CN102445788B - Photo-alignment processing procedure and liquid crystal display employing same - Google Patents
Photo-alignment processing procedure and liquid crystal display employing same Download PDFInfo
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- CN102445788B CN102445788B CN201010517784.7A CN201010517784A CN102445788B CN 102445788 B CN102445788 B CN 102445788B CN 201010517784 A CN201010517784 A CN 201010517784A CN 102445788 B CN102445788 B CN 102445788B
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Abstract
The invention discloses a photo-alignment processing procedure and a liquid crystal display device employing same, wherein the photo-alignment processing procedure comprises the following steps of: forming a photo-alignment material layer on a base plate; and employing linearly polarized light to irradiate the photo-alignment material layer, wherein the surface of the photo-alignment material layer is a first plane. A wave vector of the linearly polarized light is a K vector. The K vector and a normal vector of the first plane form a second plane. Polarization direction of the linearly polarized light is not perpendicular and not parallel to the second plane.
Description
Technical field
The invention relates to a kind of alignment manufacture process and the display device that uses this alignment manufacture process, and relate to especially a kind of smooth alignment manufacture process and the liquid crystal indicator that uses this light alignment manufacture process.
Background technology
Liquid crystal indicator is to apply electric field with the electrode on two substrates for liquid crystal layer, liquid crystal molecule in liquid crystal layer produces deflection because of the effect of electric field, make liquid crystal layer there is the light penetration rate corresponding to this electric field, to show different gray scale pictures according to electric field level.In addition, induce liquid crystal molecule to arrange along specific direction for the stable boundary condition of liquid crystal molecule is provided, on the surface of at least one substrate contacts liquid crystal layer, can form a both alignment layers.Make both alignment layers produce the orientation effect of specific direction, known way be with the processing procedure of contact to both alignment layers with rub (rubbing), but this mode has both alignment layers may produce by scratch and easily the problem that particulate (particle) pollutes, therefore develop contactless alignment manufacture process, as light alignment manufacture process.Light alignment manufacture process is to irradiate both alignment layers to produce orientation effect with linearly polarized light.And direction when linearly polarized light incident determines the alignment direction of both alignment layers, the tilt angle can affect with the angle of both alignment layers that liquid crystal molecule is subject to orientation afterwards when linearly polarized light incident time.
Fig. 1 is the schematic diagram of known alignment manufacture process, and Fig. 2 A and Fig. 2 B are the enlarged diagrams in Tu1Liang Ge district.Please refer to Fig. 1, in order to make both alignment layers 110 have different alignment direction at diverse location, the linearly polarized light 120 of different directions is to irradiate both alignment layers 110 via a mask 130.And, moving substrate 140 or light source and make both alignment layers 110Ge district all be subject to the irradiation of linearly polarized light 120 and there is specific alignment direction.The support that mask 130 is generally only subject to board around it makes it to keep at a distance with substrate 140.Along with the size of substrate 140 increases and shortens the demand of processing procedure time, the size of mask 130 is done larger and larger.But mask 130 can produce because of gravity bending.In addition, the material of mask itself is easily subject to deflection, causes the distance between mask 130 and the both alignment layers 110 of diverse location different.Under the identical condition of the incident angle of linearly polarized light 120, the distance between external zones and the both alignment layers 110 of mask 130 is as shown in Figure 2 B larger, and distance between central area and the both alignment layers 110 of mask 130 is as shown in Figure 2 A less.As mentioned above, the incident light of general light alignment technique all can have an oblique incidence angle with respect to substrate and mask, but this oblique incidence angle can make the projection of oblique incidence light on substrate have displacement error because of the problem of mask deflection.Therefore, in the time of the central area of mask 130 and both alignment layers 110 accurate contraposition, between the external zones of mask 130 and both alignment layers 110, will there is bit errors, cause both alignment layers 110 to fail to obtain desirable orientation effect.
Fig. 3 A illustrates the relation of linearly polarized light and both alignment layers in known light alignment manufacture process.Please refer to Fig. 3 A, in order to make liquid crystal molecule be subject to both alignment layers 110 to there is tilt angle as the used time, between the linearly polarized light 120 of known light alignment technique and the normal vector of both alignment layers 110, can there is an oblique incidence angle.Normal vector 112 coplines of the wave vector 122 of linearly polarized light 120, the polarization direction of linearly polarized light 120 124 and both alignment layers 110.Under this condition, the alignment direction 114 that both alignment layers 110 obtains is with wave vector 122, polarization direction 124 and normal vector 112 coplines, and the alignment direction 114 that both alignment layers 110 obtains is parallel to the orthogonal projection of polarization direction 124 in both alignment layers 110.Therefore the alignment direction 114 that, adjust alignment film just must be adjusted the wave vector 122 of linearly polarized light 120 that is the incident direction of linearly polarized light 120.Thus, to in both alignment layers 110, obtain multiple different alignment direction the relative orientation providing between the light supply apparatus of linearly polarized light 120 (not illustrating) and substrate just must be repeatedly provided, increase the time cost of light alignment manufacture process, and increase the chance that fabrication errors occurs.
