Light guide plate and backlight module thereof

Abstract

The invention relates to a light guide plate and a backlight module thereof. The light guide plate comprises a body part and a reinforcing part. The body portion has a first surface and a second surface. The reinforcing part is formed on at least one of the first surface and the second surface and comprises a plurality of columnar supporting units. The plurality of supporting units have light transmittance, the elastic recovery rate is larger than or equal to 95, and the supporting units are sequentially arranged and formed on the body part. The supporting units comprise at least one supporting unit formed in the center area of the body part and supporting units formed at the four corners of the body part respectively.

Description

Technical Field

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

[0002] The backlight module has been widely used in display technology. In the existing backlight module designs, whether it is a direct-lit or side-lighting backlight module, its basic components at least include components such as a light guide plate, a diffusion plate, and a reflector to achieve the guiding and diffusion of 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 materials. However, traditional light guide plate materials have various problems. Some of the main problems include poor optical performance, high processing difficulty, high manufacturing cost, consideration of the heat resistance and stability of the material itself, etc. In addition, since the backlight module must use additional components such as a diffusion plate and a reflector to optimize the optical performance, these additional components increase the cost and manufacturing difficulty during the production process, and at the same time, there will be reliability problems in the assembly between components. On the other hand, when the backlight module uses a light guide plate made of plastic materials, a rigid reinforcement plate attached to the light guide plate is usually required to provide rigid support, so as to prevent the plastic light guide plate from being bent due to force and affecting the display effect. However, setting a rigid reinforcement plate as a structural reinforcement may cause a significant increase in the cost of the backlight module. Summary of the Invention

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

[0005] An embodiment of the present invention provides a light guide plate, including 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 the light exit 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 opposite side of 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 brightness enhancement film. 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 the light exit 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 opposite side of the second surface, wherein the glossiness of the second surface is greater than 95.

[0007] An embodiment of the present invention provides a light guide plate, which includes a light incident surface, a first surface, a second surface, and a plurality of side surfaces. The first surface is substantially perpendicular to the light incident surface and serves as the light emitting surface of the light guide plate. The second surface is located on the other side relative to the first surface, wherein the glossiness of the second surface is greater than 95. The plurality of side surfaces are not parallel to the first surface and are connected to the first surface and the second surface, wherein the glossiness of at least one of the plurality of side surfaces is greater than 95.

[0008] In some embodiments of the present invention, a plurality of reflective film structures are formed on the light incident surface of the light guide plate, and the plurality of reflective film structures are arranged at fixed intervals, wherein the glossiness of each of the reflective film structures is greater than 95.

[0009] In some embodiments of the present invention, a plurality of reflective film structures are formed on the light incident surface, and each of the reflective film structures is formed in the interval area between adjacent light emitting elements.

[0010] An embodiment of the present invention provides a light guide plate, which includes a main body portion and a reinforcing portion. The main body portion has a first surface and a second surface. The reinforcing portion is formed on at least one of the first surface and the second surface and includes a plurality of columnar support units. The plurality of support units are light transmissive, the elastic recovery rate is greater than or equal to 95, and they are arranged in sequence on the main body portion. The plurality of support units include at least one support unit formed in the central area of the main body portion and support units respectively formed at the four corners of the main body portion.

[0011] In some embodiments of the present invention, the plurality of support units include a first support unit having a first height and a second support unit having a second height, wherein the first height is greater than the second height.

[0012] An embodiment of the present invention provides a backlight module, which includes the aforementioned light guide plate and a light emitting portion. The light emitting portion is disposed facing the light incident surface and includes a plurality of light emitting elements, wherein the plurality of light emitting elements are arranged at fixed intervals.

[0013] Through the technical solution of the present invention, the light guide plate and its backlight module provided by the embodiments of the present invention achieve structural reinforcement of the light guide plate by forming a columnar support unit structure on the main body portion of the light guide plate. Since there is no need to provide an additional rigid reinforcement plate, the cost of the overall backlight module can be effectively controlled. In addition, by configuring the first support unit and the second support unit with a height difference, a stepped support can be formed on the light guide plate to optimize the performance between the display effect and the structural protection. Description of the Drawings

[0014] Figure 1 Schematic diagram of a display device according to an embodiment of the present invention;

[0015] Figures 2A to 2E Schematic diagrams of the structural configurations of backlight modules according to different embodiments of the present invention;

[0016] Figures 3A to 3D Schematic diagrams of the configurations of light guide plates according to different embodiments of the present invention;

[0017] Figure 4A and Figure 4B Schematic diagrams of the coating structures of light incident surfaces according to different embodiments of the present invention; and

[0018] Figures 5A to 6D Schematic diagrams of the configurations of light guide plates according to different embodiments of the present invention. Detailed Embodiments

[0019] The present invention provides a light guide plate and its backlight module, which can provide effective structural support to avoid deformation, thereby enabling the rigid reinforcement plate to be omitted and reducing the cost of the backlight module. To make the above objects, features, and advantages of the technical solution of the present invention more obvious and understandable, the following will describe in detail the specific embodiments of the proposed technical solution with reference to the accompanying drawings. The descriptions of the embodiments of the technical solution of the present invention below are only for illustration and are not intended to represent all embodiments of the present invention or limit the present invention to specific embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0020] It should be noted that when an element is referred to as being "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right", "up", "down" and similar expressions used herein are only for indicating the relative positional relationship based on the drawings and do not limit the elements using the said terms to only be implemented in the indicated manner. When the absolute position of the described object changes, the description of the relative position may also change accordingly.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs. The terms used in the description of the present invention herein 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 of the related listed items.

[0022] Figure 1 Schematic diagram of a display device according to an embodiment of the present invention. Please refer to Figure 1, the display device 10 of this embodiment can be a non-self-emitting display device, such as a liquid crystal display device (LCD device), which includes a backlight module 100 and a display panel DP. The backlight module 100 and the display panel DP are disposed on the x-y plane, and the display panel DP is disposed on the backlight module 100 along the z-axis. The backlight module 100 is used to provide sufficient brightness and a uniformly distributed light source toward the display panel DP. The display panel DP is used to control and adjust the passing light for presenting corresponding images thereon. In this embodiment, the display device 10 can be any electronic device with a display function, such as a television, a screen, a laptop computer, or a mobile phone. The present invention is not limited thereto.

