CN210166528U - Light guide plate and display device - Google Patents
Light guide plate and display device Download PDFInfo
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- CN210166528U CN210166528U CN201921228700.0U CN201921228700U CN210166528U CN 210166528 U CN210166528 U CN 210166528U CN 201921228700 U CN201921228700 U CN 201921228700U CN 210166528 U CN210166528 U CN 210166528U
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Abstract
The application provides a light guide plate and display device, its characterized in that includes: the light guide plate body is provided with a light emitting surface; the micro-nano structure layer is positioned on the light emitting surface and/or the opposite side of the light emitting surface, and a plurality of micro-nano structures are distributed on the micro-nano structure layer; a plurality of concave structures are arranged between the adjacent micro-nano structures and/or on the micro-nano structures, and convex structures are arranged in the concave structures. The display device comprises the light guide plate. Through the micro-nano structure and the protruding structure, the times of light reflection and refraction are improved, light is uniformly dispersed, and the emitted light is more uniform.
Description
[ technical field ] A method for producing a semiconductor device
The application relates to the technical field of light guide plates, in particular to a light guide plate and a display device.
[ background of the invention ]
In accordance with the development of the information society, the demand for various types of display devices for displaying images has increased. Recently, various display devices such as a Liquid Crystal Display (LCD), a Plasma Display Panel (PDP), and an Organic Light Emitting Diode (OLED) display device have been utilized.
The liquid crystal display device should have a backlight unit to supply light from the outside. The backlight unit may include sub-units such as a light source, a light guide plate, a reflector, and an upper sheet, and may further include at least one frame or chassis (chassis) as a support structure to support the sides and the rear of the display device. Among the components of the backlight unit, the Light Guide Plate (LGP) is a planar member for uniformly guiding light from the light source to the entire display device, and may include a predetermined pattern formed on at least one surface of the planar member for the purpose of uniformly distributing the light, etc.
However, the conventional glass light guide plate has a problem of uneven light guide.
[ Utility model ] content
In view of the above, embodiments of the present disclosure provide a light guide plate and a display device to solve the above technical problems.
One technical scheme of the application is as follows:
a light guide plate comprising: the light guide plate body is provided with a light emitting surface;
the micro-nano structure layer is positioned on the light emitting surface and/or the opposite side of the light emitting surface, and a plurality of micro-nano structures are distributed on the micro-nano structure layer; concave structures are arranged between the adjacent micro-nano structures and/or on the micro-nano structures, and convex structures are arranged in the concave structures.
In one embodiment, the light guide plate body has a light incident surface, and the distribution density of the plurality of concave structures is gradually increased along a direction away from the light incident surface.
In one embodiment, the plurality of recessed structures are randomly distributed on the plurality of micro-nano structures. In one embodiment, the recessed feature has sloped sidewalls.
In one embodiment, the area of the opening of the recessed structure is larger than the area of the bottom of the recessed structure.
In one embodiment, the micro-nano structures are cylindrical mirrors arranged in an array, the concave structures are circumferential and have calibers not larger than the width of the cylindrical mirrors, and the concave structures are randomly distributed at intervals along the extending direction of the cylindrical mirrors.
In one embodiment, the concave structure is concave to the bottom of the cylindrical mirror.
In one embodiment, the depth of the recessed structure is not greater than the height of the micro-nano structure.
In one embodiment, on a projection plane parallel to the light incident surface, the concave structures are triangular, polygonal, circular, elliptical or irregular.
In one embodiment, the sidewall of the recessed structure has a gap with the raised structure.
In one embodiment, the micro-nano structure and the protruding structure are arranged at intervals.
In one embodiment, the cross-sectional shape of the convex structure is one or a combination of two or more of a triangle, a trapezoid, an arch, a polygon or a special shape.
In one embodiment, only one of the raised structures is disposed within each of the recessed structures.
A display device comprises the light guide plate.
The technical scheme provided by the application can achieve the following beneficial effects:
the application provides a light guide plate, the surface of this light guide plate forms the micro-nano structure layer, improves the leaded light effect of light guide plate, and sets up the sunk structure on the micro-nano structure layer, sets up protruding structure in the sunk structure, improves the number of times that light reflects and refracts through setting up of micro-nano structure and protruding structure, makes the even scattering of light, and then the more even of the light that jets out.
