CN103244875A - Display backlight structure with nano metal grating - Google Patents
Display backlight structure with nano metal grating Download PDFInfo
- Publication number
- CN103244875A CN103244875A CN2013102094386A CN201310209438A CN103244875A CN 103244875 A CN103244875 A CN 103244875A CN 2013102094386 A CN2013102094386 A CN 2013102094386A CN 201310209438 A CN201310209438 A CN 201310209438A CN 103244875 A CN103244875 A CN 103244875A
- Authority
- CN
- China
- Prior art keywords
- nano metal
- grating
- diffusion sheet
- face
- demonstration
- 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.)
- Granted
Links
Images
Abstract
The invention discloses a display backlight structure with a nano metal grating, which comprises a light source, a lamp tube reflection cover, a reflection sheet, a light guide plate, a diffusion sheet, and the nano metal wire grating arranged between the diffusion sheet and a polaroid on the bottom layer of a liquid crystal panel, wherein the nano metal grating consists of a grating face, a baseplate and a substrate face; the baseplate is located between the grating face and the substrate face; the grating face is over against the diffusion sheet; and the substrate face faces towards the polaroid. The display backlight structure has higher optical efficiency than the ordinary structure of which the substrate face is close to backlight, and can solve the problem in a visual angle of viewing the liquid crystal panel, and the reflection backlight can be recycled with the adoption of the nano metal grating, so that display luminance can be improved greatly, and the energy can be saved.
Description
Technical field
The present invention relates to the information display technology field, specifically relate to a kind of backing structure that contains the nano metal wiregrating and improve screen display brightness.
Background technology
In the FPD field, LCD occupies the share more than 80%, and LCD panel itself is not had a characteristics of luminescence, and therefore, the light source that must provide by module backlight and the brightness that is evenly distributed just can make the LCD show image.Therefore bright enhancement film, LGP, diffusion barrier etc. are also referred to as module key component backlight, and it mainly acts on is to provide uniform area source for liquid crystal panel, and high as far as possible luminous energy sees through characteristic, do not influence the characteristic of light as far as possible.The structure of the module backlight of common LCD as shown in Figure 1, from backlight to output light effective light output efficiency very low, the display brightness of screen is lower.
At present at above problem, improving screen display brightness method mainly contains: (1) adds brightness enhancement film in module backlight, wherein common with Minnesota Mining and Manufacturing Company's production reflecting type polarizing brightness enhancement film (or being called the DBEF film) especially, this film is the optical thin film with generation high efficiency polarised light function that is composited by the layer high molecule material; Specifically can be referring to relevant researcher and the Taiwan one tame photoelectricity business tie-up of introducing (2) U.S. of http://www.3M.com/vikuiti, with the linear polarization element among the nanometer grating polarizer replacement LCD, produced thinner, display device more efficiently.DBEF is a kind of reflective polarizers in the first method, by the light of selective reflecting back light system, it is not absorbed by the following polaroid of LCD, and the part light at the full visual angle of LCD is re-used, simultaneously can recycling polarised light.Make axial brightness increase about 60% thus.But owing to the low light that causes revealing of polarization rejection ratio is absorbed, poor effect had only the luminous energy about 30% to improve when existing DBEF film was used for the LCD demonstration as the polarisation egative film.Second kind is adopted the nanometer grating polarizer to replace reflecting polarizer and bottom linear polarization layer, by advancing a circulating element backlight with the function of these two polarizers is integrated, thereby improves display brightness.But in this method, do not mention the putting position problem of nanometer wiregrating, and this exactly has very big influence for the raising of display brightness.
Summary of the invention
The objective of the invention is at above-mentioned the deficiencies in the prior art, a kind of demonstration backing structure with nano metal grating is provided, improve the effective light output efficiency from light source to output light.
Technical solution of the present invention is as follows:
A kind of demonstration backing structure with nano metal grating, comprise light source, fluorescent tube reflector, reflector plate, LGP, diffusion sheet, its characteristics are also to comprise the nano metal wiregrating between the polarizer that is arranged at diffusion sheet and liquid crystal panel bottom, this nano metal wiregrating is made of grating face, substrate and substrate surface, described substrate is between grating face and substrate surface, the grating face is over against diffusion sheet, and substrate surface is towards polaroid.
