CN101256311B - Lcd - Google Patents
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- CN101256311B CN101256311B CN2008100917621A CN200810091762A CN101256311B CN 101256311 B CN101256311 B CN 101256311B CN 2008100917621 A CN2008100917621 A CN 2008100917621A CN 200810091762 A CN200810091762 A CN 200810091762A CN 101256311 B CN101256311 B CN 101256311B
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- lcd
- filter layer
- backlight module
- red
- nanometers
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Abstract
A liquid crystal display comprises a backlight module and liquid crystal display panel, wherein the backlight module comprises at least one white light source, the irradiance frequency spectrums of the backlight module respectively have relative maximum brightness peaks among wavelength 430nm to 470nm and among wavelength 520nm to 620nm. The liquid crystal display panel is disposed above the backlight module and comprises a plurality of substrates and liquid crystal layer between the substrates, wherein the substrate comprises a red filter layer, a green filter layer and a blue filter layer, and the red filter layer is below CIE standard light source C and the x coordination value and the y coordination value on the CIE 1931 color coordination are respectively Rx and Ry, wherein the Rx>=0.65, and Ry<=0.32. The invention can increase the red saturation of liquid crystal display and improve the phenomenon of red biasing orange on the display panel.
Description
Technical field
The present invention relates to a kind of display, and be particularly related to a kind of LCD.
Background technology
Have that high image quality, space utilization efficient are good, (Liquid Crystal Display LCD) becomes the main flow of display to the LCD of low consumpting power, advantageous characteristic such as radiationless gradually.Along with popularizing of LCD, the important indicator of consumer when buying LCD is high color reappearance (colorreproduction).There have been several high color reproducing technologies at present, can have satisfied the consumer for the reproducible demand of high color.
LCD is mainly by display panels and provide the backlight module of display panels light source to be formed, wherein display panels comprise for example active elements array substrates, colored optical filtering substrates and be disposed at active elements array substrates and colored optical filtering substrates between liquid crystal layer, wherein colored optical filtering substrates has red filter layer, green filter layer and blue color filter layer.Generally speaking, the light source in the backlight module can adopt cold-cathode fluorescence lamp (Cold-Cathode Fluorescent Lamp, CCFL), light emitting diode or the light source of other kinds.
For the color representation of LCD, normally (National Television System Committee, NTSC) ordered standard is weighed the color saturation of display with NTSC.What on the other hand, have an affiliated field knows the knowledgeable when adjusting the red saturation scale of LCD, green saturation and blue saturation, the reference frame that can adopt sRGB or EBU standard to adjust as color usually usually.According to the sRGB standard, red scale, green coordinate and blue coordinate the expression of CIE1931 be respectively red standard (Rx, Ry)=(0.640,0.330), green standard (Gx, Gy)=(0.300,0.600) and blue standard (Bx, By)=(0.150,0.060).
In high color technological development, the kind of backlight module is played the part of important role, and (Light Emitting Diode, kind LED) is most popular with white light emitting diode at present.Because of advantages such as white light emitting diode have power saving, reaction rate is fast, volume is little, the life-span is long, simple in structure and nontoxic, therefore already extensively in carry-along backlight module.In the backlight module of the white light emitting diode that is widely used in the market, wherein a kind ofly, blue light-emitting diode constitutes white light for adding the combination of yellow fluorescent powder.
Fig. 1 is known a kind of CIE1931 chromaticity coordinate synoptic diagram that utilizes LCD.Please refer to Fig. 1, the white light that backlight module provided in the LCD 10 is to add that with blue light-emitting diode the combination of yellow fluorescent powder is constituted, as shown in Figure 1, LCD 10 still has one section gap with the red scale of sRGB standard in the performance of redness, therefore above-mentionedly add that with blue light-emitting diode light source that yellow fluorescent powder is constituted has the shortcoming of color rendering difference.More specifically, LCD 10 has the phenomenon of inclined to one side tangerine in the performance of redness, causes the red saturation scale performance of LCD 10 desirable not to the utmost, and then influences the LCD 10 whole color representation that show.
Summary of the invention
The invention provides a kind of LCD, it can promote red saturation scale, and the redness of improving display frame shows the shortcoming of inclined to one side tangerine.
The present invention proposes a kind of LCD, and it comprises backlight module and display panels.Wherein, backlight module has at least one white light source, and the luminous frequency spectrum of backlight module has the relative maximum brightness peak between wavelength 430 nanometer to 470 nanometers and between wavelength 520 nanometer to 620 nanometers respectively.Display panels is disposed at the backlight module top, and display panels comprises two substrates and the liquid crystal layer between aforesaid substrate, one of them has red filter layer, green filter layer and blue color filter layer two substrates, red filter layer is under CIE standard light source C, x coordinate values and y coordinate values on CIE 1931 chromaticity coordinatess are respectively Rx and Ry, wherein Rx 〉=0.65, and Ry≤0.32.