The application provides a display device adopts this kind of light guide plate, can make light more even like this.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a light guide plate according to an embodiment of the present disclosure;
fig. 2 is a schematic view of another structure of a light guide plate according to an embodiment of the present disclosure;
fig. 3 is a schematic view of another structure of a light guide plate according to an embodiment of the present disclosure;
fig. 4 is a schematic view of another structure of a light guide plate according to an embodiment of the present disclosure;
fig. 5 is a schematic view of another structure of a light guide plate according to an embodiment of the present disclosure;
fig. 6 is a top view of the light guide plate according to fig. 5 provided in the embodiment of the present application;
fig. 7 is a schematic view of another structure of a light guide plate according to an embodiment of the present disclosure;
fig. 8 is a top view of the light guide plate according to fig. 7 provided in the embodiment of the present application;
fig. 9 is a top view of a micro-nano structure of a light guide plate according to an embodiment of the present application;
fig. 10 is a top view of another micro-nano structure of a light guide plate according to an embodiment of the present application.
Reference numerals:
10-a light guide plate body;
20-micro-nano structure layer;
201-micro nano structure;
202-a recessed structure;
203-raised structure.
[ detailed description ] embodiments
For better understanding of the technical solutions of the present application, the following detailed descriptions of the embodiments of the present application are provided with reference to the accompanying drawings.
It should be understood that the embodiments described are only a few embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The terminology used in the embodiments of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the examples of this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
It should be noted that the terms "upper", "lower", "left", "right", and the like used in the embodiments of the present application are described in terms of the angles shown in the drawings, and should not be construed as limiting the embodiments of the present application. In addition, in this context, it will also be understood that when an element is referred to as being "on" or "under" another element, it can be directly on "or" under "the other element or be indirectly on" or "under" the other element via an intermediate element.
Referring to fig. 1-10, in one embodiment, the present application provides a light guide plate for a display device, which can make light more uniform. The display device is also called a display, can be used in the fields of televisions, computers and the like, and is used for displaying images; meanwhile, the display device can also be applied to the field of mobile phone shells, images are designed on the back of some mobile phone shells, and then the images are displayed through transparent glass or plastic materials; through the arrangement of the light guide plate, light can be more uniform, and the visual effect is better.
The light guide plate comprises a light guide plate body 10 and a micro-nano structure layer 20, wherein the light guide plate body 10 is provided with a light-emitting surface, the micro-nano structure layer 20 is positioned on the opposite side of the light-emitting surface and/or the light-emitting surface, the micro-nano structure layer 20 is provided with a plurality of micro-nano structures 201, so that the micro-nano structure layer 20 is formed, and the light guide effect of the light guide plate; meanwhile, concave structures 202 are arranged between adjacent micro-nano structures 201 or the micro-nano structures 201, and convex structures 203 are arranged in the concave structures 202, so that the times of light reflection and refraction are increased, light is uniformly dispersed, and the emitted light is more uniform.
In addition, the micro-nano structures 201 may be arranged without intervals or at intervals.
The micro-nano structure layer 20 can be photo-cured or thermal-cured; the micro-nano structure layer 20 can be made of UV glue and can be directly arranged on the light guide plate body 10. Generally, the forming mode is stamping, and stamping is a forming method for forming fluctuant bulges, character patterns or decorative patterns on the surface of a workpiece by placing a plate material between an upper die and a lower die, changing the thickness of the material under the action of pressure and filling the extruded material in the convex and concave cavities of a die cavity with fluctuant fine grains; the embossing is mostly performed in a closed mold cavity, so as to prevent the material from being extruded out of the mold after being pressed.
The micro-nano structure layer 20 may be made of PC, and may be directly disposed on the light guide plate body 10 (or the micro-nano structure layer 20 and the light guide plate body 10 are of an integral structure), and the processing method is generally a mold forming method by melting.
The transparent light guide plate main body is a glass plate, a PC plate, a PMMA plate, or an MS plate.
In the embodiment of the present application, the light guide plate body 10 has a light incident surface, and the density of the plurality of recessed structures 202 gradually increases along the direction away from the light incident surface. Since the light incident surface is located on one side of the light guide plate body 10, and the light source is disposed on the side, the light guide plate body 10 may also be disposed with a light source on a display device on which the light guide plate body 10 is mounted, and the light source enters the light guide plate body 10 through the light incident surface of the light guide plate body 10, so as to make the light uniform, the density of the plurality of concave structures 202 gradually increases along the direction away from the light incident surface. That is, when the light source is located at the light incident surface of the light guide plate body 10, the density of the concave structures 202 on the light guide plate body 10 far away from the light source (light incident surface) is higher, and the density of the concave structures 202 on the light guide plate body 10 near the light source (light incident surface) is lower; because the light ray is dark far away from the light source, the times of light ray reflection and refraction are improved by increasing the number of the concave structures 202, and the light ray emitted by the light guide plate is more uniform; meanwhile, the dark corners can be eliminated, namely, the corners of the light guide plate cannot have dark corners.