Described nano metal wiregrating is arranged on over against the direction of angle of emergence maximum behind diffusion sheet.
Described substrate is to the plastics of optical transparency or glass.
Described light source is cold cathode fluorescent tube (CCFL) or light emitting diode (LED).
Described fluorescent tube reflector acts on and encases the light source that fluorescent tube sends, and that tries one's best sends in the LGP.
Described LGP is that line source is converted to area source, is used for improving the uniformity of gray scale and panel light, does not refer in particular to a certain class LGP.Can be that tabular also can be wedge shape, the mode of printing of site can be IR or UV printing.
Described reflector plate is that the light source reflection that will not be scattered enters in the light conducting region again, and the reflection mode is the minute surface reflection, to improve the utilization rate of light.
A lot of granular objects are arranged in the described diffusion sheet, and the light that LGP can be received spreads, and light can be propagated to nano metal wiregrating frontal, plays the effect of widening the visual angle.
Described nano metal wiregrating has grating on the one side of diffusion sheet, and is coated with metal in the above, and does not have grating towards a side of polarizer.
Described substrate is transparent plastic or glass.
Be coated with metal on the grating face of described nano metal wiregrating, described metal is Al or Ag, and the restriction that do not fix of its thickness.The metal that uses in the present embodiment is Al, and its thickness is 50nm.
Described grating face is lines or the microcavity nested configuration with defective, is single-layer metal wiregrating or double-level-metal wiregrating, the restriction that its cycle does not fix.The grating that uses in the present embodiment is that the double-level-metal wiregrating cycle is 300nm, and the degree of depth of wiregrating is 80nm.
It is on the length direction of common LGP that described nano metal wiregrating is placed in over against the direction through angle of emergence maximum behind the diffusion sheet.Can avoid owing to incident light by optical grating diffraction or form the absorption that the resonance of horizontal light wave causes and increase, make brightness and color change with the visual angle.
Particularly point out the placement location of nano metal wiregrating in said structure: its grating face is over against diffusion sheet, non-grating face is then towards polarizer, and the nano metal wiregrating is placed in over against the direction of angle of emergence maximum behind diffusion sheet, makes elder generation backlight pass through the mode that wiregrating comes out from substrate transmission again.Its principle is to reduce incident light and is scattered and is coupled to substrate formation absorption loss, can under the identical situation of transmission, obtain bigger reflection efficiency, reach than the close optical efficiency of more increasing backlight of general substrate surface, therefore can improve brightness and the energy savings of demonstration greatly.The present invention also points out through LGP line source to be converted into area source when led light source simultaneously, when the light of LGP being received by diffusion sheet spread and widens the visual angle again, being placed in the nano metal wiregrating over against the direction through angle of emergence maximum behind the diffusion sheet was on the length direction of common LGP.Thereby can avoid since incident light by optical grating diffraction or form the resonance of horizontal light wave and increase and absorb, cause brightness and color to change with the visual angle, as list of references: ZhichengYe, JunZheng, ShuSun, Shujing Chen and Dahe Liu, Plasmonics., 2012. DOI 10.1007/s11468-012-9433-6.
Compared with prior art, the invention has the beneficial effects as follows the effective light output efficiency that has improved from light source to output light, it is recycling to realize reflecting energy backlight, can further improve display brightness on original basis, and can guarantee the visual angle problem when watching liquid crystal panel.Simultaneously, the use of nano metal wiregrating mean the reflection backlight can be recycling, thereby can improve brightness and the energy savings of demonstration greatly.
Description of drawings
Fig. 1 is the structural representation of traditional backlight module and liquid crystal panel in the prior art.
Fig. 2 has the demonstration of nano metal grating with the structural representation of embodiment backlight for the present invention.
Fig. 3 has a nano metal grating for the present invention demonstration is with backlight after the nano metal wiregrating is inverted, and is used for doing the structural representation of the embodiment of checking.
Fig. 4 is two kinds of embodiment output light intensity contrasts under the situation of same intensity backlight among the present invention.
Fig. 5 for incident light among the present invention when changing perpendicular to the grating line orientations, the light transmittance figure that draws.
The light transmittance figure that Fig. 6 draws when nano metal wiregrating line orientations changes for incident light among the present invention.
