WO2020015399A1

WO2020015399A1 - Light guide plate and display device

Info

Publication number: WO2020015399A1
Application number: PCT/CN2019/082293
Authority: WO
Inventors: 程加河
Original assignee: 惠科股份有限公司; 重庆惠科金渝光电科技有限公司
Priority date: 2018-07-17
Filing date: 2019-04-11
Publication date: 2020-01-23
Also published as: CN108594358A

Abstract

A light guide plate (30a), comprising a main body (31a), a light entry surface (32a) located at a side portion of the main body (31a), and a light exit surface (33a) located at a top portion of the main body (31a). Bubbles (311a) are formed in the main body (31a). Also disclosed is a display device comprising the light guide plate. The provision of bubbles can reduce the weight of the light guide plate and disrupt the total internal reflection of light, producing a softened light-emitting effect, such that the light can be uniformly emitted.

Description

Light guide plate and display device

Technical field

The present application relates to the field of display technology, and in particular, to a light guide plate and a display device including the light guide plate.

Background technique

At present, in the field of display technology, a surface light source is often formed by combining a light guide plate with an edge-type light source. The light emitted by the edge-type light source enters the light guide plate from the light entrance surface on one side of the light guide plate, and then passes through the light guide points on the light guide plate. After being emitted and diffused, it is emitted from the light exit surface of the light guide plate to provide the panel with the light required for work.

However, in order to make full use of the light source emitted by the LED so that most of the light enters the light guide plate, the light guide plate needs to reach a certain thickness, which results in an increase in the thickness of the display, which does not meet the current trend of lightweight display development.

Summary of the invention

In order to solve the above problems, embodiments of the present application provide a light guide plate and a display device.

In order to achieve the above object, a light guide plate provided in an embodiment of the present application is used for a display device, and the light guide plate includes: a main body, and air bubbles for reducing weight and atomizing light are formed in the main body; The light incident surface is located on the side of the body; and the light emitting surface is located on the top of the body; wherein the air bubbles are formed by a foaming agent; the light guide plate is made of polymethyl methacrylate material or transparent Made of polycarbonate material; the air bubbles in the body are evenly distributed, the diameter of the air bubbles is 0.1mm to 2mm; the volume ratio of the air bubbles to the body is 1: 9 to 4: 6.

An embodiment of the present application further provides a light guide plate for a display device. The light guide plate includes a body, a light incident surface on a side of the body, and a light emitting surface on a top of the body. bubble.

In the above light guide plate, the air bubbles in the body are evenly distributed, and the diameter of the air bubbles is 0.1 mm to 2 mm; the volume ratio of the air bubbles to the body is 1: 9 to 4: 6.

In the above light guide plate, the body includes a bubble that makes the light guide plate have a hollow structure; in a direction perpendicular to the light exit surface, the bubble is circular or rectangular, and the bubble is provided in the body Inside the center.

In the above light guide plate, the light guide plate includes a reflective surface opposite to the light emitting surface; a center line of the air bubble is centrally disposed between the reflective surface and the light emitting surface, or is biased toward the reflective surface. Between the reflecting surface and the light emitting surface, the thickness of the bubble is 0.1 mm to 3 mm.

In the light guide plate described above, the light guide plate includes a reflecting surface opposite to the light emitting surface; the air bubbles in the body are located on the same plane, the plane is parallel to the light emitting surface, and is close to the reflecting surface and away from the reflecting surface. The light emitting surface is described; the diameter of the bubbles is 0.3 mm to 1.5 mm; and the volume ratio of the bubbles to the body is 1: 9 to 3: 7.

In the above light guide plate, the light guide plate includes a reflective surface opposite to the light emitting surface; air bubbles in the body are located on two mutually parallel planes between the light emitting surface and the reflecting surface; the two planes and The light emitting surface and the reflecting surface are parallel; two planes are close to the reflecting surface and far from the light emitting surface; the diameter of the bubble is 0.1mm to 1.5mm; the ratio of the volume of the bubble to the body is 1: 9 to 4: 6.

In the above light guide plate, the body includes a central region and a peripheral region surrounding the central region, and bubbles in the peripheral region are denser than bubbles in the central region; and the diameter of the bubbles is 0.1 mm to 1.5 mm; The central area is a symmetrical figure or a special figure;

The bubble volume ratio in the peripheral region is 2: 8 to 3: 7; the bubble volume ratio in the central region is 1: 9 to 2: 8.

In the above light guide plate, the air bubbles in the main body maintain a distance from the light incident surface, and the distance is 2 to 10 mm; and the central region is rectangular or circular.

In order to achieve the above object, a display device provided in an embodiment of the present application includes any one of the light guide plates described above.

In the above display device, the air bubbles are formed of a foaming agent and are used for weight reduction and atomization of light.

The above display device further includes a light source module and a back plate; the light source module includes a light emitting unit disposed adjacent to the light incident surface and a circuit board supporting the light emitting unit; the back plate is disposed at the bottom of the light guide plate .

