CN104111490A - Light-guiding plate and backlight module - Google Patents
Light-guiding plate and backlight module Download PDFInfo
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- CN104111490A CN104111490A CN201310133288.5A CN201310133288A CN104111490A CN 104111490 A CN104111490 A CN 104111490A CN 201310133288 A CN201310133288 A CN 201310133288A CN 104111490 A CN104111490 A CN 104111490A
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- light
- backlight module
- guide plate
- light guide
- exiting surface
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Abstract
Provided is a light-guiding plate that comprises a light incoming surface, a light outgoing surface, a bottom surface opposite to the light outgoing surface, a first side surface, and a second side surface, wherein the first side surface and the second side surface are connected with the light outgoing surface and the bottom surface. The light incoming surface is connected with the light outgoing surface, the bottom surface, the first side surface, and the second side surface. The bottom surface is provided with reflection microstructures which are V-shaped grooves arranged in concentric circle shapes. The cross section of the V-shaped grooves along the direction of the radiuses of the concentric circles is an isosceles triangle with a vertex angle of 80 degrees. The invention also relates to a backlight module containing the light-guiding plate.
Description
Technical field
The present invention relates to a kind of light guide plate and a kind of backlight module that uses this light guide plate.
Background technology
Light guide plate in backlight module generally comprises exiting surface and the bottom surface relative with exiting surface, is formed with site microstructure on bottom surface, and site microstructure is used for changing the direction of propagation that propagates into the light on it, thereby light is penetrated from exiting surface.Yet, site microstructure by light to all directions scattering, thereby make light from exiting surface penetrates, also can propagate to different directions, thereby make in backlight module, also need to use the brightness enhancement film with prism structure, it is for the positive view directions to vertical exiting surface by the light guiding of penetrating from exiting surface.Thereby this backlight module comprises more parts, be unfavorable for the miniaturization of backlight module.
Summary of the invention
In view of this, be necessary to provide a kind of light guide plate that can effectively overcome the problems referred to above.
In view of this, be also necessary to provide a kind of backlight module that can effectively overcome the problems referred to above.
A light guide plate, comprises incidence surface, exiting surface, the bottom surface opposing with this exiting surface, the first side that is connected respectively this exiting surface and this bottom surface, the second side, and this incidence surface connects respectively this exiting surface, this bottom surface and this first side and this second side.On this bottom surface, be provided with anti-loose microstructure, this anti-loose microstructure is to be the V-type groove that concentric circles is arranged, and the cross section along this concentrically ringed radial direction of this V-type groove is isosceles triangle, and the drift angle of this isosceles triangle is 80 °.
A kind of backlight module, comprise light guide plate and light source, this light guide plate comprises incidence surface, exiting surface, the bottom surface opposing with this exiting surface, the first side that is connected respectively this exiting surface and this bottom surface, the second side, and this incidence surface connects respectively this exiting surface, this bottom surface and this first side and this second side.On this bottom surface, be provided with anti-loose microstructure, this anti-loose microstructure is to be the V-type groove that concentric circles is arranged, and the cross section along this concentrically ringed radial direction of this V-type groove is isosceles triangle, and the drift angle of this isosceles triangle is 80 °.This surface of light source arranges to this incidence surface.
With respect to prior art, the present invention on bottom surface, is provided with the V-type groove of concentric circles and the vertex angle theta of V-type groove is set to 80 °, for light is guided in to the positive view directions perpendicular to exiting surface, thereby can omit the brightness enhancement film to positive visual angle by light guiding, be conducive to the miniaturization of backlight module.
Accompanying drawing explanation
Fig. 1 is the structural representation of the backlight module of embodiment of the present invention, and this backlight module comprises a light guide plate.
Fig. 2 is the stereographic map of the light guide plate in Fig. 1, and wherein the relative Fig. 1 of light guide plate is inverted.
Fig. 3 is the side view of the light guide plate in Fig. 2.
Fig. 4 is the surface of intensity distribution of different angles of the exiting surface of the light guide plate in Fig. 2.
Main element symbol description
| Backlight module | 100 |
| Light guide plate | 20 |
| Exiting surface | 21 |
| Bottom surface | 23 |
| The first side | 25 |
| The second side | 26 |
| The 3rd side | 27 |
| The 4th side | 28 |
| Incidence surface | 29 |
| Reflection microstructure, V-type groove | 230 |
Following embodiment further illustrates the present invention in connection with above-mentioned accompanying drawing.
Embodiment
Refer to Fig. 1 to Fig. 3, the backlight module 100 of the present invention's one preferred implementation, comprises a light guide plate 20 and a light source 30.In the present embodiment, this light source 30 is LED, and the angle of divergence of this light source 30 is ± 90 °.
This light guide plate 20 is with transparent resin material, and for example polymethylmethacrylate (PMMA) is made, and the refractive index of this light guide plate 20 is 1.5.This light guide plate 20 is roughly square tabular, comprises exiting surface 21, bottom surface 23 relative with exiting surface 21, connects respectively the first side 25, the second side 26, the 3rd side 27 and the 4th side 28 of exiting surface 21 and bottom surface 23.Wherein, the first side 25 and the second side 26 are located adjacent one another, and toward each other, the second side 26 and the 4th side 28 are toward each other for the first side 25 and the 3rd side 27.In the present embodiment, the angle between the first side 25 and the second side 26 is 90 °, and in other embodiments, it can be also other angle.
