CN105334672A - Liquid crystal display panel compensation structure and optical compensation method thereof - Google Patents
Liquid crystal display panel compensation structure and optical compensation method thereof Download PDFInfo
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- CN105334672A CN105334672A CN201510897812.5A CN201510897812A CN105334672A CN 105334672 A CN105334672 A CN 105334672A CN 201510897812 A CN201510897812 A CN 201510897812A CN 105334672 A CN105334672 A CN 105334672A
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- liquid crystal
- optical axis
- compensate film
- polarizing layer
- vertical orientation
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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
- G02F1/13363—Birefringent elements, e.g. for optical compensation
-
- 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
- G02F1/13363—Birefringent elements, e.g. for optical compensation
- G02F1/133631—Birefringent elements, e.g. for optical compensation with a spatial distribution of the retardation value
Abstract
The invention provides a liquid crystal display panel compensation structure which comprises a first polarized layer, a vertical orientation liquid crystal box, a second polarized layer, a double optical axis A- compensation film, a first single optical axis C- compensation film and a second single optical axis C- compensation film. The liquid crystal optical path difference LC delta ND of the vertical orientation liquid crystal box is [319.7, 342.7]nm, and the pretilt angle theta of liquid crystal molecules is [84 degrees, 90 degrees]. According to the value range of the in-plane optical path difference compensation value Ro of the double optical axis A- compensation film, 55 nm<=Ro<=81 nm, and according to the value range of the out-plane optical path difference compensation value Rth of the double optical axis-A compensation film, 208 nm<=Rth<=306 nm. According to the value range of the compensation value Rth of the first single optical axis C- compensation film and the second single optical axis C- compensation film, Y1<=Rth<=Y2. Y1=0.001596x2-1.32x+255.3, and Y2=-0.002968x2+0.9x+23.8, and x is the out-plane optical path difference compensation value Rth of the double optical axis A- compensation film. The compensation values are reasonably adjusted, the specific compensation structure and setting of the polaroid angle are in cooperation, and the dark state serious light leakage angle of a liquid crystal display panel can be adjusted to deflect from a near horizontal view angle area to a near vertical view angle area.
Description
Technical field
The present invention relates to technical field of liquid crystal display, particularly a kind of liquid crystal panel compensates framework and optical compensation method thereof.
Background technology
Along with constantly popularizing of display panels, more and more higher to the requirement of display panels display quality.In order to obtain higher liquid crystal light path difference, when liquid-crystal refractive-index is fixing, the thickness (cellgap) of liquid crystal can only be increased, the increase of liquid crystal consumption can be caused like this, because the cost of liquid crystal is very high, therefore liquid crystal consumption is more, and production cost is higher.
And liquid crystal light journey extent is not only related to the height of penetrance, also very large impact can be caused on dark-state light leak with great visual angle.For Thin Film Transistor (TFT) display panels (ThinFilmTransistorLCD, TFT-LCD), along with the viewing angle of TFT-LCD increases gradually, the contrast of picture constantly reduces, and the sharpness of picture also declines gradually.This is because the birefraction of liquid crystal molecule in liquid crystal layer changes along with viewing angle the result changed, and adopts wide viewing angle compensate film to compensate, effectively can reduce the light leak of dark-state picture, can increase substantially the contrast of picture in certain visual angle.Wherein the compensation principle of compensate film is generally revised by the phase differential that liquid crystal produces in different visual angles, allows the birefringence of liquid crystal molecule obtain symmetric compensation.
For different liquid crystal display mode, the compensate film of use is also different, and the compensate film that large-size liquid crystal television uses is for vertical orientation (VerticalAlignment, VA) display mode mostly.And for identical liquid crystal light path difference, if compensate film offset is different, then dark-state light leak is with great visual angle just different, contrast is also different.
Fig. 1 a and Fig. 1 b is for being that 296.5nm arranges in pairs or groups A-compensate film and C-compensate film offset in liquid crystal light path difference, use the double-deck cross-compound arrangement of double-deck C-compensate film and individual layer A-compensate film as compensating framework, corresponding dark-state light leak distribution and full viewing angle contrast's degree distribution plan.Can find out that the serious visual angle of dark-state light leak is closer to horizontal view angle by Fig. 1 a, and the region that the relative position of general spectators and TV determines close to horizontal view angle is more easily easily seen, so the contrast at these visual angles, sharpness having the greatest impact to viewing effect.And in sight because of being not easy close to the region of vertical angle of view, less on the impact of spectators.Along with the increase of television sizes, this effect can be more obvious.So be necessary that a dark-state light leak region is limited near nearly vertical angle of view.
Summary of the invention
The embodiment of the present invention provides a kind of display panels, and by reasonably adjusting offset, the angle that can adjust the dark-state light leak of liquid crystal panel serious deflects from region, nearly horizontal view angle toward region, nearly vertical angle of view; And effectively can weaken the dark-state light leak of liquid crystal panel on the whole and ensure that light leak concentrates in less scope.
The present invention there is a need to the optical compensation method providing a kind of display panels.