In the above display device, a surface of the back plate facing the light guide plate is a mirror-finished surface.

Compared with the exemplary technology, air bubbles are formed in the body of the light guide plate provided in the embodiment of the present application, and the air bubbles can be provided to reduce the weight of the light guide plate without reducing the thickness of the light guide plate. The thickness of the light guide plate is unchanged, and most of the light emitted by the light emitting unit can still enter the light guide plate, and air bubbles are set in the body of the light guide plate. In the present application, by forming air bubbles in the body of the light guide plate, the weight of the light guide plate can be reduced without reducing the thickness of the light guide plate. In addition, the air bubbles can destroy the total reflection of light in the body, and produce an atomized light exit effect, so that more light is emitted uniformly from the light exit surface on the top of the light guide plate. The display device provided in the embodiment of the present application has a light weight product, which meets the requirements for reducing the weight of the display device. In addition, the air bubbles in the light guide plate have the effect of atomizing light, so that the light emitting surface forms a relatively atomized light source, which improves the uniform display effect.

BRIEF DESCRIPTION OF THE DRAWINGS

The drawings described here are used to provide a further understanding of the embodiments of the present application and constitute a part of the embodiments of the present application. The schematic embodiments of the present application and the descriptions thereof are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

FIG. 1 is a schematic diagram of a display device in an exemplary embodiment of the present application; FIG.

2 is a schematic diagram of a display device in another exemplary embodiment of the present application;

3 is a schematic diagram of a display device in another exemplary embodiment of the present application;

4 is a schematic diagram of a display device in another exemplary embodiment of the present application;

5 is a schematic diagram of a display device in still another exemplary embodiment of the present application;

6 is a schematic diagram of a light guide plate in the display device of FIG. 5;

7 is a schematic diagram of a display device in another exemplary embodiment of the present application;

FIG. 8 is a schematic diagram of a light guide plate in the display device of FIG. 7.

Reference signs:

100a-display device;

10a-light source module; 11a-light emitting unit; 12a-circuit board; 20a-backplane;

30a-light guide plate; 31a-body; 311a-bubble;

32a-light entrance surface; 33a-light exit surface; 34a-reflection surface.

100b-display device;

10b-light source module; 11b-light-emitting unit; 12b-circuit board; 20b-backplane;

30b-light guide plate; 31b-body; 311b-bubble;

32b-light entrance surface; 33b-light exit surface; 34b-reflection surface.

100c-display device;

10c-light source module; 11c-light emitting unit; 12c-circuit board; 20c-backplane;

30c-light guide plate; 31c-body; 311c-bubble;

32c-light entrance surface; 33c-light exit surface; 34c-reflection surface.

100d-display device;

10d-light source module; 11d-light-emitting unit; 12d-circuit board; 20d-backplane;

30d-light guide plate; 31d-body; 311d-bubble;

32d-light entrance surface; 33d-light exit surface; 34d-reflection surface.

100e-display device;

10e-light source module; 11e-light emitting unit; 12e-circuit board; 20e-backplane;

30e-light guide plate; 31e-body; 311e-bubble; 312e-central area; 313e-peripheral area;

32e-light entrance surface; 33e-light exit surface; 34e-reflection surface;

100f-display device;

10f-light source module; 11f-light-emitting unit; 12f-circuit board; 20f-backplane;

30f-light guide plate; 31f-body; 311f-bubble; 312f-central area; 313f-peripheral area;

32f-light entrance surface; 33f-light exit surface; 34f-reflection surface.

detailed description

In order to make the purpose, technical solution, and advantages of the present application clearer, the technical solution of the present application will be clearly and completely described in combination with specific embodiments of the present application and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

The display device in the embodiment of the present application may be a liquid crystal display panel, an OLED (Organic Light Emitting Diode) display device, a QLED (Quantum Light Emitting Diode) display device, a curved display device, or other display devices. .

An embodiment of the present application provides a display device 100a. As shown in FIG. 1, the display device 100a includes a light source module 10a, a back plate 20a, and a light guide plate 30a.

The light guide plate 30a includes a main body 31a, a light incident surface 32a on the side of the main body 31a, a light exit surface 33a on the top of the main body 32a, and a reflective surface 34a on the bottom of the main body 31a opposite to the light exit surface 33a, and reflects in one embodiment The surface 34a is provided with a plurality of halftone dots or a reflective sheet is bonded to the surface. The light incident surface 32a may be located on only one side of the main body 31a, or may be symmetrically distributed on opposite sides of the main body 31a, or even on the sides of the main body 31a. The light source module 10a includes a light emitting unit 11a disposed adjacent to the light incident surface 32a of the light guide plate, and a circuit board 12a supporting the light emitting unit 11a. The back plate 20a is disposed at the bottom of the light guide plate 30a. The surface of the back plate 20a facing the light guide plate 30a is mirror-finished to reflect the light emitted from the reflective surface 34a onto the back plate 20a onto the light exit surface 33a of the light guide plate 30a. Mirror treatment means that the surface is smooth, and most of the light can be specularly reflected after incident on the surface.

