The present invention relates to a camera module, the camera module including a pcb (Printed circuit Board) formed with an image sensor, a holder formed at an upper surface of the pcb and mounted therein with at least one or more lenses, an actuator positioned at the holder, and an electronic circuit pattern layer formed on the holder.
|
1. A camera module, the camera module comprising:
a pcb (Printed circuit Board);
an image sensor disposed on the pcb;
a housing including a base disposed at an upper surface of the pcb,
a holder disposed at an upper surface of the base and mounted with at least one lens;
an actuator disposed at the holder; and
an electronic circuit pattern layer formed on a surface of the housing, and connected to a terminal of the actuator and a terminal of the pcb,
wherein the holder is integrally formed with the base, and
wherein the housing is nonconductive, and includes an impurity for changing a portion exposed to heat or light in order to form the electronic circuit pattern layer.
2. The camera module of
3. The camera module of
4. The camera module of
5. The camera module of
a conductive layer of conductive material disposed on a surface of the electronic circuit pattern layer,
wherein the conductive layer has a shape corresponding to the electronic circuit pattern layer, and
wherein power and a control signal are received through the conductive layer or the electronic circuit pattern layer.
6. The camera module of
7. The camera module of
8. The camera module of
9. The camera module of
10. The camera module of
11. The camera module of
12. The camera module of
13. The camera module of
14. The camera module of
15. The camera module of
16. The camera module of
17. The camera module of
18. The camera module of
19. The camera module of
wherein one of the electronic circuit pattern layer and the outer surface of the housing is not protruded from the other.
|
|||||||||||||||||||||||||||||||||||||
The present invention relates to a camera module.
A PCB (Printed Circuit Board) is a component connecting an electric circuit between electronic components to supply a power and a control signal. Recently, a camera module performing an auto focusing operation using an actuator has been developed, where two electrodes of an AF (Auto Focus) terminal and a PCB AF pad are conductively connected to controllably drive the actuator.
The actuator needs to receive a control signal and a power by connecting the PCB mounted with an image sensor, and to this end, a separate connection substrate functioning as a wiring is generally provided between the actuator and the PCB. However, in a case the connection substrate is separately provide as mentioned above, there is a problem in manufacturing the connection substrate and managing stock control. Another problem is that size of the camera module increases as much as volume of the connection substrate.
The present invention is disclosed to provide a camera module improved in structure by forming an electronic circuit on a surface of an electronic component when the electronic component is injection-molded and dispensing with a separate PCB.
An object of the invention is to solve at least one or more of the above problems and/or disadvantages in whole or in part and to provide at least the advantages described hereinafter. In order to achieve at least the above objects, in whole or in part, and in accordance with the purpose of the invention, as embodied and broadly described, and in one general aspect of the present invention, there is provided a camera module, the camera module comprising: a PCB (Printed Circuit Board) formed with an image sensor; a holder formed at an upper surface of the PCB and mounted therein with at least one or more lenses; an actuator positioned at the holder; and an electronic circuit pattern layer formed on the holder.
Preferably, but not necessarily, the electronic circuit pattern layer is connected to a terminal of the PCB.
Preferably, but not necessarily, the electronic circuit pattern layer is connected to a terminal of the actuator.
Preferably, but not necessarily, the electronic circuit pattern layer is connected to the terminal of the actuator and the terminal of the PCB.
Preferably, but not necessarily, the electronic circuit pattern layer is formed only on one side of the holder.
Preferably, but not necessarily, the electronic circuit pattern layer is formed on an outside and an inside of the holder.
Preferably, but not necessarily, the electronic circuit pattern layer is further formed at an upper side thereof with a conductive layer stacked with conductive materials.
Preferably, but not necessarily, the conductive layer is formed at the upper side of the electronic circuit pattern layer using any one technical engineering of coating and plating.
Preferably, but not necessarily, the electronic circuit pattern layer is directly mounted with electronic components.
Preferably, but not necessarily, the actuator is formed with at least two or more connection terminals.
Preferably, but not necessarily, one of the connection terminals is connected to a positive terminal and the other of the connection terminals is connected to a ground terminal.
Preferably, but not necessarily, the connection terminals are conductively connected to the electronic circuit pattern layer by way of any one method of soldering, wire bonding and AG epoxy bonding.
Preferably, but not necessarily, the connection terminals are conductively and directly connected to the electronic circuit pattern layer.
Preferably, but not necessarily, the terminal of the PCB is conductively connected to the electronic circuit pattern layer by way of any one method of soldering, wire bonding and AG epoxy bonding.
