CN103513472A - Substrate, display device provided with substrate and manufacturing method of display device - Google Patents
Substrate, display device provided with substrate and manufacturing method of display device Download PDFInfo
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Abstract
The invention provides a substrate, a display device provided with the substrate and a manufacturing method of the display device. The substrate comprises base material and a patterned electrode. The patterned electrode is arranged on the base material and comprises a first area and a second area, the first area has a first azimuth angle region, and the second area has a second azimuth angle region. The electrode distribution azimuth angle of the first azimuth angle region is identical to the electrode distribution azimuth angle of the second azimuth angle region. A plurality of light reactants are arranged on the patterned electrode and used for enabling liquid crystal molecules making contact with the light reactants to be pre-tilted. When a voltage is not applied, the pre-tilt angles of the liquid crystal molecules in the first azimuth angle region are different from the pre-tilt angle of the liquid crystal molecules in the second azimuth angle region.
Description
Technical field
The invention relates to a kind of substrate with a patterned electrodes, and particularly relevant for a kind of display device and manufacture method thereof with this kind of substrate.
Background technology
In recent years, liquid crystal display has been widely used in the display screen of electronic product.Liquid crystal display has many different forms, comprise stable twisted nematic (Twisted Nematic, TN), supertwist is to row (Super Twisted Nematic, STN), plane is switched (In-Plane Switching, IPS), multizone homeotropic alignment (Multi-domain vertical alignment, MVA) etc.When applying voltage, can control the sense of rotation of liquid crystal molecule, and modulation polarisation of light direction, and then affect light throughput and cause the contrast of bright state and dark state as showing result.
Because TN escope and STN escope have the wide not problem in visual angle, MVA(multizone homeotropic alignment) liquid crystal display of form in response to and give birth to.MVA display system considers the demand of wide viewing angle, a kind of wide viewing angle display technique developing.By different electrode design and Region Segmentation, make liquid crystal molecule can have different tilt angles.And the liquid crystal of zones of different is subject to voltage and drives the liquid crystal molecule in Hou，Ge region towards different orientations, to rotate respectively.For instance, the liquid crystal molecule of supposing to be divided into ，Ze Sige region, Si Ge region can be distinguished Chao Sige position angle and rotate, and the visual angle of Si Ge up and down of display is compensated simultaneously.
When without extra electric field, the long axis of liquid crystal molecule of MVA liquid crystal display is being parallel to display screen unlike TN pattern system, and is perpendicular to display screen.And near the liquid crystal molecule of projected electrode slightly tilts, light now cannot pass upper and lower Polarizer.When extra electric field is when applying voltages to liquid crystal, liquid crystal molecule is swung to different directions, near liquid crystal molecule protrusion drives rapidly other liquid crystal to rotate with surperficial perpendicular to protrusion, make molecular long axis favour screen and promote the penetrance of light, make different position angles observe the compensation that display screen can obtain respective direction, improved visual angle.
Yet, do not carrying out under the prerequisite of optical compensation, MVA pattern is to the improvement at visual angle only for position angle, and other polar angles (with the folded angle of the planar process vector of screen) are still undesirable, and the observer of other polar angles may see the phenomenon of colour cast (Color Shft).So-called colour cast, refers to that observer watches the misalignment when departing from screen side and see over against screen.And, in the mode of electrically cutting apart, pixel is done to the extra wiring of Region Segmentation needs, pursuing under the display quality of high-res, easily make accurate small pixel littlely divided again, the aperture opening ratio of pixel is declined, and wiring (Layout) processing procedure difficulty.
Summary of the invention
The invention relates to a kind of substrate, there is display device and the manufacture method thereof of this kind of substrate.Substrate has a patterned electrodes, and it is identical that this patterned electrodes at least comprises that two ，Ci Liang districts, district respectively have the position angle of electrode spread of an angular region, ，Liang orientation, angular region, orientation, and the tilt angle that liquid crystal molecule is caused is different.
According to a first aspect of the invention, propose a kind of substrate, for a display device, substrate comprises base material and patterned electrodes.Patterned electrodes is located on base material, comprises first area and second area, and first area has first orientation angular region, and second area has second orientation angular region.The position angle of the electrode spread of first orientation angular region is identical with the position angle of the electrode spread of second orientation angular region.A plurality of light reaction things, are located on patterned electrodes, use so that the liquid crystal molecule pre-dumping contacting.When not applying voltage, the tilt angle of the liquid crystal molecule of first orientation angular region is different from the tilt angle of the liquid crystal molecule of second orientation angular region.
According to a second aspect of the invention, propose a kind of liquid crystal molecule display device, comprise one first base material and one second base material, a liquid crystal layer, a patterned electrodes and a plurality of light reaction thing relative with the first base material and that establish.Liquid crystal layer is located between the first base material and the second base material.Patterned electrodes is located on the first base material, and patterned electrodes comprises a first area and a second area, and first area has a first orientation angular region, and second area has a second orientation angular region.Light reaction thing, is arranged between first and second base material, uses so that these a little liquid crystal molecule pre-dumpings.The position angle of the electrode spread of first orientation angular region is identical with the position angle of the electrode spread of second orientation angular region, and the tilt angle of the liquid crystal molecule of first orientation angular region is different from the tilt angle of the liquid crystal molecule of second orientation angular region.
According to a third aspect of the invention we, propose a kind of manufacture method of liquid crystal molecule display device, method comprises the following steps.One first base material is provided.Form a patterned electrodes on the first base material, patterned electrodes comprises a first area and a second area, first area has a first orientation angular region, second area has a second orientation angular region, and the position angle of the electrode spread of first orientation angular region is identical with the position angle of the electrode spread of second orientation angular region.One second base material is provided.To organizing the first base material and the second base material.Form a liquid crystal layer and a plurality of light reaction thing between the first base material and the second base material.Liquid crystal layer is carried out to one and execute alive step.Liquid crystal layer and this little light reaction things are carried out to a step of exposure, make the tilt angle of liquid crystal molecule of first orientation angular region different from the tilt angle of the liquid crystal molecule of second orientation angular region.