In the embodiment of the present application, air bubbles 311a are formed in the body 31a of the light guide plate 30a. The arrangement of the air bubbles 311a can reduce the weight of the light guide plate 30a without reducing the thickness of the light guide plate 30a. The thickness of the light guide plate 30a is unchanged, and most of the light emitted by the light emitting unit 11a can still enter the light guide plate 30a. The air bubble 311a is disposed in the body 31a, and the structural strength of the light guide plate 30a will not be greatly reduced. In addition, the bubble 311a can destroy the total reflection of the light in the body 31a, and produce a fogged light output effect, so that more light is uniformly emitted from the light output surface 33a on the top of the light guide plate 30a. The weight of the display device 100a using the light guide plate 30a is also effectively reduced.

The body 31a shown in FIG. 1 may include a plurality of uniformly distributed air bubbles 311a. The diameter of the air bubbles 311a in the main body 31a ranges from 0.1 mm to 2 mm, and can be specifically set according to the thickness of the light guide plate 30a and the weight to be reduced. For example, when the thickness of the light guide plate 30a is 4mm, the diameter of the bubble 311a may be 0.5mm; when the thickness of the light guide plate 30a is 6mm, the diameter of the bubble 311a may be 0.8mm; when the thickness of the light guide plate 30a is 9mm, the diameter of the bubble 311a may be It's 1.5mm.

The space occupied by the bubble 311a in the body 31a greatly affects the weight of the light guide plate 30a. When the weight to be reduced is small, the total volume of the bubble 311a can be relatively small; when the weight to be reduced is large, the total volume of the bubble 311a can be It is large, but in order to ensure that the light guide plate 30a has a certain strength, the total volume of the bubbles 311a should not be too large. In this embodiment, the volume ratio of the bubbles 311a to the body 31a ranges from 1: 9 to 4: 6. For example, when a small weight reduction is required, the volume ratio of the bubbles 311a to the body 31a may be 2: 8; when a large weight reduction is required, the volume ratio of the bubbles 311a to the body 31a may be 3: 7.

In the light guide plate 30a of the embodiment of the present application, during the molding and manufacturing process of the light guide plate 30a, an appropriate amount of a foaming agent is added inside the light guide plate material to generate air bubbles 311a. The material of the light guide plate 30a is preferably a polymer material such as PMMA (Polymethylmethacrylate, polymethyl methacrylate) or transparent PC (Polycarbonate, polycarbonate), so that the foaming agent and the The polymer materials are uniformly mixed to form uniformly distributed air bubbles 311a in the body 31a of the light guide plate 30a.

In another embodiment of the light guide plate and the display device of the present application, as shown in FIG. 2, the display device 100 b includes a light source module 10 b, a back plate 20 b, and a light guide plate 30 b.

The light guide plate 30b includes a main body 31b, a light incident surface 32b on the side of the main body 31b, a light exit surface 33b on the top of the main body 32b, and a reflective surface 34b on the bottom of the main body 31b and opposite to the light exit surface 33b. The light incident surface 32b may be located only on one side of the body 31b, or may be symmetrically distributed on opposite sides of the body 31b, or even on the sides of the body 31b. The light source module 10b includes a light emitting unit 11b disposed adjacent to the light incident surface 32b of the light guide plate 30b, and a circuit board 12b supporting the light emitting unit 11b. The back plate 20b is disposed at the bottom of the light guide plate 30b. The surface of the back plate 20b facing the light guide plate 30b is treated as a mirror to reflect the light emitted from the reflective surface 34b onto the back plate 20b onto the light exit surface 33b of the light guide plate 30b. Mirror treatment means that the surface is smooth, and most of the light can be specularly reflected after incident on the surface.

In the embodiment of the present application, air bubbles 311b are formed in the body 31b of the light guide plate 30b. The arrangement of the air bubbles 311b can reduce the weight of the light guide plate 30b without reducing the thickness of the light guide plate 30b. The thickness of the light guide plate 30b is unchanged, most of the light emitted by the light emitting unit 11b can still enter the light guide plate 30b, and the air bubble 311b is disposed in the body, and the structural strength of the light guide plate 30b will not be greatly reduced. In addition, the bubble 311b can destroy the total reflection of the light in the body 31b, and generate a fogged light output effect, so that more light is uniformly emitted from the light output surface 33b on the top of the light guide plate 30b. The weight of the display device 100b using the light guide plate 30b is also effectively reduced.

The body 31b may include a bubble 311b, that is, the light guide plate 30b forms a hollow structure. In a direction perpendicular to the reflecting surface 34b or the light emitting surface 33b, the air bubble 311b may be circular or rectangular and disposed at the center of the body 31b. For example, the length of the light guide plate 30b is 400mm and the width is 300mm. If the bubble 311b is circular, the diameter of the circle can be 50mm to 100mm, such as 80mm. If the bubble 311b is rectangular, the length of the rectangular bubble 311b can be 80mm, width is 60mm.

