CN102445788A - Optical alignment process and liquid crystal display device using the optical alignment process - Google Patents
Optical alignment process and liquid crystal display device using the optical alignment process Download PDFInfo
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Abstract
A photo-alignment process and a liquid crystal display device using the same. Wherein the photo-alignment process comprises the following steps. A layer of photo-alignment material is formed on a substrate. The alignment material layer is irradiated with a linearly polarized light. The surface of the photo-alignment material layer is a first plane. The wave vector of the linearly polarized light is a K vector. The K vector and the normal vector of the first plane form a second plane. A polarization direction of the linearly polarized light is neither perpendicular nor parallel to the second plane.
Description
Technical field
The invention relates to a kind of alignment manufacture process and the display device of using this alignment manufacture process, and particularly relevant for 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 the liquid crystal layer produces deflection because of effect of electric field; Make liquid crystal layer have light penetration rate, to show different gray scale pictures according to electric field level corresponding to this electric field.In addition, induce liquid crystal molecule to arrange 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 along specific direction.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 and to be easy to generate particulate (particle) pollution problems by scratch; Contactless alignment manufacture process so develop, like the light alignment manufacture process.The light alignment manufacture process is to produce the orientation effect with linearly polarized light irradiation both alignment layers.And the alignment direction of the decision of the direction during linearly polarized light incident both alignment layers, the tilt angle in the time of can influencing then with the angle of both alignment layers that liquid crystal molecule receives orientation afterwards during linearly polarized light incident.
Fig. 1 is the synoptic diagram of known alignment manufacture process, and Fig. 2 A and Fig. 2 B are the enlarged diagrams in two districts of Fig. 1.Please with reference to Fig. 1, have different alignment direction in order to make both alignment layers 110 at diverse location, the linearly polarized light 120 of different directions is irradiation both alignment layers 110 via a mask 130.And, moving substrate 140 or light source and make each district of both alignment layers 110 all receive the irradiation of linearly polarized light 120 and have specific alignment direction.The mask 130 general supports that only around it, receive board make it to keep at a distance with substrate 140.Along with the size increase of substrate 140 and the demand that shortens the processing procedure time, the size of mask 130 is done bigger and bigger.Yet mask 130 can produce bending because of gravity.In addition, the material of mask itself receives deflection easily, causes the mask 130 of diverse location different with distance between the both alignment layers 110.Under the identical condition of the incident angle of linearly polarized light 120, the external zones and the distance between the both alignment layers 110 of the mask 130 shown in Fig. 2 B are bigger, and the central area of the mask 130 shown in Fig. 2 A and the distance between the both alignment layers 110 are less.As stated, the incident light of general light alignment technique all can have an oblique incidence angle with respect to substrate and mask, yet 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, when the accurate contraposition of the central area of mask 130 and both alignment layers 110, will there be bit errors between the external zones of mask 130 and the both alignment layers 110, causes both alignment layers 110 to fail to obtain desirable orientation effect.
The relation of linearly polarized light and both alignment layers in the known light alignment manufacture process of Fig. 3 A explanation.Please, receive both alignment layers 110 to have tilt angle, can have an oblique incidence angle between the linearly polarized light 120 of known light alignment technique and the normal vector of both alignment layers 110 as the time spent in order to make liquid crystal molecule with reference to Fig. 3 A.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 is obtained is with wave vector 122, polarization direction 124 and normal vector 112 coplines, and the alignment direction 114 that both alignment layers 110 is obtained is parallel to the orthogonal projection of polarization direction 124 on 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 just must repeatedly adjust light supply apparatus (not illustrating) that linearly polarized light 120 is provided and the relative orientation between the substrate obtaining multiple different alignment direction on the both alignment layers 110; Increase the time cost of light alignment manufacture process, and increase the chance that fabrication errors takes place.
Fig. 3 B is the synoptic diagram of employed mask of the alignment manufacture process of Fig. 1 and light incident direction.Please with reference to Fig. 3 B, mask 130 has a plurality of photic zones 132, and these photic zones 132 are independent and continuous mutually.Linearly polarized light 120, can shine on the ideal and is located at the position that frame of broken lines 152 is enclosed through behind the photic zone 132 with the direction shown in the arrow.Yet, change and have a displacement error after causing linearly polarized light 120 through photic zone 132 because mask 130 bendings make it distance with substrate, be radiated at the position of being enclosed with frame of broken lines 152 different frame of broken lines 154.The position of frame of broken lines 154 all has side-play amount compared to the position of frame of broken lines 152 on X axle and Y axle.If two adjacent areas are the different alignment direction in the pixel, the offset deviation amount that mask 130 bendings cause may cause the zone of two adjacent different alignment directions to overlap each other, and the orientation effect is reduced.For example, the position of frame of broken lines 154 is linearly polarized light 120 zones through photic zone 132 back irradiations.After the position of frame of broken lines 156 was the zone of photic zone 132 lower left that moves on to current position owing to offset, linearly polarized light 120 was through the zone of photic zone 132 irradiations.Can overlap with frame of broken lines 156 by the visible frame of broken lines 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 then possibly take place fails not produced the problem of polarization direction by linearly polarized light 120.
