CN100419527C - Back light assembly - Google Patents
Back light assembly Download PDFInfo
- Publication number
- CN100419527C CN100419527C CNB031401406A CN03140140A CN100419527C CN 100419527 C CN100419527 C CN 100419527C CN B031401406 A CNB031401406 A CN B031401406A CN 03140140 A CN03140140 A CN 03140140A CN 100419527 C CN100419527 C CN 100419527C
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- Prior art keywords
- light
- guide plate
- module backlight
- light guide
- light source
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Abstract
The present invention relates to a back light module. The present invention comprises at least one light source, a light guide plate and a frame, wherein the light guide plate comprises at least one light incident surface, a bottom surface which is adjacent to the light incident surface, and a light emergent surface which is opposite to the bottom surface, the light source is opposite to the light incident surface, the light guide plate and the light source are contained in the frame which is made of materials with high reflectivity, the frame comprises at least one bottom plate and a plurality of rims, and a surface of the bottom plate, which is adjacent to the bottom surface of the light guide plate, is provided with a plurality of scattering mesh points.
Description
[technical field]
The invention relates to a kind of module backlight, particularly about a kind of module backlight that is used for LCD.
[background technology]
LCD is a kind of non-self-emission display apparatus, it shows mainly passing through or the obstructed realization of coming by control light beam that external light source sends, therefore need external light source and corresponding guiding device, as module backlight, this module backlight can be with the even directed toward display panel of the light beam that external light source sent.
Module backlight mainly comprises light source, light source cover, light guide plate and other optical modules, and these assemblies need a framework to be fixed when assembling.
See also Fig. 1, for Chinese patent application discloses the module 1 a kind of backlight that is disclosed for CN1371018A number, this module 1 backlight comprises a light guide plate 21, a reflector plate 22, a light source cover 23, a light source 24 and a framework 25.This light guide plate 21 has two outstanding fixture blocks 211, and these two outstanding fixture block 211 relative light guide plate 21 are provided with.This light source cover 23 has two supporting members 231, has a pilot hole (not indicating) on this two supporting member 231 respectively.This framework 25 comprises the two location frames 251 that are provided with relatively, and these frame 251 inboards, two location are relatively set with location division 253, and this location division 253 is in order to receive the outstanding fixture block 211 of light guide plate 21.Relative position is offered a pilot hole (indicate) respectively on this two location frame 251, and screw 26 cooperates with the pilot hole of this location frame 251 after passing the pilot hole of supporting member 231, thereby light source cover 23 is fixed in framework 25.
This light guide plate 21 comprise a light entrance face 213, one with adjacent bottom surface 214 of this light entrance face 213 and a light-emitting face 212 relative with this bottom surface 214, handle through the site this bottom surface 214.Light source 24 relative these light entrance faces 213 are provided with, and this light source cover 23 can make projection light thereon reflect and enter light guide plate 21 via light entrance face 213, and then makes full use of the light that light source 24 is sent.
Again as shown in Figure 2, be the network point distribution synoptic diagram of light guide plate 21, bottom surface 214 has evenly distributed scattering netted dot 2141, and this scattering netted dot 2141 is spherical, and this scattering netted dot 2141 also can be that other shapes are arranged.
Reflecting plate 22 is arranged on bottom surface 214 1 sides of light guide plate 21, transmit through light guide plate 21 by 24 isolychns of light source, after the reflection of scattering netted dot 2141 scatterings of bottom surface 214 and reflecting plate 22, penetrate, thereby form the area source of the higher and good evenness of briliancy by light-emitting face 212.
The scattering netted dot 2141 of this module 1 backlight is arranged on the bottom surface of light guide plate 214, cost consider with production efficiency on, at present small-medium size has been given up screen painting and has been changed with etching method directly the scattering point design on mould, and directly the method with ejection formation obtains finished product.But in actual ejaculation process, because light guide plate penetrates condition and Mould Machining influences too sensitivity of end properties, process parameter will directly influence the performance of light guide plate, and the different ejaculation condition end properties of different moulds (identical scattering netted dot design) are all different.
