CN113866864A

CN113866864A - Light guide plate and display device

Info

Publication number: CN113866864A
Application number: CN202111209110.5A
Authority: CN
Inventors: 刘志波; 杨越峰
Original assignee: Nano Precision Suzhou Co Ltd
Current assignee: Nano Precision Suzhou Co Ltd
Priority date: 2021-10-18
Filing date: 2021-10-18
Publication date: 2021-12-31
Anticipated expiration: 2041-10-18
Also published as: CN113866864B

Abstract

A light guide plate is provided with a light incident surface, a first side surface and a second side surface which are opposite to each other, and a light emitting surface and a bottom surface which are opposite to each other. The light incident surface is adjacent to the first side surface, the second side surface, the light emergent surface and the bottom surface. The bottom surface is provided with a plurality of screen dots and a plurality of reference dot rows. The reference point columns extend in the column direction and are arranged in the row direction. Each reference point column includes a plurality of reference points. These reference points are arranged in a straight line in the column direction. Each dot is randomly distributed on each corresponding reference point along the direction vertical to the light incident surface, one side of each reference point close to the light incident surface or one side of each reference point far away from the light incident surface. The orthographic projection of each mesh point on the light incident surface along the direction vertical to the light incident surface is overlapped with the orthographic projection of each corresponding reference point on the light incident surface along the direction vertical to the light incident surface. The invention also provides a display device using the light guide plate. The light guide plate and the display device provided by the invention have the effects of improving the interference fringe phenomenon on a display picture and improving the quality of the display picture.

Description

Light guide plate and display device

Technical Field

The present invention relates to a light guide plate and a display device, and more particularly, to a light guide plate for a display device and a display device using the same.

Background

In general, 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, the backlight module is required to provide an illumination light source to the liquid crystal display panel.

In the existing lateral backlight module, microstructures such as mesh points are disposed on the light guide plate to change the path of light, and when the incident angle of the light is smaller than the total reflection angle, the light can be refracted out of the light guide plate. In addition, the shape of the microstructures of the light guide plate also affects the deflection direction and the angular distribution of light.

However, when the dots are regularly arranged on the light guide plate, each light transmitted to each dot is refracted out of the light guide plate at the same angle, and interference fringes are easily generated on the display screen, thereby affecting the quality of the display screen.

The background section is only provided to aid in understanding the present disclosure, and therefore the disclosure in the background section may include some prior art that does not constitute a part of the knowledge of those skilled in the art. Furthermore, the disclosure in the "background" does not represent a material or problem to be solved by one or more embodiments of the present invention, nor is it a representation that has been known or appreciated by those skilled in the art prior to the filing of the present application.

Disclosure of Invention

The invention provides a light guide plate capable of improving interference fringe phenomenon.

The invention provides a display device, which can improve the interference fringe phenomenon on a display picture and further improve the quality of the display picture.

Other objects and advantages of the present invention will be further understood from the technical features disclosed in the present invention.

In order to achieve one or a part of or all of the above or other objects, an embodiment of the invention provides a light guide plate having a light incident surface, a first side surface and a second side surface opposite to each other, and a light emitting surface and a bottom surface opposite to each other. The light incident surface is adjacent to the first side surface, the second side surface, the light emergent surface and the bottom surface. The first side surface and the second side surface are respectively adjacent to the light-emitting surface and the bottom surface. The bottom surface is provided with a plurality of screen dots and a plurality of reference dot columns. The reference point columns extend in the column direction and are arranged in the row direction. The row direction is a direction from the light incident surface toward a direction away from the light incident surface. The column direction is a direction from the first side toward the second side. Each reference point column includes a plurality of reference points. These reference points are arranged linearly along the column direction. The intervals between adjacent reference point columns are the same or decrease in the row direction. The plurality of mesh points respectively correspond to a plurality of reference points of the plurality of reference point rows, each mesh point is randomly distributed on each corresponding reference point along the direction vertical to the light incident surface, one side of each reference point close to the light incident surface or one side of each reference point far away from the light incident surface, and the orthographic projection of each mesh point on the light incident surface along the direction vertical to the light incident surface is overlapped with the orthographic projection of each corresponding reference point on the light incident surface along the direction vertical to the light incident surface. At least one part of the plurality of screen dots are positioned on the corresponding plurality of reference points, and at least another part of the plurality of screen dots are positioned on one side, close to the light incident surface, of the corresponding plurality of reference points.

