opposite ends of the socket 40. Accordingly, a light tube 20 particularly adapted for use with the third power supply circuit 300 includes two end caps 26 and 28, each end cap having the form of an electrical male connector 44 which mates with a corresponding electrical female connector 42 in the socket 40.

The third power supply circuit 300 includes a DC power source 66, such as a vehicle battery. In the third power supply circuit 300, the DC power source 66 supplies DC power directly to the PWM circuit 52. The PWM circuit 52 and the one or more current-limiting circuits 54 operate as described above to power the one or more arrays of LEDs 22. In the third power supply circuit 300, the PWM circuit 52 is preferably packaged in physical location typically occupied by the ballast of a conventional fluorescent lighting system while the one or more current-limiting circuits 54 and LEDs 22 are preferably packaged inside the light tube 20, in either one of the two end caps 26 or 28 or the bulb portion 24.

FIG. 9 is a fragmentary, perspective view of another embodiment of the present invention showing one end of the light tube 20 disconnected from one end of the light tube socket 40. In this embodiment of the present invention, the light tube socket 40 includes a pair of brackets 68 and the light tube 20 includes a pair of end caps 26 and 28 which mate with the brackets 68.

FIG. 10 is an electrical block diagram of a fourth power supply circuit 400 for supplying power to the light tube 20. Unlike the first, second, and third power supply circuits 100, 200, and 300 which are powered through direct electrical male and female connectors 44 and 42, the fourth power supply circuit 400 is powered inductively. As such, the fourth power supply circuit 400 includes a light tube socket 40 having two brackets 68 disposed at opposite ends of the socket 40. At least one bracket 68 includes an inductive transmitter 70. Accordingly, a light tube 20 particularly adapted for use with the fourth power supply circuit 400 has two end caps 26 and 28 with at least one end cap including an inductive receiver or antenna 72. When the light tube 20 is mounted in the light tube socket 40, the at least one inductive receiver 72 in the light tube 20 is disposed adjacent to the at least one inductive transmitter 70 in the light tube socket 40.

The fourth power supply circuit 400 includes the power source 46 which supplies power to the at least one inductive transmitter 70 in the light tube socket 40. The at least one transmitter 70 inductively supplies power to the at least one receiver 72 in one of the end caps 26 and/or 28 of the light tube 20. The at least one inductive receiver 72 supplies power to the rectifier/filter circuit 50. The rectifier/filter circuit 50, PWM circuit 52, and the one or more current-limiting circuits 54 operate as described above to power the one or more arrays of LEDs 22. In this manner, the light tube 20 is powered without direct electrical connection.

Ivey, John, Raymond, Jean, Timmermans, Jos

Patent Priority Assignee Title
Patent Priority Assignee Title
2826679,
2909097,
3272977,
3318185,
3561719,
3586936,
3601621,
3612855,
3643088,
3739336,
3746918,
3818216,
3821590,
3832503,
3858086,
3909670,
3924120,
3958885, Sep 05 1972 Wild Heerbrugg Aktiengesellschaft Optical surveying apparatus, such as transit, with artificial light scale illuminating system
3969720, Jul 26 1974 Emergency alarm and evacuation system
3974637, Mar 28 1975 Time Computer, Inc. Light emitting diode wristwatch with angular display
3993386, Sep 02 1975 Lamp energy saving spacer
4001571, Jul 26 1974 National Service Industries, Inc. Lighting system
4009394, Oct 28 1975 Magnavox Electronic Systems Company Remote control light transmitter employing a cylindrical lens
4054814, Oct 31 1975 AT & T TECHNOLOGIES, INC , Electroluminescent display and method of making
4070568, Dec 09 1976 AG COMMUNICATION SYSTEMS CORPORATION, 2500 W UTOPIA RD , PHOENIX, AZ 85027, A DE CORP Lamp cap for use with indicating light assembly
4082395, Feb 22 1977 GENLYTE GROUP INCORPORATED, THE A CORP OF DELAWARE Light track device with connector module
4096349, Apr 04 1977 GENLYTE GROUP INCORPORATED, THE A CORP OF DELAWARE Flexible connector for track lighting systems
4102558, Aug 29 1977 Developmental Sciences, Inc. Non-shocking pin for fluorescent type tubes
4107581, May 08 1975 Fluorescent lamp insert with conductive rod support
4189663, Jun 15 1976 Forest Electric Company Direct current ballasting and starting circuitry for gaseous discharge lamps
4211955, Mar 02 1978 Solid state lamp
4241295, Feb 21 1979 Digital lighting control system
4257672, Dec 28 1978 International Business Machines Corporation Optical coupler for connecting a light source to an optical transmission line
4261029, Feb 09 1978 S A B I R , 156, BOULEVARD HAUSSMAN, A CORP OF Lighting device with rotatable reflector
4262255, Mar 18 1977 Matsushita Electric Industrial Co., Ltd. Level indicating device
4271408, Oct 17 1978 Stanley Electric Co., Ltd. Colored-light emitting display
4271458, Mar 10 1980 Tivoli Industries, Inc. Decorative light tubing
4272689, Sep 22 1978 Hubbell Incorporated Flexible wiring system and components therefor
4273999, Jan 18 1980 The United States of America as represented by the Secretary of the Navy Equi-visibility lighting control system
4298869, Jun 29 1978 Zaidan Hojin Handotai Kenkyu Shinkokai Light-emitting diode display
4329625, Jul 24 1978 Zaidan Hojin Handotai Kenkyu Shinkokai Light-responsive light-emitting diode display
4339788, Aug 15 1980 EVEREADY BATTERY COMPANY, INC , A CORP OF DE Lighting device with dynamic bulb position
4342947, Oct 14 1977 Light indicating system having light emitting diodes and power reduction circuit
4344117, Sep 11 1980 Searchlight reversing mechanism
4367464, May 29 1979 Mitsubishi Denki Kabushiki Kaisha Large scale display panel apparatus
4382272, Nov 15 1979 QUELLA, FERDINAND; PAPE, HEINZ Colored lamp
4388567, Feb 25 1980 Toshiba Electric Equipment Corporation Remote lighting-control apparatus