[0023] The backlight module 100 includes a light-emitting part 110, and the light-emitting part 110 includes a plurality of light-emitting elements LEDs arranged in an array. The light-emitting elements LEDs can be used to emit a light source toward the display panel DP. In some embodiments, the light-emitting elements LEDs can be white, red, green, or blue light-emitting diodes (or can be said to be light-emitting diodes with a light-emitting wavelength in the white, red, green, or blue wavelength range), or a combination of the above color light-emitting diodes. The present invention is not limited thereto.

[0024] In addition, in some embodiments, the backlight module 100 may further include a quantum dot film 120 and an optical adjustment layer 130. The quantum dot film 120 is disposed on the light-emitting part 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 part 110 and the optical adjustment layer 130. In the embodiments where the quantum dot film 120 is provided, the light-emitting elements LEDs can be, for example, blue light-emitting diodes.

[0025] The quantum dot film 120 is disposed on the light transmission path of the light-emitting part 110, and is used to adjust the wavelength of a part of the light emitted by the light-emitting elements LEDs, and allow another part of the light emitted by the light-emitting elements LEDs to pass directly without adjustment. For example, when the light-emitting elements LEDs emit light in the blue light wavelength range (such as 400nm - 520nm), the quantum dot film 120 can adjust the wavelength of the first part of the received light to the red light wavelength range (such as 610nm - 720nm), adjust the wavelength of the second part of the received light to the green light wavelength range (such as 520nm - 610nm), and directly output the third part of the received light without adjustment and maintain it in the blue light wavelength range. Thus, the first to third parts of the light emitted by the light-emitting part 110 can be mixed to form white light after passing through the quantum dot film 120.

[0026] The optical adjustment layer 130 is also located on the light transmission path of the light-emitting part 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 light direction (which will be further described in subsequent embodiments), but the present invention is not limited thereto.

[0027] The display panel DP includes, for example, a pixel array substrate, a counter substrate, and a non-self-luminous display medium, wherein the pixel array substrate and the counter substrate are disposed opposite to each other, and the non-self-luminous display medium is disposed between the pixel array substrate and the counter substrate. In some embodiments, the non-self-luminous display medium may be, for example, liquid crystal, but the present invention is not limited thereto.

[0028] Figures 2A to 2C It is a schematic structural configuration diagram of a backlight module according to different embodiments of the present invention, wherein Figure 2A is the structural configuration of a direct-lit backlight module 100a, and Figure 2B and Figure 2C are the structural configurations of side-lighting backlight modules 100b and 100c.

[0029] Please first refer to Figure 2A , the backlight module 100a includes a light-emitting part 110a and an optical adjustment layer 130a, wherein the optical adjustment layer 130a includes a light guide plate 131a, a diffusion plate 132, and a reflector 133. In this embodiment, the diffusion plate 132, the light guide plate 131a, the light-emitting part 110a, and the reflector 133 are arranged in sequence on the z-axis from the side close to the display panel DP to the side far from the display panel DP, and the components are substantially parallel to each other. In other words, in the backlight module 100a, the diffusion plate 132 is closest to the display panel DP, and the reflector 133 is the farthest from the display panel DP. Taking the display panel DP as being located on the uppermost side, it can be regarded that the light-emitting part 110a is disposed above the reflector 133, the light guide plate 131a is disposed above the light-emitting part 110a, and the diffusion plate 132 is disposed above the light guide plate 131a.

[0030] In some embodiments, the optical adjustment layer 130a may further include a brightness enhancement film 134, wherein the brightness enhancement film 134 is disposed above the diffusion plate 132, that is, disposed between the display panel DP and the diffusion plate 132. In other words, in the embodiment having the brightness enhancement film 134, the component closest to the display panel DP in the backlight module 100a may be the brightness enhancement film 134. However, the present invention is not limited thereto.

[0031] Specifically, the light guide plate 131a is used to make the light source provided by the light emitting part 110a emit light uniformly from the light emitting surface of the light guide plate 131a through the optical actions of refraction and / or reflection. In other words, after the light source provided by the light emitting part 110a passes through the light guide plate 131a, the light emitted towards the display panel DP can be emitted to each area of the display panel DP more evenly than when there is no light guide plate 131a. In this embodiment, the light emitting surface of the light guide plate 131a is the surface close to the display panel DP; and the light incident surface of the light guide plate 131a is located on the opposite side of the light emitting surface, that is, the surface close to the light emitting part 110a. In other words, the backlight module 100a of this embodiment belongs to a direct-lit configuration.

[0032] The light guide plate 131a of this embodiment can be made of any transparent material, such as glass or plastic materials (such as PMMA, MS, PS, etc.). The light guide plate 131a may include a plurality of optical microstructures, but the present invention is not limited thereto.

[0033] The diffusion plate 132 is used to further disperse and uniformly emit the received light to the entire display panel DP through the optical actions of scattering and refraction. In the configuration of this embodiment, one side of the diffusion plate 132 is disposed on the light emitting surface of the light guide plate 131a, and the other side is disposed corresponding to the display panel DP, so that the light emitted from the light emitting surface of the light guide plate 131a can be further more evenly dispersed to each area of the display panel DP after passing through the diffusion plate 132.

[0034] The diffusion plate 132 of this embodiment can be implemented by using a plastic sheet with a roughened surface or other transparent materials, but the present invention is not limited thereto. The diffusion plate 132 can be connected / assembled with the light guide plate 131a by pasting or other joining methods, but the present invention is also not limited thereto.

[0035] The reflector 133 is used to make the light that is not directed towards the display panel DP be reflected into light directed towards the display panel DP through the optical action of reflection, thereby improving the light source utilization rate of the light emitting part 110a. In the configuration of this embodiment, the light emitting part 110a is disposed on the reflecting surface of the reflector 133. Among the light emitted by the light emitting part 110a through the light guide plate 131a, some are emitted in a direction not parallel to the z-axis (that is, not directed towards the display panel DP).

[0036] The reflector 133 of this embodiment can be implemented using aluminum foil or a reflective material with a metal coating. The reflector 133 can be connected / assembled to the light guide plate 131a by pasting or other joining methods, but the present invention is not limited thereto. It should be noted that although the reflector 133 of this embodiment is illustrated as a sheet, the present invention is not limited thereto. In some embodiments, the reflector 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.