Accompanying drawing explanation
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:
Figure 1A illustrates the diagrammatic cross-section according to the display device of one embodiment of the invention.
Figure 1B illustrates according to as the vertical view of the substrate of the display device of Figure 1A.
Fig. 1 C～1E illustrates the method flow diagram of cutting apart according to the multiple domain of one embodiment of the invention.
Fig. 2 A illustrates the schematic diagram according to the substrate of one embodiment of the invention.
Fig. 2 B illustrates the schematic diagram according to the tilt angle of the liquid crystal molecule of one embodiment of the invention and position angle relation.
Fig. 3 illustrates the method flow diagram of cutting apart according to the multiple domain of one embodiment of the invention.
Fig. 4 A～4B illustrates the method flow diagram of cutting apart according to the multiple domain of one embodiment of the invention.
Fig. 5 A～5B illustrates the method flow diagram of cutting apart according to the multiple domain of one embodiment of the invention.
Fig. 6 A～6B illustrates the method flow diagram of cutting apart according to the multiple domain of one embodiment of the invention.
Main element symbol description:
10,50: display device
100,200: substrate
102,112: polaroid
104,114,204: base material
106,106-1～106-3,116,206,306,406-1～406-2,506,606: electrode
106a～106c, 306a～306c, 406a～406d, G1～G4: region
406X, 406Y: sub-electrode
108,118,208: alignment film
209: light reaction thing
110: liquid crystal layer
110a, 210a: liquid crystal molecule
G11, G12, G13, G14, G21, G22, G23, G24, G31, G32, G33, G34, G41, G42, G43, G44: angular region, orientation
X, Y ,+P ,+K ,-P ,-K: axle
M1～M8: photomask
θ 1: tilt angle
φ: position angle
Embodiment
The first embodiment
Please refer to Figure 1A, it illustrates the diagrammatic cross-section according to the display device of one embodiment of the invention.As shown in Figure 1A, display device 10 comprises polaroid 102, base material 104, electrode 106, alignment film 108, liquid crystal layer 110, polaroid 112, base material 114, electrode 116 and alignment film 118.Electrode 106 can be comprehensive electrode or patterned electrodes.Electrode 116 can be comprehensive electrode or patterned electrodes.As long as electrode 106 or electrode 116 wherein one have patterned electrodes, do not limit and be patterned electrodes.Before not yet utilizing electric field and ultraviolet light polymerization light reaction thing, when without extra electric field, liquid crystal molecule (not illustrating) is perpendicular to alignment film 108.In this embodiment, liquid crystal layer 110 can comprise light reaction thing (not illustrating) doping.In another embodiment, light reaction thing also can be doped in alignment film 108.In another embodiment, light reaction thing also can be doped in alignment film 108 and liquid crystal layer 110 simultaneously.
In an embodiment, substrate 100 can comprise base material 104, electrode 106 and alignment film 108.Yet, in this, in order simplifying, only to show electrode 106, and to omit base material 104 and alignment film 108.Please refer to Figure 1B, it illustrates the vertical view according to the substrate 100 as the display device of Figure 1A, and the section of the display of Figure 1A is for example that the profile line 2-2 along Figure 1B cuts.As shown in Figure 1B, electrode 106 for example corresponds to a pixel region, and electrode 106 comprises region 106a, region 106b and region 106c.The part enlarged drawing system of region 106a is shown in the picture frame of dotted line, the arrangement mode of electrode 106a be for example along Figure 1B+P axle and+K axle arranges, and drive under voltage in applying, the liquid crystal molecule in Yin Ge region be subject to configuration of electrodes impact and respectively edge+P axle and+K axle arranges, and have an included angle with X-axis respectively, now the folded included angle of liquid crystal molecule and X-axis is the position angle of liquid crystal molecule.Because the position angle system of Liquid Crystal Molecules Alignment is subject to the impact of configuration of electrodes, so aftermentioned is all described the position angle angle of angular region, same orientation with the position angle of electrode spread.
In this embodiment, electrode 106 region 106a～region 106c, respectively comprises four kinds of different angular regions, orientation, respectively edge+P axle ,-P axle ,+K axle and-position angle that K axle is arranged.As shown in Figure 1B, electrode 106 region 106a has angular region, orientation G11(electrode edge+P axle and arranges), angular region, orientation G12(electrode edge+K axle arranges), the arrangement of angular region, orientation G13(electrode edge-P axle), the arrangement of angular region, orientation G14(electrode edge-K axle).Region 106b has angular region, orientation G21(electrode edge+P axle and arranges), angular region, orientation G22(electrode edge+K axle arranges), the arrangement of angular region, orientation G23(electrode edge-P axle) and the arrangement of angular region, orientation G24(electrode edge-K axle).Region 106c has angular region, orientation G31(electrode edge+P axle and arranges), angular region, orientation G32(electrode edge+K axle arranges), the arrangement of angular region, orientation G33(electrode edge-P axle) and the arrangement of angular region, orientation G34(electrode edge-K axle).
Consider the impact of processing procedure tolerance, the orientation angles of electrode spread can admit of a little error range, therefore, under operator scheme, is subject to the liquid crystal molecule that electrode spread affects also to have an azimuth coverage of allowing.The position angle of the electrode spread of angular region, orientation G11, equals in fact the position angle of the electrode spread of angular region, orientation G21, and equals in fact the position angle of the electrode spread of angular region, orientation G31.That is the position angle difference of the electrode spread of G11, G21 and G31 can not surpass 20 degree.The position angle of the electrode spread of angular region, orientation G12, equals in fact the position angle of the electrode spread of angular region, orientation G22, and equals in fact the position angle of the electrode spread of angular region, orientation G32.That is the position angle difference of the electrode spread of G12, G22 and G32 can not surpass 20 degree.Similarly, the position angle of the electrode spread of angular region, orientation G13, equals in fact the position angle of the electrode spread of angular region, orientation G23, and equals in fact the position angle of the electrode spread of angular region, orientation G33.That is the position angle difference of the electrode spread of G13, G23 and G33 can not surpass 20 degree.The position angle of the electrode spread of angular region, orientation G14, equals in fact the position angle of the electrode spread of angular region, orientation G24, and equals in fact the position angle of the electrode spread of angular region, orientation G34.That is the position angle difference of the electrode spread of G14, G24 and G34 can not surpass 20 degree.This angle difference system forms because of process variation.
