CN100410751C - Liquid crystal display - Google Patents
Liquid crystal display Download PDFInfo
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- CN100410751C CN100410751C CNB031588611A CN03158861A CN100410751C CN 100410751 C CN100410751 C CN 100410751C CN B031588611 A CNB031588611 A CN B031588611A CN 03158861 A CN03158861 A CN 03158861A CN 100410751 C CN100410751 C CN 100410751C
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Abstract
The present invention relates to a liquid crystal display which comprises a light filter capable of absorbing light whose wavelength is from 480 to 500 nm and from 570 to 590 nm. The light filter is formed from a light filter piece, a dielectric layer formed in the mode of spattering and plating, a film or an assembly adding-absorbing pigment in the liquid crystal display. The present invention can filter light which uses wavelength of 480 to 500 nm, wavelength of 545 nm and wavelength of 570 to 590 nm as datum points of a color development range and has the wavelength of 480 to 500 nm and 570 to 590 nm, and can enhance light purity. The color development effect of the liquid crystal display can approach to the color development range of the three primary colors of light, and thus, the visible color range of the liquid crystal display device or a television display screen is increased.
Description
Technical field
The present invention relates to a kind of LCD, but and particularly relate to a kind of LCD of filtering apparatus of the light that includes an absorbing wavelength 480-500nm and 570-590nm.
Background technology
Because LCD (Liquid Crystal Display, LCD) have whole plane and frivolous build, institute take up space little, plate thickness thin, in light weight, add superiority such as but flat square shows, power consumption is low, low electromagenetic wave radiation, low heat radiation, (CathodeRay Tube, CRT) standard that becomes computing machine is equipped with to make it to replace gradually the conventional cathode ray tube display.
Please refer to Fig. 1, shown among the figure is the sectional view of conventional liquid crystal.In Fig. 1, LCD 100 mainly includes a display panels 110 and bottom-lighting type back light module (directbacklight module) 120.Backlight module 120 comprises one by prismatic lens (prism sheet) 111 and diffusion sheet (diffusing sheet) 112 multi-layer optical films of being formed, a reflector plate 115, a plurality of light source 114 and a lamp socket 116.Lamp socket 116 is in order to putting a plurality of light sources 114, and light source can be several cold-cathode tubes, in order to provide display panels 110 even and sufficient light, to show preferable image display quality.On lamp socket 116, dispose reflector plate 115, in order to reflection ray.Prismatic lens 111 and diffusion sheet 112 are to be disposed between backlight module 120 and the display panels 110, in order to will spread and be directed to display panels 110 equably from the light that backlight module 120 is dispersed.In addition, for general large scale liquid crystal display or tv display screen more than 20 o'clock, are agent structures that configuration one back up pad 113 is come forced fluid crystal display 100 in light source 114 tops, because display panel 110 oversize and diastrophic situations, and then influence display quality to avoid.
In 1931, (Intemational Commission on Illumination CIE) represented the Red Green Blue of color with the mark of [X], [Y], [Z], and draws XYZ chromaticity diagram with these three primary colors as the benchmark of color in international lighting association.And according to (the NationalTelevision System Committee of NTSC, NTSC) the relevant various specification of aspect the colourity of TV demonstration, working out, because the colour purity of LCD also can't reach the specification of CRT monitor fully at present, therefore LCD is generally all recently represented its quality to color representation with the percentage that reaches how many NTSC, with the NTSC number percent of at present general LCD, can reach about 70%~80% approximately.
Please refer to Fig. 2, shown among the figure is the XYZ chromaticity diagram of conventional liquid crystal.In Fig. 2, the RGB triangle area is the Atria summit of color range with ruddiness (R, wavelength 611nm), green glow (G, wavelength 545nm) and blue light (B, wavelength 430nm).Yet, because general display there is no the device of the light of filtering wavelength 480-500nm (near cyan) and 570-590nm (near yellow orange), so when the light time that has wavelength 480-500nm and 570-590nm, will be with wavelength 480-500nm, wavelength 545nm and wavelength 570-590nm new reference point as color range, excitation step-down after the colour mixture, smaller color makes the RGB triangle area dwindle, and the visible color scope of LCD or tv display screen is restricted.
Summary of the invention
Therefore, but the purpose of this invention is to provide a kind of LCD of filtering apparatus of the light that comprises absorbing wavelength 480-500nm and 570-590nm.This filtering apparatus for example is an optical filter, an or dielectric layer, one form of film, can filtering known with wavelength 480-500nm, wavelength 545nm and wavelength 570-590nm as two wavelength 480-500nm of color range reference point and the light of 570-590nm, the purity of light is improved, and the color developing effect of LCD can level off to the trichromatic color range of light, to increase the visible color scope of LCD or tv display screen.