Preferably, but not necessarily, the terminal of the PCB is conductively and directly connected to the electronic circuit pattern layer.
Preferably, but not necessarily, the actuator performs any one of auto focusing function, hand-shake prevention function, shutter function and zooming function.
Preferably, but not necessarily, the actuator is formed with one of an optical diaphragm on an optical path of the lenses and a liquid crystal micro lens, wherein either the optical diaphragm on an optical path of the lenses or the liquid crystal micro lens adjusts refraction of light passing the lenses to focus an image captured by the image sensor.
Preferably, but not necessarily, the actuator is formed with any one of a non-MEMS actuator including a MEMS actuator, a liquid crystal lens and a piezo polymer lens, a silicon type actuator and a liquid lens.
Preferably, but not necessarily, the holder is integrally formed with a base arranged at the upper surface of the PCB.
Preferably, but not necessarily, the holder is a cylindrical camera unit formed at an upper surface of the base, where a diameter of the holder at a portion arranged with a lens with a larger diameter and a diameter of the holder at a portion arranged with a relatively smaller diameter are differently formed.
Preferably, but not necessarily, the holder is formed with a constant diameter toward the upper surface of the base.
In another aspect of the present invention, there is provided a camera module, comprising: a PCB (Printed Circuit Board) formed with an image sensor; a holder formed at an upper surface of the PCB and mounted therein with at least one or more lenses; and an actuator positioned at the holder to focus an image captured by the image sensor using the at least one lens, wherein the actuator and the PCB are connected through an electronic circuit pattern layer formed at the holder.
The camera module according to the present invention has an advantageous effect in that an electronic circuit can be formed on a surface of an injection-molded electronic component in the same method as that of formation of an electronic circuit pattern layer on the surface of the electronic component to form a circuit on a PCB, whereby the electronic components can be manufactured at a more reasonable price.
Another advantage is that a reduced difficulty in manufacturing process enables manufacturing of a product with a constant level of reliability regardless of skill of an operator, whereby a processing cost can be reduced.
The teachings of the present invention can be readily understood by considering the following detailed description in conjunction with the accompanying drawings, in which:
The following description is not intended to limit the invention to the form disclosed herein. Consequently, variations and modifications commensurate with the following teachings, and skill and knowledge of the relevant art are within the scope of the present invention. The embodiments described herein are further intended to explain modes known of practicing the invention and to enable others skilled in the art to utilize the invention in such, or other embodiments and with various modifications required by the particular application(s) or use(s) of the present invention.
The disclosed embodiments and advantages thereof are best understood by referring to
Meanwhile, the terminology used herein is for the purpose of describing particular implementations only and is not intended to be limiting of the invention. That is, as used herein, the singular forms “a”, “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It will be further understood that the terms “including”, “includes”, “having”, “has”, “with”, or variants thereof are used in the detailed description and/or the claims to denote non-exhaustive inclusion in a manner similar to the term “comprising”.
Also, “exemplary” is merely meant to mean an example, rather than the best. If is also to be appreciated that features, layers and/or elements depicted herein are illustrated with particular dimensions and/or orientations relative to one another for purposes of simplicity and ease of understanding, and that the actual dimensions and/or orientations may differ substantially from that illustrated.
As may be used herein, the terms “substantially” and “approximately” provide an industry-accepted tolerance for its corresponding term and/or relativity between items. Such an industry-accepted tolerance ranges from less than one percent to ten percent and corresponds to, but is not limited to, component values, angles, et cetera.
That is, in the drawings, the size and relative sizes of layers, regions and/or other elements may be exaggerated or reduced for clarity. Like numbers refer to like elements throughout and explanations that duplicate one another will be omitted.
Now, a camera module according to the present invention will be described in detail with reference to the accompanying drawings.
Referring to
The PCB (10) may be provided with a plurality of terminals and mounted at an approximate center of the PCB (10) with an image sensor. The PCB (10) is connected to the actuator (200) via the electronic circuit pattern layer (110) formed on a surface of holder (100). Although not illustrated, an image sensor and various electronic components are formed on the surface of the PCB (10). The PCB (10) may be formed by using FR-4 (woven glass and epoxy), FR-5 (woven glass and epoxy) and ceramic materials. The PCB (10) may be provided with a terminal for connecting to the actuator (200). The terminal is preferably connected to the electronic circuit pattern layer (110) using soldering, but the connection method is not limited thereto and may be connected by wire bonding, AG epoxy bonding or direct connection.
