A backlight structure for improving uneven brightness

Abstract

The utility model discloses a backlight structure for improving uneven brightness, comprising: a display module body, the display module body comprising a liquid crystal display screen and a backlight module, the liquid crystal display screen is accommodated in the backlight module, an LED light bar is arranged in the backlight module, the liquid crystal display screen comprises a display area and a non-display area, and the LED light bar is separated from the display area of ​​the liquid crystal display screen by a certain distance. The backlight structure has the effect of preventing the brightness of the liquid crystal display screen on the side close to the LED light bar from being brighter than other areas, and improving the uniform brightness of the liquid crystal display screen.

Description

Technical Field

[0001] The utility model relates to the technical field of backlight modules, in particular to a backlight structure for improving uneven brightness. Background Art

[0002] Liquid crystal display devices are widely used in various information, communication and consumer electronic products. The liquid crystal display module is mainly composed of a backlight module and a liquid crystal display screen. The backlight module provides brightness for the liquid crystal display screen so that the liquid crystal display screen can display various colors.

[0003] In the prior art, the backlight module is equipped with an LED light source as the main light-emitting device, and the LED light source is usually arranged on one side of the backlight module, and transmits light to the entire display screen through the light guide plate diffusion film. However, the brightness of the display screen area corresponding to the position of the LED light source will be significantly brighter than other areas, making the display screen uneven in brightness. Utility Model Content

[0004] The purpose of the utility model is to overcome the shortcomings of the prior art and provide a backlight structure that improves uneven brightness.

[0005] The purpose of this utility model is achieved through the following technical solutions:

[0006] A backlight structure for improving uneven brightness includes: a display module body, the display module body includes a liquid crystal display screen and a backlight module, the liquid crystal display screen is accommodated in the backlight module, an LED light bar is arranged in the backlight module, the liquid crystal display screen includes a display area and a non-display area, and the LED light bar is separated from the display area of ​​the liquid crystal display screen by a certain distance.

[0007] In one embodiment, the distance between the LED light strip and the display area is not less than 1.45 mm.

[0008] In one embodiment, the thickness of the LED light strip is 0.4-0.6 mm.

[0009] In one embodiment, a light guide plate is disposed in the backlight module. The light guide plate is disposed along the longitudinal direction of the backlight module. The light guide plate is located on a side of the liquid crystal display screen facing the backlight module.

[0010] In one embodiment, the light guide plate includes a light incident surface and a light emitting surface. A reflective sheet is disposed on the light incident surface of the light guide plate, and the reflective sheet is disposed along a length direction of the light guide plate.

[0011] In one embodiment, an optical film is disposed on the light emitting surface of the light guide plate, and the optical film is located on the side of the light guide plate facing the liquid crystal display screen.

[0012] In one embodiment, the longitudinal length of the light guide plate is 0.1-0.2 mm longer than the longitudinal lengths of the reflective sheet and the optical film.

[0013] In one embodiment, the LED light bar is located on the light incident surface of the light guide plate, the LED light bar is located directly below the light guide plate, and the LED light bar is arranged along the length direction of the bottom side of the backlight module.

[0014] In one embodiment, a double-sided foam adhesive is provided between the liquid crystal display screen and the backlight module for bonding.

[0015] In one embodiment, a light-shielding glue for light shielding is arranged between the liquid crystal display screen and the backlight module. The light-shielding glue is arranged along the outer circumferential direction of the liquid crystal display screen, and the light-shielding glue is flush with the lamp port of the LED light bar.

[0016] Compared with the prior art, the utility model has at least the following advantages:

[0017] The utility model discloses a backlight structure for improving uneven brightness, by setting the LED light bar at a certain distance from the display area of ​​the liquid crystal display screen and limiting the thickness of the LED light bar, so as to avoid to a certain extent the brightness of the area of ​​the liquid crystal display screen close to the LED light bar being brighter than other areas. The length of the light guide plate is longer than the lengths of the reflective sheet and the optical film, so that the light entering the liquid crystal display screen can be more uniform, and the light-shielding glue on the outer side of the liquid crystal display screen is flush with the lamp mouth of the LED light bar, so as to avoid light leakage of the liquid crystal display screen close to the LED light bar, thereby increasing the uniformity of the brightness of the liquid crystal display screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for use in the embodiments are briefly introduced below.

