CN105404060B - Liquid crystal display panel - Google Patents
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- CN105404060B CN105404060B CN201410464403.1A CN201410464403A CN105404060B CN 105404060 B CN105404060 B CN 105404060B CN 201410464403 A CN201410464403 A CN 201410464403A CN 105404060 B CN105404060 B CN 105404060B
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Abstract
The present invention proposes a kind of liquid crystal display panel, has at least one pixel region, and include: first electrode layer, the second electrode lay and liquid crystal layer.First electrode layer and the second electrode lay are located in pixel region.Liquid crystal layer is between first electrode layer and the second electrode lay.Wherein, liquid crystal layer has the first pre-tilt angle close to the liquid crystal molecule of first electrode layer, and liquid crystal layer has the second pre-tilt angle close to the liquid crystal molecule of the second electrode lay, and the second pre-tilt angle is substantially greater than the first pre-tilt angle.
Description
Technical field
The invention relates to a kind of display devices, and in particular to a kind of liquid crystal display panel (curved
liquid crystal display panel)。
Background technique
Figure is frivolous, low power consumption and radiationless because having for flat display apparatus (Flat Panel Display, FPD)
Etc. advantageous characteristics, gradually replace conventional cathode ray tube (Cathode Ray Tube, CRT) display device be applied to
In various electronic product.But as consumer electrical product designer trends are by the art based on function sexual deviation novelty and fashion
Sexual development, industry has been developed that the liquid crystal display device with curved surface at present.
In general plane liquid crystal display panel processing procedure, because glass substrate stress causes using can solidity reactant monomer
(reactive monomer), the polyimides formed with optics orientation (photo align) technology in liquid crystal layer two sides
(polyimide, PI) alignment film or polymer-stabilized alignment (Polymer-stabilized alignment, PSA) design and
The liquid crystal molecule liquid crystal optic axis changing of the relative positions being anchored, it will usually generate asking for reversion orientation field in adjacent orientation field intersection
Topic.With multi-zone vertical alignment nematic (multi-domain vertically alignment, MVA) formula LCD display of wide viewing angle
For plate, by polymer-stabilized alignment layer anchoring (anchored) if liquid crystal molecule occur the changing of the relative positions, the liquid crystal light of liquid crystal molecule
Axis can generate reversion orientation field (inverse domain) in the intersection of adjacent orientation field (domains), and cause to match
Additional dark line is generated to field intersection, seriously affects the display quality of liquid crystal display panel.
Identical problem also occurs in curved surface liquid crystal display device.The method of known manufacture curved surface liquid crystal display device,
It is that stress is directly applied to flat liquid crystal display panel, makes liquid crystal display panel that curved state be presented.When stress be applied to it is flat
When face liquid crystal display panel causes glass substrate to be bent, since its side of curved surface liquid crystal display panel has at least one curvature half
The curvature of diameter, liquid crystal display panel two panels glass substrate after bending is different, can make the phase of the vertical light-emitting surface of two panels glass substrate
Displacement is generated to position, the degree in turn resulting in the liquid crystal molecule liquid crystal optic axis changing of the relative positions being anchored becomes larger, and image quality is impacted
Degree more be more than general plane liquid crystal display panel.
Therefore, in need that a kind of advanced liquid crystal display panel is provided, to improve known technology problem encountered.
Summary of the invention
Of the invention one is towards relating to a kind of liquid crystal display panel.This liquid crystal display panel has at least one picture
Plain visible area (pixel active area), and include: first electrode layer, the second electrode lay and liquid crystal layer.First electrode layer
It is located in pixel region with the second electrode lay.Liquid crystal layer is between first electrode layer and the second electrode lay.Wherein, liquid crystal layer is close
The liquid crystal molecule of first electrode layer has the first pre-tilt angle, and liquid crystal layer has the second pre-dumping close to the liquid crystal molecule of the second electrode lay
Angle, and the second pre-tilt angle is substantially greater than the first pre-tilt angle.
Of the invention another is towards relating to a kind of liquid crystal display panel.This liquid crystal display panel has at least one
Pixel region, and include: first electrode layer, the second electrode lay, liquid crystal layer, first polymer film and second polymer film.
First electrode layer and the second electrode lay are all located in pixel region.Liquid crystal layer is between first electrode layer and the second electrode lay.The
One thin polymer film contacts between liquid crystal layer and first electrode layer, and with liquid crystal layer.Second polymer film is located at liquid
Between crystal layer and the second electrode lay, and contacted with liquid crystal layer.Wherein, both first polymer film and second polymer film
Infrared ray (Infra-Red, IR) absorption spectrum, in wave number between 800cm-1To 2000cm-1Between, have not
Same characteristic absorption peak (absorption peaks).