In order to achieve one or a part of or all of the above or other objects, a display device according to an embodiment of the invention includes a light source module and a display panel. The light source module comprises a light emitting element and the light guide plate. The light emitting element is arranged beside the light incident surface. The display panel is configured on the light emitting side of the light source module.

In the display device of the embodiment of the invention, the light guide plate of the light source module has a first side surface and a second side surface which are opposite to each other, and a light emitting surface and a bottom surface which are opposite to each other, and the first side surface and the second side surface are respectively adjacent to the light emitting surface and the bottom surface. The bottom surface is provided with a plurality of screen dots and a plurality of reference point columns, each reference point column comprises a plurality of reference points, the reference points are linearly arranged along the column direction from the first side surface to the second side surface, and the screen dots respectively correspond to the reference points of the reference point columns. Each mesh point is randomly distributed on each corresponding reference point along the row direction from the light incident surface to the far side from the light incident surface, one side of each reference point close to the light incident surface or one side of each reference point far from the light incident surface. In other words, the dots of the light guide plate are not regularly arranged on the bottom surface compared to the reference points, but may be slightly shifted from the positions of the regularly arranged reference points, i.e., arranged on the bottom surface in an approximately regular arrangement. Under the configuration, the dots of the light guide plate are not likely to be gathered due to the completely random configuration, and abnormal bright spots are generated on the display screen. Meanwhile, the dots can not generate interference fringes due to regular arrangement. Therefore, the light guide plate configured by the mesh points can improve the interference fringe phenomenon on the display picture, and further improve the quality of the display picture.

In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

Fig. 1 is a schematic perspective view of a display device according to an embodiment of the invention.

Fig. 2A is a partial schematic view of a bottom surface of a light guide plate according to an embodiment of the invention.

Fig. 2B to 2D are partial schematic views of a bottom surface of a light guide plate according to another embodiment of the invention.

FIG. 3A is a schematic cross-sectional view taken along line AA' of FIG. 1.

Fig. 3B is a schematic cross-sectional view taken along line BB' of fig. 1.

Fig. 4 is a partial schematic view of a bottom surface of a light guide plate according to another embodiment of the invention.

List of reference numerals

1 display device

10 light source module

20 display panel

21 pixel unit

22 black matrix layer

100. 100a light guide plate

110 incident light surface

120 first side surface

130 second side surface

140 light-emitting surface

150. 150a bottom surface

151. 151a mesh point

152 column of reference points

153 reference point

154 first region

155 second region

200 light emitting element

Cutting line AA', BB

C in the column direction

CP pixel pitch

D. D1, D2 distance

DD dot pitch

DP predetermined pitch

M is the middle line

R is the row direction

S is interval

L is light.

Detailed Description

The foregoing and other technical and scientific aspects, features and utilities of the present invention will be apparent from the following detailed description of a preferred embodiment when read in conjunction with the accompanying drawings. Directional terms as referred to in the following examples, for example: up, down, left, right, front or rear, etc., are simply directions with reference to the drawings. Accordingly, the directional terminology is used for purposes of illustration and is in no way limiting.

Fig. 1 is a schematic perspective view of a display device according to an embodiment of the invention. Fig. 2A is a partial schematic view of a bottom surface of a light guide plate according to an embodiment of the invention. Fig. 2B to 2D are partial schematic views of a bottom surface of a light guide plate according to another embodiment of the invention. Referring to fig. 1 and fig. 2A, a display device 1 of the present embodiment includes a light source module 10 and a display panel 20. The display panel 20 is disposed on the light emitting side of the light source module 10. The light source module 10 includes a light guide plate 100 and a light emitting device 200. The light guide plate 100 of the present embodiment has a light incident surface 110, a first side surface 120 and a second side surface 130 opposite to each other, and a light emitting surface 140 and a bottom surface 150 opposite to each other, and the light guide plate 100 is, for example, a rectangular parallelepiped. Specifically, the light incident surface 110 is adjacent to the first side surface 120, the second side surface 130, the light emitting surface 140 and the bottom surface 150. The first side surface 120 and the second side surface 130 are respectively adjacent to the light emitting surface 140 and the bottom surface 150. The bottom surface 150 has a plurality of dots 151. The light emitting element 200 is disposed beside the light incident surface 110 and is configured to emit a light beam L to the light incident surface 110.

