CN104423090A - Display device - Google Patents

Display device Download PDF

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Publication number
CN104423090A
CN104423090A CN201310376044.XA CN201310376044A CN104423090A CN 104423090 A CN104423090 A CN 104423090A CN 201310376044 A CN201310376044 A CN 201310376044A CN 104423090 A CN104423090 A CN 104423090A
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blue
coordinate
energy
green
equation
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CN201310376044.XA
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CN104423090B (en
Inventor
黄士展
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Innolux Corp
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Innolux Display Corp
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Priority to CN201310376044.XA priority Critical patent/CN104423090B/en
Priority to CN201710822543.5A priority patent/CN107561781B/en
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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133621—Illuminating devices providing coloured light
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133624—Illuminating devices characterised by their spectral emissions

Abstract

A display device comprises a display panel. The display panel emits a green light ray when displaying a green picture at the highest gray level, the green light ray has green energy and a green color point, the display panel emits a blue light ray when displaying a blue picture at the highest gray level, the blue light ray has blue energy and a blue color point, the ratio of the green energy to the blue energy ranges from 0.7 to 1.5, the green color point corresponds to a CIE1931xy chromaticity coordinate, the coordinate of the green color point ranges from an equation y=-48.85x2+21.987x-1.7766 to an equation y=-48.85x2+27.849x-3.2717, and the y coordinate ranges from 0.68 to 0.72. The display device has a high color range and excellent display quality.

Description

Display device
Technical field
The invention relates to a kind of display device, especially in regard to a kind of display device with high colour gamut and better display color quality.
Background technology
Along with the progress of science and technology, flat display apparatus is used in various field widely, especially liquid crystal indicator, because having that build is frivolous, low power consumption and the advantageous characteristic such as radiationless, gradually replace conventional cathode ray tube display device, and be applied in the electronic product of numerous species, such as mobile phone, portable multimedia device, notebook computer, panel computer and other display etc.
Liquid crystal indicator mainly comprises a display panels (LCD Panel) and a backlight module module (BacklightModule).Wherein, display panels has a thin film transistor base, a colored optical filtering substrates and is located in liquid crystal layer between two substrates, and two substrates and liquid crystal layer can form the pixel that a plurality of array is arranged.In addition, backlight module can emit beam through display panels, and forms an image via each pixel display color of display panels.
In the design of display device, color taste is a very important design factor, and it specifically can be presented by chromaticity coordinate, such as a display panel, its light sent may correspond to in a CIE1931 chromaticity coordinate, and in chromaticity coordinate, three primary colors (blue, green and red) all have the color dot of its correspondence, i.e. three summits of chromatic triangle.At present comparatively universal chromaticity specification is sRGB, and the coordinate of its blue color point in CIE1931 chromaticity coordinate is (0.15,0.06), and the coordinate of green color point is (0.3,0.6), and the coordinate of red color point is (0.64,0.33).If it is too many that three primary colors color dot departs from sRGB standard colors point coordinate, then the image color representing display panel is lost genuine possibility and makes picture poor display, so that the quality of user's viewing reduces.In addition, high colour gamut (high color gamut) represents display device and can demonstrate more Color Range, one of target of Ye Shige great producer active pursuit.
Therefore, how to provide a kind of display device, can have high colour gamut and better display quality and improving product competitive power, real is one of current important topic simultaneously.
Summary of the invention
Because above-mentioned problem, object of the present invention is for providing a kind of have high colour gamut and better display quality and can the display device of improving product competitive power.
For reaching above-mentioned purpose, a display panel is comprised according to a kind of display device of the present invention, display panel launches a green light when most high gray (be 255 GTGs with 8-bit color range) shows a green picture, green light has a green energy and a green color point, display panel launches a blue ray when most high gray shows a blue picture, blue ray has a blue energy and a blue color point, green energy and blue energy ratio are between 0.7 and 1.5, green color point corresponds in CIE1931xy chromaticity coordinate, green color point coordinate range is between equation y=-48.85x 2+ 21.987x – 1.7766 and equation y=-48.85x 2between+27.849x – 3.2717, y coordinate is between 0.68 and 0.72.
In one embodiment, the ratio of green energy and blue energy is more between 0.7 and 1.2.
In one embodiment, the ratio of green energy and blue energy is more between 0.75 and 1.1.
In one embodiment, display panel launches a red light when most high gray shows a red picture, red light has a red energy and a red color point, red energy and blue energy ratio are between 1.2 and 2.6, and red color point corresponds in CIE1931xy chromaticity coordinate, red color point coordinate range is between equation y=-2.021x 2+ 2.1871x – 0.2218 and equation y=-2.021x 2between+2.1871x – 0.2618, x coordinate is between 0.66 and 0.70.
In one embodiment, the ratio of red energy and blue energy is more between 1.2 and 1.7.
In one embodiment, the ratio of red energy and blue energy is more between 1.25 and 1.6.
In one embodiment, blue light color dot corresponds in CIE1931xy chromaticity coordinate, and blue color point coordinate range is between equation y=-168.72x 2+ 50.312x – 3.635 and equation y=-168.72x 2between+63.81x – 5.9174, y coordinate is between 0.04 and 0.08.
In one embodiment, the ratio of green energy and blue energy is more between 1.0 and 1.5.
In one embodiment, the ratio of red energy and blue energy is more between 2.0 and 2.6.