This module backlight needs a reflecting plate, makes cost increase and the assembling complexity, also makes its processing procedure and structure all complicated, wayward because of bottom surface of light guide plate has the site, further increases the cost of module backlight.
[summary of the invention]
For overcoming the high and assembling complicated problems of existing module cost backlight, the invention provides a kind of cost module backlight lower, simple in structure.
The technical scheme that technical solution problem of the present invention is adopted is: a kind of module backlight is provided, it comprises at least one light source, one light guide plate and a framework, wherein, this light guide plate comprises at least one light entrance face, one bottom surface and with this a bottom surface relative light-emitting face adjacent with this light entrance face, this at least one light source is with respect to this at least one light entrance face setting, this framework comprises at least one base plate and a plurality of frame, this light guide plate and light source are contained in this framework, wherein this framework is the high reflectance material, it comprises at least one base plate and a plurality of frame, and only on a surface of contiguous this bottom surface of light guide plate of this chassis base a plurality of scattering netted dots is set in this chassis base and this bottom surface of light guide plate.
Compared to prior art, the framework of the present invention's module backlight is to be higher than 95% high reflectance material with reflectivity to make, and can omit reflecting plate, back light module unit structure is oversimplified, and then reduced cost.In addition, scattering netted dot places on the chassis base, makes that light conducting plate structure simplification and process parameter are more easy to control, and module cost backlight further reduces.
[description of drawings]
Fig. 1 is the three-dimensional exploded view of prior art module backlight.
Fig. 2 is the network point distribution synoptic diagram of light guide plate shown in first figure.
Fig. 3 is the three-dimensional exploded view of the present invention's module backlight.
Fig. 4 is that framework shown in the 3rd figure is along the schematic cross-section of A-A.
[embodiment]
Seeing also Fig. 3, is module backlight of the present invention, and this module 2 backlight comprises a light guide plate 10, a light source 40, a light source cover 30 and a framework 70, and this light guide plate 10, light source 40 are housed in this framework 70.
This light guide plate 10 is plate shaped, it comprise a light entrance face 103, one with adjacent bottom surface 104 of this light entrance face 103 and a light-emitting face 102 relative with this bottom surface 104.This light guide plate 10 has two outstanding fixture blocks 101, and these two outstanding fixture block 101 relative light guide plate 10 are provided with.The fluorescent tube that this light source 40 is adopted is CCFL (Cathode Fluorescence Lamp, cold cathode fluorescent lamp), it is these light entrance face 103 settings relatively, this light source cover 30 is arranged on the opposite side of the light source 40 relative light guide plate planes of incidence 103, this light source cover 30 has two supporting members 301, has a pilot hole (not indicating) on this two supporting member 301 respectively.
This framework 70 is one-body molded in the mode of ejection formation by highly reflective material (as Mitubishi HPR3000, GEBFL200 etc.), and it comprises two location frame 701, a rear wall frame 704 and base plates 702.This base plate 702 is handled through the site, the scattering netted dot 7021 with a plurality of regular distribution.As shown in Figure 4, this scattering netted dot 7021 is spherical grooves.This two location frame 701 is oppositely arranged, and the inboard is relatively set with location division 703, and this location division 703 is groove structures, outstanding fixture block 101 shapes, the sizableness of itself and light guide plate 10.These frame 701 ends, two location are respectively equipped with a pilot hole (indicating), and screw 60 cooperates with the pilot hole of this location frame 701 after passing the pilot hole of supporting member 301, thereby light source cover 30 is fixed on the framework 70.
When this module 2 backlight was worked, light source 40 sent linear light, and light source cover 30 can make projection light thereon reflect and enter light guide plate 10 via light entrance face 103, and then makes full use of the light that light source 40 is sent.104 light that penetrate arrive base plate 702 back parts and are entered light guide plate 10 after scattering netted dot 7021 scatterings on base plate 702 surfaces from the bottom surface, and remainder is entered light guide plate 10 by base plate 702 reflections.Be scattered and the light that returns of being reflected penetrates via light-emitting face 102, make the function that module 2 transition lines light sources backlight are area source be achieved.