In addition; Because cost and technical matters, the size of mask 130 can't be equal to the size of substrate 140 (being shown in Fig. 1), and mask 130 must repeatedly be located and illuminated line polarized light 120 with substrate 140; Could accomplish whole alignment manufacture process, cause the processing procedure cost to increase and the reduction process rate.For improving problems such as above-mentioned; Known technology has developed scan-type orientation method; Because of the light incident direction identical with the direction of scanning; Even if mask has bending in the direction that scanning extends in parallel, the alignment direction all because of the parallel direction of scanning is all consistent, reduces so scanning extends in parallel distortion's Influence of Displacement that bending caused of direction mask.Yet there is above-mentioned offset deviation equally in this scan mode; So being limited to can only be with the both alignment layers orientation one-tenth direction parallel with the direction of scanning; This mode is used in wide viewing angle vertical light alignment technique such as detorsion at present to row (Inverse Twisted Nematic, ITN) volume production of 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 advantages such as the liquid crystal reaction rate is very fast, so high at the application possibility in liquid crystal indicator future.The wide viewing angle ecb mode needs the alignment direction of four direction at least equally on general pixel; And differential seat angle 180 degree because of upper and lower base plate orientation in the ecb mode; So on same pixel (sub-pixel), need do the irradiation of four different incident light directions respectively, can have any problem so be designed to the orientation mode of scan-type.
Summary of the invention
The present invention provides a kind of smooth alignment manufacture process, can provide with the scan mode orientation and can obtain the alignment direction different with the direction of scanning.
The present invention provides a kind of liquid crystal indicator, and 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 irradiates light 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.The K vector constitutes one second plane with the normal vector on first plane.One polarization direction out of plumb of linearly polarized light also is not parallel to second plane.
In an embodiment of smooth alignment manufacture process of the present invention, the orthogonal projection of polarization direction on first plane is ψ with the angle that is attached to the absorption axes of the polaroid on the 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, the K vector is θ with the angle of the normal vector on first plane, and θ is 40 degree.
In an embodiment of smooth alignment manufacture process of the present invention; Linearly polarized light is an irradiates light alignment materials layer continuously; At linearly polarized light continuously during irradiates light alignment materials layer; The K vector moves along a moving direction with an intersection point on first plane, and orthogonal projection and the moving direction of K vector on first plane is overlapping.The method that intersection point is moved along moving direction comprises fixing base and the portable cord polarized light.The method that intersection point is moved along moving direction comprises the static line polarized light and moving substrate.Substrate is divided into pixel region a plurality of times, and each time pixel region comprises at least one subregion, and each subregion is divided into a plurality of orientations district along the direction of vertical moving direction, and the orientation district that forms a line along moving direction is formed with identical alignment direction.Substrate is a rectangular substrate.Each time pixel region is a rectangle.Each subregion is divided into four orientation districts along the direction of vertical moving direction.Each time pixel region comprises two subregions, and the direction of vertical this moving direction in edge is divided into four orientation districts.
In an embodiment of smooth alignment manufacture process of the present invention, linearly polarized light is an irradiates light alignment materials layer steppingly.Substrate is divided into pixel region a plurality of times, and each time pixel region comprises at least one subregion, and each subregion is divided into four orientation districts by two separator bars that cross one another at least.Substrate is a rectangular substrate.Each time pixel region is a 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 divided into four orientation districts by two separator bars that cross one another at least.
In an embodiment of smooth alignment manufacture process of the present invention, linearly polarized light is via a mask irradiates light alignment materials layer.
In an embodiment of smooth alignment manufacture process of the present invention, linearly polarized light is a ultraviolet light.
