Light guide plate and backlight module thereof

Abstract

The invention discloses a light guide plate and a backlight module thereof. The light guide plate comprises a light surface, a first surface and a second surface. The first surface of the light guide plate is approximately perpendicular to the light incident surface and serves as the light emergent surface of the light guide plate, and the glossiness of the first surface is smaller than 1. The second surface of the light guide plate is located on the opposite side of the second surface, and the glossiness of the second surface is larger than 95.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a light guide plate and a backlight module thereof. Background Art

[0002] Backlight modules have been widely used in display technology. In the existing backlight module design, whether it is a direct-lit or side-lit backlight module, its basic components will at least include components such as a light guide plate, a diffuser plate and a reflector plate to guide and diffuse the light, so that the light can be evenly irradiated to each area of ​​the display panel to achieve a better display effect.

[0003] As one of the key components of the backlight module, the light guide plate is usually made of plastic material. However, there are many problems with traditional light guide plate materials, some of which include poor optical performance, difficult processing, high production cost, and considerations of the heat resistance and stability of the material itself. In addition, since the backlight module must use additional components such as diffusers and reflectors to optimize optical performance, these additional components increase costs and manufacturing difficulties during the production process, and there will also be reliability issues in the assembly between components. Summary of the invention

[0004] The object of the present invention is to provide a light guide plate and a backlight module thereof to solve the above problems.

[0005] An embodiment of the present invention provides a light guide plate, comprising a light incident surface, a first surface, and a second surface. The first surface of the light guide plate is substantially perpendicular to the light incident surface and serves as a light emitting surface of the light guide plate, wherein the glossiness of the first surface is less than 1. The second surface of the light guide plate is located on the other side opposite to the second surface, wherein the glossiness of the second surface is greater than 95.

[0006] An embodiment of the present invention provides a backlight module suitable for providing a backlight source for a display panel. The backlight module is composed of a light guide plate and a light enhancement plate. The light guide plate includes a light incident surface, a first surface, and a second surface. The first surface of the light guide plate is substantially perpendicular to the light incident surface and serves as a light emitting surface of the light guide plate, wherein the glossiness of the first surface is less than 1. The second surface of the light guide plate is located on the other side opposite to the second surface, wherein the glossiness of the second surface is greater than 95.

[0007] Through the technical solution described in the present invention, the light guide plate and the backlight module thereof proposed in the embodiment of the present invention can effectively simplify the manufacturing process of the backlight module, thereby improving the production efficiency. At the same time, because the configuration of the diffusion plate and the reflection plate can be omitted, the influence of light uniformity and durability considerations that may be caused when connecting between components can also be improved at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 is a schematic diagram of a display device according to an embodiment of the present invention;

[0009] FIG. 2A to FIG. 2C Schematic diagrams of the structural configuration of backlight modules according to different embodiments of the present invention; and

[0010] Figure 3A and Figure 3B Schematic diagrams of configurations of light guide plates according to different embodiments of the present invention. DETAILED DESCRIPTION

[0011] The present invention proposes a light guide plate and a backlight module thereof, which can simultaneously possess the optical properties of a diffuser plate and a reflector plate, so that the manufacturing process of the backlight module can be effectively simplified. In order to make the above-mentioned purposes, features and advantages of the technical solution more obvious and easy to understand, the specific embodiments of the proposed technical solution are described in detail below in conjunction with the accompanying drawings. The following descriptions of the various embodiments of the technical solution of the present invention are only for illustration and illustration, and do not represent all embodiments of the present invention or limit the present invention to specific embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work should fall within the scope of protection of the present invention.

[0012] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or there may also be a centered element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a centered element at the same time. The terms "vertical", "horizontal", "left", "right", "upper", "lower" and similar expressions used herein are only intended to indicate relative positional relationships based on the accompanying drawings, and are not intended to limit the elements using the terms to only be implemented in a representative manner. When the absolute position of the object being described changes, the description of the relative position may also change accordingly.