The center line of the bubble 311b may be disposed between the reflective surface 34b and the light emitting surface 33b in the center, or may be offset in the direction of the reflective surface 34b.

The thickness of the bubble is 0.1mm to 3mm, which is determined according to the thickness of the light guide plate 30b. The bubble 311b provided between the reflecting surface 34b and the light emitting surface 33b should be kept at a distance from the reflecting surface 34b and the light emitting surface 33b so that The light guide plate 30b still has sufficient strength. When the thickness of the light guide plate 30b is 4 mm, the thickness of the bubble 311b is 0.5 mm to 2 mm, for example, 1 mm.

In the light guide plate 30b of the embodiment of the present application, during the molding and manufacturing process of the light guide plate 30b, an appropriate amount of a foaming agent is added inside the light guide plate material to generate air bubbles 311b. The material of the light guide plate 30b is preferably a polymer material such as PMMA or transparent PC.

In another embodiment of the light guide plate and the display device of the present application, as shown in FIG. 3, the display device 100 c includes a light source module 10 c, a back plate 20 c, a light guide plate 30 c, and an optical film group.

The light guide plate 30c includes a main body 31c, a light incident surface 32c on the side of the main body 31c, a light exit surface 33c on the top of the main body 32c, and a reflective surface 34c located on the bottom of the main body 31c and opposite to the light exit surface 33c. The light incident surface 32c may be located only on one side of the main body 31c, or may be symmetrically distributed on both sides of the main body 31c, or even on the sides of the main body 31c. The light source module 10c includes a light emitting unit 11c disposed adjacent to the light incident surface 32c of the light guide plate 30c and a circuit board 12c supporting the light emitting unit 11c. In one embodiment, the light emitting unit 11c is an LED, and the corresponding light source module 10c is an LED light bar. . The back plate 20c is disposed at the bottom of the light guide plate 30c. The surface of the back plate 20c facing the light guide plate 30c is mirror-finished to reflect the light emitted from the reflective surface 34c onto the back plate 20c onto the light exit surface 33c of the light guide plate 30c. Mirror treatment means that the surface is smooth, and most of the light can be specularly reflected after incident on the surface. In addition, the optical film group (not labeled in FIG. 3) is located above the light exit surface 33 c of the light guide plate 30 c, and includes, for example, an optical film such as a diffusion sheet.

In the embodiment of the present application, air bubbles 311c are formed in the body 31c of the light guide plate 30c. The arrangement of the air bubbles 311c can reduce the weight of the light guide plate 30c without reducing the thickness of the light guide plate 30c. The thickness of the light guide plate 30c does not change. Most of the light emitted by the light emitting unit 11c can still enter the light guide plate 30c. The air bubble 311c is disposed in the body, and the structural strength of the light guide plate 30c will not be greatly reduced. In addition, the bubble 311c can destroy the total reflection of the light in the body 31c, and produce a fogged light output effect, so that more light is uniformly emitted from the light output surface 33c on the top of the light guide plate 30c. The weight of the display device 100c using the light guide plate 30c is also effectively reduced.

In this embodiment, the bubbles 311c are located on a layer between the light emitting surface 33c and the reflecting surface 34c, and the plurality of bubbles 311c are generally located on the same plane, which is parallel to the reflecting surface 34c and the light emitting surface 33c and is away from the reflecting surface 34c. Light emitting surface 33c. The bubble 311c is disposed near the reflecting surface 34c, so that the light totally reflected in the body 31c is scattered by the bubble 311c and exits from the light emitting surface 33c when it approaches the reflecting surface 34c, thereby improving the light flux on the light emitting surface 33c.

The diameter of the air bubble 311c in the body 31c ranges from 0.3 mm to 1.5 mm, and can be specifically set according to the thickness of the light guide plate 30c and the weight to be reduced. For example, when the thickness of the light guide plate 30c is 5mm, the diameter of the bubble 311c may be 0.4mm; when the thickness of the light guide plate 30c is 6mm, the diameter of the bubble 311c may be 1.0mm; when the thickness of the light guide plate 30c is 10mm, the diameter of the bubble 311c may be It is 1.3mm.

The space occupied by the bubble 311c in the body 31c greatly affects the weight of the light guide plate 30c. When the weight to be reduced is small, the total volume of the bubble 311c can be relatively small; when the weight to be reduced is large, the total volume of the bubble 311c can be It is large, but in order to ensure that the light guide plate 30c has a certain strength, the total volume of the bubble 311c should not be too large. In this embodiment, the volume ratio of the bubbles 311c to the body 31c ranges from 1: 9 to 3: 7. For example, when a small weight reduction is required, the volume ratio of the bubble 311c to the body 31c may be 1: 9; when a large weight reduction is required, the volume ratio of the bubble 311c to the body 31c may be 2: 8.

In the light guide plate 30c of the embodiment of the present application, during the molding and manufacturing process of the light guide plate 30c, an appropriate amount of a foaming agent is added inside the light guide plate material to generate air bubbles 311c. The material of the light guide plate 30c is preferably a polymer material such as PMMA or transparent PC.