4388589, Jun 23 1980 Color-emitting DC level indicator
4392187, Mar 02 1981 VARI-LITE, INC , A CORP OF DE Computer controlled lighting system having automatically variable position, color, intensity and beam divergence
4394719, Dec 11 1981 Eastman Kodak Company Current control apparatus for a flyback capacitor charger
4420711, Jun 15 1981 ABBOTT LABORATORIES, A CORP OF IL Circuit arrangement for different color light emission
4455562, Aug 14 1981 Pitney Bowes Inc. Control of a light emitting diode array
4500796, May 13 1983 CITIBANK, N A , AS ADMINISTRATIVE AND COLLATERAL AGENT System and method of electrically interconnecting multiple lighting fixtures
4521835, May 17 1983 H KOCH & SONS CO Flexible elongated lighting system
4531114, May 06 1982 Safety Intelligence Systems Intelligent fire safety system
4581687, May 16 1984 ABC Trading Company, Ltd. Lighting means for illuminative or decorative purpose and modular lighting tube used therefor
4597033, May 17 1983 H KOCH & SONS CO Flexible elongated lighting system
4600972, Aug 23 1984 HAZENLITE INCORPORATED, A CORP OF CA Emergency lighting apparatus
4607317, Aug 14 1984 LEI YUEH ENTERPRISE Non-neon light
4622881, Dec 06 1984 FRED HAYMAN BEVERLY HILLS, INC Visual display system with triangular cells
4625152, Jul 18 1983 Matsushita Electric Works, Ltd. Tricolor fluorescent lamp
4635052, Jul 27 1982 Toshiba Denzai Kabushiki Kaisha Large size image display apparatus
4647217, Jan 08 1986 Variable color digital timepiece
4656398, Dec 02 1985 Lighting assembly
4661890, Mar 29 1985 Kabushiki Kaisha Toshiba Lamp unit
4668895, Mar 18 1985 Omega Electronics S.A. Driving arrangement for a varying color light emitting element
4669033, Sep 19 1985 Specuflex, Inc. Adjustable optical reflector for fluorescent fixture
4675575, Jul 13 1984 E & G ENTERPRISES SCOTTSDALE ARIZONA A PARTNERSHIP OF ARIZONA Light-emitting diode assemblies and systems therefore
4682079, Oct 04 1984 Hallmark Cards, Inc. Light string ornament circuitry
4686425, Apr 28 1986 Multicolor display device
4687340, Jan 08 1986 Electronic timepiece with transducers
4688154, Oct 19 1983 Track lighting system with plug-in adapters
4688869, Dec 12 1985 Modular electrical wiring track arrangement
4695769, Nov 27 1981 WIDE- LITE INTERNATIONAL CORPORATION Logarithmic-to-linear photocontrol apparatus for a lighting system
4698730, Aug 01 1986 Stanley Electric Co., Ltd. Light-emitting diode
4701669, May 14 1984 Honeywell Inc. Compensated light sensor system
4705406, Jan 08 1986 Electronic timepiece with physical transducer
4707141, Jan 08 1986 Variable color analog timepiece
4727289, Jul 22 1985 STANLEY ELECTRIC CO , LTD , A CORP OF JAPAN LED lamp
4727457, Jan 24 1986 U S PHILIPS CORPORATION Surface-mounted optoelectronic device
4739454, Jun 17 1986 SATCO PRODUCTS, INC , A NY CORP Adjustable display light
4740882, Jun 27 1986 Environmental Computer Systems, Inc. Slave processor for controlling environments
4748545, Feb 20 1986 Reflector Hardware Corporation Illumination systems
4753148, Dec 01 1986 Sound emphasizer
4758173, May 31 1984 DURO-TEST CORPORATION, INC Socket adaptor for fluorescent lamp
4765708, Sep 11 1985 Alcatel Kabel AG & Co Storage device for a spare length of an optical line
4767172, Jan 28 1983 Xerox Corporation Collector for an LED array
4771274, Jan 08 1986 Variable color digital display device
4780621, Jun 30 1987 Frank J., Bartleucci; Anthony, Ciuffo Ornamental lighting system
4794373, Aug 27 1986 COLLINS & AIKMAN SUBSIDIARY CORPORATION Lighting strip apparatus for visually guiding the occupants of a structure
4794383, Jan 15 1986 TEXAS DIGITAL SYSTEMS, INC Variable color digital multimeter
4801928, Sep 02 1986 CHLORIDE GROUP PLC, A CORP OF ENGLAND Egress direction indication system
4810937, Apr 28 1986 Multicolor optical device
4818072, Jul 22 1986 Raychem Corporation Method for remotely detecting an electric field using a liquid crystal device
4824269, Mar 14 1986 Variable color display typewriter
4837565, Aug 13 1987 HEWLETT-PACKARD DEVELOPMENT COMPANY, L P Tri-state function indicator
4843627, Aug 05 1986 STEBBINS, RUSSELL T Circuit and method for providing a light energy response to an event in real time
4845481, Jan 08 1986 TEXAS DIGITAL SYSTEMS, INC Continuously variable color display device
4845745, Nov 17 1986 Display telephone with transducer
4851972, May 11 1987 Light and Sound Specialties, Inc. Moisture resistant lighting tube
4854701, Dec 20 1986 U S PHILIPS CORPORATION, A CORP OF DE Arrangement for inspecting light waveguide end faces
4857801, Apr 18 1983 Litton Systems, Inc Dense LED matrix for high resolution full color video
4863223, Apr 18 1986 ZUMTOBEL LICHT GMBH & CO Workstation arrangement for laboratories, production facilities and the like
4870325, Dec 18 1985 , Ornamental light display apparatus
4874320, May 24 1988 Lucifer Lighting Company Flexible light rail
4887074, Jan 20 1988 AMERATECH, INC , 2708 WRONDELL WAY RENO, NV 89502, A NV CORP Light-emitting diode display system
4894832, Sep 15 1988 North American Philips Corporation Wide band gap semiconductor light emitting devices
4901207, Jun 09 1987 Kabushiki Kaisha Toshiba; Sharp Kabushiki Kaisha Light emission element array and manufacturing method thereof
4904988, Mar 06 1989 Toy with a smoke detector
4912371, Feb 27 1989 Power saving fluorescent lamp substitute
4922154, Jan 11 1988 Chromatic lighting display
4929936, Mar 21 1988 Home Security Systems, Inc. LED illuminated sign
4934852, Mar 14 1986 Variable color display typewriter
4941072, Apr 08 1988 Sanyo Electric Co., Ltd.; Tottori Sanyo Electric Co., Ltd. Linear light source
4943900, Aug 10 1987 Lighting fixture
4962687, Sep 06 1988 ZODIAC POOL SYSTEMS, INC Variable color lighting system
4965561, Jan 08 1986 TEXAS DIGITAL SYSTEMS, INC Continuously variable color optical device
4973835, Nov 30 1989 Actively-illuminated accessory
4977351, Oct 15 1985 BAVCO MANUFACTURING COMPANY, INC , A MA CORP Emergency lighting system
4979081, Dec 07 1989 ARDEE LIGHTING U S A , INC , A CORP OF FL Electrical supply system
4979180, Nov 24 1989 Modular interchangeable laser system
