CN101464589B - LCD device - Google Patents

Abstract

The invention discloses a liquid crystal display device, and provides a green frequency spectrum of a backlight module and a colored filter of a liquid crystal module which is matched with the green frequency spectrum and allows the green frequency spectrum to pass through. The green frequency spectrum comprises a first wave crest with the wavelength of 480 to 500 nm, a second wave crest with the wavelength of 505 to 525 nm and a third wave crest with the wavelength of 535 to 555 nm. Furthermore, the colored filter is matched with the green frequency spectrum of the backlight module and comprises a plurality of black matrixes, a plurality of red picture element areas, a plurality of green picture element areas and a plurality of blue picture element areas; and the longitudinal coordinate of each green picture element area on a CIE 1931 chromaticity coordinate is Gy under a CIE standard C light source, wherein, Gy is more than or equal to 0.635, so that the green color coordinate value of CIE 1931 is improved, and the NTSC of the liquid crystal display device and the related specifications of Adobe RGB according with a wide color gamut can be increased.

Description

Liquid crystal indicator

[technical field]

The present invention refers to a kind of NTSC of raising and the liquid crystal indicator that meets Adobe RGB standard especially relevant for a kind of liquid crystal indicator.

[background technology]

Press, along with the rapid development of internet and radio communication technology, informationization is popularized gradually in the individual, so portable information product, as mobile computer, mobile phone, digital camera, and personal digital assistant etc., all fast-developing with grow up.Since LCD have slimming, lightweight, low power consumption, radiationless pollution and can with advantage such as manufacture of semiconductor technical compatibility, and complying with the rise in digital information market, this strand internet, make it short three during the decade, the application of product more is tremendous growth.Application by low information capacity demonstration such as early stage simple and easy wrist-watch, counter product extends to the monitor or the portable information product that become more meticulous gradually.Its technology contains the exploitation of all stage constructions such as material, equipment, processing procedure, product performance, really is at a tremendous pace.Even to this day, more continue to grow up, become the main flow in flat panel display device of future generation market with surprising imposing manner.

With regard to present digital distance scope (as computer projection machine, back projection TV, plasma television, LCD and LCD TV), product on the market is a feast for the eyes.Comprise domestic and Europe, the United States, Ri Dachang, actively on market, strive for the ground of a seat invariably.Yet in each large-scale sales field, we can see that the TV of each producer is in one line, and image quality shows Come at once.Allow consumer's performance of image quality more each other (as brightness, contrast, color reproducibility and colour cast Like condition), do relatively, chosen again.The wherein reproduction of color to very big of the influence of image quality, will influence the selection of consumer to product.

Color rendering is to lie in the technology that field of liquid crystal display is often mentioned.Yet which type of color is right, often See people See intelligence.Yet starting broadcasting along with the Lu of high image quality Number position, whole world TV is continuous in this Collar territory, under the epoch of getting over Come attention image quality, begins to be paid attention to by people.

Three form and aspect of color add as white.The coloured light additive color process is described below: red (Red), green (Green), blue (Blue) three looks are the mixed basis that produces other coloured light, and three coloured light are independent separately, and wherein any coloured light all can not be produced by other Two kind coloured light mixing.RGB three coloured light mix in varing proportions, can produce the most of color of nature.RGB three primary colors (three mass-tone colors) can get white light with the equal proportion addition.Mixed light is many more, and brightness is high more, and chroma is low more.Be used in computing machine screen, TV and projector etc. complementary colors, W (in vain)=R+G+B are arranged.Any Two form and aspect of primaries add, and can draw complementary colors.

Color be human eye eye observation post produce message, pass to brain and obtain the sensation that multicolored shore is divided.Can be with color-values by X, Y, Z Come derives and calculates Come, color-values can be calculated Come by following formula, and with it x that was changed by XYZ, the y value plots CIE 1931.

