TWM596352U - Light guide plate and light source module - Google Patents

Abstract

A light guide plate and a light source module are provided. The light guide plate includes a body, a plurality of first strip-like microstructures and a plurality of second strip-like microstructures. The body has a light emitting surface, a bottom surface, and a light incident surface. The first strip-like microstructures are located on one of the light emitting surface and the bottom surface, and are arranged along a first direction. The second strip-like microstructures are located on the light incident surface and are arranged along a second direction.

Description

Light guide plate and light source module

The novel creation relates to a light guide plate and a light source module, and particularly to a light guide plate and a light source module with a microstructure.

Current electronic devices mostly use flat display modules to display images. Among them, the technology of liquid crystal display modules is more sophisticated and popular. However, since the display panel of the liquid crystal display module itself cannot emit light, there is a backlight module below the display panel to provide the light required for displaying the picture. The backlight module can be mainly divided into an edge type backlight module and a direct type backlight module. The edge-light type backlight module uses the light guide plate to guide the light emitted from the light source disposed on the light incident side of the light guide plate to the light exit surface of the light guide plate, thereby forming a surface light source. However, when the backlight module is poorly designed or under limited design conditions, the brightness of the last light emitted may not be uniform, and the brightness or color uniformity may be poor, even more serious The phenomenon of visual defects (MURA). In addition, when the backlight module has an optical microstructure with a specific arrangement pattern, it is also easy to cause a new Moiré pattern phenomenon due to the optical superposition of different specific arrangement patterns, thereby affecting the optical quality of the backlight module .

On the other hand, in the conventional design, a plurality of light-emitting diodes are arranged at intervals beside the light incident surface of the light guide plate. However, because the light-emitting diode has a high directivity, that is, it has a limited range of light-emitting angle, the area of the light guide plate close to the light-emitting diode and falling within the light-emitting angle range will form a bright area. In addition, dark areas are formed in areas outside the light emitting angle range. These bright areas and dark areas will cause uneven surface light sources provided by the light guide plate. This is a so-called hot spot phenomenon. In addition, in recent years, as the power of light-emitting diodes has been continuously improved, the number of light-emitting diodes disposed on the light-incident surface side of the light guide plate can be reduced to reduce product cost. However, when the number of light-emitting diodes is reduced, the distance between two adjacent light-emitting diodes will increase, which also causes the area of the dark area to become larger, making the surface light source more uneven, and thus making the hot spot phenomenon more serious.

The novel creation provides a light guide plate with good optical performance.

The novel creation provides a light source module with good optical performance.

A light guide plate created by the novel includes a plate body, a plurality of first strip-shaped microstructures and a plurality of second strip-shaped microstructures. The plate body has a light emitting surface, a bottom surface and a light incident surface, wherein the bottom surface is opposite to the light emitting surface, and the light incident surface connects the bottom surface and the light emitting surface. The first strip-shaped microstructures are located on one of the light emitting surface and the bottom surface, and the first strip-shaped microstructures are arranged along a first direction. The second strip-shaped microstructures are located on the light incident surface, wherein the second strip-shaped microstructures are arranged along a second direction.

A light source module created by the present invention includes a light guide plate and a light source. The light source is arranged beside the light incident surface, wherein the light source has a plurality of light emitting elements, the light emitting elements are arranged corresponding to the second strip-shaped microstructures, and the arrangement direction of the light emitting elements is parallel to the second direction.

In an embodiment of the invention, the first direction and the second direction are parallel to or perpendicular to each other.

In an embodiment of the present invention, the above light guide plate further includes a plurality of third strip-shaped microstructures located on the other of the light exit surface and the bottom surface, wherein the third strip-shaped microstructures are arranged along a third direction, The third direction is substantially perpendicular to the first direction.

In an embodiment of the invention, the extending direction of the first strip-shaped microstructure and the extending direction of the third strip-shaped microstructure are skewed to each other.

In an embodiment of the present invention, the cross-sections of the first strip-shaped microstructure, the second strip-shaped microstructure and the third strip-shaped microstructure are respectively columnar or pyramidal.

In an embodiment of the invention, the light guide plate further includes a plurality of light guide microstructures, which are located inside the plate body, and there is a gap between the light guide microstructures and the bottom surface.