[0013] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0014] Figure 1 FIG. 1 is a schematic diagram of a display device according to an embodiment of the present invention. Figure 1The display device 10 of the present embodiment may be a non-self-luminous display device, such as a liquid crystal display device (LCD device), which includes a backlight module 100 and a display panel DP, wherein the backlight module 100 and the display panel DP are arranged on the xy plane, and the display panel DP is arranged on the backlight module 100 along the z axis. The backlight module 100 is used to provide sufficient brightness and uniformly distributed light to the display panel DP. The display panel DP is used to control and adjust the light passing therethrough, so as to present a corresponding image thereon. In the present embodiment, the display device 10 may be any electronic device having a display function, such as a television, a screen, a laptop computer or a mobile phone, but the present invention is not limited thereto.

[0015] The backlight module 100 includes a light emitting portion 110, wherein the light emitting portion 110 includes a plurality of light emitting elements LEDs arranged in an array. The light emitting elements LEDs can be used to emit light toward the display panel DP. In some embodiments, the light emitting elements LEDs can be white light, red light, green light or blue light emitting diodes (or light emitting diodes with a wavelength between white light, red light, green light or blue light), or a combination of the above light emitting diodes, but the present invention is not limited thereto.

[0016] In addition, in some embodiments, the backlight module 100 may further include a quantum dot film 120 and an optical adjustment layer 130, wherein the quantum dot film 120 is disposed on the light emitting portion 110, and the optical adjustment layer 130 is disposed on the quantum dot film 120, that is, the quantum dot film 120 is disposed between the light emitting portion 110 and the optical adjustment layer 130. In the embodiment provided with the quantum dot film 120, the light emitting element LEDs may be, for example, blue light emitting diodes.

[0017] The quantum dot film 120 is disposed on the light transmission path of the light emitting portion 110, and is used to adjust the wavelength of a portion of the light emitted by the light emitting element LEDs, and allows another portion of the light emitted by the light emitting element LEDs to pass directly without adjustment. For example, when the light emitting element LEDs emit light in the blue light wavelength range (e.g., 400nm to 520nm), the quantum dot film 120 can adjust the wavelength of the first portion of the received light to the red light wavelength range (e.g., 610nm to 720nm), adjust the wavelength of the second portion of the received light to the green light wavelength range (e.g., 520nm to 610nm), and directly output the third portion of the received light without adjustment, that is, maintaining it in the blue light wavelength range. In this way, the first to third portions of light emitted by the light emitting portion 110 can be mixed to form white light after passing through the quantum dot film 120.

[0018] The optical adjustment layer 130 is also located on the light transmission path of the light emitting unit 110 and is used to adjust the direction of the received light so that the transmitted light source is more uniform. In some embodiments, the optical adjustment layer 130 includes a plurality of optical microstructures and / or optical films for adjusting the direction of the light (further described in subsequent embodiments), but the present invention is not limited thereto.

[0019] The display panel DP includes, for example, a pixel array substrate, an opposite substrate, and a non-self-luminous display medium, wherein the pixel array substrate and the opposite substrate are arranged opposite to each other, and the non-self-luminous display medium is arranged between the pixel array substrate and the opposite substrate. In some embodiments, the non-self-luminous display medium may be, for example, liquid crystal, but the present invention is not limited thereto.

[0020] FIG. 2A to FIG. 2C Schematic diagram of the structure configuration of the backlight module according to different embodiments of the present invention, wherein Figure 2A The structure configuration of the direct-lit backlight module 100a, and Figure 2B and Figure 2C The backlight modules 100b and 100c are of the side-light type.

[0021] Please refer to Figure 2A , the backlight module 100a includes a light emitting portion 110a and an optical adjustment layer 130a, wherein the optical adjustment layer 130a includes a light guide plate 131a, a diffuser plate 132 and a reflector plate 133. In the present embodiment, the diffuser plate 132, the light guide plate 131a, the light emitting portion 110a and the reflector plate 133 are arranged in sequence from the side close to the display panel DP to the side far from the display panel DP on the z-axis, and the components are substantially parallel to each other. In other words, in the backlight module 100a, the diffuser plate 132 is closest to the display panel DP, and the reflector plate 133 is farthest from the display panel DP. From the perspective that the display panel DP is located at the uppermost side, it can be regarded that the light emitting portion 110a is arranged on the upper side of the reflector plate 133, the light guide plate 131a is arranged on the upper side of the light emitting portion 110a, and the diffuser plate 132 is arranged on the upper side of the light guide plate 131a.