In view of the above problems, the invention provides a kind of liquid crystal panel and compensate framework, described liquid crystal panel compensates framework and comprises the first polarizing layer, vertical orientation liquid crystal cell, the second polarizing layer, the described first polarizing layer relative both sides that are arranged at described vertical orientation liquid crystal cell stacked with described second polarizing layer;
Described liquid crystal panel compensates framework and also comprises one deck two optical axis A-compensate film, one deck first uniaxial C-compensate film and one deck second uniaxial C-compensate film;
Described pair of optical axis A-compensate film is arranged between described vertical orientation liquid crystal cell and described first polarizing layer or between described vertical orientation liquid crystal cell and described second polarizing layer, and first, second uniaxial C-compensate film is arranged between described vertical orientation liquid crystal cell and described second polarizing layer or between described vertical orientation liquid crystal cell and described first polarizing layer; Or
Described pair of optical axis A-compensate film and described first uniaxial C-compensate film are arranged between described vertical orientation liquid crystal cell and described first polarizing layer or between described vertical orientation liquid crystal cell and described second polarizing layer, and described second uniaxial C-compensate film is arranged between described vertical orientation liquid crystal cell and described second polarizing layer or between described vertical orientation liquid crystal cell and described first polarizing layer; Wherein the first uniaxial C-compensate film is between described pair of optical axis A-compensate film and vertical orientation liquid crystal cell;
The liquid crystal light path difference LC Δ ND scope of described vertical orientation liquid crystal cell is [319.7,342.7] nm, and the pretilt theta scope of liquid crystal molecule is [85 °, 90 °]; In the face of described pair of optical axis A-compensate film, the span of optical path difference offset Ro is 55nm≤Ro≤81nm, and outside its face, the span of optical path difference offset Rth is 208nm≤Rth≤306nm; The span of the offset Rth of described first uniaxial C-compensate film and the second uniaxial C-compensate film is Y1≤Rth≤Y2; Wherein Y1, Y2 meet following formula:
Y1＝0.001596x
2-1.32x+255.3；
Y2=-0.002968x
2+ 0.9x+23.8, wherein x is the value of the outer optical path difference offset Rth of two optical axis A-compensate film.
Wherein, in the face of described pair of optical axis A-compensate film, outside optical path difference offset Ro and face, the scope of optical path difference offset Rth is obtained by following formula adjustment:
Ro＝(Nx-Ny)*d1，
Rth＝[(Nx+Ny)/2-Nz]*d1；
Wherein, Nx is the refractive index that described couple of optical axis A-compensates the X-direction of the largest refractive index provided in face, Ny is the refractive index that described couple of optical axis A-compensates Y-direction orthogonal with X-direction in face, Nz is the refractive index of described pair of optical axis A-compensate film thickness direction, and d1 is the thickness of described pair of optical axis A-compensate film.
Wherein, the angle that slow axis and two optical axis A-compensate film of described pair of optical axis A-compensate film are positioned at the absorption axle of first or second polarizing layer of described vertical orientation liquid crystal cell the same side is 90 degree.
Wherein, described liquid crystal panel compensates framework and also comprises the 3rd protective seam be positioned at outside described first polarizing layer and described second polarizing layer, and the material of the 3rd protective seam is Triafol T.
The invention provides a kind of liquid crystal panel and compensate framework, described liquid crystal panel compensates framework and comprises the first polarizing layer, vertical orientation liquid crystal cell, the second polarizing layer, the described first polarizing layer relative both sides that are arranged at described vertical orientation liquid crystal cell stacked with described second polarizing layer;
Described liquid crystal panel compensates framework and also comprises two-layer pair of optical axis A-compensate film, one deck first uniaxial C-compensate film and one deck second uniaxial C-compensate film;
Described two-layer pair of optical axis A-compensate film is arranged between described vertical orientation liquid crystal cell and described first polarizing layer or between described vertical orientation liquid crystal cell and described second polarizing layer, and first, second uniaxial C-compensate film is arranged between described vertical orientation liquid crystal cell and described second polarizing layer or between described vertical orientation liquid crystal cell and described first polarizing layer; Or
Described two-layer pair of optical axis A-compensate film and described first uniaxial C-compensate film are arranged between described vertical orientation liquid crystal cell and described first polarizing layer or between described vertical orientation liquid crystal cell and described second polarizing layer, and described second uniaxial C-compensate film is arranged between described vertical orientation liquid crystal cell and described second polarizing layer or between described vertical orientation liquid crystal cell and described first polarizing layer; Wherein the first uniaxial C-compensate film is two between optical axis A-compensate film and vertical orientation liquid crystal cell described in one;
The liquid crystal light path difference LC Δ ND scope of described vertical orientation liquid crystal cell is [319.7,342.7] nm, and the pretilt theta scope of liquid crystal molecule is [85 °, 90 °]; In the face of described two-layer pair of optical axis A-compensate film, the span of optical path difference sum offset Ro is 55nm≤Ro≤81nm, and outside its face, the span of optical path difference offset Rth is 208nm≤Rth≤306nm; The span of the offset Rth of described first uniaxial C-compensate film and the second uniaxial C-compensate film is Y1≤Rth≤Y2; Wherein Y1, Y2 meet following formula:
Y1＝0.001596x
2-1.32x+255.3；
Y2＝-0.002968x
2+0.9x+23.8。
Wherein, in the face of two optical axis A-compensate film described in each, the scope of optical path difference offset Ro and the outer optical path difference offset Rth in face is by following formula adjustment acquisition:
Ro＝(Nx-Ny)*d1，
Rth＝[(Nx+Ny)/2-Nz]*d1；
Wherein, Nx is the refractive index that described couple of optical axis A-compensates the X-direction of the largest refractive index provided in face, Ny is the refractive index that described couple of optical axis A-compensates Y-direction orthogonal with X-direction in face, Nz is the refractive index of described pair of optical axis A-compensate film thickness direction, and d1 is the thickness of described pair of optical axis A-compensate film.
Wherein, the absorption axle clamp angle that slow axis and two optical axis A-compensate film of two optical axis A-compensate films of described every one deck are positioned at first or second light polarizing film of described vertical orientation liquid crystal cell the same side is 90 degree.