In an embodiment of the present invention, the material of the board includes glass, and the board further includes a first side surface, a second side surface, and a third side surface, the first side surface and the third side The surface is opposite, the second side surface is opposite to the light incident surface, and at least one of the light exit surface, the bottom surface, the light incident surface, the first side surface, the second side surface, and the third side surface of the plate body is strengthened by chemical treatment .

In an embodiment of the present invention, at least one of the light emitting surface, the bottom surface, the light incident surface, the first side surface, the second side surface, and the third side surface of the above-mentioned plate body has a strengthening after chemical treatment Depth, and the refractive index of the portion of the plate body located in the strengthening depth is between 1.40 and 1.90.

In an embodiment of the invention, the first side surface and the third side surface are curved surfaces.

In an embodiment of the present invention, the light exit surface and the bottom surface are curved surfaces, and the sides of the light incident surface and the second side surface connected to the light exit surface and the bottom surface are curved lines.

In an embodiment of the invention, the light-emitting surface and the bottom surface are curved surfaces, and the sides connecting the first side surface and the third side surface to the light-emitting surface and the bottom surface are curved lines.

Based on the above, the light source module and the light guide plate can be diffused to eliminate hot spots by the configuration of the second strip-shaped microstructure, and also can be matched by the first strip-shaped microstructure and the third strip-shaped microstructure , Can effectively improve the defect (MURA) phenomenon, and then improve the optical quality of the light guide plate and the light source module. Moreover, the light source module and the light guide plate can further improve the optical quality of the light guide plate and the light source module by the arrangement of the light guide microstructures inside the light guide plate. In addition, the light source module and the light guide plate can also be chemically strengthened to increase the hardness of the surface portion of the plate body, and further to the surface portion of the plate body and the first strip-shaped microstructure and the second strip-shaped microstructure or the third strip Shape microstructure to perform optical matching of the refractive index, and further enhance the optical performance of the light guide plate and the light source module.

In order to make the above-mentioned features and advantages of the creation of the new model more obvious and understandable, the embodiments are specifically described below and described in detail in conjunction with the accompanying drawings.

FIG. 1 is a schematic structural diagram of a light source module according to an embodiment of the present invention. 2 is a schematic side view of the light source module of FIG. 1. 1 and 2, the light source module 200 of this embodiment includes a light guide plate 100 and a light source 210. For example, in this embodiment, the light source 210 may be a light bar including a plurality of light emitting elements LE, which is suitable for providing a light beam, and the light emitting elements LE may be light emitting diode (LED) elements, Laser diode (LD) or other kinds of light-emitting elements. Furthermore, these light-emitting elements LE may be monochromatic light-emitting diodes or multicolor light-emitting diodes. That is, the light beam may be a monochromatic light beam or a multi-color light beam.

On the other hand, in this embodiment, the light guide plate 100 is suitable for transmitting the light beam from the light source 210, and its material may be glass or plastic, and the plastic may include polymethyl methacrylate (PMMA) or polycarbonate (PC), But not limited to this. In addition, in this embodiment, although the light guide plates 100 are all illustrated as flat light guide plates, they can also be other types of light guide plates (such as wedge-shaped light guide plates or curved light guide plates), which is not limited in this embodiment .

Specifically, as shown in FIGS. 1 and 2, in this embodiment, the light guide plate 100 includes a plate body 110, a plurality of first strip-shaped microstructures 120, a plurality of second strip-shaped microstructures 130 and a plurality of Third strip microstructure 140. The board 110 has a light emitting surface SE, a bottom surface SB, a light incident surface SI, a first side surface SS1, a second side surface SS2 and a third side surface SS3, wherein the bottom surface SB is opposite to the light emitting surface SE, the first One side surface SS1 is opposed to the third side surface SS3, the second side surface SS2 is opposed to the light incident surface SI, and the light incident surface SI, the first side surface SS1, the second side surface SS2, and the third side surface SS3 are respectively connected to the bottom surface SB and light emitting surface SE.

Further, as shown in FIGS. 1 and 2, the first strip-shaped microstructure 120 is located on the light exit surface SE, and the third strip-shaped microstructure 140 is located on the bottom surface SB, wherein the first strip-shaped microstructure 120 is along the first direction D1 is arranged, and the third strip-shaped microstructures 140 are arranged along the third direction D3, and the third direction D3 is substantially perpendicular to the first direction D1. On the other hand, the second strip-shaped microstructures 130 are located on the light incident surface SI, where the second strip-shaped microstructures 130 are arranged along the second direction D2.