This light guide plate 20 also comprises that one connects respectively the incidence surface 29 of this exiting surface 21, bottom surface 23, the first side 25, the second side 26.This incidence surface 29 one end close to each other with the second side 26 in the first side 25 is connected with the second side 26 with this first side 25.This light source 30 arranges towards this incidence surface 29.This incidence surface 29 extends to the length that length these the second side 26 directions equals or be slightly larger than this light source 30 from this first side 25.
On bottom surface 23, be provided with reflection microstructure 230, to change the direction of propagation of light, light penetrated along the direction perpendicular to exiting surface 21 from exiting surface 21.The V-type groove that reflection microstructure 230 is arranged for being concentric circles, this V-type groove 230 is covered with whole bottom surface 23, and this concentrically ringed center of circle is on the first side 25 and the crossing intersection L in the second side 26, that is the position at these light source 30 places.The isosceles triangle that is shaped as along concentrically ringed diametric cross section of this V-type groove 230, this isosceles triangle has the vertex angle theta away from bottom surface 23.
Because light is to penetrate along take the radial direction that light source 30 is the center of circle, therefore the direction of propagation of light in light guide plate 20 is vertical with the concentrically ringed tangential direction (X-direction) that V-type groove 230 forms, thereby, after light is by 230 reflections of V-type groove, light can not dispersed in X-direction, that is to say that the light after reflection is inevitable along the direction propagation vertical with X-direction.
When the angle of the vertex angle theta of this isosceles triangle is different, light by 230 reflections of V-type groove after, the situation of the dispersing difference of the concentrically ringed radial direction (Y direction) forming at V-type groove 230.Vertex angle theta is got to different angles and test respectively, please refer to Fig. 4, when θ=80 °, light concentrates on along the direction vertical with Y direction, and the halfwidth in the angle of divergence of Y direction is about ± and 3 °, thus the light after reflection is propagated along the direction vertical with Y direction substantially.
The present invention is set to concentric circles by V-type groove 230, makes by the light after 230 reflections of V-type groove along propagating perpendicular to concentrically ringed tangential direction; And the vertex angle theta of V-type groove 230 is set to 80 °, make light after reflection along propagating perpendicular to concentrically ringed radial direction; Thereby the bootable light of this V-type groove 230 concentrates on the positive view directions perpendicular to exiting surface 21, make this backlight module 100 can omit the brightness enhancement film to positive visual angle by light guiding.
In a word; those skilled in the art will be appreciated that; above embodiment is only for the present invention is described; and be not used as limitation of the invention; as long as within connotation scope of the present invention, within the appropriate change that above embodiment is done and variation all drop on the scope of protection of present invention.
Claims (8)
1. a light guide plate, comprise incidence surface, exiting surface, the bottom surface opposing with this exiting surface, the first side that is connected respectively this exiting surface and this bottom surface, the second side, this incidence surface connects respectively this exiting surface, this bottom surface and this first side and this second side, it is characterized in that: on this bottom surface, be provided with anti-loose microstructure, this anti-loose microstructure is to be the V-type groove that concentric circles is arranged, the cross section along this concentrically ringed radial direction of this V-type groove is isosceles triangle, and the drift angle of this isosceles triangle is 80 °.
2. light guide plate as claimed in claim 1, is characterized in that: the angle between this first side and this second side is 90 °.
3. light guide plate as claimed in claim 2, is characterized in that: this concentrically ringed center of circle is positioned on the intersection of this first side and this second side.
4. a backlight module, it comprises light guide plate and light source, this light guide plate comprises incidence surface, exiting surface, the bottom surface opposing with this exiting surface, the first side that is connected respectively this exiting surface and this bottom surface, the second side, this incidence surface connects respectively this exiting surface, this bottom surface and this first side and this second side, and this surface of light source arranges to this incidence surface; It is characterized in that: on this bottom surface, be provided with anti-loose microstructure, this anti-loose microstructure is to be the V-type groove that concentric circles is arranged, and the cross section along this concentrically ringed radial direction of this V-type groove is isosceles triangle, and the drift angle of this isosceles triangle is 80 °.
5. backlight module as claimed in claim 4, is characterized in that: the angle between this first side and this second side is 90 °.
6. backlight module as claimed in claim 4, is characterized in that: this concentrically ringed center of circle is positioned on the intersection of this first side and this second side.
7. backlight module as claimed in claim 4, is characterized in that: the quantity of this light source is one.
8. backlight module as claimed in claim 4, is characterized in that: this light source is LED.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310133288.5A CN104111490A (en) | 2013-04-17 | 2013-04-17 | Light-guiding plate and backlight module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310133288.5A CN104111490A (en) | 2013-04-17 | 2013-04-17 | Light-guiding plate and backlight module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104111490A true CN104111490A (en) | 2014-10-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310133288.5A Pending CN104111490A (en) | 2013-04-17 | 2013-04-17 | Light-guiding plate and backlight module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104111490A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106068420A (en) * | 2015-02-20 | 2016-11-02 | 大日本印刷株式会社 | Light guide plate, planar light source device, transmission display unit |
-
2013
- 2013-04-17 CN CN201310133288.5A patent/CN104111490A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106068420A (en) * | 2015-02-20 | 2016-11-02 | 大日本印刷株式会社 | Light guide plate, planar light source device, transmission display unit |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20141022 |