[0037] In an embodiment of the backlight module 100a including a brightness enhancement film 134, the brightness enhancement film 134 is used to increase the amount and incident angle of light through the optical actions 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 brightness enhancement film 134 is disposed on the diffusion plate 132 and is located between the display panel DP and the diffusion plate 132.

[0038] The brightness enhancement film 134 of this embodiment can be implemented using a transparent material coated with a high refractive index material, but the present invention is not limited thereto. The brightness enhancement film 134 can be connected / assembled to the diffusion plate 132 by pasting or other joining methods, but the present invention is not limited thereto.

[0039] More specifically, in the backlight module 100a, the light source emitted by the light-emitting portion 110a is emitted from its light-emitting surface through the optical action of the light guide plate 131a, and is sequentially provided to the display panel DP through the diffusion plate 132 and the brightness enhancement film 134. In addition, the light diffused from the periphery of components such as the light-emitting portion 110a and / or the light guide plate 131a is reflected back to the light guide plate 131a by the reflector 133, and the light is emitted to the display panel DP through a light path similar to the above. Please then refer to Figure 2B, the backlight module 100b includes a light emitting part 110b and an optical adjustment layer 130b, wherein the optical adjustment layer 130b includes a light guide plate 131b, a diffusion plate 132 and a reflector 133. In this embodiment, the diffusion plate 132, the light guide plate 131b and the reflector 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 part 110b is arranged on the side of the light guide plate 131b, and the light emitting direction of the light emitting part 110b is not parallel to the normal direction of the planes of the diffusion plate 132, the light guide plate 131b and the reflector 133. More specifically, the light emitting direction of the light emitting part 110b in this embodiment can be substantially perpendicular to the normal direction of the planes of the diffusion plate 132, the light guide plate 131b and the reflector 133. In the backlight module 100b, the diffusion plate 132 is closest to the display panel DP, and the reflector 133 is the farthest from the display panel DP. Taking the display panel DP being located on the uppermost side as an example, it can be regarded that the light guide plate 131b is arranged above the reflector 133, the diffusion plate 132 is arranged above the light guide plate 131b, and the light emitting part 110b is arranged on the side of the light guide plate 131b.

[0040] In some embodiments, the optical adjustment layer 130b may also include a brightness enhancement film 134, wherein the brightness enhancement film 134 is arranged above the diffusion plate 132, that is, arranged between the display panel DP and the diffusion plate 132. In other words, in the embodiments having the brightness enhancement film 134, the component closest to the display panel DP in the backlight module 100b may be the brightness enhancement film 134. However, the present invention is not limited thereto.

[0041] Specifically, the light guide plate 131b is used to make the light source provided by the light emitting part 110b emit light evenly from the light emitting surface of the light guide plate 131b through the optical actions of refraction and / or reflection. In other words, after the action of the light guide plate 131b on the light source provided by the light emitting part 110b, the light emitted towards the display panel DP can be emitted to each area of the display panel DP more evenly compared to when there is no light guide plate 131b. In this embodiment, the light emitting surface of the light guide plate 131b is the surface on the side close to the display panel DP; and the light incident surface of the light guide plate 131b is the side surface perpendicular / non-parallel to the light emitting surface, that is, the surface on the side close to the light emitting part 110b. In other words, compared with the foregoing Figure 2A embodiment, the backlight module 100b in this embodiment belongs to the side light incident type configuration. It should be noted here that although Figure 2B it is illustrated that the light emitting part 110b is arranged on the right side of the light guide plate 131b, the present invention is not limited thereto. In other embodiments, the light emitting part 110b may also be arranged on other sides of the light guide plate (in the drawings, such as the left side, the top side and the bottom side).

[0042] For the structural composition / connection configuration embodiments of the light guide plate 131b in this embodiment, reference can be made to the above Figure 2A description of the light guide plate 131a in the embodiment, which will not be repeated here.

[0043] The diffusion plate 132 is used to further disperse and evenly emit the received light to the entire display panel DP through the optical effects of scattering and refraction. In the configuration of this embodiment, one side of the diffusion plate 132 is arranged on the light-emitting surface of the light guide plate 131b, and the other side is arranged 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 evenly dispersed to each area of the display panel DP after passing through the diffusion plate 132.

[0044] For the structural composition / connection configuration embodiments of the diffusion plate 132 in this embodiment, reference can be made to the above Figure 2A description of the embodiment, which will not be repeated here.

[0045] The reflector 133 is used to reflect the received light through the optical effect of reflection, so that the light not facing the display panel DP can be reflected into the light facing the display panel DP, thereby improving the light source utilization rate of the light-emitting part 110b. In the configuration of this embodiment, the light guide plate 131b is arranged on the reflector 133, and the surface of the light guide plate 131b opposite to the light-emitting surface faces the reflecting surface of the reflector 133, so that part of the light emitted by the light guide plate 131b that is not facing the display panel DP is reflected back to the light guide plate 131b.

[0046] For the structural composition / connection configuration embodiments of the reflector 133 in this embodiment, reference can be made to the above Figure 2A description of the embodiment, which will not be repeated here.

[0047] In the embodiment of the backlight module 100b including the brightness enhancement film 134, the brightness enhancement film 134 is used to increase the quantity and incident angle of the 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 brightness enhancement film 134 is arranged on the diffusion plate 132 and is located between the display panel DP and the diffusion plate 132.

[0048] For the structural composition / connection configuration embodiments of the brightness enhancement film 134 in this embodiment, reference can be made to the above Figure 2A description of the embodiment, which will not be repeated here.

[0049] More specifically, in the backlight module 100b, the light source emitted by the light emitting part 110b is emitted from its light emitting surface through the optical action of the light guide plate 131b, and is sequentially provided to the display panel DP through the diffusion plate 132 and the brightness enhancement film 134. In addition, the light diffused from the peripheries of components such as the light emitting part 110b and / or the light guide plate 131b is reflected back to the light guide plate 131b by the reflector 133, and the light is emitted to the display panel DP through a light path similar to the above.

[0050] Compared with Figure 2A the direct - type backlight module 100a, in the backlight module 100b of this embodiment, the light emitting part 110b is located on the side of the light guide plate 131b instead of overlapping with the light guide plate 131b / reflector 133. Therefore, the thickness of the backlight module 100b can be effectively reduced.