In the embodiment of the present application, the area of the opening of the recessed structure 202 is larger than the area of the bottom of the recessed structure 202, which facilitates the imprinting and increases the area of the light emitting surface.
Wherein, as shown in fig. 1 and fig. 2, recessed structure 202 has an inclined side wall, because the propagation route of light is different, the setting of inclined side wall can make light scatter easily, and then make the light of shooing more even, micro-nano structure 201 in fig. 1 sets up in succession, wherein be equipped with recessed structure 202 on micro-nano structure 201, recessed structure 202 cuts micro-nano structure 201, protruding structure 203 locates in recessed structure 202, wherein, the area of recessed structure 202 opening part is greater than the area of protruding structure 203 bottom, the bottom surface area of recessed structure 203 indicates the area with recessed structure 202 bottoming.
Referring to fig. 2, the protruding structure 203 is disposed on the micro-nano structure 201, wherein the bottom area of a part of the recessed structure 202 is smaller than the bottom area of the micro-nano structure 201, and the protruding structure 203 is disposed, and the bottom area of the protruding structure 203 is equal to the bottom area of the recessed structure 202; a part of the concave structure 202 directly cuts off the micro-nano structure 201, and the area of the opening of the concave structure 202 is larger than the area of the bottom of the convex structure 203.
In other ways, please refer to fig. 3, the concave structure 202 is disposed on the micro-nano structure 201 and does not intercept the micro-nano structure 201, wherein the bottom surface area of the convex structure 203 is not greater than the bottom surface area of the concave structure 202; or in fig. 4, the recessed structure 202 is located between adjacent micro-nano structures 201, and does not cut off two adjacent micro-nano structures 201.
Referring to fig. 6 and fig. 8, which are top views of a light guide plate, the concave structures 202 in fig. 6 are randomly distributed and are located in the micro-nano structure 201 region, the convex structures 203 are located in the concave structures 202, the cross-sectional views are shown in fig. 5, fig. 8 is a cross-sectional view corresponding to that shown in fig. 7, and the concave structures 202 in fig. 8 cut off the micro-nano structure 201.
As shown in fig. 9 to 10, the micro-nano structure 201 is cut off by the recessed structure 202, the recessed structure 202 includes two inclined sidewalls located at the cut-off of the micro-nano structure 201, and the two sidewalls have the same or different shapes.
The bottom edge of the side wall is a straight line, a curved line, or a broken line. The bottom edge can be located on the light guide plate body 10, and can also be located on a residual glue layer (the light guide plate body 10 is coated with UV glue, the micro-nano structure 201 and the concave structure 202 are formed by stamping, curing and demolding through a mold, and a layer of glue, namely the residual glue layer, can not be stamped on the main body during stamping.
The micro-nano structures 201 are cylindrical mirrors arranged in an array mode, the concave structures 202 are circumferential, the calibers of the concave structures are not larger than the width of the cylindrical mirrors, and the concave structures 202 are distributed at intervals in the extending direction of the cylindrical mirrors at random. The circumferential shape is a circle, an ellipse, or the like, and the caliber is the widest point.
It should be noted that the concave structure 202 is concave to the bottom of the cylindrical mirror. The area of the light-emitting surface is increased, the times of light reflection and refraction are increased, and the emitted light is more uniform.
In the embodiment of the application, the depth of the recessed structure 202 is not greater than the height of the micro-nano structure 201. Generally, the depth of the concave structure 202 is the same as the height of the micro-nano structure 201, so that the area of the light-emitting surface is increased, the times of light reflection and refraction are increased, and the emitted light is more uniform.
The concave structure 202 is triangular, polygonal, circular, elliptical or irregular in a projection plane parallel to the light incident plane. The purpose is to improve the times of light reflection and refraction and make the emitted light more uniform.
Wherein, the sidewall of the concave structure 202 and the convex structure 203 have a gap. The number of times of reflection and refraction of light is improved, so that the light is uniformly scattered, and the emitted light is more uniform.
It should be noted that the micro-nano structure 201 includes one or a combination of more than two of a linear cylindrical mirror, a curved cylindrical mirror, and a polygonal line cylindrical mirror, and the cross-sectional shape of the micro-nano structure 201 is triangular, trapezoidal, or arcuate. The purpose is to increase the area of the light-emitting surface, improve the times of light reflection and refraction and enable the emitted light to be more uniform.
It should be further noted that the cross-sectional shape of the protruding structure 203 includes one or a combination of two or more of a triangle, a trapezoid, an arch, a polygon, and a special shape.