In one embodiment of the invention, white light source is a light emitting diode.In one embodiment, light emitting diode comprises blue light diode and is positioned at phosphor material powder on the inwall of blue light diode.
In one embodiment of the invention, red filter layer in the penetrance of yellow band in fact smaller or equal to 40%.In one embodiment, the wavelength of yellow band is between 585 nanometers and 605 nanometers, and in another embodiment, yellow band for example is 595 nanometers.
In one embodiment of the invention, red filter layer in the penetrance of yellow band in fact more than or equal to 30%.
In one embodiment of the invention, backlight module for example is direct type backlight module or side incident type backlight module.
In one embodiment of the invention, the composition of red filter layer for example comprises PR254, PR177 and three kinds of pigment of PY150.
In one embodiment of the invention, LCD is suitable for showing red picture, and the y coordinate values of the colourity of red picture on CIE 1931 chromaticity coordinatess be Ry ', wherein Ry '≤0.335.
In sum, in LCD of the present invention, distribute by the relative maximum brightness peak in the luminous frequency spectrum of control backlight module, arrange in pairs or groups again and on the cie color coordinate, satisfy the chromatic filter layer of particular kind of relationship, can promote the red saturation scale of LCD, the redness of improving display frame shows the phenomenon of inclined to one side tangerine.
For above-mentioned and other purposes, feature and advantage of the present invention can be become apparent, preferred embodiment cited below particularly, and conjunction with figs. are described in detail below.
Description of drawings
Fig. 1 is known a kind of CIE1931 chromaticity coordinate synoptic diagram that utilizes LCD.
Fig. 2 is the synoptic diagram of the LCD of one embodiment of the present of invention.
Fig. 3 be in one embodiment of the present of invention the luminous frequency spectrum of backlight liquid crystal display module with and the performance of the penetrance frequency spectrum of red filter layer.
Fig. 4 is the CIE 1931 chromaticity coordinate comparison diagrams of LCD of the present invention and known LCD.
Wherein, description of reference numerals is as follows:
10,100: LCD
110: backlight module
120: display panels
112: white light source
122: colored optical filtering substrates
122R: red filter layer
122G: green filter layer
122B: blue color filter layer
124: electric crystal array film substrate
126: liquid crystal layer
A, B, C: frequency spectrum
Rx: the x axle chromaticity coordinate numerical value of red filter layer
Ry: the x axle chromaticity coordinate numerical value of green filter layer
Rx ': the x axle chromaticity coordinate numerical value of LCD
Ry ': the y axle chromaticity coordinate numerical value of green filter layer
P1: the high-high brightness peak value between luminous frequency spectrum medium wavelength 430 nanometer to 470 nanometers
P2: the high-high brightness peak value between luminous frequency spectrum medium wavelength 520 nanometer to 620 nanometers
Embodiment
Fig. 2 is the synoptic diagram of the LCD of one embodiment of the present of invention.Please refer to Fig. 2, LCD 100 comprises backlight module 110 and display panels 120, and wherein backlight module 110 for example is direct type backlight module or side incident type backlight module.Backlight module 110 has at least one white light source 112, and wherein the light that sent of white light source 112 is suitable for providing display panels 120, and in the present embodiment, and white light source 112 is to be example with the light emitting diode that white light can be provided.
Please continue with reference to Fig. 2, display panels 120 is disposed at backlight module 110 tops.Display panels 120 mainly is made up of two substrates and the liquid crystal layer between two substrates 126.As shown in Figure 2, aforementioned two substrates can be respectively electric crystal array film substrate 124 and colored optical filtering substrates 122, and wherein colored optical filtering substrates 122 has red filter layer 122R, green filter layer 122G and blue color filter layer 122B.Certainly, in other embodiments, aforementioned two substrates also can be respectively chromatic filter layer (color filter on array on matrix base plate; COA) substrate and subtend substrate with common electrode perhaps are respectively matrix layer (array on color filter on colored optical filtering substrates; AOC) substrate and have the subtend substrate of common electrode.
