CN1873491A - Light guiding plate, and backlight module set of using the plate - Google Patents
Light guiding plate, and backlight module set of using the plate Download PDFInfo
- Publication number
- CN1873491A CN1873491A CN 200510035087 CN200510035087A CN1873491A CN 1873491 A CN1873491 A CN 1873491A CN 200510035087 CN200510035087 CN 200510035087 CN 200510035087 A CN200510035087 A CN 200510035087A CN 1873491 A CN1873491 A CN 1873491A
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- China
- Prior art keywords
- light
- guide plate
- light guide
- emitting face
- diffusion particle
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Abstract
The invention supplies a light guiding board and the backlight module using the board. It includes a light resource, a reflecting board, a light guiding board and a condense sheet. The light resource is set at one side of the light guide board. The light guide board includes a light emitting surface, a light emergent face and a bottom face. The emergent face has light diffused structure.
Description
[technical field]
The invention relates to a kind of light guide plate and adopt the module backlight of this light guide plate, particularly about a kind of module backlight that is used for the light guide plate of LCD and adopts this light guide plate.
[background technology]
Because the liquid crystal itself in the panel of LCD is not luminous, thereby, for reaching display effect, a planar light source device is provided must for the LCD panel, as module backlight, to realize Presentation Function.
A kind of module backlight of prior art as shown in Figure 1, this module 1 backlight comprises light source 11, reflector plate 12, light guide plate 13, diffusion sheet 14 and concentration piece 15.This light source 11 places light guide plate 13 1 sides, and this reflector plate 12, light guide plate 13, diffusion sheet 14 and concentration piece 15 are placed successively.Wherein, the light composition surface of advancing of the bright dipping composition surface of this light guide plate 13 and diffusion sheet 14 is made directly closely surface heat and is melt into shape and is combined as a whole.
In the manufacture process, after this light guide plate 13 is made in advance and is finished, be installed in the nib of a bed die, and closed mold, form a die cavity between the bright dipping composition surface 131 of light guide plate 13 and this mold, in this die cavity, last die sinking obtains light guide plate 13 and diffusion sheet 14 is closely as one with the material ejection formation of diffusion sheet 14.
The line source that light source 11 is produced enters light guide plate 13, and change into after the uniform surface light source from 131 outgoing of bright dipping composition surface, enter diffusion sheet 14 by entering light composition surface 141 again, diffusion sheet 14 is with the further scattering diffusion of light, improve outgoing light homogeneity, last concentration piece 15 will be reflected through the light after diffusion sheet 14 diffusions, the light that disperses is concentrated in the certain angle scope shine liquid crystal panel, thereby improve brightness of illumination.
But this light guide plate 13 and diffusion sheet are closely as one, and this both combination thickness is bigger.
[summary of the invention]
Be the light guide plate that overcomes prior art and the bigger problem of combination thickness of diffusion sheet, be necessary to provide a kind of light guide plate of thinner thickness with light diffusion function.
For overcoming the thicker problem of module thickness backlight of prior art, be necessary to provide a kind of module backlight of thinner thickness.
The disclosed technical scheme that solves this technical problem of one better embodiment is: a kind of light guide plate is provided, and it comprises a light entrance face, a light-emitting face and one and the bottom surface that is oppositely arranged of this light-emitting face, and this light-emitting face has optical scattering structure.
The disclosed technical scheme that solves this technical problem of another better embodiment is: a kind of module backlight is provided, it comprises a light source, a reflector plate, a light guide plate and a concentration piece, this light source places light guide plate one side, this reflector plate, light guide plate and concentration piece are placed successively, this light guide plate comprises a light-emitting face, and this light-emitting face has optical scattering structure.
Wherein this optical scattering structure is directly to be coated with a diffusion particle layer or to do the wavy surface that formation is handled in embossing at light-emitting face at light-emitting face.
Compared to prior art, because the light-emitting face of this light guide plate has optical scattering structure, this optical scattering structure is directly to be coated with a diffusion particle layer or to do the wavy surface that formation is handled in embossing at light-emitting face at light-emitting face, be closely as one compared to light guide plate and diffusion sheet, reduce its thickness.Adopt the module backlight of this light guide plate can reduce the application of diffusion sheet, thereby reduce the thickness and the cost of module backlight.
[description of drawings]
Fig. 1 is the sectional view of a kind of prior art module backlight.
Fig. 2 is the sectional view of light guide plate first embodiment of the present invention.
Fig. 3 is the sectional view of light guide plate second embodiment of the present invention.
Fig. 4 is the sectional view of the present invention's module backlight.
[embodiment]
Seeing also Fig. 2, is the sectional view of light guide plate first embodiment of the present invention.This light guide plate 20 comprises a light entrance face 21, a light-emitting face 22 and one and the bottom surface 23 that is oppositely arranged of this light-emitting face 22.
The light-emitting face 22 of this light guide plate 20 forms a diffusion particle layer 24, and these diffusion particle layer 24 inside have diffusion particle 241, by the size of adjustment diffusion particle 241 and the diffusion of controllable density system light.
Light enters this light guide plate 20 through light entrance face 21, and light is converted to after the uniform surface light source from light-emitting face 22 outgoing, and diffusion particle layer 24 further with its scattering diffusion, improves outgoing light homogeneity.
The material of this light guide plate 20 be polymethylmethacrylate (PolymethylMethacrylate, PMMA).Diffusion particle layer 24 is made up of macromolecular compound 242 and diffusion particle 241.The material of diffusion particle 241 can be the material that is same as macromolecular compound 242, also can be the material that is different from macromolecular compound 242, as glass etc.