Liquid crystal indicator of the present invention comprises one first substrate, one second substrate and a liquid crystal layer.First substrate has one first electrode layer and one first both alignment layers that covers first electrode layer.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 the second electrode lay of first both alignment layers and 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 second both alignment layers covers the second electrode lay, and second both alignment layers is to carry out orientation like aforesaid smooth alignment manufacture process.The angle of the alignment direction in the zone that first both alignment layers and second both alignment layers are corresponding is 180 degree.
In an embodiment of liquid crystal indicator of the present invention; First substrate is divided into pixel region a plurality of times; Each time pixel region comprises at least one subregion; Each subregion is divided into a plurality of orientations district along a side of time pixel region, and wantonly two adjacent and orientation districts that belong to different inferior pixel region have identical alignment direction.Liquid crystal indicator more comprises two Polarizers, is pasted to first substrate and second substrate respectively, 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 a rectangular substrate.Each time pixel region is a 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 225 °, 315 °, 45 ° and 135 ° in regular turn.First electrode layer has a plurality of slits, three borders in four orientation districts of corresponding each time pixel region in the position of slit or one of them of three borders.The position angle of the alignment direction in four orientation districts of each time pixel region is 225 °, 315 °, 135 ° and 45 ° or 225 °, 135 °, 315 ° and 45 ° in regular turn.First electrode layer has a plurality of slits, is arranged in one of them of two borders of both sides or two borders that three borders are positioned at both sides in three borders in four orientation districts of corresponding each time pixel region in the position of slit.The position angle of the alignment direction in four orientation districts of each time pixel region is 225 °, 45 °, 315 ° and 135 ° in regular turn.First electrode layer has a plurality of slits, is positioned at the border of central authorities in three borders in four orientation districts of corresponding each time pixel region in the position of slit.
In an embodiment of liquid crystal indicator of the present invention, first substrate is divided into pixel region a plurality of times, and each time pixel region comprises at least one subregion, and each subregion is divided into four orientation districts by two separator bars that cross one another at least.The position angle of the alignment direction in four orientation districts of each time pixel region is respectively 225 °, 135 °, 45 ° and 315 ° along clockwise direction.Each time pixel region comprises two subregions, and each subregion is divided into four orientation districts by two separator bars that cross one another at least.
Based on above-mentioned; In smooth alignment manufacture process of the present invention; The wave vector that need not change linearly polarized light as long as change the polarization direction of linearly polarized light just can change the alignment direction of light alignment materials layer, thus can use the processing procedure of scan mode in the wide viewing angle electrically controlled birefringence mode, and can reduce the generation direction of bit errors; Also can promote the liquid crystal reaction rate, therefore can promote the display quality of liquid crystal indicator of the present invention.
Description of drawings
For let above-mentioned purpose of the present invention, feature and advantage can be more obviously understandable, elaborate below in conjunction with the accompanying drawing specific embodiments of the invention, wherein:
Fig. 1 is the synoptic diagram of known alignment manufacture process.
Fig. 2 A and Fig. 2 B are the enlarged diagrams in two districts of Fig. 1.
The relation of linearly polarized light and both alignment layers in the known light alignment manufacture process of Fig. 3 A explanation.
Fig. 3 B is the synoptic diagram of employed mask of the alignment manufacture process of Fig. 1 and light incident direction.
Fig. 4 explains 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 synoptic diagram of substrate of the mask below of Fig. 5.
Fig. 6 B is the synoptic 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 synoptic 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 synoptic diagram of the inferior pixel region of four kinds of embodiment.
Figure 10 is the light transmission state of simulation gained behind the inferior pixel region configuration slit of Fig. 9 B.