[0051] In the above - mentioned backlight modules 100a and 100b, the light guide plates 131a / 131b can be made of plastic materials, for example. An embodiment of the present invention proposes a new structural design of a plastic light guide plate, which realizes the reinforcement of the overall rigidity by forming a transparent support structure on the surface of the light guide plates 131a / 131b. Furthermore, the backlight modules 100a / 100b no longer require additional rigid reinforcement plates to prevent the light guide plates 131a / 131b from deforming, so that the cost of the backlight modules 100a / 100b can be significantly reduced; at the same time, it will not affect the light emitting characteristics of the backlight modules 100a / 100b. The above - mentioned plastic light guide plate structural design will be further described in subsequent embodiments.

[0052] Please then refer to Figure 2C Figure, the backlight module 100c includes a light emitting part 110c and an optical adjustment layer 130c. Compared with the foregoing Figure 2A and Figure 2B Figure, the optical adjustment layer 130c of this embodiment may only include a light guide plate 131c and a reflector 133. Specifically, the light emitting surface (i.e., the light emitting surface or the surface close to the display panel DP) of the light guide plate 131c in this embodiment has undergone special surface treatment so that the light emitting surface of the light guide plate 131c has the optical properties of a diffusion plate (such as 132). Therefore, the backlight module 100c of this embodiment can omit the configuration of the diffusion plate, and the optical adjustment layer 130c only includes the light guide plate 131c and the reflector 133.

[0053] In some embodiments, the optical adjustment layer 130c may also include a brightness enhancement film 134, where the brightness enhancement film 134 is disposed on the upper side of the light guide plate 131c, that is, between the display panel DP and the light guide plate 131c, and one side of the brightness enhancement film 134 faces the light-emitting surface of the light guide plate 131c, and the opposite side of the brightness enhancement film 134 faces the display panel DP. In other words, in the embodiments having the brightness enhancement film 134, the component closest to the display panel DP in the backlight module 100c may be the brightness enhancement film 134. However, the present invention is not limited thereto.

[0054] More specifically, the light guide plate 131c of the present embodiment is made of a glass material, which refers to a material with transparent, brittle, and certain hardness characteristics, and the upper surface of the light guide plate 131c has the optical properties of a diffusion plate after surface treatment. Therefore, as Figure 2A and Figure 2B described, the diffusion plate 132 can be omitted in the backlight module 100c of the present embodiment.

[0055] Please then refer to Figure 2D , the backlight module 100d includes a light-emitting part 110d and an optical adjustment layer 130d. Compared with the foregoing Figure 2A and Figure 2B , the optical adjustment layer 130d of the present embodiment may only include a light guide plate 131d and a diffusion plate 132. Specifically, the surface of the light guide plate 131d of the present embodiment opposite to the light-emitting surface is subjected to special surface treatment so that the light guide plate 131d can have the optical properties of a reflector (such as 133). Therefore, the backlight module 100d of the present embodiment can omit the configuration of the reflector, and the optical adjustment layer 130d only includes the light guide plate 131d and the diffusion plate 132.

[0056] In some embodiments, the optical adjustment layer 130d may also include a brightness enhancement film 134, where the brightness enhancement film 134 is disposed on the upper side of the diffusion plate 132, that is, between the display panel DP and the diffusion plate 132. In other words, in the embodiments having the brightness enhancement film 134, the component closest to the display panel DP in the backlight module 100d may be the brightness enhancement film 134. However, the present invention is not limited thereto.

[0057] More specifically, the light guide plate 131d of the present embodiment is also made of glass, and the surface opposite to the light-emitting surface is subjected to surface treatment so that the surface has the optical properties of a reflector. Therefore, as Figure 2A and Figure 2B described, the reflector 133 can be omitted in the backlight module 100d of the present embodiment. Please then refer to Figure 2E , the backlight module 100e includes a light-emitting part 110e and an optical adjustment layer 130e, where compared with the foregoing Figure 2AAnd Figure 2B In this embodiment, the optical adjustment layer 130e may include only the light guide plate 131e. 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 surface opposite to the light-emitting surface) of the light guide plate 131e in this embodiment are respectively subjected to special surface treatments so that the light guide plate 131e can simultaneously have the optical properties of a diffusion plate (such as 132) and a reflector (such as 133). Therefore, in the backlight module 100e of this embodiment, the configurations of the diffusion plate and the reflector can be omitted, and the optical adjustment layer 130e only includes the light guide plate 131e.

[0058] In some embodiments, the optical adjustment layer 130e may also include a brightness enhancement film 134, where the brightness enhancement film 134 is disposed on the upper side of the light guide plate 131e, that is, disposed between the display panel DP and the light guide plate 131e, and one side of the brightness enhancement film 134 faces the light-emitting surface of the light guide plate 131e, and the opposite side of the brightness enhancement film 134 faces the display panel DP. In other words, in the embodiments having the brightness enhancement film 134, the component closest to the display panel DP in the backlight module 100e may be the brightness enhancement film 134. However, the present invention is not limited thereto.

[0059] More specifically, the light guide plate 131e of this embodiment is similar to the combination of the foregoing Figure 2C and Figure 2D embodiments, in which the upper surface of the light guide plate 131e made of glass has the optical properties of a diffusion plate after surface treatment, and its lower surface has the optical properties of a reflector after surface treatment. Therefore, as Figure 2A and Figure 2B described, the diffusion plate 132 and the reflector 133 can be omitted in the backlight module 100e of this embodiment.

[0060] Through the above Figures 2C to 2E configuration, the manufacturing process of the backlight module 100c / 100d / 100e can be further simplified, thereby improving production efficiency. At the same time, because the configurations of the diffusion plate and / or the reflector are omitted, the influence on light uniformity and durability considerations that may be caused when connecting components can also be improved simultaneously.

[0061] For example, if the light guide plate and the diffusion plate / reflector are assembled by adhesion, the optical performance of the backlight module may be affected by air bubbles during the adhesion process. Moreover, uneven pressure between components may also be caused due to uneven coating of the adhesive during adhesion (more serious in the case of large-size panels), which will also cause problems of decreased optical performance. By omitting the configurations of the diffusion plate and the reflector, the above problems can be improved simultaneously.

