CN100370326C - Back light assembly - Google Patents
Back light assembly Download PDFInfo
- Publication number
- CN100370326C CN100370326C CNB031400841A CN03140084A CN100370326C CN 100370326 C CN100370326 C CN 100370326C CN B031400841 A CNB031400841 A CN B031400841A CN 03140084 A CN03140084 A CN 03140084A CN 100370326 C CN100370326 C CN 100370326C
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- CN
- China
- Prior art keywords
- light
- plate
- guide plate
- light guide
- module backlight
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Planar Illumination Modules (AREA)
- Light Guides In General And Applications Therefor (AREA)
Abstract
The present invention relates to a backlight module group which comprises a light guiding plate, at least a light source and a reflecting plate, wherein the light guiding plate comprises at least a light incidence surface, a light reflecting surface connected with the light incident surface and a light emergent surface which is opposite to the light reflecting surface; the light source is positioned at the side of he light incident surface of the light guiding plate, and the reflecting plate is positioned at the side of the light reflecting surface of the light guiding plate; the reflecting plate comprises a base plate and a reflecting layer which is arranged at one side of the base plate, which is adjacent to the light reflecting surface; a plurality of hemispheric convexities are distributed on the reflecting layer.
Description
[technical field]
The invention relates to a kind of module backlight, be meant a kind of module backlight that is used for liquid crystal indicator especially.
[background technology]
Because the liquid crystal itself in the display panels does not have the characteristics of luminescence, for reaching display effect, needing provides a module backlight to display panels, its function is to provide the area source that brightness is abundant and be evenly distributed to display panels, its operation principles is: light enters light guide plate after light source penetrates, export via the scattering unit reflection of light guide plate light reflection surface and by the light-emitting face of light guide plate, the enhancing effect that cooperates diffuser plate and prismatic lens provides brightness abundant and uniform surface light source.
Seeing also Fig. 1, is a kind of sectional view of module backlight of prior art.This module 1 backlight mainly is made up of light source 11, light guide plate 12, reflecting plate 13, time diffuser plate 14, last diffuser plate 16 and prism plate 15.Light from light source 11 ejaculations, incide down the diffuser plate 14 after its exit facet 123 outgoing through light guide plate 12, simultaneously, from be reflected plate 13 reflections and returning the light guide plate 12 of the light of reflecting surface 122 outgoing of light guide plate 12, and then diffuser plate 14 converts equally distributed area source under its exit facet 123 outgoing and quilt, is transmitted on the liquid crystal panel by prism plate 15 and last diffuser plate 16 more at last.Reflecting plate 13 is the critical elements of module 1 backlight, its role is to reflect the light from reflecting surface 122 outgoing of light guide plate 12.
Please consulting Fig. 2 together, is the sectional view of the reflecting plate 13 in the above-mentioned module backlight 1.This reflecting plate 13 is plate shaped, comprises that a substrate 132 and is positioned at the reflection horizon 133 in this substrate 132.This reflection horizon 133 generally forms by apply highly reflective material in substrate 132.
Usually, reflecting plate all plays the effect of reflection from the light of light guide plate effusion, reaches the purpose that strengthens module luminosity backlight, thereby but it can not well spread light the uniformity coefficient and the LCD visual angle of increase light from the light guide plate outgoing.For light outgoing uniformity coefficient and the LCD visual angle that increases module backlight, also need on light guide plate, to increase two-layer diffuser plate and promptly go up diffuser plate and following diffuser plate, therefore, back light module unit structure complexity, and cost height.
[summary of the invention]
In order to overcome prior art back light module unit structure complexity, and the high problem of cost, the invention provides a kind of simple in structure, and the low module backlight of cost.
The technical scheme that technical solution problem of the present invention is adopted is: a module backlight is provided, and it comprises a light guide plate, at least one light source and a reflecting plate.This light guide plate comprises at least one light entrance face, a light reflection surface and a light-emitting face relative with this light reflection surface that links to each other with this light entrance face, and this light source is positioned at light guide plate light entrance face one side, and this reflecting plate is positioned at light guide plate light reflection surface one side.This reflecting plate comprises a substrate and a reflection horizon, this reflection horizon is arranged on a side of contiguous light guide plate light reflection surface on the substrate, be distributed with a plurality of hemispherical protuberances on this reflection horizon, the distribution density of these a plurality of hemispherical protuberances is that one side direction opposite side increases setting gradually or increases gradually in the middle of two side direction from the reflection horizon along the reflection horizon.