The display panel 20 may be a liquid crystal display panel or other non-self-luminous display panel, the liquid crystal display panel may be a transmissive display panel or a transflective display panel, and the light source module 10 is used to provide a surface light source to the display panel 20.

The light emitting element 200 is, for example, a Light Emitting Diode (LED), but is not limited thereto. The light emitting elements 200 may also be other types of light source assemblies, such as a lamp tube, and the invention is not limited to the type of light source. In the present embodiment, three light emitting elements 200 are taken as an example, but the number of the plurality of light emitting elements 200 is not particularly limited. Hereinafter, the arrangement of the dots 151 of the bottom surface 150 of the present embodiment will be described in detail with reference to fig. 2A to 2D.

Please refer to fig. 1, fig. 2A to fig. 2D. The bottom surface 150 has a plurality of reference point columns 152 in addition to the plurality of dots 151, and each reference point column 152 includes a plurality of reference points 153. The size of the dots 151 is, for example, the same as the size of the reference points 153, but is not limited thereto. The

reference point rows

152 and 153 in fig. 2A are drawn by dotted lines and dotted lines to represent the

reference points

153 and 152 that are not really present on the light guide plate 100, and the reference points 153 are used as reference points for explaining the arrangement of the dots 151. That is, the bottom surface 150 is a flat surface without other microstructures except the dots 151, so that the light L is totally reflected. In the present embodiment, the reference point columns 152 are, for example, evenly distributed on the entire surface of the bottom surface 150, and the reference point columns 152 extend in the column direction C and are arranged along the row direction R. The column direction C is a direction from the first side surface 120 to the second side surface 130 (e.g., a direction perpendicular to the first side surface 120), and the row direction R is a direction from the light incident surface 110 to a direction away from the light incident surface 110. Specifically, the row direction R refers to a direction in which one reference point 153 is connected to the nearest reference point 153 in another reference point column 152 in any two adjacent reference point columns 152. A plurality of reference points 153 are arranged in a line along the column direction C to form a so-called "reference point column 152". Moreover, the intervals S between adjacent reference point rows 152 are the same or decrease progressively along the row direction R, the same interval S is taken as an example in fig. 2A, and the interval S is taken as an example in another embodiment of fig. 2B, and decreases progressively along the row direction R from the light incident surface 110.

In addition, in the present embodiment, the column direction C is, for example, parallel to the light incident surface 110, the row direction R is, for example, perpendicular to the light incident surface 110, that is, the plurality of reference points 153 are, for example, arranged in a matrix, and the plurality of reference point rows 152 are arranged in a one-dimensional array, but the present invention is not limited thereto. That is, in the row direction R (the direction perpendicular to the column direction C), the projections of the reference point 153 of any two adjacent reference point rows 152 and the closest reference point 153 of another reference point row 152 on the light incident surface 110 overlap each other. More specifically, among the plurality of reference points 153 distributed on the bottom surface 150, a quadrilateral shape formed by connecting any four adjacent reference points 153 (the four most adjacent reference points 153) is a rectangle. In another embodiment shown in fig. 2C, the column direction C is parallel to the light incident surface 110, and the included angle between the column direction C and the row direction R is between 30 degrees and 90 degrees (excluding 90 degrees), preferably between 30 degrees and 70 degrees. That is, in the row direction R, a projection of one reference point 153 in any two adjacent reference point rows 152 and a projection of the closest reference point 153 in another reference point row 152 on the light incident surface 110 overlap. In other words, in a direction perpendicular to the column direction C (i.e., in a direction parallel to the normal of the light incident surface 110), the orthogonal projections of one reference point 153 of any two adjacent reference point rows 152 and the closest reference point 153 of the other reference point row 152 on the light incident surface 110 do not overlap. More specifically, among the plurality of reference points 153 distributed on the bottom surface 150, a quadrilateral shape formed by connecting any four adjacent reference points 153 (the four most adjacent reference points 153) is a parallelogram or a rhombus. This may further increase the uniformity of the distribution of the plurality of reference points 153 across the bottom surface 150.