In one embodiment, the red energy of light and the ratio of blue energy are more between 2.1 and 2.5.
In one embodiment, green color point coordinate range is more between equation y=-48.85x 2+ 23.452x – 2.1174 and equation y=-48.85x 2between+26.383x – 2.8649, y coordinate is more between 0.69 and 0.71.
In one embodiment, red color point coordinate range is more between equation y=-2.021x 2+ 2.1871x – 0.2318 and equation y=-2.021x 2between+2.1871x – 0.2518, x coordinate is more between 0.67 and 0.69.
In one embodiment, blue color point coordinate range is more between equation y=-168.72x 2+ 53.687x – 4.155 and equation y=-168.72x 2between+60.436x – 5.2962, y coordinate is between 0.05 and 0.07.
In one embodiment, green color point corresponds in CIE1976u'v' chromaticity coordinate, and the u' coordinate range of green color point is between 0.05 and 0.1, and v' coordinate is greater than 0.55.
In one embodiment, red color point corresponds in CIE1976u'v' chromaticity coordinate, and the u' coordinate range of red color point is between 0.5 and 0.55, and v' coordinate is greater than 0.5.
In one embodiment, blue color point corresponds in CIE1976u'v' chromaticity coordinate, and the u' coordinate of blue color point is between 0.15 and 0.2, and v' coordinate is between 0.1 and 0.2.
From the above, in display device of the present invention, display panel launches a green light when most high gray (be 255 GTGs with 8-bit color range) shows a green picture, green light has a green energy and a green color point, display panel launches a blue ray when most high gray shows a blue picture, blue ray has a blue energy and a blue color point, green energy and blue energy ratio are between 0.7 and 1.5, green color point corresponds in CIE1931xy chromaticity coordinate, green color point coordinate range is between equation y=-48.85x 2+ 21.987x – 1.7766 and equation y=-48.85x 2between+27.849x – 3.2717, y coordinate is between 0.68 and 0.72.By this, above-mentioned color dot scope meets the color designs close to sRGB specification, and to extend toward high colour gamut direction with tone in fact with the color dot of sRGB specification, makes display device of the present invention have high colour gamut and better display quality and can improving product competitive power.
Accompanying drawing explanation
Figure 1A is the schematic diagram of a kind of display device of present pre-ferred embodiments.
Figure 1B is the schematic diagram of the display panel of Figure 1A.
Fig. 2 is the intensity spectrum schematic diagram of the light passing display panel.
The schematic diagram of the CIE1931xy chromaticity coordinate that the light that Fig. 3 A launches for display panel of the present invention is corresponding.
Fig. 3 B, Fig. 3 C and Fig. 3 D are respectively the enlarged diagram of region O, P, Q of Fig. 3 A.
The schematic diagram of the CIE1976u'v' chromaticity coordinate that the light that Fig. 4 launches for display panel of the present invention is corresponding.
Drawing reference numeral:
1: display device
11: display panel
111: first substrate
112: second substrate
1121: chromatic filter layer
113: liquid crystal layer
12: backlight module
A1 ~ F1, A2 ~ F2: equation
O, P, Q: region
Embodiment
Hereinafter with reference to correlative type, a kind of display device according to present pre-ferred embodiments is described, wherein identical element is illustrated with identical reference marks.
Please refer to shown in Figure 1A and Figure 1B, wherein, Figure 1A is the schematic diagram of a kind of display device 1 of present pre-ferred embodiments, and Figure 1B is the schematic diagram of the display panel 11 of Figure 1A.
Display device 1 comprises display panel 11 and a backlight module 12, and display panel 11 and backlight module 12 are oppositely arranged.In this, display panel 11 is a display panels, and it comprises first substrate 111, second substrate 112 and a liquid crystal layer 113.First substrate 111 is such as a thin film transistor base, and second substrate 112 is such as a colored optical filtering substrates, and liquid crystal layer 113 is then folded between first substrate 111 and second substrate 112.Wherein, first substrate 111 and second substrate 112 can use glass substrate, transparent acrylic substrate or flexible base plate (flexible substrate), or use touch base plate.In the present embodiment, second substrate 112 comprises a chromatic filter layer 1121, and chromatic filter layer 1121 comprises a blue filter portion, a green filter portion and a red filter portion (figure does not show).When the blue filter portion of the light penetration chromatic filter layer 1121 that the backlight of backlight module 12 sends, it can form the blue energy of the light of display panel 11, and can be presented by the blue light frequency spectrum of light; When the light penetration green filter portion that the backlight of backlight module 12 sends, it can form the green energy of the light of display panel 11, and can be presented by the green glow frequency spectrum of light; When the light penetration red filter portion that the backlight of backlight module 12 sends, it can form the red energy of the light of display panel 11, and can be presented by the ruddiness frequency spectrum of light.In the present embodiment, be positioned at second substrate 112 for chromatic filter layer 1121, in other embodiments, chromatic filter layer 1121 can be arranged on first substrate 111.
Please refer to shown in Fig. 2, it is the intensity spectrum schematic diagram of the light passing display panel 11.Wherein, the intensity of the longitudinal axis is arbitrary unit.
