CN111781669B - Light guide plate - Google Patents
Light guide plate Download PDFInfo
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- CN111781669B CN111781669B CN201910265587.1A CN201910265587A CN111781669B CN 111781669 B CN111781669 B CN 111781669B CN 201910265587 A CN201910265587 A CN 201910265587A CN 111781669 B CN111781669 B CN 111781669B
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- light
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- guide plate
- light guide
- nano structures
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/004—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles
- G02B6/0043—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles provided on the surface of the light guide
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
- G02B6/0055—Reflecting element, sheet or layer
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0066—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form characterised by the light source being coupled to the light guide
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Planar Illumination Modules (AREA)
- Light Guides In General And Applications Therefor (AREA)
Abstract
The invention discloses a light guide plate, which comprises a body, a light source and a plurality of micro-nano structures, wherein the body comprises a light-emitting surface and at least one light-in surface; the light source is positioned on the light incidence surface side of the body; the light guide plate comprises a body, a plurality of micro-nano structures and a light source, wherein the light source is arranged on the light emergent surface side of the body, the micro-nano structures are distributed on the opposite side of the light emergent surface, the micro-nano structures extend towards the light incident surface and gradually gather towards the light source, and the distribution width of the micro-nano structures close to the light incident surface is smaller than that of the micro-nano structures far away from the light incident surface, so that incident light of the light guide plate is converted into uniform light, light and shade at intervals on the light guide plate are eliminated, and the definition of the liquid crystal display screen on an edge image is improved.
Description
Technical Field
The invention relates to the technical field of backlight modules, in particular to a light guide plate.
Background
With the development of liquid crystal displays, backlight modules are used as important components of liquid crystal displays to provide sufficient brightness and uniformly distributed light sources so that the liquid crystal displays can display images normally. The backlight module generally includes a light source, a light guide plate, an optical film, and at least one frame or chassis as a support structure for supporting the sides and the back of the display device. The backlight module is divided into a side light-in type and a direct type according to different incident positions of light sources, wherein the side light-in type backlight module is characterized in that the light sources are arranged on one side of the light guide plate, and in the backlight module with small and medium sizes, the side light-in type is relative to the direct type.
The light guide plate in the backlight module is used for uniformly guiding the point light source to the whole plane of the visual area display device, wherein the light guide plate also comprises a pattern which is formed in advance on the plane of the light guide plate for enabling the light to be uniformly emitted from the light emitting surface. Nowadays, the light source is generally a point light source, so that light rays emitted by the edge light source in the visible area are alternately bright and dark, and if the light incident surface has the condition of alternately bright and dark, the light of the products is uneven, the image is not clear, and the requirements of people cannot be met.
Disclosure of Invention
Accordingly, the present invention provides a light guide plate to solve the above problems.
The technical scheme of the light guide plate is as follows:
a light guide plate, comprising:
the light source comprises a body and a light source, wherein the body comprises a light emergent surface and at least one light incident surface;
a light source located on the light entrance surface side;
the light source comprises a plurality of micro-nano structures which are distributed on the side of the light emergent face and/or the opposite side of the light emergent face, the plurality of micro-nano structures extend towards the light incident face and gradually gather towards the light source, and the distribution width of the plurality of micro-nano structures at the position close to the light incident face is smaller than the distribution width of the plurality of micro-nano structures far away from the light incident face.
In one embodiment, the micro-nano structure is in a long strip shape and comprises a bending portion and a linear portion, the bending portion is smoothly connected with the linear portion, the light source is a point light source, and the bending portion of the plurality of micro-nano structures extends towards the light incident surface and converges towards the point light source.
In one embodiment, the linear portions of the micro-nano structures are arranged at equal intervals.
In one embodiment, the shape of the curved portion of the micro-nano structures is one or a combination of two or more of an arc shape, an s shape, a zigzag shape, a wavy line shape or an irregular curved shape.
In one embodiment, the light-emitting surface includes a visible region and an invisible region, the invisible region is symmetrically disposed on two sides of the visible region, and at least one bending portion is disposed on the invisible region.