[0019] Figure 1 A schematic diagram of a backlight structure for improving uneven brightness provided by the utility model;

[0020] Figure 2 A front cross-sectional structural schematic diagram of a backlight structure for improving uneven brightness provided by the utility model;

[0021] Figure 3 The utility model provides a cross-sectional structural schematic diagram of a backlight structure for improving uneven brightness.

[0022] Description of the drawings: 10. Display module body; 20. Liquid crystal display screen; 21. Display area; 22. Non-display area; 30. Backlight module; 40. Light guide plate; 50. Reflective sheet; 60. Optical film; 70. LED light strip; 80. Double-sided foam adhesive; 90. Shading adhesive. DETAILED DESCRIPTION

[0023] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings.

[0024] A backlight structure for improving uneven brightness, referring to Figure 1 and Figure 2 , including a display module body 10 , the display module body 10 includes a liquid crystal display screen 20 and a backlight module 30 , and the liquid crystal display screen 20 is accommodated in the backlight module 30 .

[0025] Reference Figure 3 A light guide plate 40 is disposed in the backlight module 30 . The light guide plate 40 is disposed along the longitudinal direction of the backlight module 30 . The light guide plate 40 is located on a side of the liquid crystal display screen 20 facing the backlight module 30 .

[0026] Reference Figure 3 The light guide plate 40 includes a light incident surface and a light emitting surface. A reflective sheet 50 is disposed on the light incident surface of the light guide plate 40 . The reflective sheet 50 is disposed along the length direction of the light guide plate 40 . The reflective sheet 50 is entirely attached to one side of the light guide plate 40 .

[0027] Reference Figure 3 An optical film 60 is disposed on the light emitting surface of the light guide plate 40, and the optical film 60 is located on the side of the light guide plate 40 away from the reflective sheet 50, and the optical film 60 is located on the side of the light guide plate 40 facing the liquid crystal display screen 20. The optical film 60 includes a diffusion film, an upper brightness enhancement film, and a lower brightness enhancement film, and the diffusion film, the upper brightness enhancement film, and the lower brightness enhancement film are sequentially attached to the light emitting surface of the light guide plate 40.

[0028] Further, refer to Figure 3 The longitudinal length of the light guide plate 40 is 0.1-0.2 mm longer than the longitudinal length of the reflective sheet 50 and the optical film 60, so that the light entering the liquid crystal display screen 20 is more uniform, avoiding the situation where the brightness of one side of the liquid crystal display screen 20 is brighter.

[0029] Reference Figure 2 and Figure 3An LED light bar 70 for providing light is disposed on the light incident surface of the light guide plate 40. The LED light bar 70 is located directly below the light guide plate 40 and is disposed along the length direction of the bottom side of the backlight module 30. The LED light bar 70 is composed of a plurality of LED lights. A portion of the light emitted by the LED light bar 70 directly enters the light guide plate 40, and another portion enters the light guide plate 40 through the reflective sheet 50, and is emitted into the liquid crystal display screen 20 through the optical film 60, thereby providing light for the liquid crystal display screen 20.

[0030] Further, refer to Figure 2 and Figure 3 The thickness of the LED light strip 70 is 0.4-0.6 mm, thereby preventing light from leaking from the edge of the liquid crystal display screen 20.

[0031] Reference Figure 2 The liquid crystal display screen 20 is located on the side of the optical film 60 away from the light guide plate 40. The liquid crystal display screen 20 includes a display area 21 and a non-display area 22. The display area 21 is used for the liquid crystal display screen 20 to display images, and the non-display area 22 is the frame area of ​​the liquid crystal display screen 20 and does not display images.

[0032] Reference Figure 3 A foam double-sided adhesive 80 for bonding is arranged between the liquid crystal display screen 20 and the backlight module 30. The foam double-sided adhesive 80 is arranged along the inner circumferential direction of the backlight module 30. The foam double-sided adhesive 80 bonds and fixes the liquid crystal display screen 20 and the backlight module 30.

