TWM619356U - Light guide plate and light source module - Google Patents

Abstract

A light guide plate includes a plate body, a plurality of first strip-shaped structures and a plurality of second strip-shaped structures. The plate body has a light incident surface and a light exit surface. The plurality of first strip-shaped structures and the plurality of second strip-shaped structures are disposed on the light exit surface. The plurality of first strip-shaped structures and the plurality of second strip-shaped structures extend along an extension direction from the light incident surface facing away from the light incident surface, and the plurality of first strip-shaped structures and the plurality of second strip-shaped structures are arranged along an arrangement direction. There is a space between any two adjacent first strip-shaped structures. The space gradually changes along the arrangement direction from one side of the plurality of first strip-shaped structures to the other side. At least one of the plurality of second strip-shaped structures is disposed at the space between any two adjacent first strip-shaped structures. A light source module having the light guide plate is further provided.

Description

Light guide plate and light source module

This creation is related to a light source module, and particularly to a light guide plate and a light source module using the light guide plate.

Generally, a liquid crystal display device includes a liquid crystal display panel and a backlight module, and since the liquid crystal display panel itself does not emit light, it is necessary to rely on the backlight module to provide the display light source to the liquid crystal display panel. Therefore, the main function of the backlight module is to provide a high-brightness and high-uniformity display light source.

Backlight modules can be divided into side-type backlight modules and direct-type backlight modules. In the current side-lit backlight module, when matched with a high-directivity microstructure and a film with better light collection, it is easy to cause most of the light to be concentrated in the center of the screen. Although this method can effectively improve the light utilization rate, it is easy to cause brightness contrast between the left and right sides and the center, and a partial dark band is formed on the left and right sides.

By adjusting the spacing between the microstructures, the above situation can be reduced. However, when the pitch is too large to exceed a certain range, a line stripe path may be generated on the picture from the light to the display panel, which will affect the overall picture taste.

This "prior art" paragraph is only used to help understand the content of this creation, so the content disclosed in the "prior art" may contain some conventional technologies that do not constitute the knowledge of those with ordinary knowledge in the technical field. In addition, the content disclosed in the "prior art" does not represent the content or the problem to be solved by one or more embodiments of this creation, nor does it mean that it has been used by a person with ordinary knowledge in the technical field before this creation application. Know or recognize.

This creation provides a light guide plate that can improve the brightness and light uniformity without affecting the taste of the displayed picture.

This creation provides a light source module that can improve brightness and light uniformity without affecting the taste of the display screen.

Other purposes and advantages of this creation can be further understood from the technical features disclosed in this creation.

In order to achieve one or part or all of the above objectives or other objectives, the light guide plate provided by an embodiment of the present creation includes a plate body, a plurality of first strip structures and a plurality of second strip structures. The board has a light-incident surface and a light-emitting surface, and the light-emitting surface is adjacent to the light-incident surface. The plurality of first strip-shaped structures are arranged on the light-emitting surface. The plurality of first strip-shaped structures extend from a direction close to the light-incident surface toward an extension direction away from the light-incident surface, and the first strip-shaped structures are arranged along the arrangement direction. The extension direction is not parallel to the arrangement direction. There is a space between any two adjacent first strip structures. The pitch gradually changes from one side of the first strip-like structures to the other side along the arrangement direction. A plurality of second strip-shaped structures are arranged on the light-emitting surface. The plurality of second strip-shaped structures extend in the extending direction, and the second strip-shaped structures are arranged along the arrangement direction. At least one of the plurality of second strip-shaped structures is arranged at a distance between any two adjacent first strip-shaped structures.

In an embodiment of the present creation, the distance between any two adjacent second strip-shaped structures mentioned above is the same.

In an embodiment of the present creation, the distance between each of the above-mentioned first strip-shaped structures and the second strip-shaped structure adjacent to the second strip-shaped structure is the same as that of any two adjacent second strip-shaped structures. The distance between the strips.

In an embodiment of the present creation, the distance between any two adjacent second strip structures described above gradually changes from one of any two adjacent first strip structures to the other along the arrangement direction.

In an embodiment of the present creation, the distance between the above-mentioned distances is proportional to the number of the plurality of second strip-shaped structures arranged therebetween.

