LED keyboard backlight module with IC chip
By introducing light guide plate modules and flexible circuit board modules with IC chips into the RGB keyboard backlight module, the effect of reducing the number of LEDs and driving lines is achieved, solving the problems of high costs and high power consumption in the existing technology, and improving the Yield and luminous brightness and simplify the production process.
Patent Information
- Application Number
- CN202411365744.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-29
- Publication Date
- 2024-12-20
AI Technical Summary
The existing RGB keyboard backlight module requires a large number of LED lights and drive modules, resulting in high cost, large power consumption, and heavy volume, which cannot meet personalized needs.
Design an LED keyboard backlight module with its own IC chip, including a light guide plate module, a flexible circuit board module and an LED module. The RGB effect is achieved by emitting light on the side of the light guide plate, reducing the number of LEDs, and decomposing the module into independent modules to simplify Production.
Reduces the number of LEDs and the demand for driving lines, reduces cost and power consumption, reduces volume and weight, improves yield and luminous brightness, and simplifies the production process.
Smart Images
Figure CN119170441A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of backlight modules, in particular to an LED keyboard backlight module with an IC chip. Background Art
[0002] With people's demand for personalized backlit keyboards, single white light can no longer meet customer needs. RGB colorful backlit keyboards are sought after by consumers for their unique backlight colors. RGB keyboards display different colors on the keyboard by mounting RGB LEDs. The principle is to place LED lights behind each key. These LED lights emit different red, green and blue lights through circuit boards and controllers, and adjust the brightness and combination of the three colors to achieve various color effects. However, this type of keyboard notebook requires hundreds of LEDs and a driver module to drive the RGB dimming effect, which is not only costly, power-intensive, but also thick and heavy. Summary of the invention
[0003] In view of the shortcomings of the prior art, the present invention provides an LED keyboard backlight module with its own IC chip, which solves the problem that the existing RGB backlight module requires a large number of LEDs and a driving module to drive the RGB dimming effect, which not only increases the cost and power consumption, but also increases the volume and weight.
[0004] To achieve the above object, the present invention provides the following technical solutions: an LED keyboard backlight module with an IC chip, comprising a light guide plate module, a flexible circuit board module and an LED module, wherein a plurality of the LED modules are mounted on the flexible circuit board module, and the flexible circuit board module is mounted on the bottom of the light guide plate module;
[0005] The light guide plate module includes a light guide plate located in the middle, a light shading film is arranged on the top of the light guide plate, a reflective film is arranged on the bottom of the light guide plate, the light guide plate, the light shading film and the reflective film are pressed together, a lamp groove corresponding to the LED module is opened at the bottom of the light guide plate, a perforation corresponding to the LED module is opened at the bottom of the reflective film, and the light-emitting end of the LED module is movably extended into the lamp groove.
[0006] Preferably, the LED module comprises an aluminum substrate, an RGB chip and an IC chip are arranged on the top of the aluminum substrate, and a transparent colloid encapsulating the RGB chip and the IC chip is packaged on the top of the aluminum substrate.
[0007] Preferably, the number of the RGB chips is 3, namely, an RGB blue chip, an RGB green chip and an RGB red chip, and the positive and negative electrodes of the RGB blue chip, the RGB green chip and the RGB red chip are electrically connected to the aluminum substrate and the IC chip respectively.
[0008] Preferably, a bracket is fixedly connected to the bottom of the aluminum substrate, one of the electrodes of the aluminum substrate is connected to the RGB chip through a welding wire, and the other electrode passes through the bracket.
[0009] Preferably, the bottom of the bracket is fixed to the flexible circuit board module by solder paste, and the flexible circuit board module is fixed to the bottom of the light guide plate module by double-sided tape.
[0010] Preferably, the length of the flexible circuit board module is the same as that of the light guide plate module, a row of LED modules is arranged on the flexible circuit board module along its length direction, and the number of LED modules arranged on the flexible circuit board module is 27.
[0011] Preferably, laser dots are provided at the bottom of the light guide plate.
[0012] Preferably, the top of the light-shielding film is covered with a release film.
[0013] The production process of the backlight module includes: LED process, FPC process, LPG process, LED mounting FPC and LGP mounting FPCA, among which,
[0014] LED process includes: aluminum substrate opening → RGB chip, IC chip bonding → wire bonding → glue dispensing → die cutting → light splitting → taping;
[0015] The FPC process includes: cutting → drilling → etching → developing → copper plating → dry film pasting → covering film pasting → target punching → silk screen printing → surface treatment → silk screen text → electrical testing → molding;
[0016] The LGP process includes: laser dots on light guide plate → light shielding film → reflective film → lamination;
[0017] LED FPC mounting includes: whole board printing solder paste → whole board mounting LED and components by SMT machine → testing → whole board mounting adhesive tape → laser depaneling;
[0018] LGP mounting FPCA includes: using a special mounting fixture to locate the corresponding positioning holes, mounting the FPC with double-sided tape on the back of the LGP, and completely embedding the LED into the LGP light guide plate lamp slot.