Among the figure: 1-substrate, 2-grating face, 3-substrate surface, 4-diffusion sheet, 5-LGP, 6-reflector plate, 7-fluorescent tube reflector, 8-light source, 9-bottom polarizer, 10-liquid crystal layer, 11-colored filter, 12-top layer polarizer, 13-outermost reflector, 14-brightness enhancement film.
The specific embodiment
Below in conjunction with embodiment and accompanying drawing the present invention is elaborated, but should not limit protection scope of the present invention with this.
Please consult Fig. 2 earlier, Fig. 2 has a nano metal grating for the present invention demonstration is with first kind of embodiment backlight.As shown in the figure, after light emitting diode 8 (LED) is lighted, linear light sources enters LGP 5 through reflector 7, the transition lines distribution of light sources becomes uniform area source, the light of LGP 5 being collected through diffusion sheet 4 spreads again, the whole substrate 1 that contains the nano metal wiregrating is placed between the polarizer 9 of diffusion sheet and bottom, wherein nano metal wiregrating grating face 2 is over against diffusion sheet, 3 in non-grating face is towards bottom polarizer 9, and the nano metal wiregrating is placed in over against the direction of angle of emergence maximum behind diffusion sheet 4.Wherein, bottom polarizer 9, liquid crystal layer 10, colored filter 11, top layer polarizer 12, outermost reflector 13 constitute liquid crystal panel.
Fig. 3 has a nano metal grating for the present invention demonstration is with the embodiment after the nano metal wiregrating is inverted backlight, also be and Fig. 2 in embodiment bring and contrast, to prove a kind of embodiment of the superiority that the present invention was had.As shown in the figure, to work as after light emitting diode (LED) lights, linear light sources enters LGP through reflector, the transition lines distribution of light sources becomes uniform area source, the light of LGP being collected through diffusion sheet spreads again, and the whole substrate 1 that contains the nano metal wiregrating is placed between the polarizer of diffusion sheet and bottom.This substrate 1 is substrate surface 3 near the one side of diffusion sheet, and the one side towards the bottom polarizer in this substrate 1 is grating face 2.
Fig. 4 is two kinds of embodiment output light intensity contrasts under the situation of same intensity light source among the present invention, as shown in the figure, what the black line was represented among the figure is that the grating face is namely used the measured next spectrum line of spectrometer over against backlight under first kind of embodiment, and what grey lines was represented among the figure is that substrate surface is namely used the measured next spectrum line of spectrometer over against backlight under second kind of embodiment.The wavelength of the light wave of abscissa representative wherein, unit is nanometer.Ordinate then represents final output light intensity.The described embodiment of Fig. 2 can obtain under the identical situation of transmission than the described embodiment of Fig. 3 optics utilization ratio more efficiently as seen from Figure 4.This can reduce incident light mainly due to grating facing to the light source placement and be scattered and be coupled to substrate formation absorption loss, therefore under the identical situation of transmission, can obtain bigger reflection efficiency, can improve the optics utilization ratio whereby.So preferred grating face is over against backlight.
Fig. 5 and Fig. 6 are the resolution chart that the transmitted spectrum of nano metal wiregrating among the present invention moves towards with incident light and grating lines, and abscissa is wavelength, and unit is nanometer, and ordinate is projection ratio, and unit is %.The light transmittance figure that draws when changing perpendicular to the grating line orientations for incident angle of Fig. 5 wherein.Fig. 6 is the light transmittance figure of incident light when changing along nano metal wiregrating line orientations.Thereby can discovery clearly can generation horizontal light wave resonance clearly make the color of transmitted spectrum change in the modes of emplacement of Fig. 6 by Fig. 5 and 6 contrasts, efficiency of transmission reduces simultaneously.Therefore the preferential grating line orientations of nano metal grating of selecting is consistent with the maximum dispersal direction through the LGP emergent light.
Claims (7)
1. demonstration backing structure with nano metal grating, comprise light source (8), fluorescent tube reflector (7), reflector plate (6), LGP (5), diffusion sheet (4), it is characterized in that also comprising the nano metal wiregrating between the polarizer that is arranged at diffusion sheet and liquid crystal panel bottom, this nano metal wiregrating is made of grating face (2), substrate (1) and substrate surface (3), described substrate (1) is positioned between grating face (2) and the substrate surface (3), grating face (2) is over against diffusion sheet, and substrate surface (3) is towards polaroid.