Another of the invention has at least one pixel region, this is bent towards a kind of liquid crystal display panel is related to
Face liquid crystal display panel includes: first electrode layer, the second electrode lay and liquid crystal layer.First electrode layer and the second electrode lay all positions
In pixel region.Liquid crystal layer is between first electrode layer and the second electrode lay, and liquid crystal layer includes multiple first directions liquid crystal
And multiple second directions liquid crystal.Wherein the second direction liquid crystal accounts for the area of pixel region, and the substantially greater than first direction liquid crystal accounts for picture
The area in plain area, and then Formation of liquid crystals asymmetry orientation field (domain) is directed toward with first.When liquid crystal display panel is presented most
When illuminated state, only there is a dark line in asymmetric orientation field, this dark line has a dark line brightness, the brightness value of this dark line brightness
The brightness value of curved surface liquid crystal display panel most illuminated state of the essence value lower than 75%.
According to above-mentioned, one embodiment of the invention is to provide a kind of liquid crystal display panel, is in two panels glass substrate phase
Pair both side surface on form two electrode layers, and two kinds of polymer film is respectively formed on electrode layer, to being located in two
Liquid crystal layer between electrode layer carries out orientation.Since the chemical composition of this two kinds of thin polymer films is not identical, liquid crystal layer can be made
Liquid crystal molecule close to two Side-electrode layers is respectively provided with different pre-tilt angles.In some embodiments of the invention, close to opening
The liquid crystal molecule of the biggish electrode layer of rate has the biggish pre-tilt angle of essence.In other embodiments of the invention, aforementioned two
The difference of the chemical composition of kind of thin polymer film, can by infrared absorption spectrum in wave number between 800cm-1To 2000cm-1
Between different characteristic absorption peak be verified.
It in some embodiments of the invention, is that aforementioned two kinds of polymer film is applied into the Multi-domain Vertical of wide viewing angle
In direction matching type liquid crystal display board.By the liquid crystal display using the liquid crystal molecule close to two Side-electrode layers with different pre-tilt angles
Panel can improve in known liquid crystal display panel processing procedure, because glass substrate stress leads to the liquid crystal molecule liquid crystal light being anchored
The axis changing of the relative positions, and reversion orientation field is led to the problem of in adjacent asymmetric orientation field intersection.
So only will appear one between adjacent asymmetric orientation field when most illuminated state is presented in liquid crystal display panel
Brightness value is substantially lower than the dark line of the maximum brightness value of 75% liquid crystal display panel most illuminated state, without generating additional dark line
Problem can improve the bad problem of certainly known liquid crystal display panel display quality.By disclosed herein technical characteristic utilization
In curved surface liquid crystal display panel, the problem of known curved surface liquid crystal display panel display quality deteriorates more can obviously improve.
Detailed description of the invention
For the above objects, features and advantages of the present invention can be clearer and more comprehensible, below in conjunction with attached drawing to tool of the invention
Body embodiment elaborates, in which:
Figure 1A is that an embodiment according to the present invention is painted a kind of flat liquid crystal for making curved surface liquid crystal display panel
The structural profile illustration of display panel；
Figure 1B is then to be painted to be formed by curved surface liquid crystal display panel by the flat liquid crystal display panel of bending Figure 1A
Structural profile illustration；
Fig. 2 is the infrared ray absorbing light of two kinds of polyimide polymer films depicted in an embodiment according to the present invention
Spectrogram；
Fig. 3 A is that a kind of flat liquid crystal display panel for making curved surface liquid crystal display panel is painted according to known technology
Structural profile illustration；
Fig. 3 B is then to be painted to be formed by curved surface liquid crystal display panel by the flat liquid crystal display panel of bending Fig. 3 A
Structural profile illustration；
Fig. 4 A is the pixel kenel for being painted the illuminated state display picture of known liquid crystal display panel；
Fig. 4 B is intensity map depicted in arrow direction C4 along Fig. 4 A；
Fig. 5 is the cross-sectional view of the structure of curved surface liquid crystal display panel depicted according to another embodiment of the present invention.
Component label instructions in figure:
100: curved surface liquid crystal display panel 100 ': flat liquid crystal display panel
101: pixel region 101a: the first sub-pixel area
101b: the second sub-pixel area 102: first substrate
103: the second substrate 104: first electrode layer
104a: the surface 105 of first electrode layer: the second electrode lay
105a: the surface 106 of the second electrode lay: liquid crystal layer
106a: liquid crystal molecule 106b: liquid crystal molecule
107: first polymer film 108: second polymer film
109: narrower bore 300: curved surface liquid crystal display panel
300 ': flat liquid crystal display panel 307: first polymer film
308: second polymer film 400: curved surface liquid crystal display panel
401a: orientation field 401b: orientation field
401c: orientation field 401d: orientation field
500: curved surface liquid crystal display panel 508: second polymer film
A: characteristic absorption peak B: characteristic absorption peak
C4: arrow direction C5: arrow direction
R1: the boundary R2: the boundary in orientation field in orientation field
R3: the boundary Z in orientation field11: liquid crystal optic axis
Z12: liquid crystal optic axis Z12': liquid crystal optic axis
Z31: liquid crystal optic axis Z32: liquid crystal optic axis
Z51: liquid crystal optic axis Z52: liquid crystal optic axis
Z52': liquid crystal optic axis PI I: broken line
PI II: broken line θ1: pre-tilt angle
θ2: pretilt theta2': pre-tilt angle
θ52: pretilt theta51: pre-tilt angle
Specific embodiment
The present invention is to provide a kind of liquid crystal display panel, and the certainly known liquid crystal display panel display quality of improvement is bad to ask
Topic.In order to be clearer and more comprehensible to the above embodiment of the present invention and other objects, features and advantages, it is cited below particularly several preferable
Embodiment, and institute's accompanying drawings is cooperated to elaborate.