Because the framework 70 of this module 2 backlight is to be higher than 95% high reflectance material with reflectivity to make, and can omit reflecting plate, module 2 backlight is simplified the structure, and then reduce cost.In addition, scattering netted dot 7021 is arranged on the chassis base 702, make light guide plate 10 simplify the structure and process parameter more easy to control, module 2 costs backlight further reduce.
The scattering netted dot of backlight module frame backplate surface of the present invention is not limited in spherical groove, also can be v-depression, sphere projection etc. other know shape in the industry, and the site also not only is confined to even distribution, its also can be gradually close, gradually dredge to distribute or with other existing known distribution forms such as random number distributions.
Also can place a diffuser plate and a blast sheet on the light guide plate light-emitting face of the present invention's module backlight in regular turn, to satisfy demand to high briliancy and homogeneity light source.This diffuser plate and blast sheet together were housed in the framework in when assembling and light guide plate.
The light guide plate of the present invention's module backlight also can be a wedge shape, and corresponding plate shaped light guide plate also can adopt two light sources, and the corresponding construction change all can prior art be reached.
The framework of the present invention's module backlight also can be a plastic frame, as long as its material has highly reflective, can prevent that leakage of light from getting final product.
The fluorescent tube that light source adopted also can be a plurality of light emitting diodes etc.
Claims (11)
1. module backlight, it comprises at least one light source, one light guide plate and a framework, wherein, this light guide plate comprises at least one light entrance face, one bottom surface and with this a bottom surface relative light-emitting face adjacent with this light entrance face, this at least one light source is with respect to this at least one light entrance face setting, this framework comprises at least one base plate and a plurality of frame, this light guide plate and at least one light source are housed in this framework, it is characterized in that: this framework is the high reflectance material, and only on a surface of contiguous this bottom surface of light guide plate of this chassis base a plurality of scattering netted dots is set in this chassis base and this bottom surface of light guide plate.
2. module backlight according to claim 1 is characterized in that: a surface of contiguous this bottom surface of light guide plate of this chassis base all disperses to be provided with a plurality of scattering netted dots.
3. module backlight according to claim 1 is characterized in that: this scattering netted dot is scattering projection or groove.
4. module backlight according to claim 1 is characterized in that: this light source is the CCFL fluorescent tube.
5. module backlight according to claim 1 is characterized in that: this light source is a plurality of light emitting diodes.
6. module backlight according to claim 1 is characterized in that: this module backlight further comprises a diffuser plate, and this diffuser plate is positioned at above the light guide plate.
7. module backlight according to claim 6 is characterized in that: this diffuser plate is contained in the framework.
8. module backlight according to claim 7 is characterized in that: this module backlight further comprises a blast sheet, and this blast sheet is positioned at this above diffuser plate.
9. module backlight according to claim 8 is characterized in that: this blast sheet is contained in this framework.
10. module backlight according to claim 4 is characterized in that: this module backlight further comprises a light source cover, and this light source cover is arranged on the opposite side of the relative light guide plate plane of incidence of light source.