$X=k\underset{380}{\overset{780}{\mathrm{\Σ}}}R\left(\mathrm{\λ}\right)S\left(\mathrm{\λ}\right)\stackrel{\‾}{x}\left(\mathrm{\λ}\right)$

$Y=k\underset{380}{\overset{780}{\mathrm{\Σ}}}R\left(\mathrm{\λ}\right)S\left(\mathrm{\λ}\right)\stackrel{\‾}{y}\left(\mathrm{\λ}\right)$

$Z=k\underset{380}{\overset{780}{\mathrm{\Σ}}}R\left(\mathrm{\λ}\right)S\left(\mathrm{\λ}\right)\stackrel{\‾}{z}\left(\mathrm{\λ}\right)$

$K=\frac{100}{\underset{380}{\overset{780}{\text{\∫}}}S\left(\mathrm{\λ}\right)\stackrel{\‾}{y}\left(\mathrm{\λ}\right)\mathrm{d\λ}}|$

$\left.\begin{array}{c}S\left(\mathrm{\λ}\right):\mathrm{Relative\; spectral\; power\; distribution\; of\; the}\\ \mathrm{illu}\min \mathrm{ant}\\ \stackrel{\‾}{x}\left(\mathrm{\λ}\right),\stackrel{\‾}{y}\left(\mathrm{\λ}\right),\stackrel{\‾}{z}\left(\mathrm{\λ}\right):\mathrm{Color}-\mathrm{matching\; functions\; for\; CIE}{2}^{*}\\ S\tan \mathrm{dard\; Observer}\left(1931\right)\\ R\left(\mathrm{\λ}\right):\mathrm{Spectral\; reflec}\tan \mathrm{ce\; of\; specimen}\end{array}\right|$

$\left.\begin{array}{c}x=\frac{X}{X+Y+Z}\\ y=\frac{Y}{X+Y+Z}\\ z=\frac{Z}{X+Y+Z}\end{array}\right|$

x+y+z＝1|

The NTSC colour gamut is a standard.Because this standard is arranged, just display manufacturer can this Come makes the colour gamut expressive ability of display, as the sign 75%NTSC that has of LCD, and represent it to have the colour developing ability of 75%NTSC colour gamut size.Colour gamut colour developing ability and generally the color display capabilities of computing machine screen specification (as 1.67 hundred ten thousand colors) be different.High image quality Number position TV (hd-tv) is owing to showing plurality of specifications, so its colour gamut expressive ability is considerable.Than being 72%NTSC, represent that the color gamut that this display can show is 71 percent of a NTSC regulation such as certain display color gamut area.72%NTSC is approximately the standard of present conventional television (CRT).Above said three primary colors gamut area is with known three primary colors chromaticity coordinate, utilizes Heron theorem Come to try to achieve its area, and as follows, a, b, c represent indivedual length of sides of RGB trichromatic coordinate respectively, and Δ represents that leg-of-mutton area is NTSC.

s＝a+b+c/2

Δ＝s(s-a)(s-b)(s-c)

The color rendering of display has three kinds according to the renewal frequency difference of throwing image: TSC-system, PAL-system and SECAM-system at present.The NTSC colour television standard is the colourcast standard of National Television System Committee's definition in 952 years, is called quadrature amplitude balance system.PAL is called line-by-line inversion quadrature amplitude balance system, is the colourcast standard of Germany's formulation in 1962, and China uses this standard.SECAM is the colourcast standard that France formulates, and is called order and transmits colour and storage system.These three kinds of television systems all are the compatible standards.PAL colour television standard regulation, total line number of a two field picture is 625, staggered scanning.Line-scanning frequency is 15625Hz, and the cycle is 64 μ s; Field-scanning period is 50Hz, and frame frequency is 25Hz.When sending TV signal, the time of transmitted image is 52.2 μ s in each row, and remaining 11.8 μ s is the retrace interval of line scanning, not transmitted image.The number of scanning lines of each is that 625/2=312.5 is capable, and wherein 25 row are made field retrace, and not transmitted image, so every frame has only 575 row that image is arranged.Color model adopts YUV.The level resolution line number of image should be on the image the actual black and white vertical bar number that can distinguish divided by the ratio of width to height coefficient.

The computing formula of the level sharpness of TV is: the effective line time of level sharpness TVL/PH=(μ s) * 2 * frequent width (MHz) ÷ the ratio of width to height coefficient

With the PAL color television standard, a frame television image is made up of 625 horizontal scanning lines, just has 625 pixel columns, and the wide high ratio of television image is 4: 3, and can calculate every row thus should have 833 pixels.In fact, effective line number of every two field picture is 575 row. so the vertical definition of the existing television standard of China is 575 * 0.7=403TVL/PH.Should be noted that the vertical definition of TV is by the television system decision, and is irrelevant with the transmission and the video signal frequency range of TV signal.PAL television standard regulation line period is 64 μ s, and effectively line time is 52.2 μ s, and nominal video signal frequency range is 6MHz, so the level sharpness of existing television standard is:

Level sharpness (SDTV)=52 (μ s) * 2 * 6 (MHz) ÷ (4/3)=468TVL/PH

As far back as the eighties in last century, Consultative Committee on International Radio (CCIR) (CCIR) has just formulated colour TV picture digitizing standard, is called CCIR 601 standards, now changes ITU-R BT.601 standard into.This standard code the sample frequency used when converting digital picture to of colour TV picture, the transformational relation between two color spaces of RGB and YCbCr etc.CCIR is that TSC-system, PAL-system and SECAM-system have been stipulated common television image sample frequency.