The base (20) may be injection-molded with resin material such as plastic, and formed with an infrared cut-off filter on a surface opposite to the image sensor. The holder (100) is arranged at an upper surface of the base (20) and may be installed therein with at least one sheet of lens. The holder (20), as illustrated in
The holder (100) is formed with at least two cylinders each having a different diameter, the configuration of which is made in consideration of sizes of diameters based on difference of magnification of lens mounted inside the holder (100).
As noted above, if the holder (100) is configured to have different diameters in consideration of diameters of lenses mounted thereinside, thickness of the holder (100) can be equally controlled when the holder (100) is injection molded. If thickness of a part is not equally configured, resin may not be introduced into a mold when the thickness is suddenly thinned, and when thickness of a part is suddenly thickened, resin is not fully supplied to the mold at a thickened portion to result in failure of normal injection of the thickened portion, such that it is preferable that the thickness of each part be equally formed if possible. It is also preferable that the holder (100) be provided with a plurality of cylinders each having a different diameter in consideration of each diameter of embedded plurality of lenses.
However, it should be noted that the shape of holder (100) is not limited to being formed with the multi-staged cylinders. Where necessary, the holder (100) may alternatively or selectively take the shape of a multi-staged rectangular shape or a multi-staged polygonal shape. In addition, the holder (100) may take the shape of a round pillar or a square pillar each having a predetermined diameter or a predetermined width.
According to an exemplary embodiment of the present invention, as illustrated in
The actuator (200) may be positioned at the holder (100) to add a focus adjusting function of the camera module, and arranged at an upper surface of the holder (100) as shown in
The actuator (200) may take various shapes depending on necessity thereof. For example, the actuator (200) may be formed in any one type of piezo/polymer lenses, optical diaphragms, liquid crystal micro lenses, MEMS actuator, MEMS piezo actuator, MEMS bimorphactuator, MEMS thermal actuator, MEMS magnetic actuator, MEMS liquid actuator, non-MEMS type actuator, silicone type actuator and liquid lenses. Furthermore, combination of these types may also alternatively replace the actuator (200). The actuator (200) may use at least one lens to perform auto focusing function, hand shake prevention function, shutter function and zooming function of an image captured by the image sensor.
Meanwhile, the actuator (200) is provided with at least two connection terminals that can be connected to a plus terminal and a ground terminal, where the connection terminals (121) are preferably connected to an electronic circuit pattern layer (100) via soldering, wire bonding or Ag epoxy method.
With reference to
The actuator (200) is susceptible to influences by an axial alignment and trembling of the lens, such that the actuator (200) needs to be firmly fixed to the holder (100), and the connection terminals are preferably connected by way of soldering or wire bonding.
Signal exchange with the actuator (200) is performed through the electronic circuit pattern layer (110) or the conductive layer (120), such that the cumbersomeness of using a complicated wiring, manufacturing of a separate PCB or FPCB for signal exchange and mounting same to the holder (100) can be eliminated to enable a reasonable cost of manufacturing of product.
Meanwhile, the technique of forming the electronic circuit pattern layer (100) is generally called an MID (Molded Interconnect Device) technology, where the MID technology is largely divided into three types.
First, a 2S method is provided such that a portion forming the holder (100) and a portion forming the electronic circuit pattern layer (110) are respectively injection molded with a different synthetic resin material, where the holder (100) is injection molded with an insulation material, while the portion forming the electronic circuit pattern layer (110) is formed with conductive synthetic resin, or formed with synthetic resin that can be easily gold-plated, and injection molded. After the holder (100) is injection molded, the electronic circuit pattern layer (110) is completed using a subsequent process such as a plating process.
Second, an LDS (Laser Direct Structuring) method is provided such that the holder (100) included with impurities reacting to light and heat is injection molded, the injection molded holder (100) is formed with a wiring pattern where the electronic circuit pattern layer (110) is to be formed through a surface patterning process such as a laser exposing method.
That is,
With continuing reference to
The impurities (101) may be changed to a state capable of electrically conducting the physical properties of the exposed portion of the holder (100), or to a state of physical properties easy to be plated or coated, if not electrically conducted. The composition or exposing process of the impurities (101) is a known art, such that no further details will be omitted herefrom as less related to the subject matter of the present invention.
Referring to
In a case the electronic circuit pattern layer (110) is formed, the layer (110) can be forthrightly mounted with an SMD (Surface Mounted Part) or an accessorial electronic part, because the electronic circuit pattern layer (110) itself has a conductible physical property. Preferably, a conductible metal layer (220) is further stacked on the surface of the electronic circuit pattern layer (110) using a metal material. That is, the electronic circuit pattern layer (110) may be formed by being plated with a metal material, or by being coated with a conductible material.