In another embodiment of FIG. 2D, the predetermined spacing DP between any two adjacent reference points 153 in the reference point column 152 decreases from the light incident surface 110 in a direction away from the light incident surface 110. Specifically, as shown in fig. 2D, the farther the reference point row 152 from the light incident surface 110, the more the number of the reference points 153 and the corresponding dots 151 are increased. Therefore, the specific feature of the embodiment shown in fig. 2D is that the number of the dots 151 increases from the light incident surface 110 to the direction away from the light incident surface 110, because the intensity of the light L near the light incident surface 110 is higher, and the light L does not need to be diffused by too many dots 151; the intensity of the light L far from the light incident surface 110 is lower, and the light L is diffused by more dots 151, so that the brightness uniformity of the light guide plate 100 is increased. Specifically, in the embodiment, since the number of the dots 151 gradually increases from the light incident surface 110 to the direction away from the light incident surface 110, the row direction R is not a fixed value, but the row direction R can be defined as the direction connecting one reference point 153 of any two adjacent reference point rows 152 with the nearest reference point 153 of the other reference point row 152, or the row direction R can not be particularly defined, so the included angle between the column direction C and the row direction R is not a fixed value and is not limited by the angle range condition.

The different embodiments shown in fig. 2A to 2D are only exemplary, and the structure of the light guide plate 100 of the present invention is not limited to the above-mentioned embodiments. And features of different embodiments may be combined with each other where appropriate to enhance performance or meet different design requirements.

In the embodiments of fig. 2A, 2B, 2C or 2D, although the reference point rows and the reference points have different variations in arrangement, they still have a certain regularity, and thus the reference point rows and the reference points all belong to a "regular arrangement". On the other hand, the plurality of dots 151 respectively correspond to the plurality of reference points 153 of the plurality of reference point columns 152, i.e., a single dot 151 corresponds to a single reference point 153. Each dot 151 is randomly distributed on each corresponding reference point 153 along a direction perpendicular to the light incident surface 110, a side of each reference point 153 close to the light incident surface 110, or a side of each reference point 153 far from the light incident surface 110. Wherein, what is called distribution on each corresponding reference point 153 includes that the dot 151 completely overlaps the reference point 153, and the dot 151 partially overlaps the reference point 153. In the embodiment of fig. 2A, the direction perpendicular to the light incident surface 110 is the row direction R, however, in the embodiment of fig. 2C, the direction perpendicular to the light incident surface 110 is not the same as the row direction R, and the arrangement rule of the dots 151 still refers to the direction perpendicular to the light incident surface 110. Specifically, in the embodiments of fig. 2A, 2B, or 2D, the orthographic projection of each dot 151 on the light incident surface 110 and the orthographic projection of each corresponding reference point 153 on the light incident surface 110 are overlapped. In addition, at least a portion of the dots 151 are located on the corresponding reference points 153, at least another portion of the dots 151 are located on a side of the corresponding reference points 153 close to the light incident surface 110, and at least another portion of the dots 151 are located on a side of the corresponding reference points 153 away from the light incident surface 110. Under the above rules, it can be excluded that the dots 151 are randomly distributed, wherein the dots 151 are all located on the corresponding reference points 153, the dots 151 are all located on the side of the corresponding reference points 153 close to the light incident surface 110, or the dots 151 are all located on the side of the corresponding reference points 153 away from the light incident surface 110.

In the present embodiment, the interval S between any two adjacent reference point columns 152 is greater than the predetermined pitch DP between any two adjacent reference points 153 in each reference point column 152. Although the dots 151 are randomly distributed on the reference point 153 or on a side of the reference point 153 close to the light incident surface 110 or a side far from the light incident surface 110, so that the dot pitch DD between any two adjacent dots 151 in the column direction C is different, the spacing S is larger than the dot pitch DD.