Furthermore, as shown in FIG. 1, the light emitting elements LE are arranged corresponding to the second strip-shaped microstructures 130, and the arrangement direction of the light emitting elements LE is parallel to the first direction D1 and the second direction D2. That is, in this embodiment, the first direction D1 is substantially parallel to the second direction D2. Moreover, as shown in FIG. 1, both the first direction D1 and the second direction D2 are parallel to the light incident surface SI, and the third direction D3 is parallel to the normal direction of the light incident surface SI. In other words, the third direction D3 is substantially It is perpendicular to the first direction D1 and the second direction D2.

In order to facilitate the description of the direction of each element or structure in the backlight module 200, a rectangular coordinate system is defined below, wherein the x-axis is substantially parallel to the first direction D1 and the second direction D2, and the y-axis is substantially parallel to the plate of the light guide plate 100 The normal direction of the bottom surface SB of the body 110 and the light emitting surface SE, and the z-axis is substantially parallel to the third direction D3 and perpendicular to the x-axis and the y-axis, but the rectangular coordinate system is only a coordinate with reference to the additional drawings. Therefore, the coordinate terms used are used to illustrate and not to limit the creation of this new type.

For example, as shown in FIGS. 1 and 2, in this embodiment, the second strip-shaped microstructure 130 extends linearly along the y-axis (vertical direction) on the light incident surface SI. Thus, in this embodiment After the light beam provided by the light source 210 enters the light guide plate 100 through the light incident surface SI, the light beam can be diffused by the configuration of the second strip-shaped microstructure 130, so that the light incident side formed by the light guide plate 100 can be eliminated The hot spot phenomenon in the bright and dark band areas provides a uniform surface light source 210. However, the creation of the present invention is not limited to this. In other embodiments not shown, the second strip-shaped microstructure 130 may also extend linearly along the x-axis (horizontal direction), or it may also appear on the light incident surface SI The bending curve extends as long as the light beam of the light source 210 can be diffused by the configuration of the second strip-shaped microstructure 130 to eliminate the hot spot phenomenon.

Next, after the light beam from the light source 210 enters the light guide plate 100 through the light incident surface SI, it can be transmitted through the total internal reflection (TIR) in the light guide plate 100, and the light beam can pass through these first The arrangement of the structure 120 and the third strip-shaped microstructure 140 changes the direction of travel, and then leaves the light guide plate 100 from the light exit surface SE. Furthermore, as shown in FIGS. 1 and 2, in this embodiment, the first strip-shaped microstructure 120 extends along the third direction D3 on the light exit surface SE, and the third strip-shaped microstructure 140 is on the bottom surface SB The top extends along the first direction D1. That is, in the present embodiment, the extending direction of the first strip-shaped microstructure 120 and the extending direction of the third strip-shaped microstructure 140 are substantially skewed to each other. As such, when the light beam leaves the light guide plate 100 by the arrangement of the first strip microstructure 120 and the third strip microstructure 140, the structure of the first strip microstructure 120 and the third strip microstructure 140 Matching to effectively improve the MURA phenomenon and the Moiré pattern phenomenon, and improve the optical quality of the light guide plate 100 and the light source module 200.

For example, as shown in FIGS. 1 and 2, the cross-sections of the first strip-shaped microstructure 120 and the second strip-shaped microstructure 130 are column-shaped, and the third strip-shaped microstructure 140 is pyramid-shaped, but the original New creations are not limited to this. In another embodiment not shown, the cross section of the first strip microstructure 120 and the cross section of the second strip microstructure 130 may also be pyramidal, and the third strip microstructure 140 may also be columnar. In other words, in this embodiment, the cross section of the first strip microstructure 120, the cross section of the second strip microstructure 130, or the cross section of the third strip microstructure 140 may be either columnar or pyramidal, respectively. , Or other shapes, as long as they can be properly optically matched, the light beam of the light source 210 can be diffused by the configuration of the second strip-shaped microstructure 130, and pass through the first strip-shaped microstructure 120 and the third strip-shaped microstructure The structure of the structure 140 can be matched to improve the MURA phenomenon and the Moiré pattern phenomenon.

