CN214795283U

CN214795283U - Light guide plate and backlight module

Info

Publication number: CN214795283U
Application number: CN202120773825.2U
Authority: CN
Inventors: 杨利平; 王祥国
Original assignee: Shenzhen City Sanbum Photoelectric Co ltd
Current assignee: Shenzhen City Sanbum Photoelectric Co ltd
Priority date: 2021-04-15
Filing date: 2021-04-15
Publication date: 2021-11-19
Anticipated expiration: 2031-04-15

Abstract

The utility model discloses a light guide plate and backlight unit, be equipped with a plurality of first beam split units and a plurality of second beam split unit on the light guide plate, the one end of light guide plate is connected with a plurality of luminescence units, a plurality of first beam split units with a plurality of second beam split units are located the light guide plate with between a plurality of luminescence units, every the luminescence unit dispose first beam split unit with the second beam split unit, a plurality of first beam split units set up in between a plurality of second beam split units, first beam split unit with it is gapped between a plurality of luminescence units. The beneficial effects of the utility model reside in that: the problem that the lamp eyes appear on the backlight module under short optical path can be effectively solved.

Description

Light guide plate and backlight module

Technical Field

The embodiment of the utility model provides a relate to backlight unit technical field, especially relate to a light guide plate and backlight unit.

Background

The light guide plate is a main component for converting a point light source or a line light source into a surface light source in the backlight module, can be used in flat display equipment such as mobile phones, liquid crystal displays, notebook computers, digital cameras and the like, and is used for providing the output of the surface light source with uniform brightness so that the flat display can normally display images. The light of the led lamp enters the light guide plate and is transmitted in the light guide plate in a total reflection manner. When light rays strike each light guide point on the light guide plate, reflected light can be diffused towards each angle and then is emitted from the front surface of the light guide plate. The light guide plate can uniformly emit light through various light guide points with different densities and sizes. The light guide plate generally requires a combination of light sources to emit light when in use.

Along with the development of mobile phone terminal technology, the screen occupation ratio of a mobile phone is increasing day by day, the light mixing Area of the backlight module is decreasing (1.8 mm), so that led light rays cannot be fully mixed after entering the light guide plate and reach a VA Area (View Area, visible Area and effective Area), the problem of eyes of the backlight module is very easy to occur, and the traditional mesh point density adjustment and the sawtooth size density adjustment cannot be solved.

SUMMERY OF THE UTILITY MODEL

In view of this, an object of the present invention is to provide a light guide plate and a backlight module, which can effectively solve the problem of the occurrence of the light hole in the backlight module under the short optical path.

In order to achieve the above object, an embodiment of the present invention provides a light guide plate, be equipped with a plurality of first beam split units and a plurality of second beam split units on the light guide plate, the one end of light guide plate is connected with a plurality of luminescence units, a plurality of first beam split units with a plurality of second beam split units are located the light guide plate with between a plurality of luminescence units, every the luminescence unit dispose with first beam split unit with the second beam split unit, a plurality of first beam split units set up in between a plurality of second beam split units, first beam split unit with gapped between the luminescence unit.

Further, the distance from the first light splitting unit to the light emitting unit is greater than the distance from the second light splitting unit to the light emitting unit.

Further, the first light splitting unit and the second light splitting unit are arc-shaped.

Further, the first light splitting units are arranged between the second light splitting units continuously or uniformly at intervals.

Further, a third light splitting unit is arranged between the light emitting units, and the third light splitting units are connected to the light guide plate.

In order to achieve the above object, an embodiment of the present invention provides a backlight module, including the light guide plate, the rubber frame and the optical film assembly as described above, the light guide plate and the optical film assembly are installed on the rubber frame.

The embodiment of the utility model provides a light guide plate and backlight unit, the light source that luminescence unit sent is through first beam split unit and second beam split unit refraction to the light guide plate in, because there is the clearance between first beam split unit and the luminescence unit, can disperse and the light that excessively concentrates before the reduction LED lamp to backlight unit has been improved and the problem that the lamp eye appears under the short optical path condition.