In one embodiment, the micro-nano structure is a cylindrical mirror arrangement, a small short line or a micro-lens arrangement.
In one embodiment, the plurality of micro-nano structures arranged at intervals and/or continuously are arranged in a plurality of convex structures and/or concave structures.
In one embodiment, the cross section of the plurality of convex structures and/or concave structures is one or a combination of two or more of arc, semicircle, triangle or polygon.
In one embodiment, the light guide plate includes a bearing layer, and the plurality of micro-nano structures are located on one side of the bearing layer, which is far away from the body.
In one embodiment, a first adhesive layer is disposed between the light source and the light incident surface side.
In one embodiment, a second adhesive layer is disposed between the carrier layer and the body.
In one embodiment, the light guide plate comprises a reflection layer, and the reflection layer is positioned on the same side or the opposite side of the body on which the plurality of micro-nano structures are arranged.
The invention has the beneficial effects that: according to the light guide plate provided by the invention, the distribution width of the plurality of micro-nano structures close to the light incident surface is smaller than the distribution width of the plurality of micro-nano structures far away from the light incident surface, and the plurality of micro-nano structures are gathered towards the light source.
Drawings
FIG. 1 is a schematic view of a light guide plate according to the present invention;
FIG. 2 isbase:Sub>A schematic cross-sectional view A-A' of FIG. 1 according to the present invention;
FIG. 3 is a schematic view of another structure of a light guide plate according to the present invention;
FIG. 4 is a schematic view of another structure of a light guide plate according to the present invention;
FIG. 5 is a schematic view of another structure of a light guide plate according to the present invention;
FIG. 6 is a schematic view of another structure of a light guide plate according to the present invention;
FIG. 7 is a schematic cross-sectional view of a light guide plate according to still another embodiment of the present invention;
FIG. 8 is a schematic cross-sectional view of a light guide plate according to still another embodiment of the present invention;
FIG. 9 is a schematic cross-sectional view of a light guide plate according to still another embodiment of the present invention;
Detailed Description
In order that the invention may be more readily understood, reference will now be made to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. However, the present invention may be embodied in many different forms and is not limited to the embodiments described below. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The invention provides a light guide plate which comprises a body, a light source and a plurality of micro-nano structures, wherein the body comprises a light emergent surface and at least one light incident surface; the light source is positioned on the light incidence surface side of the body; the light source comprises a body, a plurality of micro-nano structures and a light source, wherein the light source is arranged on the light emergent surface side of the body, the plurality of micro-nano structures are distributed on the opposite side of the light emergent surface and/or the light emergent surface, the plurality of micro-nano structures extend towards the light incident surface and gradually gather towards the light source, and the distribution width of the plurality of micro-nano structures at the position close to the light incident surface is smaller than that of the plurality of micro-nano structures far away from the light incident surface, so that incident light of the light guide plate is converted into uniform light, light and shade at intervals on the light guide plate are eliminated, and the definition of the liquid crystal display screen on an edge image is improved.
In one embodiment, the body comprises at least one light incident surface, so that light from the light source can enter the body, and the light source is a point light source or a strip light source; in other modes, the body can further comprise more than two light incident surfaces, and the light incident surfaces can be adjacently arranged or oppositely arranged.
In one embodiment, the micro-nano structure is in a long strip shape and comprises a bending part and a linear part which are connected smoothly, the bending parts of the micro-nano structures converge towards the point light source or the strip light source, and the linear parts are arranged at equal intervals.
In one embodiment, the light emergent surface comprises a visible region and an invisible region, and the light incident surface is arranged on one side of the invisible region, which is far away from the visible region; the invisible area is symmetrically arranged, and at least one bending part is arranged on the invisible area.
In one embodiment, the single micro-nano structure may be a whole cylindrical mirror, a small short line, or a micro-lens arranged in a straight portion and a curved portion. The bending part of the plurality of micro-nano structures can be one or the combination of more than two of arc, s-shaped, zigzag, wavy or irregular curve, the bending part extends to the edge of the light incoming surface of the body, the light guide channel formed by the plurality of micro-nano structures enables light emitted by the light source to be dispersed, and uniform light is formed at the junction of the visible area and the invisible area of the body and enters the body of the light guide plate.