Than prior art, advantage of the present invention is: because the hemispherical protuberances on the reflecting plate can play the effect of scattered beam, thereby save the following diffuser plate in the module backlight, therefore, make entire aphototropism mould simple in structure, and cost is low.
[description of drawings]
Fig. 1 is the sectional view of prior art module backlight.
Fig. 2 is the sectional view of reflecting plate among Fig. 1.
Fig. 3 is the sectional view of the present invention's module backlight.
Fig. 4 is the schematic perspective view of reflecting plate among Fig. 3.
Fig. 5 is that the reflecting plate in the present invention's module backlight cooperates the effect of light synoptic diagram with light guide plate.
[embodiment]
Seeing also Fig. 3, is the sectional view of the present invention's module backlight, and this module 2 backlight comprises a light guide plate 22, a light source 21, a reflecting plate 23, a prism plate 24 and a diffuser plate 25.This light guide plate 22 comprises a light entrance face 221 that is positioned at its side, a light reflection surface 222 that links to each other with this light entrance face 221 and a light-emitting face 223 relative with this light reflection surface 222.Light source 21 is arranged on contiguous these light entrance face 221 1 sides.This reflecting plate 23 is arranged on light reflection surface 222 1 sides of contiguous light guide plate 22.This prism plate 24 is positioned at light guide plate 22 light-emitting faces 223 1 sides.This diffuser plate 25 is positioned at exiting surface 241 1 sides of prism plate 24.This light guide plate 22 is the flat board of acryl (PMMA) material.This light guide plate 22 also can be wedge type, and its light reflection surface 222 is smooth plane.This reflecting plate 23 comprises that a substrate 232 and is positioned at the reflection horizon 233 on the substrate 232, and these reflection horizon 233 surface distributed have a plurality of hemispherical protuberances 231.
See also Fig. 4, the material of this reflecting plate 23 is a silver (Ag), and also useable glass replaces.Reflection horizon 233 is PET (Polyethylene Terephthalate, a polyethylene terephthalate).233 surfaces utilize the blasting treatment technology to make a plurality of hemispherical protuberances 231 in the reflection horizon.Differing in size of this hemispherical protuberances 231, and be evenly distributed on the reflection horizon 233 of reflecting plate 23.The size of the hemispherical protuberances 231 of reflecting plate 23 of the present invention, density also can be with increasing with light source (figure do not show) distance, or the increases gradually in the middle of 233 liang of side direction from the reflection horizon of the size of this hemispherical protuberances 231, density.
Seeing also Fig. 5, is that the reflecting plate 23 in the present invention's module backlight cooperates with light guide plate 22 light 3 effect synoptic diagram.Hemispherical protuberances 231 is close to the light reflection surface 222 of light guide plate 22, and light 3 enters light guide plate 22 and propagates, and incides the hemispherical protuberances a plurality of scattered beams of 231 surface formation (indicating) and enters light guide plate 22, and penetrate from the light-emitting face 223 of light guide plate 22.Differing in size of hemispherical protuberances 231, its diameter circle is between 1 μ m to 3 μ m.Light bright dipping after its scattering is more even.Because reflecting plate 23 costs are lower, on the reflection horizon 233 of reflecting plate 23, utilize sandblast technology to make diffusion that this type of is not of uniform size, the hemispherical protuberances of variable density 231 can play following diffuser plate and the function that increases the LCD visual angle, thereby reduce the assembly element of module backlight, reduce cost.
Claims (6)
1. module backlight, it comprises a light guide plate, an at least one light source and a reflecting plate, this light guide plate comprises at least one light entrance face, one light reflection surface and a light-emitting face relative that links to each other with this light entrance face with this light reflection surface, this light source is positioned at light guide plate light entrance face one side, this reflecting plate is positioned at light guide plate light reflection surface one side, this reflecting plate comprises a substrate and a reflection horizon, this reflection horizon is arranged on a side of contiguous light guide plate light reflection surface on the substrate, it is characterized in that: be distributed with a plurality of hemispherical protuberances on this reflection horizon, the distribution density of these a plurality of hemispherical protuberances is that one side direction opposite side increases setting gradually or increases gradually in the middle of two side direction from the reflection horizon along the reflection horizon.