[0033] Reference Figure 2 When the liquid crystal display screen 20 and the backlight module 30 are assembled, the LED light bar 70 is located at the lower side of the liquid crystal display screen 20. The distance between the LED light bar 70 and the display area 21 of the liquid crystal display screen 20 is not less than 1.45 mm.

[0034] Reference Figure 3 A light-shielding glue 90 for shading is arranged between the liquid crystal display screen 20 and the backlight module 30. The light-shielding glue 90 is arranged along the outer circumferential direction of the liquid crystal display screen 20. The light-shielding glue 90 is arranged in a square shape. The light-shielding glue 90 is used to prevent light from leaking from the outer edge of the liquid crystal display screen 20.

[0035] Further, refer to Figure 3 , the light shielding glue 90 is flush with the lamp socket of the LED light strip 70.

[0036] Reference Figure 3By placing the LED light bar 70 at a certain distance from the display area 21 of the liquid crystal display screen 20 and limiting the thickness of the LED light bar 70, it is possible to avoid, to a certain extent, the brightness of the area of ​​the liquid crystal display screen 20 close to the LED light bar 70 being brighter than other areas. The length of the light guide plate 40 is longer than the lengths of the reflective sheet 50 and the optical film 60, so that the light entering the liquid crystal display screen 20 can be more uniform, and the light shielding glue 90 on the outside of the liquid crystal display screen 20 is flush with the lamp mouth of the LED light bar 70, which can avoid light leakage on the side of the liquid crystal display screen 20 close to the LED light bar 70, thereby increasing the uniformity of brightness.

[0037] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A backlight structure for improving uneven brightness, characterized in that: include: A display module body (10), the display module body (10) comprising a liquid crystal display screen (20) and a backlight module (30), the liquid crystal display screen (20) being accommodated in the backlight module (30), an LED light bar (70) being arranged in the backlight module (30), the liquid crystal display screen (20) comprising a display area (21) and a non-display area (22), the LED light bar (70) being spaced a certain distance from the display area (21) of the liquid crystal display screen (20).

2. The backlight structure for improving uneven brightness according to claim 1, characterized in that: The distance between the LED light bar (70) and the display area (21) is not less than 1.45 mm.

3. The backlight structure for improving uneven brightness according to claim 2, characterized in that: The thickness of the LED light strip (70) is 0.4-0.6 mm.

4. The backlight structure for improving uneven brightness according to claim 3, characterized in that: A light guide plate (40) is arranged in the backlight module (30), and the light guide plate (40) is arranged along the longitudinal length direction of the backlight module (30). The light guide plate (40) is located on a side of the liquid crystal display screen (20) facing the backlight module (30).

5. The backlight structure for improving uneven brightness according to claim 4, characterized in that: The light guide plate (40) comprises a light incident surface and a light emitting surface. A reflective sheet (50) is provided on the light incident surface of the light guide plate (40). The reflective sheet (50) is provided along the length direction of the light guide plate (40).

6. The backlight structure for improving uneven brightness according to claim 5, characterized in that: An optical film (60) is provided on the light emitting surface of the light guide plate (40), and the optical film (60) is located on the side of the light guide plate (40) facing the liquid crystal display screen (20).

7. The backlight structure for improving uneven brightness according to claim 6, characterized in that: The longitudinal length of the light guide plate (40) is 0.1-0.2 mm longer than the longitudinal lengths of the reflective sheet (50) and the optical film (60).

8. The backlight structure for improving uneven brightness according to claim 7, characterized in that: The LED light bar (70) is located on the light incident surface of the light guide plate (40), the LED light bar (70) is located directly below the light guide plate (40), and the LED light bar (70) is arranged along the length direction of the bottom side of the backlight module (30).

9. The backlight structure for improving uneven brightness according to claim 1, characterized in that: A foam double-sided adhesive (80) for bonding is provided between the liquid crystal display screen (20) and the backlight module (30).

10. The backlight structure for improving uneven brightness according to claim 1, characterized in that: A light shielding glue (90) for shielding light is provided between the liquid crystal display screen (20) and the backlight module (30); the light shielding glue (90) is provided along the outer circumferential direction of the liquid crystal display screen (20); the light shielding glue (90) is flush with the lamp socket of the LED light bar (70).

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