In another embodiment of the light guide plate and the display device of the present application, as shown in FIG. 4, the display device 100 d includes a light source module 10 d, a back plate 20 d, a light guide plate 30 d, and an optical film group.

The light guide plate 30d includes a main body 31d, a light incident surface 32d on the side of the main body 31d, a light exit surface 33d on the top of the main body 32d, and a reflective surface 34d on the bottom of the main body 31d and opposite to the light exit surface 33d. The light incident surface 32d may be located on only one side of the body 31d, or may be symmetrically distributed on both sides of the body 31d, or even on the sides of the body 31d. The light source module 10d includes a light emitting unit 11d disposed adjacent to the light incident surface 32d of the light guide plate 30d, and a circuit board 12d supporting the light emitting unit 11d. The back plate 20d is disposed at the bottom of the light guide plate 30d. The surface of the back plate 20d facing the light guide plate 30d is mirror-finished to reflect the light emitted from the reflective surface 34d onto the back plate 20d to the light exit surface 33d of the light guide plate 30d. Mirror treatment means that the surface is smooth, and most of the light can be specularly reflected after incident on the surface. In addition, the optical film group (not shown in FIG. 4) is located above the light emitting surface 33 d of the light guide plate 30 d, and includes, for example, an optical film such as a diffusion sheet.

In the embodiment of the present application, air bubbles 311d are formed in the body 31d of the light guide plate 30d. The arrangement of the air bubbles 311d can reduce the weight of the light guide plate 30d without reducing the thickness of the light guide plate 30d. The thickness of the light guide plate 30d is unchanged, most of the light emitted by the light emitting unit 11d can still enter the light guide plate 30d, and the air bubble 311d is disposed in the body, and the structural strength of the light guide plate 30d will not be greatly reduced. In addition, the bubble 311d can destroy the total reflection of the light in the body 31d, and produce a fogged light output effect, so that more light is uniformly emitted from the light output surface 33d on the top of the light guide plate 30d. The weight of the display device 100d using the light guide plate 30d is also effectively reduced.

In this embodiment, the bubbles 311d are located on two layers between the light emitting surface 33d and the reflecting surface 34d, and the plurality of bubbles 311d are located on two mutually parallel planes, and the two mutually parallel planes are parallel to the reflecting surface 34d and the light emitting surface 33d. And the two planes which are parallel to each other are close to the reflecting surface 34d and away from the light emitting surface 33d as a whole. The bubble 311d is disposed near the reflecting surface 34d, so that the light totally reflected in the body 31d is scattered by the bubble 311d and exits from the light emitting surface 33d when approaching the reflecting surface 34d, thereby improving the light flux on the light emitting surface 33d.

The diameter of the air bubble 311d in the body 31d ranges from 0.1 mm to 1.5 mm, and can be specifically set according to the thickness of the light guide plate 30d and the weight to be reduced. For example, when the thickness of the light guide plate 30d is 5mm, the diameter of the bubble 311d may be 0.5mm; when the thickness of the light guide plate 30d is 6mm, the diameter of the bubble 311d may be 1.0mm; when the thickness of the light guide plate 30d is 10mm, the diameter of the bubble 311d may be It is 1.2mm.

The space occupied by the bubble 311d in the body 31d greatly affects the weight of the light guide plate 30d. When the weight to be reduced is small, the total volume of the bubble 311d can be relatively small; when the weight to be reduced is large, the total volume of the bubble 311d can be It is large, but in order to ensure that the light guide plate 30d has a certain strength, the total volume of the bubble 311d should not be too large. In this embodiment, the ratio of the volume of the bubbles 311d to the volume of the body 31d ranges from 1: 9 to 4: 6. For example, when a small weight reduction is required, the volume ratio of the bubble 311d to the body 31d may be 1: 9; when a large weight reduction is required, the volume ratio of the bubble 311d to the body 31d may be 2: 8.

In the light guide plate 30d of the embodiment of the present application, during the molding and manufacturing process of the light guide plate 30d, an appropriate amount of a foaming agent is added inside the light guide plate material to generate bubbles 311d. The material of the light guide plate 30d is preferably a polymer material such as PMMA or transparent PC.

In still another embodiment of the light guide plate and the display device of the present application, as shown in FIG. 5, the display device 100 e includes a light source module 10 e, a back plate 20 e, a light guide plate 30 e, and an optical film group.

The light guide plate 30e includes a main body 31e, a light incident surface 32e on the side of the main body 31e, a light exit surface 33e on the top of the main body 32e, and a reflective surface 34e on the bottom of the main body 31e and opposite to the light exit surface 33e. The light incident surface 32e may be located on only one side of the body 31e, or may be symmetrically distributed on both sides of the body 31e, or even on the sides of the body 31e. The light source module 10e includes a light emitting unit 11e disposed adjacent to the light incident surface 32e of the light guide plate 30e and a circuit board 12e supporting the light emitting unit 11e. The back plate 20e is disposed at the bottom of the light guide plate 30e. The surface of the back plate 20e facing the light guide plate 30e is mirror-finished to reflect the light emitted from the reflective surface 34e onto the back plate 20e onto the light exit surface 33e of the light guide plate 30e. Mirror treatment means that the surface is smooth, and most of the light can be specularly reflected after incident on the surface. In addition, the optical film group (not labeled in FIG. 5) is located above the light emitting surface 33 e of the light guide plate 30 e, and includes, for example, an optical film such as a diffusion sheet.