Drawings

Fig. 1 is a schematic structural view of a V-CUT surface of the light guide plate of the present invention.

Fig. 2 is a schematic diagram of the structure a in the light guide plate of the present invention.

Fig. 3 is a schematic structural view of the mesh surface of the light guide plate of the present invention.

Fig. 4 is a schematic view of a first structure of the first light splitting unit and the third light splitting unit of the light guide plate of the present invention.

Fig. 5 is a second structural schematic diagram of the first light splitting unit and the third light splitting unit of the light guide plate of the present invention.

Fig. 6 is a schematic structural view of the backlight module of the present invention.

Wherein, 1, a light guide plate; 2. a light emitting unit; 3. a second light splitting unit; 4. a first light splitting unit; 5. a third light splitting unit; 6. a rubber frame; 7. an optical film assembly.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1 to 3, a light guide plate 1 according to a first embodiment of the present invention is applied to a backlight module, the light guide plate 1 has a V-CUT surface and a mesh surface, the V-CUT surface has a VA region 10, the VA region is determined by a range surrounded by a backlight module light-shielding adhesive, the light guide plate 1 is provided with a plurality of first light splitting units 4 and a plurality of second light splitting units 3, one end of the light guide plate 1 is connected with the plurality of light emitting units 2, the plurality of light emitting units 2 are LED lamps, the plurality of light emitting units 2 are uniformly disposed at one end of the light guide plate 1, the plurality of first light splitting units 4 and the plurality of second light splitting units 3 are disposed between the light guide plate 1 and the plurality of light emitting units 2, each of light emitting units 2 is configured with the first light splitting units 4 and the second light splitting units 3, the plurality of first light splitting units 4 are disposed between the plurality of second light splitting units 3, a gap is formed between the first light splitting unit 4 and the light emitting unit 2. After the light emitting unit 2 is connected with an external power supply, a light source emitted by the light emitting unit 2 is refracted into the light guide plate 1 through the first light splitting unit 4 and the second light splitting unit 3, and because a gap exists between the first light splitting unit 4 and the light emitting unit 2, light which is too concentrated in front of the LED lamp can be dispersed and weakened, so that the problem that a lamp eye appears in a backlight module under the condition of a short optical path is solved.

Illustratively, the distance from the first light splitting unit 4 to the light emitting unit 2 is greater than the distance from the second light splitting unit 3 to the light emitting unit 2, and an air space layer between the light guide plate 1 and the LED lamp may be increased by the first light splitting unit 4.

Illustratively, the first light splitting unit 4 and the second light splitting unit 3 are preferably arc-shaped, which can increase the incident angle of the LED light, and the second light splitting unit 3 can support the light guide plate 1 and the light emitting unit 2, and can also increase the assembly gap between the LED lamp and the light guide plate. The shapes of the first light splitting unit 4 and the second light splitting unit 3 may be triangular zigzag, trapezoidal zigzag, and the like, which is not limited herein.

Illustratively, the first light splitting units 4 are uniformly arranged between the second light splitting units 3, the first light splitting units 4 can be uniformly arranged between the second light splitting units 3 at intervals or continuously, the light splitting performance of the first light splitting units 4 can be adjusted by setting the size and density of the distance between the first light splitting units 4, the larger the distance between the first light splitting units 4 and the plurality of light emitting units 2 is, the denser the distance between the first light splitting units 4 is, the stronger the light splitting capacity is, the incident angle of light entering the light guide plate is increased, and light which is too concentrated in front of the LED lamp can be dispersed and weakened, so that the problem of lamp eyes is solved.

Illustratively, a plurality of third light splitting units 5 are disposed between the plurality of light emitting units 2, and the plurality of third light splitting units 5 are connected to the light guide plate 1. The setting of the size and density of the interval between the third light splitting unit 5 can adjust the light splitting performance of the third light splitting unit 5, the larger the distance between the third light splitting unit 5 and the light emitting unit 2 is, the more dense the interval between the third light splitting unit 5 is, the stronger the light splitting capacity is, and the light which is too concentrated in front of the LED lamp can be dispersed and weakened.