As shown in Figure 2, intensity spectrum comprises a green glow frequency spectrum, a blue light frequency spectrum and a ruddiness frequency spectrum.Green glow frequency spectrum refers to the frequency spectrum of the gained when display panel 11 only shows the picture of the most high gray of green (be 255 GTGs with 8-bit color range), ruddiness frequency spectrum refers to the frequency spectrum of the gained when display panel 11 only shows the picture of the most high gray of redness (be 255 GTGs with 8-bit color range), and blue light frequency spectrum refers to the frequency spectrum of the gained when display panel 11 only shows the picture of the most high gray of blueness (be 255 GTGs with 8-bit color range).
In this, green light has a green energy and a green color point, green energy is a corresponding green spectral integral area (i.e. green spectral area under a curve), red light has a red energy and a red color point, red energy is a corresponding red spectral integral area (i.e. red spectral area under a curve), and green light has a green energy and a green color point, blue energy is a corresponding blue spectral integral area (i.e. blue spectral area under a curve).Therefore, the account form of the blueness of display panel 11, green, red light energy is:
Blue light energy: B = ∫ 380 780 BLU ( λ ) * BCF ( λ ) * CELL ( λ ) dλ
Green energy: G = ∫ 380 780 BLU ( λ ) * GCF ( λ ) * CELL ( λ ) dλ
Red energies: R = ∫ 380 780 BLU ( λ ) * RCF ( λ ) * CELL ( λ ) dλ
Wherein, BLU(λ) represent the energy distribution frequency spectrum of backlight, BCF(λ) represent blue filter portion penetrate frequency spectrum, GCF(λ) represent green filter portion penetrate frequency spectrum, RCF(λ) represent red filter portion penetrate frequency spectrum, CELL(λ) represent display panel 11 deduct chromatic filter layer (CF) after liquid crystal panel penetrate frequency spectrum, λ is wavelength, 380 and 780 refer to the wavelength coverage calculating this integration, it is that the blue light of its integration gained, green glow, Red energies unit are light watt so that how rice (nm) is for unit.As from the foregoing, change backlight BLU(λ by Separate designs), the filter unit CF(λ of each color) or liquid crystal penetrate frequency spectrum CELL(λ) or the difference of collocation mutually, the energy variation adjusting each color, to meet the white color point specification of design requirement, makes display device 1 have preferably display quality and improving product competitive power.Therefore, along with the difference of white color point specification, the colour planning of RGB will be different, and the namely design of RGB color dot and energy proportion also can be different.Therefore, the present invention wishes that ratio through scientific adjustment RGB energy is to control the variation of color dot, to reach the white color point specification of design requirement.
Please refer to shown in Fig. 3 A, the schematic diagram of the CIE1931xy chromaticity coordinate that its light launched for display panel 11 of the present invention is corresponding.Wherein, on the line of the spectrum locus line of CIE1931 chromatic diagram with in scope, belong in esse color, be real look (real color), otherwise, in fact chroma point outside colourity spectrum locus line does not exist, and is false colour (imaginary color).
In CIE1931xy chromaticity coordinate, in order to meet the color designs close to sRGB specification, to extend toward high colour gamut direction (namely extending outside green color point homochromy in fact of sRGB is transferred to) with the same in fact tone of the green color point with sRGB specification (hue), display panel 11 is made to have high colour gamut and better display quality, display device 1 of the present invention is design, green coloured light energy measured by the green light sent when most high gray (such as 255 GTGs) shows green picture by display panel 11, and in the blue coloured light energy of blue ray that sends when most high gray (such as 255 GTGs) shows blue picture of display panel 11, that the ratio of control green energy and blue energy is between 0.7 and 1.5, the green color point that then display panel 11 sends corresponds in the real color range of CIE1931xy chromaticity coordinate, and green color point coordinate range is between equation y=-48.85x 2+ 21.987x – 1.7766(equation A1) and equation y=-48.85x 2+ 27.849x – 3.2717(equation B1) between, and y coordinate is between 0.68 and 0.72.Except the green tone maintained close to sRGB specification except display panel 11 can be made, this scope compared to the green point of NTSC closer to the position of 550nm wavelength on spectrum locus line, because the sensitivity of human eye to the light of 550nm wavelength is the highest, the penetrance of display therefore can be promoted.
In addition, in CIE1931xy chromaticity coordinate, in order to meet the color designs close to sRGB specification, to extend toward high colour gamut direction (namely extending outside red color point homochromy in fact of sRGB is transferred to) with tone in fact with the red color point with sRGB specification, display panel 11 is made to have high colour gamut and better display quality, display device 1 of the present invention also designs, red coloured light energy measured by red light that red picture sends is shown in most high gray (such as 255 GTGs) by display panel 11, and show in the blue coloured light energy of the blue ray that blue picture sends by display panel 11 in most high gray (such as 255 GTGs), that the ratio of control red energy and blue energy is between 1.2 and 2.6, the red color point that then display panel 11 sends corresponds in the real color range of CIE1931xy chromaticity coordinate, red color point coordinate range is between equation y=-2.021x 2+ 2.1871x – 0.2218(equation C1) and equation y=-2.021x 2+ 2.1871x – 0.2618(equation D1) between, and x is between 0.66 and 0.70.Except the red tone maintained close to sRGB specification except making display panel 11, the lifting of excitation makes color performance more bright-coloured.