For instance, position angle in the electrode spread of angular region, orientation G11 is for example 45 ° ± 10 °, position angle in the electrode spread of angular region, orientation G12 is for example 135 ° ± 10 °, the position angle that is for example the electrode spread of 225 ° ± 10°，Yu orientation angular region G14 in the position angle of the electrode spread of angular region, orientation G13 is for example 315 ° ± 10 °.That is, the position angle of the electrode spread of G11 is set as 45 degree, but because of variation impact on processing procedure, and can cause the position angle of the electrode spread in different regions or pixel Jian G11 district may have the positive and negative 10 error variation scopes (namely between positive and negative, difference is 20 degree) of spending.G12, G13 and G14 also have same situation.Similarly, position angle in the electrode spread of angular region, orientation G21 is for example 45 ° ± 10 °, position angle in the electrode spread of angular region, orientation G22 is for example 135 ° ± 10 °, the position angle that is for example the electrode spread of 225 ° ± 10°，Yu orientation angular region G24 in the position angle of the electrode spread of angular region, orientation G23 is for example 315 ° ± 10 °.And, position angle in the electrode spread of angular region, orientation G31 is for example 45 ° ± 10 °, position angle in the electrode spread of angular region, orientation G32 is for example 135 ° ± 10 °, the position angle that is for example the electrode spread of 225 ° ± 10°，Yu orientation angular region G34 in the position angle of the electrode spread of angular region, orientation G33 is for example 315 ° ± 10 °.So G11, G21JiG31 position angle are identical in fact, but because fabrication errors has the variations of positive and negative 10 degree, but error can not surpass 20 degree.The azimuth angle error of G12, G22 and G32 can not surpass 20 degree yet.Other identical in fact position angles also by that analogy.
In this angular region, embodiment Zhong， Xi Yisige orientation, it is example.In another embodiment, also viewable design demand and take the electrode design mode of angular region, Liang Ge orientation, for example two orientation angles can be in the display frame at visual angle, mutual compensation left and right.
In an embodiment, can utilize the mode of electric field and ultraviolet light polymerization to make liquid crystal molecule produce pre-dumping.Liquid crystal layer 110(is illustrated in Figure 1A) comprise light reaction thing.First, liquid crystal layer 110 is carried out and applied voltage and step of exposure, first apply a voltage with regulation and control Liquid Crystal Molecules Alignment direction.Then, irradiate a ultraviolet light, light reaction thing can be solidified to (curing) polymerization and be illustrated in Fig. 2 A in a plurality of light reaction thing 209(of alignment film (being illustrated in Figure 1A) surface formation).After step of exposure completes, even if when not being subject to Control of Voltage, the initial position of liquid crystal molecule can be subject to the light reaction thing after the polymerization on alignment film surface impact and and between alignment film surface, be arranged as the direction of tool one tilt angle, below explain cooperation is graphic.In the present embodiment, a plurality of light reaction thing structures lay respectively in upper and lower both sides substrate.But in another embodiment, the also focal position of capable of regulating UV light, make light reaction thing comparatively concentrate being formed on the substrate of a side wherein, and the ratio that opposite side substrate forms is less.
Fig. 1 C～1E illustrates the process flow diagram of cutting apart according to the multiple domain of one embodiment of the invention.Please refer to Fig. 1 C, apply one first voltage V1 to electrode 106-1, make region 106a to the liquid crystal molecule of region 106c, be subject to the electric field action of the first voltage V1 and arrange.One photomask M1 is set to electrode 106-1, photomask M1 is shaded areas 106b and region 106c.Then, carry out a step of exposure, now only have not to be subject to the region 106a that photomask M1 covers and to be subject to UV-irradiation, make in the liquid crystal layer 110 of region 106a or after the light reaction thing effect in alignment film polymerization in alignment film surface.Finally, remove that the first voltage V1 applies and the irradiation of ultraviolet light after.Now, in the 106a of region, the liquid crystal molecule of G12, orientation, angular region, G11, orientation, angular region, orientation G13Ji orientation, angular region angular region G14 has one first tilt angle.
After the polymerizable liquid crystal molecule that please then refer to Fig. 1 D ，Dang region 106a completes, apply a second voltage V2 to electrode 106-2, and a photomask M2 is set to electrode 106-2, photomask M2 is shaded areas 106a and region 106c.To substrate, 100(is illustrated in Figure 1A) carry out a step that applies voltage and exposure, make the liquid crystal molecule of G22, orientation, angular region, G21, orientation, angular region, orientation G23Ji orientation, the angular region angular region G24 of region 106b there is one second tilt angle.
Please refer to Fig. 1 E, apply a tertiary voltage V3 to electrode 106-3, and a photomask M3 is set to electrode 106-3, photomask M3 is shaded areas 106a and region 106b.To substrate, 100(is illustrated in Figure 1A) carry out a step that applies voltage and exposure, make the liquid crystal molecule of G32, orientation, angular region, G31, orientation, angular region, orientation G33Ji orientation, the angular region angular region G34 of region 106c there is one the 3rd tilt angle.Complete the Region Segmentation of 106a～region, region 106c.In addition, after the polymerization procedure of the light reaction thing of All Ranges completes, can be in not applying voltages under the prerequisite of electrode, again carry out single exposure step, be for example mode with slow by remaining light reaction thing polymerization, make the not light reaction thing of complete reaction can evenly be formed on all regions.