2. the demonstration backing structure with nano metal grating according to claim 1 is characterized in that, described nano metal wiregrating is arranged on over against the direction of angle of emergence maximum behind diffusion sheet.
3. the demonstration backing structure with nano metal grating according to claim 1 is characterized in that, is coated with metal on the grating face (2) of described nano metal wiregrating.
4. the demonstration backing structure with nano metal grating according to claim 3 is characterized in that, described metal is Al or Ag.
5. the demonstration backing structure with nano metal grating according to claim 1 is characterized in that, described substrate (1) is plastics or the glass to optical transparency.
6. the demonstration backing structure with nano metal grating according to claim 1 is characterized in that, described grating face (2) is lines or the microcavity nested configuration with defective.
7. the demonstration backing structure with nano metal grating according to claim 6 is characterized in that, described grating face (2) is single-layer metal wiregrating or double-level-metal wiregrating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310209438.6A CN103244875B (en) | 2013-05-30 | 2013-05-30 | Display backlight structure with nano metal grating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310209438.6A CN103244875B (en) | 2013-05-30 | 2013-05-30 | Display backlight structure with nano metal grating |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103244875A true CN103244875A (en) | 2013-08-14 |
| CN103244875B CN103244875B (en) | 2015-05-27 |
Family
ID=48924598
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310209438.6A Active CN103244875B (en) | 2013-05-30 | 2013-05-30 | Display backlight structure with nano metal grating |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103244875B (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105572959A (en) * | 2016-03-01 | 2016-05-11 | 京东方科技集团股份有限公司 | Liquid crystal display panel and display device |
| CN105700226A (en) * | 2016-04-25 | 2016-06-22 | 京东方科技集团股份有限公司 | Viewing angle control mechanism, light guide plate, backlight module, array substrate and display panel |
| JP2017111349A (en) * | 2015-12-17 | 2017-06-22 | 大日本印刷株式会社 | Video source unit and display device |
| CN107436513A (en) * | 2016-05-26 | 2017-12-05 | 三星显示有限公司 | Display device and its manufacture method |
| US9939676B2 (en) | 2015-01-05 | 2018-04-10 | Boe Technology Group Co., Ltd. | Display substrate and manufacturing method thereof, display apparatus |
| CN108152877A (en) * | 2017-12-29 | 2018-06-12 | 深圳市华星光电技术有限公司 | Wire grating polaroid and preparation method thereof, liquid crystal display |
| CN109375419A (en) * | 2018-10-29 | 2019-02-22 | 京东方科技集团股份有限公司 | Backlight module and display device |
| CN110441854A (en) * | 2015-05-29 | 2019-11-12 | 富士胶片株式会社 | Back light unit |
| CN111708212A (en) * | 2020-06-23 | 2020-09-25 | 武汉华星光电技术有限公司 | Display panel and display device |
| CN112379550A (en) * | 2020-11-13 | 2021-02-19 | 昆山龙腾光电股份有限公司 | Display panel, driving method and display device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1989431A (en) * | 2004-07-23 | 2007-06-27 | 日立化成工业株式会社 | Diffraction type condensing film and surface light source device using same |
| KR20090025795A (en) * | 2007-09-07 | 2009-03-11 | 미래나노텍(주) | A light sheet unit including nano wire grid and backlight assembly employing the same |
| CN101437980A (en) * | 2004-11-30 | 2009-05-20 | 阿古拉科技公司 | Applications and fabrication techniques for large scale wire grid polarizers |
| CN101946205A (en) * | 2008-02-13 | 2011-01-12 | 夏普株式会社 | Illumination device and liquid crystal display device |
| JP2011248284A (en) * | 2010-05-31 | 2011-12-08 | Sony Chemical & Information Device Corp | Polarizing plate and method of manufacturing the same |
-
2013
- 2013-05-30 CN CN201310209438.6A patent/CN103244875B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1989431A (en) * | 2004-07-23 | 2007-06-27 | 日立化成工业株式会社 | Diffraction type condensing film and surface light source device using same |
| CN101437980A (en) * | 2004-11-30 | 2009-05-20 | 阿古拉科技公司 | Applications and fabrication techniques for large scale wire grid polarizers |