In the embodiment of the present application, air bubbles 311e are formed in the body 31e of the light guide plate 30e. The arrangement of the air bubbles 311e can reduce the weight of the light guide plate 30e without reducing the thickness of the light guide plate 30e. The thickness of the light guide plate 30e does not change, most of the light emitted by the light emitting unit 11e can still enter the light guide plate 30e, and the air bubble 311e is set in the body, which will not greatly reduce the structural strength of the light guide plate 30e. In addition, the bubble 311e can destroy the total reflection of the light in the body 31e, and generate a fogged light output effect, so that more light is uniformly emitted from the light output surface 33e on the top of the light guide plate 30e. The weight of the display device 100e using the light guide plate 30e is also effectively reduced.

5 and 6, the body 31e includes a central area 312e and a peripheral area 313e surrounding the central area 312e. Especially, the thickness of the light guide plate 30e is small, and the number of air bubbles 311e on the body 31e will greatly reduce the light guide plate 30e. In terms of intensity, the bubbles 311e of the peripheral region 313e may be denser than the bubbles 311e of the central region 312e, so that the central region 312e has a higher intensity than the peripheral region 313e.

The central area 312e may be a symmetrical figure or a special figure, and the symmetrical figure is, for example, a circle or a rectangle. In this embodiment, the central area 312e is rectangular.

The diameter of the air bubble 311e in the main body 31e ranges from 0.1 mm to 1.5 mm, and can be specifically set according to the thickness of the light guide plate 30e and the weight to be reduced. For example, when the thickness of the light guide plate 30e is 5mm, the diameter of the bubble 311e may be 0.5mm; when the thickness of the light guide plate 30e is 6mm, the diameter of the bubble 311e may be 1.0mm; when the thickness of the light guide plate 30e is 10mm, the diameter of the bubble 311e may be It is 1.2mm.

The space occupied by the bubble 311e in the body 31e greatly affects the weight of the light guide plate 30e. When the weight to be reduced is small, the total volume of the bubble 311e can be relatively small; when the weight to be reduced is large, the total volume of the bubble 311e can be It is large, but in order to ensure that the light guide plate 30e has a certain strength, the total volume of the bubble 311e should not be too large. In this embodiment, the volume ratio of the bubbles 311e to the body 31e ranges from 1: 9 to 4: 6. Specifically, the bubble volume ratio of the central region 312e may be 1: 9, and the bubble volume ratio of the peripheral region 313e may be 3: 7. For example, when a small weight loss is required, the bubble volume ratio of the central region 312e may be 1: 9, and the bubble volume ratio of the peripheral region 313e may be 2: 8; when substantial weight reduction is required, the bubble volume of the central region 312e may be The ratio may be 2: 8, and the ratio of the bubble volume in the peripheral region 313e may be 3: 7.

The air bubble 311e is located in the body 31e, and the air bubble 311 maintains a distance from the light incident surface 32e, and the distance dimension is 2 to 10 mm, for example, 5 mm.

Compared with the exemplary technology, in the embodiment of the present application, since the air bubble 311e is formed in the body 31e of the light guide plate 30e, the light guide plate 30e is lightened without reducing the thickness of the light guide plate 30e and the intensity of the light guide plate 30e. The weight of the light guide plate 30e. The display device 100e including the light guide plate 30e is also made lighter. In addition, the bubbles 311e can be used as a scattering structure to scatter light.

In the light guide plate 30e of the embodiment of the present application, during the molding and manufacturing process of the light guide plate 30e, an appropriate amount of a foaming agent is added inside the light guide plate material to generate air bubbles 311e. The material of the light guide plate 30e is preferably a polymer material such as PMMA or transparent PC.

In another embodiment of the light guide plate and the display device of the present application, as shown in FIG. 7, the display device 100 f includes a light source module 10 f, a back plate 20 f, a light guide plate 30 f, and an optical film group.

The light guide plate 30f includes a main body 31f, a light incident surface 32f on the side of the main body 31f, a light exit surface 33f on the top of the main body 32f, and a reflective surface 34f on the bottom of the main body 31f and opposite to the light exit surface 33f. The light incident surface 32f may be located on only one side of the body 31f, or may be symmetrically distributed on both sides of the body 31f, or even on the sides of the body 31f. The light source module 10f includes a light emitting unit 11f disposed adjacent to the light incident surface 32f of the light guide plate 30f and a circuit board 12f supporting the light emitting unit 11f. The back plate 20f is disposed at the bottom of the light guide plate 30f. The surface of the back plate 20f facing the light guide plate 30f is treated as a mirror surface, so as to reflect the light incident on the back plate 20f from the reflective surface 34f to the light exit surface 33f of the light guide plate 30f. Mirror treatment means that the surface is smooth, and most of the light can be specularly reflected after incident on the surface. In addition, the optical film group (not labeled in FIG. 7) is located above the light exit surface 33 f of the light guide plate 30 f, and includes, for example, an optical film such as a diffusion sheet.