In an embodiment of the present creation, the above-mentioned distance gradually changes in an arithmetic progression from one side of the plurality of first strip-shaped structures to the other side along the arrangement direction.

In an embodiment of the present creation, the aforementioned distance gradually increases and then gradually decreases along the arrangement direction from one side of the plurality of first strip-shaped structures to the other side.

In an embodiment of the present creation, the aforementioned distance gradually decreases from one side of the plurality of first strip-shaped structures to the other side along the arrangement direction in a manner of gradually decreasing and then increasing.

In an embodiment of the present creation, the above-mentioned distance gradually changes from one side of the plurality of first strip-like structures to the other side along the arrangement direction.

In an embodiment of the present creation, the above-mentioned distance gradually decreases from one side of the plurality of first strip-shaped structures to the other side along the arrangement direction.

In an embodiment of the present creation, the range of the above-mentioned distance is 0.01 μm-10mm.

In an embodiment of the present creation, the lengths of the plurality of first strip-shaped structures in the extending direction are greater than 0 and less than 500 mm, and the lengths of the plurality of second strip-shaped structures in the extending direction are greater than 0 and less than 500 mm. .

In an embodiment of the present creation, the distance between the vertices of the plurality of first strip-shaped structures and the light-emitting surface is greater than 0 and less than 200 mm, and the distance between the vertices of the plurality of second strip-shaped structures and the light-emitting surface It is greater than 0 and less than 100 mm.

In an embodiment of this creation, the width of the plurality of first strip structures in the arrangement direction is greater than 0 and less than 200 mm, and the width of the plurality of second strip structures in the arrangement direction is greater than 0 and less than 100 mm. .

In an embodiment of the present creation, the cross-sectional shapes of the plurality of first strip structures and the plurality of second strip structures in the direction parallel to the arrangement direction include semicircles and triangles.

In an embodiment of the present creation, the distance between the vertices of the plurality of first strip-shaped structures and the light-emitting surface starts from the end of the first strip-shaped structures close to the light-incident surface toward the end far away from the light-incident surface. After increasing, the distance between the vertices of the second strip structures and the light exit surface gradually increases from the end of these second strip structures close to the light entrance surface to the end far away from the light entrance surface. Gradually gradually decrease.

In an embodiment of the present creation, the distance between the vertices of the plurality of first strip-shaped structures and the light-emitting surface gradually decreases from the end of the first strip-shaped structures close to the light-incident surface to the end far away from the light-incident surface. Then, it gradually increases. The distance between the vertices of the second strip-shaped structures and the light-emitting surface gradually decreases from the end of the second strip-shaped structures close to the light-incident surface to the end far away from the light-incident surface. The way of increasing is gradual.

In an embodiment of the present creation, the aforementioned light-emitting surface has a space adjacent to the light-incident surface. The space does not have a plurality of first strip structures and a plurality of second strip structures and is a flat surface. The space area The distance from the side adjacent to the light incident surface to the side adjacent to the first strip-shaped structures and the second strip-shaped structures is greater than 0 and less than 100 mm.

In order to achieve one or part or all of the above-mentioned purposes or other purposes, the light source module provided by an embodiment of the present creation includes a light-emitting element and the above-mentioned light guide plate. The light-emitting element is arranged opposite to the light-incident surface of the board.

In the light source module of this creative embodiment, by adjusting the arrangement method of the multiple strip-like structures on the light guide plate, the spacing between any two adjacent multiple strip-like structures shows a gradual trend in the arrangement direction, which can make the light Transfer to the dark zone area, and then achieve the effect of improving the brightness and light uniformity of the dark zone area. In the case that the light-emitting element has different light-emitting intensity corresponding to the light-incident surface, it can also be adjusted to a suitable gradual parameter. Under the design structure of the light guide plate of this creative embodiment, while improving the brightness and light uniformity of the dark zone area, it can also maintain the brightness of the bright zone area without a significant decrease. On the other hand, since at least one of the second strip structures is arranged between any two adjacent first strip structures, the gap between the first strip structure and the light-emitting surface due to the excessively large distance can be reduced. The difference in height between the two causes the uneven light and dark lines on the display screen, thereby enhancing the taste of the display screen. Since the light source module of this creative embodiment uses the above-mentioned light guide plate, it also has the effect of improving the brightness and light uniformity of the dark zone area without affecting the taste of the display screen.