In detail, when the cross-section of the first strip-shaped microstructure 120, the cross-section of the second strip-shaped microstructure 130 or the cross-section of the third strip-shaped microstructure 140 is cylindrical, the size of its radius of curvature is between 0.01 mm~ Between 0.5 mm. When the cross section of the first strip microstructure 120, the cross section of the second strip microstructure 130 or the cross section of the third strip microstructure 140 is pyramidal, the value of the apex angle of the second strip microstructure 130 may be between Between 30 degrees and 130 degrees, the value of the apex angle of the first strip microstructure 120 or the third strip microstructure 140 may be between 30 degrees and 130 degrees.

In addition, since the strip microstructures have the advantages of high transfer rate and good reproducibility in manufacturing, the first strip microstructure 120 and the second strip microstructure 130 or the third strip microstructure 140 The configuration can form the light guide plate 100 with good structural consistency. Thereby, the optical performance of the light source module 200 and the light guide plate 100 can be controlled, and it has good optical quality.

On the other hand, as shown in FIG. 2, in this embodiment, the light guide plate 100 further includes a plurality of light guide microstructures 150 located inside the plate body 110, and there is a pitch P between the light guide microstructure 150 and the bottom surface SB . For example, the light guide microstructure 150 can be formed in the plate body 110 by laser engraving. In this way, problems such as high brightness loss rate and low yield caused by other processes such as printing or inkjet process, or low transfer rate and abnormal light performance caused by etching process can be avoided, and further Improve the optical quality of the light guide plate 100 and the light source module 200.

In addition, in this embodiment, when the material of the plate body 110 is glass, the light exit surface SE, the bottom surface SB, the light entrance surface SI, the first side surface SS1, the second side surface SS2, and the third side surface of the plate body 110 At least one of SS3 is strengthened by chemical treatment. Further, when at least one of the light emitting surface SE, the bottom surface SB, the light incident surface SI, the first side surface SS1, the second side surface SS2, and the third side surface SS3 of the plate body 110 is chemically strengthened, it has a Strengthen the depth. The portion of the plate body 110 located in the strengthening depth has a high hardness, and can provide functions such as scratch resistance and wear resistance. In addition, the refractive index of the portion of the plate body 110 located at the strengthening depth is between 1.40 and 1.90. Thus, the light guide plate 100 can further strengthen the portion of the plate body 110 located at the strengthening depth and the first strip by chemical strengthening treatment. The microstructure 120 and the second strip-shaped microstructure 130 or the third strip-shaped microstructure 140 perform optical matching of the refractive index, and further improve the optical performance of the light guide plate 100 and the light source module 200.

In addition, in this embodiment, the light source module 200 may further include a reflective sheet RE. The reflection sheet RE is disposed below the bottom surface SB, and the bottom surface SB is located between the light exit surface SE and the reflection sheet RE to reflect the light beam emitted from the bottom surface SB back to the light guide plate 100, thereby improving light utilization efficiency.

In addition, according to different requirements, the light source module 200 may further include other elements. For example, the light source module 200 may further include at least one diffusion sheet DF and at least one prism sheet PM. The diffusion sheet DF and the prism sheet PM are sequentially stacked on the light emitting surface SE. In other embodiments, at least one of the diffusion sheet DF and the prism sheet PM may be omitted. The following embodiments can all be improved in the same way, and will not be repeated below.

Hereinafter, other embodiments of the light source module 200 will be described with reference to FIGS. 3 to 4, wherein the same or similar elements are denoted by the same or similar reference numbers, and will not be repeated below.

3 is a schematic side view of another light source module according to an embodiment of the present invention. 4 is a schematic side view of yet another light source module according to an embodiment of the present invention. 3 and 4, the light source module 400 and the light source module 600 are similar to the light source module 200 of FIG. 1, and the main differences are as follows. In the embodiments of FIGS. 3 and 4, the light guide plate 300 of the light source module 400 and the light guide plate 500 of the light source module 600 do not include the third strip-shaped microstructure 140, but only have the first strip-shaped microstructure 320. 520 configuration. Moreover, as shown in FIG. 3, in the embodiment of FIG. 3, when the first strip-shaped microstructures 320 and 520 are located on the light exit surface SE, the arrangement direction of the first strip-shaped microstructures 320 and 520 is the first direction D1 is substantially parallel to the second direction D2. However, as shown in FIG. 4, in the embodiment of FIG. 4, when the first strip-shaped microstructures 320 and 520 are located on the bottom surface SB, the arrangement direction of the first strip-shaped microstructures 320 and 520 is the first direction D1 , Is substantially perpendicular to the second direction D2.