But it must be noted that these specific case study on implementation and method, be not intended to limit the invention.The present invention still may be used
It is implemented using other features, element, method and parameter.The it is proposed of preferred embodiment is only of the invention to illustrate
Technical characteristic, the protection scope being not intended to limit the invention.Those of ordinary skill in the technical field, can be according to following theory
The description of bright book is not departing from scope of the invention, makees impartial modification and variation.Different embodiments and attached drawing it
In, identical element will be indicated with identical component symbol.
The production method of curved surface liquid crystal display panel 100, which includes the following steps: to provide first, has at least one pixel region
The flat liquid crystal display panel 100 ' of (such as pixel region 101)；Imposing external force to flat liquid crystal display panel 100 ' again keeps its curved
It is bent.Please refer to Figure 1A, it is a kind of for making curved surface liquid crystal display panel 100 that Figure 1A is that an embodiment according to the present invention is painted
The structural profile illustration of flat liquid crystal display panel 100 '.
In some embodiments of the invention, flat liquid crystal display panel 100 ' can be a kind of multidomain vertical alignment type liquid
LCD panel.Wherein, flat liquid crystal display panel 100 ' includes: first substrate 102, the second substrate 103, first electrode layer
104, the second electrode lay 105, liquid crystal layer 106, first polymer film 107 and second polymer film 108.
In some preferred embodiments of the invention, first substrate 102 and the second substrate 103 are preferably glass substrate, and
First substrate 102 and the second substrate 103 are be parallel to each other (but not limited to this).First electrode layer 104 and the second electrode lay 105
It is located on first substrate 102 and the second substrate 103, and first electrode layer 104 faces the second electrode lay 105.First electrode
The material of layer 104 and the second electrode lay 105, preferably tin indium oxide (Indium Tin Oxide, ITO).
First polymer film 107 is formed in first electrode layer 104；Second polymer film 108 is formed in the second electricity
On pole layer 105；And first polymer film 107 faces second polymer film 108.Constitute first polymer film 107 and the
The material of dimerization object film 108 can be identical or different.Among some embodiments of the present invention, first polymer film
107 and second polymer film 108 be preferably all polyimides (polyimide, PI) film.
Liquid crystal layer 106 is between first polymer film 107 and second polymer film 108.Of the invention some
Among embodiment, first polymer film 107 is formed in first electrode layer 104 on the surface 104a of the second electrode lay 105,
And it is directly contacted with the liquid crystal molecule of liquid crystal layer 106；Second polymer film 108 faces first in the second electrode lay 105
On the surface 105a of electrode layer 104, and directly contacted with the liquid crystal molecule of liquid crystal layer 106.
Among the embodiment of the present invention, first electrode layer 104 and the second electrode lay 105 are located at flat liquid crystal display panel
Among 100 ' pixel region 101.For the sake of clear explanation, spy lifts single a pixel region of flat liquid crystal display panel 100 '
101 are illustrated.In detail, pixel region 101 is the minimum display unit in flat liquid crystal display panel 100 '.Flat liquid crystal
It include the pixel array (pixel array) that at least one is made of multiple pixel regions 101 in display panel 100 '.Pixel battle array
Each of column pixel region 101 all (can not be drawn by the black matrix" (black matrix) for being covered in 102 top of first substrate
Show) it is defined.
In some embodiments of the invention, first electrode layer 104 can be the pixel of flat liquid crystal display panel 100 '
The common electrode (common electrode) in area 101；The second electrode lay 105 is then the pixel electrode of pixel region 101.Wherein,
First electrode layer 104 in pixel region 101 has complete surface；And it is located at the second electrode lay 105 in pixel region 101
Then there is multiple narrower bore (slits) 109 or opening.
But the embodiment of the present invention is not limited thereto, among other embodiments of the invention, first electrode layer 104
Surface also can have at least one narrower bore (slits) or opening (not being painted).And the opening on 105 surface of the second electrode lay is close
Spending (i.e. the ratio that the area of narrower bore or opening accounts for the area of the second electrode lay 105) can be greater than on 104 surface of first electrode layer
The opening density of narrower bore.Implying that is, has in the per unit area on 105 surface of the second electrode lay than 104 surface of first electrode layer
Bigger narrower bore 109 or opening area.In addition among other embodiment of the invention, the biggish second electrode of opening density
Layer 105, is also possible to the common electrode of the pixel region 101 of flat liquid crystal display panel 100 '；And opening density lesser first
Electrode layer 104 is also possible to the pixel electrode of the pixel region 101 of flat liquid crystal display panel 100 '.
