Backlight structure of motorcycle instrument screen

Abstract

The utility model discloses a backlight structure of a motorcycle instrument screen, which avoids local overheating, improves backlight brightness of a liquid crystal display (LCD), can design different numbers of light-emitting diode (LED) lamps according to the size of the screen, and meets the requirements of light uniformization and brightness improvement. The backlight structure of the motorcycle instrument screen comprises a shell, a liquid crystal display screen, a diffusion film and a circuit board. A reflecting cover is arranged in the shell, and a plurality of heat dissipation holes are formed in the reflecting cover; the diffusion film and the liquid crystal display screen are arranged at the opening of the front face of the reflecting cover, and the diffusion film is attached to the back face of the liquid crystal display screen. The circuit board is assembled on the back face of the shell, and a plurality of LED lamps are evenly arranged in the area, located in the reflecting cover, of the circuit board.

Description

Technical Field

[0001] The utility model relates to the technical field of motorcycle instruments, in particular to a backlight structure of a motorcycle instrument screen. Background Art

[0002] In existing motorcycle instruments, acrylic plates are usually used as light guide plates, and LED lights are placed on the side of the light guide plates. The light guide plates are illuminated by side lighting to increase the backlight brightness of the LCD in the instrument. The technical defects are:

[0003] (1) LED lights generate heat when working, causing local overheating of the light guide plate, which in turn causes local deformation and shortens the product life;

[0004] (2) The side of the light guide plate has high brightness because it is closer to the LED light, while the middle position has low brightness because it is farther away, resulting in uneven brightness of the light guide plate as a whole;

[0005] (3) The space for placing LED lights on the side of the light guide plate is limited, resulting in a limited number of LED lights, low total brightness, and poor visibility in outdoor sunlight. Utility Model Content

[0006] The purpose of the utility model is to provide a backlight structure for a motorcycle instrument screen, which solves the problems existing in the prior art, avoids local overheating, improves the backlight brightness of the LCD, and can design different numbers of LED lights according to the size of the screen to meet the needs of even light distribution and improved brightness.

[0007] In order to achieve the above objectives, the solution of the present invention is:

[0008] A backlight structure for a motorcycle instrument screen comprises a housing, a liquid crystal display, a diffusion film, and a circuit board. A reflector is disposed within the housing and is provided with a plurality of heat dissipation holes. The diffusion film and liquid crystal display are both disposed at the front opening of the reflector, and the diffusion film is attached to the back of the liquid crystal display. The circuit board is mounted on the back of the housing, and a plurality of LED lights are evenly arranged in the area of ​​the circuit board located within the reflector.

[0009] The side surface of the reflector includes four inclined surfaces, and the LED lights are arranged in a matrix distribution manner on a surface of the circuit board facing the diffusion film.

[0010] Preferably, on the surface of the circuit board, the distance between vertically adjacent or horizontally adjacent LED lamps is in the range of 10-20 mm, and the distance between the circuit board and the diffusion film is in the range of 12-25 mm.

[0011] The periphery of the opening of the reflector is provided with a step for assembling the liquid crystal display screen.

[0012] Preferably, a plurality of buckles for fixing the liquid crystal display screen are provided around the step.

[0013] The housing and the circuit board are relatively fixed by means of a snap connection.

[0014] The housing is provided with a plurality of mounting grooves at positions on both sides of the reflector.

[0015] After adopting the above technical solution, the utility model has the following technical effects:

[0016] The utility model closely adheres a diffusion film to the back of the liquid crystal display screen. After the LED lamp emits light, it reflects the light onto the surface of the diffusion film through the reflector, and the light is evenly dispersed by the diffusion film, making the backlight of the liquid crystal display screen more uniform. In addition, the specification design of the reflector is synchronized with the size of the liquid crystal display screen. The larger the liquid crystal display screen, the larger the space inside the reflector, and the more LED lamps can be designed. It is possible to distribute different numbers of LED lamps according to the screen size and display area, and then control the brightness of the LED lamp by changing the power supply current, so that the instrument has better visibility in outdoor sunlight. In addition, the heat dissipation holes of the reflector provide the heat dissipation design required by the structure to avoid overheating in the reflector. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A perspective view of a specific embodiment of the present utility model;

[0018] Figure 2 This is an exploded view of a specific embodiment of the present utility model;

[0019] Figure 3 A cross-sectional view of a specific embodiment of the present utility model;

[0020] Description of Figure Numbers:

[0021] 1-housing; 11-reflector; 111-heat dissipation hole; 112-inclined surface; 12-step; 121-clip; 13-mounting slot; 2-LCD display; 3-diffusion film; 4-circuit board; 41-LED lamp. DETAILED DESCRIPTION

[0022] In order to further explain the technical solution of the present invention, the present invention will be described in detail below through specific embodiments.