In this way, when the light beam from the light source 210 enters the light guide plates 300 and 500 through the light incident surface SI, it can still be diffused to eliminate the hot spot phenomenon by the configuration of the second strip-shaped microstructure 130, and then through total internal reflection It passes through the light guide plates 300 and 500, and the light beam can change the direction of travel by the arrangement of these first strip-shaped microstructures 320 and 520, and then leave the light guide plates 300 and 500 from the light exit surface SE, which can also make the light guide plate 300, 500 and light source modules 400, 600 have good optical performance.

In addition, in the embodiments of FIGS. 3 and 4, the light guide plates 300 and 500 and the light source module 200 may also be provided with a third strip microstructure (not shown) that matches the first strip microstructure 320 and 520. And when the first strip-shaped microstructures 320 and 520 are located on one of the light-emitting surface SE and the bottom surface SB, the third strip-shaped microstructures (not shown) are located on the other of the light-emitting surface SE and the bottom surface SB, and In this embodiment, the arrangement direction of the first strip-shaped microstructures 320 and 520 (ie, the first direction D1) is substantially perpendicular to the arrangement direction of the third strip-shaped microstructures 140 (third direction D3). . In this way, the light source modules 400, 600 and the light guide plates 300, 500 can also effectively improve defects by matching the structures of the first strip microstructures 320, 520 and the third strip microstructure (not shown) (MURA ) Phenomenon and the Moiré pattern phenomenon to improve the optical quality of the light guide plates 300 and 500 and the light source modules 400 and 600 to achieve the aforementioned effects and advantages of the light guide plate 100 and the light source module 200. Repeat again.

It is worth noting that in the above-mentioned embodiment, although the surfaces of the board body 110 are exemplified by planes, the creation of the present invention is not limited thereto. In other embodiments, each surface of the plate body 110 can also be a curved surface, and corresponding adjustments can be made according to its optical requirements. Any person with ordinary knowledge in the art can refer to the new type of creation after referring to the new shape. Make appropriate changes to achieve similar effects and advantages as the aforementioned light guide plate 100 and light source module 200, but it should still fall within the scope of the new creation. In the following, some other embodiments will be cited as an illustration.

5-6B are schematic diagrams of different light guide plates according to an embodiment of the present invention. 5 to 6B, the light guide plate 100A, the light guide plate 100B, and the light guide plate 100C are similar to the light guide plate 100 of FIG. 1, and the main differences are as follows.

In the embodiment of FIG. 5, the first side surface SS1 and the third side surface SS3 of the light guide plate 100A are curved surfaces, and the first side surface SS1 and the third side surface SS3 are symmetrically curved outward. However, in the embodiment of FIG. 5, the second strip microstructure (not shown), the first strip microstructure 120 and the third strip are still disposed on the light incident surface SI, the light exit surface SE and the bottom surface SB Microstructure (not shown). In this way, when the light beam from the light source 210 enters the light guide plate 100A through the light incident surface SI, the light source module 200 using the light guide plate 100A can still be diffused by the configuration of the second strip-shaped microstructure (not shown) In order to eliminate hot spots, the light source module 200 using the light guide plate 100A can also effectively improve defects (MURA) by matching the first strip microstructure 120 and the third strip microstructure (not shown) Phenomenon, and improve the optical quality, and then achieve the aforementioned effects and advantages of the light guide plate 100 and the light source module 200, which will not be repeated here.

On the other hand, in the embodiment of FIG. 6A, the light exit surface SE and the bottom surface SB of the light guide plate 100B are curved surfaces, the light exit surface SE and the bottom surface SB are curved toward the light exit side of the light exit surface SE, and the light entrance surface SI and the second side surface The side of SS2 connected to the light exit surface SE and the bottom surface SB is a curve. In the embodiment of FIG. 6B, the light exit surface SE and the bottom surface SB of the light guide plate 100C are also curved surfaces, and the light exit surface SE and the bottom surface SB are also curved toward the light exit side of the light exit surface SE, but the difference from the embodiment of FIG. 6A is The sides connecting the first side surface SS1 and the third side surface SS3 to the light exit surface SE and the bottom surface SB are curved lines. In this way, when the light source module 200 adopts the light guide plate 100B or the light guide plate 100C, since the light exit surface SE is bent toward the light exit side, the light source module 200 using the light guide plate 100B or the light guide plate 100C can also adjust the parallax and improve the use Viewing comfort.