In this embodiment Zhong， first area 106a, second area 106b and San region 106c, be electrically connected to each other and not separated.Under the operator scheme in display frame, driving circuit (not showing) provides driving voltage Shi， first area 106a, second area 106b and San region 106c system accept same drive voltage and are driven.
In another embodiment, first area 106a, second area 106b and San region 106c can also be electrical separation each other, when applying voltage constantly in curing schedule, first area 106a, second area 106b and San region 106c independently receive identical or different voltage.Therefore, in applying voltage and step of exposure Zhong， first area 106a, second area 106b and San region 106c, can receive respectively different voltage regional exposure.Now, can independently regulate and control first area 106a, second area 106b and San region 106c the magnitude of voltage not applying and the different exposure intensities of regional exposure, adjust liquid crystal molecule in the pretilt angle of first area 106a, second area 106b and San region 106c.
In this embodiment, Yin Ge region receives respectively different voltage regional exposure, so under the operator scheme of display frame, driving circuit (not showing) provides driving voltage Shi， first area 106a, second area 106b and San region 106c system can accept identical or different driving voltage and be driven.
After the fabrication steps of Fig. 1 C～1E, the voltage V1 that region 106a, region 106b and region 106c accept while being subject to UV-irradiation respectively, voltage V2 and voltage V3 are neither identical, and the pretilt angle that makes to affect after the polymerization of light reaction thing liquid crystal molecule is also not identical.In other words, the tilt angle of the liquid crystal molecule in same area is identical, but liquid crystal molecule tilt angle between zones of different is different.That is, the position angle essence identical (difference angle is no more than 20 degree) of the electrode spread of angular region, the orientation G21 of angular region, orientation G11, the second area 106b of first area 106a and angular region, the orientation G31 of San region 106c, but the tilt angle of the liquid crystal molecule of G21Ji orientation, angular region, G11, orientation, angular region, orientation angular region G31 is different; The position angle essence identical (difference angle is no more than 20 degree) of the electrode spread of angular region, the orientation G22 of angular region, orientation G12, the second area 106b of first area 106a and angular region, the orientation G32 of San region 106c, but the tilt angle of the liquid crystal molecule of G22Ji orientation, angular region, G12, orientation, angular region, orientation angular region G32 is different; Angular relationship between G13, G23, G33 between angular relationship and G14, G24, G34 also in this way.
Thus, except 106a～region, region 106c originally has individually four kinds of different position angles, then collocation applies the so far mode of San Ge region and regional exposure of three kinds of different voltages, can reach the effect that 12 territories (Domains) are cut apart.Certainly, the number of regions of regional exposure can be adjusted to some extent according to the pattern difference of electrode, and regional exposure need to be matched with each region and apply different voltage to reach the effect that more multiple domain is cut apart, and makes the liquid crystal molecule in each territory all have different tilt angles.
In an embodiment, also can be in applying a voltage after electrode, the time shutter of regulation and control region 106a, region 106b and region 106c, by the general exposure bench of direct control, with different number of seconds, irradiate to control the time shutter, or with scanning type exposure board, carry out step of exposure and control the time shutter, reach the different extent of polymerization of light reaction thing, that is refer to that light reaction thing is formed at the roughness difference on each substrate, to adjust the angle of the tilt angle of liquid crystal molecule.
Fig. 2 A illustrates the microcosmic schematic diagram according to the substrate of one embodiment of the invention.Please refer to Fig. 2 A, substrate 200 comprises base material 204, electrode 206 and alignment film 208, and the light reaction thing 209 on alignment film 208 with polymerization distributes thereon.In Yu Bentu, only illustrate single side group plate, another subtend substrate omits.In another embodiment, on subtend substrate, also can there be alignment film 208 and light reaction thing 209.As shown in Figure 2 A, liquid crystal molecule 210a can be subject to polymerization light reaction thing 209 impact and arrange.Now, liquid crystal molecule 210a has a pretilt theta 1.In this defined pretilt theta 1, it can be the angle of long axis of liquid crystal molecule and alignment film normal to a surface vector.In this for convenience of description, according to normal proportionate relationship, do not illustrate light reaction thing and liquid crystal molecule, only illustrate the character shape in optical equivalence.In addition, the roughness of the light reaction thing 209 on substrate 200 surfaces is different, can affect the tilt angle of liquid crystal molecule 210a.The roughness system of light reaction thing 209 solidifies behind alignment film 208 surfaces with light reaction thing 209, the size of light reaction thing 209, highly, quantity, closeness and relevant with the angle on alignment film 208 surfaces.
Fig. 2 B illustrates the schematic diagram according to the tilt angle of the liquid crystal molecule of one embodiment of the invention and position angle relation.Please refer to Fig. 2 B, the plane that X-axis and Y-axis form is for example the set plane of electrode 206 of Fig. 2 A.The axial direction on electrode spread institute edge and the angle of X-axis are position angle φ, and the angle of the normal vector n of liquid crystal molecule 210a and X-Y plane is the pretilt theta 1 of liquid crystal molecule.
The second embodiment
In an embodiment, substrate can comprise base material, electrode and alignment film, in this for the purpose of simplifying the description, only shows electrode 306, and omits base material and alignment film.Please refer to Fig. 3, it illustrates the method flow diagram of cutting apart according to the multiple domain of another embodiment of the present invention.Please refer to Fig. 3, electrode 306 for example corresponds to a pixel region, and electrode 306 comprises region 306a, region 306b and region 306c, and trizonal configuration of electrodes is for example to arrange along P axle and K axle.