The invention provides a kind of optical compensation method of described liquid crystal panel framework, described method comprises:
Choose the liquid crystal light path difference LC Δ ND scope of described vertical orientation liquid crystal cell for [319.7,342.7] nm, the pretilt theta scope of liquid crystal molecule is [85 °, 90 °];
Adjust described couple of optical axis A-and compensate the span of optical path difference offset Ro in face at 55nm≤Ro≤81nm;
Outside the face adjusting described pair of optical axis A-compensate film, the span of optical path difference offset Rth is at 208nm≤Rth≤306nm; And
Adjust the span of the offset Rth of described first uniaxial C-compensate film and the second uniaxial C-compensate film at Y1≤Rth≤Y2; Wherein Y1, Y2 meet following formula:
Y1＝0.001596x
2-1.32x+255.3；
Y2=-0.002968x
2+ 0.9x+23.8, x are the value of the outer optical path difference offset Rth of two optical axis A-compensate film.
Wherein, adjust the described couple of optical axis A-when compensating the span of optical path difference offset Ro in face and adjust the span of the outer optical path difference offset Rth in face of described pair of optical axis A-compensate film, carry out adjustment acquisition by following formula:
Ro＝(Nx-Ny)*d1，
Rth＝[(Nx+Ny)/2-Nz]*d1；
Wherein, wherein, Nx is the refractive index that described couple of optical axis A-compensates the X-direction of the largest refractive index provided in face, Ny is the refractive index that described couple of optical axis A-compensates Y-direction orthogonal with X-direction in face, Nz is the refractive index of described pair of optical axis A-compensate film thickness direction, and d1 is the thickness of described pair of optical axis A-compensate film.
Wherein, adjust described couple of optical axis A-and compensate in the step of the span of face offset Ro and Rth, when described pair of optical axis A-compensate film is double-deck, the span of described Ro and Rth is the offset sum of double-deck two optical axis A-compensate film.
Compared to prior art, in the present invention, by reasonably arranging the offset of two optical axis A-compensate film and uniaxial C-compensate film, angle serious for the dark-state light leak of liquid crystal panel can be deflected from region, nearly horizontal view angle toward region, nearly vertical angle of view; And effectively can weaken the dark-state light leak of liquid crystal panel on the whole and ensure that light leak concentrates in less scope.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 a is the luminance contour distribution plans such as the dark-state light leak of liquid crystal panel after existing a kind of individual layer compensate film compensates.
Fig. 1 b is the contrast contoured profile figure such as the full visual angle of liquid crystal panel as shown in Figure 1a.
Fig. 2-Fig. 9 is the structural representation that liquid crystal panel of the present invention compensates framework one to eight.
Figure 10 is liquid crystal panel of the present invention compensation framework one to eight is 319.7nm in liquid crystal light path difference, and pretilt theta is 89 °, and light leak amount when dark-state light leak concentrates on great visual angle is with offset changing trend diagram.
Figure 11 is liquid crystal panel of the present invention compensation framework one to eight is 324.3nm in liquid crystal light path difference, and pretilt theta is 89 °, and light leak amount when dark-state light leak concentrates on great visual angle is with offset changing trend diagram.
Figure 12 is liquid crystal panel of the present invention compensation framework one to eight is 333.6nm in liquid crystal light path difference, and pretilt theta is 89 °, and light leak amount when dark-state light leak concentrates on great visual angle is with offset changing trend diagram.
Figure 13 is liquid crystal panel of the present invention compensation framework one to eight is 342.7nm in liquid crystal light path difference, and pretilt theta is 89 °, and light leak amount when dark-state light leak concentrates on great visual angle is with offset changing trend diagram.
Figure 14 a is the luminance contour such as the dark-state light leak distribution of the liquid crystal panel after compensating in a specific embodiment.
Figure 14 b is the contrast contoured profile figure such as the full visual angle of liquid crystal panel as shown in figures 14a.
Figure 15 a is the luminance contour such as the dark-state distribution of the liquid crystal panel after compensating in another specific embodiment.
Figure 15 b is the contrast contoured profile figure such as the full visual angle of liquid crystal panel as shown in fig. 15 a.
Figure 16 a is the luminance contour such as the dark-state distribution of the liquid crystal panel after compensating in another specific embodiment.
Figure 16 b is the contrast contoured profile figure such as the full visual angle of liquid crystal panel as illustrated in fig 16 a.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Liquid crystal panel of the present invention compensates framework applications in liquid crystal indicator, and the described backlight module of described liquid crystal panel and liquid crystal indicator is oppositely arranged, and described backlight module provides display light source to described liquid crystal panel, to make described liquid crystal panel show image.
Refer to figure Fig. 2, liquid crystal panel of the present invention compensates in framework one, described liquid crystal panel compensates framework and comprises the first polarizing layer 11, vertical orientation liquid crystal cell 15, second polarizing layer 18, the described first polarizing layer 11 relative both sides that are arranged at described vertical orientation liquid crystal cell 15 stacked with described second polarizing layer 18.Described liquid crystal panel compensates framework and also comprises one deck two optical axis A-compensate film 12, one deck first uniaxial C-compensate film 16 and one deck second uniaxial C-compensate film 17.Wherein, the light of backlight module enters described liquid crystal panel compensation framework from the second polarizing layer 18.The material of described first polarizing layer 11 and the second polarizing layer 18 is polyvinyl alcohol (PVA).
In the present embodiment, described pair of optical axis A-compensate film 12 is arranged between described vertical orientation liquid crystal cell 15 and described first polarizing layer 11; First uniaxial C-compensate film 16, second uniaxial C-compensate film 17 is arranged between described vertical orientation liquid crystal cell 15 and described second polarizing layer 18.