In the present embodiment, multiple slits (i.e. above-mentioned opening) 109 on 105 surface of the second electrode lay can be used as liquid crystal layer
106 orientation field orientation adjustment component (domain regulators), to adjust matching for liquid crystal molecule in pixel region 101
To orientation (orientation).For example, the liquid crystal molecule in pixel region 101 can move towards inclination orientation according to slit 109,
Single a pixel region 101 is divided into multiple sub-pixel areas, such as the first sub-pixel area 101a and the second sub-pixel area 101b,
And then form single a pixel region 101 can when applying voltage includes more (at least two) a orientation with different alignment orientation
Field (domains) obtains the performance of wide viewing angle whereby.
In detail, liquid crystal layer 106 is influenced by 109 topographical surface of slit, close to the liquid crystal molecule of the second electrode lay 105
106b can be respectively provided with the liquid crystal optic axis of different inclined directions in the first sub-pixel area 101a and the second sub-pixel area 101b
Z12And Z12'.Second polymer film 108 include it is multiple can solidity molecule can solidity by photocuring or thermal cure step
Molecule is solidified, and by liquid crystal optic axis Z12And Z12' inclined direction be anchored and remained unchanged.
In addition, first electrode layer 104 and the second electrode lay 105 all have completely among some embodiments of the present invention
Surface.In such case, the orientation processing of first electrode layer 104 and the second electrode lay 105 includes, in pixel region 101
Different zones, such as the first sub-pixel area 101a and the second sub-pixel area 101b, liquid crystal layer 106 apply not same electric field respectively,
So as to making the liquid crystal optic axis of liquid crystal molecule in the different areas, such as Z12And Z12' rotate and be respectively provided with different inclined directions,
And it has angle with 103 shape of the second substrate.At the same time, to 108 irradiation light of second polymer film, such as irradiating ultraviolet light
(Ultra-Violet, UV) or heating, can make in second polymer film 108 can solidity reactant monomer monomer
(reactive monomer) connection (crosslink) interactively with each other, and make liquid crystal layer 106 close to second electrode 105 (second is poly-
Close object film 108) liquid crystal molecule 106b liquid crystal optic axis Z12And Z12' anchoring.When no longer bestowing voltage, the liquid that is anchored
Brilliant optical axis Z12And Z12' will remain unchanged with angle folded by first substrate 103.
In detail, among some embodiments of the present invention, before not carrying out orientation processing, first polymer film
107 and second polymer film 108 can be first by rotary coating (spin coating) mode or by printing
(printing) mode, by polyimide material, conformally (conformal) blanket is overlying on first electrode layer 104 and the second electricity respectively
On the surface 104a and 105b of pole layer 105.In the present embodiment, only in the polyimide material of second polymer film 108
Doped with can solidity reactant monomer list, the polyimide material of first polymer film 107 do not include it is any can solidity it is anti-
Answer object monomer monomer.
The orientation of first polymer film 107 is handled, and can be by the way of rubbing (rubbing), in polyamides
Imines film surface forms very low power (not being painted), to induce the liquid crystal molecule 106a of liquid crystal layer 106 along frictional direction assortment.
Or the Kapton of the polymer with photo-hardening type is irradiated with the ultraviolet light of polarization, generate the destruction of strand with
It resets, causes surface very low power, and then control the arrangement of liquid crystal molecule.Also or using superlaser or ion beam in certain party
To irradiation Kapton, so that its surface is generated removing, cause the effect of surface grooves, reach the mesh of liquid crystal alignment
's.Or can use in being mixed in liquid crystal layer or thin polymer film reactive monomer (reactive monomer), it penetrates
Making alive guidance LCD alignment direction is simultaneously used up or thermal response, is made monomer reaction, is reached orientation pre-tilt angle.
Since first polymer film 107, which just has, to carry out liquid crystal layer 106 to do pre-tilt angle orientation, therefore can't make to lean on
The liquid crystal optic axis Z of a part of liquid crystal molecule 106a of nearly first polymer film 10711The phenomenon that generating anchoring.It is noticeable
It is that the orientation processing mode of first polymer film 107 is not limited thereto, it is any to make to generate pre-dumping to liquid crystal layer 106
Angle.
The orientation of second polymer film 108 is handled, then be to 108 irradiating ultraviolet light of second polymer film or heating,
Make in second polymer film 108 can solidity reactant monomer and a part of liquid crystal point close to second polymer film 108
Sub- 106b generates polymerization, and makes close to its liquid crystal light of the liquid crystal molecule 106b of the second electrode lay 105 (second polymer film 108)
Axis Z12And Z12' be anchored, and a scheduled angle, such as θ are pressed from both sides between the second substrate 103 respectively2With-θ2' (hereinafter referred to as
For pretilt theta2With-θ2’)。
It is worth noting that, although in the present embodiment, first polymer film 107 and second polymer film 108 are all
It is to be made of polyimides, and can not be differentiated by entity structure.But due to only having in second polymer film 108
Be mixed with can solidity reactant monomer, therefore this two kinds of polymer thin membranizations can be still differentiated by infrared absorption spectrum analysis
Learn the difference on composition.