Color space (ColorSpace) is called color gamut space again, its expression be a chromatic image the Color Range that can show.CMYK is two kinds of different color spaces with RGB, and CMYK is a color space commonly used on the output devices such as printing machine and printer; And RGB then is subdivided into: multiple different color spaces such as AdobeRGB, Apple RGB, ColorMatch RGB, CIE RGB and sRGB.Wherein, Apple RGB is the color space of the apple display acquiescence of Apple, is widely used in the phototypesetting of planar design and printing; CIE RGB is the color space standard that international color is organized to set up.The most common with Adobe RGB and these two kinds of color spaces of sRGB, the gamut range of relative sRGB is narrow relatively, can't satisfy more high-end professional color demand, sees also Fig. 1, and Adobe RGB is A ', and sRGB is B '.Also therefore, more and more many displays are supported this broader color gamut space of Adobe RGB; In fact, display, printer or printing machine support that Adobe RGB is still general inadequately at present.

At present see that on the market the display that can support Adobe RGB mainly is to utilize the characteristic of RGB LED high color rendering to reach, though the CCFL of same colored filter collocation high color rendering can reach the above high color saturation of NTSC95%, the gamut range that but can't show the contained lid of Adobe RGB fully is especially in the part of green.

Because the problems referred to above the invention provides a kind of liquid crystal indicator, to promote NTSC and broader colour gamut.

[summary of the invention]

Fundamental purpose of the present invention is to provide a kind of liquid crystal indicator, improves the green emitting frequency spectrum of the light source of backlight module, to improve green chromaticity coordinates, by this with NTSC that improves liquid crystal indicator and the colour gamut standard that meets Adobe RGB.

Secondary objective of the present invention, be to provide a kind of liquid crystal indicator, because the chromaticity coordinates value of the green light source of backlight module improves, can penetrate Liquid Crystal Module for making the green emitting frequency spectrum, with transparent colored filter of the green emitting frequency spectrum of collocation light source.

To achieve the above object, the present invention discloses a kind of liquid crystal indicator, the green emitting frequency spectrum of one backlight module is provided, and provide collocation can make the colored filter of the Liquid Crystal Module that the green emitting frequency spectrum penetrates, wherein this green emitting frequency spectrum comprises 480 ~ 500nm wavelength of a primary peak, 535 ~ 555nm wavelength of 505 ~ 525nm wavelength of one secondary peak and one the 3rd crest, moreover, must the arrange in pairs or groups green emitting frequency spectrum of this backlight module of this colored filter, comprise a plurality of black matrix"s in colored filter, a plurality of red picture element regions, a plurality of green picture element regions and a plurality of blue picture element region, those green picture element regions under CIE standard C light source, y coordinate on CIE 1931 chromaticity coordinates is Gy, Gy 〉=0.635 wherein, to improve in the chromaticity coordinates value of the green of CIE 1931 related specifications that can increase the NTSC of liquid crystal indicator and meet the Adobe RGB of wide colour gamut.

[description of drawings]

Fig. 1 be the Adobe RGB of prior art and sRGB in the chromaticity coordinates synoptic diagram of CIE 1931;

Fig. 2 is the structural representation of the liquid crystal indicator of a preferred embodiment of the present invention;

Fig. 3 is the spectrogram of the light source of a preferred embodiment of the present invention;

Fig. 4 is the spectrogram that penetrates of the green picture element region of the colored filter of the light source of a preferred embodiment of the present invention; And

Fig. 5 be a preferred embodiment of the present invention liquid crystal indicator in the chromaticity coordinates synoptic diagram of CIE 1931.