In addition, in the embodiments of FIGS. 6A to 6B, since the light guide plate 100B (or the light guide plate 100C) is still provided with the second strip-shaped microstructure 130 and the first strip on the light incident surface SI, the light exit surface SE and the bottom surface SB Microstructure 120 and the third strip microstructure 140, therefore, when the light beam from the light source 210 enters the light guide plate 100B (or the light guide plate 100C) through the light incident surface SI, it can still pass through the second strip microstructure 130 Configuration, to be diffused to eliminate hot spot phenomenon, and also by matching the first strip microstructure 120 and the third strip microstructure 140, can effectively improve the defect (MURA) phenomenon and Moiré pattern (Moiré pattern) Phenomenon, and the optical quality is improved, so that the light source module 200 using the light guide plate 100B or the light guide plate 100C can also achieve the effects and advantages of the aforementioned light guide plate 100 and the light source module 200, which will not be repeated here.

In summary, the light source module and the light guide plate created by the novel can be diffused to eliminate the hot spot phenomenon by the configuration of the second strip-shaped microstructure, and also by the first strip-shaped microstructure and the third The matching of the strip-shaped microstructures can effectively improve the MURA phenomenon and the Moiré pattern phenomenon, thereby improving the optical quality of the light guide plate and the light source module. Moreover, the light source module and the light guide plate can further improve the optical quality of the light guide plate and the light source module by the arrangement of the light guide microstructures inside the light guide plate. In addition, the light source module and the light guide plate can also be chemically strengthened to increase the hardness of the surface portion of the plate body, and further to the surface portion of the plate body and the first strip-shaped microstructure and the second strip-shaped microstructure or the third strip Shape microstructure to perform optical matching of the refractive index, and further enhance the optical performance of the light guide plate and the light source module.

100, 100A, 100B, 100C, 300, 500: light guide plate 110: plate body 120: The first strip microstructure 130: second strip microstructure 140: third strip microstructure 150: Light guide microstructure 200, 400, 600: light source module 210: light source D1: First direction D2: Second direction D3: Third direction DF: diffuser LE: light emitting element P: pitch PM: 珜鏡片 RE: reflector SE: light side SB: underside SI: light side SS1: first side surface SS2: Second side surface SS3: third side surface

FIG. 1 is a schematic structural diagram of a light source module according to an embodiment of the present invention. 2 is a schematic side view of the light source module of FIG. 1. 3 is a schematic side view of another light source module according to an embodiment of the present invention. 4 is a schematic side view of yet another light source module according to an embodiment of the present invention. 5-6B are schematic diagrams of different light guide plates according to an embodiment of the present invention.

100: light guide plate

110: plate body

120: The first strip microstructure

130: second strip microstructure

140: third strip microstructure

200: light source module

210: light source

D1: First direction

D2: Second direction

D3: Third direction

LE: light emitting element

SE: Light side

SB: underside

SI: light side

SS1: first side surface

SS2: Second side surface

SS3: third side surface

Claims (22)

