CN107300809A - Flexible liquid crystal display - Google Patents
Flexible liquid crystal display Download PDFInfo
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- CN107300809A CN107300809A CN201710541529.8A CN201710541529A CN107300809A CN 107300809 A CN107300809 A CN 107300809A CN 201710541529 A CN201710541529 A CN 201710541529A CN 107300809 A CN107300809 A CN 107300809A
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- liquid crystal
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 133
- 239000000758 substrate Substances 0.000 claims abstract description 124
- 230000003287 optical effect Effects 0.000 claims description 59
- 230000005684 electric field Effects 0.000 claims description 15
- 239000010408 film Substances 0.000 description 53
- 230000000007 visual effect Effects 0.000 description 15
- 239000011521 glass Substances 0.000 description 10
- 238000000034 method Methods 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 239000004642 Polyimide Substances 0.000 description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 description 2
- 230000002596 correlated effect Effects 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 210000000713 mesentery Anatomy 0.000 description 2
- 229920001721 polyimide Polymers 0.000 description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 description 2
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 230000000875 corresponding effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- ZZUFCTLCJUWOSV-UHFFFAOYSA-N furosemide Chemical compound C1=C(Cl)C(S(=O)(=O)N)=CC(C(O)=O)=C1NCC1=CC=CO1 ZZUFCTLCJUWOSV-UHFFFAOYSA-N 0.000 description 1
- 229910052740 iodine Inorganic materials 0.000 description 1
- 239000011630 iodine Substances 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 125000000956 methoxy group Chemical group [H]C([H])([H])O* 0.000 description 1
- 229920003055 poly(ester-imide) Polymers 0.000 description 1
- 229920001643 poly(ether ketone) Polymers 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- -1 polyamidoimide Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
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- 239000010409 thin film Substances 0.000 description 1
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Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/13363—Birefringent elements, e.g. for optical compensation
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/133305—Flexible substrates, e.g. plastics, organic film
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Liquid Crystal (AREA)
- Polarising Elements (AREA)
Abstract
The embodiment of the invention relates to a flexible liquid crystal display, which comprises a liquid crystal layer; and a first flexible substrate and a second flexible substrate sandwiching (sandwich) the liquid crystal layer. The first flexible substrate has a phase difference value in a first thickness direction, the second flexible substrate has a phase difference value in a second thickness direction, and the sum of the phase difference value in the first thickness direction and the phase difference value in the second thickness direction is 20nm to 220 nm. The flexible liquid crystal display operates in an in-plane switching (IPS) mode or a Fringe Field Switching (FFS) mode.
Description
Technical field
The embodiment of the present invention relates to a kind of liquid crystal display, and particularly with regard to a kind of bendable liquid crystal display.
Background technology
As portable displayer is widely used, the exploitation for flexible display also more becomes positive.At present may be used
The exploitation for scratching formula display is main based on bendable Organic Light Emitting Diode (OLED) display, however its manufacturing cost compared with
It is high.
On the other hand, liquid crystal display due to cost is relatively low and moisture-proof preferably, therefore bendable liquid crystal display also into
Make great efforts the object of development for Ge Jia manufacturers.It is usually to replace traditional glass with plastic substrate to reach the requirement of " deflection "
Glass substrate.However, can plastic substrate also influence the important key of display effect with the optical property collocation of liquid crystal layer.
Therefore, how to arrange in pairs or groups liquid crystal and plastic substrate optical characteristics to improve overall optical appearance as bendable liquid crystal
Display develops a upper important topic.
The content of the invention
The embodiment of the present invention provides a kind of bendable liquid crystal display, including：Liquid crystal layer；And the above-mentioned liquid crystal layer of sandwiched
First flexible substrate and the second flexible substrate.Above-mentioned first flexible substrate has first thickness direction position phase difference, the
Two flexible substrates have second thickness direction position phase difference, and first thickness direction position phase difference and second thickness direction position phase
The summation of difference is 20nm to 220nm.Above-mentioned bendable liquid crystal display is operate in transverse electric field switching (in-plane
Switching, IPS) pattern or boundary electric field switching (fringe field switching, FFS) pattern.
