A vehicle interior component and lighting assembly that includes a vehicle interior component having a fabric disposed over a substrate or foam layer, or both. An electroluminescent panel is located between the fabric and substrate/foam layer and directs light from the panel through the fabric. In this way, the light source can be effectively hidden when not in use and can be incorporated into the interior component in a manner that requires little space. The vehicle interior component can be any of a number of different interior articles, including, for example, a headliner, door panel, vehicle seat, rear deck, sun visor, and trunk panel. Also disclosed are vehicle interior illumination systems using touch switches and electroluminescent panels to provide back lighting of the switch and/or vehicle interior illumination through the switch.
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27. A vehicle carpet, comprising:
a substrate;
a carpet pile attached to said substrate; and
an electroluminescent panel mounted underneath said carpet pile, with said electroluminescent panel being configured to direct light from said panel through said carpet pile.
1. A vehicle interior component assembly for providing interior vehicle illumination, comprising:
a vehicle interior component having a substrate and a fabric disposed over said substrate covering; and
an electroluminescent panel disposed between said fabric and substrate covering, with said electroluminescent panel being configured to direct light from said panel through said fabric covering.
15. A vehicle interior component assembly for providing interior vehicle illumination, comprising:
a vehicle interior component having a foam layer and a fabric disposed over said foam layer; and
an electroluminescent panel disposed between said fabric and foam layer, with said electroluminescent panel being configured to direct light from said panel through said fabric.
0. 30. A vehicle interior component assembly for providing interior vehicle illumination, comprising:
a vehicle interior component having a substrate and a foam layer disposed over said substrate wherein said substrate includes a recessed portion facing said foam layer; and
an electroluminescent panel disposed in said recessed portion with said electroluminescent panel being configured to direct light through said foam layer.
0. 41. A vehicle interior component assembly for providing illumination to an interior of a vehicle, comprising:
a vehicle interior component having a substrate and a lining disposed over said substrate wherein said vehicle interior component includes a recessed portion for facing the interior of the vehicle;
a plurality of electroluminescent panels disposed in said recessed portion; and
controller coupled to each of said plurality of electroluminescent panels and operative to operate said plurality of electroluminescent panels.
0. 35. A vehicle, comprising:
a vehicle body defining an interior and including a headliner comprising a laminate having an interior surface facing said interior;
an electroluminescent illumination source immovably fixed to said laminate below said interior surface, the electroluminescent illumination source comprising a plurality of electroluminescent panels in spaced relation to one another; and
a controller coupled to each of said plurality of electroluminescent panels and operative to operate said plurality of electroluminescent panels.
0. 31. A headliner for providing illumination to an interior of a vehicle, comprising:
a laminate having an interior surface for facing the interior of the vehicle;
an electroluminescent illumination source immovably fixed to said laminate below said interior surface, the electroluminescent illumination source comprising a plurality of electroluminescent panels in spaced relation to one another; and
a controller coupled to each of said plurality of electroluminescent panels and operative to operate said plurality of electroluminescent panels.
0. 36. A vehicle, comprising:
a vehicle body defining an interior having a plurality of seating positions;
a headliner disposed above said plurality of seating positions;
an electroluminescent illumination source incorporated into said headliner and extending across said plurality of seating positions to illuminate each of said plurality of seating positions, the electroluminescent illumination source comprising a plurality of electroluminescent panels in spaced relation to one another; and
a controller coupled to each of said plurality of electroluminescent panels and operative to operate said plurality of electroluminescent panels.
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28. A vehicle carpet as defined in
0. 29. A instrument panel assembly for a vehicle, comprising:
an instrument panel having a lower surface that faces towards a floor area of the vehicle when installed within the vehicle, said lower surface having a light-transmitting region; and
an electroluminescent panel mounted within said instrument panel behind said lower surface at said light-transmitting region, with said electroluminescent panel being configured to direct light from said panel through said light-transmitting region of said lower surface.
0. 32. A headliner as defined in
0. 33. A headliner as defined in
0. 34. A headliner as defined in
0. 37. A vehicle as defined in
0. 38. A vehicle as defined in
0. 39. A vehicle as defined in
0. 40. A vehicle as defined in
0. 42. A vehicle interior component assembly as defined in
0. 43. A vehicle interior component assembly as defined in
0. 44. A vehicle interior component assembly as defined in
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This application claims the priority of U.S. Provisional Patent Application No. 60/185,349, filed Feb. 26, 2000.
This invention relates to interior vehicle lighting systems and lighted switch assemblies used for automotive applications.
Interior lighting systems for automotive and other vehicle applications are generally used for two purposes. One is to provide general area illumination and the other is feature lighting of specific objects, either for aesthetic or functional reasons. Traditionally, these interior lighting systems have utilized incandescent lamps for both area and feature lighting, often using lenses to control the shape and light intensity distribution of the emitted light. Although incandescent lamp systems can often be integrated into various vehicle interior trim components in a simple manner, various considerations do arise which complicates their use for automotive lighting. For example, where heat from the lamp could damage adjacent components or otherwise cause problems, thermal management of that heat must be implemented. Also, there is often little room in or behind a particular vehicle interior body panel or trim component for the lamp, socket, and lensing.
This constraint on space behind the vehicle panels can be especially true with vehicle headliners where there may be little room between the headliner and roof of the vehicle. For headliners, the solution has typically been to either require more room between the headliner and roof or to utilize a light assembly that protrudes downwardly from the headliner for a short distance. Where sufficient space is available, various functional components such as electrical conduits, lamp soffits, electrical connectors, HVAC ducts, flat speakers, and head airbags can be molded into the headliner during its manufacture. See, for example, European Patent Application EP 0979760, published Feb. 16, 2000. However, where the headliner thickness is to be kept to a minimum, the use of molded-in lamp soffits may not be practical.