Make in the process of this light guide plate 20, can process diffusion particle 241 earlier, then the diffusion particle 241 that processes is blended in the macromolecular compound 242, pass through proper method again, as spraying method, roller coating method or stencil printing etc., be coated on the light-emitting face 22 of light guide plate 20, when this macromolecular compound solidifies, finish the diffusion particle layer 242 of fixing this diffusion particle 241; Also can earlier macromolecular compound 242 be coated on the light-emitting face 22 of light guide plate 20, waiting it to solidify the back adopts methods such as two-tube laser, oxysome chemical reaction, outside surface directly destroy, ultrasonic radiation at macromolecular compound 242 inner processing diffusion particles 241, can can improve light utilization efficiency this moment according to the distribution of the required control diffusion particle 241 of actual design.But the shape of scattered beams such as that this diffusion particle 241 can be processed into is hemispherical, spherical, taper or inverted pyramid type.
Seeing also Fig. 3, is the sectional view of light guide plate second embodiment of the present invention.The light guide plate 20 that is different from first embodiment, this optical scattering structure 34 are directly to do embossing at the light-emitting face 32 of light guide plate 30 to handle, and making this light-emitting face 32 is a wavy surface.Utilize abrasive material and grindstone to grind this light-emitting face 32, to form this optical scattering structure 34; Also can select to utilize strong acid or this light-emitting face 32 of highly basic material etch process etching, form optical scattering structure 34.
See also Fig. 4, it is a kind of sectional view that adopts the module backlight of light guide plate shown in Figure 2, this module 4 backlight comprises a light source 41, a reflector plate 42, a light guide plate 20 and a concentration piece 43, wherein, this light source 41 places light entrance face 21 1 sides of light guide plate 20, and this reflector plate 42, light guide plate 20 and concentration piece 43 are placed successively.
The light that light source 41 sends enters this light guide plate 20 through light entrance face 21, light penetrates from light-emitting face 22 after changing into uniform surface light source, part light also penetrates through the light-emitting face 22 of light guide plate 20 through more than 42 reflection of reflector plate, diffusion particle layer 24 is further with all emergent ray scattering diffusions, improve outgoing light homogeneity, finally light is reflected, the light that disperses is concentrated in the certain angle scope shine liquid crystal panel, thereby improve brightness of illumination by concentration piece 43.
Claims (10)
1. light guide plate, it comprises that a guiding light enters the light entrance face of light guide plate, a light is penetrated the light-emitting face, one and the bottom surface that is oppositely arranged of light-emitting face of light guide plate, it is characterized in that: this light-emitting face has optical scattering structure.
2. light guide plate as claimed in claim 1 is characterized in that: this optical scattering structure is the diffusion particle layer.
3. light guide plate as claimed in claim 2 is characterized in that: this diffusion particle layer is made up of macromolecular compound and diffusion particle.
4. light guide plate as claimed in claim 3 is characterized in that: the shape of this diffusion particle is hemispherical, spherical, taper or inverted pyramid type.
5. light guide plate as claimed in claim 1 is characterized in that: this optical scattering structure is to do embossing at light-emitting face to handle the wavy surface that forms.
6. light guide plate as claimed in claim 1 is characterized in that: the material of this light guide plate is a polymethylmethacrylate.
7. module backlight, it comprises that one places the light guide plate of this light source one side in order to the light source, that emits beam, this light guide plate comprises a light-emitting face, it is characterized in that: this light-emitting face has optical scattering structure.
8. module backlight as claimed in claim 7 is characterized in that: this optical scattering structure is the diffusion particle layer.
9. module backlight as claimed in claim 8 is characterized in that: this diffusion particle layer is made up of macromolecular compound and diffusion particle.
10. module backlight as claimed in claim 7 is characterized in that: this optical scattering structure is to do embossing at light-emitting face to handle the wavy surface that forms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510035087 CN1873491A (en) | 2005-06-01 | 2005-06-01 | Light guiding plate, and backlight module set of using the plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510035087 CN1873491A (en) | 2005-06-01 | 2005-06-01 | Light guiding plate, and backlight module set of using the plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1873491A true CN1873491A (en) | 2006-12-06 |
Family
ID=37484004
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510035087 Pending CN1873491A (en) | 2005-06-01 | 2005-06-01 | Light guiding plate, and backlight module set of using the plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1873491A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102928901A (en) * | 2012-10-19 | 2013-02-13 | 宁波激智新材料科技有限公司 | Optical diffusion barrier and preparation method thereof, and liquid crystal display device |
| CN103163585A (en) * | 2011-12-08 | 2013-06-19 | 鸿富锦精密工业（深圳）有限公司 | Compound type light guiding module and manufacturing method thereof |
| CN103389538A (en) * | 2012-05-11 | 2013-11-13 | 鸿富锦精密工业（深圳）有限公司 | Light guide plate and manufacturing method thereof |
-
2005
- 2005-06-01 CN CN 200510035087 patent/CN1873491A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103163585A (en) * | 2011-12-08 | 2013-06-19 | 鸿富锦精密工业（深圳）有限公司 | Compound type light guiding module and manufacturing method thereof |
| CN103389538A (en) * | 2012-05-11 | 2013-11-13 | 鸿富锦精密工业（深圳）有限公司 | Light guide plate and manufacturing method thereof |
| CN102928901A (en) * | 2012-10-19 | 2013-02-13 | 宁波激智新材料科技有限公司 | Optical diffusion barrier and preparation method thereof, and liquid crystal display device |
| CN102928901B (en) * | 2012-10-19 | 2014-10-29 | 宁波激智科技股份有限公司 | Optical diffusion barrier and preparation method thereof, and liquid crystal display device |
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Open date: 20061206 |