In one embodiment, the plurality of micro-nano structures are a plurality of convex structures and/or concave structures, and the plurality of convex structures and/or concave structures are arranged at intervals and/or continuously, wherein the cross section of the plurality of convex structures and/or concave structures is one or a combination of more than two of arc, semicircle, triangle or polygon.
In one embodiment, the light guide plate further comprises a first bonding layer, the bending part of the plurality of micro-nano structures can extend to the edge of the light incident surface of the body, and the light source is connected with the light incident surface side of the body through the first bonding layer, so that the bending part of the plurality of micro-nano structures can play a light guide role.
In one embodiment, the light guide plate comprises a bearing layer, the plurality of micro-nano structures are positioned on one side of the bearing layer far away from the body, and when the bearing layer and the plurality of micro-nano structures are arranged in an integrated structure, the bearing layer can be light curing or heat curing glue such as UV glue, OCA glue and the like; when the bearing layer and the plurality of micro-nano structures are not of an integral structure, the bearing layer can be made of materials with better light transmission such as PET, PMMA, PC and the like.
In one embodiment, the plurality of micro-nano structures are arranged on one side of the bearing layer, a second bonding layer is further arranged between the other side of the bearing layer opposite to the plurality of micro-nano structures and the light emergent surface side or the opposite side of the light emergent surface of the body, and the bearing layer is attached to the body of the light guide plate.
In one embodiment, the light guide plate further comprises a reflection layer, and the reflection layer is located on the opposite side or the same side of the body, on which the plurality of micro-nano structures are arranged. When the plurality of micro-nano structures are arranged on the same side of the light-emitting surface, the opposite side of the light-emitting surface is provided with the reflecting layer, light is transmitted in the body and finally emitted out through the plurality of micro-nano structures, and the light can be effectively prevented from being totally reflected in the body; when the plurality of micro-nano structures are arranged on the opposite side of the light-emitting surface of the body, the reflecting layer is arranged on one side of the plurality of micro-nano structures away from the body, so that light can be uniformly emitted from the light-emitting surface of the body of the light guide plate by utilizing the plurality of micro-nano structures and the reflecting layer.
The following description will be made with reference to the drawings by way of example, in which the present invention provides a light guide plate.
Referring to fig. 1, a light guide plate 100 according to the present invention includes a body 10, a plurality of micro-nano structures 20, and a point light source 30. The main body 10 includes a light incident surface and a light emergent surface, the light incident surface includes a visible region 12 and an invisible region 11, the invisible region 11 is symmetrically disposed, and the light incident surface of the main body 10 is disposed on a side of the invisible region 11 away from the visible region 12. The point light source 30 is located on the light incident surface side of the body 10. The micro-nano structure 20 is a whole cylindrical mirror, the plurality of micro-nano structures 20 are located on the light emergent surface side of the body 10, each micro-nano structure 20 comprises a linear portion 201 and a bending portion 202, and the bending portion 202 is located in the invisible area 11 close to the point light source 30. When the light guide plate 100 is provided with two light incident surfaces, the bent parts 202 of the plurality of micro-nano structures 20 are arranged in the symmetrically arranged invisible areas 11; when the light guide plate 100 is provided with an incident surface, the plurality of linear portions 201 of the micro-nano structures 20 are arranged in the invisible area 11 away from the incident surface, and the linear portions 201 are arranged at equal intervals. In the figure, the curved portion 202 is s-shaped and extends to the edge of the light incident surface of the main body 10, so that the light of the point light source 30 on the light incident surface side of the main body 10 is dispersed and converted into uniform light incident at the boundary between the visible region 12 and the invisible region 11, thereby avoiding the phenomenon of alternate light and dark at the boundary between the visible region 12 and the invisible region 11 of the main body 10.