Referring to figure 2., Fig. 2 is that two kinds of polyimide polymer films depicted in an embodiment according to the present invention are infrared
Line absorption spectrogram.Fig. 2 is observed it can be found that in wave number essence between 2000cm-1To 4000cm-1Between, two kinds of polyimides
(broken line PI I represents the infrared absorption spectrum of first polymer film 107 to thin polymer film, and broken line PI II represents the second polymerization
The infrared absorption spectrum of object film 108) other than absorption intensity difference, the characteristic absorption spike shape essence of absorption spectrum
It is identical.The difference for studying and judging absorption intensity should be that caused result is influenced by process conditions.
In wave number essence between 800cm-1To 2000cm-1Between, first polymer film 107 and second polymer film
Just there is quite apparent difference at 108 characteristic absorption peak.This section of infrared absorption spectrum range, it can show the first polymerization
The difference of polyimide monomers material substantially in object film 107 and second polymer film 108.For example, infrared ray absorbing
Spectrum broken line PI II is respectively 1368cm in wave number-1And 1490cm-1There is apparent characteristic absorption peak A and B respectively in position, and
Infrared absorption spectrum broken line PI I is in the position then without any characteristic absorption peak.It can verify that: second polymer film 108
Polyimide monomers are substantially different with first polymer film 107.
In detail, infrared absorption spectrum is in wave number in 1368cm-1Characteristic absorption peak A represent the bond of C-H, in wave number
In 1720cm-1Characteristic absorption peak B, then represent C=C bond.The difference of broken line PI I and broken line PI II can illustrate: constitute the
In the polyimide monomers of dimerization object film 108, also additionally comprising other with can solidity reactant monomer interactive connection key
Knot.It is important to note, however, that the present invention for aforementioned two kinds of thin polymer film chemical compositions detection method not as
Limit.Any difference that both can detecte out chemical composition or can detecte out can solidity reactant monomer method, all do not take off
From spirit and scope of the invention.
Referring again to Figure 1A, via the liquid crystal layer after 108 orientation of first polymer film 107 and second polymer film
106, it can be parallel orientation (homogeneous) liquid crystal layer, vertical orientation (homeotropic) liquid crystal layer or torsion orientation row
Arrange (twisted) liquid crystal layer.Wherein, liquid crystal layer 106 is close to its liquid crystal optic axis of the liquid crystal molecule 106a of first electrode layer 104 Z11With
Pretilt theta is accompanied between first substrate 1021；Liquid crystal layer 106 close to the second electrode lay 105 liquid crystal molecule 106b, first son
In pixel region 101a, liquid crystal optic axis Z12Pretilt theta is pressed from both sides between the second substrate 1032；In the second sub-pixel area 101b,
Liquid crystal optic axis Z12' and the second substrate 103 between press from both sides pre-tilt angle-θ2.Wherein, pretilt theta1Substantially 90 °, preferably between
Between 89.9 ° to 90 °.Pretilt theta2Essentially less than 89.9 ° and be less than pretilt theta1.In some embodiments of the invention, pre-dumping
Angle θ2It is preferably substantially greater than and is equal to 80 ° of degree and less than 89.9 °.
In the present embodiment, first polymer film 107 is a vertical orientation film.Therefore, when not yet being applied to liquid crystal layer 106
When adding any voltage, close to the liquid crystal molecule 106b's of the second electrode lay 105 (second polymer film 108) in liquid crystal layer 106
Liquid crystal optic axis Z12And Z12' and the second substrate 103 between pre-tilt angle be respectively θ2With-θ2.In other words, close in liquid crystal layer 106
The liquid crystal optic axis Z of the liquid crystal molecule 106a of first electrode layer 10411With the pretilt theta between first substrate 1021It is vertical to approach
Orientation.
Liquid crystal point when applying voltage to liquid crystal layer 106, in the first sub-pixel area 101a and the second sub-pixel area 101b
The liquid crystal optic axis Z of sub- 106b12And Z12' can topple over towards different directions, and make the first sub-pixel area 101a and the second sub-pixel area
There is liquid crystal molecule in 101b different liquid crystal to be directed toward.For example, in the first sub-pixel area 101a liquid crystal molecule liquid crystal light
Axis is oriented to a bottom right left side；The liquid crystal optic axis of liquid crystal molecule is oriented to the lower-left right side in second sub-pixel area 101b, and then is formed
Include more (at least two) a orientation field with different alignment orientation.And in R1A liquid crystal is generated at (as wire indicates)
The boundary toppled over.Among the present embodiment, pixel region 101 is located at two neighboring orientation field (the first sub-pixel area 101a and
Two sub-pixel area 101b) boundary R1The liquid crystal molecule (as wire indicates) at place, when bestowing voltage, not by first electrode
The electric field of layer 104 and the second electrode lay 105 influences, and liquid crystal optic axis is vertical with first substrate 102 and the second substrate 103 respectively.