In addition, in CIE1931xy chromaticity coordinate, in order to meet the color designs of sRGB specification, with the blue essence color dot close to sRGB specification, display panel 11 is made to have high colour gamut and better display quality, display device 1 of the present invention is design, blue coloured light energy measured by the blue ray sent when most high gray (such as 255 GTGs) shows blue picture by display panel 11, and the blue color point that display panel 11 sends corresponds in the real color range of CIE1931xy chromaticity coordinate, blue color point coordinate range is between equation y=-168.72x 2+ 50.312x – 3.635(equation E1) and equation y=-168.72x 2+ 63.81x – 5.9174(equation F1) between, y coordinate is between 0.04 and 0.08.
Because display application is extensive, for Different factor such as different regional ethnic groups and size dimensions, have different color dot designs.Therefore, if when the white point of display wishes to be set in higher color temperature, in CIE1931xy chromaticity coordinate, in order to meet the color designs close to sRGB specification, to extend toward high colour gamut direction (namely extending outside green point homochromy in fact of sRGB is transferred to) with tone in fact with the green point with sRGB specification, display panel 11 is made to have high colour gamut and better display quality, display device 1 of the present invention is design, green coloured light energy measured by the green light sent when most high gray (such as 255 GTGs) shows green picture by display panel 11, and display panel 11 shows in the blue coloured light energy of the blue ray that blue picture sends in most high gray (such as 255 GTGs), that the ratio of control green energy and blue energy is between 0.7 and 1.2, the green color point that then display panel 11 sends corresponds in the real color range of CIE1931xy chromaticity coordinate, and green color point coordinate range is between equation-48.85x 2+ 21.987x – 1.7766(equation A1) and equation y=-48.85x 2+ 27.849x – 3.2717(equation B1) between, and y is between 0.68 and 0.72.Preferably, the ratio of green energy and blue energy is more between 0.75 and 1.1, and as shown in the enlarged drawing of Fig. 3 B, green color point coordinate range is more between equation y=-48.85x 2+ 23.452x – 2.1174(equation A2) and equation y=-48.85x 2+ 26.383x – 2.8649(equation B2) between, y coordinate is more between 0.69 and 0.71.Except the green tone maintained close to sRGB specification except display panel 11 can be made, this scope compared to the green point of NTSC closer to the position of 550nm wavelength on spectrum locus line, because the sensitivity of human eye to the light of 550nm wavelength (pure green glow) is the highest, the penetrance of display therefore can be promoted.
In addition, in CIE1931xy chromaticity coordinate, in order to meet the color designs close to sRGB specification, to extend toward high colour gamut direction (namely extending outside the redness point close to sRGB homochromy is in fact transferred to) with tone in fact with the redness point with sRGB specification, display panel 11 is made to have high colour gamut and better display quality, display device 1 of the present invention is design, red coloured light energy measured by the red light sent when most high gray (such as 255 GTGs) shows red picture by display panel 11, and display panel 11 shows in the blue coloured light energy of the blue ray that blue picture sends in most high gray (such as 255 GTGs), that the ratio of control red energy and blue energy is between 1.2 and 1.7, the red color point that then display panel 11 sends corresponds in the real color range of CIE1931xy chromaticity coordinate, and red color point coordinate range is between equation y=-2.021x 2+ 2.1871x – 0.2218(equation C1) and equation y=-2.021x 2+ 2.1871x – 0.2618(equation D1) between, x coordinate is between 0.66 and 0.70.Preferably, the ratio of red energy and blue energy is more between 1.25 and 1.6, and as shown in the enlarged drawing of Fig. 3 C, red color point coordinate range is more between equation y=-2.021x 2+ 2.1871x – 0.2318(equation C2) and equation y=-2.021x 2+ 2.1871x – 0.2518(equation D2) between, x coordinate is more between 0.67 and 0.69.Except the red tone maintained close to sRGB specification except display panel 11 can be made, because human eye is comparatively obvious to the color distortion degree identification of redness, therefore promote compared to the excitation of NTSC or sRGB redness color is showed more bright-coloured.
In addition, in CIE1931xy chromaticity coordinate, in order to meet the color designs close to sRGB specification, with the homochromy in fact toning point of the blueness close to sRGB specification, display panel 11 is made to have high colour gamut and better display quality, display device 1 of the present invention is design, blue coloured light energy measured by the blue ray sent when most high gray (such as 255 GTGs) shows blue picture by display panel 11, and the blue color point that display panel 11 sends corresponds in the real color range of CIE1931xy chromaticity coordinate, blue color point coordinate range is between equation y=-168.72x 2+ 50.312x – 3.635(equation E1) and equation y=-168.72x 2+ 63.81x – 5.9174(equation F1) between, x coordinate is between 0.04 and 0.08.Preferably, as shown in the enlarged drawing of Fig. 3 D, blue color point coordinate range is more between equation y=-168.72x 2+ 53.687x – 4.155(equation E2) and equation y=-168.72x 2+ 60.436x – 5.2962(equation F2) between, y coordinate is more between 0.05 and 0.07.
In in the case, the x coordinate that this light corresponds to the white point of CIE1931xy chromaticity coordinate is in 0.28 ± 0.010, and y coordinate is in 0.29 ± 0.010.In other words, the white point coordinates that light corresponds to CIE1931xy chromaticity coordinate is (0.28,0.29), and the mobility scale of x and the y coordinate of white point is all in ± 0.010, and the RGB energy Ratios of its correspondence is respectively: 0.7≤G/B≤1.2 and 1.2≤R/B≤1.7.
In addition, please refer to shown in Fig. 4, the schematic diagram of the CIE1976u'v' chromaticity coordinate that its light launched for display panel 11 of the present invention is corresponding.