It should be further noted that the micro-nano structure 201 on the transparent light guide plate main body is formed by stamping through a mold, so that a stamping body arranged in a mirror image with the micro-nano structure 201 is provided, the stamping body is arranged on the support layer, and when the micro-nano structure is used, the micro-nano structure directly stamps the light guide plate, so that the micro-nano structure has the advantages of simple process and good effect.
In the embodiment of the application, the opposite side of the light emitting surface is provided with the reflective layer, and when the micro-nano structure 201 is located at the opposite side of the light emitting surface, the reflective layer is arranged at one side of the micro-nano structure 201 far away from the light guide plate body 10.
It should be noted that, according to the structural design of the light guide plate body 10 of the present embodiment, the shape of the micro/nano structure 201 is changed by the manufacturing process technology (hot pressing process, dry etching process, wet etching process, etc.), so as to effectively increase the angle of light source divergence, increase the effect of light source scattering, and further improve the brightness difference, dark angle and light-out dark portion of the picture.
In another embodiment, a bonding layer may be disposed between the light guide plate body 10 and the micro-nano structure layer 20, so that the micro-nano structure layer 20 can be firmly bonded to the light guide plate body 10.
Specifically, the refractive index of the light guide plate body 10 is n1, the refractive index of the micro-nano structure 201 is n2, the absolute value of the difference between n1 and n2 is not more than 0.5, and the loss of incident light in the transmission process is guaranteed to be small.
Specifically, the refractive index of the light guide plate body 10 is n1, the refractive index of the micro-nano structure 201 is n2, and the refractive index of the bonding layer is n3, wherein the absolute value of the difference between any two of n1, n2 and n3 is not more than 0.5, so that the loss of incident light in the transmission process is small.
The present invention is not intended to be limited to the particular embodiments shown and described, but is to be accorded the widest scope consistent with the principles and novel features herein disclosed.
Claims (14)
1. A light guide plate, comprising:
the light guide plate body is provided with a light emitting surface;
the micro-nano structure layer is positioned on the light emitting surface and/or the opposite side of the light emitting surface, and a plurality of micro-nano structures are distributed on the micro-nano structure layer;
a plurality of concave structures are arranged between the adjacent micro-nano structures and/or on the micro-nano structures, and convex structures are arranged in the concave structures.
2. The light guide plate according to claim 1, wherein the light guide plate body has a light incident surface, and the distribution density of the plurality of concave structures gradually increases along a direction away from the light incident surface.
3. The light guide plate according to claim 1, wherein the plurality of recessed structures are randomly distributed on the micro-nano structure layer.
4. The light guide plate according to claim 3, wherein the depressed structures have inclined sidewalls.
5. The light guide plate according to claim 4, wherein the area of the opening of the concave structure is larger than the area of the bottom of the concave structure.
6. The light guide plate according to claim 1, wherein the micro-nano structures are cylindrical mirrors arranged in an array, the caliber of each concave structure is not greater than the width of each cylindrical mirror, and the concave structures are randomly distributed on the cylindrical mirrors.
7. The light guide plate according to claim 6, wherein the concave structure is concave to the bottom of the cylindrical mirror.
8. The light guide plate according to claim 1, wherein the depth of the recessed structures is not greater than the height of the micro-nano structures.
9. The light guide plate according to claim 1, wherein the concave structures have a triangular, polygonal, circular, elliptical or irregular shape on a projection plane parallel to the light exit plane.
10. The light guide plate according to claim 1, wherein the side walls of the concave structures have gaps with the convex structures.
11. The light guide plate according to claim 1, wherein the micro-nano structures and the protruding structures are arranged at intervals.
12. The light guide plate according to any one of claims 1 to 10, wherein the cross-sectional shape of the convex structures is one or a combination of two or more of triangular, trapezoidal, arcuate, polygonal or irregular.
13. The light guide plate according to any one of claims 1 to 10, wherein only one of the convex structures is disposed in each of the concave structures.
14. A display device comprising the light guide plate according to any one of claims 1 to 13.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921228700.0U CN210166528U (en) | 2019-07-31 | 2019-07-31 | Light guide plate and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921228700.0U CN210166528U (en) | 2019-07-31 | 2019-07-31 | Light guide plate and display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210166528U true CN210166528U (en) | 2020-03-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921228700.0U Active CN210166528U (en) | 2019-07-31 | 2019-07-31 | Light guide plate and display device |
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|---|---|
| CN (1) | CN210166528U (en) |
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- 2019-07-31 CN CN201921228700.0U patent/CN210166528U/en active Active
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