[0062] The following is used to Figures 3A to 3D further illustrate the aboveFigures 2C to 2E A specific structural example of the glass light guide plate described in the embodiment, wherein Figures 3A to 3D is a schematic diagram of the configuration of the light guide plates according to different embodiments of the present invention. Please first refer to Figure 3A , the light guide plate 231 includes a main body portion 2311, an optical microstructure 2312, and a reflection portion 2313. The optical microstructure 2312 is formed on one side of the main body portion 2311, and the reflection portion 2313 is formed on the opposite side of the main body portion 2311. The surface of the light guide plate 231 where the optical microstructure 2312 is formed is the first surface S1, and the first surface S1 faces the display panel DP (i.e., faces the brightness enhancement plate 134); the surface of the light guide plate 231 where the reflection portion 2313 is formed and is located on the opposite side of the main body portion 2311 is the second surface S2. In this embodiment, the first surface S1 is the light-emitting surface of the light guide plate 231.

[0063] Specifically, the first surface S1 of the light guide plate 231 (i.e., the surface of the optical microstructure 2312) is subjected to a frosted treatment to have a rough structure RS, thereby causing a decrease in the gloss 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 diffusion plate. In some embodiments, the gloss of the frosted first surface S1 can be, for example, less than 20; in some preferred embodiments, the gloss 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.

[0064] More specifically, since the light guide plate 231 is made of glass, a rough structure RS can be formed on the first surface S1 by frosting treatment methods such as sandblasting, grinding wheel, chemical etching, wet grinding, and texture printing. For example, in some embodiments, by immersing the first surface S1 of the light guide plate 231 in hydrofluoric acid, a rough structure RS as shown in Figure 3A can be formed on the surface of the optical microstructure 2312 / the first surface S1 without damaging the optical microstructure 2312. In this way, on the premise of ensuring the light guiding performance of the light guide plate 231, the gloss of the first surface S1 / the light-emitting surface can be reduced by roughening the surface of the optical microstructure 2312, and then the scattering and refracting optical properties of the diffusion plate are imparted to the first surface S1.

[0065] In some embodiments, the main body portion 2311 and the optical microstructure 2312 of the light guide plate 231 can be integrally formed.

[0066] In some embodiments, in addition to the above-mentioned frosting treatment method for forming the rough structure RS on the first surface S1, laser cutting and / or 3D printing can also be used to form the rough structure RS, and the present invention is not limited thereto.

[0067] On the other hand, the second surface S2 of the light guide plate 231 is subjected to a coating process, so that a reflective film is covered on the second surface S2 to form a reflective portion 2313. The reflective portion 1313 reflects light toward the first surface of the light guide plate 231. The material of the reflective film can be a metal material with high gloss, such as aluminum or silver, but the present invention is not limited thereto. After the above coating process, the reflective portion 2313 formed on the light guide plate 231 has the optical properties of a reflector, so it can replace the reflector 133 as shown in Figure 2A and Figure 2B .

[0068] In some embodiments, the gloss of the reflective portion 1313 can be, for example, greater than 95.

[0069] The light guide plate 231 of this embodiment can be applied to the backlight module 100e as described in Figure 2E . In addition, if the light guide plate 231 of this embodiment only performs the above-mentioned frosting process or other surface roughening process on the first surface S1 to reduce the gloss to have the optical properties of a diffuser plate, it can be used in the backlight module 100c as described in Figure 2C ; if the light guide plate 231 of this embodiment only performs a coating process on the second surface S2 to increase the gloss to have the optical properties of a reflector, it can be used in the backlight module 100d as described in Figure 2D .

[0070] Please refer to Figure 3B . The light guide plate 331 includes a main body portion 3311a and 3311b, an optical microstructure 3312, and a reflective portion 3313. The optical microstructure 3312 is formed between the main body portions 3311a and 3311b, and the optical microstructure 3312 and the reflective portion 3313 are formed on opposite sides of the main body portion 3311a. The surface of the main body portion 3311b away from the optical microstructure 3312 is the first surface S1, and the first surface S1 faces the display panel DP (i.e., faces the brightness enhancement film 134); the surface of the light guide plate 331 where the reflective portion 3313 is formed and is located on the opposite side of the main body portion 3311a is the second surface S2. In this embodiment, the first surface S1 is the light-emitting surface of the light guide plate 331.

[0071] Specifically, this embodiment is similar to the foregoing Figure 3A embodiment. The main difference is that the optical microstructure 3312 of this embodiment is formed between two main body portions 3311a and 3311b (i.e., located in the glass material). Therefore, the rough structure RS of this embodiment is formed on the main body portion 3311b, rather than on the surface of the optical microstructure 3312.

[0072] In this embodiment, the first surface S1 of the light guide plate 331 (i.e., the upper surface of the main body portion 3311b / the surface on the side away from the optical microstructure 3312) is subjected to a matte treatment to have a rough structure RS, thereby reducing the gloss 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 diffusion plate. Similarly, in some embodiments, the gloss of the first surface S1 subjected to the matte treatment may be, for example, less than 20; in some preferred embodiments, the gloss 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.

[0073] On the other hand, regarding the formation and configuration of the reflecting portion 3313, reference may be made to the description of the above Figure 3A embodiment, and details will not be repeated here.

[0074] Viewed from the perspective of the overall light guide plates 231 and 331, the light guide plates 231 / 331 can be regarded as including a light incident surface, a first surface S1, and a second surface S2. The first surface S1 serves as the light exit surface of the light guide plates 231 / 331, and is generally perpendicular to the light incident surface, and the second surface S2 is located on the opposite side of the light exit surface. Among them, the gloss of the first surface S1 is less than 20, and the gloss of the second surface S2 is greater than 80. In some embodiments, the gloss of the first surface S1 is less than 1, and the gloss of the second surface S2 is greater than 95. In some embodiments, the gloss of the first surface S1 is between 0.85 and 0.9, and the gloss of the second surface S2 is greater than 95.

[0075] Similar to the foregoing embodiments, the light guide plate 331 of this embodiment can be applied to, for example, Figure 2E the backlight module 100e as described. In addition, if only the first surface S1 of the light guide plate 331 of this embodiment is subjected to the above matte treatment or other surface roughening treatment to reduce the gloss to have the optical properties of a diffusion plate, it can be used in, for example, Figure 2C the backlight module 100c as described; if only the second surface S2 of the light guide plate 331 of this embodiment is coated to increase the gloss to have the optical properties of a reflector, it can be used in, for example, Figure 2D the backlight module 100d as described.