11. module backlight according to claim 1 is characterized in that: the reflectivity of this high reflectance material is higher than 95%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031401406A CN100419527C (en) | 2003-08-09 | 2003-08-09 | Back light assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031401406A CN100419527C (en) | 2003-08-09 | 2003-08-09 | Back light assembly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1580898A CN1580898A (en) | 2005-02-16 |
| CN100419527C true CN100419527C (en) | 2008-09-17 |
Family
ID=34579256
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031401406A Expired - Fee Related CN100419527C (en) | 2003-08-09 | 2003-08-09 | Back light assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100419527C (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101749568B (en) * | 2008-12-01 | 2013-10-02 | 群康科技(深圳)有限公司 | Backlight module and manufacturing method thereof |
| CN102043189A (en) * | 2011-01-28 | 2011-05-04 | 苏州茂立光电科技有限公司 | Light guide plate and manufacturing method thereof |
| EP2713200B1 (en) | 2012-09-26 | 2015-10-28 | LG Display Co., Ltd. | Liquid crystal display device |
| CN103836448A (en) * | 2012-11-27 | 2014-06-04 | 群康科技(深圳)有限公司 | Backlight module and displayer comprising same |
| CN104165300A (en) * | 2013-05-17 | 2014-11-26 | 鸿富锦精密工业（深圳）有限公司 | Backlight module outer frame and backlight module |
| JP6689731B2 (en) * | 2016-11-28 | 2020-04-28 | 株式会社ジャパンディスプレイ | Backlight device and liquid crystal display device including the same |
| CN108873154A (en) * | 2018-08-10 | 2018-11-23 | 江苏达伦电子股份有限公司 | A kind of the network point distribution design method and light guide plate of light guide plate |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0792463A (en) * | 1993-09-20 | 1995-04-07 | Hitachi Ltd | Liquid crystal display |
| CN1184262A (en) * | 1996-12-06 | 1998-06-10 | 阿尔卑斯电气株式会社 | Liquid crystal display |
| JP2001006415A (en) * | 1999-06-24 | 2001-01-12 | Sanyo Electric Co Ltd | Backlight |
| JP2001118418A (en) * | 1999-10-19 | 2001-04-27 | West Electric Co Ltd | Lighting apparatus |
| JP2001210121A (en) * | 2000-01-27 | 2001-08-03 | Yuka Denshi Kk | Surface light source device and liquid crystal display using the same |
| JP2001345007A (en) * | 2000-05-31 | 2001-12-14 | Matsushita Electric Ind Co Ltd | Illumination device |
| CN1371018A (en) * | 2001-02-20 | 2002-09-25 | 达碁科技股份有限公司 | Frame for fixing light guide plate and backlight device thereof |
| CN1421728A (en) * | 2001-11-22 | 2003-06-04 | 胜华科技股份有限公司 | Optically variable light guide components |
| US6593980B2 (en) * | 2000-06-23 | 2003-07-15 | Samsung Electronics Co., Ltd. | Liquid crystal display device having a light guiding plate with a novel structure |
-
2003
- 2003-08-09 CN CNB031401406A patent/CN100419527C/en not_active Expired - Fee Related
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0792463A (en) * | 1993-09-20 | 1995-04-07 | Hitachi Ltd | Liquid crystal display |
| CN1184262A (en) * | 1996-12-06 | 1998-06-10 | 阿尔卑斯电气株式会社 | Liquid crystal display |
| JP2001006415A (en) * | 1999-06-24 | 2001-01-12 | Sanyo Electric Co Ltd | Backlight |
| JP2001118418A (en) * | 1999-10-19 | 2001-04-27 | West Electric Co Ltd | Lighting apparatus |
| JP2001210121A (en) * | 2000-01-27 | 2001-08-03 | Yuka Denshi Kk | Surface light source device and liquid crystal display using the same |
| JP2001345007A (en) * | 2000-05-31 | 2001-12-14 | Matsushita Electric Ind Co Ltd | Illumination device |
| US6593980B2 (en) * | 2000-06-23 | 2003-07-15 | Samsung Electronics Co., Ltd. | Liquid crystal display device having a light guiding plate with a novel structure |
| CN1371018A (en) * | 2001-02-20 | 2002-09-25 | 达碁科技股份有限公司 | Frame for fixing light guide plate and backlight device thereof |
| CN1421728A (en) * | 2001-11-22 | 2003-06-04 | 胜华科技股份有限公司 | Optically variable light guide components |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1580898A (en) | 2005-02-16 |
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| C14 | Grant of patent or utility model | ||
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Granted publication date: 20080917 Termination date: 20170809 |