Figure 1B is please referred to, Figure 1B is to be painted to be formed by curved surface liquid by the flat liquid crystal display panel 100 ' of bending Figure 1A
The structural profile illustration of LCD panel 100.When the bending of 100 ' stress of flat liquid crystal display panel, due to first substrate
102 and the second substrate 103, the curvature of the two is different, other than the arc core of curved surface, compared to flat state, and vertical first base
The relative position of plate 102 and the second substrate 103 can generate relative displacement, this leads to the liquid crystal molecule in liquid crystal layer 106, also can be with
The displacement of first substrate 102 and the second substrate 103 and rearrange.But since most liquid crystal molecule is not gathered by second
Object film 108 is closed to be anchored.Therefore other than the liquid crystal molecule 106b that second polymer film 108 is anchored, in liquid crystal layer 106
The LCD alignment that the LCD alignment and first polymer film 107 of other liquid crystal molecules are arranged in pairs or groups is still vertical orientation, therefore
It can't see LCD alignment because first substrate 102 and 103 stress of the second substrate lead to the problem of relative displacement and make mistakes.
In some embodiments of the invention, there is aduncate a side of curved surface liquid crystal display panel 100 essence to be situated between
Radius of curvature between 500 millimeters to 10000 millimeters.For example, in the present embodiment, 100 stress of curved surface liquid crystal display panel
And curved the second substrate 103 has the radius of curvature substantially between 750 millimeters.However in other embodiment of the invention
In, the bending direction of curved surface liquid crystal display panel 100 can be different.For example, stress and in curved the second substrate 103
Heart point can be outwardly protruded or be inwardly concaved.And curved surface liquid crystal display panel 100 can have not only one in yet other embodiments,
A curved surface, for example, after the second substrate 103 curves inwardly, be spaced a distance among some embodiments of the present invention, it can
To be bent outwardly again, and forming the surface of curved surface liquid crystal display panel 100 has at least two cambered surfaces, and shape is like wavy fluctuating
Topographic structure.Wherein, no matter first substrate 102 and the second substrate 103 are inwardly or outwardly bent, respective radius of curvature can
With identical or different.
In detail, since the liquid crystal molecule 106a directly contacted with first polymer film 107 is not anchored,
When one substrate 102 and 103 stress of the second substrate generate relative displacement, liquid crystal molecule 106a does not change, liquid crystal optic axis Z11Side
To still along 107 surface vertical orientation of first polymer film.In other words, the liquid crystal optic axis Z of liquid crystal molecule 106a11Direction still
It is vertical with first substrate 102；The pretilt theta of liquid crystal molecule 106a1It is still 90 ° of essence.
Opposite, due to the liquid crystal molecule 106b directly contacted with second polymer film 108, liquid crystal optic axis Z12By anchor
Due on second polymer film 108.Therefore, it when first substrate 102 and 103 stress of the second substrate generate relative displacement, leans on
The liquid crystal molecule 106b of nearly the second electrode lay 105 (second polymer film 108) can generate relative displacement with the second substrate 103
(being as shown in Figure 1B to be moved to the left).Due to the liquid crystal optic axis Z of liquid crystal molecule 106b after displacement12And Z12' and the second substrate
Pre-tilt angle between 103 is still respectively θ2With-θ2.So being rearranged after being displaced with first substrate 102 and the second substrate 103
Liquid crystal molecule, liquid crystal optic axis and the pre-tilt angle folded by first substrate 102 and the second substrate 103 of liquid crystal molecule do not change
Become.
100 ' difference of flat liquid crystal display panel before curved surface liquid crystal display panel 100 and stress are displaced is only that, as
The intersection in two neighboring orientation field in plain area 101, meeting R1 as depicted in Figure 1A are moved to R2 depicted in Figure 1B.When right
When the application voltage of curved surface liquid crystal display panel 100 is shown, it is extra that the boundary R2 in two neighboring orientation field can't be generated
Dark line.After the boundary movement in two orientation fields, it is located at boundary before dark line number and the stress displacement of boundary R2
The dark line number of R1 is identical, therefore will not influence the display quality of pixel region 101.
It is compared again with known 300 plate of curved surface LCD display.A to Fig. 3 B referring to figure 3., Fig. 3 A are known to
Technology is painted a kind of structural profile signal for making the flat liquid crystal display panel 300 ' of curved surface liquid crystal display panel 300
Figure.Fig. 3 B is then to be painted to be formed by curved surface liquid crystal display panel 300 by the flat liquid crystal display panel 300 ' of bending Fig. 3 A
Structural profile illustration.Wherein, the structure of flat liquid crystal display panel 300 ' is greatly to aobvious with flat liquid crystal depicted in Figure 1A
Show that panel 100 ' is similar, difference is only that the first polymer film 307 of 300 ' two sides of flat liquid crystal display panel and second gathers
Close object film 308 be all containing can solidity reactant monomer Kapton.
When 300 ' stress of flat liquid crystal display panel is bent, as depicted in Fig. 3 B, due to polymerizeing in liquid crystal layer 106 with first
The liquid crystal molecule 106a and 106b that object film 307 and second polymer film 308 directly contact, liquid crystal optic axis Z31And Z32All
It is anchored on 308 surface of first polymer film 307 and second polymer film respectively.Therefore, when first substrate 102 and
When two substrates, 103 stress generates relative displacement, the liquid crystal optic axis Z of two sides liquid crystal molecule 106a and 106b31And Z32, it also can be with
Generate opposite direction the changing of the relative positions, and then in pixel region 301 two neighboring orientation field intersection R3 generate reversion orientation
Field, and cause the dark line of the intersection R3 in orientation field to expand, and there may be additional dark lines.