[0022] In some embodiments, the optical adjustment layer 130a may further include a light enhancement plate 134, wherein the light enhancement plate 134 is disposed on the upper side of the diffusion plate 132, that is, disposed between the display panel DP and the diffusion plate 132. In other words, in the embodiment with the light enhancement plate 134, the component closest to the display panel DP in the backlight module 100a may be the light enhancement plate 134. However, the present invention is not limited thereto.

[0023] Specifically, the light guide plate 131a is used to refract and / or reflect the light source provided by the light emitting portion 110a so that the light can be uniformly emitted from the light emitting surface of the light guide plate 131a. In other words, after the light source provided by the light emitting portion 110a passes through the light guide plate 131a, the light emitted toward the display panel DP can be more evenly emitted to each area of ​​the display panel DP compared to when there is no light guide plate 131a. In the present embodiment, the light emitting surface of the light guide plate 131a is the surface close to one side of the display panel DP; and the light incident surface of the light guide plate 131a is located on the other side opposite to the light emitting surface, that is, the surface close to the light emitting portion 110a. In other words, the backlight module 100a of the present embodiment is a direct-down configuration.

[0024] The light guide plate 131a of this embodiment may be made of any transparent material, such as glass or plastic material (such as PMMA, MS, PS, etc.), wherein the light guide plate 131a may include a plurality of optical microstructures, but the invention is not limited thereto.

[0025] The diffuser 132 is used to diffuse and refract the received light, so that the light can be further dispersed and evenly distributed to the entire display panel DP. In the configuration of this embodiment, one side of the diffuser 132 is configured on the light emitting surface of the light guide plate 131a, and the other side is configured corresponding to the display panel DP, so that the light emitted from the light emitting surface of the light guide plate 131a will be further and more evenly dispersed to each area of ​​the display panel DP after passing through the diffuser 132.

[0026] The diffuser plate 132 of this embodiment can be made of a plastic sheet or other transparent material with a roughened surface, but the invention is not limited thereto. The diffuser plate 132 can be connected / assembled with the light guide plate 131a by gluing or other bonding methods, but the invention is not limited thereto.

[0027] The reflector 133 is used to reflect the received light through an optical effect, so that the light not directed toward the display panel DP can be reflected into the light directed toward the display panel DP, thereby improving the light source utilization rate of the light emitting unit 110a. In the configuration of this embodiment, the light emitting unit 110a is configured on the reflective surface of the reflector 133, wherein part of the light emitted by the light emitting unit 110a through the light guide plate 131a is emitted in a direction not parallel to the z-axis (i.e., not directed toward the display panel DP).

[0028] The reflective plate 133 of the present embodiment can be implemented by using aluminum foil or a reflective material with a metal coating, wherein the reflective plate 133 can be connected / assembled with the light guide plate 131a by pasting or other bonding methods, but the present invention is not limited thereto. It should be noted that although the reflective plate 133 of the present embodiment is illustrated as a sheet, the present invention is not limited thereto. In some embodiments, the reflective plate can extend to the side of the light emitting portion 110a in response to the packaging structure of the backlight module 100a, thereby improving the reflection efficiency.

[0029] In the embodiment of the backlight module 100a including the light-enhancing plate 134, the light-enhancing plate 134 is used to increase the amount and incident angle of light through the optical effects of refraction and reflection, so that the received light can be further diffused toward the display panel DP, thereby improving the brightness and viewing angle of the overall light source. In the configuration of this embodiment, the light-enhancing plate 134 is configured on the diffusion plate 132 and is located between the display panel DP and the diffusion plate 132.

