CN219456554U - Light guide plate and liquid crystal display - Google Patents

Abstract

The utility model provides a light guide plate and a liquid crystal display, and relates to the technical field of liquid crystal displays, wherein the light guide plate comprises a support piece, a light emitting piece and a light guide plate main body, and the light emitting piece and the light guide plate main body are both arranged in the support piece; and the light emitting member is used for emitting a light source to the light guide plate main body; the light guide plate main body comprises a light inlet surface, a screen dot surface and a light outlet surface, wherein the light inlet surface is connected between the screen dot surface and the light outlet surface; the light-emitting surface is provided with a plurality of V-shaped grooves; the plurality of V-shaped grooves are arranged in an included angle mode, and the extending direction of the included angle is parallel to the light source; the phenomenon of forming a dark area due to the blocking of a V structure in the prior art is relieved; further, the technical problems of optical uniformity and appearance quality of the liquid crystal display are affected, and the visual experience of a user is improved.

Description

Light guide plate and liquid crystal display

Technical Field

The present utility model relates to the field of liquid crystal displays, and more particularly, to a light guide plate and a liquid crystal display.

Background

The liquid crystal display is popular with consumers due to the characteristics of high brightness, wide color gamut, high contrast, fine image quality, light and thin structure and the like, and is also a mainstream display technology at present; the main structure of the liquid crystal display is divided into three parts, namely a liquid crystal screen, a backlight module and a driving board card, wherein the backlight module has the function of providing a uniform surface light source for the liquid crystal screen.

The backlight module generally comprises an LED light bar, a light guide plate, an optical film, a structural member and the like; the LED lamp strip provides a light source for the backlight module; the light guide plate converts light emitted by the LEDs into uniform area light sources; the optical film can improve the brightness and uniformity of the backlight module; in the prior art, the light guide plate mainly comprises a flat plate and a V-shaped structure plate; under the same condition, the V-shaped structure plate has the advantage of high brightness compared with a flat plate, but due to the blocking of the V-shaped structure, when light moves to two sides in the light guide plate, the light is rapidly refracted and emitted from the light emitting surface, so that the light (energy) reaching the side edge is reduced, and a phenomenon of a dark area is formed; the existence of the dark area can directly influence the optical uniformity and the appearance quality of the backlight module, thereby influencing the optical uniformity and the appearance quality of the liquid crystal display.

Disclosure of Invention

The utility model aims to provide a light guide plate and a liquid crystal display, which are used for relieving the phenomenon that light rays (energy) reaching a side edge are reduced and a dark area is formed due to the fact that the light rays are rapidly refracted and emitted from a light emitting surface when the light rays move to two sides in the light guide plate due to the blocking of a V structure in the prior art; the existence of the dark area can directly influence the optical uniformity and the appearance quality of the backlight module, thereby further influencing the technical problems of the optical uniformity and the appearance quality of the liquid crystal display.

In a first aspect, the light guide plate provided by the utility model comprises a backlight module, wherein the backlight module comprises a support piece, a light emitting piece and a light guide plate main body, and the light emitting piece and the light guide plate main body are both arranged in the support piece; the light emitting piece is used for emitting a light source to the light guide plate main body;

the light guide plate main body comprises a light incident surface, a net point surface and a light emergent surface, wherein the light incident surface is connected between the net point surface and the light emergent surface; the light-emitting surface is provided with a plurality of V-shaped grooves;

the V-shaped grooves are arranged in an included angle mode, and the extending direction of the included angle is parallel to the light source.

With reference to the first possible implementation manner of the first aspect, the present utility model provides a first possible implementation manner of the first aspect, wherein the light emitting element emits the light source at an angle of 120 ° and the included angle is 120 °.

With reference to the second possible implementation manner of the first aspect, the present utility model provides a second possible implementation manner of the first aspect, wherein the V-shaped groove may also be a polygonal arrangement.

With reference to the first aspect, the present utility model provides a third possible implementation manner of the first aspect, where the dot surface is provided with a plurality of dots, and the dots are used for diffuse reflection of light by the dot surface.