Further, when described pair of optical axis A-compensate film and the first polarizing layer 11 are positioned at described vertical orientation liquid crystal cell the same side, the angle of the absorption axle of the first polarizing layer 11 of the slow axis of described pair of optical axis A-compensate film is 90 degree.That is the absorption axle of the first polarizing layer 11 is 90 degree, and the slow axis of described pair of optical axis A-compensate film is 0 degree.Further, the absorption axle of described first polarizing layer 11 is 90 degree, then the absorption axle of the second polarizing layer 18 is 0 degree, and namely the absorption axle clamp angle of described first polarizing layer 11 and the second polarizing layer 18 is 90 degree.
Refer to Fig. 3, liquid crystal panel of the present invention compensates in framework two, and compensate framework one difference with the invention described above liquid crystal panel and be, described pair of optical axis A-compensate film 12 is arranged between described vertical orientation liquid crystal cell 15 and described second polarizing layer 18; First uniaxial C-compensate film 16, second uniaxial C-compensate film 17 is arranged between described vertical orientation liquid crystal cell 15 and described first polarizing layer 11.Wherein, the angle of the absorption axle of the second polarizing layer 18 of the slow axis of described pair of optical axis A-compensate film is 90 degree.When the absorption axle of the second polarizing layer 18 is 90 degree, the slow axis of described pair of optical axis A-compensate film is 0 degree.Further, the absorption axle of described first polarizing layer 11 is 0 degree, then the absorption axle of the second polarizing layer 18 is 90 degree.
Refer to Fig. 4, liquid crystal panel of the present invention compensates in framework three, compensate framework one difference with the invention described above liquid crystal panel to be, described pair of optical axis A-compensate film 12 and described first uniaxial C-compensate film 16 are arranged between described vertical orientation liquid crystal cell 15 and described first polarizing layer 11, and described second uniaxial C-compensate film 17 is arranged between described vertical orientation liquid crystal cell 15 and described second polarizing layer 18.The angle of the absorption axle of the first polarizing layer 11 of the slow axis of wherein said pair of optical axis A-compensate film is 90 degree.The absorption axle of described first polarizing layer 11 is 90 degree, then the absorption axle of the second polarizing layer 18 is 0 degree.Wherein, the first uniaxial C-compensate film 117 is between described pair of optical axis A-compensate film 12 and vertical orientation liquid crystal cell 15.
Refer to Fig. 5, liquid crystal panel of the present invention compensates in framework four, compensate framework three difference with the invention described above liquid crystal panel to be, described pair of optical axis A-compensate film 12 and described first uniaxial C-compensate film 16 are arranged between described vertical orientation liquid crystal cell 15 and described second polarizing layer 18, and described second uniaxial C-compensate film 17 is arranged between described vertical orientation liquid crystal cell 15 and described first polarizing layer 11.The angle of the absorption axle of the second polarizing layer 18 of the slow axis of wherein said pair of optical axis A-compensate film is 90 degree.When the absorption axle of the second polarizing layer 18 is 90 degree, the slow axis of described pair of optical axis A-compensate film is 0 degree.The absorption axle of the second polarizing layer 18 for the absorption axle of the first polarizing layer 11 described in when 90 degree be 0 degree.
Refer to Fig. 6, liquid crystal panel of the present invention compensates in framework five, described liquid crystal panel compensates framework and comprises the first polarizing layer 21, vertical orientation liquid crystal cell 25, second polarizing layer 28, the described first polarizing layer 21 relative both sides that are arranged at described vertical orientation liquid crystal cell 25 stacked with described second polarizing layer 28; Described liquid crystal panel compensates framework and also comprises two-layer pair of optical axis A-compensate film, one deck first uniaxial C-compensate film 26 and one deck second uniaxial C-compensate film 27; Wherein two-layer pair of optical axis A-compensate film is identical first pair of optical axis A-compensate film 22 and second pair of optical axis A-compensate film 23.
In the present embodiment, described first pair of optical axis A-compensate film 22 and second pair of optical axis A-compensate film 23 are arranged between described vertical orientation liquid crystal cell 25 and described first polarizing layer 21, and the first uniaxial C-compensate film 26 and the second uniaxial C-compensate film 27 are arranged between described vertical orientation liquid crystal cell 25 and described second polarizing layer 28.Wherein, two optical axis A-compensate film offsets of this framework are first pair of optical axis A-compensate film 22 and second pair of optical axis A-compensate film 23 offset sum.
Further, the slow axis of described first pair of optical axis A-compensate film 22 and second pair of optical axis A-compensate film 23 is positioned at the absorption axle clamp angle of first light polarizing film 21 of described vertical orientation liquid crystal cell 25 the same side with it is 90 degree.Wherein, that is the absorption axle of the first polarizing layer 21 is 90 degree, and the slow axis of described pair of optical axis A-compensate film is 0 degree.Further, the absorption axle of described first polarizing layer 21 is 90 degree, then the absorption axle of the second polarizing layer 28 is 0 degree, and namely the absorption axle clamp angle of described first polarizing layer 21 and the second polarizing layer 28 is 90 degree.
Refer to Fig. 7, liquid crystal panel of the present invention compensates in framework six, compensate framework five difference with above-mentioned liquid crystal panel to be, described first pair of optical axis A-compensate film 22 and second pair of optical axis A-compensate film 23 are arranged between described vertical orientation liquid crystal cell 25 and described second polarizing layer 28, and the first uniaxial C-compensate film 26 and the second uniaxial C-compensate film 27 are arranged between described vertical orientation liquid crystal cell 25 and described first polarizing layer 21.The slow axis of described first pair of optical axis A-compensate film 22 and second pair of optical axis A-compensate film 23 is positioned at second light polarizing film 28 of described vertical orientation liquid crystal cell 25 the same side absorption axle clamp angle with it is 90 degree.That is the absorption axle of the second polarizing layer 28 is 90 degree, and the slow axis of described pair of optical axis A-compensate film is 0 degree.