Specifically, the shortest straight-line distance D between each dot 151 and each corresponding reference point 153 is 0-30% of the interval S between any two adjacent reference point rows 152, that is, each dot 151 is randomly distributed in a predetermined range of-30% of the interval S along the direction perpendicular to the light incident surface 110. In the embodiments shown in fig. 2A, fig. 2B, fig. 2C, or fig. 2D, the distribution of the dots 151 in the direction perpendicular to the light incident surface 110 is not too random, which may result in a dot aggregation region, and further generate a bright spot on the display screen, which affects the brightness uniformity of the display screen. For example, in the embodiment of fig. 2B, the spacing S decreases from the light incident surface 110 along the row direction R, so that the spacing S away from the light incident surface 110 is smaller, and the predetermined range of 0-30% of the spacing S is also smaller, so that even if the dot density of the area away from the light incident surface 110 is higher, the bright spots caused by the dot over-aggregation can be avoided.

At a microscopic level, the arrangement of dots 151 is subject to a limited "irregular arrangement" as compared to the "regular arrangement" of reference points 153. However, in a macroscopic view, for example, with respect to the bottom surface 150 of the entire light guide plate 100, since the arrangement of the dots 151 is limited by the dot pitch DD and the distance D being smaller than the interval S, the dots 151 can be regarded as an approximately "regular arrangement".

Referring to fig. 1 and fig. 2A, in the display device 1 of the present embodiment, the light guide plate 100 of the light source module 10 has a first side surface 120 and a second side surface 130 opposite to each other, and a light emitting surface 140 and a bottom surface 150 opposite to each other, and the first side surface 120 and the second side surface 130 are respectively adjacent to the light emitting surface 140 and the bottom surface 150. The bottom surface 150 has a plurality of dots 151 and a plurality of reference dot rows 152, each reference dot row 152 includes a plurality of reference points 153, the reference points 153 are arranged in a straight line along a row direction C from the first side surface 120 to the second side surface 130, and the dots 151 respectively correspond to the reference points 153 of the reference dot rows 152. Each dot 151 is randomly distributed on each corresponding reference point 153, on a side of each reference point 153 close to the light incident surface 110, or on a side of each reference point 153 far from the light incident surface 110 along the row direction R from the light incident surface 110 to the far away from the light incident surface 110. In other words, the dots 151 of the light guide plate 100 are not completely regularly arranged on the bottom surface 150 compared to the reference points 153, but may be slightly shifted from the positions of the regularly arranged reference points 153, i.e., arranged on the bottom surface 150 in a nearly regular arrangement. Under this configuration, the dots 151 of the light guide plate 100 are not likely to be clustered due to the completely random arrangement, and thus generate abnormal bright spots on the display screen. Meanwhile, the dots 151 will not generate interference fringes due to regular arrangement. Therefore, the light guide plate 100 configured with the mesh points can improve the interference pattern phenomenon on the display image, thereby improving the quality of the display image.

In addition to the above-mentioned arrangement of the dots 151, the display device 1 of the present embodiment can further improve the interference fringe phenomenon on the display screen through other arrangements, which will be described in detail below. FIG. 3A is a schematic cross-sectional view taken along line AA' of FIG. 1. Fig. 3B is a schematic cross-sectional view taken along line BB' of fig. 1. Referring to fig. 1, fig. 2A, fig. 3A and fig. 3B, the display panel 20 of the present embodiment includes a plurality of pixel units 21 arranged in an array and a black matrix layer 22. The pixel units 21 are arranged in a matrix, for example, and the black matrix layer 22 is disposed around the pixel units 21. It can also be said that the black matrix layer 22 is in a mesh shape and has a plurality of openings, and the plurality of pixel units 21 are respectively disposed in the openings, which is only illustrated by the cross section of the display panel 20 in fig. 3. In the display panel 20, the shortest distance from the center of each pixel unit 21 to the center of another adjacent pixel unit 21 is the pixel pitch CP. That is, the pixel pitch CP refers to a distance between centers of two adjacent pixel units 21 in the column direction C or the row direction R, not a distance between centers of two adjacent pixel units 21 in the diagonal direction in the matrix arrangement. Specifically, the predetermined pitch DP between any two adjacent reference points 153 in each reference point column 152 is adjusted to be less than twice the pixel pitch CP, and/or the interval S between any two adjacent reference point columns 152 is adjusted to be more than twice the pixel pitch CP but less than three times the pixel pitch CP. Under the design, because the distance between the dots 151 is not too large, after the light L is incident on each dot 151 and diffused, the whole light L can be fully mixed to improve the interference fringe phenomenon on the display picture.