2. module backlight as claimed in claim 1 is characterized in that: these a plurality of hemispherical protuberances diameters be 1 μ m to 3 μ m between.
3. module backlight as claimed in claim 1 is characterized in that: this substrate is silver or glass.
4. module backlight as claimed in claim 1 is characterized in that: this reflection horizon is the PET material.
5. module backlight as claimed in claim 1 is characterized in that: this module backlight comprises that further one is positioned at the diffuser plate of light guide plate light-emitting face one side.
6. module backlight as claimed in claim 5 is characterized in that: this module backlight comprises that further one is positioned at the prism plate of diffuser plate back to light guide plate one side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031400841A CN100370326C (en) | 2003-08-03 | 2003-08-03 | Back light assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031400841A CN100370326C (en) | 2003-08-03 | 2003-08-03 | Back light assembly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1580890A CN1580890A (en) | 2005-02-16 |
| CN100370326C true CN100370326C (en) | 2008-02-20 |
Family
ID=34579227
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031400841A Expired - Fee Related CN100370326C (en) | 2003-08-03 | 2003-08-03 | Back light assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100370326C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106168691A (en) * | 2016-09-27 | 2016-11-30 | 信利半导体有限公司 | A kind of reflector plate, backlight and liquid crystal display module |
| CN108873129A (en) * | 2018-06-25 | 2018-11-23 | 深圳市华星光电技术有限公司 | Reflector plate, side entrance back module and liquid crystal display |
| CN109212828A (en) * | 2018-09-30 | 2019-01-15 | 东莞市托普莱斯光电技术有限公司 | A kind of LCD TV backlight mould group that can improve light utilization |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0311502A (en) * | 1989-06-08 | 1991-01-18 | Fujitsu Ltd | Lighting device |
| CN1204775A (en) * | 1997-07-08 | 1999-01-13 | 夏普株式会社 | Backlight device |
| US20010013911A1 (en) * | 1999-12-29 | 2001-08-16 | Sung-Kon Kim | Back light device and liquid crystal display device having the same |
| US6480307B1 (en) * | 1919-07-02 | 2002-11-12 | Keun-Chang Yang | Plane light source unit and method for manufacturing holographic light-guide used for the same |
| CN1401088A (en) * | 2000-12-14 | 2003-03-05 | 三井化学株式会社 | Reflector sidelight type backlighting apparatus and reflector substrate |
| CN1409161A (en) * | 2001-09-19 | 2003-04-09 | 惠和株式会社 | Reflective thin sheet and back light assembly using said sheet |
| US20030123248A1 (en) * | 2001-12-29 | 2003-07-03 | Lg.Philips Lcd Co., Ltd. | Backlight device and method of fabricating the same |
| CN1501144A (en) * | 2002-11-13 | 2004-06-02 | 三星电子株式会社 | Reflector for back lighting assembly and the back lighting assembly using the same |
-
2003
- 2003-08-03 CN CNB031400841A patent/CN100370326C/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6480307B1 (en) * | 1919-07-02 | 2002-11-12 | Keun-Chang Yang | Plane light source unit and method for manufacturing holographic light-guide used for the same |
| JPH0311502A (en) * | 1989-06-08 | 1991-01-18 | Fujitsu Ltd | Lighting device |
| CN1204775A (en) * | 1997-07-08 | 1999-01-13 | 夏普株式会社 | Backlight device |
| US20010013911A1 (en) * | 1999-12-29 | 2001-08-16 | Sung-Kon Kim | Back light device and liquid crystal display device having the same |
| CN1401088A (en) * | 2000-12-14 | 2003-03-05 | 三井化学株式会社 | Reflector sidelight type backlighting apparatus and reflector substrate |
| CN1409161A (en) * | 2001-09-19 | 2003-04-09 | 惠和株式会社 | Reflective thin sheet and back light assembly using said sheet |
| US20030123248A1 (en) * | 2001-12-29 | 2003-07-03 | Lg.Philips Lcd Co., Ltd. | Backlight device and method of fabricating the same |
| CN1501144A (en) * | 2002-11-13 | 2004-06-02 | 三星电子株式会社 | Reflector for back lighting assembly and the back lighting assembly using the same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1580890A (en) | 2005-02-16 |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080220 Termination date: 20160803 |
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| CF01 | Termination of patent right due to non-payment of annual fee |