Refer to Fig. 8, liquid crystal panel of the present invention compensates in framework seven, compensate framework five difference with above-mentioned liquid crystal panel to be, described first pair of optical axis A-compensate film 22 and second pair of optical axis A-compensate film 23 and described first uniaxial C-compensate film 26 are arranged between described vertical orientation liquid crystal cell 25 and described first polarizing layer 21; Described second uniaxial C-compensate film 27 is arranged between described vertical orientation liquid crystal cell 25 and described second polarizing layer 28.Wherein the first uniaxial C-compensate film 26 is two between optical axis A-compensate film and vertical orientation liquid crystal cell 25 described in one.The absorption axle clamp angle of described first pair of optical axis A-compensate film 22 and second pair of optical axis A-compensate film 23 and the first polarizing layer 21 is 90 degree, that is the absorption axle of the first polarizing layer 21 is 90 degree, and the slow axis of described first pair of optical axis A-compensate film 22 and second pair of optical axis A-compensate film 23 is 0 degree.
Refer to Fig. 9, liquid crystal panel of the present invention compensates in framework eight, compensate framework seven difference with above-mentioned liquid crystal panel to be, described first pair of optical axis A-compensate film 22 and second pair of optical axis A-compensate film 23 and described first uniaxial C-compensate film 26 are arranged between described vertical orientation liquid crystal cell 25 and described second polarizing layer 28; Described second uniaxial C-compensate film 27 is arranged between described vertical orientation liquid crystal cell 25 and described first polarizing layer 21.The slow axis of described first pair of optical axis A-compensate film 22 and second pair of optical axis A-compensate film 23 is positioned at second light polarizing film 28 of described vertical orientation liquid crystal cell 25 the same side absorption axle clamp angle with it is 90 degree.That is the absorption axle of the second polarizing layer 28 is 90 degree, and the slow axis of described pair of optical axis A-compensate film is 0 degree.
In above framework, its objective is on the basis not changing existing polarizing layer absorption axle angle initialization, by reasonably arranging the offset of two optical axis A-compensate film and uniaxial C-compensate film, reach object angle serious for the dark-state light leak of liquid crystal panel deflected from region, nearly horizontal view angle toward region, nearly vertical angle of view.Wherein, the liquid crystal light path difference LC Δ ND scope of the present invention's above-described vertical orientation (VerticalAlignment, VA) liquid crystal cell is applicable to as [319.7,342.7] nm, and the pretilt theta scope of liquid crystal molecule is [85 °, 90 °].
In the above-described compensation framework of the present invention, meet the following conditions: in the face of described pair of optical axis A-compensate film, the span of optical path difference offset Ro is 55nm≤Ro≤81nm, outside its face, the span of optical path difference offset Rth is 208nm≤Rth≤306nm; The span of the offset Rth of described first uniaxial C-compensate film and the second uniaxial C-compensate film is Y1≤Rth≤Y2; Wherein Y1, Y2 meet following formula:
Y1＝0.001596x
2-1.32x+255.3；
Y2=-0.002968x
2+ 0.9x+23.8, wherein x is the value of the outer optical path difference offset Rth of two optical axis A-compensate film.
Needs illustrate, the above liquid crystal panel of the present invention compensates in framework, and the offset of described first and second pairs of optical axis A-compensate films is the offset of two optical axis A-compensate film.
Wherein, in the face of described pair of optical axis A-compensate film, outside optical path difference offset Ro and face, the scope of optical path difference offset Rth is obtained by following formula:
Ro＝(Nx-Ny)*d1，
Rth＝[(Nx+Ny)/2-Nz]*d1；
Wherein, Nx is the refractive index that described couple of optical axis A-compensates the X-direction of the largest refractive index provided in face, Ny is the refractive index that described couple of optical axis A-compensates Y-direction orthogonal with X-direction in face, Nz is the refractive index of described pair of optical axis A-compensate film thickness direction, and d1 is the thickness of described pair of optical axis A-compensate film.
Further, the present invention is in above framework, and the material that described liquid crystal panel compensation framework also comprises the 3rd protective seam the 19, three protective seam 19 be positioned at outside described first polarizing layer and described second polarizing layer is Triafol T.By PSA:(PressureSensitiveAdhesive between described vertical orientation liquid crystal cell and described various compensate film) pressure sensitive adhesive 20 glues note and fixes.
Compensate for the invention described above liquid crystal panel the optical compensation method that framework one to eight the invention provides a kind of described liquid crystal panel framework, described method comprises:
Choose the liquid crystal light path difference LC Δ ND scope of described vertical orientation liquid crystal cell for [319.7,342.7] nm, the pretilt theta scope of liquid crystal molecule is [85 °, 90 °];
Adjust described couple of optical axis A-and compensate the span of optical path difference offset Ro in face at 55nm≤Ro≤81nm;
Outside the face adjusting described pair of optical axis A-compensate film, the span of optical path difference offset Rth is at 208nm≤Rth≤306nm; And
Adjust the span of the offset Rth of described first uniaxial C-compensate film and the second uniaxial C-compensate film at Y1≤Rth≤Y2; Wherein Y1, Y2 meet following formula:
Y1＝0.001596x
2-1.32x+255.3；
Y2=-0.002968x
2+ 0.9x+23.8, x are the value of the outer optical path difference offset Rth of two optical axis A-compensate film.
