A side-in backlight with high brightness uniformity

Abstract

The utility model belongs to the technical field of backlight, especially a high brightness uniformity side -in backlight, including the casing, the front fixed mounting of casing has the diffusion plate, the inner wall lower surface of casing is seted up the clamping slot, the inside of clamping slot is provided with the light guide plate, the back of light guide plate is seted up the light guide groove, the inner wall fixed mounting of casing has the light -reflecting plate, the both sides fixed mounting of casing has the protective housing. LED lamp group starts, linear arrangement's LED lamp group is along the light guide plate long side single row distribution, through the spacing of LED lamp group and light guide plate thickness, can avoid producing the dark area, makes the light guide plate reach the light guide even effect, prevents the light guide plate light guide range to be affected, and the LED lamp group of millimeter light emitting diode can ensure single point brightness high and luminous angle controllable, can effectively control luminous angle, promote the backlight brightness, and the light guide groove of V type can accurate control light refraction direction, guarantee the backlight high brightness uniformity.

Description

Technical Field

[0001] This utility model belongs to the field of side-lit backlight technology, specifically relating to a side-lit backlight with high brightness uniformity. Background Technology

[0002] A backlight is a light source located behind a liquid crystal display (LCD). Its light emission directly affects the visual effect of the liquid crystal display module (LCM). The LCD itself does not emit light; it displays graphics or is the result of light modulation. Therefore, the selection of the light source is crucial in backlight design. The chosen light source determines the backlight's power consumption, brightness, color, and other photoelectric parameters, as well as its operating conditions and lifespan. The core technology in the backlight module is the optical technology of the light guide plate, but the corresponding mold technology challenges can only be overcome by a few large manufacturers. A backlight mainly consists of a light source, a light guide plate, optical modules, and structural components. Currently, edge-lit backlights generally use LEDs for illumination, which cannot control the emission angle, easily leading to uneven backlight brightness and low brightness, affecting the backlight's performance. Therefore, a high-brightness, uniform edge-lit backlight is needed. Utility Model Content

[0003] To address the problems mentioned in the background art, this utility model provides a side-lit backlight with high brightness uniformity. This solves the problem that current side-lit backlights generally use LEDs for illumination, which cannot control the angle of light emission, easily leading to uneven backlight brightness, resulting in low backlight brightness and affecting the use of the backlight.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a side-lit backlight with high brightness uniformity, comprising a housing, a diffuser plate fixedly installed on the front of the housing, a slot formed on the lower surface of the inner wall of the housing, a light guide plate disposed inside the slot, a light guide groove formed on the back of the light guide plate, a reflector fixedly installed on the inner wall of the housing, protective shells fixedly installed on both sides of the housing, a circuit board fixedly connected to the inner wall of the protective shell, an LED light group electrically connected to the surface of the circuit board, a cover plate provided on the upper surface of the housing, a protective baffle fixedly installed at the bottom of the cover plate, and bolts threadedly connected to the upper surface of the cover plate.

[0005] Preferably, the light guide groove is V-shaped, and the reflector is located on one side of the light guide plate.

[0006] Preferably, the LED light group is linearly arranged, and the LED light group is a sub-millimeter light-emitting diode.

[0007] Preferably, the surface of the protective baffle is provided with a sealing gasket.

[0008] Preferably, the cover plate is connected to the housing by bolts, and the number of bolts is four.

[0009] Preferably, a storage shell is fixedly installed on the back of the housing, and a servo motor is fixedly installed on one side of the storage shell. The output end of the servo motor is connected to a heat dissipation fan.

[0010] Preferably, the front side of the housing has heat dissipation holes, and there are several heat dissipation holes.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] When the LED light assembly is activated, the linearly arranged LEDs are distributed in a single row along the long side of the light guide plate. By adjusting the spacing of the LEDs and the thickness of the light guide plate, dark areas can be avoided, ensuring uniform light distribution and preventing the light guide plate from being affected. Furthermore, the sub-millimeter LED light assembly ensures high single-point brightness and controllable emission angle, effectively controlling the emission angle and improving backlight brightness. The V-shaped light guide groove can precisely control the direction of light refraction, ensuring high brightness uniformity of the backlight. Attached Figure Description

[0013] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0014] Figure 1 This is a first three-dimensional structural diagram of the present invention;

[0015] Figure 2 This is a second three-dimensional structural diagram of the present invention;

[0016] Figure 3 This is a first perspective sectional view of the housing of this utility model;

[0017] Figure 4 This is a second perspective sectional view of the shell of this utility model;

[0018] Figure 5 This is a three-dimensional structural diagram of the cover plate of this utility model;

[0019] Figure 6 This is a three-dimensional structural diagram of the heat dissipation fan blade of this utility model.

[0020] In the diagram: 1. Housing; 2. Diffuser plate; 3. Slot; 4. Light guide plate; 5. Light guide groove; 6. Reflector; 7. Protective shell; 8. Circuit board; 9. LED light group; 10. Cover plate; 11. Protective baffle; 12. Bolt; 13. Heat dissipation hole; 14. Storage shell; 15. Servo motor; 16. Cooling fan blades. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1-6 The present invention provides the following technical solution: a side-lit backlight with high brightness and uniformity, comprising a housing 1, a diffuser plate 2 fixedly installed on the front of the housing 1, a slot 3 opened on the lower surface of the inner wall of the housing 1, a light guide plate 4 disposed inside the slot 3, a light guide groove 5 opened on the back of the light guide plate 4, a reflector plate 6 fixedly installed on the inner wall of the housing 1, protective shells 7 fixedly installed on both sides of the housing 1, a circuit board 8 fixedly connected to the inner wall of the protective shell 7, an LED lamp group 9 electrically connected to the surface of the circuit board 8, a cover plate 10 disposed on the upper surface of the housing 9, a protective baffle 11 fixedly installed at the bottom of the cover plate 10, and a bolt 12 threadedly connected to the upper surface of the cover plate 10.