According to purpose of the present invention, a kind of LCD is provided, comprise a glass substrate and a backlight module as display panel, wherein, backlight module comprises a plurality of light sources, a blooming, a filtering apparatus and a lamp socket.Blooming is to be positioned on the light source, and lamp socket is in order to the carrying light source.Blooming comprises prismatic lens and diffuser plate.In addition, large-sized LCD has a back up pad in addition, and this back up pad is positioned under the display panel, in order to support display panel.Filtering apparatus is to be positioned on the light source, and this filtering apparatus light of the about 480-500nm of absorbing wavelength (near cyan) and 570-590nm (near yellow orange) at least.Filtering apparatus can be formed on back up pad, prismatic lens, diffuser plate or the display panel.Following three examples of its formation method: example one, filtering apparatus are dielectric materials layers, are formed thereon with sputtering way.Example two, filtering apparatus are films, and be formed thereon in the pressing mode.Example three, by add one absorb pigment in back up pad, prismatic lens, diffuser plate or display panel to form this filtering apparatus.In addition, but filtering apparatus can be the optical filter of the light of an absorbing wavelength 480-500nm and 570-590nm, is on the arbitrary assembly that is disposed between glass substrate and the light source, and its collocation method is similar to the above-mentioned method that filtering apparatus is disposed on the back up pad.
For above-mentioned purpose of the present invention, feature and advantage can be become apparent, preferred embodiment cited below particularly, and do following detailed description in conjunction with the accompanying drawings.
Description of drawings
What Fig. 1 was shown is the sectional view of conventional liquid crystal.
What Fig. 2 was shown is the XYZ chromaticity diagram of conventional liquid crystal.
Fig. 3 A is shown is side view according to a LCD of the first embodiment of the present invention.
Fig. 3 B is shown is side view according to another LCD of the first embodiment of the present invention.
Fig. 3 C is shown is the side view of a LCD again according to the first embodiment of the present invention.
Fig. 3 D is shown is the side view of a LCD again according to the first embodiment of the present invention.
Fig. 4 A is shown is side view according to a LCD of the second embodiment of the present invention.
Fig. 4 B is shown is side view according to another LCD of the second embodiment of the present invention.
Fig. 4 C is shown is the side view of a LCD again according to the second embodiment of the present invention.
Fig. 4 D is shown is the side view of a LCD again according to the second embodiment of the present invention.
What Fig. 5 was shown is the XYZ chromaticity diagram of tradition and LCD of the present invention.
Description of reference numerals:
100,300,400: LCD;
110,310,410: display panel;
111,311,411: prismatic lens;
112,312,412: diffuser plate;
113,313,413: back up pad;
114,314,414: light source;
115,315,415: reflector plate;
116,316,416: lamp socket;
319A, 319B, 319C, 319D: filtering apparatus;
419: optical filter;
120,320A, 320B, 320C, 320D, 420: backlight module.
Embodiment
Include the LCD of filtering apparatus of the light of an absorbing wavelength 480-500nm and 570-590nm but the special design of the present invention is a kind of.This filtering apparatus for example is an optical filter, an or dielectric layer, the form of one film, can filtering known with wavelength 480-500nm, wavelength 545nm and wavelength 570-590nm as two wavelength 480-500nm of color range reference point and the light of 570-590nm, the purity of light is improved, and the color developing effect of LCD can level off to the trichromatic color range of light, to increase the visible color scope of LCD or tv display screen.
First embodiment
Please refer to Fig. 3 A, shown among the figure is side view according to a LCD of the first embodiment of the present invention.In Fig. 3 A, LCD 300 includes a glass substrate 310 and a bottom-lighting type back light module 320A as display panel at least.Backlight module 320A comprises blooming, a reflector plate 315, a plurality of light source 314 and the lamp socket 316 that a filtering apparatus 319A, is made up of prismatic lens 311 and diffusion sheet 312.In addition, for general large scale liquid crystal display or tv display screen more than 20 o'clock, are agent structures that configuration one back up pad 313 is come forced fluid crystal display 300 in light source 314 tops, because display panel 310 oversize and diastrophic situations, and then influence display quality to avoid.