As shown in Figure 4, in order to make the coloured light by display panel 11 emitted light is measured under the condition of most high gray (such as 255 GTGs) have preferably color uniformity, the present invention also converts by CIE1931xy chromaticity coordinate the color dot meeting above-mentioned energy Ratios (G/B, R/B) scope to CIE1976u'v' chromaticity coordinate.Wherein, in CIE1976u'v' chromaticity coordinate, in order to meet the color designs close to sRGB specification, with the green color point with sRGB specification, red color point and blue color point are in fact with tone and toward the extension of high colour gamut direction, display panel 11 is made to have high colour gamut and better display quality, this green light corresponds in CIE1976u'v' chromaticity coordinate, and the u' coordinate range of green color point is between 0.05 and 0.1, v' coordinate is greater than 0.55, this red light corresponds in CIE1976u'v' chromaticity coordinate, and the u' coordinate range of red color point is between 0.5 and 0.55, v' coordinate is greater than 0.5, and this blue ray corresponds in CIE1976u'v' chromaticity coordinate, and the u' coordinate of blue color point is between 0.15 and 0.2, v' coordinate is between 0.1 and 0.2.From CIE1976u'v' chromaticity coordinate, red chromaticity range obviously extends toward high colour gamut, because the color distortion degree identification of human eye to redness is comparatively obvious, therefore in the design, the excitation of redness is promoted, the color of human eye perceives display panel can be made more bright-coloured, and display frame quality also more promotes.
Because coloured light energy frequency spectrum is by design filter unit CF(λ) penetrate frequency spectrum to adjust, so adjust energy variation by the material category (such as R254, R177, G7, G36, G58, Y150, Y138, Y139, B15:6 etc.) and percentage by weight thereof adjusting filter unit.That such as can design blue color filter layer penetrates spectrum peak between 440nm to 460nm, green color filter penetrate spectrum peak between 500nm to 550nm, and adjust the ratio of the green energy of display panel 11 when most high gray relative to blue light energy between 0.7 to 1.2, and the ratio of red energy and this blue energy is between 1.2 and 1.7, green color point coordinate is made to correspond to the scope of CIE1931 chromaticity coordinate between equation y=-48.85x 2+ 21.987x – 1.7766(equation A1) and equation y=-48.85x 2+ 27.849x – 3.2717(equation B1) between, and y coordinate between 0.68 and 0.72, red color point coordinate range is between equation y=-2.021x 2+ 2.1871x – 0.2218(equation C1) and equation y=-2.021x 2+ 2.1871x – 0.2618(equation D1) between, and x coordinate is between 0.66 and 0.70, and blue color point coordinate range is between equation y=-168.72x 2+ 50.312x – 3.635(equation E1) and equation y=-168.72x 2+ 63.81x – 5.9174(equation F1) between, and y coordinate is between 0.04 and 0.08.In addition, in meeting above-mentioned energy Ratios, green light corresponds in CIE1976u'v' chromaticity coordinate, and the u' coordinate range of green color point is between 0.05 and 0.1, v' coordinate is greater than 0.55, red light corresponds in CIE1976u'v' chromaticity coordinate, and the u' coordinate range of red color point is between 0.5 and 0.55, v' coordinate is greater than 0.5, and blue ray corresponds in CIE1976u'v' chromaticity coordinate, and the u' coordinate of blue color point is between 0.15 and 0.2, v' coordinate is between 0.1 and 0.2.By this, the light that display panel 11 can be made to launch and the same in fact tone of sRGB specification, and extend toward high colour gamut direction, make display panel 11 have high colour gamut and better display quality and improving product competitive power.
In addition, also by design backlight BLU(λ) adjust energy proportion.Such as, when backlight is the red kind with green fluorescent powder of blue led collocation, its backlight has a frequency spectrum, by changing material category or its percentage by weight of phosphor powder, or change the electric current of input backlight, can design the peak value of blue light roughly between 440nm to 460nm, the peak value of the radiation spectra of green fluorescent powder is roughly between 500nm to 550nm, and the peak value of the radiation spectra of red fluorescent powder is roughly between 600nm to 660nm; Or, such as, when backlight is blue led collocation yellow fluorescent powder, also by changing material category or its percentage by weight of phosphor powder, or change the electric current of input backlight, the peak value of its blue light waveform can roughly between 440nm to 460nm, the peak value of the radiation spectra of yellow fluorescent powder roughly between 550nm to 580nm, with the ratio of the green energy under the most high gray adjusting each color and blue light energy and Red energies and blue light energy.In addition, the liquid crystal panel that also can design different colours pixel penetrates frequency spectrum CELL(λ) or the mutual collocation of above-mentioned condition to adjust energy proportion.In addition, the energetic portions of the backlight of backlight module, by adjusting the species composition of its phosphor powder and ratio thereof to reach above-mentioned scope, makes display panel 11 have high colour gamut and better display quality and improving product competitive power.Wherein, phosphor powder such as can comprise sulfide phosphor powder, nitride phosphor powder or silicates phosphor powder etc.