The use of alternative light sources, such as electroluminescent panels, has been proposed for a wide range of vehicle lighting applications. For example, U.S. Pat. No. 4,864,473 to Tokarz et al. discloses an electroluminescent panel dome lamp designed for a convertible-type automobile. The panel is mounted on a housing that is attached to the headliner of the convertible's roof. U.S. Pat. No. 5,013,967 to Hirotaka et al. discloses a detachable electroluminescent panel light source that can be located at various places about the inside of a vehicle to provide illumination. These locations include inside the trunk, at the glove compartment, and on the backside of the front seats. U.S. Pat. No. 5,564,813 to Curtindale discloses a sun visor that includes incandescent light sources to provide courtesy, reading, and vanity illumination. The patent states that electroluminescent lighting strips could be used in place of the incandescent lamps. However, while various automotive lighting uses of electroluminescent panels have been proposed, as exemplified by these patents, much of the prior art discloses the use of electroluminescent panels as a direct substitute for incandescent and/or LED lamps without taking full advantage of the unique structural features of the electroluminescent technology.
Accordingly, it is a general object of the invention to provide a vehicle interior lighting system that can be used to provide area or feature fighting in a manner that minimizes the aesthetic impact of the light source when not in use and that requires negligible space behind the interior body panel or trim component where the light source is located.
The present invention is directed to various interior vehicle assemblies that provide illumination using electroluminescent panels. In accordance with one aspect, the present invention is directed to a vehicle interior component assembly that includes a vehicle interior component having a fabric disposed over either a substrate or foam layer (or both). An electroluminescent panel is located between the fabric and substrate (or foam layer) and is configured to direct light from the panel through the fabric. In this way, the light source can be effectively hidden when not in use and an be incorporated into the interior component in a manner that requires little, if any, space behind the interior component. The vehicle interior component can be any of a number of different interior articles, including, for example, a headliner, door panel, vehicle seat, rear deck, sun visor, and trunk panel.
In accordance with another aspect of the invention, there is provided a vehicle carpet utilizing an electroluminescent panel, with the carpet including a substrate and a carpet pile attached to the substrate. The electroluminescent panel is mounted underneath the carpet pile and is configured to direct light from the panel through the carpet pile. A vehicle carpet so constructed can be used as a floor mat or as installed floor carpet.
In accordance with another aspect of the invention, there is provided a vehicle instrument panel utilizing an electroluminescent panel to provide downwardly-directed light. The instrument panel includes a lower surface that faces towards a floor area of the vehicle when installed, with the lower surface having a light-transmitting region. The electroluminescent panel is mounted within the instrument panel behind the lower surface at the light-transmitting region, and electroluminescent panel is configured to direct light from the panel through the light-transmitting region of the lower surface.
In accordance with yet another aspect of the invention, there is provided a vehicle interior illumination system that includes a light source, a switch assembly, and an electronic circuit for energizing the light source. The switch assembly includes at least one light-transmissive touch switch and an electroluminescent panel that is located behind the touch switch to provide back lighting of the touch switch upon energization by the electronic circuit. The electronic circuit is connected to the light source, touch switch, and electroluminescent panel, and is operable upon activation of the switch to energize the light source and to change energization of the electroluminescent panel.
In accordance with another aspect of the invention, there is provided a vehicle interior lighting and switch assembly, comprising a light-transmissive touch switch, a. light source disposed behind the touch switch, and an electronic circuit connected to both the touch switch and light source. The light source comprises an electroluminescent panel and the circuit is operable upon activation of the touch switch to energize the electroluminescent panel to thereby provide area illumination through the touch switch. A vehicle lighting and switch assembly constructed in this manner can be used for dome lights and map lights within the vehicle.
Preferred exemplary embodiments of the invention will hereinafter be described in conjunction with the appended drawings, wherein like designations denote like elements, and wherein:
Referring to
To provide general area illumination at each of the four main occupant seats of a typical automotive sedan, headliner 10 includes four electroluminescent panels 12 that are spaced within headliner 10 at locations corresponding to the main occupant seats. As shown in the schematic of
As is also known by those skilled in the art, the electroluminescent panels 12 are substantially flat panels that can be formed into a variety of shapes and sizes. They are energized by suitable operating power from controller 16. The construction and use of such panels is also well known and therefore no further explanation of their construction or operation is necessary.
Referring now to
As shown in the embodiment of
Referring to
An advantage of the embodiments of
As will be appreciated, by using one or more of the electroluminescent panels 12 in the headliner, mood, ambiance, reading, and general cab lighting can be provided using a light source that occupies essentially no space. Also, as shown in
More specifically, as shown in
As shown in
Turning now to
The electronic circuit 70 of
Although shown symbolically as a conventional incandescent lamp, light source 74 can of course be an electroluminescent panel itself. More generally, light source 74 can instead be some other electronically-actuated device, such as a motor or solenoid, in which case its corresponding touch switch 64 can be any of the various function switches used in the vehicle, including door lock switches, window switches, etc.
Turning now to
It will thus be apparent that there has been provided in accordance with the present invention several vehicle interior lighting systems and lighted switch assemblies which achieve the aims and advantages specified herein. It will of course be understood that the foregoing description is of preferred exemplary embodiments of the invention and that the invention is not limited to the specific embodiments shown. Various changes and modifications will become apparent to those skilled in the art. For example, the two-layer switch/light assembly shown in
Anderson, James Burr, Brown, John Christopher
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