In order to make the above and other purposes, features and advantages of this creation more obvious and easy to understand, the following is a detailed description of preferred embodiments in conjunction with the accompanying drawings.

The aforementioned and other technical content, features and effects of this creation will be clearly presented in the following detailed description of a preferred embodiment with reference to the drawings. The directional terms mentioned in the following embodiments, for example: up, down, left, right, front or back, etc., are only directions for referring to the attached drawings. Therefore, the directional terms used are used to illustrate and not to limit this creation.

FIG. 1 is a three-dimensional schematic diagram of a light source module according to an embodiment of the creation. Fig. 2 is a schematic cross-sectional view taken along the line A-A' of Fig. 1. Please refer to FIG. 1 and FIG. 2, the light source module 1 of this embodiment includes a light guide plate 10 and a light emitting element 20. The light guide plate 10 includes a plate body 100, a plurality of first strip structures 200 and a plurality of second strip structures 300. The board 100 has a light-incident surface 110, a light-emitting surface 120, two opposite side surfaces 130, 140, and a bottom surface 150, and the light-emitting surface 120 is adjacent to the light-incident surface 110, and the side surfaces 130, 140 are respectively connected to the light-incident surface 110 and the light-emitting surface 120 and the bottom surface 150, and the light-emitting surface 120 is opposite to the bottom surface 150. The light emitting element 20 is disposed opposite to the light incident surface 110 of the board 100 and is suitable for emitting light L and incident on the light incident surface 110. The plurality of first strip-shaped structures 200 are disposed on the light-emitting surface 120. The plurality of first strip-like structures 200 extend from the direction E close to the light-incident surface 110 toward the extension direction E away from the light-incident surface 110, and the first strip-like structures 200 are arranged along the arrangement direction R, wherein the extension direction E is not parallel to the arrangement direction R . In this embodiment, the extension direction E is, for example, perpendicular to the light incident surface 110, and the arrangement direction R is, for example, parallel to the light incident surface 110, that is, the extension direction E is perpendicular to the arrangement direction R, but is not limited thereto. The plurality of second strip-shaped structures 300 are disposed on the light-emitting surface 120. The plurality of second strip-shaped structures 300 extend in the extension direction E, and the second strip-shaped structures 300 are arranged along the arrangement direction R. The numbers of the plurality of first strip structures 200 and the plurality of second strip structures 300 in FIGS. 1 and 2 are only for illustration, and the present creation does not particularly limit the number of the first strip structures 200 and the second strip structures 300 .

There is a gap S between any two adjacent first strip structures 200, and the range of the gap S is, for example, 0.01 μm-10 mm, but it is not limited thereto. The function of making any two adjacent strip structures 200 have a spacing S between them is to increase the probability that the light L will be totally reflected in the plate 100. Relatively speaking, the first strip structures 200 will cause the light to be totally reflected. L exits from the light exit surface 120 of the board body 100. The spacing S is gradually changed along the arrangement direction R from one side of the first strip-shaped structures 200 to the other side. Specifically, the trend of the pitch S along the arrangement direction R from the side 130 to the side 140 of the board 100 is gradual. The following will take FIG. 2 as an example for detailed description. The number of the plurality of first strip-shaped structures 200 in FIG. 2 is 7, so there are spacings S1, S2, S3, S4, S5, S6 between the strip-shaped structures 200. In this embodiment, the spacing S along the arrangement direction R is from one side (the side 130 of the board 100) to the other side (the side 140 of the board 100) of the plurality of first strip-like structures 200 to increase first and then Gradually gradually decrease. This means that the distance between S1 ~ S3 is getting bigger and bigger, and the distance between S4 ~ S6 is getting smaller and smaller. On the whole, in the distances S1 to S6, the distances between the distances S1 and S6 located on both sides are the smallest, and the distance between the distances S3 and S4 located in the middle is the largest.

In addition, preferably, the spacing S along the arrangement direction R from one side (the side 130 of the board 100) to the other side (the side 140 of the board 100) of the plurality of strip structures 200 is, for example, an arithmetic progression. The way is gradual, but not limited to this. Taking this embodiment as an example, if the spacing S1 is 2 mm, the spacing S2 is 4 mm, the spacing S3 is 8 mm, the spacing S4 is 8 mm, the spacing S5 is 4 mm, and the spacing S6 is 2 mm. According to different design requirements, the gradation parameters can be adjusted. This creation does not specifically limit the gradation method.