It should be noted that, in fig. 3A and 3B, the interval S between the reference point rows 152 and the predetermined interval DP between the reference points 153 are used for illustration, and the dot interval DD between the dots 151 of any two adjacent dots 151 is not used because the interval S and the predetermined interval DP are both fixed values, and the dot interval DD is different values due to different positions of the two dots, so for convenience of illustration, the interval S and the predetermined interval DP are used as a proportional comparison reference with the pixel interval CP. In the present embodiment, since the distribution of each dot 151 corresponds to each reference point 153, the dot pitch DD should be larger as the predetermined pitch DP is larger; conversely, when the predetermined pitch DP is smaller, the dot pitch DD should also be smaller. Compared with the pixel pitch CP, the predetermined pitch DP and the dot pitch DD are substantially the same, and thus the effect of the actual layout is not affected. Specifically, the dot pitch DD is also smaller than twice the pixel pitch CP. In addition, the light rays illustrated by the light mixing in fig. 3A and 3B are also shown by dotted lines because the light rays L should be incident on the dots 151 and then spread out, rather than being incident on the reference point 153.

Fig. 4 is a partial schematic view of a bottom surface of a light guide plate according to another embodiment of the invention. Referring to fig. 4, the light guide plate 100a of the present embodiment has a similar structure and advantages to the light guide plate 100 described above, and only the major differences of the structure will be described below. In the light guide plate 100a of the present embodiment, the bottom surface 150a includes a first region 154 and a second region 155, the first region 154 is close to the light incident surface 110, and the second region 155 is far from the light incident surface 110. In the present embodiment, the first region 154 and the second region 155 are divided by a middle line M of the bottom surface 150 in the row direction R, that is, the first region 154 and the second region 155 are disposed on both sides of the middle line M. The first region 154 has a maximum extent from the middle line M to the light incident surface 110, and the second region 155 has a maximum extent from the middle line M to the other side away from the light incident surface 110. In other words, the first region 154 does not extend beyond the middle line M to the other side away from the light incident surface 110, the second region 155 does not extend beyond the middle line M to the side close to the light incident surface 110, and the first region 154 and the second region 155 are not simultaneously disposed on the same side of the middle line M.

The reference dot rows 152 and the dots 151a are disposed in the first region 154 and the second region 155. The arrangement of the reference points 153 and the dots 151a is the same as that of the light guide plate 100, and will not be described again. The shortest distance D1 between each dot 151a of the first region 154 and each corresponding reference point 153 is between the first range of values. The shortest distance D2 between each dot 151a of second region 155 and each corresponding reference point 153 is between the second range of values, and the first range of values is greater than the second range of values. It is meant that the maximum value of the shortest distance D1 (straight-line distance) between a dot 151a of a first region 154 and a corresponding reference point 153 may be greater than the maximum value of the shortest distance D2 (straight-line distance) between a dot 151a of a second region 155 and a corresponding reference point 153. Specifically, in the embodiment of FIG. 4, the spacing S between the multiple reference point columns 152 is the same, so the shortest distance D1 in the first region 154 is, for example, 0-30% of the spacing S between any two adjacent reference point columns 152, and the shortest distance D2 in the second region 155 is, for example, 0-10% of the spacing S between any two adjacent reference point columns 152

In the embodiment, since the brightness near the light incident surface 110 is higher than the brightness far from the light incident surface 110, the interference fringes are more easily generated on the display screen, and therefore, the dots 151a of the first region 154 are arranged in a more irregular arrangement (the first numerical range is larger than the second numerical range) than the dots 151a of the second region 155, and the interference fringes generated by the first region 154 or the second region 155 can be correspondingly improved, so that the overall brightness is more uniform. In addition, the light guide plate 100a of the present embodiment may also be used in combination with different features of other embodiments of the light guide plate 100 of fig. 2B to 2D, and the present invention is not particularly limited.