4980806, Jul 17 1986 VARI-LITE, INC , A CORP OF DE Computer controlled lighting system with distributed processing
4991070, Jul 12 1989 Herman Miller, Inc. Sleeve for a light element
4992704, Apr 17 1989 Basic Electronics, Inc. Variable color light emitting diode
5001609, Oct 05 1988 AVAGO TECHNOLOGIES ECBU IP SINGAPORE PTE LTD Nonimaging light source
5003227, Feb 08 1984 Power distribution for lighting systems
5008595, Dec 18 1985 Laser Link, Inc.; William K., Wells, Jr. Ornamental light display apparatus
5008788, Apr 02 1990 Electronic Research Associates, Inc. Multi-color illumination apparatus
5010459, Jul 17 1986 GENLYTE THOMAS GROUP LLC, A DELAWARE LIMITED LIABILITY COMPANY Console/lamp unit coordination and communication in lighting systems
5018054, Apr 24 1989 Sharp Kabushiki Kaisha Exposure device with filter
5027037, Jan 05 1990 Tone World International Corp. Controller for continuous tracing lights
5027262, May 24 1988 Lucifer Lighting Company Flexible light rail
5032960, Feb 15 1989 Sharp Kabushiki Kaisha Light source device with arrayed light emitting elements and manufacturing therefor
5034807, Mar 10 1986 RESPONSE REWARD SYSTEMS, L C System for evaluation and rewarding of responses and predictions
5036248, Mar 31 1989 Ledstar Inc. Light emitting diode clusters for display signs
5038255, Sep 09 1989 Stanley Electric Co., Ltd.; FURUKAWA ELECTRIC CO., LTD. Vehicle lamp
5065226, Jun 16 1989 JDS Uniphase Corporation Laser diode module
5072216, Dec 07 1989 ELECTRONIC THEATRE CONTROLS, INC Remote controlled track lighting system
5078039, Sep 06 1988 ELECTRONIC THEATRE CONTROLS, INC Microprocessor controlled lamp flashing system with cooldown protection
5083063, Aug 16 1989 De La Rue Systems Limited Radiation generator control apparatus
5088013, Aug 30 1990 Clip for holding messages with reminder light
5089748, Jun 13 1990 Delphi Technologies Inc Photo-feedback drive system
5103382, Aug 07 1990 Stanley Electric Company Auxiliary stop lamps
5122733, Jan 15 1986 Variable color digital multimeter
5126634, Sep 25 1990 Beacon Light Products, Inc.; BEACON LIGHT PRODUCTS, INC Lamp bulb with integrated bulb control circuitry and method of manufacture
5128595, Oct 23 1990 Minami International Corporation Fader for miniature lights
5130761, Jul 17 1990 Kabushiki Kaisha Toshiba Led array with reflector and printed circuit board
5130909, Apr 18 1991 H KOCH & SONS CO Emergency lighting strip
5134387, Nov 06 1989 Texas Digital Systems, Inc. Multicolor display system
5136483, Sep 08 1989 Illuminating device
5140220, Dec 02 1985 SAKAI, YUMI; UCHIYAMA, MASAKATSU Light diffusion type light emitting diode
5142199, Nov 29 1990 Novitas, Incorporated Energy efficient infrared light switch and method of making same
5151679, Mar 31 1988 Frederick, Dimmick Display sign
5154641, Apr 30 1991 Lucifer Lighting Company Adapter to energize a light rail
5161879, Apr 10 1991 Flashlight for covert applications
5161882, Aug 15 1991 Christmas lighting organizer apparatus
5164715, May 25 1989 Stanley Electric Co. Ltd. Color display device
5184114, Nov 04 1982 General Electric Company Solid state color display system and light emitting diode pixels therefor
5194854, Jan 15 1986 Multicolor logic device
5198756, Jul 29 1991 ATG ELECTRONIC, INC Test fixture wiring integrity verification device
5209560, Jul 17 1986 Vari-Lite, Inc. Computer controlled lighting system with intelligent data distribution network
5220250, Oct 17 1990 North American Philips Corp. Fluorescent lamp lighting arrangement for "smart" buildings
5225765, Aug 15 1984 Inductorless controlled transition and other light dimmers
5226723, May 11 1992 Light emitting diode display
5254910, Apr 03 1992 Color-differential type light display device
5256948, Apr 03 1992 Tri-color flasher for strings of dual polarity light emitting diodes
5268828, Apr 19 1991 Takiron Co., Ltd. Illuminant display device
5278542, Nov 06 1989 Texas Digital Systems, Inc. Multicolor display system
5282121, Apr 30 1991 Vari-Lite, Inc. High intensity lighting projectors
5283517, Jan 15 1986 TEXAS DIGITAL SYSTEMS, INC Variable color digital multimeter
5287352, Jul 17 1992 SIEMENS ENTERPRISE COMMUNICATIONS, INC Method and apparatus to reduce register overhead in a serial digital interface
5294865, Sep 18 1992 GTE Products Corporation Lamp with integrated electronic module
5298871, Dec 25 1991 Renesas Electronics Corporation Pulse width modulation signal generating circuit
5301090, Mar 16 1992 AHARON ZEEV HED Luminaire
5303124, Jul 21 1993 DATA DISPLAY PRODUCTS Self-energizing LED lamp
5307295, Jan 14 1991 VARI-LITE, INC Creating and controlling lighting designs
5321593, Oct 27 1992 Strip lighting system using light emitting diodes
5323226, Jun 27 1991 SCHREDER Method of measuring light levels and device for implementing this method
5329431, Jul 17 1986 Vari-Lite, Inc. Computer controlled lighting system with modular control resources
5344068, Apr 16 1993 SIEMENS INDUSTRY, INC Dynamically controlled environmental control system
5350977, Jun 15 1992 Matsushita Electric Works, Ltd. Luminaire of variable color temperature for obtaining a blend color light of a desired color temperature from different emission-color light sources
5357170, Feb 12 1993 Lutron Technology Company LLC Lighting control system with priority override
5365411, Jan 06 1993 Thomas & Betts International, Inc Exit signs with LED illumination
5371618, Jan 05 1993 Brite View Technologies Color liquid crystal display employing dual cells driven with an EXCLUSIVE OR relationship
5374876, Dec 19 1991 HORIBATA, HIROSHI Portable multi-color signal light with selectively switchable LED and incandescent illumination
5375043, Jul 27 1992 Inoue Denki Co., Inc. Lighting unit
5381074, Jun 01 1993 Chrysler Corporation Self calibrating lighting control system
5388357, Apr 08 1993 Computer Power Inc. Kit using led units for retrofitting illuminated signs
5402702, Jul 14 1992 Jalco Co., Ltd. Trigger circuit unit for operating light emitting members such as leds or motors for use in personal ornament or toy in synchronization with music