Fig. 3 be in one embodiment of the present of invention the luminous frequency spectrum of backlight liquid crystal display module with and the penetrance frequency spectrum of red filter layer performance synoptic diagram.Please refer to Fig. 3, frequency spectrum A is the luminous frequency spectrum of backlight module 110, and it has the relative maximum brightness peak between wavelength 430 nanometer to 470 nanometers and between wavelength 520 nanometer to 620 nanometers respectively, for example the P1 of figure intermediate frequency spectrum A and P2.Particularly, has multiple phosphor material powder on the inwall of white light source 112, in order to optical properties such as the brightness of adjusting white light source, colourities, in the present embodiment, provide the white light source of above-mentioned luminous frequency spectrum for example to be made up of the suitable phosphor material powder of blue light diode collocation, this phosphor material powder for example is a yellow fluorescent powder.
After it should be noted that backlight module 110 collocation with above-mentioned luminous frequency spectrum has the red filter layer 122R of suitable color representation, the redness that can effectively improve known LCD 10 phenomenon of performing poor.Definite, when measuring the red filter layer 122R of present embodiment with the ordered standard illuminants (illuminant-C) of the use CIE of International Commission on Illumination, red filter layer 122R can satisfy following relationship formula: Rx 〉=0.65, and Ry≤0.32, Rx and Ry are defined as red filter layer 122R respectively under illuminant-C herein, x coordinate values on CIE 1931 chromaticity coordinatess and y coordinate values.
Please continue with reference to Fig. 3, the red filter layer 122R of present embodiment is in the relational expression of for example satisfied 30%≤T of the penetrance T of yellow band≤40%, but the present invention is not as limit.Detailed speech, the wavelength of above-mentioned yellow band for example is between 585 nanometers and 605 nanometers, in the present embodiment, the calculating of the penetrance T of red filter layer 122R is to be example and known making comparisons with 595 nanometers.Frequency spectrum B is the penetrance frequency spectrum of red filter layer under illuminant-C in the known LCD 10, and being red filter layer 122R of the present invention, frequency spectrum C under illuminant-C, penetrates frequency spectrum, by among the figure as can be known, red filter layer 122R in the known LCD 10 is about 57.5% in the penetrance of wavelength 595 nanometers, and red filter layer 122R of the present invention is about 33.4% in the penetrance of wavelength 595 nanometers.In other words, when through the light transmittance that is in red band edge behind the red filter layer 122R during less than special value, can significantly promote the red saturation scale of light by LCD 100, and keep LCD 100 penetrance to a certain degree, make LCD 100 under the situation of the little change of brightness, to promote the performance of red color significantly.
What deserves to be mentioned is, when the making of the red filter layer 122R that satisfies above-mentioned condition, can adopt three kinds of pigment of PR254, PR177 and PY150 on the practice, certainly, the material of red filter layer 122R also can utilize other materials to be allocated, and the present invention is not as limit.Wherein, the international standard MAT'L mark under above-mentioned pigment numbering PR254, PR177 and PY150 belong in the art.
Fig. 4 is the CIE 1931 chromaticity coordinate comparison diagrams of LCD of the present invention and known LCD.Please refer to Fig. 4, known LCD 10 has evident difference with the LCD 100 of present embodiment on the red saturation scale of chromaticity coordinate figure.Detailed speech, the backlight module 110 in the LCD 100 has relative maximum brightness peak P1 and P2 (being shown in Fig. 3) respectively at luminous frequency spectrum respectively between wavelength 430 nanometer to 470 nanometers and between wavelength 520 nanometer to 620 nanometers.The present invention for example utilizes the penetrance of regulation and control red filter layer 122R in red band edge, to have the Rx of satisfying 〉=0.65, and when the display panels 120 of the red filter layer 122R of Ry≤0.32 is done collocation with above-mentioned backlight module 110, can be so that the light source that backlight module 110 is provided be when passing through display panels 120, the performance of high color saturation can be arranged, especially excellence aspect the performance on red saturation scale.Below will enumerate the color representation of some data aid illustration LCD 100.
Table one
In detail, table one is the chromaticity coordinate measured data of the LCD 100 in known LCD 10 and the present embodiment.See also table, the known chromaticity coordinate numerical value (Rx of LCD 10 employed red filter layer on the cie color coordinate, Ry) for example be (0.660,0.330), and the chromaticity coordinate numerical value (Rx of the LCD 100 employed red filter layer 122R of one embodiment of the present of invention on the cie color coordinate, Ry) for example be (0.657,0.320), the display panels 120 of the red filter layer 122R of above-mentioned relation is satisfied in utilization of the present invention, and make it and above-mentionedly have a relative maximum brightness peak P1, after the backlight module 110 of P2 is done collocation, can be so that preferableization of color representation of LCD 100 integral body, and make the performance red standard in the convergence sRGB standard more of red saturation scale, effectively improve the red partially tangerine phenomenon of known LCD 10 when showing.