A and Fig. 4 B referring to figure 4., Fig. 4 A are the pictures for being painted the illuminated state display picture of known curved surface liquid crystal display panel 400
Plain kenel.Fig. 4 B is intensity map depicted in arrow direction C4 along Fig. 4 A.By Fig. 4 A it can be observed that liquid crystal display
The pixel region 401 of panel 400 includes 4 orientation fields 401a, 401b, 401c and 401d.It is because of first substrate 102 and second
103 stress of substrate generates relative displacement, and makes adjacent orientation field that appearance asymmetrical relative to one another be presented (as the wire of Fig. 4 A is drawn
Show, orientation field 401a and 401b, that is, asymmetrical relative to one another).And in addition to the intersection in two adjacent orientation fields, such as orientation
The intersection R3 of field 401a and 401b occur outside an obvious dark line, and in addition appearance is more among orientation field 401c and 401b
Dark line.As depicted in Fig. 4 B, the brightness value of the dark line brightness of these dark lines is all substantially most lower than curved surface liquid crystal display panel 400
The 75% of the maximum brightness value of illuminated state.In addition, the brightness Distribution value among orientation field 401a and 401b is also quite unequal, and
The dark line width of adjacent orientation field 401c and 401b intersection R3 also obviously expand.This display: liquid crystal display panel 400 exists
After first substrate 102 and 103 stress of the second substrate generate relative displacement, display quality is substantially reduced.Similarly, when known song
After the bending of face liquid crystal display panel stress, the aobvious degradation depending on quality will be more obvious.
In conclusion although 100 stress of curved surface liquid crystal display panel depicted in this case Figure 1B is bent and makes pixel region 101
Appearance asymmetrical relative to one another is presented in interior orientation field, but the intersection R1 in adjacent orientation field does not generate additionally dark
Line, therefore the display quality of curved surface liquid crystal display panel 100 is not influenced.Known liquid crystal display panel 400 is reviewed because of upper and lower base plate (the
One substrate 102 and the second substrate 103) stress generation relative displacement, i.e., in adjacent orientation field 401c and 401b intersection R3
Generate the dark line that width obviously expands and quantity increased significantly.Accordingly, it more can verify that using curved surface liquid crystal provided by the present invention
Display panel 100 can solve the bad problem of known 400 display quality of curved surface liquid crystal display panel.
In addition, Fig. 5 is a kind of curved surface liquid crystal display depicted according to another embodiment of the present invention referring again to Fig. 5
The cross-sectional view of the structure of panel 500.Curved surface LCD display depicted in the structure and Figure 1B of its mean camber liquid crystal display panel 500
The structure of plate 100 is similar, and the second polymer film 508 that difference is only that in curved surface liquid crystal display panel 500 can be stabilization
Orientation (Polymer-stabilized alignment, PSA) polymeric layer.
The formation of second polymer film 508, not by rotary coating or the mode of printing directly in the second electrode lay
High molecular material is coated on 105.But first can solidity reactant monomer, such as acryl monomer is mixed into liquid crystal material；Again
Voltage is applied to liquid crystal layer 106 through first electrode layer 104 and the second electrode lay 105, makes liquid crystal layer 106 close to the second electrode lay
105 liquid crystal molecule 106b and acryl monomer are because of polymerization induced phase separation (phase disengagement), and in the second electricity
Pole 105 surface of layer form the polymer thin film of liquid crystal molecule, and make the liquid crystal optic axis Z of polymerized liquid crystal molecules 106b52And Z52' according to
Predetermined angular, such as pretilt theta52With-θ52, arrangement.
In the present embodiment, liquid crystal molecule can be made by irradiating angle, position and the exposure dose of control ultraviolet light
Copolymerization film is only formed on the surface 105a of the second electrode lay 105.And it can solidity reactant list using not having as previously described
The Kapton of body makes the liquid crystal of the liquid crystal molecule 106a close to first electrode layer 104 as first polymer film 107
Optical axis Z51The surface of first polymer film 107 will not be anchored to.Therefore, in 103 stress of first substrate 102 and the second substrate
After generating relative displacement, the liquid crystal optic axis Z of liquid crystal molecule 106a51It is still vertical with first substrate 102.This means, it is leaned in liquid crystal layer 106
The liquid crystal optic axis Z of the liquid crystal molecule 106a of nearly first electrode layer 10451With the pretilt theta between first substrate 10251It is still 90 °.
Since the structure and production method of the other elements of curved surface liquid crystal display panel 500 have been described in detail as above, therefore, not repeat them here.
According to above-mentioned, one embodiment of the invention is to provide a kind of liquid crystal display panel, is in two panels glass substrate phase
Pair both side surface on form two electrode layers, and two kinds of polymer film is respectively formed on electrode layer, to being located in two
Liquid crystal layer between electrode layer carries out orientation.Since the chemical composition of this two kinds of thin polymer films is not identical, liquid crystal layer can be made
Liquid crystal molecule close to two Side-electrode layers is respectively provided with different pre-tilt angles.In some embodiments of the invention, close to opening
The liquid crystal molecule of the biggish electrode layer of density has the biggish pre-tilt angle of essence.It is aforementioned in other embodiments of the invention
The difference of the chemical composition of two kinds of polymer film, can by infrared absorption spectrum in wave number between 800cm-1Extremely
2000cm-1Between different characteristic absorption peak be verified.