[0030] The light enhancement plate 134 of this embodiment can be implemented by using a transparent material coated with a high refractive index material, but the invention is not limited thereto. The light enhancement plate 134 can be connected / assembled with the diffusion plate 132 by gluing or other bonding methods, but the invention is not limited thereto.

[0031] More specifically, in the backlight module 100a, the light emitted by the light emitting portion 110a is emitted from the light emitting surface thereof through the optical effect of the light guide plate 131a, and is sequentially provided to the display panel DP through the diffusion plate 132 and the light enhancement plate 134. In addition, the light diffused from the periphery of the light emitting portion 110a and / or the light guide plate 131a and other components is reflected back to the light guide plate 131a by the reflection plate 133, and the light is emitted to the display panel DP through a light path similar to the above.

[0032] Please refer to Figure 2BThe backlight module 100b includes a light emitting portion 110b and an optical adjustment layer 130b, wherein the optical adjustment layer 130b includes a light guide plate 131b, a diffuser plate 132, and a reflector plate 133. In the present embodiment, the diffuser plate 132, the light guide plate 131b, and the reflector plate 133 are arranged in sequence from the side close to the display panel DP to the side far from the display panel DP on the z-axis, and the components are substantially parallel to each other. The light emitting portion 110b is arranged on the side of the light guide plate 131b, wherein the light emitting direction of the light emitting portion 110b is not parallel to the normal direction of the planes of the diffuser plate 132, the light guide plate 131b, and the reflector plate 133. More specifically, the light emitting direction of the light emitting portion 110b of the present embodiment may be substantially perpendicular to the normal direction of the planes of the diffuser plate 132, the light guide plate 131b, and the reflector plate 133. In the backlight module 100b, the diffuser 132 is closest to the display panel DP, and the reflector 133 is farthest from the display panel DP. From the viewpoint that the display panel DP is located at the uppermost side, it can be considered that the light guide plate 131b is disposed on the upper side of the reflector 133, the diffuser 132 is disposed on the upper side of the light guide plate 131b, and the light emitting portion 110b is disposed on the side of the light guide plate 131b.

[0033] In some embodiments, the optical adjustment layer 130bf may also include a light enhancement plate 134, wherein the light enhancement plate 134 is disposed on the upper side of the diffusion plate 132, that is, disposed between the display panel DP and the diffusion plate 132. In other words, in the embodiment with the light enhancement plate 134, the component closest to the display panel DP in the backlight module 100b may be the light enhancement plate 134. However, the present invention is not limited thereto.

[0034] Specifically, the light guide plate 131b is used to refract and / or reflect the light source provided by the light emitting portion 110b so that the light can be uniformly emitted from the light emitting surface of the light guide plate 131b. In other words, after the light source provided by the light emitting portion 110b passes through the light guide plate 131b, the light emitted toward the display panel DP can be more evenly emitted to each area of ​​the display panel DP compared to when there is no light guide plate 131b. In the present embodiment, the light emitting surface of the light guide plate 131b is the surface close to the display panel DP; and the light incident surface of the light guide plate 131b is the side surface that is perpendicular / non-parallel to the light emitting surface, that is, the surface close to the light emitting portion 110b. In other words, compared to the aforementioned Figure 2A In the embodiment, the backlight module 100b of the present embodiment is of a side-lighting type. Figure 2B The light emitting portion 110b is shown to be disposed on the right side of the light guide plate 131b, but the present invention is not limited thereto. In other embodiments, the light emitting portion 110b may also be disposed on other sides of the light guide plate (such as the left side, top side, and bottom side in the figure).

[0035] For details about the structure and connection configuration of the light guide plate 131b of this embodiment, please refer to the above Figure 2A The description of the light guide plate 131a of the embodiment will not be repeated here.

[0036] The diffuser 132 is used to diffuse and refract the received light, so that the light can be further dispersed and evenly distributed to the entire display panel DP. In the configuration of this embodiment, one side of the diffuser 132 is configured on the light emitting surface of the light guide plate 131b, and the other side is configured corresponding to the display panel DP, so that the light emitted from the light emitting surface of the light guide plate 131b will be further and more evenly dispersed to each area of ​​the display panel DP after passing through the diffuser 132.