5404094, Mar 18 1994 ABL IP Holding, LLC Wide input power supply and method of converting therefor
5404282, Sep 17 1993 Lumileds LLC Multiple light emitting diode module
5406176, Jan 12 1994 SUGDEN, WALTER H Computer controlled stage lighting system
5410328, Mar 28 1994 Trans-Lux Corporation Replaceable intelligent pixel module for large-scale LED displays
5412284, Mar 25 1992 Two photocell controlled lighting system employing filters for the two photocells that control on/off operation for the system
5412552, Mar 25 1993 Lighting lamp bar
5420482, Feb 11 1993 Controlled lighting system
5421059, May 24 1993 Traverse support rod
5430356, Oct 05 1993 Lutron Technology Company LLC Programmable lighting control system with normalized dimming for different light sources
5432408, Apr 09 1991 Ken, Hayashibara Filling composition for incandescent lamp, and incandescent lamp containing the same and its use
5436535, Dec 29 1992 Multi-color display unit
5436853, Jul 24 1991 NEC Electronics Corporation Remote control signal processing circuit for a microcomputer
5450301, Oct 05 1993 Trans-Lux Corporation Large scale display using leds
5461188, Mar 07 1994 DRAGO, MARCELLO S Synthesized music, sound and light system
5463280, Mar 03 1994 ABL IP Holding, LLC Light emitting diode retrofit lamp
5463502, May 16 1994 TALL TOWER LED, LLC Lens assembly for use with LEDs
5465144, May 31 1990 GVBB HOLDINGS S A R L Remote tracking system for moving picture cameras and method
5473522, Jul 25 1994 Sportlite, Inc. Modular luminaire
5475300, Jan 15 1986 TEXAS DIGITAL SYSTEMS, INC Variable color digital multimeter
5481441, Sep 20 1993 Adjustable light bar apparatus
5489827, May 06 1994 Philips Electronics North America Corporation Light controller with occupancy sensor
5491402, Jul 20 1993 Echelon Corporation Apparatus and method for providing AC isolation while supplying DC power
5493183, Nov 14 1994 WORLD PROPERTIES, INC Open loop brightness control for EL lamp
5504395, Mar 08 1993 BEACON LIGHT PRODUCTS, INC Lamp bulb having integrated RFI suppression and method of restricting RFI to selected level
5506760, Jul 01 1993 Temic Telefunken Microelectronic GmbH Light fitting unit for illuminated signs
5513082, Dec 16 1994 Oshino Electric Lamp Works, Ltd. Small lamp socket device for panel/printed board
5519496, Jan 07 1994 APPLIED INTELLIGENT SYSTEMS, INC Illumination system and method for generating an image of an object
5530322, Apr 11 1994 Lutron Technology Company LLC Multi-zone lighting control system
5544809, Dec 28 1993 ONITY INC Hvac control system and method
5545950, Nov 05 1993 Adapter, fitting into an incandescent socket, for receiving a compact flourescent lamp
5550440, Nov 16 1994 ELECTRONICS DIVERSIFIED, LLC Sinusoidal inductorless dimmer applying variable frequency power signal in response to user command
5559681, May 13 1994 CNC Automation, Inc.; CNC AUTOMATION, INC Flexible, self-adhesive, modular lighting system
5561346, Aug 10 1994 LED lamp construction
5575459, Apr 27 1995 Uniglo Canada Inc. Light emitting diode lamp
5575554, May 13 1991 Multipurpose optical display for articulating surfaces
5581158, Sep 21 1989 Etta Industries, Inc. Lamp brightness control circuit with ambient light compensation
5592051, Nov 13 1991 IWS INTERNATIONAL INC Intelligent lamp or intelligent contact terminal for a lamp
5592054, Sep 06 1995 General Electric Company Fluorescent lamp ballast with selectable power levels
5600199, Sep 15 1994 Fluorescent lamp with spring-loaded terminal pins
5607227, Aug 27 1993 SANYO ELECTRIC CO , LTD ; TOTTORI SANYO ELECTRIC CO , LTD Linear light source
5608290, Jan 26 1995 DOMINION AUTOMOTIVE GROUP, INC LED flashing lantern
5614788, Jan 31 1995 BENEDICT, CHARLES E Automated ambient condition responsive daytime running light system
5621282, Apr 10 1995 Programmable distributively controlled lighting system
5621603, Jul 26 1995 United Technologies Corporation Pulse width modulated solenoid driver controller
5621662, Feb 15 1994 RUSSOUND FMP, INC Home automation system
5622423, Oct 09 1995 Hand-carried traffic control light
5633629, Feb 08 1995 Relume Technologies, Inc Traffic information system using light emitting diodes
5634711, Sep 13 1993 EXCELITAS CANADA, INC Portable light emitting apparatus with a semiconductor emitter array
5639158, Aug 19 1994 NEC Corporation Led-array light source
5640061, Nov 05 1993 VARI-LITE, INC Modular lamp power supply system
5640141, May 06 1992 INTERNATIONAL BUSINESS INNOVATIONS LTD Surveillance and alarm device for room spaces
5640792, Jun 07 1995 ACUITY BRANDS, INC FORMERLY KNOWN AS L & C SPINCO, INC Lighting fixtures
5642129, Mar 23 1994 Kopin Corporation Color sequential display panels
5655830, Dec 01 1993 Hubbell Incorporated Lighting device
5656935, Jan 15 1986 TEXAS DIGITAL SYSTEMS, INC Variable color display system
5661374, Dec 14 1994 Astronics Corporation LED light strip with brightness/current draw control circuitry
5661645, Jun 27 1996 WELLS, III, CHARLES, TEE Power supply for light emitting diode array
5673059, Mar 23 1994 Kopin Corporation Head-mounted display apparatus with color sequential illumination
5682103, May 24 1995 N.V. Bekaert S.A. Infrared detection of authenticity of security documents comprising electromagnetic particles
5684523, Nov 15 1990 Ricoh Company, Ltd.; Ricoh Research Institute of General Electronics Co., Ltd. Optical line printhead and an LED chip used therefor
5688042, Nov 17 1995 Thomas & Betts International LLC LED lamp
5690417, May 13 1996 Optical Gaging Products, Inc. Surface illuminator with means for adjusting orientation and inclination of incident illumination
5697695, Jan 27 1997 Signal stick
5701058, Jan 04 1996 Honeywell Inc.; Honeywell INC Method of semiautomatic ambient light sensor calibration in an automatic control system
5712650, Aug 18 1995 CAPITALSOURCE FINANCE LLC Large incandescent live image display system
5713655, Jan 23 1995 Emergency safety light
5721471, Mar 10 1995 U.S. Philips Corporation Lighting system for controlling the color temperature of artificial light under the influence of the daylight level