The 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: the polarization direction
130,230: mask
132,232: photic zone
132A: edge
140: substrate
152,154: frame of broken lines
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: first plane
P20: 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 second planar process vector
ψ
f: the orthogonal projection of polarization direction on first plane and the angle that is attached to the absorption axes of the polaroid on the substrate
The angle of the normal vector on θ: the K vector and 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 explains the relation of linearly polarized light and light alignment materials layer in the light alignment manufacture process of one embodiment of the invention.Please with reference to Fig. 4, the light alignment manufacture process of present embodiment is on a substrate 210, to form a smooth alignment materials layer 220 earlier, then with a linearly polarized light L10 irradiates light alignment materials layer 220, so that light alignment materials layer 220 has the orientation ability.The 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 property from sexual state out of order.Utilize the alignment materials of the molecules align of orderliness property can induce liquid crystal molecule orderliness property ground to arrange.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 direction of propagation that is used to represent the light wave of linearly polarized light L10.The normal vector on K vector and first plane (among Fig. 4 with the Z vector representation) constitutes one second plane P 20.The polarization direction D10 out of plumb of linearly polarized light L10 also is not parallel to 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 with reference to Fig. 4 and Fig. 5, mask 130 has the photic zone 132 of rectangle.Utilize the light alignment manufacture process of Fig. 4, projection such as the direction D20 of the K vector of linearly polarized light L10 on first plane P 10 of light alignment materials layer 220, and light alignment materials layer 220 receives linearly polarized light L10 irradiation back to produce an alignment direction D30.Alignment direction D30 can change via the polarization direction D10 of adjustment 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 angles, can reach preferable penetration.This angle may be because of fabrication errors but not is 45 degree just.Polarizer 230 is positioned on the different facial of substrate 210 with light alignment materials layer 220.Simultaneously, the projecting direction D20 of the K of linearly polarized light L10 vector is parallel to the edge 132A of photic zone 132.Therefore, even mask 130 has crooked phenomenon, also only can produce the contraposition skew, and can not produce the contraposition skew in the direction that is parallel to edge 132A in direction perpendicular to edge 132A.That is be to adopt the light alignment manufacture process of present embodiment can the influence of contraposition skew be confined to single direction and be easy to compensation.And, need not change the projecting direction D20 of the K vector of 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.
Followingly the polarization direction D10 of linearly polarized light L10 and the relation between the alignment direction D30 are described with reference to Fig. 4.The polarization state of K vector has P vector and S vector components, and the P vector is parallel to second plane P 20, S parallel first plane P 10 of vector and perpendicular to second plane P 20.Wherein, S is vectorial, P is vectorial and polarization direction D10 is positioned on one the 3rd plane P 30.The polarization direction D10 of linearly polarized light L10 must be perpendicular to the wave vector of linearly polarized light L10 (be the K vector, that is the direct of travel of linearly polarized light L10).The angle of polarization direction D10 and S vector is ψ
iAt this, angle ψ
iDefinition be to be the angle that benchmark is changeed when going to parallel polarization direction D10 with the S vector.The K vector is θ with the angle of the normal vector (being the Z vector) of first plane P 10.The angle of the absorption axes 232 of the Polarizer 230 that attaches on alignment direction D30 that light alignment materials layer 220 produces after shone by linearly polarized light L 10 and the substrate 210 is ψ
fAt this moment, 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 with reference to Fig. 4 and Fig. 5, the projecting direction D20 of the K of linearly polarized light L10 vector is parallel to the edge 132A of photic zone 132, can the contraposition skew is confined to single direction and be easy to compensation.With the mask 130 of Fig. 5, because each photic zone 132 does not link to each other, therefore after the orientation of accomplishing mask 130 pairing smooth alignment materials layers 220, the light source that just needs to move mask 130 and linearly polarized light L10 is provided is to carry out the light orientation to other zones.Certainly, but also 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 this step mobile and irradiation light hockets is called step-by-step movement.
Fig. 6 A is the synoptic diagram of substrate of the mask below of Fig. 5.Please with reference to Fig. 5 and Fig. 6 A.Substrate 210 is divided into pixel region 212 a plurality of 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 for example is 225 °, 135 °, 45 ° and 315 ° in regular turn, 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 is shown in arrow.The mode that inferior pixel region 218A is divided into a plurality of 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 with reference to Fig. 4 and Fig. 7 A, linearly polarized light L10 is an irradiates light alignment materials layer 220 continuously in the present embodiment.Continuously during irradiates light alignment materials layer 220, the K vector moves along a moving direction D22 with an intersection point Z10 of first plane P 10 at linearly polarized light L10.Orthogonal projection direction D20 and the moving direction D22 on first plane P 10 is overlapping for the K vector.In the present embodiment, each time 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, be formed with identical alignment direction along a plurality of orientations district that moving direction D22 forms a line.In the present embodiment, each time pixel region 216A, 216B, 216C are a straight line with 216D each border vertical with moving direction D22.Yet each time pixel region 216A, 216B, 216C also can not be a straight line with 216D each border vertical with moving direction D22, as long as the wantonly two adjacent and borders in orientation district that belong to different inferior pixel region are on same straight line.One or more orientations district that the photic zone 232 of mask 230 can align and form a line along moving direction D22.Because there is identical alignment direction in the orientation district of same row; Therefore light source and mask 230 that linearly polarized light L10 is provided are along moving direction D22 the time; Linearly polarized light L10 can carry out orientation to a plurality of orientations district that passes through continuously, need not adopt the mode of stepping do repeatedly to bit motion.So, can further save processing procedure time and cost.Simultaneously; Because orthogonal projection and the moving direction D22 of K vector on first plane P 10 is overlapping; The skew that therefore on moving direction D22, can't have the oblique irradiation of linearly polarized light L10 to be produced can reduce moving direction D22 has different contraposition side-play amounts because of mask 230 bendings zones of different on moving direction D22 is along the line problem.