[primary clustering symbol description]

10 backlight modules, 36 red picture element regions

12 lamp source A ' Adobe RGB

20 Liquid Crystal Module B ' sRGB

30 colored filter C ' liquid crystal indicator of the present invention

32 red picture element regions

34 red picture element regions

[embodiment]

Below further understand and understanding, sincerely help with preferred embodiment and cooperate detailed explanation for your juror is had architectural feature of the present invention and the effect reached, illustrate as after:

Because LCD is to be fundamental with the liquid crystal molecule material, the liquid crystal molecule of this gonorrhoea is clipped between two glass sheets of handling through orientation, can be combined into present hot topic and the liquid crystal display device closely bound up with our daily life.

This intermediate state molecule between solid-state and liquid state, not only have liquid and be subject to the external force effect and mobile characteristic, also has the distinctive optics aeolotropic of crystal matter, so the ordered state that can utilize extra electric field to order about liquid crystal changes to other sensing, optical characteristics when causing the light penetration liquid crystal layer changes, this promptly is to utilize the electric field that adds to produce the modulation phenomenon of light, and we are referred to as the photoelectric effect of liquid crystal.Utilize this effect can produce various LCD, as stable twisted nematic LCD, STN Super TN type LCD, and Thin Film Transistor-LCD etc.

Structure with the stable twisted nematic LCD is illustrated.The essential structure of stable twisted nematic LCD is: two conducting glass substrates up and down, coating one deck forms the alignment film of superfine rill via friction on conducting film, when nematic crystal is fed into up and down between two sheet glass crack, because liquid crystal molecule has the flow characteristics of liquid, therefore be easy to arrange along the rill direction.Near substrate rill position the time, the suffered binding force of liquid crystal molecule is bigger, thus can arrange along upper and lower base plate rill direction, and the liquid crystal molecule binding force of center section is less, can form twisted arrangement in liquid crystal cell.Because turning round altogether, the nematic crystal molecule in liquid crystal cell turn 90 degrees, so claim that this mode of operation is a stable twisted nematic.In addition, the upper and lower base plate outside respectively adds a slice Polarizer.

Moreover the light and shade that further specifies this display contrasts the display action principle.At first, by the emitted light of white back light source by behind first Polarizer, natural light is promptly turned to line polar biased light by polar biased, when not applying voltage, then this line polar biased light enters in the liquid crystal cell, gradually along with the liquid crystal molecule torsional direction advances, because of the penetrating shaft of two Polarizers up and down and alignment film in the same way, promptly the penetrating shaft of two Polarizers is orthogonal, so light can form bright state by second Polarizer.On the contrary, if when applying voltage, liquid crystal molecule tends to and applies direction of an electric field and be parallel, therefore liquid crystal molecule is one by one perpendicular to glass baseplate surface, then line polar biased light directly arrives second Polarizer by liquid crystal cell, and this time can be absorbed by Polarizer and can't pass through, and forms dark state.Therefore, utilize suitable driving voltage can obtain the effect that bright dark contrast shows, this display frame is the pattern of a white gravoply, with black engraved characters.

See also Fig. 2, in the LCD display system, liquid crystal molecule is unlike other self-emitting light source (as OLED), itself be not irradiative, LCD is the modulation of making light polarization, therefore must reach by collocation polarizer, Come is responsible for the modulation of bright and dark light, therefore all needs the light source of backlight module 10 Come as screen in the LCD application.Backlight module 10 is exported except enough brightness must be provided, the homogeneity of intensity distributions, color uniformity, and color rendering etc., also be the important in design problem of backlight module 10.Backlight module 10 comprises at least one light source 12, enter Light Pipe (penetrance 60%) from light source 12 (100%), by Polarizer (penetrance 40%), Liquid Crystal (passing rate 95%), colored filter (penetrance 30%), Analyser (penetrance 95%), add superficies reflections (penetrance 90%) at last, therefore begin outside screen from light source, bright dipping only remaining 5% less than.The cold-cathode tube of light source 12 has the characteristic of broad spectrum, but there is relative peak in the district at red, green, blue, but the colour gamut of the LCD that is caused has 70%NTSC approximately, therefore in order to be that bright-coloured real performance colorized optical filtering chip technology colour liquid crystal display device is arranged is to utilize spacing color mixed technology to obtain the Presentation Function of full-colorization in the output of color, just in colored filter 30 each picture element, arrange filter coating and a plurality of black matrix" 33 of three picture element regions of a plurality of red, green, blues 32,34,36 as the LCD backlight.