[0023] refer to Figure 1-3 As shown, the utility model discloses a backlight structure for a motorcycle instrument screen, comprising a housing 1, a liquid crystal display (LCD) 2, a diffusion film 3 and a circuit board 4;

[0024] A reflector 11 is provided in the housing 1 and a plurality of heat dissipation holes 111 are provided on the reflector 11;

[0025] The diffusion film 3 and the liquid crystal display screen 2 are both arranged at the front opening of the reflector 11, and the diffusion film 3 is attached to the back side of the liquid crystal display screen 2 (i.e. the side facing the reflector 11);

[0026] The circuit board 4 is mounted on the back of the housing 1 , and a plurality of LED lights 41 are evenly arranged on the area of ​​the circuit board 4 located inside the reflector 11 .

[0027] Through the above scheme, the present invention closely adheres a layer of diffusion film 3 to the back of the liquid crystal display screen 2. After emitting light, the LED lamp 41 will reflect the light to the surface of the diffusion film 3 through the reflector 11, and the light will be evenly dispersed by the diffusion film 3, so that the backlight of the liquid crystal display screen 2 is more uniform; and the specification design of the reflector 11 is synchronized with the size of the liquid crystal display screen 2. The larger the liquid crystal display screen 2, the larger the space inside the reflector 11, and the more LED lamps 41 can be designed. It is possible to distribute different numbers of LED lamps 41 according to the screen size and display area, and then control the brightness of the LED lamp 41 by changing the power supply current, so that the instrument has better visibility in outdoor sunlight; in addition, the heat dissipation holes 111 of the reflector 11 provide the heat dissipation design required by the structure to avoid overheating in the reflector 11.

[0028] Specific embodiments of the present invention are shown below.

[0029] The side surface of the reflector 11 includes four inclined surfaces 112 to match the rectangular parallelepiped shape of the LCD screen 2 in a conventional design; the LED lights 41 are arranged in a matrix distribution on the side of the circuit board 4 facing the diffusion film 3.

[0030] Furthermore, on the surface of the circuit board 4, the spacing between the longitudinally adjacent or transversely adjacent LED lights 41 is in the range of 10 to 20 mm, and the spacing between the circuit board 4 and the diffusion film 3 is in the range of 12 to 25 mm. Within this parameter range, a better light uniformity effect can be ensured without overheating.

[0031] A step 12 for assembling the liquid crystal display screen 2 is provided around the opening of the reflector 11 .

[0032] Furthermore, a number of buckles 121 for fixing the liquid crystal display screen 2 are provided around the step 12 .

[0033] The housing 1 and the circuit board 4 are relatively fixed by means of a snap connection.

[0034] The housing 1 is provided with a plurality of mounting slots 13 on both sides of the reflector 11 for mounting instrument buttons and other accessories.

[0035] The above embodiments and drawings do not limit the product form and style of the present invention. Any appropriate changes or modifications made by ordinary technicians in the relevant technical field should be deemed to be within the patent scope of the present invention.

Claims

1. A backlight structure for a motorcycle instrument screen, characterized by: Including housing, LCD screen, diffusion film and circuit board; A reflector is provided in the housing, and a plurality of heat dissipation holes are provided on the reflector; The diffusion film and the liquid crystal display screen are both arranged at the front opening of the reflector, and the diffusion film is attached to the back of the liquid crystal display screen; The circuit board is assembled on the back side of the housing, and a plurality of LED lights are evenly arranged on the area of ​​the circuit board located inside the reflector.

2. The backlight structure for a motorcycle instrument screen according to claim 1, characterized in that: The side surface of the reflector includes four inclined surfaces, and the LED lights are arranged in a matrix distribution manner on a surface of the circuit board facing the diffusion film.

3. The backlight structure of a motorcycle instrument screen according to claim 2, characterized in that: On the surface of the circuit board, the distance between vertically adjacent or horizontally adjacent LED lights is in the range of 10-20 mm, and the distance between the circuit board and the diffusion film is in the range of 12-25 mm.

4. The backlight structure for a motorcycle instrument screen according to claim 1, wherein: The periphery of the opening of the reflector is provided with a step for assembling the liquid crystal display screen.

5. The backlight structure of a motorcycle instrument screen according to claim 4, characterized in that: A number of buckles for fixing the liquid crystal display are arranged around the step.

6. The backlight structure for a motorcycle instrument screen according to claim 1, characterized in that: The housing and the circuit board are relatively fixed by means of a snap connection.

7. The backlight structure for a motorcycle instrument screen according to claim 1, characterized in that: The housing is provided with a plurality of mounting grooves at positions on both sides of the reflector.

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