Adjust the described couple of optical axis A-when compensating the span of optical path difference offset Ro in face and adjust the span of the outer optical path difference offset Rth in face of described pair of optical axis A-compensate film, carry out adjustment acquisition by following formula:
Ro＝(Nx-Ny)*d1，
Rth＝[(Nx+Ny)/2-Nz]*d1；
Illustrated by simulated experiment, in the process of simulation, carried out following setting:
First arranging two optical axis A-compensate film is positioned at the absorption axle of the polarizing layer of the same side angle with it is 90 °, and the liquid crystal pretilt angle of described liquid crystal display is arranged on scope [85 °, 90 °]; Liquid crystal position angle in four quadrants is set to 45 °, 135 °, 225 °, 315 °, liquid crystal light path difference LC △ ND is arranged on interval [319.7,342.7] nm; And the light source that simulation uses is blue light-YAG (YttriumAluminumGarnet) LED light spectrum, and its central brightness is defined as 100nit, distribution of light sources is lambert (Lambert) distribution.
Consult Figure 10-13, Figure 10 be liquid crystal panel of the present invention compensate framework one to eight be 319.7nm in liquid crystal light path difference, pretilt theta is 89 °, and light leak amount when dark-state light leak concentrates on great visual angle is with offset changing trend diagram; Figure 11 is liquid crystal panel of the present invention compensation framework one to eight is 324.3nm in liquid crystal light path difference, and pretilt theta is 89 °, and light leak amount when dark-state light leak concentrates on great visual angle is with offset changing trend diagram; Figure 12 is liquid crystal panel of the present invention compensation framework one to eight is 333.6nm in liquid crystal light path difference, and pretilt theta is 89 °, and light leak amount when dark-state light leak concentrates on great visual angle is with offset changing trend diagram; Figure 13 is liquid crystal panel of the present invention compensation framework one to eight is 342.7nm in liquid crystal light path difference, and pretilt theta is 89 °, and light leak amount when dark-state light leak concentrates on great visual angle is with offset changing trend diagram.In accompanying drawing, offset in the face that Ro represents two optical axis A-compensate film.Thus, by Figure 10-13, different offset of arranging in pairs or groups under different tilt angles is simulated, by above-mentioned simulation, can obtain at 319.7nm≤LC △ ND≤342.7nm, in the scope of 85 °≤θ≤90 °, when dark-state light leak is less than 0.3nit, the scope of the offset Rth of two optical axis A-compensate film is 208nm≤Rth≤306nm; The scope of the thickness compensation value of first, second uniaxial C-compensate film is Rth, Y1≤Rth≤Y2; Wherein Y1, Y2 meet following formula:
Y1＝0.001596x
2-1.32x+255.3；
Y2=-0.002968x
2+ 0.9x+23.8, wherein x is the value of the outer optical path difference offset Rth of two optical axis A-compensate film.
When the wherein said couple of optical axis A-compensates the span of optical path difference offset Ro in face and adjust the span of the outer optical path difference offset Rth in face of described pair of optical axis A-compensate film, carry out adjustment acquisition by following formula:
Ro＝(Nx-Ny)*d1，
Rth＝[(Nx+Ny)/2-Nz]*d1；
Therefore offset can be changed by following three kinds of methods:
On the basis that the existing couple of optical axis A-compensate film refractive index N is constant, change thickness d and change offset;
On the basis that the existing pair of optical axis A-compensate film thickness d is constant, change refractive index N and change offset;
On the basis ensureing two optical axis A-compensate film thickness compensation value Rth scope, change thickness d and refractive index N change offset simultaneously.Such as, the refractive index Nx of known described pair of optical axis A-compensate film, during the value of Ny, Nz, adjusts the thickness d 1 of described pair of optical axis A-compensate film, according to above-mentioned formula, and Ro=(Nx-Ny) * d1, Rth=[(Nx+Ny)/2-Nz] * d1; The span of optical path difference offset Ro in the face of described pair of optical axis A-compensate film is adjusted to: 55nm≤Ro≤81nm, the span of optical path difference offset Rth outside its face is adjusted to: 208nm≤Rth≤306nm.
The offset that selection one is concrete below also tests corresponding compensation result, illustrates the technique effect acquired by technical scheme of the present invention further.
Consult the luminance contour distribution plan such as the full visual angle of dark-state that Figure 14 a and Figure 14 b, Figure 14 a is the liquid crystal panel after compensating in this specific embodiment, Figure 14 b is the contrast contoured profile figure such as the full visual angle of liquid crystal panel after compensating in this specific embodiment.Figure 14 a and Figure 14 b imposes a condition as optical path difference Δ n × d=287.2nm, pretilt theta=89 °, Ro=75nm, Rth1=281nm, uniaxial C-compensate film Rth2=17.9nm, dark-state light leak 0.149it.Contrasted by Figure 14 a and Fig. 1 a, can see intuitively, the liquid crystal panel after the compensation framework of above parameter compensates, dark-state light leak concentrates near vertical angle of view, light leak scope concentrates in less angular field of view, and light leak amount is starkly lower than existing individual layer compensates the dark-state light leak caused.Contrasted by Figure 14 b and Fig. 1 b, can see intuitively, liquid crystal panel after the compensation framework of above parameter compensates, full viewing angle contrast's degree distribution is obviously better than full viewing angle contrast's degree distribution that existing individual layer compensates, and particularly obtains in the contrast in region, nearly horizontal view angle and effectively improves.