The embodiment of the present invention also provides a kind of bendable liquid crystal display, including：Liquid crystal layer；The of the above-mentioned liquid crystal layer of sandwiched
One flexible substrate and the second flexible substrate；And first optical compensation films, it is arranged on the first flexible substrate.Above-mentioned
One flexible substrate has first thickness direction position phase difference, and the second flexible substrate has second thickness direction position phase difference,
First optical compensation films have the 3rd thickness direction position phase difference, and first thickness direction position phase difference, second thickness direction position
The summation of phase difference and the 3rd thickness direction position phase difference is 20nm to 220nm.Above-mentioned bendable liquid crystal display is operate in
Transverse electric field switches (in-plane switching, IPS) pattern or boundary electric field switching (fringe field
Switching, FFS) pattern.
The embodiment of the present invention separately provides a kind of bendable liquid crystal display, including：Liquid crystal layer；The of the above-mentioned liquid crystal layer of sandwiched
One flexible substrate and the second flexible substrate；First optical compensation films, are arranged on the first flexible substrate；And second light
Compensation film is learned, is arranged on the second flexible substrate.Above-mentioned first flexible substrate has first thickness direction position phase difference, the
Two flexible substrates have second thickness direction position phase difference, and the first optical compensation films have the 3rd thickness direction position phase difference,
Second optical compensation films have the 4th thickness direction position phase difference, and first thickness direction position phase difference, second thickness direction position
The summation of phase difference, the 3rd thickness direction position phase difference and the 4th thickness direction position phase difference is 20nm to 220nm.It is above-mentioned flexible
Formula liquid crystal display is operate in transverse electric field switching (in-plane switching, IPS) pattern or boundary electric field switching
(fringe field switching, FFS) pattern.
Brief description of the drawings
Embodiments of the invention are described in detail below in conjunction with appended accompanying drawing.It should be noted that according to standing procedure in the industry cycle,
Various features are not drawn to scale and only to illustrate to illustrate.In fact, the chi of element may be zoomed in or out arbitrarily
It is very little, clearly to show the feature of the embodiment of the present invention.
Fig. 1 is shown when the position phase difference (Delta_nd) of liquid crystal layer is 350nm according to some embodiments of the invention, if
It is placed between the thickness direction of the film layer of the liquid crystal layer side position summation of phase difference and the light leak amount of IPS/FFS liquid crystal displays
Relation；
Fig. 2 shows the profile of bendable liquid crystal display 10 according to a first embodiment of the present invention；
Fig. 3 shows the profile of bendable liquid crystal display 20 according to a second embodiment of the present invention；
Fig. 4 shows the profile of bendable liquid crystal display 30 according to a third embodiment of the present invention；
Fig. 5 A show the light leak amount distribution map at each visual angle of the IPS/FFS liquid crystal displays using glass substrate；
Fig. 5 B are embodiments in accordance with the present invention, show the IPS/FFS liquid crystal displays of use pi substrate
The light leak amount distribution map at each visual angle；
Fig. 6 A show the light leak amount distribution map at each visual angle of the IPS/FFS liquid crystal displays using glass substrate；
Fig. 6 B are embodiments in accordance with the present invention, show the IPS/ using pi substrate and optical compensation mould
The light leak amount distribution map at each visual angle of FFS liquid crystal displays.
【Symbol description】
10th, 20,30~bendable liquid crystal display
100~liquid crystal layer
100 '~liquid crystal display
102~the first flexible substrates
104~the second flexible substrates
106~the first Polarizers
108~the second Polarizers
200~the first optical compensation films
300~the second optical compensation films
Embodiment
The many different implementations of following discloses or example carry out the different characteristic of the present invention, describe specific below
Element and its arrangement embodiment to illustrate the present invention.These certain embodiments should not limit this only to illustrate with this
The scope of invention.It is formed at for example, mentioning the first element in the description on the second element, it includes the first element and second
Element is the embodiment directly contacted, and the implementation for having other elements between the first element and the second element in addition is also included in addition
Example, that is, the first element and the second element and non-direct contact.In addition, the label of repetition may be used in different embodiments
Or sign, these are repeated only for simply clearly describing the embodiment of the present invention, do not represent the not be the same as Example that is discussed and/or
There is specific relation between structure.
In addition, may wherein use with space correlation word, such as " in ... lower section ", " lower section ", " relatively low ", " on
Side ", " higher " and similar word, these space correlation words are for the ease of (a little) element or spy in description diagram
The relation between another (a little) element or feature is levied, device of these space correlation words including the use of in or in operation
Different azimuth, and the orientation described in accompanying drawing.Device may be diverted different azimuth (being rotated by 90 ° or other orientation), then
The space correlation adjective wherein used also can be in the same manner according to explanation.