Fig. 3 B is the mask that uses of the alignment manufacture process of Fig. 1 and the schematic diagram of light incident direction.Please refer to Fig. 3 B, mask 130 has multiple photic zones 132, and these photic zones 132 are independent and not connected mutually.Linearly polarized light 120 with the direction shown in arrow by behind photic zone 132, ideally can be according to the position that is located at dotted line frame 152 and is enclosed.But, because mask 130 bendings make it change and have a displacement error after causing linearly polarized light 120 by photic zone 132 with the distance of substrate, be radiated at the position that the dotted line frame 154 different from dotted line frame 152 enclosed.The position of dotted line frame 154 has side-play amount compared to the position of dotted line frame 152 in X-axis and Y-axis.If two adjacent areas are different alignment direction in pixel, the offset deviation amount that mask 130 bendings cause may cause the region of two adjacent different alignment directions to overlap each other, and orientation effect is reduced.For example, the position of dotted line frame 154 is that linearly polarized light 120 is by the region of photic zone 132 rear irradiations.The position of dotted line frame 156 be photic zone 132 because position moves on to behind the region of lower left of current position, the region that linearly polarized light 120 irradiates by photic zone 132.Can be overlapped with dotted line frame 156 by the visible dotted line frame 154 of Fig. 3 B, cause the alignment direction confusion of the both alignment layers of lap.In other situations, the both alignment layers that part may occur fails not produced the problem of polarization direction by linearly polarized light 120.
In addition, due to cost and technical matters, the size of mask 130 cannot be equal to the size of substrate 140 (being shown in Fig. 1), mask 130 must carry out multiple bearing and illuminated line polarized light 120 with substrate 140, just can complete whole alignment manufacture process, cause processing procedure cost to increase and reduce process rate.For improving the problems such as above-mentioned, known technology has developed scan-type orientation method, because of light incident direction identical with direction of scanning, even if the direction that mask extends in parallel in scanning has bending, the alignment direction all because of the parallel direction of scanning is all consistent, therefore scanning extends in parallel distortion's Influence of Displacement minimizing that the bending of direction mask causes.But there is above-mentioned offset deviation in this scan mode equally, therefore being limited to can only be by the both alignment layers orientation one-tenth direction parallel with direction of scanning, this mode is used in wide viewing angle vertical light alignment technique at present if detorsion is to the volume production of row (Inverse Twisted Nematic, ITN) product.
With regard to another liquid crystal reaction rate wide viewing angle light alignment technique-electrically conerolled birefringence (Electrically Controlled Birefringence faster, ECB), because ECB has the advantages such as liquid crystal reaction rate is very fast, therefore high at the application possibility in liquid crystal indicator future.Wide viewing angle ecb mode needs equally at least alignment direction of four direction in general pixel, and because the differential seat angle 180 of upper and lower base plate orientation in ecb mode is spent, therefore need to do respectively the irradiation of four different incident light directions in same pixel (sub-pixel), can have any problem therefore be designed to the orientation mode of scan-type.
Summary of the invention
The invention provides a kind of light alignment manufacture process, can provide with scan mode orientation and can obtain the alignment direction different from direction of scanning.
The invention provides a kind of liquid crystal indicator, the orientation effect that can solve both alignment layers is bad and cause the not good problem of image quality.
Smooth alignment manufacture process of the present invention comprises the following steps.On a substrate, form a smooth alignment materials layer.With a linearly polarized light light irradiation alignment materials layer.The surface of light alignment materials layer is one first plane.The wave vector of linearly polarized light is a K vector.K vector forms one second plane with the normal vector of the first plane.One polarization direction out of plumb of linearly polarized light is also not parallel to the second plane.
In an embodiment of smooth alignment manufacture process of the present invention, the orthogonal projection of polarization direction in the first plane is ψ with the angle of the absorption axes that is attached to the polaroid on substrate
f, ψ
fbe essentially 45 degree, 135 degree, 225 or 315 degree.
In an embodiment of smooth alignment manufacture process of the present invention, K vector is θ with the angle of the normal vector of the first plane, and θ is 40 degree.
In an embodiment of smooth alignment manufacture process of the present invention, linearly polarized light is light irradiation alignment materials layer continuously, at linearly polarized light continuously when light irradiation alignment materials layer, K vector moves along a moving direction with an intersection point of the first plane, and orthogonal projection and the moving direction of K vector in the first plane is overlapping.Make the method that intersection point moves along moving direction comprise fixing base and portable cord polarized light.Make the method that intersection point moves along moving direction comprise static line polarized light and moving substrate.Substrate is divided into pixel region multiple times, and each time pixel region comprises at least one subregion, and each subregion is divided into multiple orientations district along the direction of vertical moving direction, and the orientation district forming a line along moving direction is formed with identical alignment direction.Substrate is rectangular substrate.Each pixel region is rectangle.Each subregion is divided into four orientation districts along the direction of vertical moving direction.Each time pixel region comprises two subregions, is divided into four orientation districts along the direction of vertical this moving direction.
In an embodiment of smooth alignment manufacture process of the present invention, linearly polarized light is light irradiation alignment materials layer steppingly.Substrate is divided into pixel region multiple times, and each time pixel region comprises at least one subregion, and each subregion is at least divided into four orientation districts by two separator bars that cross one another.Substrate is rectangular substrate.Each pixel region is rectangle.Each subregion is divided into four orientation districts by two mutually perpendicular separator bars.Each time pixel region comprises two subregions, and each subregion is at least divided into four orientation districts by two separator bars that cross one another.
In an embodiment of smooth alignment manufacture process of the present invention, linearly polarized light is via a mask light irradiation alignment materials layer.
In an embodiment of smooth alignment manufacture process of the present invention, linearly polarized light is ultraviolet light.
Liquid crystal indicator of the present invention comprises a first substrate, a second substrate and a liquid crystal layer.First substrate has one first electrode layer and one first both alignment layers that covers the first electrode layer.The first both alignment layers is carried out orientation with aforesaid smooth alignment manufacture process.Second substrate has a second electrode lay.Liquid crystal layer is disposed between first both alignment layers and the second electrode lay of second substrate of first substrate.
In an embodiment of liquid crystal indicator of the present invention, second substrate has more one second both alignment layers, and the second both alignment layers covers the second electrode lay, and the second both alignment layers is carried out orientation with light alignment manufacture process as the aforementioned.The angle of the alignment direction in region corresponding to the first both alignment layers and the second both alignment layers is 180 degree.
In an embodiment of liquid crystal indicator of the present invention, first substrate is divided into pixel region multiple times, each time pixel region comprises at least one subregion, each subregion is divided into multiple orientations district along a side of time pixel region, and wantonly two orientation districts adjacent and that belong to different inferior pixel region have identical alignment direction.Liquid crystal indicator more comprises two Polarizers, is pasted to respectively first substrate and second substrate, and wherein the angle of the alignment direction in the absorption axes of at least one Polarizer and at least one orientation district is 45 degree.First substrate is rectangular substrate.Each pixel region is rectangle.The wantonly two adjacent and borders in orientation district that belong to different inferior pixel region are on same straight line.Each subregion is divided into four orientation districts along a side of time pixel region.The position angle of the alignment direction in four orientation districts of each subregion is sequentially 225 °, 315 °, 45 ° and 135 °.The first electrode layer has multiple slits, three borders in four orientation districts of corresponding each the pixel region, position of slit or one of them of three borders.The position angle of the alignment direction in four orientation districts of each pixel region is sequentially 225 °, 315 °, 135 ° and 45 ° or 225 °, 135 °, 315 ° and 45 °.The first electrode layer has multiple slits, is arranged in two borders of both sides or three borders and is positioned at one of them of two borders of both sides in three borders in four orientation districts of corresponding each pixel region, the position of slit.The position angle of the alignment direction in four orientation districts of each pixel region is sequentially 225 °, 45 °, 315 ° and 135 °.The first electrode layer has multiple slits, in three borders in four orientation districts of corresponding each the pixel region, position of slit, is positioned at central border.
In an embodiment of liquid crystal indicator of the present invention, first substrate is divided into pixel region multiple times, and each time pixel region comprises at least one subregion, and each subregion is at least divided into four orientation districts by two separator bars that cross one another.The position angle of the alignment direction in four orientation districts of each pixel region is respectively 225 °, 135 °, 45 ° and 315 ° along clockwise direction.Each time pixel region comprises two subregions, and each subregion is at least divided into four orientation districts by two separator bars that cross one another.
Based on above-mentioned, in smooth alignment manufacture process of the present invention, as long as change wave vector that the polarization direction and not needing of linearly polarized light changes linearly polarized light and just can change the alignment direction of light alignment materials layer, therefore can use scan mode in the processing procedure of wide viewing angle electrically controlled birefringence mode, and can reduce the generation direction of bit errors, also can promote liquid crystal reaction rate, therefore can promote the display quality of liquid crystal indicator of the present invention.
Brief description of the drawings
For above-mentioned purpose of the present invention, feature and advantage can be become apparent, below in conjunction with accompanying drawing, the specific embodiment of the present invention is elaborated, wherein:
Fig. 1 is the schematic diagram of known alignment manufacture process.
Fig. 2 A and Fig. 2 B are the enlarged diagrams in Tu1Liang Ge district.
Fig. 3 A illustrates the relation of linearly polarized light and both alignment layers in known light alignment manufacture process.
Fig. 3 B is the mask that uses of the alignment manufacture process of Fig. 1 and the schematic diagram of light incident direction.
Fig. 4 illustrates the relation of linearly polarized light and light alignment materials layer in the light alignment manufacture process of one embodiment of the invention.
The graph of a relation of mask and linearly polarized light when Fig. 5 is the light alignment manufacture process practical application of Fig. 4.
Fig. 6 A is the schematic diagram of the substrate of the mask below of Fig. 5.
Fig. 6 B is the schematic diagram of the inferior pixel region of further embodiment of this invention.
Fig. 7 A is the mask of another embodiment of the present invention and the graph of a relation of substrate.
Fig. 7 B is the schematic diagram of the inferior pixel region of yet another embodiment of the invention.
Fig. 8 is the cut-open view of the liquid crystal indicator of one embodiment of the invention.
Fig. 9 A to Fig. 9 D is respectively the schematic diagram of the inferior pixel region of four kinds of embodiment.
Figure 10 is the light transmission state of simulating gained after the inferior pixel region configuration slit of Fig. 9 B.
Main element symbol description:
110: both alignment layers
112: the normal vector of both alignment layers
114: alignment direction
120: linearly polarized light
122: wave vector
124: polarization direction
130,230: mask
132,232: photic zone
132A: edge
140: substrate
152,154: dotted line frame
210: substrate
212,216,218A, 218D, 316: inferior pixel region
212A, 212B, 212C, 212D, 216A, 216B, 216C, 216D, 218C, 218E, 316A, 316B, 316C, 316D: orientation district
214: separator bar
218B: subregion
220: light alignment materials layer
230: Polarizer
232: the absorption axes of Polarizer
P10: the first plane
P20: the second plane
P30: the 3rd plane
L10: linearly polarized light
D10: polarization direction
The projecting direction of D20:K vector
D22: moving direction
D30: alignment direction
ψ
i: the angle of polarization direction and the second planar process vector
ψ
f: the orthogonal projection of polarization direction in the first plane and the angle of absorption axes that is attached to the polaroid on substrate
The angle of the normal vector of θ: K vector and the first plane
300: liquid crystal indicator
310,320: substrate
312,322: electrode layer
312A: slit
314: both alignment layers
330: liquid crystal layer
Embodiment
Fig. 4 illustrates the relation of linearly polarized light and light alignment materials layer in the light alignment manufacture process of one embodiment of the invention.Please refer to Fig. 4, the light alignment manufacture process of the present embodiment is first on a substrate 210, to form a smooth alignment materials layer 220, then with a linearly polarized light L10 light irradiation alignment materials layer 220, so that light alignment materials layer 220 has orientation ability.Light alignment technique is to utilize linearly polarized light to carry out polymerization or cracking reaction or make molecular configuration do the rearrangement of order at specific direction by alignment materials, makes the molecules align of alignment materials become orderliness from sexual state out of order.Utilizing the alignment materials of the molecules align of orderliness can induce liquid crystal molecule orderliness arranges.Linearly polarized light L10 can be ultraviolet light or other suitable light.
At this, the surface of setting light alignment materials layer 220 is one first plane P 10.The wave vector of linearly polarized light L10 is a K vector, and wave vector is the vector of the light direction of wave travel for representing linearly polarized light L10.K vector forms one second plane P 20 with the normal vector (showing with Z-direction scale in Fig. 4) of the first plane.A polarization direction D10 out of plumb of linearly polarized light L10 is also not parallel to the second plane P 20.
The graph of a relation of mask and linearly polarized light when Fig. 5 is the light alignment manufacture process practical application of Fig. 4.Please refer to Fig. 4 and Fig. 5, mask 130 has the photic zone 132 of rectangle.Utilize the light alignment manufacture process of Fig. 4, the projection of the K vector of linearly polarized light L10 in the first plane P 10 of light alignment materials layer 220 is as direction D20, and light alignment materials layer 220 produces an alignment direction D30 after irradiated by linearly polarized light L10.Alignment direction D30 can change via adjusting the polarization direction D10 of linearly polarized light L10, alignment direction D30 preferred embodiment be with substrate 210 on the absorption axes 232 of the Polarizer 230 that attaches press from both sides miter angle, can reach preferably penetration.This angle may be 45 degree because of fabrication errors but not just.Polarizer 230 is positioned on the not coplanar of substrate 210 with light alignment materials layer 220.Meanwhile, the projecting direction D20 of the K vector of linearly polarized light L10 is parallel to the edge 132A of photic zone 132.Therefore,, even if mask 130 has bending phenomenon, also only can produce contraposition skew in the direction perpendicular to edge 132A, and can not produce contraposition skew in the direction that is parallel to edge 132A.That is be to adopt the light alignment manufacture process of the present embodiment the impact of contraposition skew can be confined to single direction and be easy to compensation.And, do not need the projecting direction D20 of the K vector that changes linearly polarized light L10, still can change the polarization direction D10 of linearly polarized light L10 and change alignment direction D30, to meet various design requirements.
Relation between polarization direction D10 and the alignment direction D30 of linearly polarized light L10 is described referring to Fig. 4.The polarization state of K vector has the component of P vector and S vector, and P vector is parallel to the second plane P 20, S parallel the first plane P 10 of vector and perpendicular to the second plane P 20.Wherein, S vector, P vector are positioned in one the 3rd plane P 30 with polarization direction D10.The polarization direction D10 of linearly polarized light L10 must be perpendicular to the wave vector of linearly polarized light L10 (be K vector, that is the direct of travel of linearly polarized light L10).The angle of polarization direction D10 and S vector is ψ
i.At this, angle ψ
idefinition be the angle being turned while going to parallel polarization direction D10 with S vector for benchmark.K vector is θ with the angle of the normal vector (being Z-direction amount) of the first plane P 10.The angle of the absorption axes 232 of the Polarizer 230 attaching on the alignment direction D30 that light alignment materials layer 220 produces after irradiated by linearly polarized light L 10 and substrate 210 is ψ
f.Now, ψ
f=tan
-1(tan ψ
i/ cos θ).For example, ψ
ibe 37.5 degree, ψ
fbe 45 degree, θ is 40 degree.
Please refer to Fig. 4 and Fig. 5, the projecting direction D20 of the K vector of linearly polarized light L10 is parallel to the edge 132A of photic zone 132, contraposition skew can be confined to single direction and be easy to compensation.With the mask 130 of Fig. 5, because each photic zone 132 is not connected, therefore complete after the orientation of the corresponding smooth alignment materials layer 220 of mask 130, just need mobile mask 130 and provide the light source of linearly polarized light L10 so that light orientation is carried out in other regions.Certainly, also can permanent mask 130 with the light source of linearly polarized light L10 is provided, and change moving substrate 210 into, also can reach identical effect.The mode that the step of this movement and irradiation light hockets is called step-by-step movement.
Fig. 6 A is the schematic diagram of the substrate of the mask below of Fig. 5.Please refer to Fig. 5 and Fig. 6 A.Substrate 210 is divided into pixel region 212 multiple times.Each time pixel region 212 is divided into four orientation district 212A, 212B, 212C and 212D by two separator bars that cross one another 214.Along clockwise direction, the position angle of the alignment direction of orientation district 212A, orientation district 212B, orientation district 212C and orientation district 212D is for example sequentially 225 °, 135 °, 45 ° and 315 °, but is not limited to this.In the embodiment of Fig. 6 B, each time pixel region 218A has two subregion 218B, and each subregion 218B is divided into four orientation district 218C by two separator bars that cross one another 214, and the alignment direction of each orientation district 218C as shown by arrows.The mode that inferior pixel region 218A is divided into multiple subregion 218B can be applicable to the design of low colour cast.
Fig. 7 A is the mask of another embodiment of the present invention and the graph of a relation of substrate.Please refer to Fig. 4 and Fig. 7 A, in the present embodiment, linearly polarized light L10 is light irradiation alignment materials layer 220 continuously.At linearly polarized light L10, continuously when light irradiation alignment materials layer 220, K vector moves along a moving direction D22 with an intersection point Z10 of the first plane P 10.Orthogonal projection direction D20 and the moving direction D22 in the first plane P 10 is overlapping for K vector.In the present embodiment, each the pixel region 216 of substrate 210 is divided into four orientation district 216A, 216B, 216C and 216D along the direction (along the side E10 of time pixel region 216) of vertical moving direction D22.Wherein, the multiple orientations district forming a line along moving direction D22 is formed with identical alignment direction.In the present embodiment, each pixel region 216A, 216B, each border that 216C is vertical with moving direction D22 with 216D are a straight line.But each pixel region 216A, 216B, each border that 216C is vertical with moving direction D22 with 216D also can not be a straight line, as long as the wantonly two adjacent and borders in orientation district that belong to different inferior pixel region are on same straight line.The one or more orientations district forming a line along moving direction D22 of can aliging, the photic zone 232 of mask 230.Because there is identical alignment direction in the orientation district of same row, therefore provide the light source of linearly polarized light L10 and mask 230 when along moving direction D22, linearly polarized light L10 can carry out orientation to the multiple orientations district passing through continuously, do not need to adopt the mode of stepping do repeatedly to bit motion.So, can further save processing procedure time and cost.Simultaneously, due to K vector, orthogonal projection and the moving direction D22 in the first plane P 10 is overlapping, the skew that therefore can't have the oblique irradiation of linearly polarized light L10 to produce on moving direction D22, can reduce moving direction D22 because of mask 230 bending on moving direction D22 is along the line zones of different have the problem of different contraposition side-play amounts.
In the embodiment of Fig. 7 B, each time pixel region 218D is divided into eight orientation district 218E, and the alignment direction of each orientation district 218E as shown by arrows.These orientation districts 218E also can be divided into upper and lower two or more groups, to be applied to the design of low colour cast.
Fig. 8 is the cut-open view of the liquid crystal indicator of one embodiment of the invention.Please refer to Fig. 8, the liquid crystal indicator 300 of the present embodiment comprises a substrate 310, a substrate 320 and a liquid crystal layer 330.Substrate 310 has a both alignment layers 314 of an electrode layer 312 and covers electrode layer 312.Substrate 320 has a both alignment layers 324 of an electrode layer 322 and covers electrode layer 322.Liquid crystal layer 330 is disposed between the both alignment layers 314 of substrate 310 and the both alignment layers 324 of substrate 320.The angle of the alignment direction of both alignment layers 314 and 324 on region is in correspondence with each other for example 180 degree.Liquid crystal indicator 300 also can comprise two Polarizers 340, is attached to respectively on the surface of substrate 310 and 320.Both alignment layers 314 and 324 can aforementioned each embodiment or other smooth alignment manufacture process of the present invention carry out orientation.Therefore, the process rate of the both alignment layers 314 and 324 of the present embodiment is good and processing procedure cost is lower, so promote the present embodiment liquid crystal indicator 300 display quality and reduce costs.
At this, substrate 320 can be colored optical filtering substrates, and electrode layer 322 can be common electrode layer, and substrate 310 can be active elements array substrates, and electrode layer 312 can be pixel electrode layer, or also can adopt other suitable configuration modes.In addition, substrate 320 also can have the both alignment layers of covers electrode layer 322.
Fig. 9 A to Fig. 9 D is respectively the schematic diagram of the inferior pixel region of four kinds of embodiment.Please refer to Fig. 9 A, the inferior pixel region 216 of similar Fig. 7, the substrate 310 of Fig. 8 also can be divided into pixel region 316 multiple times, only illustrates pixel region 316 one time at this.Each time pixel region 316 is divided into four orientation district 316A, 316B, 316C and 316D along the vertical direction of the moving direction of the linearly polarized light of light alignment manufacture process.The first half by Fig. 9 A can see, the position angle of the alignment direction of four orientation district 316A, 316B, 316C and 316D be respectively 225 °, 315 °, 45 ° with 135 °.Can see this orientation mode by the Lower Half of Fig. 9 A time, simulate the light transmission state after inferior pixel region 316 voltage startings of gained.Now, can on electrode layer 312, be formed with multiple slit 312A, at least one in each three borders between four orientation district 316A and 316B of corresponding each pixel region 316, the position of slit 312A, between 316B and 316C, between 316C and 316D.Certainly, on electrode layer 322, also can be designed with slit.By the marginal electric field action of slit 312A, accelerate liquid crystal be subject to the speed of arranging after voltage and improve between four orientation district 316A and 316B, area that three borderline dark lines between 316B and 316C, between 316C and 316D distribute improve brightness.
Please refer to Fig. 9 B, the position angle of the alignment direction of four orientation district 316A, 316B, 316C and 316D is respectively 225 °, 45 °, 315 ° and 135 °.Can see this orientation mode by the Lower Half of Fig. 9 B time, simulate the light transmission state after inferior pixel region 316 voltage startings of gained, wherein only there is dark line on the border between orientation district 316B and 316C.Now, can allow border between the corresponding orientation district 316B in position and the 316C of slit 312A.By the effect of slit 312A limit electric field, accelerate liquid crystal be subject to the speed of arranging after voltage and improve orientation district 316B and 316C borderline dark line distribution area and improve brightness, as shown in figure 10.
Please refer to Fig. 9 C, the position angle of the alignment direction of four orientation district 316A, 316B, 316C and 316D is respectively 225 °, 135 °, 315 ° and 45 °.Can see this orientation mode by the Lower Half of Fig. 9 C time, simulate the light transmission state after inferior pixel region 316 voltage startings of gained, wherein there is obviously dark line on the border between the border between orientation district 316A and 316B and orientation district 316C and 316D.Now, can allow border between the corresponding orientation district 316A in position and the 316B of slit 312A and the border between orientation district 316C and 316D.By the effect of slit 312A limit electric field, accelerate liquid crystal and be subject to the speed of arranging after voltage and improve the area of the border of orientation district 316A and 316B and the borderline dark line distribution of orientation district 316C and 316D and improve brightness.
Please refer to Fig. 9 D, the position angle of the alignment direction of four orientation district 316A, 316B, 316C and 316D is respectively 225 °, 315 °, 135 ° and 45 °.Can see this orientation mode by the Lower Half of Fig. 9 D time, simulate the light transmission state after inferior pixel region 316 voltage startings of gained, wherein there is obviously dark line on the border between the border between orientation district 316A and 316B and orientation district 316C and 316D.Now, can allow border between the corresponding orientation district 316A in position and the 316B of slit 312A and the border between orientation district 316C and 316D.By the effect of slit 312A, can improve the area of the borderline dark line distribution between border and orientation district 316C and the 316D between orientation district 316A and 316B and improve brightness.
In sum, in smooth alignment manufacture process of the present invention, the wave vector of linearly polarized light and the polarization direction mutual out of plumb of the projection on alignment materials layer is also not parallel, and therefore the incident direction of linearly polarized light can be adjusted to the edge of the photic zone that is parallel to mask, and then controls the direction of contraposition skew.In addition, by adjusting the distribution mode of alignment direction, can adopt the scanning type processing procedure of linearly polarized light Continuous irradiation and accelerate processing procedure speed and reduce bit errors.In addition, the both alignment layers of liquid crystal indicator of the present invention adopts aforesaid smooth alignment manufacture process, therefore can reduce processing procedure cost and promote display quality.
Although the present invention discloses as above with preferred embodiment; so it is not in order to limit the present invention, any those skilled in the art, without departing from the spirit and scope of the present invention; when doing a little amendment and perfect, therefore protection scope of the present invention is worked as with being as the criterion that claims were defined.
Claims (39)
1. a light alignment manufacture process, comprising:
On a substrate, form a smooth alignment materials layer, wherein the surface of this light alignment materials layer is one first plane; And
Irradiate this light alignment materials layer with a linearly polarized light, the wave vector of this linearly polarized light is a K vector, and this K vector forms one second plane with the normal vector of this first plane, it is characterized in that:
One polarization direction out of plumb of this linearly polarized light is also not parallel to this second plane.
2. smooth alignment manufacture process as claimed in claim 1, is characterized in that, the orthogonal projection of this polarization direction in this first plane is ψ with the angle of the absorption axes that is attached to the polaroid on this substrate
f, ψ
fbe essentially 45 degree, 135 degree, 225 or 315 degree.
3. smooth alignment manufacture process as claimed in claim 1, is characterized in that, this K vector is θ with the angle of the normal vector of this first plane, and θ is 40 degree.
4. smooth alignment manufacture process as claimed in claim 1, it is characterized in that, this linearly polarized light is to irradiate continuously this light alignment materials layer, in the time that this linearly polarized light irradiates this light alignment materials layer continuously, this K vector moves along a moving direction with an intersection point of this first plane, and orthogonal projection and this moving direction of this K vector in this first plane is overlapping.
5. smooth alignment manufacture process as claimed in claim 4, is characterized in that, the method that this intersection point is moved along this moving direction comprises fixes this substrate and mobile this linearly polarized light.
6. smooth alignment manufacture process as claimed in claim 4, is characterized in that, the method that this intersection point is moved along this moving direction comprises fixes this linearly polarized light and mobile this substrate.
7. smooth alignment manufacture process as claimed in claim 4, it is characterized in that, this substrate is divided into pixel region multiple times, each time pixel region comprises at least one subregion, each subregion is divided into multiple orientations district along the direction of vertical this moving direction, and the described orientation district forming a line along this moving direction is formed with identical alignment direction.
8. smooth alignment manufacture process as claimed in claim 7, is characterized in that, this substrate is rectangular substrate.
9. smooth alignment manufacture process as claimed in claim 7, is characterized in that, each pixel region is rectangle.
10. smooth alignment manufacture process as claimed in claim 7, is characterized in that, each subregion is divided into four orientation districts along the direction of vertical this moving direction.
11. smooth alignment manufacture process as claimed in claim 7, is characterized in that, each time pixel region comprises two subregions, and each subregion is divided into four orientation districts along the direction of vertical this moving direction.
12. smooth alignment manufacture process as claimed in claim 1, is characterized in that, this linearly polarized light is to irradiate steppingly this light alignment materials layer.
13. smooth alignment manufacture process as claimed in claim 12, is characterized in that, this substrate is divided into pixel region multiple times, and each time pixel region comprises at least one subregion, and each subregion is at least divided into four orientation districts by two separator bars that cross one another.
14. smooth alignment manufacture process as claimed in claim 13, is characterized in that, this substrate is rectangular substrate.
15. smooth alignment manufacture process as claimed in claim 13, is characterized in that, each pixel region is rectangle.
16. smooth alignment manufacture process as claimed in claim 13, is characterized in that, each subregion is divided into four orientation districts by two mutually perpendicular separator bars.
17. smooth alignment manufacture process as claimed in claim 13, is characterized in that, each time pixel region comprises two subregions, and each subregion is at least divided into four orientation districts by two separator bars that cross one another.
18. smooth alignment manufacture process as claimed in claim 1, is characterized in that, this linearly polarized light irradiates this light alignment materials layer via a mask.
19. smooth alignment manufacture process as claimed in claim 1, is characterized in that, this linearly polarized light is ultraviolet light.
20. 1 kinds of liquid crystal indicators, comprising:
One first substrate, has one first electrode layer and one first both alignment layers that covers this first electrode layer;
One second substrate, has a second electrode lay, it is characterized in that:
This first both alignment layers is carried out orientation with smooth alignment manufacture process as claimed in claim 1; And
One liquid crystal layer is disposed between this first both alignment layers of this first substrate and this second electrode lay of this second substrate.
21. liquid crystal indicators as claimed in claim 20, is characterized in that, this second substrate has more one second both alignment layers, and this second both alignment layers covers this second electrode lay, and this second both alignment layers is carried out orientation with smooth alignment manufacture process as claimed in claim 1.
22. liquid crystal indicators as claimed in claim 21, is characterized in that, the angle of the alignment direction in region corresponding to this first both alignment layers and this second both alignment layers is 180 degree.
23. liquid crystal indicators as claimed in claim 20, it is characterized in that, this first substrate is divided into pixel region multiple times, each time pixel region comprises at least one subregion, each subregion is divided into multiple orientations district along a side of described pixel region, and wantonly two orientation districts adjacent and that belong to different inferior pixel region have identical alignment direction.
24. liquid crystal indicators as claimed in claim 23, is characterized in that, more comprise two Polarizers, are pasted to respectively this first substrate and this second substrate, and wherein the angle of the alignment direction in the absorption axes of at least one Polarizer and at least one orientation district is 45 degree.
25. liquid crystal indicators as claimed in claim 23, is characterized in that, this first substrate is rectangular substrate.
26. liquid crystal indicators as claimed in claim 23, is characterized in that, each pixel region is rectangle.
27. liquid crystal indicators as claimed in claim 23, is characterized in that, the wantonly two adjacent and borders in orientation district that belong to different inferior pixel region are on same straight line.
28. liquid crystal indicators as claimed in claim 23, is characterized in that, each subregion is divided into four orientation districts along a side of described pixel region.
29. liquid crystal indicators as claimed in claim 28, is characterized in that, the position angle of the alignment direction in four orientation districts of each subregion is sequentially 225 °, 315 °, 45 ° and 135 °.
30. liquid crystal indicators as claimed in claim 29, is characterized in that, this first electrode layer has multiple slits, three borders in four orientation districts of the corresponding each subregion in position of described slit.
31. liquid crystal indicators as claimed in claim 29, is characterized in that, this first electrode layer has multiple slits, three borders in four orientation districts of the corresponding each subregion in the position of described slit at least one of them.
32. liquid crystal indicators as claimed in claim 28, is characterized in that, the position angle of the alignment direction in four orientation districts of each subregion is sequentially 225 °, 315 °, 135 ° and 45 ° or 225 °, 135 °, 315 ° and 45 °.
33. liquid crystal indicators as claimed in claim 32, is characterized in that, this first electrode layer has multiple slits, are positioned at two borders of both sides in three borders in four orientation districts of the corresponding each subregion in position of described slit.
34. liquid crystal indicators as claimed in claim 32, is characterized in that, this first electrode layer has multiple slits, in three borders in four orientation districts of the corresponding each subregion in the position of described slit, be positioned at both sides two borders at least one of them.
35. liquid crystal indicators as claimed in claim 28, is characterized in that, the position angle of the alignment direction in four orientation districts of each subregion is sequentially 225 °, 45 °, 315 ° and 135 °.
36. liquid crystal indicators as claimed in claim 35, is characterized in that, this first electrode layer has multiple slits, in three borders in four orientation districts of the corresponding each subregion in position of described slit, are positioned at central border.
37. liquid crystal indicators as claimed in claim 20, is characterized in that, this first substrate is divided into pixel region multiple times, and each time pixel region comprises at least one subregion, and each subregion is at least divided into four orientation districts by two separator bars that cross one another.
38. liquid crystal indicators as claimed in claim 37, is characterized in that, the position angle of the alignment direction in four orientation districts of each pixel region is respectively 225 °, 135 °, 45 ° and 315 ° along clockwise direction.
39. liquid crystal indicators as claimed in claim 37, is characterized in that, each time pixel region comprises two subregions, and each subregion is at least divided into four orientation districts by two separator bars that cross one another.
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| CN103733128B (en) * | 2011-08-12 | 2016-11-16 | 夏普株式会社 | Liquid crystal indicator |
| WO2017057210A1 (en) | 2015-10-02 | 2017-04-06 | シャープ株式会社 | Liquid crystal display panel, liquid crystal display panel manufacturing method, and liquid crystal display panel manufacturing device |
| US10509265B2 (en) | 2017-04-10 | 2019-12-17 | Shenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd. | Photo-alignment apparatus and photo-alignment method |
| CN106842717A (en) * | 2017-04-10 | 2017-06-13 | 深圳市华星光电技术有限公司 | Light alignment apparatus and light alignment method |
| CN107728387A (en) * | 2017-11-30 | 2018-02-23 | 赣州市秋田微电子有限公司 | One kind orientation film manufacturing method and its production equipment |
| CN109491148A (en) | 2019-01-08 | 2019-03-19 | 成都中电熊猫显示科技有限公司 | Light alignment method and light alignment apparatus |
| CN113867052B (en) * | 2021-09-09 | 2023-11-10 | 京东方科技集团股份有限公司 | Light alignment method of display panel, display panel and display device |
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