| KR20090025795A (en) * | 2007-09-07 | 2009-03-11 | 미래나노텍(주) | A light sheet unit including nano wire grid and backlight assembly employing the same |
| CN101946205A (en) * | 2008-02-13 | 2011-01-12 | 夏普株式会社 | Illumination device and liquid crystal display device |
| JP2011248284A (en) * | 2010-05-31 | 2011-12-08 | Sony Chemical & Information Device Corp | Polarizing plate and method of manufacturing the same |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9939676B2 (en) | 2015-01-05 | 2018-04-10 | Boe Technology Group Co., Ltd. | Display substrate and manufacturing method thereof, display apparatus |
| CN110441854B (en) * | 2015-05-29 | 2021-12-21 | 富士胶片株式会社 | Backlight unit |
| CN110441854A (en) * | 2015-05-29 | 2019-11-12 | 富士胶片株式会社 | Back light unit |
| JP2017111349A (en) * | 2015-12-17 | 2017-06-22 | 大日本印刷株式会社 | Video source unit and display device |
| CN105572959A (en) * | 2016-03-01 | 2016-05-11 | 京东方科技集团股份有限公司 | Liquid crystal display panel and display device |
| US10222648B2 (en) | 2016-03-01 | 2019-03-05 | Boe Technology Group Co., Ltd. | Liquid crystal display panel and display device |
| CN105700226A (en) * | 2016-04-25 | 2016-06-22 | 京东方科技集团股份有限公司 | Viewing angle control mechanism, light guide plate, backlight module, array substrate and display panel |
| CN107436513A (en) * | 2016-05-26 | 2017-12-05 | 三星显示有限公司 | Display device and its manufacture method |
| CN108152877A (en) * | 2017-12-29 | 2018-06-12 | 深圳市华星光电技术有限公司 | Wire grating polaroid and preparation method thereof, liquid crystal display |
| CN109375419A (en) * | 2018-10-29 | 2019-02-22 | 京东方科技集团股份有限公司 | Backlight module and display device |
| CN111708212A (en) * | 2020-06-23 | 2020-09-25 | 武汉华星光电技术有限公司 | Display panel and display device |
| CN112379550A (en) * | 2020-11-13 | 2021-02-19 | 昆山龙腾光电股份有限公司 | Display panel, driving method and display device |
| CN112379550B (en) * | 2020-11-13 | 2023-01-24 | 昆山龙腾光电股份有限公司 | Display panel, driving method and display device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103244875B (en) | 2015-05-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103244875B (en) | Display backlight structure with nano metal grating | |
| US9891460B2 (en) | Substrate for display, display panel and display device | |
| US20060098140A1 (en) | Liquid crystal display device and fabrication method thereof | |
| US10634948B2 (en) | Lighting device and display device | |
| US20120154712A1 (en) | Liquid crystal display device and backlight module thereof | |
| WO2014063391A1 (en) | Liquid crystal display module | |
| KR101777528B1 (en) | Backlight module and liquid crystal display device using same | |
| CN102207565B (en) | Multifunctional optical sheet, and backlight module and liquid crystal display device with optical sheet | |
| KR101740194B1 (en) | Display panel unit and display device | |
| CN101349778A (en) | Light conducting plate and backlight module | |
| KR101392063B1 (en) | Polarized light guide plate with wire grid polarizer and liquid crystal display panel | |
| US9989800B2 (en) | Polarizer and method of manufacturing the same and liquid crystal display device using the same | |
| CN204807877U (en) | Reflective liquid crystal display device | |
| KR101070686B1 (en) | Composite Sheet for LCD, and Backlight Unit Using The Same | |
| US20160252667A1 (en) | Backlight unit and display device | |
| CN115176197A (en) | Optical film, backlight module and display device | |
| WO2018176601A1 (en) | Transflective liquid crystal display apparatus | |
| CN202152985U (en) | Multifunctional optical plate and backlight module and LCD both employing same | |
| CN103672615A (en) | Backlight module for imaging projection system | |
| JP2011060455A (en) | Lighting unit, and display device | |
| US7784988B2 (en) | Diffusion plate and backlight module | |
| CN103162165A (en) | Direct type light-emitting diode (LED) backlight module provided with free-form surface lens | |
| CN212989861U (en) | LCD projector optical system | |
| CN101718410A (en) | Method for preparing LCD backlight | |
| US20080291538A1 (en) | Plasma reflective polarizer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |