CN213483268U

CN213483268U - Backlight module with high uniformity

Info

Publication number: CN213483268U
Application number: CN202021532127.5U
Authority: CN
Inventors: 黄华达
Original assignee: GUANGDONG DONGGUAN TONGHUA DISPLAY Ltd
Current assignee: GUANGDONG DONGGUAN TONGHUA DISPLAY Ltd
Priority date: 2020-07-29
Filing date: 2020-07-29
Publication date: 2021-06-18
Anticipated expiration: 2030-07-29

Abstract

The utility model discloses a backlight module with high uniformity, which comprises a light guide plate, wherein a lamp groove is arranged at the side of the light guide plate, and an LED lamp is arranged in the lamp groove; the lamp trough is provided with an arc light-emitting side wall for the LED lamp to scatter light rays out of the light guide area and form an arc light-emitting surface; raised dots are uniformly arrayed in the light guide area on the front surface of the light guide plate. The utility model has the advantages of simple overall structure and strong reliability, improve the light-emitting degree of consistency of LED lamp light source on the light guide plate to the distribution of light trough, mesh and increase technical points such as extinction, make the degree of consistency in a poor light improve, finally make the display effect of display screen obtain improving.

Description

Backlight module with high uniformity

Technical Field

The utility model relates to a display screen technical field, especially a backlight unit of high degree of consistency.

Background

With the increasing use frequency of electronic products, people do not need to pursue functionality and demand for appearance of the products is also increasing when using display products. Common backlight structures all require a large space for placing LEDs to ensure that the brightness in the visible area of the product is relatively uniform. However, the product has a large limitation, and the current products are usually small, light and low-power, so that the space for placing the LEDs on the backlight is small and the number of the LEDs is small, and thus, the uniformity and the display effect of the display area of the backlight are sacrificed. The backlight with high uniformity can be ensured under the condition that the size of the backlight source and the number of LEDs are limited, and the diversified requirements of products and markets at present are met.

In the case that the number of the LEDs and the size of the backlight are limited, because the LED illumination angle is limited, a part of the visible area of the backlight is illuminated with less light. The brightness of the area of the film is lower than that of other areas, dark areas and lamp eyes exist in a visible area, the brightness is uneven, and the product attractiveness is seriously affected.

Therefore, based on the phenomenon, the display effect is improved under the condition of not changing the backlight size, the number of LEDs, the forward voltage and the current, and the backlight with high uniformity can be also developed under a specific condition.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is not enough to above-mentioned prior art, provide a backlight unit of high degree of consistency.

In order to solve the technical problem, the utility model discloses the technical scheme who takes is: a backlight module with high uniformity comprises a light guide plate, wherein a lamp groove is arranged at the side of the light guide plate, and an LED lamp is arranged in the lamp groove; the lamp trough is provided with an arc light-emitting side wall for the LED lamp to scatter light rays out of the light guide area and form an arc light-emitting surface; raised dots are uniformly arrayed in the light guide area on the front surface of the light guide plate.

In the technical scheme, the number of the dots in unit area, which are sequentially distributed from near to far with the arc light-emitting surface as a starting point, is gradually and uniformly increased.

In the above technical scheme, the mesh points located near the screen are distributed in a wavy or zigzag manner.

In the technical scheme, the light absorption block is arranged outside the circular arc light emergent surface in the non-light-conducting area between the lamp trough and the light-conducting area.

In the above technical scheme, the light absorption block is a black adhesive tape.

The utility model has the advantages that: the utility model discloses a backlight module with high uniformity, which comprises a light guide plate, wherein the side of the light guide plate is provided with a lamp groove, and an LED lamp is arranged in the lamp groove; the lamp trough is an arc light-emitting side wall provided with an LED lamp for scattering light rays out of a light guide area (corresponding to a display area of the display screen) and forming an arc light-emitting surface; raised dots are uniformly arrayed in the light guide area on the front surface of the light guide plate. The LED backlight module has the advantages that the whole structure is simple, the reliability is high, the light emitting uniformity of an LED lamp light source on the light guide plate is improved by the technical points of light grooves, the distribution of mesh points, light absorption increasing and the like, the backlight uniformity is improved, and finally the display effect of a display screen is improved.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is an enlarged schematic view at a of fig. 1.

Fig. 3 is an enlarged schematic view at B of fig. 2.

In the figure, 1, a light guide plate; 2. a lamp slot; 3. an LED lamp; 4. an arc light-emitting surface; 5. a mesh point; 6. salient points; 7. and a light absorption block.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1-3, a backlight module with high uniformity comprises a light guide plate 1, wherein a light groove 2 is arranged at the edge of the light guide plate 1, and an LED lamp 3 is installed in the light groove 2; the light trough 2 is an arc light-emitting side wall provided with an LED lamp 3 for scattering light rays out of a light-guiding area (corresponding to a display area of a display screen) and forming an arc light-emitting surface 4; raised dots 5 are uniformly arrayed in the light guide region on the front surface of the light guide plate 1. The effect of the dots 5 is to enhance the brightness of the light. The light-emitting side wall of the lamp groove 2 is changed from the original rectangle to the arc, which is beneficial to more uniform light scattering. The mesh points 5 are semicircular convex points. The arc light-emitting surface 4 is fully distributed with convex points 6 for scattering, and further, the light scattering is enhanced from the light-emitting surface.

Specifically, the number of the mesh points 5 in unit area, which are sequentially distributed from near to far with the arc light emitting surface 4 as a starting point, is gradually and uniformly increased. Because the light that LED lamp 3 goes out the plain noodles 4 scattering from the circular arc is radial, so from near to far away along the unit area evenly distributed quantity of radial adjustment site 5, near because site 5 is small in quantity, so do not strengthen to light luminance (because be close to the light source, light luminance itself just enough is strong), and far away because site 5 is many, strengthen to light luminance (because keep away from the light source, light luminance itself is relatively weak), so adjust the degree of consistency of light luminance. The screen dots 5 positioned nearby are distributed in a wavy or zigzag manner, so that the uniformity of light brightness is improved.

Specifically, in the non-light-conducting area (i.e., the non-visible area of the display screen) between the light trough 2 and the light-conducting area, a light-absorbing block 7 is arranged along the circular arc light-emitting surface 4. The light absorption block 7 is a black adhesive tape which is a common light absorption raw material, has low cost and good effect, and effectively weakens the light brightness close to the light source.

The above embodiments are merely illustrative and not restrictive, and all equivalent changes and modifications made by the methods described in the claims are intended to be included within the scope of the present invention.

Claims

1. The utility model provides a backlight unit of high homogeneity which characterized in that: the LED lamp comprises a light guide plate, wherein a lamp groove is formed in the side of the light guide plate, and an LED lamp is arranged in the lamp groove; the lamp trough is provided with an arc light-emitting side wall for the LED lamp to scatter light rays out of the light guide area and form an arc light-emitting surface; raised dots are uniformly arrayed in the light guide area on the front surface of the light guide plate.

2. The backlight module as claimed in claim 1, wherein: the number of the mesh points in unit area, which are sequentially distributed from near to far with the arc light-emitting surface as a starting point, is gradually and uniformly increased.

3. The backlight module as claimed in claim 2, wherein: the mesh points positioned nearby are distributed in a wave or zigzag manner.

4. A backlight module with high uniformity as set forth in claim 1 or 2, wherein: and a light absorption block is arranged outside the circular arc light emergent surface in the non-light-conducting area between the lamp trough and the light guide area.

5. The backlight module as claimed in claim 4, wherein: the light absorption block is a black adhesive tape.