5725148, Jan 16 1996 Optimum Energy, LLC Individual workspace environmental control
5726535, Apr 10 1996 Technical Consumer Products, Inc LED retrolift lamp for exit signs
5731759, Aug 07 1995 Combination flashlight, smoke detector and emergency alarm
5734590, Oct 16 1992 Recording medium and device for generating sounds and/or pictures
5751118, Jul 07 1995 Universal Lighting Technologies, Inc Universal input dimmer interface
5752766, Mar 11 1997 BELLIVEAU, RICHARD S Multi-color focusable LED stage light
5765940, Oct 21 1996 Dialight Corporation LED-illuminated stop/tail lamp assembly
5769527, Jul 17 1986 VARI-LITE, INC Computer controlled lighting system with distributed control resources
5784006, Jul 05 1996 Relume Technologies, Inc Annunciator system with mobile receivers
5785227, Nov 10 1995 Hitachi Koki Co., Ltd. Adjustment mechanism for adjusting depth at which pneumatic nailing machine drives nails into workpiece
5790329, Sep 27 1995 Color changing device for illumination purposes
5803579, Jun 13 1996 Gentex Corporation Illuminator assembly incorporating light emitting diodes
5803580, Aug 22 1997 Decorative light
5803729, Jul 17 1996 Efraim, Tsimerman Curing light
5806965, Jan 27 1997 R&M DEESE, INC , DBA ELECTRO-TECH S LED beacon light
5808689, Apr 20 1994 Shoot The Moon Products, Inc. Method and apparatus for nesting secondary signals within a television signal
5810463, Nov 28 1994 Nikon Corporation Illumination device
5812105, Jun 10 1996 Cree, Inc Led dot matrix drive method and apparatus
5813751, Jan 15 1997 Device for permanent installation of christmas lighting
5813753, May 27 1997 Philips Electronics North America Corp UV/blue led-phosphor device with efficient conversion of UV/blues light to visible light
5821695, Aug 06 1996 APPLETON ELECTRIC LLC Encapsulated explosion-proof pilot light
5825051, Oct 12 1996 Preh-Werke GmbH & Co. KG Optoelectronic component with central hollow
5828178, Dec 09 1996 Koninklijke Philips Electronics N V High intensity discharge lamp color
5831522, Apr 25 1995 Portable visual emergency signal device
5836676, May 07 1996 KOHA CO , LTD Light emitting display apparatus
5848837, Aug 28 1995 StanTech Integrally formed linear light strip with light emitting diodes
5850126, Apr 11 1997 The Cooper Union For The Advancement Of Science and Art Screw-in led lamp
5851063, Oct 28 1996 General Electric Company Light-emitting diode white light source
5852658, Jun 12 1997 MICRO TECHNOLOGY SERVICES, INC Remote meter reading system
5854542, Aug 30 1996 IGT, a Nevada Corporation Flashing and diming fluorescent lamps for a gaming device
5859508, Feb 25 1991 Pixtech, Inc. Electronic fluorescent display system with simplified multiple electrode structure and its processing
5865529, Mar 10 1997 Technical Consumer Products, Inc Light emitting diode lamp having a spherical radiating pattern
5870233, Dec 24 1993 Evonik Rohm GmbH Process for manufacture of fresnel lenses
5890794, Apr 03 1996 Lighting units
5893633, Dec 13 1995 ALPS Electric Co., Ltd. Light-emitting apparatus and method of producing the same
5896010, Sep 29 1995 Visteon Global Technologies, Inc System for controlling lighting in an illuminating indicating device
5904415, Jun 25 1996 H E WILLIAMS, INC Fluorescent bulb connector assembly
5907742, Mar 09 1997 HEWLETT-PACKARD DEVELOPMENT COMPANY, L P Lamp control scheme for rapid warmup of fluorescent lamp in office equipment
5909378, Apr 09 1997 LOG-ONE LIMITED; KONTROL ENERGY GROUP INC Control apparatus and method for maximizing energy saving in operation of HVAC equipment and the like
5912653, Sep 15 1994 SQUIB INTERNATIONAL, INC Garment with programmable video display unit
5917287, Mar 21 1997 Patent-Treuhand-Gesellschaft fuer elektrische Gluehlampen mbH Operating circuit for high-pressure discharge lamps with an ignition-time bridging function
5917534, Jun 29 1995 Eastman Kodak Company Light-emitting diode arrays with integrated photodetectors formed as a monolithic device and methods and apparatus for using same
5921660, Jan 02 1997 Electric bulb for identification lamp
5924784, Aug 21 1995 Microprocessor based simulated electronic flame
5927845, Aug 28 1995 StanTech Integrally formed linear light strip with light emitting diodes
5934792, Feb 24 1997 ITC, INC Flexible lighting system
5936599, Jan 27 1995 AC powered light emitting diode array circuits for use in traffic signal displays
5943802, Apr 07 1997 MARK IV IDS CORP Reflective display with front lighting
5946209, Feb 02 1995 Hubbell Incorporated Motion sensing system with adaptive timing for controlling lighting fixtures
5949347, Sep 11 1996 WU, CHEN-HO Light emitting diode retrofitting lamps for illuminated signs
5951145, Mar 22 1996 Toshiba Lighting & Technology Corporation Lighting apparatus
5952680, Oct 11 1994 International Business Machines Corporation Monolithic array of light emitting diodes for the generation of light at multiple wavelengths and its use for multicolor display applications
5959547, Feb 09 1995 Baker Hughes Incorporated Well control systems employing downhole network
5961072, Apr 20 1995 SAF-T-GLO LIMITED Emergency lighting
5962989, Jan 17 1995 NEGAWATT TECHNOLOGIES INC Energy management control system
5962992, Oct 14 1997 CHAW KHONG TECHNOLOGY CO , LTD Lighting control system
5963185, Jul 07 1986 TEXAS DIGITAL SYSTEMS, INC Display device with variable color background area
5966069, Mar 19 1998 PRESCOLITE, INC Exit sign self-testing system
5974553, Jul 31 1996 MEDIAFLOW INC Method for powering elements connected in a two-wire bus network transmitting both power supply and data information pulses
5980064, Nov 02 1998 Illumination cell for a votive light
5998925, Jul 29 1996 Nichia Corporation Light emitting device having a nitride compound semiconductor and a phosphor containing a garnet fluorescent material
5998928, Nov 03 1997 WILMINGTON TRUST FSB, AS ADMINISTRATIVE AGENT Lighting intensity control system
6000807, Apr 25 1997 GREGORY B MORELAND Switch cover plate providing automatic emergency lighting
6007209, Mar 19 1997 SEOUL SEMICONDUCTOR CO , LTD Light source for backlighting