However, considering that the spacing S is too large, it may cause the light source module 1 to produce uneven light and dark line stripes after the light is emitted to the display screen. Therefore, in the light guide plate 10 of this embodiment, the distance S between any two adjacent first strip structures 200 is, for example, configured with at least one of the second strip structures 300, that is, the second strip structures 300. The number of the strip structures 300 is, for example, the number of these spacings S or more. Since the spacing S is gradually changed along the arrangement direction R from one side (the side 130 of the board 100) to the other side (the side 140 of the board 100) of the plurality of first strip structures 200, in this embodiment, the distance S is The distance is proportional to, for example, the number of the plurality of second strip-like structures 300 arranged therebetween, but is not limited thereto. For example, in FIG. 2, three second strip structures 300 are respectively arranged between the larger spacing S3 and S4, and one second strip structure 300 is respectively arranged between the smaller spacing S1 and S6. In addition, the distance a between any two adjacent plurality of second strip structures 300 is, for example, the same, and the distance a between each of the first strip structures 200 and the plurality of second strip structures 300 is also the same, for example. In this embodiment, the distance between any two adjacent strip structures 300 on the light guide plate 10 is the same, but it is not limited to this. In another embodiment, the spacing a can also be arranged in a gradual manner like the spacing S, and the gradual manner is the same as the spacing S. For example, if the distance S is gradually increased from one side of the plurality of first strip-like structures 200 to the other side along the arrangement direction R, the distance a is gradually increased from any two adjacent ones along the arrangement direction R. One of the first strip-like structures 200 gradually increases and then decreases gradually.

The cross-sectional shapes of the plurality of first strip structures 200 and the plurality of second strip structures 300 in the direction parallel to the arrangement direction R include semicircles (as shown in FIG. 1) and triangles, but are not limited thereto. The present creation does not limit the shape of the first strip structure 200 and the second strip structure 300, as long as the light emission direction can be controlled and the effect of dispersing the light can be achieved. In this embodiment, the plurality of first strip structures 200 and the plurality of second strip structures 300 are, for example, semi-cylindrical.

Regarding the detailed structure of the plurality of first strip-shaped structures 200, specifically, the length Le of the first strip-shaped structure 200 in the extension direction E is greater than 0 and less than 500 mm. The width W1 of the first strip structure 200 in the arrangement direction R is greater than 0 and less than 200 mm. The distance H1 between the apex P1 of the first strip-shaped structure 200 and the light-emitting surface 120, which is the height of the first strip-shaped structure 200, is greater than 0 and less than 200 mm. On the other hand, regarding the detailed structure of the plurality of second strip-shaped structures 300, specifically, the length of the second strip-shaped structure 300 in the extension direction E is, for example, the same as the length Le of the first strip-shaped structure 200, which is greater than 0. And less than 500mm. The width W2 of the second strip structure 300 in the arrangement direction R is greater than 0 and less than 100 mm. The distance H2 between the vertex P2 of the second strip structure 300 and the light-emitting surface 120, which is the height of the second strip structure 300, is greater than 0 and less than 100 mm. It can be seen from the above that, in this embodiment, the width W2 and height (the distance H2 between the vertex P2 and the light-emitting surface 120) of the second strip structure 300 are smaller than the width W1 and height (vertex P1) of the first strip structure 200. The distance H1 from the light-emitting surface 120), specifically, the width W2 and the distance H2 are, for example, 0.01 to 0.5 times the width W1 and the distance H1, respectively. Under this design, part of the light can still be transmitted to the dark zone area by the total reflection generated by the arrangement of the spacing S, while a small amount of light can be emitted from the light guide plate 10 through the second strip structure 300, which reduces the excessively large spacing S. The height difference between the first strip-shaped structure 200 and the light-emitting surface 120 causes uneven light and dark line stripes on the display screen, thereby enhancing the taste of the display screen. In addition, the second strip-shaped structure 300 can also be adjusted to different curvatures, and its light collection characteristics can be used to adjust the light ratio and improve the light uniformity.