In this embodiment Zhong， region 306a, region 306b and region 306c, respectively comprise four kinds of different angular regions, orientation, these the four kinds different corresponding configuration of electrodes in angular region, orientation, have different position angles.Furthermore, the pattern of electrode 306 have respectively edge+P axle ,-P axle ,+K axle and-position angle that K axle is arranged.For instance, electrode 306 region 306a has angular region, orientation G11(electrode edge+P axle and arranges), angular region, orientation G12(electrode edge+K axle arranges), the arrangement of angular region, orientation G13(electrode edge-P axle) and the arrangement of angular region, orientation G14(electrode edge-K axle).Region 306b has angular region, orientation G21(electrode edge+P axle and arranges) and angular region, orientation G22(electrode edge+K axle arrange), the arrangement of angular region, orientation G23(electrode edge-P axle) and the arrangement of angular region, orientation G24(electrode edge-K axle).Region 306c has angular region, orientation G31(electrode edge+P axle and arranges), angular region, orientation G32(electrode edge+K axle arranges), the arrangement of angular region, orientation G33(electrode edge-P axle) and the arrangement of angular region, orientation G34(electrode edge-K axle).Arrangement mode and the position angle in electrode 306 corresponding each position angle districts, identical with the electrode 106 of Figure 1B, in this, repeat no more.
In this embodiment, can utilize the mode of electric field and ultraviolet light polymerization that light reaction thing is formed on alignment film and make liquid crystal molecule produce pre-dumping, the effect of cutting apart to reach multiple domain.First, liquid crystal layer is carried out and applied voltage and step of exposure, first apply a voltage with regulation and control Liquid Crystal Molecules Alignment direction, light reaction thing can be arranged along with liquid crystal molecule.Then, irradiate a ultraviolet light, light reaction thing can be solidified to (curing) polymerization in alignment film surface.So, when not being subject to Control of Voltage, the initial position of liquid crystal molecule can be subject to the impact of alignment film light responsive surface thing and and between alignment film surface, be arranged as the direction of tool one tilt angle.
Please refer to Fig. 3, apply one first voltage V1 to electrode 306, make region 306a to the liquid crystal molecule of region 306c, be subject to the electric field action of the first voltage V1 and arrange.One photomask M4 is set to electrode 306, photomask M4 is for example that a gray scale, half is adjusted (half-tone) photomask, and the shield coverage of photomask M4 region 306a, region 306b and region 306c is all not identical.For instance, photomask M4Dui region 306a is not had a screening effect ，Dui region 306b and is had 25% screening effect ，Qie Dui region 106c and have 50% screening effect.
Then, carry out a step of exposure, it is respectively that 100% penetrance, 75% penetrates and 50% penetrates that the ultraviolet light of this time domain 306a, region 306b and region 306c penetrates.The intensity that is subject to UV-irradiation due to region 306a, region 306b and region 306c is different, makes the polymerization of light reaction thing also different in the degree of alignment film.As a result, the tilt angle of liquid crystal molecule in region 306a, region 306b and region 306c is also not identical, reaches the effect that multiple domain is cut apart.In All Ranges after all polymerization completes, can be in not applying voltages under the prerequisite of electrode, again carry out single exposure step, be for example mode with slow by remaining light reaction thing polymerization, make the not light reaction thing of complete reaction can evenly be formed on all regions.
It should be noted that in this embodiment, before the step of executing alive step and photomask being set is executed in ultraviolet photoetching step, the order of executing alive step and the step of photomask being set is to exchange.
Thus, except 306a～region, region 306c originally has individually four kinds of different position angles, then collocation applies voltages to the mode of Ci Sange region and gray scale exposure, can reach the effect that 12 territories (Domains) are cut apart.Certainly, the photomask gray scale number of gray scale exposure and the arrangement mode of gray areas, can differently from process requirement according to the pattern of electrode adjust to some extent.Utilize gray scale, half light modulation mask, only need to apply after single voltage at electrode 306, with ultraviolet photoetching once, can reach the effect that multiple domain is cut apart, make the liquid crystal molecule in each territory all have different tilt angles, quite easy on processing procedure.
In this embodiment, first area 306a, second area 306b and San region 306c are electrically connected to each other and are not separated, when under operator scheme, driving circuit (not showing) provides driving voltage Shi， first area 306a, second area 306b and San region 306c system accept same drive voltage and are driven.Angular region, the orientation G11 of first area 306a, identical with angular region, the orientation G21 of second area 306b and G31 position angle, angular region, the orientation essence of San region 306c, but the tilt angle of liquid crystal molecule is different.Now, the magnitude of voltage applying respectively in the time of can regulating and controlling regional exposure and the exposure intensity of regional exposure, adjust liquid crystal molecule in the tilt angle of first area 306a, second area 306b and San region 306c.
In another embodiment, first area 306a, second area 306b and San region 306c can also be electrical separation each other, when under operator scheme, driving circuit (not showing) provides driving voltage Shi， first area 306a～San region 306c receive driving voltage independently of one another and driven.Therefore, while using UV photocuring light reaction thing, in applying voltage and step of exposure Zhong， first area 306a～San region 306c can receive respectively different voltage regional exposure.Now, can independently regulate and control magnitude of voltage that first area 306a, second area 306b and San region 306c apply individually and the exposure intensity of regional exposure, adjust liquid crystal molecule in the pretilt angle of first area 306a, second area 306b and San region 306c.
In an embodiment, also can be in applying a voltage after electrode 306, the time shutter of regulation and control region 306a, region 306b and region 306c, can directly control general exposure bench and irradiate to control the time shutter with different number of seconds, can also carry out step of exposure with scanning type exposure board and control the time shutter.By the different time shutter, reach the different extent of polymerization of light reaction thing.
The 3rd embodiment
In an embodiment, substrate can comprise base material, electrode and alignment film, in this for the purpose of simplifying the description, only shows electrode, and omits base material and alignment film.Fig. 4 A～4B illustrates the schematic top plan view according to the electrode structure of one embodiment of the invention.Please refer to Fig. 4 A, electrode 406-1 comprises sub-electrode 406X and sub-electrode 406Y, and sub-electrode 406X and sub-electrode 406Y correspond to respectively a subpixel area.Sub-electrode 406X comprises region 406a and region 406b, and sub-electrode 406Y comprises region 406c and region 406d.In another embodiment, the position of sub-electrode 406X and sub-electrode 406Y is interchangeable.