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 is shown in arrow.These orientation districts 218E also can be divided into two or more groups up and down, 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 with reference to Fig. 8, the liquid crystal indicator 300 of 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 324 of both alignment layers 314 and substrate 320 of substrate 310.The angle of the alignment direction of both alignment layers 314 and 324 on zone in correspondence with each other for example is 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 both alignment layers 314 of present embodiment and 324 process rate is good and the processing procedure cost is lower, and then promote present embodiment liquid crystal indicator 300 display quality and reduce cost.
At this, substrate 320 can be a colored optical filtering substrates, and electrode layer 322 can be the common electrode layer, and substrate 310 can be an active elements array substrates, and electrode layer 312 can be a pixel electrode layer, perhaps also can adopt other appropriate configurations 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 synoptic diagram of the inferior pixel region of four kinds of embodiment.Please with reference 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 a plurality of 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 that the position angle of the alignment direction of four orientation district 316A, 316B, 316C and 316D is respectively 225 °, 315 °, 45 ° and 135 °.Light transmission state in the time of can seeing this orientation mode by the Lower Half of Fig. 9 A behind inferior pixel region 316 voltage startings of simulation gained.At this moment, can on electrode layer 312, be formed with a plurality of slit 312A, at least one in respectively three borders between four orientation district 316A and 316B of corresponding each time pixel region 316 in the position of slit 312A, between 316B and 316C, between 316C and 316D.Certainly, also can be designed with slit on the electrode layer 322.By the marginal electric field action of slit 312A, accelerate liquid crystal receive the speed of arranging behind the 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 and improve brightness.
Please with reference 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 °.Light transmission state in the time of can seeing this orientation mode by the Lower Half of Fig. 9 B behind inferior pixel region 316 voltage startings of simulation gained, wherein only there is dark line on the border between orientation district 316B and 316C.At this moment, can let the corresponding orientation district 316B in position of slit 312A and the border between 316C.The effect of electric field by slit 312A limit, accelerate liquid crystal receive the speed of arranging behind the voltage and improve orientation district 316B and 316C borderline dark line distribution area and improve brightness, shown in figure 10.
Please with reference 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 °.Light transmission state in the time of can seeing this orientation mode by the Lower Half of Fig. 9 C behind inferior pixel region 316 voltage startings of simulation gained, wherein there is obviously secretly line on the border between the border between orientation district 316A and 316B and orientation district 316C and 316D.At this moment, can let the corresponding orientation district 316A in position and border between 316B and the border between orientation district 316C and 316D of slit 312A.The effect of electric field by slit 312A limit, accelerate liquid crystal receive the speed of arranging behind the voltage and improve orientation district 316A and 316B border and orientation district 316C and 316D borderline dark line distribution area and improve brightness.
Please with reference 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 °.Light transmission state in the time of can seeing this orientation mode by the Lower Half of Fig. 9 D behind inferior pixel region 316 voltage startings of simulation gained, wherein there is obviously secretly line on the border between the border between orientation district 316A and 316B and orientation district 316C and 316D.At this moment, can let the corresponding orientation district 316A in position and border between 316B and the border between orientation district 316C and 316D of slit 312A.By the effect of slit 312A, can improve the area that the borderline dark line between border and orientation district 316C and the 316D between orientation district 316A and 316B distributes 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 the alignment materials layer is also not parallel, so the incident direction of linearly polarized light can be adjusted to the edge of the photic zone that is parallel to mask, and then the direction of control contraposition skew.In addition, the distribution mode by the adjustment alignment direction can adopt the scanning type processing procedure of linearly polarized light Continuous irradiation and accelerates 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 the processing procedure cost and promote display quality.
Though the present invention discloses as above with preferred embodiment; Right its is not that any those skilled in the art are not breaking away from the spirit and scope of the present invention in order to qualification the present invention; When can doing a little modification and perfect, so protection scope of the present invention is when being as the criterion with what claims defined.
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| WO2018188163A1 (en) * | 2017-04-10 | 2018-10-18 | 深圳市华星光电半导体显示技术有限公司 | Optical alignment device and optical alignment method |
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