Please be simultaneously with reference to Fig. 4 and table one, LCD 100 is when showing red picture, the chromaticity coordinate numerical value of the colourity of red picture on CIE 1931 chromaticity coordinatess (Rx ', Ry ') is approximately (0.644,0.333), compared to the shown red color coordinate values of known LCD 10 (Rx ', Ry ') (0.646,0.343), LCD 100 level off to the red standard (Rx in the sRGB standard, Ry)=(0.640,0.330).In other words, when the backlight module 110 that satisfies above-mentioned particular kind of relationship formula is done collocation with display panels 120, can promote the color representation of LCD 100, effectively improve the excitation not good problem of LCD 100 when showing redness, and then promote the display quality of LCD 100.
In sum, when adjusting the color saturation of LCD integral body, must consider the luminous spectrum distribution of backlight module and the color representation of corresponding red filter layer in the lump, could effectively improve the red phenomenon of tangerine partially, guarantee between the color saturation of each color without interruption each other, effectively promote the color saturation of LCD integral body.
Though the present invention discloses as above with embodiment; right its is not in order to qualification the present invention, any those skilled in the art, without departing from the spirit and scope of the present invention; when can doing various variations and modification, so protection scope of the present invention is as the criterion when looking the appended claim person of defining.
Claims (9)
1. LCD comprises:
Backlight module has at least one white light source, and wherein the luminous frequency spectrum of this backlight module has the relative maximum brightness peak between wavelength 430 nanometer to 470 nanometers and between wavelength 520 nanometer to 620 nanometers respectively; And
Display panels, be disposed at this backlight module top, and this display panels comprises two substrates and the liquid crystal layer between described two substrates, one of them has red filter layer, green filter layer and blue color filter layer wherein said two substrates, this red filter layer is under CIE standard light source C, x coordinate values and y coordinate values on CIE 1931 chromaticity coordinatess are respectively Rx and Ry, wherein Rx 〉=0.65, and Ry≤0.32.
2. LCD as claimed in claim 1, wherein this white light source is a light emitting diode.
3. LCD as claimed in claim 2, wherein this light emitting diode comprises blue light diode and is positioned at phosphor material powder on the inwall of this blue light diode.
4. LCD as claimed in claim 1, wherein this red filter layer in the penetrance of yellow band smaller or equal to 40%, and more than or equal to 30%.
5. LCD as claimed in claim 4, wherein the wavelength of this yellow band is between 585 nanometers and 605 nanometers.
6. LCD as claimed in claim 4, wherein this yellow band is 595 nanometers.
7. LCD as claimed in claim 1, wherein this backlight module comprises direct type backlight module or side incident type backlight module.
8. LCD as claimed in claim 1, wherein the composition of this red filter layer comprises PR254, PR177 and three kinds of pigment of PY150.
9. LCD as claimed in claim 1, wherein this LCD is suitable for showing red picture, and the y coordinate values of colourity on CIE 1931 chromaticity coordinatess that should the redness picture be Ry ', wherein Ry '≤0.335.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2008100917621A CN101256311B (en) | 2008-04-14 | 2008-04-14 | Lcd |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100917621A CN101256311B (en) | 2008-04-14 | 2008-04-14 | Lcd |
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| CN101256311A CN101256311A (en) | 2008-09-03 |
| CN101256311B true CN101256311B (en) | 2011-03-16 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101944335B (en) * | 2009-07-07 | 2013-05-08 | 深圳Tcl新技术有限公司 | Optical unit, color processing method and LCD (Liquid Crystal Display) display device adopting color processing method |
| CN107622744A (en) * | 2017-08-22 | 2018-01-23 | 四川长虹电器股份有限公司 | A kind of visual testing method of liquid crystal television screen colorimetric properties |
| CN115561931B (en) * | 2022-08-23 | 2024-04-09 | 京东方科技集团股份有限公司 | Quantum dot backlight module, backlight device and manufacturing method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1734328A (en) * | 2004-08-10 | 2006-02-15 | 奇菱科技股份有限公司 | LED and back light module with LED |
| CN101008736A (en) * | 2006-01-25 | 2007-08-01 | 启萌科技有限公司 | Liquid crystal display device |
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2008
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1734328A (en) * | 2004-08-10 | 2006-02-15 | 奇菱科技股份有限公司 | LED and back light module with LED |
| CN101008736A (en) * | 2006-01-25 | 2007-08-01 | 启萌科技有限公司 | Liquid crystal display device |
Non-Patent Citations (1)
| Title |
|---|
| JP特开2002-372709A 2002.12.26 |
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