In another embodiment, the bottom surface 150a may further include a third region (not shown) between the first region 154 and the second region 155. The reference dot rows 152 and the dots 151a are also disposed in the third area. One side of the middle line M close to the light incident surface 110 includes the first region 154 and a portion of the third region, and the other side of the middle line M away from the light incident surface 110 includes the second region 155 and a portion of the third region (i.e., the middle line M is disposed in the third region). The arrangement of dots 151a in the third region is changed between the first region 154 and the second region 155. For example, the maximum value of the shortest distance between each dot 151a of the third region and each corresponding reference point 153 is smaller than the maximum value of the distance D1, but larger than the maximum value of the distance D2. In any embodiment of the light guide plate 100a, the arrangement of the dots 151a tends to gradually change from being close to the light incident surface 110 to being far from the light incident surface 110.

The numbers of the dots, the reference dot rows and the reference dots shown in fig. 2A to 4 are only examples, and the invention is not limited to the numbers.

In the display device of the invention, the light guide plate of the light source module is provided with a first side surface and a second side surface which are opposite, and a light emitting surface and a bottom surface which are opposite, and the first side surface and the second side surface are respectively adjacent to the light emitting surface and the bottom surface. The bottom surface is provided with a plurality of screen dots and a plurality of reference point columns, each reference point column comprises a plurality of reference points, the reference points are linearly arranged along the column direction from the first side surface to the second side surface, and the screen dots respectively correspond to the reference points of the reference point columns. Each mesh point is randomly distributed on each corresponding reference point along the row direction from the light incident surface to the far side from the light incident surface, one side of each reference point close to the light incident surface or one side of each reference point far from the light incident surface. In other words, the dots of the light guide plate are not regularly arranged on the bottom surface compared to the reference points, but may be slightly shifted from the positions of the regularly arranged reference points, i.e., arranged on the bottom surface in an approximately regular arrangement. Under the configuration, the dots of the light guide plate are not likely to be gathered due to the completely random configuration, and abnormal bright spots are generated on the display screen. Meanwhile, the dots can not generate interference fringes due to regular arrangement. Therefore, the light guide plate configured by the mesh points can improve the interference fringe phenomenon on the display picture, and further improve the quality of the display picture.

The above description is only a preferred embodiment of the present invention, and the scope of the present invention should not be limited thereby, and all the simple equivalent changes and modifications made according to the claims and the content of the specification should be included in the scope of the present invention. Moreover, it is not necessary for any embodiment or claim of the invention to achieve all of the objects or advantages or features disclosed herein. Furthermore, the abstract and the title of the specification are provided only for assisting the retrieval of patent documents and are not intended to limit the scope of the present invention. Furthermore, the terms "first", "second", and the like in the description or the claims are used only for naming elements (elements) or distinguishing different embodiments or ranges, and are not used for limiting the upper limit or the lower limit on the number of elements.

Claims

1. A light guide plate is characterized in that the light guide plate is provided with a light incident surface, a first side surface and a second side surface which are opposite to each other, and a light emitting surface and a bottom surface which are opposite to each other, the light incident surface is adjacent to the first side surface, the second side surface, the light emitting surface and the bottom surface, the first side surface and the second side surface are respectively adjacent to the light emitting surface and the bottom surface, the bottom surface is provided with a plurality of lattice points and a plurality of reference point rows,

the plurality of reference point rows extend in a row direction and are arranged along the row direction, wherein the row direction is a direction from the light incident surface to the far away from the light incident surface, the column direction is a direction from the first side surface to the second side surface, each of the plurality of reference point rows comprises a plurality of reference points, the plurality of reference points are arranged in a straight line along the column direction, and intervals between the adjacent reference point rows are the same or are gradually decreased along the row direction,

the plurality of dots respectively correspond to the plurality of reference points of the plurality of reference point rows, each of the plurality of dots is randomly distributed on each of the corresponding plurality of reference points along a direction perpendicular to the light incident surface, one side of each of the plurality of reference points close to the light incident surface or one side of each of the plurality of reference points far away from the light incident surface, and an orthographic projection of each of the plurality of dots on the light incident surface along the direction perpendicular to the light incident surface is overlapped with an orthographic projection of each of the corresponding plurality of reference points on the light incident surface along the direction perpendicular to the light incident surface,

at least one part of the mesh points are located on the corresponding reference points, and at least another part of the mesh points are located on one side, close to the light incident surface, of the corresponding reference points.