It in some embodiments of the invention, is the multi-domain vertical alignment that aforementioned two kinds of polymer film is applied to wide viewing angle
Into formula liquid crystal display panel.By the LCD display using the liquid crystal molecule close to two Side-electrode layers with different pre-tilt angles
Plate can improve in known liquid crystal display panel processing procedure, because glass substrate stress leads to the liquid crystal light for the liquid crystal molecule being anchored
The axis changing of the relative positions, and reversion orientation field is led to the problem of in adjacent asymmetric orientation field intersection.
So only will appear one between adjacent asymmetric orientation field when most illuminated state is presented in liquid crystal display panel
Brightness value is substantially lower than the dark line of the maximum brightness value of 75% liquid crystal display panel most illuminated state, without occur dark line expand or
Additional dark line is led to the problem of, the bad problem of certainly known liquid crystal display panel display quality can be improved.It will be disclosed herein
Technical characteristic apply to curved surface liquid crystal display panel, more can obviously improve known curved surface liquid crystal display panel display quality and deteriorate
The problem of.
Although the present invention is disclosed as above with preferred embodiment, however, it is not to limit the invention, any this field skill
Art personnel, without departing from the spirit and scope of the present invention, when can make a little modification and perfect therefore of the invention protection model
It encloses to work as and subject to the definition of the claims.
Claims (1)
1. a kind of liquid crystal display panel has an at least pixel region, comprising:
One first electrode layer is located in the pixel region；
One the second electrode lay is located in the pixel region；
One liquid crystal layer, between the first electrode layer and the second electrode lay；
One first polymer film contacts between the liquid crystal layer and the first electrode layer, and with the liquid crystal layer；And
One second polymer film contacts between the liquid crystal layer and the second electrode lay, and with the liquid crystal layer；
The wherein infrared absorption spectrum of both the first polymer film and the second polymer film, wave number between
800cm-1To 2000cm-1Between, there is different characteristic absorption peaks.
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| CN201910113774.8A CN109613765B (en) | 2014-09-12 | 2014-09-12 | Liquid crystal display panel |
| CN201410464403.1A CN105404060B (en) | 2014-09-12 | 2014-09-12 | Liquid crystal display panel |
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| TWI584023B (en) * | 2016-08-16 | 2017-05-21 | 友達光電股份有限公司 | Liquid crystal display panel and liquid crystal alignment method thereof |
| CN106686423B (en) | 2016-12-30 | 2018-03-20 | 惠科股份有限公司 | A kind of multi-picture display method and display device |
| US10325963B2 (en) * | 2017-02-24 | 2019-06-18 | Innolux Corporation | Display device |
| CN106918955B (en) * | 2017-05-11 | 2019-09-13 | 京东方科技集团股份有限公司 | A kind of smooth alignment apparatus and method, liquid crystal display panel |
| CN109581753A (en) * | 2018-12-28 | 2019-04-05 | 成都中电熊猫显示科技有限公司 | Liquid crystal display panel |
| CN111752051B (en) * | 2019-03-29 | 2023-12-19 | 夏普株式会社 | Liquid crystal display panel and method for manufacturing the same |
| CN110196518A (en) * | 2019-06-10 | 2019-09-03 | 成都中电熊猫显示科技有限公司 | Alignment method, liquid crystal display panel and the display device of liquid crystal display panel |
| CN112711148A (en) * | 2019-10-25 | 2021-04-27 | 鸿富锦精密工业（深圳）有限公司 | Liquid crystal display panel |
| CN111025772A (en) * | 2019-12-11 | 2020-04-17 | Tcl华星光电技术有限公司 | Flexible display panel, manufacturing method thereof and display device |
| CN110928016B (en) * | 2019-12-13 | 2022-02-22 | 武汉华星光电技术有限公司 | Display panel, display device and manufacturing method of display device |
| CN111240100B (en) * | 2020-03-06 | 2021-07-06 | Tcl华星光电技术有限公司 | Bendable liquid crystal display panel and preparation method thereof |
| CN111781774B (en) * | 2020-07-13 | 2021-08-03 | 深圳市华星光电半导体显示技术有限公司 | Liquid crystal display panel preparation method and liquid crystal display panel |
| CN113359354A (en) * | 2021-05-20 | 2021-09-07 | 北海惠科光电技术有限公司 | Display panel and display device |
| CN113568200A (en) * | 2021-07-15 | 2021-10-29 | 惠州华星光电显示有限公司 | Dark cluster repairing method and device for curved liquid crystal display panel |
| CN113671740B (en) * | 2021-08-06 | 2023-05-02 | Tcl华星光电技术有限公司 | Flexible display panel and display device |
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| CN109613765A (en) | 2019-04-12 |
| CN109613765B (en) | 2021-09-28 |
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