CN102537763A - Backlight module and liquid crystal display - Google Patents
Backlight module and liquid crystal display Download PDFInfo
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- CN102537763A CN102537763A CN2010106069144A CN201010606914A CN102537763A CN 102537763 A CN102537763 A CN 102537763A CN 2010106069144 A CN2010106069144 A CN 2010106069144A CN 201010606914 A CN201010606914 A CN 201010606914A CN 102537763 A CN102537763 A CN 102537763A
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- Prior art keywords
- module backlight
- dielectric layer
- coating
- lgp
- light
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- 239000004973 liquid crystal related substance Substances 0.000 title abstract description 5
- 239000011248 coating agent Substances 0.000 claims description 27
- 238000000576 coating method Methods 0.000 claims description 27
- 239000005083 Zinc sulfide Substances 0.000 claims description 12
- FVRNDBHWWSPNOM-UHFFFAOYSA-L strontium fluoride Chemical compound [F-].[F-].[Sr+2] FVRNDBHWWSPNOM-UHFFFAOYSA-L 0.000 claims description 8
- 229910001637 strontium fluoride Inorganic materials 0.000 claims description 8
- DRDVZXDWVBGGMH-UHFFFAOYSA-N zinc;sulfide Chemical compound [S-2].[Zn+2] DRDVZXDWVBGGMH-UHFFFAOYSA-N 0.000 claims description 6
- 238000009792 diffusion process Methods 0.000 claims description 5
- ORUIBWPALBXDOA-UHFFFAOYSA-L magnesium fluoride Chemical compound [F-].[F-].[Mg+2] ORUIBWPALBXDOA-UHFFFAOYSA-L 0.000 claims description 3
- 238000003475 lamination Methods 0.000 claims description 2
- 239000010410 layer Substances 0.000 claims 21
- 239000002356 single layer Substances 0.000 claims 5
- 229910001635 magnesium fluoride Inorganic materials 0.000 claims 2
- 238000002310 reflectometry Methods 0.000 abstract description 7
- 238000007747 plating Methods 0.000 description 2
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 2
- 239000004926 polymethyl methacrylate Substances 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 238000000149 argon plasma sintering Methods 0.000 description 1
- 238000005282 brightening Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000003989 dielectric material Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012788 optical film Substances 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
The invention is suitable for the field of liquid crystal displays, and provides a backlight module. The backlight module comprises a light source and a light guide plate, wherein a high-reflectivity medium film is arranged on the side surface of the light guide plate having no incident light. According to the invention, the high-reflectivity medium film arranged on the side surface of the guide plate of the backlight module can reflect light beams emitted to the side surface of the light guide plate to inside of the light guide plate by a high reflectivity up to 99.999%, thereby effectively solving the light leakage problem of the light guide plate and improving light intensity of the backlight module. Accordingly, the backlight module can provide high-brightness backlight for a display panel.
Description
Technical field
The invention belongs to the demonstration field, relate in particular to a kind of module backlight and LCD.
Background technology
Present all kinds of LCD mainly adopts the combining structure of liquid crystal panel and module backlight.Module backlight mainly provides the even brightness area source, and liquid crystal panel is modulated the function that shows to realize to light.The light source of existing module backlight is generally LED spot light or CCFL line source.Light direction along light source is provided with LGP, also is provided with diffusion sheet, brightening piece usually, and each element is through a frame fixation, and it is whole to form module backlight.Penetrate through the side of LGP for fear of light; Usually mount reflector plate in the side of LGP, or the plating reflectance coating, the reflectivity of reflector plate is about 98%; And under hot and humid environment, come off easily; The reflectivity of common reflectance coating only about 95%, can not effectively be avoided light leak, inevitably light loss caused module backlight to go out luminous intensity lower.
Summary of the invention
The object of the present invention is to provide a kind of module backlight, be intended to solve existing module backlight and go out the low problem of luminous intensity.
The present invention is achieved in that a kind of module backlight, comprises light source and LGP, and the side of said LGP dull thread incident is provided with the high reflectance deielectric-coating.
Another object of the present invention is to provide a kind of LCD, comprise module backlight and display floater, it is evenly backlight that said module backlight is that display floater provides, and said module backlight is above-mentioned module backlight.
The present invention is provided with the high reflectance deielectric-coating in the LGP side of existing module backlight; Can the light of directive LGP side is inner with the high reflectance reflected back LGP up to 99.999%; And then effectively solved the light leak problem of LGP; Improved the luminous intensity that of module backlight, can the backlight of high brightness more be provided for display floater.
Description of drawings
Fig. 1 is the structural representation of the module backlight that provides of first embodiment of the invention.
The specific embodiment
In order to make the object of the invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with accompanying drawing and embodiment.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
The embodiment of the invention provides a kind of module backlight, and this module comprises light source and LGP, and the side of LGP is provided with the high reflectance deielectric-coating.