[0037] For the structural composition / connection configuration of the diffuser plate 132 of this embodiment, please refer to the above Figure 2A The description of the embodiments will not be repeated here.

[0038] The reflector 133 is used to reflect the received light through an optical effect, so that the light not directed toward the display panel DP can be reflected into the light directed toward the display panel DP, thereby improving the light source utilization rate of the light emitting portion 110b. In the configuration of this embodiment, the light guide plate 131b is configured on the reflector 133, wherein the surface of the light guide plate 131b opposite to the light emitting surface faces the reflective surface of the reflector 133, so that part of the light emitted by the light guide plate 131b that is not directed toward the display panel DP is reflected to the light guide plate 131b.

[0039] For the structural composition / connection configuration embodiment of the reflector 133 of this embodiment, please refer to the above Figure 2A The description of the embodiments will not be repeated here.

[0040] In the embodiment of the backlight module 100b including the light-increasing plate 134, the light-increasing plate 134 is used to increase the amount and incident angle of light through the optical effects of refraction and reflection, so that the received light can be further diffused toward the display panel DP, thereby improving the brightness and viewing angle of the overall light source. In the configuration of this embodiment, the light-increasing plate 134 is configured on the diffusion plate 132 and is located between the display panel DP and the diffusion plate 132.

[0041] For the structural composition / connection configuration of the brightness enhancement plate 134 of this embodiment, please refer to the above Figure 2A The description of the embodiments will not be repeated here.

[0042] More specifically, in the backlight module 100b, the light emitted by the light emitting portion 110b is emitted from the light emitting surface thereof through the optical effect of the light guide plate 131b, and is sequentially provided to the display panel DP through the diffusion plate 132 and the light enhancement plate 134. In addition, the light diffused from the periphery of the light emitting portion 110b and / or the light guide plate 131b and other components is reflected back to the light guide plate 131b by the reflection plate 133, and the light is emitted to the display panel DP through a light path similar to the above.

[0043] Compared to Figure 2A For the direct-type backlight module 100a, the light emitting portion 110b of the backlight module 100b of this embodiment is located at the side of the light guide plate 131b instead of overlapping with the light guide plate 131b / reflection plate 133, so the thickness of the backlight module 100b can be effectively reduced.

[0044] Please refer to Figure 2C The backlight module 100c includes a light emitting portion 110c and an optical adjustment layer 130, wherein compared to the aforementioned Figure 2A and Figure 2B , the optical adjustment layer 130 of this embodiment may only include the light guide plate 131c. Specifically, the upper surface (i.e., the light emitting surface or the surface close to the display panel DP) and the lower surface (i.e., the other side surface opposite to the light emitting surface) of the light guide plate 131c of this embodiment are respectively subjected to special surface treatments, so that the light guide plate 131c can have the optical properties of both the diffusion plate (such as 132) and the reflection plate (such as 133). Therefore, the backlight module 100c of this embodiment can omit the configuration of the diffusion plate and the reflection plate, and the optical adjustment layer 130 only includes the light guide plate 131.

[0045] In some embodiments, the optical adjustment layer 130 may also include a light enhancement plate 134, wherein the light enhancement plate 134 is disposed on the upper side of the light guide plate 131, that is, disposed between the display panel DP and the light guide plate 131c, and one side of the light enhancement plate 134 is oriented toward the light emitting surface of the light guide plate 131c, and the other side of the light enhancement plate 134 is oriented toward the display panel DP. In other words, in the embodiment with the light enhancement plate 134, the component closest to the display panel DP in the backlight module 100c may be the light enhancement plate 134. However, the present invention is not limited thereto.