In this embodiment, the light-emitting element 20 includes, for example, a light-emitting element 20 having a plurality of point light sources, where the point light sources are, for example, light emitting diodes (LEDs), but not limited to this. The light-emitting element 20 can also be other types of light source components, such as a lamp tube, and this creation does not limit the type of light source. In addition, the number of light-emitting elements 20 in FIG. 1 is only for illustration, and the present invention does not particularly limit the number of light-emitting elements 20.

The light guide plate 10 further includes, for example, a plurality of diffusion microstructures 400 arranged on the bottom surface 150. In this embodiment, the diffusing microstructure 400 may be dots or other microstructures that can diffuse light. In addition, the distribution density of the multiple diffusion microstructures 400 can also be adjusted according to different design requirements or different optical effect requirements, and the present creation is not particularly limited.

The light source module 1 further includes, for example, a reflective sheet 30 disposed under the light guide plate 10 to reflect light L leaking from under the light guide plate 10 back into the light guide plate 10 to improve light utilization efficiency.

In this embodiment, the side of the light-emitting surface 120 adjacent to the light-incident surface 110 has, for example, a spacing area 121, but it is not limited to this. The spacer region 121 does not have a plurality of first strip structures 200 and a plurality of second strip structures 300 and is a flat surface. Specifically, the distance of the spacer area 121 from the side adjacent to the light incident surface 110 to the side adjacent to the plurality of first strip structures 200 and the plurality of second strip structures 300 is greater than 0 and less than 100 mm, that is, the interval The width of the area 121 is W3. Since the plurality of light-emitting elements 20 are arranged at intervals beside the light guide plate 10, the emitted light L enters the light guide plate 10 to generate a plurality of bright areas corresponding to the plurality of light-emitting elements 20 and a dark area between the two light-emitting elements 20 , Forming a hot spot phenomenon with uneven brightness. By setting the spacing area 121, when the light L enters the light guide plate 10, the light L can be effectively mixed without being affected by the structure, thereby improving the hot spot phenomenon of uneven brightness. In addition, the provision of the spacer area 121 can also reduce the possibility of damage to the plurality of first strip structures 200 and the plurality of second strip structures 300 when processing the edges of the plate body 100. Therefore, not only is the light-emitting surface 120 adjacent to the light-incident surface 110, but according to different design requirements, the spacing area 121 can also be arranged on the side of the light-emitting surface 120 away from the light-incident surface 110, or the light-emitting surface 120 is adjacent to the two side surfaces 130 respectively. , 140 side, as shown in Figure 1.

In the light source module 1 of this embodiment, by adjusting the arrangement method of the plurality of first strip structures 200 on the light guide plate 10, the spacing S between any two adjacent first strip structures 200 is arranged along the line The direction R shows a gradual trend. The light L incident from the middle has a higher probability of being totally reflected on the area corresponding to the spacing S when it is transmitted to the light-emitting surface 120, and then transmitted to the dark zone areas on both sides. The distance S between the first strip structures 200 is small, and the multiple first strip structures 200 are arranged more concentrated, so the light L is easily emitted from both sides of the light guide plate 10, thereby improving the brightness and light in the dark zone area. The effect of uniformity. In the case where the light emitting element 20 has different light output intensities corresponding to the light incident surface 110, it can also be adjusted to appropriate gradual parameters. Under this structure, while improving the brightness and light uniformity of the dark zone area, the brightness of the bright zone area can be maintained without significant reduction. On the other hand, since the distance S between any two adjacent first strip structures 200 is configured with at least one of the second strip structures 300, it can reduce the first stripe structure due to the excessively large distance S. The height difference between the shape structure 200 and the light-emitting surface 120 causes uneven light and dark line stripes on the display screen, thereby enhancing the taste of the display screen.