The light source 12 that backlight module 10 is emitted, through behind a plurality of red, green, blue picture element regions 32,34,36 of colored filter 30, can be considered three new color light sources, the colouristic properties of red, green, blue three rifles of this and traditional iconoscope-cathode-ray tube (CRT) is identical.Usually by adding driving voltage on LCD plates, order about the interior molecular changes ordered state of liquid crystal cell of Liquid Crystal Module 20, and then change light polarization state and light transmission rate.Just look like in each picture element, utilize three different voltages to come the light intensity of the sub-picture element red, green, blue of direct modulation the same.Change along with polarizing angle, the colour mixture addition again behind the sub-picture element region 32,34,36 of the red, green, blue of color filter film of the light of each varying strength, the picture element of different colours and brightness will be shown, a riotous with colour pattern or image can be formed via each picture element.

See also Fig. 3, it is the spectrogram of the light source of a preferred embodiment of the present invention; As shown in the figure, the ripple that the ripple that the green frequency spectrum that backlight module light source of the present invention is provided comprises a primary peak 110 is longer than 480 ~ 500nm, a secondary peak 120 is longer than the ripple of 505 ~ 525nm and one the 3rd crest 130 and is longer than 535 ~ 555nm, and, the peak-peak that has the peak-peak of 489nm, peak-peak that these secondary peak 120 cordings have 517nm and the 3rd crest 130 cordings that 545nm is arranged in primary peak 110 cordings; Fluorescent powder prescription system in the lamp of the present invention source comprises one first fluorescent powder, is selected from LaPO ₄: Ce, Tb and LaPO ₄: one of them of group that Eu forms or combination in any person, and/or one second fluorescent powder are selected from Zn ₂SiO ₄: Mn and BAM:Eu, wherein one or the combination in any person of group that Mn forms.

Moreover, this lamp source comprise red fluorescence powder be the peak value of wavelength more than 580nm, it is to be selected from Y ₂O ₃: Eu system, Y (P, V) O ₄: Eu system and xMgO. (4-x) MgF ₂.CeO ₂Wherein one or the combination in any person of group that system forms; And comprise blue colour fluorescent powder be the peak value of wavelength below 480nm, it is to be selected from BAM:Eu system and Sr ₃(PO ₄) ₃Wherein one or the combination in any person of Cl:Eu group that system forms.

And in the essential structure of colored filter, between glass substrate, dispose the fine colored picture element region of red, green, blue, and and between red, green, blue, accompanying black matrix" 33 respectively, black matrix" 33 has the contrast of lifting and prevents effect such as look material colour mixture.Because the light transmittance ratio when " contrast " is bright attitude with dark attitude, when correlative value heals when big, then the image of being seen is more clear, so for contrast is promoted, when impressed voltage orders about the liquid crystal action (dark attitude, light is interdicted), driven picture element must present very dark.Therefore, be suitable for black matrix" 33 effectively and prevent light leakage phenomena.

Simultaneously, for preventing the colour mixture between red, green, blue look material, red, green, blue picture element region 32,34,36 in the colored filter can not contact with each other, thus between material of all kinds, must set colourless material, lighttight photomask, so that the effect of " avoiding light leak " and " three primary colors colour mixture " to be provided.In addition, apply layer protecting film,, avoid them in follow-up processing procedure, to suffer unnecessary damage, also having the drop of avoiding between their look material films and light shield layer concurrently simultaneously, make its planarization with protection red, green, blue filter coating at outermost layer.The white light penetrance of red, green, blue look material film is about 25%.

Be the green frequency spectrum in the backlight module lamp of the present invention source of arranging in pairs or groups, cie color Gy＞0.635 of the green picture element region of those of this colored filter under CIE standard C light source, the best is Gx=0.261, Gy=0.642; And, seeing also Fig. 4, it is the spectrogram of green picture element region of the colored filter of a preferred embodiment of the present invention; As shown in the figure, green picture element region penetrates the half Gao Bokuan≤90nm of frequency spectrum.

At last, see also Fig. 5, its be a preferred embodiment of the present invention liquid crystal indicator in the chromaticity coordinates synoptic diagram of CIE1931; As shown in the figure, use of the present invention comprises the light source of backlight module of this first frequency spectrum, second frequency spectrum and the 3rd frequency spectrum to penetrate this Liquid Crystal Module (and green picture element region of this colored filter of arrange in pairs or groups penetrable this first frequency spectrum, second frequency spectrum and the 3rd frequency spectrum), x coordinate on CIE 1931 chromaticity coordinates is Gx, the y coordinate is Gy, wherein Gx 〉=(1.13) * Gy+1 and Gx≤0.1*Gy+0.15, and Gy 〉=0.71; And the x coordinate of redness on CIE 1931 chromaticity coordinates is Gx, wherein Rx 〉=0.64; And blue y coordinate on CIE 1931 chromaticity coordinates is By, By≤0.06 wherein, and its optimum colour coordinate is shown in the following table:

Chromat icity	Rx	Ry	Gx	Gy	Bx	By
							Value	0.660	0.329	0.209	0.711	0.146	0.056
Adobe RGB	0.64	0.33	0.201	0.710	0.15	0.06

By last table and as can be known graphic, liquid crystal indicator provided by the present invention can meet the wide colour gamut standard of Adobe RGB, C ' is a liquid crystal indicator of the present invention, though can reach high color saturation more than the NTSC95% with the lamp source of the high color rendering that solves prior art, the gamut range that but can't show the contained lid of Adobe RGB fully is especially in the part of green.

In sum, the present invention be real be one to have novelty, progressive and can supply the industry user, the patented claim important document that should meet China's Patent Law defined undoubtedly, the whence proposes application for a patent for invention in accordance with the law, pray an ancient unit of weight office grant early accurate sharp, to feeling for praying.

The above person of thought, it only is a preferred embodiment of the present invention, be not to be used for limiting scope of the invention process, the equalization of doing according to the described shape of the present patent application claim, structure, feature and spirit changes and modifies such as, all should be included in the claim of the present invention.

Claims (13)

1. liquid crystal indicator, wherein the light source of the backlight module of this liquid crystal indicator ripple that comprises the primary peak ripple of being longer than 480～500nm, the secondary peak ripple of being longer than 505～525nm and one the 3rd crest is longer than 535～555nm, this liquid crystal indicator comprises a colored filter, the a plurality of green picture element region that this colored filter comprises is under CIE standard C light source, y coordinate on CIE 1931 chromaticity coordinates is Gy, wherein Gy 〉=0.635.

2. liquid crystal indicator according to claim 1 is characterized in that this primary peak has the peak-peak of 489nm.

3. liquid crystal indicator according to claim 1 is characterized in that this secondary peak has the peak-peak of 517nm.

4. liquid crystal indicator according to claim 1 is characterized in that the 3rd crest has the peak-peak of 545nm.

5. liquid crystal indicator according to claim 1 is characterized in that this liquid crystal indicator comprises at least one fluorescent tube, and this fluorescent tube comprises one first fluorescent powder, is selected from LaPO ₄: Ce, Tb and LaPO ₄: one of them of group that Eu forms or combination in any person.

6. liquid crystal indicator according to claim 5 is characterized in that, this fluorescent tube comprises one second fluorescent powder, is selected from Zn ₂SiO ₄: Mn and BAM:Eu, one of them of group that Mn forms or combination in any person.

7. liquid crystal indicator according to claim 1 is characterized in that, this colored filter comprises a plurality of black matrix"s, a plurality of red picture element region and a plurality of blue picture element region, and wherein the frequency spectrum that penetrates of those green picture element regions is 480～555nm.

8. liquid crystal indicator according to claim 7 is characterized in that, half Gao Bokuan that the penetrates frequency spectrum≤90nm of those green picture element regions.

9. liquid crystal indicator according to claim 1, it is characterized in that the x coordinate that the light of this liquid crystal indicator is contained on CIE 1931 chromaticity coordinates is Gx, the y coordinate is Gy, wherein Gx 〉=(1.13) * Gy+1 and Gx≤0.1*Gy+0.15, and Gy 〉=0.71.

10. liquid crystal indicator according to claim 9 is characterized in that this liquid crystal indicator comprises a colored filter, and this colored filter comprises a plurality of black matrix"s, a plurality of red picture element region and a plurality of blue picture element region.

11. liquid crystal indicator according to claim 10 is characterized in that, half Gao Bokuan that the penetrates frequency spectrum≤90nm of those green picture element regions.

12. liquid crystal indicator according to claim 9 is characterized in that, this liquid crystal indicator comprises at least one fluorescent tube, and this fluorescent tube comprises one first fluorescent powder, is selected from LaPO ₄: Ce, Tb and LaPO ₄: one of them of group that Eu forms or combination in any person.

13. liquid crystal indicator according to claim 12 is characterized in that, this fluorescent tube comprises one second fluorescent powder, is selected from Zn ₂SiO ₄: Mn and BAM:Eu, one of them of group that Mn forms or combination in any person.

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