With reference to the first possible implementation manner of the first aspect, the present utility model provides a fourth possible implementation manner of the first aspect, further including a reflective sheet, where the reflective sheet is installed in the supporting member, and the reflective sheet is installed at an end of the light guide plate body facing the dot surface.

With reference to the fourth possible implementation manner of the first aspect, the present utility model provides a fifth possible implementation manner of the first aspect, further including a light enhancement sheet, where the light enhancement sheet is installed in the support, and the light enhancement sheet is installed at an end of the light guide plate body facing the light emitting surface.

With reference to the fourth possible implementation manner of the first aspect, the present utility model provides a sixth possible implementation manner of the first aspect, further including a diffusion sheet, where the diffusion sheet is installed between the light enhancement sheet and the light guide plate main body.

With reference to the sixth possible implementation manner of the first aspect, the present utility model provides a seventh possible implementation manner of the first aspect, wherein the light guide plate main body is detachably connected in the support member.

With reference to the seventh possible implementation manner of the first aspect, the present utility model provides an eighth possible implementation manner of the first aspect, the light emitting element is mounted on an inner wall of the supporting element, and the light emitting element is disposed on a side of the light guide plate body facing the light incident surface.

In a second aspect, the present utility model also provides a liquid crystal display comprising the light guide plate described above.

The embodiment of the utility model has the following beneficial effects: the light source is emitted to the light guide plate main body through the light emitting piece in a mode that the light emitting piece and the light guide plate main body are arranged in the supporting piece, and because the light guide plate comprises a light inlet surface, a net point surface and a light outlet surface, the light inlet surface is used for receiving the light source and introducing the light source into the light guide plate main body; the existence of the dark area can directly influence the optical uniformity and the appearance quality of the backlight module, so that the technical problems of the optical uniformity and the appearance quality of the liquid crystal display are further influenced, and the visual experience of a user is improved.

In order to make the above objects, features and advantages of the present utility model more comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the related art, the drawings that are required to be used in the description of the embodiments or the related art will be briefly described, and it is apparent that the drawings in the description below are some embodiments of the present utility model, and other drawings may be obtained according to the drawings without inventive effort for those skilled in the art.

Fig. 1 is a schematic diagram of a stacked structure of a backlight module in a light guide plate according to an embodiment of the present utility model;

fig. 2 is a schematic structural diagram of an incident light section of a light guide plate main body in the light guide plate according to the embodiment of the present utility model;

FIG. 3 is a schematic diagram illustrating the positions of the angles between the V-grooves and the angles of the light sources of the light guide plate according to the embodiment of the present utility model;

fig. 4 is a schematic structural diagram of a V-shaped groove in a light guide plate according to an embodiment of the present utility model.

Icon: 10-a support; 20-a light emitting member; 21-a light source; 30-a light guide plate body; 31-a light incident surface; 32-dot surface; 33-a light-emitting surface; a 40-V groove; 50-included angle; 60-reflecting sheet; 70-polishing sheet; 80-diffusion sheet.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Physical quantities in the formulas, unless otherwise noted, are understood to be basic quantities of basic units of the international system of units, or derived quantities derived from the basic quantities by mathematical operations such as multiplication, division, differentiation, or integration.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Example 1

As shown in fig. 1, 2, 3 and 4, the light guide plate provided by the embodiment of the utility model comprises a backlight module, wherein the backlight module comprises a support member 10, a light emitting member 20 and a light guide plate main body 30, and the light emitting member 20 and the light guide plate main body 30 are both arranged in the support member 10; and the light emitting member 20 for emitting the light source 21 to the light guide plate body 30;

the light guide plate main body 30 comprises a light incident surface 31, a dot surface 32 and a light emergent surface 33, wherein the light incident surface 31 is connected between the dot surface 32 and the light emergent surface 33; the light-emitting surface 33 is provided with a plurality of V-shaped grooves 40;

the V-grooves 40 are disposed at an included angle 50, and the extending direction of the included angle 50 is parallel to the light source 21.