In addition, the embodiment of the present invention is defined as follows on the term of optical property：
(1)nxFor the refractive index on the maximum direction (i.e. slow phase direction of principal axis) of refractive index in the face of film layer, nyFor the face of film layer
Refractive index on the interior direction (i.e. leading phase shaft direction) vertical with slow phase direction of principal axis, nzFor the refractive index in thicknesses of layers direction, d is
The thickness of film layer.
(2) position phase difference R0 is defined as (n in film surfacex-ny)×d.In general, position phase difference is to use ripple in film surface
The light of long 590nm (nanometer) is determined.
(3) thickness direction position phase difference Rth is defined as { [(nx+ny)/2]-nz}×d.In general, thickness direction position
Phase difference is determined using wavelength 590nm light.
In general, transverse electric field switching (In-Plane-Switching, IPS) liquid crystal display panel includes a pair of substrates
And it is arranged at the liquid crystal layer between aforesaid substrate, and the liquid crystal molecules parallel in liquid crystal layer is in substrate arrangement.One of base
Plate is for transistor (TFT) array substrate and comprising multiple pixel electrodes and common voltage electrode, and wherein pixel electrode and common voltage electrode is located at
In copline and cross arrangement.In addition, fringe field switches (Fringe-Field Switching, FFS) liquid crystal display panel
Equally including a pair of substrates and the liquid crystal layer that is arranged between aforesaid substrate, and liquid crystal molecules parallel in liquid crystal layer is in substrate
Arrangement.From unlike IPS, pixel electrode and common voltage electrode in FFS transistor (TFT) array substrate are non-is located in copline.
Although IPS and FFS structures have slightly different, right operator scheme is extremely similar.When giving corresponding signal in pixel electrode,
Pixel electrode and common voltage electrode formation electric field, liquid crystal molecule can pass through electric field driven and causes in horizontal torsion (parallel to substrate)
Some light can pass through liquid crystal planer.Because liquid crystal molecule can be obtained in horizontal torsion, therefore IPS or FFS liquid crystal display panels
Preferably visual angle is (for example：178 degree of visual angle up and down).However, also due to the liquid crystal molecule of IPS/FFS liquid crystal display panels
In horizontally arranged, the penetrance of light is also less good.Preferably show that light tone will increase the luminosity of backlight to have, and then
The problem of causing light leak so that the contrast of IPS/FFS liquid crystal display panels is not good.
Accordingly, the present invention provides a kind of structure of liquid crystal display for IPS/FFS patterns, is especially used in bendable
Liquid crystal display so that it is in addition to the characteristic good with visual angle, the characteristic also contrasted with low drain light height.
Fig. 1 is refer to, according to some embodiments of the invention, its position phase difference (Delta_nd) for showing in liquid crystal layer is
During 350nm, summation and the leakage of IPS/FFS liquid crystal displays of the thickness direction position phase difference of the film layer of liquid crystal layer side are arranged at
Relation between light quantity.By Fig. 1 it can be clearly seen that being arranged at the thickness direction position phase difference of the film layer of liquid crystal layer side
Summation for 10nm to 110nm (preferably 40nm to 80nm) when, FFS/IPS displays can have preferably optical appearance.Change
Yan Zhi, if the summation for being arranged at the thickness direction position phase difference of the film layer of liquid crystal layer side can be controlled in 10nm to 110nm (preferably
For 40nm to 80nm) when, the light leak amount of FFS/IPS displays can be controlled in less than 0.006% and (is preferably less than 0.005%, more
Good is less than 0.004%), therefore contrast of the FFS/IPS displays at each visual angle can be improved.
【First embodiment】
The present embodiment is the position phase difference according to above-mentioned Fig. 1 result collocation flexible substrate and liquid crystal layer, so that flexible
Formula liquid crystal display can have good optical appearance.