In this embodiment, 406a～region, the region of electrode 406-1 406d comprises four kinds of different angular regions, orientation, respectively edge+P axle ,+K axle ,-P axle and-position angle that K axle is arranged.For instance, the region 406a of electrode 406-1 has angular region, orientation G11(electrode edge+P axle and arranges), angular region, orientation G12(electrode edge+K axle arranges), the arrangement of angular region, orientation G13(electrode edge-P axle) and the arrangement of angular region, orientation G14(electrode edge-K axle).Region 406b has angular region, orientation G21(electrode edge+P axle and arranges) and angular region, orientation G22(electrode edge+K axle arrange), the arrangement of angular region, orientation G23(electrode edge-P axle) and the arrangement of angular region, orientation G24(electrode edge-K axle).Region 406c has angular region, orientation G31(electrode edge+P axle and arranges), angular region, orientation G32(electrode edge+K axle arranges), the arrangement of angular region, orientation G33(electrode edge-P axle) and the arrangement of angular region, orientation G34(electrode edge-K axle).Region 406d has angular region, orientation G41(electrode edge+P axle and arranges), angular region, orientation G42(electrode edge+K axle arranges), the arrangement of angular region, orientation G43(electrode edge-P axle) and the arrangement of angular region, orientation G44(electrode edge-K axle).Arrangement mode and the orientation angles in corresponding each position angle district of electrode 406-1, identical with the electrode 106 of Figure 1B, in this, repeat no more.
In this embodiment, liquid crystal layer comprises light reaction thing, utilizes the mode of electric field and ultraviolet light polymerization to make liquid crystal molecule produce pre-dumping.First, liquid crystal layer is carried out and applied voltage and step of exposure, first apply the first voltage V1 to electrode 406-1, to regulate and control Liquid Crystal Molecules Alignment direction, make light reaction thing along with liquid crystal molecule is arranged.One photomask M5 is set upper in electrode 406-1, photomask is shaded areas 406b and region 406d.The light reaction thing polymerization of then, irradiating a ultraviolet light Yi Jiang region 406a and region 406c is in alignment film surface.
Please then refer to Fig. 4 B, apply second voltage V2 to electrode 406-2, to regulate and control Liquid Crystal Molecules Alignment direction, make light reaction thing along with liquid crystal molecule is arranged.One photomask M6 is set upper in electrode 406-2, photomask is shaded areas 406a and region 406c.The light reaction thing polymerization of then, irradiating a ultraviolet light Yi Jiang region 406b and region 406d is in alignment film surface.
While being subject to ultraviolet light polymerization due to the region 406a of sub-electrode 406X and region 406b, apply voltage difference, and when being subject to ultraviolet light polymerization, the region 406c of sub-electrode 406Y and region 406d apply voltage difference, make the polymerization of light reaction thing in the size of alignment film, highly, quantity, closeness etc. are also different, that is roughness can be different.As a result, liquid crystal molecule is also not identical at the not identical ，Qie of tilt angle region 406c and the tilt angle in the 406d of region of region 406a and region 406b.After the light reaction thing polymerization procedure of All Ranges completes, can be in not applying voltages under the prerequisite of electrode, again carry out single exposure step, be for example mode with slow by remaining light reaction thing polymerization, make the not light reaction thing of complete reaction can evenly be formed on all regions.
Thus, 406a～region, the region of electrode 406X and 406Y 406d, except originally having individually four kinds of different position angles, then collocation applies the mode of two kinds of different voltages and regional exposure, can reach the effect that 16 territories (Domains) are cut apart.Certainly, photomask number of regions and the electrode of regional exposure are cut apart the mode with input voltage, can differently from process requirement according to the pattern of electrode adjust to some extent.
In this embodiment, the electrical separation of sub-electrode 406X and sub-electrode 406Y, it is not separated but the region 406a of sub-electrode 406X and region 406b are electrically connected to each other, the region 406c of sub-electrode 406Y and region 406d are electrically connected to each other and are not separated, region 406a and region 406b accept identical voltage, region 406c and region 406d accept identical voltage, exposure intensity during regulation and control regional exposure, adjusts liquid crystal molecule in the tilt angle of first area 406a, second area 406b, San region 406c and Si region 406d.G21 position angle, angular region, orientation essence in the G11 position angle, angular region, orientation of this embodiment Zhong， region 406a ，Yu region 406b is identical, but the tilt angle of liquid crystal molecule is different.And the G31 position angle, angular region, orientation of region 406c is identical with G41 position angle, angular region, the orientation essence of region 406d, but the tilt angle of liquid crystal molecule is different.G22 position angle, angular region, the orientation essence of G12 position angle, angular region, the orientation ，Yu region 406b of region 406a is identical, but the tilt angle of liquid crystal molecule is different.And the G32 position angle, angular region, orientation of region 406c is identical with G42 position angle, angular region, the orientation essence of region 406d, but the tilt angle of liquid crystal molecule is different.
Similarly, G23 position angle, angular region, the orientation essence of G13 position angle, angular region, the orientation ，Yu region 406b of region 406a is identical, but the tilt angle of liquid crystal molecule is different.And the G33 position angle, angular region, orientation of region 406c is identical with G43 position angle, angular region, the orientation essence of region 406d, but the tilt angle of liquid crystal molecule is different.G24 position angle, angular region, the orientation essence of G14 position angle, angular region, the orientation ，Yu region 406b of region 406a is identical, but the tilt angle of liquid crystal molecule is different.And the G34 position angle, angular region, orientation of region 406c is identical with G44 position angle, angular region, the orientation essence of region 406d, but the tilt angle of liquid crystal molecule is different.