Form following three examples of method of filtering apparatus 319A: example one, filtering apparatus 319A are a dielectric materials layer, are formed at sputtering way on the surface of back up pad 313.Example two, filtering apparatus 319A are a film, are formed in the pressing mode on the surface of back up pad 313.Example three, by add one absorb pigment in back up pad 313 to form filtering apparatus 319A.
Please refer to Fig. 3 B, shown among the figure is side view according to another LCD of the first embodiment of the present invention.Different is with Fig. 3 A, and backlight module 320B comprises blooming, a reflector plate 315, a plurality of light source 314 and the lamp socket 316 that a filtering apparatus 319B, is made up of prismatic lens 311 and diffusion sheet 312.Filtering apparatus 319B is positioned on the light source 314, and is formed on the surface of diffusion sheet 312, and filtering apparatus 319B is the light of the about 480-500nm of absorbing wavelength and 570-590nm at least.The method that forms filtering apparatus 319B is similar to three kinds of modes that the filtering apparatus 319A of Fig. 3 A is formed on the back up pad 313.Form following three examples of method of filtering apparatus 319B: example one, filtering apparatus 319B are a dielectric materials layer, are formed at sputtering way on the surface of diffusion sheet 312.Example two, filtering apparatus 319B are a film, are formed in the pressing mode on the surface of diffusion sheet 312.Example three, by add one absorb pigment in diffusion sheet 312 to form filtering apparatus 319B.
Please refer to Fig. 3 C, shown among the figure is the side view of a LCD again according to the first embodiment of the present invention.Different is with Fig. 3 A, and backlight module 320C comprises blooming, a reflector plate 315, a plurality of light source 314 and the lamp socket 316 that a filtering apparatus 319C, is made up of prismatic lens 311 and diffusion sheet 312.Filtering apparatus 319C is positioned on the light source 314, and is formed on the surface of prismatic lens 311, and filtering apparatus 319B is the light of the about 480-500nm of absorbing wavelength and 570-590nm at least.The method that forms filtering apparatus 319C is similar to three kinds of modes that the filtering apparatus 319A of Fig. 3 A is formed on the back up pad 313.Form following three examples of method of filtering apparatus 319C: example one, filtering apparatus 319C are a dielectric materials layer, are formed at sputtering way on the surface of prismatic lens 311.Example two, filtering apparatus 319C are a film, are formed in the pressing mode on the surface of prismatic lens 311.Example three, by add one absorb pigment in prismatic lens 311 to form filtering apparatus 319C.
Please refer to Fig. 3 D, shown among the figure is the side view of a LCD again according to the first embodiment of the present invention.Different is with Fig. 3 A, and backlight module 320D comprises blooming, a reflector plate 315, a plurality of light source 314 and the lamp socket 316 that a filtering apparatus 319D, is made up of prismatic lens 311 and diffusion sheet 312.Filtering apparatus 319D is positioned on the light source 314, and is formed on the surface of glass substrate 310, and filtering apparatus 319B is the light of the about 480-500nm of absorbing wavelength and 570-590nm at least.The method that forms filtering apparatus 319D is similar to three kinds of modes that the filtering apparatus 319A of 3A figure is formed on the back up pad 313.Form following three examples of method of filtering apparatus 319D: example one, filtering apparatus 319D are a dielectric materials layer, are formed at sputtering way on the surface of glass substrate 310.Example two, filtering apparatus 319C are a film, are formed in the pressing mode on the surface of glass substrate 310.Example three, by add one absorb pigment in glass substrate 310 to form filtering apparatus 319C.
Second embodiment
In addition, but filtering apparatus can be the optical filter of the light of an absorbing wavelength 480-500nm and 570-590nm, please refer to Fig. 4 A, and it is shown is side view according to a LCD of the second embodiment of the present invention.In Fig. 4 A, LCD 400 mainly includes a glass substrate 410 and a bottom-lighting type back light module 420 as display panel.Backlight module 420 comprises blooming, a reflector plate 415, a plurality of light source 414 and the lamp socket 416 that an optical filter 419, is made up of prismatic lens 411 and diffusion sheet 412.In addition, for general large scale liquid crystal display or tv display screen more than 20 o'clock, are agent structures that configuration one back up pad 413 is come forced fluid crystal display 400 in light source 414 tops, because display panel 410 oversize and diastrophic situations, and then influence display quality to avoid.