In addition, because display application is extensive, for Different factor such as different regional ethnic groups and size dimensions, have different color dot designs.Therefore, if when the white point of display wishes to be set in the design of lower colour temperature, in CIE1931xy chromaticity coordinate, in order to meet the color designs close to sRGB specification, to extend toward high colour gamut direction (namely extending outside green point homochromy in fact of sRGB is transferred to) with tone in fact with the green point with sRGB specification, display panel 11 is made to have high colour gamut and better display quality, display device 1 of the present invention is design, green coloured light energy measured by the green light sent when most high gray (such as 255 GTGs) shows green picture by display panel 11, and display panel 11 shows in the blue coloured light energy of the blue ray that blue picture sends in most high gray (such as 255 GTGs), that the ratio of control green energy and blue energy is between 1.0 and 1.5, the green light that then display panel 11 sends corresponds in the real color range of CIE1931xy chromaticity coordinate, and green color point coordinate range is between equation-48.85x 2+ 21.987x – 1.7766(equation A1) and equation y=-48.85x 2+ 27.849x – 3.2717(equation B1) between, and y is between 0.68 and 0.72.Preferably, the ratio of green energy and blue energy is more between 1.1 and 1.4, and as shown in the enlarged drawing of Fig. 3 B, green color point coordinate range is more between equation y=-48.85x 2+ 23.452x – 2.1174(equation A2) and equation y=-48.85x 2+ 26.383x – 2.8649(equation B2) between, y coordinate is more between 0.69 and 0.71.Except the green tone maintained close to sRGB specification except display panel 11 can be made, this scope compared to the green point of NTSC closer to the position of 550nm wavelength on spectrum locus line, because the sensitivity of human eye to the light of 550nm wavelength (pure green glow) is the highest, the penetrance of display therefore can be promoted.
In addition, in CIE1931xy chromaticity coordinate, in order to meet the color designs close to sRGB specification, to extend toward high colour gamut direction (namely extending outside redness point homochromy in fact of sRGB is transferred to) with tone in fact with the redness point with sRGB specification, display panel 11 is made to have high colour gamut and better display quality, display device 1 of the present invention is design, red coloured light energy measured by the red light sent when most high gray (such as 255 GTGs) shows red picture by display panel 11, and display panel 11 shows in the blue coloured light energy of the blue ray that blue picture sends in most high gray (such as 255 GTGs), that the ratio of control red energy and blue energy is between 2.0 and 2.6, the red light that then display panel 11 sends corresponds in the real color range of CIE1931xy chromaticity coordinate, and red color point coordinate range is between equation y=-2.021x 2+ 2.1871x – 0.2218(equation C1) and equation y=-2.021x 2+ 2.1871x – 0.2618(equation D1) between, x coordinate is between 0.66 and 0.70.Preferably, the ratio of red energy and blue energy is more between 2.1 and 2.5, and as shown in the enlarged drawing of Fig. 3 C, red color point coordinate range is more between equation y=-2.021x 2+ 2.1871x – 0.2318(equation C2) and equation y=-2.021x 2+ 2.1871x – 0.2518(equation D2) between, x coordinate is more between 0.67 and 0.69.Except the red tone maintained close to sRGB specification except display panel 11 can be made, because human eye is comparatively obvious to the color distortion degree identification of redness, therefore promote compared to the excitation of NTSC or sRGB redness color is showed more bright-coloured.
In addition, in CIE1931xy chromaticity coordinate, in order to meet the color designs close to sRGB specification, with the homochromy in fact toning point of the blueness close to sRGB specification, display panel 11 is made to have high colour gamut and better display quality, display device 1 of the present invention is design, blue coloured light energy measured by the blue ray sent when most high gray (such as 255 GTGs) shows blue picture by display panel 11, and the blue ray that display panel 11 sends corresponds in the real color range of CIE1931xy chromaticity coordinate, blue color point coordinate range is between equation y=-168.72x 2+ 50.312x – 3.635(equation E1) and equation y=-168.72x 2+ 63.81x – 5.9174(equation F1) between, y coordinate is between 0.04 and 0.08.Preferably, as shown in the enlarged drawing of Fig. 3 D, blue color point coordinate range is more between equation y=-168.72x 2+ 53.687x – 4.155(equation E2) and equation y=-168.72x 2+ 60.436x – 5.2962(equation F2) between, y coordinate is more between 0.05 and 0.07.
In in the case, the x coordinate that this light corresponds to the white point of CIE1931xy chromaticity coordinate is in 0.313 ± 0.010, and y coordinate is in 0.329 ± 0.010.In other words, the white point coordinates that light corresponds to CIE1931xy chromaticity coordinate is (0.313,0.329), and the mobility scale of x and the y coordinate of white point is all in ± 0.010, and the RGB energy Ratios of its correspondence is respectively: 1.0≤G/B≤1.5 and 2.0≤R/B≤2.6.
In addition, shown in Fig. 4, in order to make the coloured light by display panel 11 emitted light is measured under the condition of most high gray (such as 255 GTGs) have preferably color uniformity, the present invention also converts by CIE1931xy chromaticity coordinate the color dot meeting above-mentioned energy Ratios (G/B, R/B) scope to CIE1976u'v' chromaticity coordinate.Wherein, in CIE1976u'v' chromaticity coordinate, in order to meet the color designs close to sRGB specification, with the green color point with sRGB specification, red color point and blue color point are in fact with tone and toward the extension of high colour gamut direction, display panel 11 is made to have high colour gamut and better display quality, green color point corresponds in CIE1976u'v' chromaticity coordinate, and the u' coordinate range of green color point is between 0.05 and 0.1, v' coordinate is greater than 0.55, red color point corresponds in CIE1976u'v' chromaticity coordinate, and the u' coordinate range of red color point is between 0.5 and 0.55, v' coordinate is greater than 0.5, and blue color point corresponds in CIE1976u'v' chromaticity coordinate, and the u' coordinate of blue color point is between 0.15 and 0.2, v' coordinate is between 0.1 and 0.2.From CIE1976u'v' chromaticity coordinate, red chromaticity range obviously extends toward high colour gamut, because the color distortion degree identification of human eye to redness is comparatively obvious, therefore in the design, the excitation of redness is promoted, the color of human eye perceives display panel can be made more bright-coloured, and display frame quality also more promotes.