Meanwhile, MIPTEC (Microscopic Integrated Processing Technology) method may be provided as another MID technology. The MIPTEC is a method in which patterning is effected by etching a non-circuit portion after front metallizing. That is, an entire surface of the holder (100) is metallized, portions except for a portion to be formed with an electronic circuit pattern layer (110) are etched to integrally form the electronic circuit pattern layer (110) with the holder (100).
Meanwhile, the electronic circuit pattern layer (110) provided by the MID technology may be formed on one side of the surface of the holder (100), if necessary, and may be formed on an exposed surface at the outside and a non-exposure surface at the inside. This is to select an alignment of the electronic circuit pattern layer (110) by way of a single surface or both surfaces depending on a degree that needs a wiring for parts mounting.
Therefore, if it is necessary to mount many electronic parts, a front surface of the holder (100) and a rear surface as well are formed with the electronic circuit pattern layer (110) using the MID technology, on which electronic parts can be mounted.
As noted from the foregoing, if the electronic circuit pattern layer (110) is formed on the surface of the holder (100), a mounting space can be advantageously reduced that needs parts mounting when a miniaturized electronic product is manufactured.
Although not illustrated, in addition to the camera module according to the exemplary embodiment of the present invention, an injection molded body of an electronic product using a PCB may be integrally formed with an electronic circuit. In this case, a circuit pattern formed on the injection molded body can be directly aligned and coupled with SMDs or electronic parts. If the electronic parts are configured thus described, separate PCB manufacturing or processing can be dispensed with, such that disadvantages of coupling a PCB to a body of electronic parts and of wiring process can be eliminated to reduce the number of parts and the manufacturing cost.
The previous description of the disclosure is provided to enable any person skilled in the art to make or use the disclosure. Various modifications to the disclosure will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other variations without departing from the spirit or scope of the disclosure. Thus, the disclosure is not intended to be limited to the examples and a design described herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
The camera module according to the present invention has an industrial applicability in that it can be applied to a camera module having various types of focus-adjusting devices, and a conductible circuit pattern can be formed on a part surface to be mounted with many parts, instead of a separate circuit forming member such as a PCB, to enable realization of a reduced number of parts and miniaturization of a product.
| Patent | Priority | Assignee | Title |
| 10375280, | Jul 18 2014 | FUJI CORPORATION | Imaging device with improved heat dissipation including a board section between a first and a second housing |
| D842152, | Oct 12 2017 | Telsonic Holding AG | Sensor holder |
| Patent | Priority | Assignee | Title |
| 5986218, | Nov 08 1995 | Mitsubishi Denki Kabushiki Kaisha | Circuit board with conductor layer for increased breakdown voltage |
| 20030168499, | |||
| 20040132491, | |||
| 20060280493, | |||
| 20090213232, | |||
| 20100158508, | |||
| 20110085072, | |||
| EP1890180, | |||
| JP360186, | |||
| KR1020040077057, | |||
| WO2010129454, | |||
| WO2011008443, |
| Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
| May 17 2012 | LG Innotek Co., Ltd. | (assignment on the face of the patent) | / | |||
| Nov 15 2013 | HAN, KWANGJOON | LG INNOTEK CO , LTD | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 031633 | /0085 |
| Date | Maintenance Fee Events |
| Jul 15 2016 | ASPN: Payor Number Assigned. |
| Jul 10 2019 | M1551: Payment of Maintenance Fee, 4th Year, Large Entity. |
| Jul 17 2023 | M1552: Payment of Maintenance Fee, 8th Year, Large Entity. |
| Date | Maintenance Schedule |
| Feb 23 2019 | 4 years fee payment window open |
| Aug 23 2019 | 6 months grace period start (w surcharge) |
| Feb 23 2020 | patent expiry (for year 4) |
| Feb 23 2022 | 2 years to revive unintentionally abandoned end. (for year 4) |
| Feb 23 2023 | 8 years fee payment window open |
| Aug 23 2023 | 6 months grace period start (w surcharge) |
| Feb 23 2024 | patent expiry (for year 8) |
| Feb 23 2026 | 2 years to revive unintentionally abandoned end. (for year 8) |
| Feb 23 2027 | 12 years fee payment window open |
| Aug 23 2027 | 6 months grace period start (w surcharge) |
| Feb 23 2028 | patent expiry (for year 12) |
| Feb 23 2030 | 2 years to revive unintentionally abandoned end. (for year 12) |