Each other can also be electrically separated in another embodiment Zhong， first area 406a and second area 406b, and San region 406c and Si region 406d electrically separation each other.When driving circuit (not showing) provides driving voltage Shi， first area 406a～Si region 406d, receive driving voltage independently of one another and driven.Therefore, in applying voltage and step of exposure Zhong， first area 406a～Si region 406d can receive respectively different voltage regional exposure.Now, can independently regulate and control magnitude of voltage that first area 406a, second area 406b, San region 406c and Si region 406d apply individually and the exposure intensity of regional exposure, adjust liquid crystal molecule in the pretilt angle of first area 406a, second area 406b, San region 406c and Si region 406d, reach the effect that multiple domain is cut apart.
It should be noted that in this embodiment, before the step of executing alive step and photomask being set is executed in ultraviolet photoetching step, the order of executing alive step and the step of photomask being set is to exchange.
In an embodiment, also can regulate and control the time shutter of region 406a, region 406b, region 406c and region 406d in applying a voltage after electrode 406, reach the different extent of polymerization of light reaction thing.
The application of other electrode forms
The aforesaid embodiment of the present invention, be all to take the electrode of rice word pattern to explain as example, certainly, the present invention utilizes voltage and ultraviolet photoetching to come the mode of cut zone not limit the use of the rice font electrode in aforementioned list, still can be applied to the electrode of other rules or irregular pattern, for example, be rice font electrode or the > font electrode of elongation.
Fig. 5 A～5B illustrates the method flow diagram of cutting apart according to the multiple domain of one embodiment of the invention.As shown in Figure 5 B, the rice font electrode 506 that elongates of take explains as example, and photomask M7 shielded area is for example the central authorities that are arranged on electrode, and thus, regional exposure processing procedure can be divided into outer peripheral areas and zone line by the rice font electrode elongating.
Fig. 6 A～6B illustrates the method flow diagram of cutting apart according to the multiple domain of one embodiment of the invention.As shown in Figure 6B, the > font electrode 606 of take explains as example, the exposure photomask M8 of > font electrode has corresponding pattern, photomask M8 covers > font with right part, so that being divided into left and right two parts, > font electrode exposes, make region G1 and G2 have different tilt angle ，Er region G3 and G4 to have different tilt angles.
The > font electrode of the rice font electrode of the elongation of Fig. 5 A and Fig. 6 A, when exposure, need to be used the photomask of corresponding pattern to cover.Certainly, in this, only with photomask M7 and photomask M8, explain, actual processing procedure can carry out the form of design photomask according to demand, be not restricted.
By different photomask design, can be by electrode regional exposure by different way.
In sum, display device and the manufacture method thereof of the substrate of the above embodiment of the present invention, this substrate of tool, utilize electric field that voltage provides and the mode of ultraviolet photoetching, can provide be different from time division or electrically cut apart beyond multiple domain partitioning scheme.Owing to not needing extra wiring, can cut pixel region, pursuing under the display quality of high-res, can maintain the aperture opening ratio of pixel, do not need complicated processing procedure, can make to there is multiple tilt angle between liquid crystal molecule Ge territory, can reduce observer in the situation that departs from the colour cast that different polar angle is seen while just seeing, the view directions compensation that display device is wider is provided.If coordinate time division or space to cut apart, can also provide and more cut apart number to strengthen the effect of viewing angle compensation.
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 modification and perfect, so protection scope of the present invention is worked as with being as the criterion that claims were defined.
Claims (20)
1. a substrate, for a display device, this substrate comprises:
One base material;
One patterned electrodes, be located on this base material, this patterned electrodes comprises a first area and a second area, this first area has a first orientation angular region, this second area has a second orientation angular region, and the position angle of the electrode spread of this first orientation angular region is identical with the position angle of the electrode spread of this second orientation angular region; And
A plurality of light reaction things, are located on patterned electrodes, with so that the liquid crystal molecule pre-dumping contacting, wherein:
When not applying voltage, the tilt angle of the liquid crystal molecule of this first orientation angular region is different from the tilt angle of the liquid crystal molecule of this second orientation angular region.
2. substrate as claimed in claim 1, also comprises:
One alignment film, is arranged on this patterned electrodes.
3. substrate as claimed in claim 1, it is characterized in that, this patterned electrodes also comprises a San region, this San region has third party's parallactic angle district, the position angle of the electrode spread of this first orientation angular region is identical with the position angle of the electrode spread in this third party's parallactic angle district, and the tilt angle of the liquid crystal molecule of this first orientation angular region is different from the tilt angle of the liquid crystal molecule in this third party's parallactic angle district.
4. substrate as claimed in claim 1, it is characterized in that, this first area and this second area are to be arranged in a single pixel region or to be arranged in a single subpixel area, when Dang Gai first area and this second area are arranged in this single subpixel area, this patterned electrodes also comprises that a San region and a Si region are arranged in another single sub-pixel, this San region has third party's parallactic angle district, and this Si region has a cubic parallactic angle district, wherein
The position angle of the electrode spread in this third party's parallactic angle district is identical with the position angle of the electrode spread in this cubic parallactic angle district, and the tilt angle of the liquid crystal molecule in this third party's parallactic angle district is different from the tilt angle of the liquid crystal molecule in this cubic parallactic angle district.
5. substrate as claimed in claim 1, is characterized in that ，Gai first area and this second area are electrically connected and accept identical driving voltage.
6. substrate as claimed in claim 1, is characterized in that ，Gai first area and this second area electrically do not connect and accept different driving voltages.
7. a liquid crystal molecule display device, comprising:
One first base material and one second base material relative with this first base material and that establish;
One liquid crystal layer, is located between this first base material and this second base material;
One patterned electrodes, is located on this first base material, and this patterned electrodes comprises that a first area and a second area ，Gai first area have a first orientation angular region, and this second area has a second orientation angular region; And
A plurality of light reaction things, be arranged at this first and this second base material between, with so that described liquid crystal molecule pre-dumping, wherein:
The position angle of the electrode spread of this first orientation angular region is identical with the position angle of the electrode spread of this second orientation angular region, and the tilt angle of the liquid crystal molecule of this first orientation angular region is different from the tilt angle of the liquid crystal molecule of this second orientation angular region.
8. display device as claimed in claim 7, also comprises:
One alignment film, is arranged on this patterned electrodes.