Referring to fig. 2, fig. 2 isbase:Sub>A schematic view ofbase:Sub>A cross-sectional structurebase:Sub>A-base:Sub>A' of the light guide plate 100 of fig. 1, the micro-nano structures 20 are located on the light emergent surface side of the body 10, and the micro-nano structures 20 arebase:Sub>A plurality of protruding structures, wherein the plurality of protruding structures are continuously arranged; in other embodiments, the micro-nano structures 20 may also be a plurality of concave structures or a plurality of convex structures and/or a plurality of concave structures, and the plurality of convex structures and/or the plurality of concave structures are spaced and/or arranged continuously. The cross section of the micro-nano structure 20 is arc-shaped, and in other modes, the cross section can be one or a combination of more than two of arc-shaped, semicircular, triangular or polygonal.
Referring to fig. 3, the curved portions 203 of the micro-nano structures 20 are arc-shaped and converge toward the point light source 30, and in other manners, the curved portions 203 may also be wavy lines or irregular curves.
Referring to fig. 4, the curved portion 204 of the micro-nano structure 20 is in a three-fold line shape and is focused toward the point light source 30, and the first adhesive layer 40 is disposed between the point light source 30 and the light incident surface, so that the light of the point light source 30 is dispersed to be uniform light incidence at the joint between the visible region 12 and the invisible region 11 close to the point light source 30 through the conduction of the curved portion 204, and the existence of light and dark alternate shadows at the joint between the visible region 12 and the invisible region 11 is avoided. In other embodiments, the point light source 30 may be directly connected to the light incident surface of the body 10.
Referring to fig. 5, the micro-nano structures 21 can also be arranged in small short lines; similarly, the micro-nano structure 21 with the small short lines comprises a linear part 211 and a bending part 212, wherein the bending part 212 concentrates on the point light source 30, and the bending part 211 is positioned in the invisible area 11; as shown in fig. 6, the micro-nano structures 22 may also be micro-lenses, and the micro-nano structures 22 of the micro-lenses include linear portions 221 and curved portions 222, and similarly, the curved portions 222 are concentrated toward the point light sources 30 and extend to the edges of the light incident surface. The arrangement of the small short lines or the micro lenses can also play a role of transmitting light rays, and the phenomenon that light and shade are alternated between the visible area 12 and the invisible area 11 is eliminated.
Referring to fig. 7, fig. 7 is another schematic cross-sectional structure diagram, the light guide plate 100 further includes a carrier layer 50, the micro-nano structures 20 are continuous protruding structures and are located on a side of the carrier layer 50 away from the body 10, and the carrier layer 50 and the micro-nano structures 20 are integrally disposed. The light guide plate 100 further includes a reflective layer 60, and the reflective layer 60 is located at an opposite side of the light emitting surface of the body 10, so that light is emitted through the micro-nano structures 20 when propagating in the body 10, and total reflection of light in the body 10 of the light guide plate can be effectively prevented.
Preferably, when the bearing layer 50 and the plurality of micro-nano structures 20 are arranged in an integrated structure, the bearing layer 50 can be light-cured glue or heat-cured glue such as UV glue, OCA glue and the like; when the supporting layer 50 and the micro-nano structures 20 are not an integral structure, the supporting layer 50 may be made of PET, PMMA, PC, or other materials with good light transmittance.
Referring to fig. 8, the light guide plate 100 includes a second adhesive layer 70, the second adhesive layer 70 is located on a side of the carrier layer 50 away from the micro-nano structures 20, and the carrier layer 50 is attached to a light-emitting surface side of the body 10. The reflective layer 60 is located on the opposite side of the light-emitting surface of the body 10 to prevent the light from being totally reflected in the body 10.
Referring to fig. 9, the micro-nano structures 20 are located on opposite sides of the light-emitting surface of the body 10, the micro-nano structures 20 are arranged in a protruding structure, and one side of the bearing layer 50 is provided with protruding structures arranged at intervals; the other side of the bearing layer 50, which is relatively provided with the plurality of micro-nano structures 20, is attached to the opposite side of the light-emitting surface of the body 10 through the third adhesive layer 80, and the reflective layer 60 is located on one side of the plurality of micro-nano structures 20, which is far away from the body 10, so that light can be uniformly emitted from the light-emitting surface of the body 10 by using the plurality of micro-nano structures 20 and the reflective layer 60, and the image of the display is clearer.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail. In the above description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Moreover, the technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is specific and detailed, but not to be understood as limiting the scope of the present invention. It should be noted that various changes and modifications can be made by those skilled in the art without departing from the spirit of the invention, and these changes and modifications are all within the scope of the invention. Therefore, the protection scope of the present patent should be subject to the appended claims.