The described optical filter of present embodiment is identical with the described filtering apparatus function of first embodiment, all at least the light of about 480-500nm of absorbing wavelength and 570-590nm.But different is for present embodiment and first embodiment, and the optical filter 419 of present embodiment is to be positioned on the light source 414, and on configurable arbitrary assembly between display panel 410 and light source 414.Wherein, the arbitrary assembly between display panel 410 and light source 414, indication include glass substrate 410, prismatic lens 411, diffusion sheet 412 or back up pad 413 etc.Therefore, optical filter 419 for example is to be disposed between light source 414 and the back up pad 413, shown in Fig. 4 A.Perhaps, optical filter 419 for example is to be disposed between back up pad 413 and the diffusion sheet 412, shown in Fig. 4 B.Or optical filter 419 for example is to be disposed between diffusion sheet 412 and the prismatic lens 411, shown in Fig. 4 C.Or optical filter 419 for example is to be disposed between prismatic lens 411 and the glass substrate 410, shown in Fig. 4 D.
At this, form following three examples of method of optical filter 419: mode one, use one dielectric material form optical filter 419 on the arbitrary assembly between glass substrate 410 and the light source 414 with sputtering way.Mode two, use one membraneous material form optical filter 419 on the arbitrary assembly between glass substrate 410 and the light source 414 in the pressing mode.Mode three, absorb formation optical filter 419 in arbitrary assembly of pigment between glass substrate 410 and light source 414 by adding one.
For traditional LCD and LCD of the present invention, after the use optical splitter is measured the spectrum distribution of light source earlier, calculate the x and the y value that can obtain ruddiness (R), green glow (G), blue light (B) respectively through formula.Every numerical value of gained is done after the integration arrangement, obtained a table, as shown in table 1.According to the data in the table 1, drafting can get an XYZ chromaticity diagram, as shown in Figure 5.What Fig. 5 was shown is the XYZ chromaticity diagram of tradition and LCD of the present invention.
Table 1
The NTSC district | Conventional liquid crystal | LCD of the present invention | ||||
x | y | x | y | x | y | |
W x (6500K) | 0.313 | 0.329 | ||||
R | 0.67 | 0.33 | 0.6464 | 0.3373 | 0.6521 | 0.3211 |
G | 0.21 | 0.71 | 0.2803 | 0.5994 | 0.2802 | 0.6319 |
B | 0.14 | 0.08 | 0.1436 | 0.0741 | 0.143 | 0.0689 |
By can obviously finding out among Fig. 5, the disclosed LCD of the above embodiment of the present invention, but utilize the filtering apparatus of the light of an absorbing wavelength 480-500nm (near cyan) and 570-590nm (near yellow orange), make and knownly be able to filtering as two wavelength 480-500nm of color range reference point and the light of 570-590nm with wavelength 480-500nm, wavelength 545nm and wavelength 570-590nm, make the colour developing enlarged areas of LCD and level off to the trichromatic color range of light, to increase the visible color scope of LCD or tv display screen.Filtering apparatus can be an optical filter, is disposed on the arbitrary assembly between display panel 310 and the light source 314, comprises on glass substrate 310, prismatic lens 311, diffusion sheet 312 or the back up pad 313.Perhaps, with a dielectric materials layer, utilize sputtering way formed thereon.Or filtering apparatus is with a film, and is formed thereon in the pressing mode.Or, by add one absorb pigment in back up pad, prismatic lens, diffuser plate or display panel to form this filtering apparatus.
In sum; though the present invention is open as above in conjunction with preferably executing example; yet it is not in order to limit the present invention; those skilled in the art without departing from the spirit and scope of the present invention; can do various changes and retouching, so protection scope of the present invention should be as the criterion with the scope that accompanying claims were defined.
Claims (13)
1. a LCD comprises a glass substrate and a backlight module as display panel, and wherein, this backlight module comprises:
A plurality of light sources;
One blooming, it is positioned on those light sources;
One filtering apparatus, this filtering apparatus are positioned on those light sources, in order to the light of about 480-500nm of the wavelength that absorbs those light sources at least and 570-590nm; And
One lamp socket, it is in order to carry those light sources.
2. LCD according to claim 1, wherein this backlight module also comprises a back up pad, this back up pad is disposed at described these light source tops, and this filtering apparatus is formed on this back up pad.
3. LCD according to claim 2, wherein this filtering apparatus comprises a dielectric materials layer, this dielectric materials layer is formed on this back up pad with sputtering way.
4. LCD according to claim 2, wherein this filtering apparatus comprises a film, this film is formed on this back up pad in the pressing mode.