A light guide plate, including: A plate body having a light emitting surface, a bottom surface and a light incident surface, wherein the bottom surface is opposite to the light emitting surface, and the light incident surface connects the bottom surface and the light emitting surface; A plurality of first strip-shaped microstructures located on one of the light-emitting surface and the bottom surface, wherein the first strip-shaped microstructures are arranged along a first direction; and A plurality of second strip-shaped microstructures are located on the light incident surface, wherein the second strip-shaped microstructures are arranged along a second direction. The light guide plate as described in item 1 of the patent application range, wherein the first direction and the second direction are parallel to or perpendicular to each other. The light guide plate as described in item 2 of the patent application scope further includes: A plurality of third strip-shaped microstructures are located on the other of the light-emitting surface and the bottom surface, wherein the third strip-shaped microstructures are arranged along a third direction, and the third direction is substantially perpendicular to the first direction . The light guide plate as described in item 3 of the patent application range, wherein the extending directions of the first strip-shaped microstructures and the extending directions of the third strip-shaped microstructures are skewed to each other. The light guide plate as described in item 3 of the patent application scope, wherein the cross-sections of the first strip-shaped microstructures, the second strip-shaped microstructures and the third strip-shaped microstructures are respectively columnar or pyramidal. The light guide plate as described in item 1 of the patent application scope further includes: A plurality of light guide microstructures are located inside the board, and there is a distance between the light guide microstructures and the bottom surface. The light guide plate as described in item 1 of the patent application scope, wherein the material of the plate body includes glass, and the plate body further includes a first side surface, a second side surface, and a third side surface, the first side The surface is opposite to the third side surface, the second side surface is opposite to the light incident surface, the light exit surface, the bottom surface, the light incident surface, the first side surface, the second side surface and the first At least one of the three side surfaces is chemically strengthened. The light guide plate according to item 7 of the patent application scope, wherein at least one of the light exit surface, the bottom surface, the light incident surface, the first side surface, the second side surface, and the third side surface of the plate body The chemical treatment has a strengthening depth, and the refractive index of the portion of the plate body located in the strengthening depth is between 1.40 and 1.90. The light guide plate as described in item 7 of the patent application range, wherein the first side surface and the third side surface are curved surfaces. The light guide plate as described in item 7 of the patent application range, wherein the light exit surface and the bottom surface are curved surfaces, and the side of the light incident surface and the second side surface connected to the light exit surface and the bottom surface is a curve. The light guide plate as described in item 7 of the patent application range, wherein the light exit surface and the bottom surface are curved surfaces, and the side of the first side surface and the third side surface connected to the light exit surface and the bottom surface is a curve. A light source module, including: A light guide plate, including: The plate body has a light exit surface, a bottom surface and a light incident surface, wherein the bottom surface is opposite to the light exit surface, and the light incident surface connects the bottom surface and the light exit surface; A plurality of first strip-shaped microstructures located on one of the light-emitting surface and the bottom surface, wherein the first strip-shaped microstructures are arranged along a first direction; and A plurality of second strip-shaped microstructures are located on the light incident surface, wherein the second strip-shaped microstructures are arranged along a second direction; and A light source disposed beside the light incident surface, wherein the light source has a plurality of light emitting elements, the light emitting elements are arranged corresponding to the second strip-shaped microstructures, and the arrangement direction of the light emitting elements is parallel to the second direction . The light source module of claim 12 of the patent application scope, wherein the first direction and the second direction are parallel to or perpendicular to each other. The light source module as described in item 12 of the patent application range, wherein the light guide plate further includes a plurality of third strip-shaped microstructures located on the other of the light exit surface and the bottom surface, wherein the third strip-shaped microstructures The structures are arranged along a third direction, which is substantially perpendicular to the first direction. The light source module of claim 14 in the patent application scope, wherein the extending directions of the first strip-shaped microstructures and the extending directions of the third strip-shaped microstructures are skewed to each other. The light source module according to item 14 of the patent application scope, wherein the cross-sections of the first strip-shaped microstructures, the second strip-shaped microstructures and the third strip-shaped microstructures are respectively columnar or pyramidal . The light source module as described in item 12 of the patent application range, wherein the light guide plate further includes a plurality of light guide microstructures located inside the plate body, and there is a gap between the light guide microstructures and the bottom surface. The light source module of claim 12 in the patent application scope, wherein the material of the plate body includes glass, and the plate body further includes a first side surface, a second side surface, and a third side surface, the first The side surface is opposite to the third side surface, the second side surface is opposite to the light incident surface, the light exit surface, the bottom surface, the light incident surface, the first side surface, the second side surface and the At least one of the third side surfaces is strengthened by chemical treatment. The light source module of claim 18, wherein at least one of the light emitting surface, the bottom surface, the light incident surface, the first side surface, the second side surface, and the third side surface of the board body One has a strengthening depth after chemical treatment, and the refractive index of the portion of the plate body located in the strengthening depth is between 1.40 and 1.90. The light source module of claim 18, wherein the first side surface and the third side surface are curved surfaces. The light source module of claim 18, wherein the light exit surface and the bottom surface are curved surfaces, and the side of the light incident surface and the second side surface connected to the light exit surface and the bottom surface is a curve. The light source module of claim 18, wherein the light exit surface and the bottom surface are curved surfaces, and the side of the first side surface and the third side surface connected to the light exit surface and the bottom surface is a curve.

Images