3A to 3E are schematic diagrams of the first strip structure of other embodiments of the creation. Please refer to FIGS. 1 and 3A to 3E. As described above, the cross-sectional shapes of the plurality of first strip structures 200 in the direction parallel to the arrangement direction R include semicircles (as shown in FIG. 1) and triangles (such as Figure 3A). On the other hand, the first strip-shaped structure 200 is, for example, a structure protruding outside the pillars of the light-emitting surface 120, or may be a structure recessed on the light-emitting surface 120, as shown in FIGS. 3B and 3C. In the recessed embodiment, the length Le and the width W1 of the first strip structure 200 are defined as described above, and the height of the first strip structure 200 is the distance from the lowest point of the bottom to the light emitting surface 120, which is also greater than 0 and less than 200mm. Although the first strip structure 200 is taken as an example in FIGS. 3A to 3C, the style of the embodiment is also applicable to the second strip structure 300. The present creation also does not limit the first strip structure 200 and the second strip structure 300 to use the same style of structure.

In addition, in the embodiment of FIG. 1, the distance H1 between the vertex P1 of the first strip structure 200 and the light exit surface 120 is from the end of the first strip structure 200 close to the light incident surface 110 to the end far away from the light incident surface 110. The distance H2 between the vertex P2 of the second strip-shaped structure 300 and the light-emitting surface 120 remains unchanged from the end of the second strip-shaped structure 300 close to the light-incident surface 110 to the end far away from the light-incident surface 110. But not limited to this. In other embodiments, the distance H1 may also be gradually increased and then decreased gradually from the end of the first strip structure 200 close to the light incident surface 110 to the end away from the light incident surface 110 (as shown in FIG. 3D) The distance H2 can also be gradually increased and then decreased gradually from the end of the second strip structure 300 close to the light incident surface 110 to the end far away from the light incident surface 110 (not shown); or the distance H1 is from The end of the first strip-shaped structure 200 close to the light-incident surface 110 gradually decreases and then gradually increases toward the end away from the light-incident surface 110 (as shown in FIG. 3E), and the distance H2 is closer to the entrance from the second strip-shaped structure 300 The end of the glossy surface 110 is gradually reduced and then gradually increased toward the end away from the light incident surface 110 (not shown in the figure). In addition, during the gradual change of the distance H1, if it is gradually increasing, the width W1 of the first strip structure 200 will also increase as the distance H1 gradually increases. If it is gradually decreasing, the first strip structure 200 The width W1 will also decrease as the distance H1 decreases. Similarly, in the process of gradual change in the distance H2, if it is gradually increasing, the width W2 of the second strip structure 300 will also increase with the distance H2. If it is gradually decreasing, the second strip structure The width W2 of 300 will also decrease as the distance H2 decreases.

4A to 4C are schematic cross-sectional views of light guide plates according to other embodiments of the creation. Please refer to FIGS. 1 and 4A to 4C. In this embodiment, the spacing S is from one side of the plurality of first strip structures 200 (the side 130 of the board 100) to the other side (the board) along the arrangement direction R. The side of 100 (140) gradually increases and then decreases gradually, but it is not limited to this. In the case where the light emitting element 20 has different light output intensities corresponding to different positions of the light incident surface 110, the gradual change mode can be adjusted. For example, when the light output intensity on both sides of the light emitting element 20 in FIG. 1 is greater than the light output intensity in the middle, as shown in FIG. The side 130 of the board 100) to the other side (the side 140 of the board 100) are gradually reduced and then gradually increased, so that the light L incident from both sides has a higher probability of being transmitted to the light-emitting surface 120. The total reflection is generated on the area corresponding to the distance S, and then transmitted to the dark zone area in the middle. When the light intensity on the right side of the light emitting element 20 in FIG. 1 is greater than the light intensity on the left side, as shown in FIG. ) To the other side (the side surface 140 of the plate 100) in a gradually increasing manner, so that the light L incident from the right side has a higher probability of being transmitted to the light exit surface 120 to produce total reflection on the area corresponding to the spacing S, And then pass to the dark band area on the left. Similarly, when the light intensity on the left side of the light emitting element 20 in FIG. 1 is greater than the light intensity on the right side, as shown in FIG. The side 130 of the plate body 100) to the other side (the side 140 of the plate 100) gradually changes in a gradual manner, so that the light L incident from the left has a higher probability of being transmitted to the light-emitting surface 120 in the area corresponding to the spacing S. Reflect, and then pass to the dark band area on the right. In the foregoing FIGS. 4A to 4C, the number of the plurality of first strip structures 200 and the plurality of second strip structures 300 is only an example of the arrangement, and is not limited to the plurality of first strip structures 200 and the plurality of second strip structures. The number of strip structures 300.