[0076] Please refer to Figure 3C , the light guide plate 431 of this embodiment includes a main body portion 4311, an optical microstructure 4312, and a reflecting portion 4313, wherein the cross-sectional structure of this embodiment is illustrated as being similar to Figure 3A the structure of the embodiment for schematic illustration, but the present invention is not limited thereto. The light guide plate 431 of this embodiment may also have a structure such as Figure 3B that.

[0077] This embodiment and the foregoing Figure 3A and Figure 3B embodiment are substantially the same. The main difference is that in addition to being formed on the second surface S2, the reflection portion 4313 of this embodiment also extends to at least a part of the side surface of the light guide plate 431.

[0078] Specifically, the side surfaces described herein are, for example, the surfaces S3 to S5 of the light guide plate 431 that are substantially perpendicular (or non-parallel) to the first surface S1 and / or the second surface S2 other than the light incident surface S0. Taking Figure 3C as an example, the side surfaces include, for example, the lower side surface S3, the left side surface S4, and the upper side surface S5 of the light guide plate 431.

[0079] In this embodiment, the reflective film on the reflection portion 4313 extends from the second surface S2 to at least one of the side surfaces S3 to S5. In some embodiments, the reflective film covers the second surface S2 and all the side surfaces S3 to S5. Through the above configuration of the reflection portion 4313, not only the light directed towards the second surface S2 will be reflected back towards the display panel, but the light in other directions can also be reflected by the reflective film on the side surfaces S3 to S5, so that the light source utilization rate can be further improved, and thus the brightness of the backlight module can be further increased.

[0080] The light guide plate 431 of this embodiment can be applied to the backlight module 100d as Figure 2D described (the first surface S1 is not subjected to surface roughening treatment), or applied to the backlight module 100e as Figure 2E described (the first surface S1 is subjected to surface roughening treatment), but the present invention is not limited thereto.

[0081] Please refer to Figure 3D , the light guide plate 531 of this embodiment includes a main body portion 5311, an optical microstructure 5312, and a reflection portion 5313. Among them, this embodiment is similar to the foregoing Figure 3C embodiment, so the relevant configuration description can refer to the description of the above embodiment and will not be repeated here. The main difference between this embodiment and the foregoing Figure 3C embodiment is that the light guide plate 531 of this embodiment further includes a reflective film structure 5314 arranged at intervals on its light incident surface S0.

[0082] Specifically, the reflective film structure 5314 on the light incident surface S0 is formed corresponding to the positions of the light-emitting elements LEDs on the light-emitting portion 110. Among them, the reflective film structure 5314 will be formed in the interval region between adjacent light-emitting elements LEDs to avoid blocking the light path of the light-emitting elements LEDs. By arranging the reflective film structures 5314 in an interval pattern in the interval region between adjacent light-emitting elements LEDs, the light guide plate 531 can effectively improve the light-emitting dark regions between the light-emitting elements LEDs, making the light emission of the backlight module more uniform.

[0083] The light guide plate 531 of this embodiment can also be applied to, for example, Figure 2D the backlight module 100d described above or Figure 2E the backlight module 100e described above. The present invention is not limited thereto. It should be noted that the above Figure 3C and Figure 3D Although the embodiments are illustrated with the light incident surface S0 being the right side surface of the light guide plate (i.e., the light-emitting portion 110 is arranged on the right side of the light guide plate), the present invention is not limited thereto. In other embodiments, the light-emitting portion 110 can be arranged on any one or more side surfaces according to design requirements, and the side surface on which the light-emitting portion 110 is arranged is regarded as the light incident surface.

[0084] The following uses Figure 4A and Figure 4B to further illustrate the configuration examples of the reflective film structure 5314 on the above-mentioned light incident surface S0. Please first refer to Figure 4A , the reflective film structure 5314a of this embodiment can be formed into a rectangular pattern and is located in the interval region between two adjacent light-emitting elements. In other words, the width of the reflective film structure 5314a is selected based on the distance between adjacent light-emitting elements, and the height of the reflective film structure 5314 is determined based on the thickness of the light guide plate.

[0085] Please then refer to Figure 4B , the reflective film structure 5314b of this embodiment can be formed into a circular / elliptical pattern and is also located in the interval region between two adjacent light-emitting elements. In other words, the diameter / major axis length of the reflective film structure 5314b is selected based on the distance between adjacent light-emitting elements.

[0086] The following uses Figures 5A to 6D to further illustrate the above-mentioned Figure 2A and Figure 2B specific structural examples of the plastic light guide plate described in the embodiments, where Figures 5A to 6D is a schematic diagram of the configuration of the light guide plate in different embodiments of the present invention.

[0087] Figures 5A to 5C is an embodiment with a first type of light guide plate structure. Please first refer to Figure 5A , where Figure 5AThe upper portion shows a side view of the light guide plate 631, and Figure 5A the lower portion shows a top view of the light guide plate 631. The light guide plate 631 of this embodiment includes a main body portion 6311 and reinforcing portions 6312a and 6312b, where the reinforcing portions 6312a and 6312b are respectively formed on opposite sides of the main body portion 6311. The surface of the light guide plate 631 where the reinforcing portion 6312a is formed is the first surface S1, and the first surface S1 faces the display panel DP (i.e., faces the brightness enhancement plate 134); the surface located on the opposite side of the main body portion 2311 is the second surface S2, and the second surface S2 faces the reflector 133. In this embodiment, the first surface S1 is the light-emitting surface of the light guide plate 631. Specifically, the reinforcing portions 6312a and 6312b respectively include a plurality of columnar support units SP, where the support units SP are light-transmissive and have a certain degree of rigidity. Taking the reinforcing portion 6312a as an example, the support unit SP has a height Ph and is arranged at intervals in sequence on the first surface S1, where the distance between adjacent support units SP is Pw. The height Ph of the support unit SP can be, for example, between 2 μm and 3 μm, but the present invention is not limited thereto.