[0019] Compared with the prior art, the present invention provides an LED keyboard backlight module with a built-in IC chip, which has the following beneficial effects:
[0020] 1. By setting up the light guide plate module and LED module, the light is emitted from the side of the light guide plate under the keyboard, and a row of LED lights guide light from the side to the bottom of the entire keyboard, so that the back of the keys on the entire keyboard are illuminated, so that it can achieve the same RGB colorful effect, thereby reducing the number of LEDs required for the RGB backlight module, and achieving the purpose of eliminating the control board of the drive circuit board, which not only reduces the cost and power consumption, but also reduces the size and weight, making it light and fashionable.
[0021] 2. The side-lighting effect produced by the light guide plate reduces the number of LED lamps used, from 100 lamps to 27 lamps now. The cost of LED raw materials is reduced by nearly three-quarters, and the yield is increased by nearly four times. Moreover, after the number of LED lamps is reduced, the overall power is smaller, the heat generation is lower, and it is more conducive to computer heat dissipation.
[0022] 3. By setting up the light guide plate module, flexible circuit board module and LED module, the RGB backlight module is divided into three independent modules. Each module is produced separately and then assembled. The final assembly process is simple and can speed up the production speed of the RGB backlight module.
[0023] 4. By setting the laser dots, the laser dots on the light guide plate directly form concave dots on the light guide plate, which can increase the light transmittance of the light guide plate and improve the luminous brightness of the backlight module. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:
[0025] Figure 1 A stacking diagram of the backlight module of the present invention;
[0026] Figure 2 It is a schematic diagram of the structure of the flexible circuit board module and the LED module of the present invention;
[0027] Figure 3 It is a partial cross-sectional view of the LED module of the present invention.
[0028] In the figure: 100, light guide plate module; 101, light guide plate; 102, shading film; 103, reflective film; 200, flexible circuit board module; 300, LED module; 301, aluminum substrate; 302, RGB chip; 303, IC chip; 304, transparent colloid; 400, bracket; 500, release film. DETAILED DESCRIPTION
[0029] The following will describe the implementation methods of the present application in detail with the help of accompanying drawings and examples, so that the implementation process of how the present application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.
[0030] The existing RGB backlight module is realized by placing LED lights behind each key of the keyboard. This method requires a large number of LED lights. In order to reduce the number of LED lights used in the RGB backlight module, Figure 1-Figure 3 As an embodiment of the present invention, an LED module 300 is provided on a flexible circuit board module 200, the flexible circuit board module 200 is provided on the bottom of a light guide plate module 100, the light guide plate module 100 includes a light guide plate 101 located in the middle, a light shielding film 102 is provided on the top of the light guide plate 101, a reflective film 103 is provided on the bottom of the light guide plate 101, the light guide plate 101, the light shielding film 102 and the reflective film 103 are pressed together, a lamp trough corresponding to the LED module 300 is provided at the bottom of the light guide plate 101, a perforation corresponding to the LED module 300 is provided at the bottom of the reflective film 103, the light emitting end of the LED module 300 is movably extended into the lamp trough, the LED module 300 includes an aluminum substrate 301, and the aluminum substrate An RGB chip 302 and an IC chip 303 are arranged on the top of 301. A transparent colloid 304 that wraps the RGB chip 302 and the IC chip 303 is encapsulated on the top of the aluminum substrate 301. The IC chip 303 with a specific small volume is encapsulated with the RGB chip 302 as a whole, mounted on the flexible circuit board module 200, and then emitted from the side of the keyboard through the light guide plate 101. A row of LED lights guide light from the side to the bottom of the entire keyboard, so that the backs of the keys on the entire keyboard are illuminated, so that the same RGB colorful effect is achieved, thereby reducing the number of LEDs required for the RGB backlight module, and achieving the purpose of eliminating the control board of the drive circuit board, which not only reduces the cost and power consumption, but also reduces the volume and weight, and is light and fashionable.
[0031] In order to achieve different lighting effects, the number of RGB chips 302 is 3, namely, RGB blue chip, RGB green chip and RGB red chip. The positive and negative electrodes of the RGB blue chip, RGB green chip and RGB red chip are electrically connected to the aluminum substrate 301 and the IC chip 303 respectively. The length of the flexible circuit board module 200 is the same as the length of the light guide plate module 100. A row of LED modules 300 are arranged on the flexible circuit board module 200 along its length direction. The number of LED modules 300 arranged on the flexible circuit board module 200 is 27. When in use, the IC chip 303 controls the RGB chip 302 to emit light. By adjusting the brightness and combination of the RGB blue chip, RGB green chip and RGB red chip, different colors of light effects are achieved. Due to the reduction in the number of LED lamps used, from the original 100 lamps to the current 27 lamps, the cost of LED raw materials has been reduced by nearly 3 / 4, and the yield has also increased by nearly 4 times. Moreover, after the number of LED lamps is reduced, the overall power is smaller, the heat generation is lower, and it is more conducive to computer heat dissipation.