To sum up, in the light source module of this embodiment, by adjusting the arrangement method of the multiple strip structures on the light guide plate, the spacing between any two adjacent multiple strip structures shows a gradual trend in the arrangement direction. , The light incident from the middle has a higher probability of being totally reflected on the area corresponding to the distance when it is transmitted to the light-emitting surface, and then transmitted to the dark zone area on both sides, due to the small distance on both sides and multiple strip structures The arrangement is relatively concentrated, so the light is easily emitted from both sides of the light guide plate, thereby achieving the effect of improving the brightness and light uniformity of the dark zone area. In the case that the light-emitting element has different light-emitting intensity corresponding to the light-incident surface, it can also be adjusted to a suitable gradual parameter. In addition, under the design structure of the light guide plate of this creative embodiment, while improving the brightness and light uniformity of the dark zone area, the brightness of the bright zone area can be maintained without significant reduction. On the other hand, because the distance between any two adjacent first strip structures is configured with at least one of the second strip structures, it can reduce the distance between the first strip structure and the light emitting The height difference between the surfaces causes uneven light and dark line stripes on the display screen, thereby enhancing the taste of the display screen. Since the light source module of this creative embodiment uses the above-mentioned light guide plate, it also has the effect of improving the brightness and light uniformity without affecting the taste of the display screen.

However, the above are only the preferred embodiments of this creation, and should not be used to limit the scope of implementation of this creation, that is, simple equivalent changes and modifications made according to the scope of patent application and new description of this creation, All are still within the scope of this creation patent. In addition, any embodiment of the creation or the scope of the patent application does not have to achieve all the purposes or advantages or features disclosed in the creation. In addition, the abstract part and title are only used to assist the search of patent documents, not to limit the scope of rights of this creation. In addition, the terms "first" and "second" mentioned in this specification or the scope of the patent application are only used to name the element (element) or to distinguish different embodiments or ranges, and are not used to limit the number of elements. Upper or lower limit.

1: Light source module 10: Light guide plate 20: Light-emitting element 30: reflective sheet 100: Board body 110: Glossy surface 120: Glossy Surface 121: Interval area 130, 140: side 150: Bottom 200: The first strip structure 300: second strip structure 400: Diffusion microstructure A-A’: Cut line a, S, S1, S2, S3, S4, S5, S6: spacing E: Extension direction H1, H2: distance L: light Le: length P1, P2: vertices R: Arrangement direction W1, W2, W3: width

FIG. 1 is a three-dimensional schematic diagram of a light source module according to an embodiment of the creation. Fig. 2 is a schematic cross-sectional view taken along the line A-A' of Fig. 1. 3A to 3E are schematic diagrams of the first strip structure of other embodiments of the creation. 4A to 4C are schematic cross-sectional views of light guide plates according to other embodiments of the creation.

1: Light source module

10: Light guide plate

20: Light-emitting element

30: reflective sheet

100: Board body

110: Glossy surface

120: Glossy Surface

121: Interval area

130, 140: side

150: Bottom

200: The first strip structure

300: second strip structure

A-A’: Cut line

a, S: Spacing

E: Extension direction

L: light

Le: length

R: Arrangement direction

W1, W2, W3: width

Claims (19)