Because energy is by design filter unit CF(λ) penetrate frequency spectrum to adjust, so adjust energy variation by the material category (such as R254, R177, G7, G36, G58, Y150, Y138, Y139, B15:6 etc.) and percentage by weight thereof adjusting filter unit.That such as can design blue color filter layer penetrates spectrum peak between 440nm to 460nm, green color filter penetrate spectrum peak between 500nm to 550nm, and adjust the ratio of the green energy of display panel 11 when most high gray relative to blue light energy between 1.0 to 1.5, and the ratio of red energy and this blue energy is between 2.0 and 2.6, make green color point coordinate range between equation y=-48.85x 2+ 21.987x – 1.7766(equation A1) and equation y=-48.85x 2+ 27.849x – 3.2717(equation B1) between, and y coordinate between 0.68 and 0.72, red color point coordinate range is between equation y=-2.021x 2+ 2.1871x – 0.2218(equation C1) and equation y=-2.021x 2+ 2.1871x – 0.2618(equation D1) between, and x coordinate is between 0.66 and 0.70, and blue color point coordinate range is between equation y=-168.72x 2+ 50.312x – 3.635(equation E1) and equation y=-168.72x 2+ 63.81x – 5.9174(equation F1) between, and y coordinate is between 0.04 and 0.08.In addition, in meeting above-mentioned energy Ratios, green light corresponds in CIE1976u'v' chromaticity coordinate, and the u' coordinate range of green color point is between 0.05 and 0.1, v' coordinate is greater than 0.55, red light corresponds in CIE1976u'v' chromaticity coordinate, and the u' coordinate range of red color point is between 0.5 and 0.55, v' coordinate is greater than 0.5, and blue ray corresponds in CIE1976u'v' chromaticity coordinate, and the u' coordinate of blue color point is between 0.15 and 0.2, v' coordinate is between 0.1 and 0.2.By this, the light that display panel 11 can be made to launch and the same in fact tone of sRGB specification, and extend toward high colour gamut direction, make display panel 11 have high colour gamut and better display quality and improving product competitive power.
Because coloured light energy frequency spectrum is by design filter unit CF(λ) penetrate frequency spectrum to adjust, so adjust energy variation by the material category (such as R254, R177, G7, G36, G58, Y150, Y138, Y139, B15:6 etc.) and percentage by weight thereof adjusting filter unit.That such as can design blue color filter layer penetrates spectrum peak between 440nm to 460nm, green color filter penetrate spectrum peak between 500nm to 550nm, and adjust the ratio of the green energy of display panel 11 when most high gray relative to blue light energy between 1.0 to 1.5, and the ratio of red energy and this blue energy is between 2.0 and 2.6, make the u' coordinate of green color point between 0.05 and 0.1, v' coordinate is greater than 0.55, the u' coordinate of red color point is between 0.5 and 0.55, v' coordinate is greater than 0.5, and the u' coordinate of blue color point is between 0.15 and 0.2, v' coordinate is between 0.1 and 0.2.By this, the same tone of three color dots of the light that display panel 11 can be made to launch and sRGB specification, and extending toward high colour gamut direction, makes display panel 11 have high colour gamut and better display quality and improving product competitive power.In addition, the energetic portions of the backlight of backlight module, by adjusting the species composition of its phosphor powder and ratio thereof to reach above-mentioned scope, makes display panel 11 have high colour gamut and better display quality and improving product competitive power.
In addition, also by design backlight BLU(λ) adjust energy proportion.Such as, when backlight is the red kind with green fluorescent powder of blue led collocation, its backlight has a frequency spectrum, by changing material category or its percentage by weight of phosphor powder, or change the electric current of input backlight, can design the peak value of blue light roughly between 440nm to 460nm, the peak value of the radiation spectra of green fluorescent powder is roughly between 500nm to 550nm, and the peak value of the radiation spectra of red fluorescent powder is roughly between 600nm to 660nm; Or, such as, when backlight is blue led collocation yellow fluorescent powder, also by changing material category or its percentage by weight of phosphor powder, or change the electric current of input backlight, the peak value of its blue light waveform can roughly between 440nm to 460nm, the peak value of the radiation spectra of yellow fluorescent powder roughly between 550nm to 580nm, with the ratio of the green energy under the most high gray adjusting each color and blue light energy and Red energies and blue light energy.In addition, the liquid crystal panel that also can design different colours pixel penetrates frequency spectrum CELL(λ) or the mutual collocation of above-mentioned condition to adjust energy proportion.In addition, the energetic portions of the backlight of backlight module, by adjusting the species composition of its phosphor powder and ratio thereof to reach above-mentioned scope, makes display panel 11 have high colour gamut and better display quality and improving product competitive power.Wherein, phosphor powder such as can comprise sulfide phosphor powder, nitride phosphor powder or silicate phosphor powder etc.