[0032] In order to better complete the installation and protection of the backlight module, the bottom of the aluminum substrate 301 is fixedly connected with a bracket 400, one of the electrodes of the aluminum substrate 301 is connected to the RGB chip 302 through a welding wire, and the other electrode runs through the bracket 400. The bottom of the bracket 400 is fixed to the flexible circuit board module 200 through solder paste, and the flexible circuit board module 200 is fixed to the bottom of the light guide plate module 100 through double-sided tape. The top of the light shielding film 102 is covered with a release film 500. During installation, the production of the light guide plate module 100, the flexible circuit board module 200 and the LED module 300 is completed separately, and then the flexible circuit board module 200 is installed on the bottom of the light guide plate module 100. Solder paste is printed on the whole board 200, and the LED module 300 is mounted on the flexible circuit board module 200 by using a placement machine. Then, a special placement fixture is used to locate the corresponding positioning holes, and the flexible circuit board module 200 with double-sided tape is mounted on the bottom of the light guide plate module 100. The LED module 300 is completely embedded in the lamp groove of the light guide plate 101, and the release film 500 is covered on the top of the light guide plate module 100 for protection. The installation of the backlight module is completed, and the RGB backlight module is divided into three independent modules. Each module is produced separately, and then assembled. The final assembly process is simple, which can speed up the production speed of the RGB backlight module.
[0033] The bottom of the light guide plate 101 is provided with laser dots, and the laser dots on the light guide plate 101 directly form concave dots on the light guide plate, which can increase the light transmittance of the light guide plate 101 and improve the luminous brightness of the backlight module.
[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. An LED keyboard backlight module with built-in IC chip, characterized in that: It comprises a light guide plate module (100), a flexible circuit board module (200) and an LED module (300), wherein a plurality of the LED modules (300) are mounted on the flexible circuit board module (200), and the flexible circuit board module (200) is mounted on the bottom of the light guide plate module (100); The light guide plate module (100) comprises a light guide plate (101) located in the middle, a light shielding film (102) is arranged on the top of the light guide plate (101), a reflective film (103) is arranged on the bottom of the light guide plate (101), the light guide plate (101), the light shielding film (102) and the reflective film (103) are pressed together, a lamp trough corresponding to the LED module (300) is provided at the bottom of the light guide plate (101), a through hole corresponding to the LED module (300) is provided at the bottom of the reflective film (103), and a light emitting end of the LED module (300) is movably extended into the lamp trough.
2. The LED keyboard backlight module with built-in IC chip according to claim 1, characterized in that: The LED module (300) comprises an aluminum substrate (301), an RGB chip (302) and an IC chip (303) are arranged on the top of the aluminum substrate (301), and a transparent colloid (304) encapsulating the RGB chip (302) and the IC chip (303) is packaged on the top of the aluminum substrate (301).
3. The LED keyboard backlight module with built-in IC chip according to claim 2, characterized in that: The number of the RGB chips (302) is three, namely an RGB blue chip, an RGB green chip and an RGB red chip, and the positive and negative electrodes of the RGB blue chip, the RGB green chip and the RGB red chip are electrically connected to the aluminum substrate (301) and the IC chip (303) respectively.
4. The LED keyboard backlight module with built-in IC chip according to claim 2, characterized in that: The bottom of the aluminum substrate (301) is fixedly connected to a bracket (400), one of the electrodes of the aluminum substrate (301) is connected to the RGB chip (302) via a welding wire, and the other electrode passes through the bracket (400).
5. The LED keyboard backlight module with built-in IC chip according to claim 4, characterized in that: The bottom of the bracket (400) is fixed to the flexible circuit board module (200) by means of solder paste, and the flexible circuit board module (200) is fixed to the bottom of the light guide plate module (100) by means of double-sided adhesive.
6. The LED keyboard backlight module with built-in IC chip according to claim 1, characterized in that: The length of the flexible circuit board module (200) is the same as that of the light guide plate module (100); a row of LED modules (300) is arranged on the flexible circuit board module (200) along its length direction; and the number of LED modules (300) arranged on the flexible circuit board module (200) is 27.
7. The LED keyboard backlight module with built-in IC chip according to claim 1, characterized in that: The bottom of the light guide plate (101) is provided with laser dots.
8. The LED keyboard backlight module with built-in IC chip according to claim 1, characterized in that: The top of the light shielding film (102) is covered with a release film (500).