6008783, May 28 1996 Kawai Musical Instruments Manufacturing Co. Ltd. Keyboard instrument with the display device employing fingering guide
6010228, Nov 13 1997 Stephen E., Blackman Wireless emergency safety light with sensing means for conventional light switch or plug receptacle
6011691, Apr 23 1998 Lockheed Martin Corporation Electronic component assembly and method for low cost EMI and capacitive coupling elimination
6016038, Aug 26 1997 PHILIPS LIGHTING NORTH AMERICA CORPORATION Multicolored LED lighting method and apparatus
6018237, May 23 1988 TEXAS DIGITAL SYSTEMS, INC Variable color display system
6019493, Mar 13 1998 High efficiency light for use in a traffic signal light, using LED's
6020825, Nov 12 1993 LEVITON MANUFACTURING CO , INC Theatrical lighting control network
6025550, Feb 05 1998 Casio Computer Co., Ltd. Musical performance training data transmitters and receivers, and storage mediums which contain a musical performance training program
6028694, May 22 1997 Illumination device using pulse width modulation of a LED
6030099, Jun 16 1998 Selected direction lighting device
6031343, Mar 11 1998 Brunswick Bowling & Billiards Corporation Bowling center lighting system
6031958, May 21 1997 Optical light pipes with laser light appearance
6036335, Sep 29 1997 Cut-to-length linear lighting, and two-dimensional and three-dimensional decorative lights, from omni-directional LED lamps
6036636, Nov 18 1996 Olympus Optical Co., Ltd. Endoscope with tip portion disposed on distal side of insertion portion
6056420, Aug 13 1998 OXYGEN ENTERPRISES LTD Illuminator
6068383, Mar 02 1998 H E WILLIAMS, INC Phosphorous fluorescent light assembly excited by light emitting diodes
6069597, Aug 29 1997 Canon Kabushiki Kaisha Circuit and method for controlling the brightness of an FED device
6072280, Aug 28 1998 Fiber Optic Designs, Inc. Led light string employing series-parallel block coupling
6084359, Jun 26 1996 General Electric Company Coil assembly for an electrodeless fluorescent lamp
6086220, Sep 30 1998 Lash International Inc. Marine safety light
6091200, Dec 17 1998 Fluorescent light and motion detector with quick plug release and troubleshooting capabilities
6092915, Jan 30 1998 The Boeing Company; Boeing Company, the Decorative lighting laminate
6095661, Mar 19 1998 Lemaire Illumination Technologies, LLC Method and apparatus for an L.E.D. flashlight
6097352, Mar 23 1994 Kopin Corporation Color sequential display panels
6115184, Nov 13 1998 Xerox Corporation Light collector for an LED array
6116748, Jun 17 1998 DIAMOND CREEK CAPITAL, LLC Aisle lighting system
6121875, Feb 08 1996 SECURITAS SECURITY SYSTEMS USA, INC Monitoring and alerting system for buildings
6127783, Dec 18 1998 Philips Electronics North America Corp.; Philips Electronics North America Corp LED luminaire with electronically adjusted color balance
6132072, Jun 13 1996 Gentex Corporation Led assembly
6135604, Oct 25 1999 Decorative water lamp
6135620, Apr 10 1996 BJI Energy Solutions, LLC CCFL illuminated device
6139174, Aug 25 1998 HEWLETT-PACKARD DEVELOPMENT COMPANY, L P Light source assembly for scanning devices utilizing light emitting diodes
6149283, Dec 09 1998 Rensselaer Polytechnic Institute (RPI) LED lamp with reflector and multicolor adjuster
6150774, Aug 26 1997 PHILIPS LIGHTING NORTH AMERICA CORPORATION Multicolored LED lighting method and apparatus
6151529, Feb 02 1995 Hubbell Incorporated Motion sensing system with adaptive timing for controlling lighting fixtures
6153985, Jul 09 1999 Dialight Corporation LED driving circuitry with light intensity feedback to control output light intensity of an LED
6158882, Jun 30 1998 EMTEQ, INC LED semiconductor lighting system
6166496, Dec 17 1997 PHILIPS LIGHTING NORTH AMERICA CORPORATION Lighting entertainment system
6175201, Feb 26 1999 MAF Technologies Corp. Addressable light dimmer and addressing system
6175220, Oct 22 1999 POWER INNOVATIONS, INCORPORATED Short-circuit protection for forward-phase-control AC power controller
6181126, Jan 15 1986 Texas Digital Systems, Inc. Dual variable color measuring system
6183086, Mar 12 1999 Bausch & Lomb Surgical, Inc.; BAUSCH & LOMB SURGICAL, INC Variable multiple color LED illumination system
6183104, Feb 18 1998 Decorative lighting system
6184628, Nov 30 1999 ZODIAC POOL CARE, INC Multicolor led lamp bulb for underwater pool lights
6196471, Nov 30 1999 HSBC BANK USA, N A Apparatus for creating a multi-colored illuminated waterfall or water fountain
6203180, Sep 22 1998 Diehl Striftung & Co. Aeroplane cabin lighting arrangement
6211626, Aug 26 1997 PHILIPS LIGHTING NORTH AMERICA CORPORATION Illumination components
6215409, May 17 1996 Sotek Australia Pty Ltd Display apparatus
6217190, Oct 02 1997 The Whitaker Corporation Lighting assembly for multiple fluorescent lamps
6219239, May 26 1999 Hewlett Packard Enterprise Development LP EMI reduction device and assembly
6227679, Sep 16 1999 MULE LIGHTING; SHANGHAI BOASHAN IMPORT & EXPORT TRADE CORPORATION, LTD Led light bulb
6234645, Sep 28 1998 PHILIPS LIGHTING NORTH AMERICA CORPORATION LED lighting system for producing white light
6238075, Dec 17 1996 Transmatic, Inc. Lighting system for mass-transit vehicles
6240665, Jan 05 1999 JJI Lighting Group, Inc. Illuminated sign
6241359, Apr 14 1998 Fluid filled light apparatus
6249221, Jul 28 1999 Emergency detector door illumination escape system
6250774, Jan 23 1997 PHILIPS LIGHTING NORTH AMERICA CORPORATION Luminaire
6252350, Jul 31 1998 Surface mounted LED lamp
6252358, Aug 14 1998 Wireless lighting control
6268600, Aug 01 1994 MATSUSHITA ELECTRIC INDUSTRIAL CO ,LTD Linear illumination device
6273338, Sep 22 1998 Low cost color-programmable focusing ring light
6292901, Aug 26 1997 PHILIPS LIGHTING NORTH AMERICA CORPORATION Power/data protocol
6297724, Sep 09 1994 CommScope Technologies LLC Lighting control subsystem for use in system architecture for automated building
6305109, Dec 09 1999 Structure of signboard
6305821, Feb 08 2000 GENCOM ENTERPRISE CO , LTD Led lamp having ball-shaped light diffusing modifier