Consult the luminance contour distribution plan such as the full visual angle of dark-state that Figure 15 a and Figure 15 b, Figure 15 a is the liquid crystal panel after compensating in this specific embodiment, Figure 15 b is the contrast contoured profile figure such as the full visual angle of liquid crystal panel after compensating in this specific embodiment.Figure 15 a and Figure 15 b imposes a condition as optical path difference Δ n × d=333.6nm, pretilt theta=89 °, Ro=65nm, Rth1=244nm, uniaxial C-compensate film Rth2=45.7nm, dark-state light leak 0.125it.Contrasted by Figure 15 a and Fig. 1 a, can see intuitively, the liquid crystal panel after the compensation framework of above parameter compensates, dark-state light leak concentrates near vertical angle of view, light leak scope concentrates in less angular field of view, and light leak amount is starkly lower than existing individual layer compensates the dark-state light leak caused.Contrasted by Figure 15 b and Fig. 1 b, can see intuitively, liquid crystal panel after the compensation framework of above parameter compensates, full viewing angle contrast's degree distribution is obviously better than full viewing angle contrast's degree distribution that existing individual layer compensates, and particularly obtains in the contrast in region, nearly horizontal view angle and effectively improves.
Consult the luminance contour distribution plan such as the full visual angle of dark-state that Figure 16 a and Figure 16 b, Figure 16 a is the liquid crystal panel after compensating in this specific embodiment, Figure 16 b is the contrast contoured profile figure such as the full visual angle of liquid crystal panel after compensating in this specific embodiment.Figure 16 a and Figure 16 b imposes a condition as optical path difference Δ n × d=342.7nm, pretilt theta=89 °, Ro=55nm, Rth1=208nm, uniaxial C-compensate film Rth2=65.5nm, dark-state light leak 0.11nit.Contrasted by Figure 16 a and Fig. 1 a, can see intuitively, the liquid crystal panel after the compensation framework of above parameter compensates, dark-state light leak concentrates near vertical angle of view, light leak scope concentrates in less angular field of view, and light leak amount is starkly lower than existing individual layer compensates the dark-state light leak caused.Contrasted by Figure 16 b and Fig. 1 b, can see intuitively, liquid crystal panel after the compensation framework of above parameter compensates, full viewing angle contrast's degree distribution is obviously better than full viewing angle contrast's degree distribution that existing individual layer compensates, and particularly obtains in the contrast in region, nearly horizontal view angle and effectively improves.
In sum, the embodiment of the present invention for this liquid crystal light path difference LC △ ND at [319.7nm, 342.7nm], liquid crystal pretilt angular region is [85 °, 90 °] optical compensation framework, by reasonably arranging the offset of two optical axis A-compensate film and uniaxial C-compensate film, angle serious for the dark-state light leak of liquid crystal panel can be deflected from region, nearly horizontal view angle toward region, nearly vertical angle of view; And effectively can weaken the dark-state light leak of liquid crystal panel on the whole and ensure that light leak concentrates in less scope.
Above-described embodiment, does not form the restriction to this technical scheme protection domain.The amendment done within any spirit at above-mentioned embodiment and principle, equivalently to replace and improvement etc., within the protection domain that all should be included in this technical scheme.
Claims (10)
1. a liquid crystal panel compensates framework, it is characterized in that: described liquid crystal panel compensates framework and comprises the first polarizing layer, vertical orientation liquid crystal cell, the second polarizing layer, the described first polarizing layer relative both sides that are arranged at described vertical orientation liquid crystal cell stacked with described second polarizing layer;
Described liquid crystal panel compensates framework and also comprises one deck two optical axis A-compensate film, one deck first uniaxial C-compensate film and one deck second uniaxial C-compensate film;
Described pair of optical axis A-compensate film is arranged between described vertical orientation liquid crystal cell and described first polarizing layer or between described vertical orientation liquid crystal cell and described second polarizing layer, and first, second uniaxial C-compensate film is arranged between described vertical orientation liquid crystal cell and described second polarizing layer or between described vertical orientation liquid crystal cell and described first polarizing layer; Or
Described pair of optical axis A-compensate film and described first uniaxial C-compensate film are arranged between described vertical orientation liquid crystal cell and described first polarizing layer or between described vertical orientation liquid crystal cell and described second polarizing layer, and described second uniaxial C-compensate film is arranged between described vertical orientation liquid crystal cell and described second polarizing layer or between described vertical orientation liquid crystal cell and described first polarizing layer; Wherein the first uniaxial C-compensate film is between described pair of optical axis A-compensate film and vertical orientation liquid crystal cell;
The liquid crystal light path difference LC Δ ND scope of described vertical orientation liquid crystal cell is [319.7,342.7] nm, and the pretilt theta scope of liquid crystal molecule is [85 °, 90 °]; In the face of described pair of optical axis A-compensate film, the span of optical path difference offset Ro is 55nm≤Ro≤81nm, and outside its face, the span of optical path difference offset Rth is 208nm≤Rth≤306nm; The span of the offset Rth of described first uniaxial C-compensate film and the second uniaxial C-compensate film is Y1≤Rth≤Y2; Wherein Y1, Y2 meet following formula:
Y1＝0.001596x
2-1.32x+255.3；
Y2=-0.002968x
2+ 0.9x+23.8, wherein x is the value of the outer optical path difference offset Rth of two optical axis A-compensate film.
2. liquid crystal panel as claimed in claim 1 compensates framework, it is characterized in that, in the face of described pair of optical axis A-compensate film, the scope of optical path difference offset Ro and the outer optical path difference offset Rth in face is by following formula adjustment acquisition:
Ro＝(Nx-Ny)*d1，
Rth＝[(Nx+Ny)/2-Nz]*d1；
Wherein, Nx is the refractive index that described couple of optical axis A-compensates the X-direction of the largest refractive index provided in face, Ny is the refractive index that described couple of optical axis A-compensates Y-direction orthogonal with X-direction in face, Nz is the refractive index of described pair of optical axis A-compensate film thickness direction, and d1 is the thickness of described pair of optical axis A-compensate film.