[0046] More specifically, the light guide plate 131c of the present embodiment is made of glass material, which is a material that is transparent, brittle and has a certain hardness. The upper surface of the light guide plate 131c has the optical properties of a diffuser after surface treatment, and the lower surface of the light guide plate 131c has the optical properties of a reflector after surface treatment. Figure 2A and Figure 2BThe diffuser plate 132 and the reflector plate 133 can be omitted in the backlight module 100c of this embodiment. In this way, the manufacturing process of the backlight module 100c can be further simplified, thereby improving the production efficiency. At the same time, because the configuration of the diffuser plate and the reflector plate is omitted, the light uniformity effect and durability considerations that may be caused when connecting between components can also be improved at the same time.

[0047] For example, if the light guide plate and the diffuser / reflector are assembled by gluing, the optical performance of the backlight module may be affected by air bubbles during the gluing process. Furthermore, uneven pressure between components may be caused by uneven adhesive coating during gluing (more serious in the case of large-sized panels), which may also cause the problem of reduced optical performance. By omitting the configuration of the diffuser and reflector, the above problems can be improved at the same time.

[0048] Below Figure 3A and Figure 3B The specific structural example of the light guide plate 131c is further described, wherein FIG3 is a schematic diagram of the configuration of the light guide plate according to an embodiment of the present invention. Figure 3A , the light guide plate 131c includes a support portion 1311, an optical microstructure 1312 and a reflective portion 1313, wherein the optical microstructure 1312 is formed on one side of the support portion 1311, and the reflective portion 1313 is formed on the other side of the support portion 1311. The surface of the light guide plate 131c on the side where the optical microstructure 1312 is formed is a first surface S1, and the first surface S1 faces the display panel DP (i.e., faces the light enhancement plate 134); the surface of the light guide plate 131c on the side where the reflective portion 1313 is formed and located on the other side of the support portion 1311 is a second surface S2. In this embodiment, the first surface S1 is the light emitting surface of the light guide plate 131c.

[0049] Specifically, the first surface S1 of the light guide plate 131c (i.e., the surface of the optical microstructure 1312) is frosted to have a rough structure RS, thereby reducing the glossiness of the first surface S1, so that the light passing through the first surface S1 is scattered and refracted, and thus has the optical characteristics of a diffuser. In some embodiments, the glossiness of the frosted first surface S1 may be, for example, less than 20; in some preferred embodiments, the glossiness of the first surface S1 may be less than 1, for example, between 0.85 and 0.9, but the present invention is not limited thereto.

[0050] More specifically, since the light guide plate 131c is made of glass, a rough structure RS can be formed on the first surface S1 by a frosting method such as sandblasting, grinding wheel, chemical etching, wet grinding, and texture printing. For example, in some embodiments, by soaking the first surface S1 of the light guide plate 131c with hydrofluoric acid, a rough structure RS can be formed on the surface of the optical microstructure 1312 / first surface S1 without damaging the optical microstructure 1312. Figure 3A The rough structure RS shown in the figure. In this way, the glossiness of the first surface S1 / light emitting surface can be reduced by roughening the surface of the optical microstructure 1312 while ensuring the light guiding performance of the light guide plate 131c, thereby giving the first surface S1 the optical properties of scattering and refraction of the diffuser.

[0051] In some embodiments, the support portion 1311 and the optical microstructure 1312 of the light guide plate 131c may be integrally formed.

[0052] In some embodiments, in addition to the above-mentioned frosting method for forming the rough structure RS on the first surface S1 , the rough structure RS may also be formed by laser cutting and / or 3D printing, but the present invention is not limited thereto.

[0053] On the other hand, the second surface S2 of the light guide plate 131c is subjected to a coating process, so that a layer of reflective film is covered on the second surface S2 to form a reflective portion 1313. The reflective portion 1313 reflects light toward the first surface of the light guide plate 131c, wherein the material of the reflective film can be a high-gloss metal material, such as aluminum or silver, but the present invention is not limited thereto. After the above-mentioned coating process, the reflective portion 1313 formed on the light guide plate 131c will have the optical properties of a reflective plate, and thus can replace the reflective plate 1313 formed on the light guide plate 131c. Figure 2A and Figure 2B The reflecting plate 133 shown in FIG.

[0054] In some embodiments, the glossiness of the reflective portion 1313 may be greater than 95, for example.