Fig. 2 is refer to, it shows the bendable liquid crystal display 10 of the present embodiment, and it includes liquid crystal display
It is flexible that 100 ', first Polarizer 106 and the second Polarizer 108, wherein liquid crystal display 100 ' include liquid crystal layer 100, first
The flexible substrate 104 of formula substrate 102 and second.In the present embodiment, bendable liquid crystal display 10 operate in IPS patterns or
FFS mode.In other words, the liquid crystal molecule in liquid crystal layer 100 is in the first flexible substrate 102 and the second flexible substrate 104
It is horizontally arranged, and pixel electrode and common voltage electrode (not being plotted in accompanying drawing) be located at liquid crystal layer 100 the same side (that is, pixel electricity
Pole and common voltage electrode are co-located on the first flexible substrate 102 or are co-located on the second flexible substrate 104).
In certain embodiments, the position phase difference (Delta_nd) of liquid crystal layer 100 can be 310nm to 370nm, wherein liquid crystal
The refractive indices n of layer 100 can be between about 0.09 and 0.12.
Fig. 2 is continued referring to, the first flexible substrate 102 and the second flexible substrate 104 are sandwiched (sandwich) liquid
Crystal layer 100.In certain embodiments, the first flexible substrate 102 and the second flexible substrate 104 be each with liquid crystal layer 100
Directly contact.
For example, the first flexible substrate 102 can be active matrix substrate, its electro-optic properties provided with control liquid crystal
Switch element (for example：Thin film transistor (TFT)), and the scan line and supply source electrode of signal are supplied to above-mentioned switch element
The signal wire of signal, the second flexible substrate 104 can be colored filter substrate, and it is provided with colored filter.However, above-mentioned coloured silk
Colo(u)r filter also may be disposed at active matrix substrate.
For example, the first flexible substrate 102 and the second flexible substrate 104 can by pi (polyimide,
Abbreviation PI) formed, different from traditional glass substrate, the substrate formed with pi is because of macromolecular structure and process conditions
Deng influence, it has an incorgruous characteristic of optics, thus produces optics position phase difference, therefore when liquid crystal layer is used together, palpus
Consider it with the collocation of the optical property of liquid crystal layer to obtain preferably optical appearance.For example, it is above-mentioned by pi institute
The substrate 102 and 104 of formation can each have appropriate optical anisotropy, such as nx=ny>nz.In addition, the first flexible substrate
102 and second the visible light transmittance rate of flexible substrate 104 can each be more than 90% (such as 90.99% to 99.99%).This
Outside, the above-mentioned substrate 102 and 104 formed by pi has the characteristic of deflection, and can meet bendable liquid crystal display
The demand of the deflection of device 10.For example, can be in the base plate coating polyurethane material such as glass, and remove after film forming conduct
First flexible substrate 102 and the second flexible substrate 104.
First flexible substrate 102 has first thickness direction position phase difference R1, and the second flexible substrate 104 has second
Thickness direction position phase difference R2, the result presented according to Fig. 1, to coordinate the liquid crystal layer that position phase difference is 310nm to 370nm
100, first thickness direction position phase difference and second thickness direction position phase difference summation R1+R2 can be 20nm to 220nm, preferably
It is 80nm to 160nm, and make it that bendable liquid crystal display 10 has relatively low light leak amount and preferably optical appearance is (for example：
High-contrast).In certain embodiments, position phase difference in the film surface of the first flexible substrate 102 and the second flexible substrate 104
Can be each 0nm.In some embodiments, the thickness of at least one of the first flexible substrate 102 and the second flexible substrate 104
Degree can be 1 μm to 25 μm, preferably 5 μm to 20 μm, allow whereby first thickness direction position phase difference R1 and second thickness direction position
At least one control of phase difference R2 is in 10nm to 110nm, preferably 40nm to 80nm.It should be noted that first thickness direction position
Phase difference R1 and second thickness direction position phase difference R2 can be identical or different.Whereby, IPS patterns or FFS mode are operated in
The light leak amount of bendable liquid crystal display 10 can be controlled in less than 0.006% (preferably less than 0.005%, more preferably 0.004%
Below), the contrast at each visual angle is allowed to be lifted.
Fig. 5 A and Fig. 5 B are refer to, it each shows the IPS/FFS liquid crystal displays and this reality using glass substrate
Apply example and use pi substrate (for example：The light leak at each visual angle of both IPS/FFS liquid crystal displays R1+R2=120nm)
Amount, wherein block R represents the larger part of light leak amount (light leak amount is more than 0.006%), and LV represents the maximum light leak of whole region
Amount.By Fig. 5 A and Fig. 5 B it can be clearly seen that the first thickness direction position phase difference R1 and second of the first flexible substrate 102
The second thickness direction position phase difference R2 of flexible substrate 104 summation R1+R2 is in 120nm, compared to the liquid of glass substrate
Crystal display, the light leak amount at each visual angle, which has, significantly to be reduced, and wherein the maximum light leak amount of whole region is reduced from 0.0071%
To 0.0045%.