Claims (9)
1. A light guide plate, comprising:
the light source comprises a body and a light source, wherein the body comprises a light emergent surface and at least one light incident surface;
a point light source located on the light entrance surface side;
the light source comprises a plurality of micro-nano structures, a plurality of light sources and a plurality of light-emitting diodes, wherein the micro-nano structures are distributed on the side of the light-emitting surface and/or the opposite side of the light-emitting surface, the micro-nano structures extend towards the light-in surface and gradually gather towards the light source, and the distribution width of the micro-nano structures close to the light-in surface is smaller than that of the micro-nano structures far away from the light-in surface;
the micro-nano structure is in a long strip shape and comprises a bending part and a linear part which are connected smoothly, the bending parts of the micro-nano structure converge towards the point light source, and the linear parts are arranged at equal intervals;
the light-emitting surface comprises a visible area and an invisible area, the invisible area is symmetrically arranged on two sides of the visible area, and at least one bending part is arranged on the invisible area.
2. The light guide plate according to claim 1, wherein the curved portions of the micro-nano structures are in the shape of one or a combination of two or more of an arc, an s-shape, a polygonal line, a wavy line or an irregular curve.
3. The light guide plate according to claim 1, wherein the micro-nano structure is a cylindrical mirror arrangement, a small stub or a micro-lens arrangement.
4. The light guide plate according to claim 1, wherein the plurality of micro-nano structures arranged at intervals and/or continuously are arranged in a plurality of convex structures and/or concave structures.
5. The light guide plate according to claim 4, wherein the cross-section of the plurality of convex structures and/or concave structures is one or a combination of two or more of arc, semicircle, triangle or polygon.
6. The light guide plate according to claim 1, wherein a first adhesive layer is provided between the light source and the light incident surface side.
7. The light guide plate according to any one of claims 1 to 6, wherein the light guide plate comprises a bearing layer, and the plurality of micro-nano structures are positioned on one side of the bearing layer, which is far away from the body.
8. The light guide plate according to claim 7, wherein a second adhesive layer is disposed between the carrier layer and the body.
9. The light guide plate according to any one of claims 1 to 6, wherein the light guide plate comprises a reflective layer, and the reflective layer is located on the same side or opposite sides of the body on which the plurality of micro-nano structures are disposed.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910265587.1A CN111781669B (en) | 2019-04-03 | 2019-04-03 | Light guide plate |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910265587.1A CN111781669B (en) | 2019-04-03 | 2019-04-03 | Light guide plate |
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| CN111781669A CN111781669A (en) | 2020-10-16 |
| CN111781669B true CN111781669B (en) | 2022-10-04 |
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| CN115220145A (en) * | 2022-08-22 | 2022-10-21 | 扬昕科技(苏州)有限公司 | Backlight module and light guide plate |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2596387Y (en) * | 2003-01-09 | 2003-12-31 | 山太士股份有限公司 | Light guide plate structure |
| CN100498389C (en) * | 2006-03-25 | 2009-06-10 | 鸿富锦精密工业（深圳）有限公司 | Light conducting plate and back light module |
| TWI324276B (en) * | 2006-03-31 | 2010-05-01 | Hon Hai Prec Ind Co Ltd | Light guide plate and backlight module using the same |
| CN101183192B (en) * | 2006-11-13 | 2011-02-09 | 嘉威光电股份有限公司 | Back light module unit |
| CN102121668A (en) * | 2010-01-11 | 2011-07-13 | 中强光电股份有限公司 | Light guide plate and backlight module |
| CN207817246U (en) * | 2018-02-06 | 2018-09-04 | 扬昕科技(苏州)有限公司 | Light guide plate and light source module |
| CN209606654U (en) * | 2019-04-03 | 2019-11-08 | 昇印光电（昆山）股份有限公司 | A kind of light guide plate |
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