[0055] Please refer to Figure 3B, the light guide plate 231c includes support parts 2311a and 2311b, an optical microstructure 2312 and a reflective part 2313, wherein the optical microstructure 2312 is formed between the support parts 2311a and 2311b, and the optical microstructure 2312 and the reflective part 2313 are formed on opposite sides of the support part 2311a. The surface of the support part 2311b away from the optical microstructure 2312 is a first surface S1, and the first surface S1 faces the display panel DP (i.e., faces the light enhancement plate 134); the surface of the light guide plate 231c on which the reflective part 2313 is formed and located on the other side of the support part 2311a is a second surface S2. In this embodiment, the first surface S1 is the light emitting surface of the light guide plate 231c.

[0056] Specifically, this embodiment and the aforementioned Figure 3A The embodiment is similar, the main difference is that the optical microstructure 2312 of this embodiment is formed between the two layers of support parts 2311a and 2311b (that is, located in the glass material), so the rough structure RS of this embodiment is formed on the support part 2311b instead of being formed on the surface of the optical microstructure 2312.

[0057] In this embodiment, the first surface S1 of the light guide plate 231c (i.e., the upper surface of the support portion 2311b / the surface on the side away from the optical microstructure 2312) is frosted to have a rough structure RS, thereby reducing the glossiness of the first surface S1, so that the light passing through the first surface S1 is scattered and refracted, and thus has the optical characteristics of a diffuser. Similarly, in some embodiments, the glossiness of the frosted first surface S1 can be, for example, less than 20; in some preferred embodiments, the glossiness of the first surface S1 can be less than 1, for example, between 0.85 and 0.9, but the present invention is not limited thereto.

[0058] On the other hand, the formation and configuration of the reflector 2313 can refer to the above Figure 3A The description of the embodiments will not be repeated here.

[0059] From the perspective of the light guide plates 131c and 231c as a whole, the light guide plates 131c / 231c can be regarded as including a light incident surface, a first surface S1 and a second surface S2. The first surface S1, as the light emitting surface of the light guide plate 131c, is substantially perpendicular to the light incident surface, and the second surface S2 is located on the other side opposite to the light emitting surface. The glossiness of the first surface S1 is less than 20, and the glossiness of the second surface S2 is greater than 80. In some embodiments, the glossiness of the first surface S1 is less than 1, and the glossiness of the second surface S2 is greater than 95. In some embodiments, the glossiness of the first surface S1 is between 0.85 and 0.9, and the glossiness of the second surface S2 is greater than 95.

[0060] In summary, the light guide plate and its backlight module proposed in the embodiment of the present invention perform special treatments on the two side surfaces of the light guide plate made of glass material respectively, so that the light emitting surface of the light guide plate can have low glossiness, and the other surface relative to the light emitting surface has high glossiness, thereby having the optical properties of both the diffuser plate and the reflector plate. Therefore, the manufacturing process of the backlight module using the light guide plate can be effectively simplified, thereby improving production efficiency. At the same time, because the configuration of the diffuser plate and the reflector plate is omitted, the light uniformity effect and durability considerations that may be caused when the components are connected can also be improved at the same time.

[0061] Although the present invention has been disclosed using the above embodiments, they are not intended to limit the present invention. Any person skilled in the art may make various changes and modifications to the above embodiments without departing from the spirit and scope of the present invention, and the technical scope protected by the present invention is still within the scope of the present invention. Therefore, the scope of protection of the present invention shall be based on the definition of the claims.

Claims

1. A light guide plate, characterized in that: include: Light-entering surface; A first surface, substantially perpendicular to the light incident surface and serving as a light emitting surface of the light guide plate, wherein the glossiness of the first surface is less than 1; as well as The second surface is located on the other side opposite to the second surface, wherein the glossiness of the second surface is greater than 95.

2. A backlight module, suitable for providing a backlight source for a display panel, characterized in that: The backlight module consists of the following components composition: The light guide plate according to claim 1: and The light enhancement plate is assembled with the light guide plate and is located on a side close to the display panel.

Images