Fig. 2 is continued referring to, the first Polarizer 106 and the second Polarizer 108 are the first flexible substrate of sandwiched 102,
Two flexible substrates 104 and liquid crystal layer 100.In certain embodiments, the first Polarizer 106 is and the first flexible substrate 102
Directly contact and the second Polarizer 108 is directly contacted and mediate without other film layers with the second flexible substrate 104.First
The Polarizer 108 of Polarizer 106 and second can each have appropriate thickness.First Polarizer 106 and the second Polarizer 108 are respective
It may include the hydrophilic macromolecule film through uniaxial extension after absorption iodine or dichroic dye, for example：Polyvinyl alcohol mesentery, part two
Methoxy methanation polyvinyl alcohol mesentery, the partly-hydrolysed film of vinyl-vinyl acetate copolymer system, combinations of the above or other are appropriate
Material.
Summary, the present embodiment is so that the first flexible substrate 102 and the second flexible substrate 104 have suitably
Thickness direction position phase difference is (for example：The summation of both thickness direction position phase differences is 20nm to 220nm, and preferably 80nm is extremely
160nm), there can be preferably optical appearance when it is used with position phase difference for 310nm to the 370nm collocation of liquid crystal layer 100.
【Second embodiment】
Fig. 3 is refer to, it shows the bendable liquid crystal display 20 of the present embodiment, it is bendable with first embodiment
The difference of liquid crystal display 10 be bendable liquid crystal display 20 the first flexible substrate 102 and the first Polarizer 106 it
Between be more provided with the first optical compensation films 200.In addition, bendable liquid crystal display 20 be suitably collocation optical compensation films 200,
First flexible substrate 102, the position phase difference of the second flexible substrate 104 and liquid crystal layer and can have good optical appearance.
Above-mentioned first optical compensation films 200 can have appropriate optical anisotropy, such as nx=ny<nz, and can be with the first base
(its optical anisotropy can be n for plate 102 and second substrate 104x=ny>nz) be collocated with each other and obtain appropriate thickness direction position phase
The summation of difference, therefore the elasticity of film layer design can be increased.In the present embodiment, the first flexible substrate 102 has the first thickness
Direction position phase difference R1 is spent, the second flexible substrate 104 has second thickness direction position phase difference R2, the first optical compensation films
200 have the 3rd thickness direction position phase difference R3.For example, the 3rd thickness direction position phase difference R3 can be 0 to -500nm.For
Coordinate the liquid crystal layer 100 that position phase difference is 310nm to 370nm, first thickness direction position phase difference R1, second thickness direction position phase
Difference R2 and the 3rd thickness direction position phase difference R3 summation R1+R2+R3 can be 20nm to 220nm, and preferably 80nm is extremely
160nm, and make it that bendable liquid crystal display 20 has relatively low light leak amount and preferably optical appearance is (for example：Height contrast
Degree).
For example, the summation R1+R3 and second of first thickness direction position phase difference and the 3rd thickness direction position phase difference
Thickness direction position phase difference R2 at least one be 10nm to 110nm, preferably 40nm to 80nm.It should be noted that first thickness
The summation R1+R3 of direction position phase difference and the 3rd thickness direction position phase difference can be identical with second thickness direction position phase difference R2
Or it is different.Whereby, the light leak amount for operating in the bendable liquid crystal display 20 of IPS patterns or FFS mode can be controlled in 0.006%
(preferably less than 0.005%, more preferably less than 0.004%), allows the contrast at each visual angle to be lifted below.
The thickness of first optical compensation films 200 can be 0.1 to 50 μm, preferably 1 to 20 μm, allow the 3rd thickness direction whereby
Position phase difference R3 controls are in 0nm to -500nm.For example, the first optical compensation films 200 can be by polyamide, polyimides, poly-
Ester, polyether-ketone, polyamidoimide, polyesterimide, combinations of the above or other appropriate materials are formed.For example,
Using liquid crystal rubbing method or other appropriate method first optical compensation films 200 of formation, formed at some with liquid crystal rubbing method
In the embodiment of first optical compensation films 200, it can be discoid mesomorph form.