A light guide plate, including: A board having a light-incident surface and a light-emitting surface, the light-emitting surface is adjacent to the light-incident surface; A plurality of first strip-shaped structures are arranged on the light-emitting surface, the first strip-shaped structures extend from close to the light-incident surface toward an extension direction away from the light-incident surface, and the first strip-shaped structures are arranged along a line The extending direction is not parallel to the arrangement direction, and there is a distance between any two adjacent first strip-like structures, and the distance is from one side of the first strip-like structures to the other along the arrangement direction. Gradient on one side; and A plurality of second strip-shaped structures are arranged on the light-emitting surface, the second strip-shaped structures extend toward the extending direction, and the second strip-shaped structures are arranged along the arrangement direction, wherein any two adjacent first At least one of the second strip structures is arranged at the distance between the strip structures. The light guide plate according to claim 1, wherein the distance between any two adjacent second strip structures is the same. The light guide plate according to claim 2, wherein the distance between each of the first strip structures and the second strip structure adjacent to the second strip structure is the same as that of any two adjacent strip structures The distance between the second strip-shaped structures. The light guide plate according to claim 1, wherein the distance between any two adjacent second strip structures gradually changes from one of any two adjacent first strip structures along the arrangement direction . The light guide plate according to claim 1, wherein the distance of the pitch is proportional to the number of the second strip-shaped structures arranged therebetween. The light guide plate according to claim 1, wherein the pitch is gradually changed in an arithmetic progression from one side of the first strip-shaped structures to the other side along the arrangement direction. The light guide plate according to claim 1, wherein the pitch gradually increases and then gradually decreases along the arrangement direction from one side of the first strip-shaped structures to the other side. The light guide plate according to claim 1, wherein the pitch gradually decreases and then gradually increases from one side of the first strip-shaped structures along the arrangement direction. The light guide plate according to claim 1, wherein the pitch is gradually increased from one side of the first strip-shaped structures to the other side along the arrangement direction. The light guide plate according to claim 1, wherein the pitch is gradually reduced from one side of the first strip-shaped structures to the other side along the arrangement direction. The light guide plate according to claim 1, wherein the pitch ranges from 0.01 μm to 10 mm. The light guide plate according to claim 1, wherein a length of the first strip-shaped structures in the extending direction is greater than 0 and less than 500 mm, and a length of the second strip-shaped structures in the extending direction is greater than 0 and less than 500mm. The light guide plate according to claim 1, wherein the distance between a vertex of the first strip-shaped structures and the light-emitting surface is greater than 0 and less than 200mm, and a vertex of the second strip-shaped structures and the light-emitting surface The distance between them is greater than 0 and less than 100 mm. The light guide plate according to claim 1, wherein a width of the first strip-like structures in the arrangement direction is greater than 0 and less than 200 mm, and a width of the second strip-like structures in the arrangement direction is greater than 0 and less than 100mm. The light guide plate according to claim 1, wherein the cross-sectional shapes of the first strip-shaped structures and the second strip-shaped structures in a direction parallel to the arrangement direction include a semicircle and a triangle. The light guide plate according to claim 1, wherein the distance between a vertex of the first strip-shaped structures and the light-emitting surface is from an end of the first strip-shaped structures close to the light-incident surface toward away from the light-incident surface One end of the second strip structure gradually increases and then gradually decreases. The distance between a vertex of the second strip-shaped structures and the light-emitting surface moves from the end of the second strip-shaped structures close to the light-incident surface toward away from the light-incident surface. One end of the glossy surface gradually increases and then gradually decreases. The light guide plate according to claim 1, wherein the distance between a vertex of the first strip-shaped structures and the light-emitting surface is from an end of the first strip-shaped structures close to the light-incident surface toward away from the light-incident surface One end of the second strip structure gradually decreases and then gradually increases. The distance between a vertex of the second strip structure and the light exit surface moves from the end of the second strip structure close to the light entrance surface toward the end far away from the entrance surface. One end of the glossy surface gradually decreases and then gradually increases. The light guide plate according to claim 1, wherein a side of the light-emitting surface adjacent to the light-incident surface has a spacer region, and the spacer region does not have the first strip-shaped structures and the second strip-shaped structures and is a A flat surface, and the distance from the side adjacent to the light incident surface to the side adjacent to the first strip-shaped structures and the second strip-shaped structures of the spacing area is greater than 0 and less than 100 mm. A light source module includes: A light guide plate, including: A board with a light-incident surface and a light-emitting surface, the light-emitting surface is adjacent to the light-incident surface; A plurality of first strip-shaped structures are arranged on the light-emitting surface, the first strip-shaped structures extend from close to the light-incident surface toward an extension direction away from the light-incident surface, and the first strip-shaped structures are arranged along a line The extending direction is not parallel to the arrangement direction, and there is a distance between any two adjacent first strip structures, and the distance is from one side of the first strip structures to the other along the arrangement direction. Gradient on one side; and A plurality of second strip-shaped structures are arranged on the light-emitting surface, the second strip-shaped structures extend toward the extension direction, and the second strip-shaped structures are arranged along the arrangement direction, wherein any two adjacent first At least one of the second strip-shaped structures is arranged at the distance between the strip-shaped structures; and A light-emitting element is arranged opposite to the light-incident surface of the board.

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