By adopting a mode that the light emitting piece 20 and the light guide plate main body 30 are arranged in the supporting piece 10, the light source 21 is emitted to the light guide plate main body 30 through the light emitting piece 20, and because the light guide plate comprises the light inlet surface 31, the dot surface 32 and the light outlet surface 33, the light inlet surface 31 is used for receiving the light source 21 and introducing the light source 21 into the light guide plate main body 30, when the light source 21 contacts the dot surface 32, the light source 21 can be emitted from the light outlet surface 33 of the light guide plate by utilizing the diffuse reflection principle of the dot surface 32, the light outlet surface 33 is provided with a plurality of V-shaped grooves 40, the V-shaped grooves 40 can concentrate light to the middle by utilizing the principle that the light outlet angle when light enters a low-density substance from a high-density substance is smaller than the incident angle, and meanwhile, the V-shaped grooves 40 are arranged in an included angle 50, and the extending direction of the included angle 50 is parallel to the light source 21, so that the light cannot move to two sides freely, and meanwhile, the light can be beneficial to move along the parallel direction of the V structure, the light is prevented from being rapidly refracted from the light outlet surface 33 in the prior art, the middle, the light outlet surface 21 is less, the light can be rapidly reflected from the light outlet surface 33 is formed, and the light can reach the two sides of the light guide plate because the light outlet structure is rapidly and the light outlet region is formed in the dark area; the existence of the dark area can directly influence the optical uniformity and the appearance quality of the backlight module, thereby further influencing the technical problems of the optical uniformity and the appearance quality of the liquid crystal display.

Further, the light emitting element 20 emits light at an angle of 120 ° to the light source 21, and the included angle 50 is 120 °.

In this embodiment, the angle of the included angle 50 between the light source 21 and the V-shaped groove 40 emitted by the light emitting element is 120 °, which can be favorable for the light emitted by the light source 21 to diverge along the inclined V-shaped groove 40, so as to guide more light to the side edge of the light emitting surface 33, avoid the dark area generated by the light emitting surface, and promote the viewing experience of the user.

It should be noted that, the angle of the included angle 50 between the light source 21 and the V-shaped groove 40 emitted by the light emitting element may be set to be 90 ° or 150 ° according to the actual requirement of the light guide plate, so that the V-shaped groove 40 is set to be an included angle 50 between two pairs, and the extending direction of the included angle 50 is parallel to the light source 21, that is, the included angle 50 between the V-shaped grooves 40 is adapted to the half-intensity angle of the light emitting element 20, which may also achieve the effect of improving the dark area.

Further, the V-groove 40 may also be a polygonal arrangement.

The V-shaped groove 40 may be provided in various shapes, i.e., the cross section of the V-shaped groove 40 may have a polygonal structure such as a V-shape, a semicircle, a trapezoid, etc.

Further, the dot surface 32 is provided with a plurality of dots for diffuse reflection of light by the dot surface 32. The dot surface 32 is provided with a plurality of dots, the dots can be arranged in a laser dotting and carving mode, and diffuse reflection of the dot surface 32 is realized by utilizing the principle of a three-dimensional grating, so that most light rays are dispersed along the light emitting surface 33.

Further, the light guide plate further includes a reflective sheet 60, the reflective sheet 60 is mounted in the supporting member 10, and the reflective sheet 60 is mounted at one end of the light guide plate body 30 facing the dot surface 32.

The reflective sheet 60 may be mounted in the supporting member 10 by plugging, screwing, or the like, in this embodiment, the reflective sheet 60 is mounted in the supporting member 10 by placing or pasting, and the reflective sheet 60 is mounted at one end of the light guide plate main body 30 facing the dot surface 32, so that the light escaping from the dot surface 32 can be reflected by the reflective sheet 60 and re-reflected into the light emitting surface 33, thereby improving the light utilization rate.

Further, the backlight module further includes a backlight module 70, wherein the backlight module 70 is mounted in the support 10, and the backlight module 70 is mounted at one end of the light guide plate body 30 facing the light emitting surface 33.