In the embodiment of the present application, air bubbles 311f are formed in the body 31f of the light guide plate 30f. The arrangement of the air bubbles 311f can reduce the weight of the light guide plate 30f without reducing the thickness of the light guide plate 30f. The thickness of the light guide plate 30f does not change. Most of the light emitted by the light emitting unit 11f can still enter the light guide plate 30f. The air bubble 311f is disposed in the body, and the structural strength of the light guide plate 30f will not be greatly reduced. In addition, the bubble 311f has a scattering function, which can destroy the total reflection of the light in the body 31f, and generate an atomized light emitting effect, so that more light is uniformly emitted from the light emitting surface 33f on the top of the light guide plate 30f. The weight of the display device 100f using the light guide plate 30f is also effectively reduced.

7 and 8, the body 31f includes a central area 312f and a peripheral area 313f surrounding the central area 312f. In particular, the thickness of the light guide plate 30f is small, and the number of air bubbles 311f on the body 31f will greatly reduce the light guide plate 30f. In terms of intensity, the bubbles 311f of the peripheral region 313f may be denser than the bubbles 311f of the central region 312f, so that the central region 312f has a higher intensity than the peripheral region 313f.

The central area 312f may be a symmetrical figure or a special figure, such as a circle or a rectangle. In this embodiment, the central area 312f is circular.

The diameter of the air bubble 311f in the body 31f ranges from 0.2 mm to 1.5 mm, and can be specifically set according to the thickness of the light guide plate 30f and the weight to be reduced. For example, when the thickness of the light guide plate 30f is 5mm, the diameter of the bubble 311f may be 0.4mm; when the thickness of the light guide plate 30f is 6mm, the diameter of the bubble 311f may be 1.2mm; when the thickness of the light guide plate 30f is 10mm, the diameter of the bubble 311f may be It is 1.4mm.

The space occupied by the bubble 311f in the body 31f greatly affects the weight of the light guide plate 30f. When the weight to be reduced is small, the total volume of the bubble 311f can be relatively small; when the weight to be reduced is large, the total volume of the bubble 311f can be It is large, but in order to ensure that the light guide plate 30f has a certain strength, the total volume of the bubble 311f should not be too large. In this embodiment, the ratio of the volume of the bubbles 311f to the volume of the body 31f ranges from 1: 9 to 4: 6. Specifically, the bubble volume ratio of the central region 312f may be 1: 9, and the bubble volume ratio of the peripheral region 313f may be 3: 7. For example, when a small weight loss is required, the bubble volume ratio of the central area 312f may be 1: 9, and the bubble volume ratio of the peripheral area 313f may be 2: 8; when a substantial weight loss is required, the bubble volume of the central area 312f may be The ratio may be 2: 8, and the ratio of the bubble volume in the peripheral region 313f may be 3: 7.

Compared with the exemplary technology, in the embodiment of the present application, since the air bubble 311f is formed in the body 31f of the light guide plate 30f, the light guide plate 30f is lightened without reducing the thickness and the intensity of the light guide plate 30f. The weight of the light guide plate 30f. The display device 100f including the light guide plate 30f is also made lighter.

In the light guide plate 30f in the embodiment of the present application, during the molding and manufacturing process of the light guide plate 30f, an appropriate amount of a foaming agent is added inside the light guide plate material to generate bubbles 311f. The material of the light guide plate 30f is preferably a polymer material such as PMMA or transparent PC.

Finally, it is worth mentioning that, in addition to the aforementioned light source modules 10a-10f, back plates 20a-20f, side-type light guide plates 30a-30f and even optical film groups, the display devices 100a-100f in the foregoing embodiments also include: Structures known to those skilled in the art such as plastic frames, front frames, panels, etc. may be included.

The specific examples described above further describe the purpose and technical solution of this application in detail. It should be understood that the above are only specific embodiments of this application and are not intended to limit this application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the invention shall be included in the protection scope of this application.