2. The light guide plate according to claim 1, wherein the bottom surface includes a first region and a second region, the first region is close to the light incident surface, the reference point rows and the dots are disposed in the first region and the second region, wherein a shortest distance between each of the dots of the first region and each of the corresponding reference points is between a first range of values, a shortest distance between each of the dots of the second region and each of the corresponding reference points is between a second range of values, and the first range of values is greater than the second range of values.

3. The light guide plate according to claim 1, wherein the spacing between the plurality of reference point columns decreases in the row direction, and each of the plurality of dots is spaced from each of the corresponding plurality of reference points by 0 to 30% of the spacing between any two adjacent reference point columns.

4. The light guide plate according to claim 1, wherein the interval between any two adjacent reference point columns is greater than a predetermined interval between any two adjacent reference points in each of the reference point columns.

5. The light guide plate according to claim 4, wherein each of the plurality of dots is spaced from each of the corresponding plurality of reference points by 0-30% of the spacing between any two adjacent reference point columns.

6. The light guide plate according to claim 1, wherein any two adjacent reference points in each of the reference point columns have a predetermined spacing therebetween, the predetermined spacing decreasing away from the light incident surface.

7. The light guide plate according to claim 1, wherein the row direction is parallel to the light incident surface, and an included angle between the row direction and the column direction is between 30 degrees and 90 degrees.

8. A display device, comprising a light source module and a display panel,

the light source module comprises a light guide plate and a light emitting element,

the light guide plate is provided with a light incident surface, a first side surface and a second side surface which are opposite to each other, and a light emitting surface and a bottom surface which are opposite to each other, the light incident surface is adjacent to the first side surface, the second side surface, the light emitting surface and the bottom surface, the first side surface and the second side surface are respectively adjacent to the light emitting surface and the bottom surface, the bottom surface is provided with a plurality of mesh points and a plurality of reference point rows,

the plurality of reference point rows extend in a row direction and are arranged along the row direction, wherein the row direction is a direction from the light incident surface to the far side of the light incident surface, the column direction is a direction from the first side surface to the second side surface, each of the plurality of reference point rows comprises a plurality of reference points, the plurality of reference points are arranged in a straight line along the column direction, and intervals among the plurality of reference point rows are the same or are gradually decreased along the row direction,

the plurality of dots respectively correspond to the plurality of reference points of the plurality of reference point rows, each of the plurality of dots is randomly distributed on each of the corresponding plurality of reference points along a direction perpendicular to the light incident surface, one side of each of the plurality of reference points close to the light incident surface or one side of each of the plurality of reference points far away from the light incident surface, and an orthographic projection of each of the plurality of dots on the light incident surface along a direction perpendicular to the light incident surface is overlapped with an orthographic projection of each of the corresponding plurality of reference points on the light incident surface along a direction perpendicular to the light incident surface,

at least one part of the mesh points are located on the corresponding reference points, and at least another part of the mesh points are located on one side, close to the light incident surface, of the corresponding reference points; and

the light-emitting element is arranged beside the light incident surface; and

the display panel is configured on the light emitting side of the light source module.

9. The display device according to claim 8, wherein the display panel comprises a plurality of pixel units arranged in an array, and a black matrix layer disposed around the plurality of pixel units, wherein a shortest distance from a center of each of the plurality of pixel units to a center of another adjacent pixel unit is a pixel pitch, and wherein the predetermined pitch between any two adjacent reference points in each of the plurality of reference point rows is less than twice the pixel pitch.

10. The display device according to claim 8, wherein the display panel comprises a plurality of pixel units arranged in an array, and a black matrix layer disposed around the plurality of pixel units, wherein a shortest distance from a center of each of the plurality of pixel units to a center of another adjacent pixel unit is a pixel pitch, and wherein the interval between any two adjacent reference point columns is greater than twice the pixel pitch but less than three times the pixel pitch.