In this embodiment, several ways are made to set the sizes of the first light splitting unit 4 and the third light splitting unit 5 as shown in fig. 4 and fig. 5. The first light splitting units 4 are continuously or alternately and uniformly arranged between the second light splitting units 3, but the first light splitting units 4 are not arranged between the light emitting units 2; the first light splitting units 4 are continuously or alternately and uniformly arranged between the second light splitting units 3, but the size of the first light splitting units 4 between the light emitting units 2 is consistent with that of the first light splitting units 4 between the light emitting units 2 and the light guide plate 1; the first light splitting units 4 are uniformly arranged between the second light splitting units 3 continuously or at intervals, but the size of the first light splitting unit 4 between the light emitting units 2 is larger than the size of the first light splitting unit 4 between the light emitting units 2 and the light guide plate 1.

Illustratively, the light emitting unit 2 is an LED lamp, and the light emitting unit 2 is connected to an external power supply. The plurality of light emitting units 2 constitute a surface light source of a liquid crystal display panel (LCM) together with the light guide plate 1 and the optical film group 7.

Referring to fig. 6, it shows the embodiment of the present invention provides a backlight module for a liquid crystal display panel, including a light guide plate, a rubber frame 6 and an optical film group 7, the light guide plate and the optical film group 7 are installed on the rubber frame 6, the material of the rubber frame 6 is not limited, the optical film group 7 includes a reflector plate, a light guide plate, a diffusion sheet, a lower brightness enhancement sheet, an upper brightness enhancement sheet and a shading adhesive. As shown in fig. 6, the frame 6, the reflector, the light guide plate 1, the diffuser, the lower brightness enhancement film, the upper brightness enhancement film, and the light-shielding adhesive are sequentially arranged from top to bottom. When the light emitted by the light emitting unit 2 irradiates the liquid crystal panel, the light can be upwards transmitted through the lower polarizing plate, and different liquid crystal panels can change the polarization direction of the light according to own mechanisms. Then the light contacts the color filter to generate color, and finally enters the upper polaroid. After the polarization direction is converted by the liquid crystal, part of light can be emitted, and part of light can be absorbed. Each pixel on the whole liquid crystal panel can respectively determine the intensity of the emergent light, so that an image is generated. Therefore, the backlight module supplies sufficient light sources with uniform brightness and distribution for the liquid crystal display panel, so that the liquid crystal display panel can normally display images. And light guide plate 1 among the backlight unit can effectual dispersion and the too concentrated light in front of the weakening LED lamp to the problem of lamp eye appears in backlight unit under the short optical path condition has been improved.

The above embodiment numbers of the present invention are only for description, and do not represent the advantages and disadvantages of the embodiments.

Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner.

The above is only the preferred embodiment of the present invention, and not the scope of the present invention, all the equivalent structures or equivalent flow changes made by the contents of the specification and the drawings or the direct or indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. The light guide plate is characterized in that a plurality of first light splitting units and a plurality of second light splitting units are arranged on the light guide plate, one end of the light guide plate is connected with a plurality of light emitting units, the first light splitting units and the second light splitting units are arranged between the light guide plate and the light emitting units, each light emitting unit is provided with the first light splitting units and the second light splitting units, the first light splitting units are arranged between the second light splitting units, and gaps are reserved between the first light splitting units and the light emitting units.

2. The light guide plate according to claim 1, wherein a distance from the first light splitting unit to the light emitting unit is greater than a distance from the second light splitting unit to the light emitting unit.

3. The light guide plate according to claim 2, wherein the first light splitting unit and the second light splitting unit are arc-shaped.

4. The light guide plate according to claim 1, wherein the first light splitting units are uniformly disposed between the second light splitting units at intervals or continuously.

5. The light guide plate according to claim 1, wherein a third light distribution unit is disposed between the plurality of light emitting units, and the plurality of third light distribution units are connected to the light guide plate.

6. A backlight module comprising the light guide plate according to any one of claims 1 to 5, a frame and an optical film set, wherein the light guide plate and the optical film set are mounted on the frame.