Claims

A light guide plate includes:

A body, wherein air bubbles for reducing weight and atomizing light are formed in the body;

A light incident surface, the light incident surface is located on a side of the body; and

A light emitting surface, which is located on the top of the body;

Wherein, the bubbles are formed by a foaming agent;

The light guide plate is made of polymethyl methacrylate material or transparent polycarbonate material;

The air bubbles in the body are evenly distributed, and the diameter of the air bubbles is 0.1 mm to 2 mm;

The ratio of the volume of the bubbles to the body is 1: 9 to 4: 6.
A light guide plate includes:

A body, wherein air bubbles are formed in the body;

A light incident surface, the light incident surface is located on a side of the body; and

A light emitting surface, which is located on the top of the body.
The light guide plate according to claim 2, wherein the air bubbles in the body are evenly distributed, and the diameter of the air bubbles is 0.1 mm to 2 mm; the volume ratio of the air bubbles to the body is 1: 9 to 4: 6.
The light guide plate according to claim 2, wherein the body includes a bubble making the light guide plate a hollow structure; the bubble is circular or rectangular in a direction perpendicular to the light emitting surface, so The bubble is disposed at the center of the body.
The light guide plate according to claim 4, wherein the light guide plate includes a reflection surface disposed opposite to the light exit surface; a center line of the bubble is centrally disposed between the reflection surface and the light exit surface, or Offset to the direction of the reflecting surface; between the reflecting surface and the light emitting surface, the thickness of the bubble is 0.1 mm to 3 mm.
The light guide plate according to claim 2, wherein the light guide plate includes a reflective surface opposite to the light exit surface; the air bubbles in the body are located on the same plane, the plane is parallel to the light exit surface, and Close to the reflecting surface and away from the light emitting surface; the diameter of the bubbles is 0.3 mm to 1.5 mm; the volume ratio of the bubbles to the body is 1: 9 to 3: 7.
The light guide plate according to claim 2, wherein the light guide plate includes a reflective surface opposite to the light exit surface; and air bubbles in the body are located on two mutually parallel planes between the light exit surface and the reflective surface Two planes are parallel to the light emitting surface and the reflecting surface; two planes are close to the reflecting surface and far from the light emitting surface; the diameter of the bubble is 0.1mm to 1.5mm; the bubble and the body The volume ratio is from 1: 9 to 4: 6.
The light guide plate according to claim 2, wherein the body comprises a central region and a peripheral region surrounding the central region, and bubbles in the peripheral region are denser than bubbles in the central region; a diameter of the bubbles 0.1mm to 1.5mm; the central area is a symmetrical figure or a special figure;

The bubble volume ratio in the peripheral region is 2: 8 to 3: 7; the bubble volume ratio in the central region is 1: 9 to 2: 8.
The light guide plate according to claim 8, wherein the air bubbles in the main body maintain a distance from the light incident surface, and the distance is 2 to 10 mm; and the central region is rectangular or circular.
A display device includes: a light guide plate;

The light guide plate includes:

A body, wherein air bubbles are formed in the body;

A light incident surface, the light incident surface is located on a side of the body; and

A light emitting surface, which is located on the top of the body.
The display device according to claim 10, wherein the air bubbles in the body are evenly distributed, and the diameter of the air bubbles is 0.1 mm to 2 mm; the volume ratio of the air bubbles to the body is 1: 9 to 4: 6.
The display device according to claim 10, wherein the body includes a bubble making the light guide plate a hollow structure; and the bubble is circular or rectangular in a direction perpendicular to the light exit surface, so The bubble is disposed at the center of the body.
The display device according to claim 12, wherein the light guide plate includes a reflective surface disposed opposite to the light emitting surface; a center line of the bubble is centrally disposed between the reflective surface and the light emitting surface, or Offset to the direction of the reflecting surface; between the reflecting surface and the light emitting surface, the thickness of the bubble is 0.1 mm to 3 mm.
The display device according to claim 10, wherein the light guide plate includes a reflecting surface disposed opposite to the light emitting surface; air bubbles in the body are located on a same plane, the plane is parallel to the light emitting surface, and Close to the reflecting surface and away from the light emitting surface; the diameter of the bubbles is 0.3 mm to 1.5 mm; the volume ratio of the bubbles to the body is 1: 9 to 3: 7.
The display device according to claim 10, wherein the light guide plate includes a reflective surface opposite to the light emitting surface; and air bubbles in the body are located on two mutually parallel planes between the light emitting surface and the reflecting surface Two planes are parallel to the light emitting surface and the reflecting surface; two planes are close to the reflecting surface and far from the light emitting surface; the diameter of the bubble is 0.1mm to 1.5mm; the bubble and the body The volume ratio is from 1: 9 to 4: 6.
The display device according to claim 10, wherein the body comprises a central region and a peripheral region surrounding the central region, and bubbles in the peripheral region are denser than bubbles in the central region; a diameter of the bubbles 0.1mm to 1.5mm; the central area is a symmetrical figure or a special figure;

The bubble volume ratio in the peripheral region is 2: 8 to 3: 7; the bubble volume ratio in the central region is 1: 9 to 2: 8.
The display device according to claim 16, wherein the air bubbles in the main body maintain a distance from the light incident surface, and the distance is 2 to 10 mm; and the central region is rectangular or circular.
The display device according to claim 10, wherein the bubbles are formed of a foaming agent and are used for weight reduction and atomization of light.
The display device according to claim 10, wherein the display device further comprises a light source module and a back plate; the light source module includes a light emitting unit disposed adjacent to the light incident surface and a circuit board supporting the light emitting unit; The back plate is disposed on the bottom of the light guide plate.
The display device according to claim 19, wherein a surface of the back plate facing the light guide plate is a mirror-finished surface.