In addition, display panel 11 of the present invention also can be applied other technologies and have different change aspects, such as chromatic filter layer can be arranged at side (the color filter on array of electric crystal array film, COA) (TFT on CF on colored optical filtering substrates or by electric crystal array film is arranged at, also TOC or array on CF is called), do not limited.
In sum, in display device of the present invention, display panel launches a green light when most high gray (be 255 GTGs with 8-bit color range) shows a green picture, green light has a green energy and a green color point, display panel launches a blue ray when most high gray shows a blue picture, blue ray has a blue energy and a blue color point, green energy and blue energy ratio are between 0.7 and 1.5, green color point corresponds in CIE1931xy chromaticity coordinate, green color point coordinate range is between equation y=-48.85x 2+ 21.987x – 1.7766 and equation y=-48.85x 2between+27.849x – 3.2717, y coordinate is between 0.68 and 0.72.By this, above-mentioned color dot scope meets the color designs close to sRGB specification, and to extend toward high colour gamut direction with tone in fact with the color dot of sRGB specification, makes display device of the present invention have high colour gamut and better display quality and can improving product competitive power.
The foregoing is only illustrative, but not be restricted person.Anyly do not depart from spirit of the present invention and category, and to its equivalent modifications of carrying out or change, all should be contained in claim.

Claims (17)

1. a display device, is characterized in that, described display device comprises:
One display panel, it launches a green light when most high gray shows a green picture, and this green light has a green energy and a green color point, and it launches a blue ray when most high gray shows a blue picture, this blue ray has a blue energy and a blue color point
Wherein, this green energy and this blue energy ratio are between 0.7 and 1.5, and this green color point corresponds in CIE1931xy chromaticity coordinate, and this green color point coordinate range is between equation y=-48.85x 2+ 21.987x – 1.7766 and equation y=-48.85x 2between+27.849x – 3.2717, y coordinate is between 0.68 and 0.72.
2. display device as claimed in claim 1, it is characterized in that, the ratio of described green energy and this blue energy is more between 0.7 and 1.2.
3. display device as claimed in claim 2, it is characterized in that, the ratio of described green energy and this blue energy is more between 0.75 and 1.1.
4. display device as claimed in claim 1, it is characterized in that, described display panel launches a red light when most high gray shows a red picture, this red light has a red energy and a red color point, this red energy and this blue energy ratio are between 1.2 and 2.6, and this red color point corresponds in CIE1931xy chromaticity coordinate, this red color point coordinate range is between equation y=-2.021x 2+ 2.1871x – 0.2218 and equation y=-2.021x 2between+2.1871x – 0.2618, x coordinate is between 0.66 and 0.70.
5. display device as claimed in claim 4, it is characterized in that, the ratio of described red energy and this blue energy is more between 1.2 and 1.7.
6. display device as claimed in claim 5, it is characterized in that, the ratio of described red energy and this blue energy is more between 1.25 and 1.6.
7. display device as claimed in claim 1, is characterized in that, described blue color point corresponds in CIE1931xy chromaticity coordinate, and this blue color point coordinate range is between equation y=-168.72x 2+ 50.312x – 3.635 and equation y=-168.72x 2between+63.81x – 5.9174, y coordinate is between 0.04 and 0.08.
8. display device as claimed in claim 1, it is characterized in that, the ratio of described green energy and this blue energy is more between 1.0 and 1.5.
9. display device as claimed in claim 8, it is characterized in that, the ratio of described green energy and this blue energy is more between 1.1 and 1.4.
10. display device as claimed in claim 4, it is characterized in that, the ratio of described red energy and this blue energy is more between 2.0 and 2.6.
11. display device as claimed in claim 10, it is characterized in that, the ratio of described red energy and this blue energy is more between 2.1 and 2.5.
12. display device as claimed in claim 1, it is characterized in that, described green color point coordinate range is more between equation y=-48.85x 2+ 23.452x – 2.1174 and equation y=-48.85x 2between+26.383x – 2.8649, y coordinate is more between 0.69 and 0.71.
13. display device as claimed in claim 4, it is characterized in that, described red color point coordinate range is more between equation y=-2.021x 2+ 2.1871x – 0.2318 and equation y=-2.021x 2between+2.1871x – 0.2518, x coordinate is more between 0.67 and 0.69.
14. display device as claimed in claim 7, it is characterized in that, described blue color point coordinate range is more between equation y=-168.72x 2+ 53.687x – 4.155 and equation y=-168.72x 2between+60.436x – 5.2962, y coordinate is between 0.05 and 0.07.
15. display device as claimed in claim 1, is characterized in that, described green color point corresponds in CIE1976u'v' chromaticity coordinate, and the u' coordinate range of this green color point is between 0.05 and 0.1, and v' coordinate is greater than 0.55.
16. display device as claimed in claim 4, is characterized in that, described red color point corresponds in CIE1976u'v' chromaticity coordinate, and the u' coordinate range of this red color point is between 0.5 and 0.55, and v' coordinate is greater than 0.5.
17. display device as claimed in claim 1, is characterized in that, described blue color point corresponds in CIE1976u'v' chromaticity coordinate, and the u' coordinate of this blue color point is between 0.15 and 0.2, and v' coordinate is between 0.1 and 0.2.
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