6307331, May 18 1998 Leviton Manufacturing Co., Inc. Multiple sensor lux reader and averager
6310590, Jan 15 1986 Texas Digital Systems, Inc. Method for continuously controlling color of display device
6315429, Oct 15 1999 Aquatic Attractor Inc. Underwater lighting system
6323832, Sep 27 1986 TOHOKU UNIVERSITY Color display device
6325651, Jul 27 1996 Moriyama Sangyo Kabushiki Kaisha Light emitting device, socket device and lighting device
6334699, Apr 08 1999 Mitutoyo Corporation Systems and methods for diffuse illumination
6340868, Aug 26 1997 PHILIPS LIGHTING NORTH AMERICA CORPORATION Illumination components
6362578, Dec 23 1999 STMICROELECTRONICS, S R L LED driver circuit and method
6371637, Feb 26 1999 Radiantz, Inc. Compact, flexible, LED array
6380865, Apr 06 1999 911EP, INC Replacement led lamp assembly and modulated power intensity for light source
6394623, Jul 14 2000 Neon King Limited Translucent flexible rope light and methods of forming and using same
6400096, Aug 20 1999 Texas Instruments Control circuit for piezo transformer based fluorescent lamp power supplies
6404131, Aug 09 1999 YOSHICHU MANNEQUIN CO , LTD; KAZUO KOBAYASHI Light emitting display
6411045, Dec 14 2000 CURRENT LIGHTING SOLUTIONS, LLC F K A GE LIGHTING SOLUTIONS, LLC Light emitting diode power supply
6429604, Jan 21 2000 Koninklijke Philips Electronics N V Power feedback power factor correction scheme for multiple lamp operation
6445139, Dec 18 1998 PHILIPS LIGHTING HOLDING B V Led luminaire with electrically adjusted color balance
6459919, Aug 26 1997 PHILIPS LIGHTING NORTH AMERICA CORPORATION Precision illumination methods and systems
6464373, Nov 03 2000 TWR Lighting, Inc. Light emitting diode lighting with frustoconical reflector
6469457, Jul 29 1997 Power and data distribution in lighting systems
6471388, Dec 30 1999 BJI Energy Solutions, LLC Illumination apparatus for edge lit signs and display
6495964, Dec 18 1998 PHILIPS LIGHTING HOLDING B V LED luminaire with electrically adjusted color balance using photodetector
6511204, Dec 16 1999 3M Innovative Properties Company Light tube
6528954, Aug 26 1997 PHILIPS LIGHTING NORTH AMERICA CORPORATION Smart light bulb
6540381, Oct 20 1995 Spectral light tube
6541800, Feb 22 2001 Akron Brass Company High power LED
6548967, Aug 26 1997 PHILIPS LIGHTING NORTH AMERICA CORPORATION Universal lighting network methods and systems
6568834, Mar 04 1999 GOEKEN GROUP CORP Omnidirectional lighting device
6577072, Dec 14 1999 Takion Co., Ltd. Power supply and LED lamp device
6577080, Aug 26 1997 PHILIPS LIGHTING NORTH AMERICA CORPORATION Lighting entertainment system
6577794, Sep 27 1999 Compound optical and electrical conductors, and connectors therefor
6582103, Dec 12 1996 Innolux Corporation Lighting apparatus
6585393, Oct 09 1998 Satco Products, Inc. Modular accent light fixture
6608453, Aug 26 1997 PHILIPS LIGHTING NORTH AMERICA CORPORATION Methods and apparatus for controlling devices in a networked lighting system
6609813, Nov 24 1998 SIGNIFY NORTH AMERICA CORPORATION Housing and mounting system for a strip lighting device
6612729, Mar 16 2000 3M Innovative Properties Company Illumination device
6621222, May 29 2002 Power-saving lamp
6624597, Aug 26 1997 PHILIPS LIGHTING NORTH AMERICA CORPORATION Systems and methods for providing illumination in machine vision systems
6682205, Apr 16 2002 Flexible rod light and manufacturing method thereof
6712486, Oct 19 1999 DIAMOND CREEK CAPITAL, LLC Mounting arrangement for light emitting diodes
6717376, Aug 26 1997 PHILIPS LIGHTING NORTH AMERICA CORPORATION Automotive information systems
6720745, Aug 26 1997 PHILIPS LIGHTING NORTH AMERICA CORPORATION Data delivery track
6736525, May 13 2002 EPISTAR CORPORATION Energy efficient tubular light
6762562, Nov 19 2002 SIGNIFY HOLDING B V Tubular housing with light emitting diodes
6768047, Jun 13 2002 Koninklijke Philips Electronics N.V. Autonomous solid state lighting system
6774584, Aug 26 1997 PHILIPS LIGHTING NORTH AMERICA CORPORATION Methods and apparatus for sensor responsive illumination of liquids
6777891, Aug 26 1997 PHILIPS LIGHTING NORTH AMERICA CORPORATION Methods and apparatus for controlling devices in a networked lighting system
6781329, Aug 26 1997 PHILIPS LIGHTING NORTH AMERICA CORPORATION Methods and apparatus for illumination of liquids
6788011, Aug 26 1997 SIGNIFY NORTH AMERICA CORPORATION Multicolored LED lighting method and apparatus
6796680, Jan 28 2000 PHILIPS LIGHTING NORTH AMERICA CORPORATION Strip lighting
6806659, Aug 26 1997 PHILIPS LIGHTING NORTH AMERICA CORPORATION Multicolored LED lighting method and apparatus
6853151, Nov 19 2002 SIGNIFY HOLDING B V LED retrofit lamp
6869204, Aug 26 1997 SIGNIFY NORTH AMERICA CORPORATION Light fixtures for illumination of liquids
6888322, Aug 26 1997 SIGNIFY NORTH AMERICA CORPORATION Systems and methods for color changing device and enclosure
6897624, Aug 26 1997 PHILIPS LIGHTING NORTH AMERICA CORPORATION Packaged information systems
6936978, Aug 26 1997 SIGNIFY NORTH AMERICA CORPORATION Methods and apparatus for remotely controlled illumination of liquids
6953261, Feb 25 2000 NORTH AMERICAN LIGHTING, INC Reflector apparatus for a tubular light source
6965205, Aug 26 1997 PHILIPS LIGHTING NORTH AMERICA CORPORATION Light emitting diode based products
6967448, Dec 17 1997 PHILIPS LIGHTING NORTH AMERICA CORPORATION Methods and apparatus for controlling illumination
6975079, Aug 26 1997 PHILIPS LIGHTING NORTH AMERICA CORPORATION Systems and methods for controlling illumination sources
7014336, Nov 18 1999 SIGNIFY NORTH AMERICA CORPORATION Systems and methods for generating and modulating illumination conditions
7031920, Aug 26 1997 PHILIPS LIGHTING NORTH AMERICA CORPORATION Lighting control using speech recognition
7038398, Aug 26 1997 PHILIPS LIGHTING NORTH AMERICA CORPORATION Kinetic illumination system and methods
7049761, Feb 11 2000 Ilumisys, Inc Light tube and power supply circuit
7064498, Aug 26 1997 PHILIPS LIGHTING NORTH AMERICA CORPORATION Light-emitting diode based products
7102902, Feb 17 2005 Ledtronics, Inc. Dimmer circuit for LED