[0088] More specifically, in this embodiment, the distance Pw between adjacent two columns of support units SP can be a fixed distance Pwc, and the distance Pw between adjacent two rows of support units SP can be a fixed distance Pwr. In other words, the support units SP in each row are arranged in sequence at a fixed distance Pwc, and the support units SP in each column are arranged in sequence at a fixed distance Pwr, thereby forming an array configuration on the first surface S1.

[0089] Although this embodiment shows the support units SP in a 5×5 array configuration as an example, the present invention is not limited thereto. In some embodiments, at least two support units SP in each row / column are disposed in the peripheral region of the light guide plate 631, where the peripheral region can be, for example, a region with a vertical distance from the edge of the main body portion 6311 between 0.01 mm and 0.5 mm, but the present invention is not limited thereto either.

[0090] In some embodiments, the fixed distances Pwc and Pwr can be designed according to the size of the light guide plate 631, and they can be the same or different, and the present invention is not limited thereto either.

[0091] In some embodiments, the transparency of the support unit SP may be, for example, greater than or equal to 99% (preferably 99.9%), and the elastic recovery rate (ER) of the support unit SP is greater than 95%, but the present invention is not limited thereto. In some embodiments, the support unit SP may be, for example, a PhotoSpacer formed on the main body portion 6311 by a photolithography process, and may be implemented using one or a combination of the following materials: Polymer, Oligomer, Photo Initiator, Curing Agent, Surfactant, and Solvent.

[0092] In some embodiments, the polymer may include, for example, an acrylic polymer, which is mainly used to improve the mechanical properties of the support unit SP and the developing characteristics during photolithography. The oligomer may include, for example, an acrylic multifunctional monomer, which is mainly used to adjust the mechanical properties and crosslinking density of the support unit SP, and may also be used to affect the developing characteristics. The photoinitiator is mainly used to control the curing degree, crosslinking density, and crosslinking formation control when the support unit SP is formed. The curing agent may include, for example, a thermal crosslinking monomer, which is mainly used to increase the mechanical strength after thermal baking. The surfactant can be used to adjust the surface tension and coating characteristics of the support unit SP before curing. The solvent is, for example, 1,2-propylene glycol monomethyl ether acetate (PGMEA), cyclohexanone, or 3-methoxybutyl acetate, which is mainly used to adjust the evaporation rate, leveling range of the photoresist, and compatibility with other solvents during the photolithography process.

[0093] Please then refer to Figure 5B , this embodiment is substantially the same as the foregoing Figure 5A embodiment. For similar parts, reference may be made to the description of the foregoing embodiment, and details will not be repeated herein. Figure 5B The main difference between this embodiment and Figure 5A the embodiment is that the arrangement configuration of the support unit SP in this embodiment is different. In this embodiment, the support units SP are arranged in an "X" shape in the central region Sc on the first surfaces S1 and S2 of the main body portion 6311. In the peripheral region outside the central region Sc, the support units SP are arranged in sequence at a fixed interval Pwc in the x direction and in sequence at a fixed interval Pwr in the y direction in a manner similar to Figure 5A .

[0094] From another perspective, the support units SP of this embodiment are arranged in sequence at a fixed interval Pwd1 in the first direction d1, and are also arranged in sequence at a fixed interval Pwd2 in the second direction d2 perpendicular to the first direction d1. Among them, the support units SP arranged along the first direction d1 and the support units SP arranged along the second direction d2 share the same support unit SP at the center point, thus forming an "X"-shaped arrangement configuration.

[0095] Please then refer to Figure 5C , this embodiment is substantially the same as the foregoing Figure 5A embodiment. For similar parts, reference can be made to the description of the above embodiment, and details will not be repeated here. Figure 5C The main difference between this embodiment and Figure 5A the embodiment is that the support units SP of this embodiment are arranged in a "rice"-shaped pattern on the first surfaces S1 and S2 of the main body portion 6311.

[0096] From another perspective, the support units SP of this embodiment are arranged in sequence at a fixed interval Pwd1 in the first direction d1, at a fixed interval Pwd2 in the second direction d2 perpendicular to the first direction d1, and are also arranged in sequence at fixed intervals Pwx and Pwy in the x-direction and y-direction respectively. Among them, the support units SP arranged along the first direction d1, the support units SP arranged along the second direction d2, and the support units SP arranged along the X-direction share the same support unit SP at the center point, thus forming a "rice"-shaped arrangement configuration.

[0097] Figures 6A to 6D This is an embodiment with a second type of light guide plate structure. Please first refer to Figure 6A , in which Figure 6A the upper part shows a side view of the light guide plate 731, and Figure 6AThe lower part shows a top view of the light guide plate 731. The light guide plate 731 of this embodiment includes a main body portion 7311 and reinforcing portions 7312a and 7312b, where the reinforcing portions 7312a and 7312b are respectively formed on opposite sides of the main body portion 7311. The surface of the light guide plate 731 where the reinforcing portion 7312a is formed is the first surface S1, and the first surface S1 faces the display panel DP (i.e., faces the brightness enhancement plate 134); the surface of the light guide plate 731 on the opposite side of the main body portion 7311 is the second surface S2, and the second surface S2 faces the reflector 133. In this embodiment, the first surface S1 is the light-emitting surface of the light guide plate 731. Specifically, the reinforcing portions 7312a and 7312b respectively include a plurality of columnar first support units SPm and second support units SPs, where the first support units SPm and the second support units SPs are both light-transmissive and have a certain degree of rigidity. Taking the reinforcing portion 7312a as an example, the first support unit SPm has a height Ph1, and the second support unit SPs has a height Ph2, where the height Ph1 is greater than the height Ph2, and the first support unit SPm and the second support unit SPs are formed on the first surface S1 at intervals. The distance between adjacent first support units SPm and second support units SPs is Pw. The height of the first support unit SPm can be, for example, between 2 μm and 3 μm, and the height Ph2 of the second support unit SPs can be, for example, between 1.5 μm and 2.5 μm, but the present invention is not limited thereto.

[0098] In this embodiment, the distance Pw between adjacent two columns of support units SP can be a fixed distance Pwc, and the distance Pw between adjacent two rows of support units SP can be a fixed distance Pwr. In other words, the support units SP in each row are arranged in sequence at a fixed distance Pwc, and the support units SP in each column are arranged in sequence at a fixed distance Pwr, thereby forming an array configuration on the first surface S1. In this embodiment, any support unit SPm / SPs and the adjacent support unit have different heights, where the "adjacent support unit" takes the support unit closest in the x direction or y direction as an example. For example, for any first support unit SPm, the second support units SPs are arranged above, below, left, and right thereof.