The embodiment of the invention is provided with the high reflectance deielectric-coating in the LGP side of existing module backlight; Can the light of directive LGP side is inner with 99.9% high reflectance reflected back LGP; And then effectively solved the light leak problem of LGP; Improved the luminous intensity that of module backlight, can the backlight of high brightness more be provided for display floater.
Another purpose of the embodiment of the invention is to provide a kind of LCD, comprises module backlight and display floater, and it is evenly backlight that module backlight is that display floater provides, and this module backlight is above-mentioned module backlight.
Below in conjunction with specific embodiment concrete realization of the present invention is described in detail:
Embodiment one:
Fig. 1 shows the structural representation of the module backlight that first embodiment of the invention provides, and for the ease of explanation, only shows the part relevant with present embodiment.
This module backlight comprises light source 1, on the light direction of light source 1, is provided with LGP 2.On the light direction of LGP 2, can also blast sheet 3 and diffusion sheet 4 be set lamination; The height diffuse reflection takes place through LGP 2 in the light that light source 1 sends; Exiting surface at LGP 2 has formed uniform area light source; The emergent light of LGP 2 becomes more even through behind the blast sheet of top 3 and the diffusion sheet 4, and brightness is higher, for display floater provides evenly backlight.When LGP 2 have concurrently all light and blast do the time spent also can omit blast sheet and diffusion sheet.Present embodiment does not have the side of light incident to be provided with high reflectance deielectric-coating 21 for the light that makes light source 1 and send can make full use of at LGP.This high reflectance deielectric-coating 21 is to be the basis with multilayer optical film vector light scattering theory; The dielectric material of high and low refractive index alternately is plated in the multilayer high reflection mirror that obtains on the LGP dielectric substrate; Its reflectivity can reach 97% to 99.999%; The concrete principle of reflection of high reflectance deielectric-coating is known in this field, repeats no more.The high reflectance deielectric-coating is set in the side of LGP can significantly reduces spilling of light, reduce light losing, and then improve the luminous intensity that of module backlight, the risk of can avoid tradition to attach reflector plate simultaneously intrinsic come off warpage with respect to the plating reflectance coating.
In embodiments of the present invention, for side-light type module backlight (like Fig. 1), light source 1 is positioned at the side of LGP 2; One reflecting plate 5 can be set below LGP 2; When light penetrated through the bottom of LGP 2, reflecting plate 5 was with light reflected back LGP 2 once more, to avoid the light waste.For the module backlight of this side-light type, high reflectance deielectric-coating 21 mainly is arranged on the side that LGP is not provided with light source 1.
In the present embodiment, reflecting plate 5 can adopt polymethyl methacrylate (acrylic, PMMA) material is processed.
Embodiment two:
In embodiments of the present invention, high reflectance deielectric-coating 21 can be magnesium fluoride (MgF
2) and the high reflectance deielectric-coating that alternately constitutes of zinc sulphide (ZnS) dielectric layer, it has MgF
2-ZnS-MgF
2-ZnS-......MgF
2The laminated construction of-ZnS.Wherein, every layer of MgF
2With the thickness of ZnS medium can all be 0.25 μ m, this high reflectance deielectric-coating can have 16～20 layers, specifically can be 18 layers.
Embodiment three:
In embodiments of the present invention, high reflectance deielectric-coating 21 can be by zinc sulphide (ZnS) and strontium fluoride (SrF
2) dielectric layer alternately constitutes, its structure is specially ZnS-SrF
2-ZnS-ZnS-SrF
2-ZnS-ZnS-SrF
2-...-ZnS-ZnS-SrF
2-ZnS.Wherein, the thickness of every layer of ZnS medium is 0.125 μ m, every layer of SrF
2The thickness of medium is 0.25 μ m, and this high reflectance deielectric-coating can have 28～34 layers, specifically can be 30 layers.
Embodiment four:
In embodiments of the present invention, high reflectance deielectric-coating 21 can be by zinc sulphide (ZnS) and strontium fluoride (SrF
2) dielectric layer alternately constitutes, its structure is specially SrF
2-ZnS-SrF
2-SrF
2-ZnS-SrF
2-SrF
2-ZnS-......-SrF
2-SrF
2-ZnS-SrF
2Wherein, the thickness of every layer of ZnS medium is 0.25 μ m, every layer of SrF
2The thickness of medium is 0.125 μ m, and this high reflectance deielectric-coating can have 28～34 layers, specifically can be 30 layers.
The embodiment of the invention is provided with the high reflectance deielectric-coating in the LGP side of existing module backlight; Can the light of directive LGP side is inner with the reflectivity reflected back LGP up to 99.999%; And then effectively solved the light leak problem of LGP; Improved the luminous intensity that of module backlight, can the backlight of high brightness more be provided for display floater.This module backlight can be used as the backlight liquid crystal display module, for it provides the backlight of even high brightness.