9. display device as claimed in claim 7, is characterized in that, this patterned electrodes also comprises a San region, and this San region has third party's parallactic angle district, wherein:
The position angle of the electrode spread of this first orientation angular region is identical with the position angle of the electrode spread in this third party's parallactic angle district, and the tilt angle of the liquid crystal molecule of this first orientation angular region is different from the tilt angle of the liquid crystal molecule in this third party's parallactic angle district.
10. display device as claimed in claim 7, is characterized in that ，Gai first area and this second area are electrically connected and accept same drive voltage ，Huo Gai first area and this second area and electrically do not connect and accept not identical driving voltage.
11. display device as claimed in claim 7, it is characterized in that, this first area and this second area are to be arranged in a single pixel region or to be arranged in a single subpixel area, Dang Gai first area and this second area are while being arranged in this single subpixel area, this patterned electrodes also comprises that a San region and a Si region are arranged in another single sub-pixel, this San region has third party's parallactic angle district, and this Si region has a cubic parallactic angle district, wherein
The position angle of the electrode spread in this third party's parallactic angle district is identical with the position angle of the electrode spread in this cubic parallactic angle district, and the tilt angle of the liquid crystal molecule in this third party's parallactic angle district is different from the tilt angle of the liquid crystal molecule in this cubic parallactic angle district.
The manufacture method of 12. 1 kinds of liquid crystal molecule display device, the method comprises:
One first base material is provided;
Form a patterned electrodes on this first base material, this patterned electrodes comprises a first area and a second area, this first area has a first orientation angular region, this second area has a second orientation angular region, and the position angle of the electrode spread of this first orientation angular region is identical with the position angle of the electrode spread of this second orientation angular region;
One second base material is provided;
To organizing this first base material and this second base material;
Form a liquid crystal layer and a plurality of light reaction thing between this first base material and this second base material;
This liquid crystal layer is carried out to one and execute alive step; And
This liquid crystal layer and described light reaction thing are carried out to a step of exposure, make the tilt angle of liquid crystal molecule of this first orientation angular region different from the tilt angle of the liquid crystal molecule of this second orientation angular region.
The manufacture method of 13. liquid crystal molecule display device as claimed in claim 12, is characterized in that, before organizing this first base material and this second base material, also comprises and forms an alignment film on this patterned electrodes.
The manufacture method of 14. liquid crystal molecule display device as claimed in claim 12, is characterized in that, this step that applies voltage and this exposure comprises:
Apply the first voltage Yu Gai first area, and this first area of simultaneously exposing, make the liquid crystal molecule of this first orientation angular region there is this first tilt angle; And
Apply a second voltage in this second area, and this second area that simultaneously exposes, make the liquid crystal molecule in this third party's parallactic angle district there is this second tilt angle.
The manufacture method of 15. liquid crystal molecule display device as claimed in claim 12, is characterized in that, this exposure and execute alive step and comprise:
The liquid crystal molecule of alive step ，Shi Gai first area is executed in execution one and the liquid crystal molecule of this second area is subject to an identical voltage effect and produces pre-dumping; And
Provide a greyscale photo mask on this patterned electrodes, and carry out this step of exposure simultaneously, wherein this greyscale photo mask to should first area and this second area liquid crystal molecule with different penetrability ，Shi Gai first areas and this second area receive the ultraviolet light of different-energy intensity and make liquid crystal molecule produce different tilt angles.
The manufacture method of 16. liquid crystal molecule display device as claimed in claim 12, it is characterized in that, this first area and this second area are to be arranged in a single sub-pixel, this patterned electrodes also comprises that a San region and a Si region are arranged in another single sub-pixel, this San region has third party's parallactic angle district, this Si region has a cubic parallactic angle district, and this step that applies voltage and this exposure comprises:
Apply one first voltage Yu Gai first area and this San region, and expose this first area and this San region simultaneously; And
Apply a second voltage in this second area and this Si region, and expose this second area and this Si region simultaneously.
The manufacture method of 17. liquid crystal molecule display device as claimed in claim 12, is characterized in that, this patterned electrodes also comprises a San region, and this San region has third party's parallactic angle district, this exposure and execute alive step and comprise:
Apply the first voltage Yu Gai first area, and this first area of simultaneously exposing;
Apply second voltage in this second area, and this second area that simultaneously exposes; And
Apply tertiary voltage in this San region, and this San region of simultaneously exposing, make the tilt angle of the liquid crystal molecule of this first orientation angular region, the tilt angle of the liquid crystal molecule of this second orientation angular region is different from the tilt angle of the liquid crystal molecule in this third party's parallactic angle district.
The manufacture method of 18. liquid crystal molecule display device as claimed in claim 12, it is characterized in that, this patterned electrodes also comprises a San region, this San region has third party's parallactic angle district, this first area, this second area and this San region are electrically connected and accept same drive voltage, this exposure and execute alive step and comprise:
Carry out one and execute the liquid crystal molecule of alive step ，Shi Gai first area, the liquid crystal molecule pre-dumping in the liquid crystal molecule of this second area and this San region; And
Provide a greyscale photo mask on this patterned electrodes, and carry out an exposure manufacture process simultaneously, wherein this greyscale photo mask is to should first area, this second area and this San region has the different liquid crystal molecules of penetrability ，Shi Gai first area, the liquid crystal molecule in the liquid crystal molecule of this second area and this San region receives the ultraviolet light of different-energy intensity and produces different tilt angles.
The manufacture method of 19. liquid crystal molecule display device as claimed in claim 12, is characterized in that, this exposure and execute alive step and comprise:
Apply a voltage Yu Gai first area and this second area; And
Expose this first area and this second area, wherein the time shutter of this first area and this second area is different.
The manufacture method of 20. liquid crystal molecule display device as claimed in claim 19, it is characterized in that, the step of this first area and this second area of exposing is performed by one scan formula exposure bench, by different sweep times to regulate and control the time shutter of this first area and this second area.
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