5. LCD according to claim 2, wherein this filtering apparatus forms in this back up pad by adding an absorption pigment.
6. LCD according to claim 1, wherein this blooming comprises a prismatic lens and a diffuser plate, and this filtering apparatus is formed on this prismatic lens or this diffuser plate.
7. LCD according to claim 6, wherein this filtering apparatus comprises a dielectric materials layer, this dielectric materials layer is formed on this prismatic lens or this diffuser plate with sputtering way.
8. LCD according to claim 6, wherein this filtering apparatus comprises a film, this film is formed on this prismatic lens or this diffuser plate in the pressing mode.
9. LCD according to claim 6, wherein this filtering apparatus forms in this prismatic lens or this diffuser plate by adding an absorption pigment.
10. LCD according to claim 1, wherein this filtering apparatus comprises a dielectric materials layer, this dielectric materials layer is formed on this glass substrate with sputtering way.
11. LCD according to claim 1, wherein this filtering apparatus comprises a film, and this film is formed on this glass substrate in the pressing mode.
12. LCD according to claim 1, wherein this filtering apparatus forms in this glass substrate by adding an absorption pigment.
13. LCD according to claim 1, wherein this filtering apparatus comprises an optical filter, and is disposed between this glass substrate and those light sources.
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CNB031588611A CN100410751C (en) | 2003-09-15 | 2003-09-15 | Liquid crystal display |
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CNB031588611A CN100410751C (en) | 2003-09-15 | 2003-09-15 | Liquid crystal display |
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CN100410751C true CN100410751C (en) | 2008-08-13 |
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Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2007147698A (en) * | 2005-11-24 | 2007-06-14 | Sumitomo Chemical Co Ltd | Wavelength-selective absorption optical member |
US7486354B2 (en) | 2006-01-26 | 2009-02-03 | Hannstar Display Corp. | Backlight module of a liquid crystal display, display device, method of improving color gamut of a display device |
CN102392977A (en) * | 2011-07-12 | 2012-03-28 | 苏州昆仑工业设计有限公司 | Film-coated filter for improving LED (light emitting diode) color rendering |
CN105372873B (en) * | 2015-11-10 | 2019-09-20 | 青岛海信电器股份有限公司 | A kind of backlight module and display device |
CN107748405B (en) * | 2017-11-29 | 2020-12-25 | Tcl华星光电技术有限公司 | Color filter and backlight module |
CN107942577A (en) * | 2017-12-08 | 2018-04-20 | 深圳市华星光电技术有限公司 | A kind of liquid crystal display device |
CN107894675A (en) * | 2017-12-28 | 2018-04-10 | 深圳市华星光电技术有限公司 | Liquid crystal display panel and liquid crystal display device |
CN112925133B (en) * | 2021-03-05 | 2023-03-31 | 京东方科技集团股份有限公司 | Filter element, display module and display device |
Citations (5)
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CN1201157A (en) * | 1997-04-17 | 1998-12-09 | 阿苏拉布股份有限公司 | Liquid crystal displaying device forming colour picture display-screen |
US6078421A (en) * | 1997-04-25 | 2000-06-20 | The Secretary Of State For Defence In Her Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland | Light modulator including a collimator comprising an interference filter |
JP2000330102A (en) * | 1999-05-14 | 2000-11-30 | Koninkl Philips Electronics Nv | Reflective color liquid crystal display device with brightness enhancing subpixel, light scattering film containing color filter for the subpixel and their manufacture |
CN2553398Y (en) * | 2002-04-22 | 2003-05-28 | 凌巨科技股份有限公司 | Penetration colour liquid crystal display |
CN1435716A (en) * | 2002-02-01 | 2003-08-13 | 凌巨科技股份有限公司 | Semi-penetration color LCD |
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Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1201157A (en) * | 1997-04-17 | 1998-12-09 | 阿苏拉布股份有限公司 | Liquid crystal displaying device forming colour picture display-screen |
US6078421A (en) * | 1997-04-25 | 2000-06-20 | The Secretary Of State For Defence In Her Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland | Light modulator including a collimator comprising an interference filter |
JP2000330102A (en) * | 1999-05-14 | 2000-11-30 | Koninkl Philips Electronics Nv | Reflective color liquid crystal display device with brightness enhancing subpixel, light scattering film containing color filter for the subpixel and their manufacture |
CN1435716A (en) * | 2002-02-01 | 2003-08-13 | 凌巨科技股份有限公司 | Semi-penetration color LCD |
CN2553398Y (en) * | 2002-04-22 | 2003-05-28 | 凌巨科技股份有限公司 | Penetration colour liquid crystal display |
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