The surface of the light enhancement sheet 70 is provided with a plurality of optical cutting grooves, each optical cutting groove is formed by a first optical cutting surface and a second optical cutting surface, when the light source 21 transmits to the light enhancement sheet 70, the optical refraction action of the first optical cutting surface emits towards the expected direction of the light guide plate main body 30, and part of the refraction light deflected by the first optical cutting surface can fall on the second optical cutting surface and emit towards the expected surface of the light guide plate through the optical reflection action of the second optical cutting surface, so as to achieve the effect of increasing the brightness expression of the light guide plate.

Further, a diffusion sheet 80 is further included, and the diffusion sheet 80 is installed between the light increasing sheet 70 and the light guide plate body 30.

The diffusion sheet 80 is installed between the light enhancement sheet 70 and the light guide plate body 30, and the light of the light emitting surface 33 of the light guide plate body 30 can be atomized by the diffusion sheet 80 to achieve uniformity of the light. Further, the light guide plate body 30 is detachably coupled to the inside of the support member 10.

In the embodiment, the supporting member 10 is in a box structure, the light guide plate main body 30 is in a plate structure, and the light guide plate main body 30 can be connected in the supporting member 10 in an embedded connection mode, so that the installation and the disassembly of workers are facilitated, and the labor intensity is reduced;

further, the light emitting element 20 is mounted on the inner wall of the support element 10, and the light emitting element 20 is disposed on the side of the light guide plate body 30 facing the light incident surface 31.

The light emitting element 20 may be a part with a certain divergence angle, such as an LED lamp, and the light emitting element is mounted on the inner wall of the supporting element 10, and the light emitting element 20 is disposed on one side of the light guiding plate main body 30 facing the light incident surface 31, where the light incident surface 31 is disposed in a planar structure, so that the incident light is refracted once, and the incident light angle is further reduced to obtain refracted light.

In a second aspect, an embodiment of the present utility model further provides a liquid crystal display, including the above light guide plate, where the working principle of the light guide plate is described above, and is not described herein again.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.

Claims (10)

1. The light guide plate comprises a backlight module and is characterized by comprising a support piece (10), a light emitting piece (20) and a light guide plate main body (30), wherein the light emitting piece (20) and the light guide plate main body (30) are both arranged in the support piece (10); and the light emitting member (20) is used for emitting a light source (21) to the light guide plate main body (30);

the light guide plate main body (30) comprises a light incident surface (31), a mesh point surface (32) and a light emergent surface (33), wherein the light incident surface (31) is connected between the mesh point surface (32) and the light emergent surface (33); the light-emitting surface (33) is provided with a plurality of V-shaped grooves (40); the V-shaped grooves (40) are arranged in an included angle (50) between every two, and the extending direction of the included angle (50) is parallel to the light source (21).

2. The light guide plate according to claim 1, wherein the light emitting element (20) emits the light source (21) at an angle of 120 ° and the included angle (50) is 120 °.

3. A light guide plate according to claim 1, characterized in that the V-shaped groove (40) is also polygonal.

4. A light guide plate according to claim 1, characterized in that the dot surface (32) is provided with a plurality of dots for diffuse reflection of light by the dot surface (32).

5. The light guide plate according to claim 4, further comprising a reflective sheet (60), wherein the reflective sheet (60) is mounted in the supporting member (10), and wherein the reflective sheet (60) is mounted at an end of the light guide plate main body (30) facing the dot surface (32).

6. The light guide plate according to claim 4, further comprising a light enhancement sheet (70), wherein the light enhancement sheet (70) is mounted in the support member (10), and wherein the light enhancement sheet (70) is mounted at an end of the light guide plate main body (30) facing the light exit surface (33).

7. The light guide plate according to claim 6, further comprising a diffusion sheet (80), the diffusion sheet (80) being mounted between the light enhancement sheet (70) and the light guide plate body (30).

8. The light guide plate according to claim 1, characterized in that the light guide plate body (30) is detachably connected within the support (10).

9. The light guide plate according to claim 1, wherein the light emitting member (20) is mounted on an inner wall of the supporting member (10), and the light emitting member (20) is disposed on a side of the light guide plate main body (30) facing the light incident surface (31).

10. A liquid crystal display comprising the light guide plate according to any one of claims 1 to 9.