7113541, Aug 26 1997 Philips Solid-State Lighting Solutions, Inc Method for software driven generation of multiple simultaneous high speed pulse width modulated signals
7120560, Apr 16 1997 LIGHTRONICS Lamp monitoring and control system and method
7132785, Nov 18 1999 SIGNIFY NORTH AMERICA CORPORATION Illumination system housing multiple LEDs and provided with corresponding conversion material
7132804, Dec 17 1997 PHILIPS LIGHTING NORTH AMERICA CORPORATION Data delivery track
7135824, Dec 24 1997 PHILIPS LIGHTING NORTH AMERICA CORPORATION Systems and methods for controlling illumination sources
7139617, Jul 14 1999 SIGNIFY NORTH AMERICA CORPORATION Systems and methods for authoring lighting sequences
7161311, Aug 26 1997 PHILIPS LIGHTING NORTH AMERICA CORPORATION Multicolored LED lighting method and apparatus
7161313, Aug 26 1997 PHILIPS LIGHTING NORTH AMERICA CORPORATION Light emitting diode based products
7180252, Dec 17 1997 SIGNIFY HOLDING B V Geometric panel lighting apparatus and methods
7186003, Aug 26 1997 PHILIPS LIGHTING NORTH AMERICA CORPORATION Light-emitting diode based products
7187141, Aug 26 1997 PHILIPS LIGHTING NORTH AMERICA CORPORATION Methods and apparatus for illumination of liquids
7221104, Aug 26 1997 PHILIPS LIGHTING NORTH AMERICA CORPORATION Linear lighting apparatus and methods
7231060, Aug 26 1997 SIGNIFY NORTH AMERICA CORPORATION Systems and methods of generating control signals
7233831, Jul 14 1999 SIGNIFY NORTH AMERICA CORPORATION Systems and methods for controlling programmable lighting systems
7242152, Aug 26 1997 PHILIPS LIGHTING NORTH AMERICA CORPORATION Systems and methods of controlling light systems
7248239, Dec 17 1997 SIGNIFY NORTH AMERICA CORPORATION Systems and methods for color changing device and enclosure
7253566, Aug 26 1997 PHILIPS LIGHTING NORTH AMERICA CORPORATION Methods and apparatus for controlling devices in a networked lighting system
7255457, Nov 18 1999 SIGNIFY NORTH AMERICA CORPORATION Methods and apparatus for generating and modulating illumination conditions
7274160, Aug 26 1997 PHILIPS LIGHTING NORTH AMERICA CORPORATION Multicolored lighting method and apparatus
7308296, Aug 26 1997 PHILIPS LIGHTING NORTH AMERICA CORPORATION Precision illumination methods and systems
7309965, Aug 26 1997 PHILIPS LIGHTING NORTH AMERICA CORPORATION Universal lighting network methods and systems
7344278, Feb 22 2006 RETROFIT OOD Luminaire with reflector of adjustable rotation
7350936, Nov 18 1999 SIGNIFY NORTH AMERICA CORPORATION Conventionally-shaped light bulbs employing white LEDs
7353071, Jul 14 1999 SIGNIFY NORTH AMERICA CORPORATION Method and apparatus for authoring and playing back lighting sequences
7385359, Aug 26 1997 PHILIPS LIGHTING NORTH AMERICA CORPORATION Information systems
7401935, Sep 17 1999 LITECUBES LLC Beverage accessory devices
7427840, Aug 26 1997 PHILIPS LIGHTING NORTH AMERICA CORPORATION Methods and apparatus for controlling illumination
7510299, Feb 11 2000 Ilumisys, Inc LED lighting device for replacing fluorescent tubes
7598686, Dec 17 1997 PHILIPS LIGHTING NORTH AMERICA CORPORATION Organic light emitting diode methods and apparatus
7600907, Aug 08 2007 Ledtech Electronics Corp. LED lighting device
8093823, Feb 11 2000 Ilumisys, Inc Light sources incorporating light emitting diodes
8247985, Feb 11 2000 Ilumisys, Inc Light tube and power supply circuit
8382327, Feb 11 2000 Ilumisys, Inc Light tube and power supply circuit
20010033488,
20020011801,
20020047569,
20020047628,
20020048169,
20020048174,
20020057061,
20020070688,
20020074559,
20020074958,
20020078221,
20020101197,
20020113555,
20020130627,
20020152045,
20020153851,
20020158583,
20020163316,
20020171365,
20020171377,
20020171378,
20020176259,
20030011538,
20030057884,
20030057886,
20030057887,
20030057890,
20030076281,
20030100837,
20030133292,
20030137258,
20030222587,
20040052076,
20040085219,
20040090191,
20040105261,
20040145490,
20040155609,
20040178751,
20040212320,
20040212993,
20040240890,
20040257007,
20050030744,
20050041161,
20050041424,
20050043907,
20050044617,
20050047132,
20050047134,
20050062440,
20050063194,
20050099317,
20050151489,
20050166634,
20050174473,
20050184667,
20050236998,
20050285547,
20060012987,
20060016960,
20060050509,
20060109649,
20060152172,
20060285325,
20070030683,
20070047227,
20070086754,
20070086912,
20070115658,
20070115665,
20070188427,
20070195526,
20070258240,
20080012506,
20110109454,
119797,
125312,
D268134, May 23 1978 Luminaire
D293723, Jul 02 1984 Lampshade
D354360, Mar 15 1994 Moriyama Sangyo Kabushiki Kaisha Decorative lamp
D376030, Dec 14 1995 Artcraft of Montreal Ltd. Glass dome for lighting fixture
D422737, Jun 16 1999 Quoizel, Inc. Pendant light
D437947, Oct 14 1999 Shining Blick Enterprises Co., Ltd. Lamp shield
84763,
DE19624087,
DE19651140,
DE29817609,
DE29900320,
EP91172,
EP124924,
EP174699,
EP197602,
EP359329,
EP390262,
EP403011,
EP432848,
EP458408,
EP525876,
EP578302,
EP632511,
EP714556,
EP889283,
GB2215024,
GB2324901,
JP11135274,
JP11162234,
JP11260125,
JP5102530,
JP62248271,
JP654103,
JP7249467,
JP7264036,
JP8162677,
RE36030, Jan 08 1993 Intermatic Incorporated Electric distributing system
RE42161, Jun 27 1996 WELLS, III, CHARLES, TEE Power supply for light emitting diode array
WO1067,
WO9906759,
WO9910867,
WO9931560,
WO9945312,
WO9957945,
/
Executed onAssignorAssigneeConveyanceFrameReelDoc
Feb 26 2013iLumisys, Inc.(assignment on the face of the patent)
Date Maintenance Fee Events


Date Maintenance Schedule
May 06 20174 years fee payment window open
Nov 06 20176 months grace period start (w surcharge)
May 06 2018patent expiry (for year 4)
May 06 20202 years to revive unintentionally abandoned end. (for year 4)
May 06 20218 years fee payment window open
Nov 06 20216 months grace period start (w surcharge)
May 06 2022patent expiry (for year 8)
May 06 20242 years to revive unintentionally abandoned end. (for year 8)
May 06 202512 years fee payment window open
Nov 06 20256 months grace period start (w surcharge)
May 06 2026patent expiry (for year 12)
May 06 20282 years to revive unintentionally abandoned end. (for year 12)