[0099] Specifically, since the height Ph2 of the second support unit SPs is less than the height Ph1 of the first support unit SPm, when the first support unit SPm is stressed and deformed / retracted, the second support unit SPs can provide further support when the first support unit SPm is deformed by stress to a certain extent, so as to prevent the body portion 7311 of the light guide plate 731 from being squeezed and bent. In other words, through the configuration of the first support unit SPm and the second support unit SPs, different support heights Ph1 and Ph2 can be provided on the light guide plate 731. Furthermore, when the light guide plate 731 is squeezed, the first support unit SPm and the second support unit SPs provide a stepped support force to prevent display defects.

[0100] More specifically, since each support unit SPm / SPs will still be relatively stressed at the support point on the body portion 7311 when subjected to stress, resulting in a slight deformation, there is a possibility that the display effect will be affected. Therefore, compared with Figure 5A the embodiment, in this embodiment, some of the first support units SPm are replaced with second support units SPs with a lower height. That is, through the configuration of the first support unit SPm and the second support unit SPs with a height difference, the number of support units SPm / SPs actually stressed in the normal state (i.e., the state where the stress applied to the light guide plate 731 by the front and rear components can be supported solely by the first support unit SPm) is reduced, and in the stressed state (i.e., the state where the first support unit SPm is deformed by stress to the extent that the stress reaches the second support unit SPs), the second support unit SPs provide additional support force, thereby achieving an optimized performance between the display effect and structural protection.

[0101] Please then refer to Figure 6B This embodiment is substantially the same as the foregoing Figure 6A embodiment. For similar parts, reference can be made to the description of the above embodiment, and details will not be repeated here. Figure 6B The main difference between this embodiment and Figure 6A the embodiment is that the arrangement configurations of the first support unit SPm and the second support unit SPs in this embodiment are different. In this embodiment, the first support unit SPm will be configured in the manner of Figure 5A , so the spacing between two adjacent first support units SPm is Pw. The second support unit SPs will be formed between adjacent first support units SPm and generally have the same spacing Pw' as the adjacent first support units SPm. In other words, the spacing Pw' will generally be slightly less than half of the spacing Pw.

[0102] From another perspective, the first support unit SPm and the second support unit SPs of this embodiment are arranged in sequence at a fixed interval Pwr in the x-direction or the y-direction (in this embodiment, it is illustrated as an example of arrangement in the y-direction, but the present invention is not limited thereto), wherein the first support unit SPm in each column is arranged in a staggered manner with the second support unit SPs in each column, so that there is a fixed interval Pwc between adjacent first support unit SPm and second support unit SPs.

[0103] Please then refer to Figure 6C , the support unit configuration of this embodiment is substantially the same as that of the foregoing Figure 5B embodiment, so the similar parts can refer to the description of the above embodiment and will not be repeated here. Figure 6C The embodiment and Figure 5B The main difference of the embodiment is that this embodiment uses the first support unit SPm and the second support unit SPs with different heights to form an "X"-shaped arrangement configuration, wherein in the first direction d1 and the second direction d2, the first support unit SPm and the second support unit SPs are arranged in a staggered manner at intervals, so as to achieve the Figure 6A effects described in the above

[0104] Please then refer to Figure 6D , the support unit configuration of this embodiment is substantially the same as that of the foregoing Figure 5C embodiment, so the similar parts can refer to the description of the above embodiment and will not be repeated here. Figure 6D The embodiment and Figure 5C The main difference of the embodiment is that this embodiment uses the first support unit SPm and the second support unit SPs with different heights to form a "rice"-shaped arrangement configuration, wherein in the x-direction, y-direction, first direction d1 and second direction d2, the first support unit SPm and the second support unit SPs are arranged in a staggered manner at intervals, so as to achieve the Figure 6A effects described in the above

[0105] From another perspective, in this embodiment, the first support unit SPm is provided at the center of the body portion 7311, and the second support unit SPs surround it as a step support.

[0106] It should be noted here that although the above Figures 5A to 6D embodiment mainly describes the reinforcing portion 7312a on the first surface S1, those skilled in the art should understand that a similar structural configuration can also be applied to the reinforcing portion 7312b on the second surface S2. In addition, the reinforcing portions 7312a and 7312b can have the same or different support structures, which is explained in advance here.

[0107] In addition to this, from the above Figures 5A to 6DIt can be found in the embodiments that the support units are at least formed in the central region (especially at the center) and the four corners of the main body portion to provide relatively stable structural support.

[0108] In summary, for the light guide plate and the backlight module proposed in the embodiments of the present invention, the structural reinforcement of the light guide plate is achieved by forming columnar support unit structures on the main body portion of the light guide plate. Since there is no need to provide an additional rigid reinforcement plate, the cost of the overall backlight module can be effectively controlled. In addition, by configuring the first support unit and the second support unit with a height difference, a stepped support can be formed on the light guide plate to optimize the performance between the display effect and the structural protection.

[0109] Although the present invention has been disclosed by the above embodiments, it is not intended to limit the present invention. Any person skilled in the art can make various changes and modifications to the above embodiments without departing from the spirit and scope of the present invention, and still fall within the technical scope protected by the present invention. Therefore, the protection scope of the present invention should be defined by the appended claims.

Claims

1. A light guide plate, characterized in that, Comprising: A main body portion having a first surface and a second surface; And A reinforcing portion formed on at least one of the first surface and the second surface and including a plurality of columnar support units, wherein the plurality of support units are light transmissive, have an elastic recovery rate greater than or equal to 95, and are arranged in sequence on the main body portion. Wherein the plurality of support units include at least one support unit formed in a central region of the main body portion and support units respectively formed at four corners of the main body portion.

2. The light guide plate according to claim 1, wherein The plurality of support units include a first support unit having a first height and a second support unit having a second height, wherein the first height is greater than the second height.

3. A backlight module, characterized in that, Comprising: The light guide plate according to claim 1; And A light emitting portion disposed toward the light incident surface and including a plurality of light emitting elements, wherein the plurality of light emitting elements are arranged at a fixed interval.

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