3. liquid crystal panel as claimed in claim 1 or 2 compensates framework, it is characterized in that, the angle that slow axis and two optical axis A-compensate film of described pair of optical axis A-compensate film are positioned at the absorption axle of first or second polarizing layer of described vertical orientation liquid crystal cell the same side is 90 degree, and the absorption axle clamp angle of described first polarizing layer and described second polarizing layer is 90 degree.
4. liquid crystal panel as claimed in claim 1 or 2 compensates framework; it is characterized in that; described liquid crystal panel compensates framework and also comprises the 3rd protective seam be positioned at outside described first polarizing layer and described second polarizing layer, and the material of the 3rd protective seam is Triafol T.
5. a liquid crystal panel compensates framework, it is characterized in that: described liquid crystal panel compensates framework and comprises the first polarizing layer, vertical orientation liquid crystal cell, the second polarizing layer, the described first polarizing layer relative both sides that are arranged at described vertical orientation liquid crystal cell stacked with described second polarizing layer;
Described liquid crystal panel compensates framework and also comprises two-layer pair of optical axis A-compensate film, one deck first uniaxial C-compensate film and one deck second uniaxial C-compensate film;
Described two-layer pair of optical axis A-compensate film is arranged between described vertical orientation liquid crystal cell and described first polarizing layer or between described vertical orientation liquid crystal cell and described second polarizing layer, and first, second uniaxial C-compensate film is arranged between described vertical orientation liquid crystal cell and described second polarizing layer or between described vertical orientation liquid crystal cell and described first polarizing layer; Or
Described two-layer pair of optical axis A-compensate film and described first uniaxial C-compensate film are arranged between described vertical orientation liquid crystal cell and described first polarizing layer or between described vertical orientation liquid crystal cell and described second polarizing layer, and described second uniaxial C-compensate film is arranged between described vertical orientation liquid crystal cell and described second polarizing layer or between described vertical orientation liquid crystal cell and described first polarizing layer; Wherein the first uniaxial C-compensate film is two between optical axis A-compensate film and vertical orientation liquid crystal cell described in one;
The liquid crystal light path difference LC Δ ND scope of described vertical orientation liquid crystal cell is [319.7,342.7] nm, the pretilt theta scope of liquid crystal molecule be [85 °, 90 °); In the face of described two-layer pair of optical axis A-compensate film, the span of optical path difference sum offset Ro is 55nm≤Ro≤81nm, and outside its face, the span of optical path difference offset Rth is 208nm≤Rth≤306nm; The span of the offset Rth of described first uniaxial C-compensate film and the second uniaxial C-compensate film is Y1≤Rth≤Y2; Wherein Y1, Y2 meet following formula:
Y1＝0.001596x
2-1.32x+255.3；
Y2＝-0.002968x
2+0.9x+23.8。
6. liquid crystal panel as claimed in claim 5 compensates framework, it is characterized in that, in the face of two optical axis A-compensate film described in each, the scope of optical path difference offset Ro and the outer optical path difference offset Rth in face is by following formula adjustment acquisition:
Ro＝(Nx-Ny)*d1，
Rth＝[(Nx+Ny)/2-Nz]*d1；
Wherein, Nx is the refractive index that described couple of optical axis A-compensates the X-direction of the largest refractive index provided in face, Ny is the refractive index that described couple of optical axis A-compensates Y-direction orthogonal with X-direction in face, Nz is the refractive index of described pair of optical axis A-compensate film thickness direction, and d1 is the thickness of described pair of optical axis A-compensate film.
7. the liquid crystal panel as described in claim 5 or 6 compensates framework, it is characterized in that, the absorption axle clamp angle that slow axis and two optical axis A-compensate film of two optical axis A-compensate films of described every one deck are positioned at first or second light polarizing film of described vertical orientation liquid crystal cell the same side is 90 degree.
8. an optical compensation method for the liquid crystal panel framework as described in any one of claim 1-7, described method comprises:
Choose the liquid crystal light path difference LC Δ ND scope of described vertical orientation liquid crystal cell for [319.7,342.7] nm, the pretilt theta scope of liquid crystal molecule is [85 °, 90 °];
Adjust described couple of optical axis A-and compensate the span of optical path difference offset Ro in face at 55nm≤Ro≤81nm;
Outside the face adjusting described pair of optical axis A-compensate film, the span of optical path difference offset Rth is at 208nm≤Rth≤306nm; And
Adjust the span of the offset Rth of described first uniaxial C-compensate film and the second uniaxial C-compensate film at Y1≤Rth≤Y2; Wherein Y1, Y2 meet following formula:
Y1＝0.001596x
2-1.32x+255.3；
Y2=-0.002968x
2+ 0.9x+23.8, x are the value of the outer optical path difference offset Rth of two optical axis A-compensate film.
9. the optical compensation method of liquid crystal panel framework as claimed in claim 8, it is characterized in that, adjust the described couple of optical axis A-when compensating the span of optical path difference offset Ro in face and adjust the span of the outer optical path difference offset Rth in face of described pair of optical axis A-compensate film, carry out adjustment acquisition by following formula:
Ro＝(Nx-Ny)*d1，
Rth＝[(Nx+Ny)/2-Nz]*d1；
Wherein, Nx is the refractive index that described couple of optical axis A-compensates the X-direction of the largest refractive index provided in face, Ny is the refractive index that described couple of optical axis A-compensates Y-direction orthogonal with X-direction in face, Nz is the refractive index of described pair of optical axis A-compensate film thickness direction, and d1 is the thickness of described pair of optical axis A-compensate film.
10. the optical compensation method of liquid crystal panel framework as claimed in claim 9, it is characterized in that, adjusting described couple of optical axis A-compensates in the step of the span of face offset Ro and Rth, when described pair of optical axis A-compensate film is double-deck, the span of described Ro and Rth is the offset sum of double-deck two optical axis A-compensate film.
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