The above is merely preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of within spirit of the present invention and principle, being done, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a module backlight comprises light source and LGP, it is characterized in that, the side of said LGP dull thread incident is provided with the high reflectance deielectric-coating.
2. module backlight as claimed in claim 1 is characterized in that, goes back lamination on the light direction of said LGP and is provided with blast sheet and diffusion sheet.
3. module backlight as claimed in claim 1 is characterized in that, said high reflectance deielectric-coating is made up of magnesium fluoride dielectric layer and zinc sulphide dielectric layer alternative stacked.
4. module backlight as claimed in claim 3 is characterized in that, the thickness of individual layer magnesium fluoride dielectric layer and monolayer ZnS dielectric layer is 0.25 μ m.
5. module backlight as claimed in claim 1 is characterized in that, said high reflectance deielectric-coating is made up of zinc sulphide dielectric layer and strontium fluoride dielectric layer alternative stacked.
6. module backlight as claimed in claim 5; It is characterized in that; The both ends of the surface of said high reflectance deielectric-coating are respectively the monolayer ZnS dielectric layer, and the deielectric-coating between the said both ends of the surface is made up of individual layer strontium fluoride dielectric layer and double-deck zinc sulphide dielectric layer alternative stacked.
7. module backlight as claimed in claim 6 is characterized in that, the thickness of monolayer ZnS dielectric layer is 0.125 μ m, and the thickness of individual layer strontium fluoride dielectric layer is 0.25 μ m.
8. module backlight as claimed in claim 5; It is characterized in that; The both ends of the surface of said high reflectance deielectric-coating are respectively individual layer strontium fluoride dielectric layer, and the deielectric-coating between the said both ends of the surface is made up of monolayer ZnS dielectric layer and double-deck strontium fluoride dielectric layer alternative stacked.
9. module backlight as claimed in claim 8 is characterized in that, the thickness of monolayer ZnS dielectric layer is 0.25 μ m, and the thickness of individual layer strontium fluoride dielectric layer is 0.125 μ m.
10. a LCD comprises module backlight and display floater, and it is evenly backlight that said module backlight is that display floater provides, and it is characterized in that said module backlight is each described module backlight of claim 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010106069144A CN102537763A (en) | 2010-12-27 | 2010-12-27 | Backlight module and liquid crystal display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010106069144A CN102537763A (en) | 2010-12-27 | 2010-12-27 | Backlight module and liquid crystal display |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102537763A true CN102537763A (en) | 2012-07-04 |
Family
ID=46345356
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010106069144A Pending CN102537763A (en) | 2010-12-27 | 2010-12-27 | Backlight module and liquid crystal display |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102537763A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108954053A (en) * | 2017-05-22 | 2018-12-07 | 南昌欧菲显示科技有限公司 | Backlight module, display device and terminal |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2458641Y (en) * | 2000-12-15 | 2001-11-07 | 浙江大学 | Electric site selection liquid crystal light valve with medium mirror and nm-class composite film light barrier |
| US20040246743A1 (en) * | 2001-06-30 | 2004-12-09 | Lee Moon-Gyu | Backlight using planar hologram for flat display device |
| CN1641413A (en) * | 2004-01-16 | 2005-07-20 | 汉欣企业有限公司 | One-dimensional photonic crystal and its light-emitting device |
| JP2007010955A (en) * | 2005-06-30 | 2007-01-18 | Casio Comput Co Ltd | Liquid crystal display |
| EP1936429A2 (en) * | 1998-07-28 | 2008-06-25 | Nippon Telegraph and Telephone Corporation | Optical device and display apparatus |
| CN201555153U (en) * | 2009-12-01 | 2010-08-18 | 深圳帝光电子有限公司 | Uniform high-brightness side-light type backlight source |
-
2010
- 2010-12-27 CN CN2010106069144A patent/CN102537763A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1936429A2 (en) * | 1998-07-28 | 2008-06-25 | Nippon Telegraph and Telephone Corporation | Optical device and display apparatus |
| CN2458641Y (en) * | 2000-12-15 | 2001-11-07 | 浙江大学 | Electric site selection liquid crystal light valve with medium mirror and nm-class composite film light barrier |
| US20040246743A1 (en) * | 2001-06-30 | 2004-12-09 | Lee Moon-Gyu | Backlight using planar hologram for flat display device |
| CN1641413A (en) * | 2004-01-16 | 2005-07-20 | 汉欣企业有限公司 | One-dimensional photonic crystal and its light-emitting device |
| JP2007010955A (en) * | 2005-06-30 | 2007-01-18 | Casio Comput Co Ltd | Liquid crystal display |
| CN201555153U (en) * | 2009-12-01 | 2010-08-18 | 深圳帝光电子有限公司 | Uniform high-brightness side-light type backlight source |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108954053A (en) * | 2017-05-22 | 2018-12-07 | 南昌欧菲显示科技有限公司 | Backlight module, display device and terminal |
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Application publication date: 20120704 |