[0023] The cover plate 10 is installed onto the housing 1 using bolts 12. The top part of the light guide plate 4 is inserted into the protective baffle 11, which protects the light guide plate 4. During use, the LED light group 9 is activated. The linearly arranged LED light group 9 is distributed in a single row along the long side of the light guide plate 4. Through the spacing of the LED light group 4 and the thickness of the light guide plate 4, dark areas can be avoided, ensuring uniform light guiding and preventing the light guiding range of the light guide plate 4 from being affected. Furthermore, the sub-millimeter LED light group 9 can ensure high single-point brightness and controllable light emission angle, effectively controlling the light emission angle, improving the backlight brightness, and ensuring high backlight performance. The backlight has uniform brightness, and the V-shaped light guide groove 5 can precisely control the direction of light refraction, ensuring high brightness uniformity. The reflector 6 can reflect light onto the surface of the light guide plate 4. After the servo motor 15 is started, it can drive the heat dissipation fan blade 16 inside the housing 14 to rotate. After the heat dissipation fan blade 16 rotates, it can dissipate heat from the backlight inside the housing 1, carrying away the heat generated by the backlight and dissipating it through the heat dissipation hole 13. All electrical equipment in this device is powered by an external power supply. The motor, circuit board, LED light group, etc. of this utility model are all controlled by a PLC automatic control system.

[0024] In one aspect of this embodiment, the linearly arranged LED light groups 9 are distributed in a single row along the long side of the light guide plate 4. By using the spacing of the LED light groups 9 and the thickness of the light guide plate 4, dark areas can be avoided, preventing the light guiding range of the light guide plate 4 from being affected. Furthermore, the sub-millimeter light-emitting diode LED light groups 9 can ensure high single-point brightness and controllable light emission angle, which can effectively improve the backlight brightness and prevent uneven backlight brightness.

[0025] In one aspect of this embodiment, a V-shaped light guide groove 5 is used to provide a good light guiding effect for the light guide plate 4, precisely control the direction of light refraction, and allow the light to be accurately diffused through the diffuser plate 2. The reflector plate 6 can reflect the light onto the surface of the light guide plate 4.

[0026] In one aspect of this embodiment, after loosening the bolts 12 on the cover plate 10, the cover plate 10 can be disassembled and installed from the housing 1, which facilitates the maintenance of the light guide plate 4.

[0027] In one aspect of this embodiment, the sealing gasket on the surface of the protective baffle 11 is used to protect the light guide plate 4 and prevent the protective baffle 11 from abrading the light guide plate 4.

[0028] In one aspect of this embodiment, after the servo motor 15 is started, the servo motor 15 can drive the heat dissipation fan blade 16 inside the housing 14 to rotate. After the heat dissipation fan blade 16 rotates, it can dissipate heat from the backlight inside the housing 1, carrying away the heat generated by the backlight and dissipating it through the heat dissipation hole 13.

[0029] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A side-lit backlight with high brightness uniformity, comprising a housing (1), characterized in that: A diffuser plate (2) is fixedly installed on the front of the housing (1). A slot (3) is provided on the lower surface of the inner wall of the housing (1). A light guide plate (4) is provided inside the slot (3). A light guide groove (5) is provided on the back of the light guide plate (4). A reflector plate (6) is fixedly installed on the inner wall of the housing (1). A protective shell (7) is fixedly installed on both sides of the housing (1). A circuit board (8) is fixedly connected to the inner wall of the protective shell (7). An LED light group (9) is electrically connected to the surface of the circuit board (8). A cover plate (10) is provided on the upper surface of the housing (9). A protective baffle (11) is fixedly installed at the bottom of the cover plate (10). A bolt (12) is threadedly connected to the upper surface of the cover plate (10).

2. A side-lit backlight with high brightness uniformity according to claim 1, characterized in that: The light guide groove (5) is V-shaped, and the reflector (6) is located on one side of the light guide plate (4).

3. A side-lit backlight with high brightness uniformity according to claim 1, characterized in that: The LED light group (9) is linearly arranged, and the LED light group (9) is a sub-millimeter light-emitting diode.

4. A side-lit backlight with high brightness uniformity according to claim 1, characterized in that: The surface of the protective baffle (11) is provided with a sealing gasket.

5. A side-lit backlight with high brightness uniformity according to claim 1, characterized in that: The cover plate (10) is connected to the housing (1) by bolts (12), and the number of bolts (12) is four.

6. A side-lit backlight with high brightness uniformity according to claim 1, characterized in that: A storage shell (14) is fixedly installed on the back of the housing (1), and a servo motor (15) is fixedly installed on one side of the storage shell (14). The output end of the servo motor (15) is connected to a heat dissipation fan blade (16).

7. A side-lit backlight with high brightness uniformity according to claim 1, characterized in that: The front of the housing (1) is provided with heat dissipation holes (13), and there are several heat dissipation holes (13).

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