In certain embodiments, the first optical compensation films 200 can be with the first flexible substrate 102 and/or the first Polarizer
106 directly contact and it is mediate without other film layers.In addition, though in the present embodiment, the first optical compensation films 200 are single
Film layer, if but the correlated condition of rheme phase difference can be met, in some other embodiments, the first optical compensation films
200 also may include multiple sublayers.
【3rd embodiment】
Fig. 4 is refer to, it shows the bendable liquid crystal display 30 of the present embodiment, it is bendable with second embodiment
The difference of liquid crystal display 20 be bendable liquid crystal display 30 the second flexible substrate 104 and the second Polarizer 108 it
Between have the second optical compensation films 300.Second optical compensation films 300 may include same or similar with the first optical compensation films 200
Property.
Above-mentioned second optical compensation films 300 can have appropriate optical anisotropy, such as nx=ny<nz, and can be with the first base
Plate 102, the optical compensation films 200 of second substrate 104 and first are collocated with each other and obtain appropriate thickness direction position phase difference
Summation, therefore the elasticity of film layer design can be increased.
In the present embodiment, the first flexible substrate 102 has first thickness direction position phase difference R1, the second bendable base
Plate 104 has second thickness direction position phase difference R2, and the first optical compensation films 200 have the 3rd thickness direction position phase difference R3,
Second optical compensation films 300 have the 4th thickness direction position phase difference R4.For example, the 3rd thickness direction position phase difference R3 and
4th thickness direction position phase difference R4 at least one can be 0 to -500nm.To coordinate the liquid that position phase difference is 310nm to 370nm
Crystal layer 100, first thickness direction position phase difference, second thickness direction position phase difference, the 3rd thickness direction position phase difference and the 4th
The summation R1+R2+R3+R4 of thickness direction position phase difference can be 20nm to 220nm, and preferably 80nm causes flexible to 160nm
Formula liquid crystal display 30 has relatively low light leak amount and preferably optical appearance is (for example：High-contrast).
For example, the summation R1+R3 and second of first thickness direction position phase difference and the 3rd thickness direction position phase difference
At least one is 10nm to 110nm to the summation R2+R4 of thickness direction position phase difference and the 4th thickness direction position phase difference, preferably
40nm to 80nm.It should be noted that first thickness direction position phase difference and the 3rd thickness direction position phase difference summation R1+R3 with
The summation R2+R4 of second thickness direction position phase difference and the 4th thickness direction position phase difference can be identical or different.Whereby, operate
Less than 0.006% is can be controlled in the light leak amount of IPS patterns or the bendable liquid crystal display 30 of FFS mode (preferably
Less than 0.005%, more preferably less than 0.004%), allow the contrast at each visual angle to be lifted.
Fig. 6 A and Fig. 6 B are refer to, it each shows the IPS/FFS liquid crystal displays and this reality using glass substrate
Apply example and use pi substrate and optical compensation films (for example：R1+R3=60nm, R2+R4=60nm) IPS/FFS liquid crystals
Show the light leak amount at each visual angle of both devices, wherein block R represents the larger part of light leak amount (light leak amount is more than 0.006%), LV
Represent the maximum light leak amount of whole region.By Fig. 6 A and Fig. 6 B it can be clearly seen that the first thickness of the first flexible substrate 102
Spend direction position phase difference R1, the second thickness direction position phase difference R2 of the second flexible substrate 104, the of optical compensation films 200
The 4th thickness direction position phase difference R4 of three thickness directions position phase difference R3 and optical compensation films 300 summation R1+R2+R3+
R4 is in 120nm, compared to the liquid crystal display of glass substrate, and the light leak amount at each visual angle, which has, significantly to be reduced, wherein entirely
The maximum light leak amount in region is reduced to 0.0057% from 0.0071%.
In certain embodiments, the second optical compensation films 300 can be with the second flexible substrate 104 and/or the second Polarizer
108 directly contact and it is mediate without other film layers.In addition, though in the present embodiment, the second optical compensation films 300 are single
Film layer, if but the correlated condition of rheme phase difference can be met, in some other embodiments, the second optical compensation films
300 also may include multiple sublayers.
In summary, the liquid crystal display of the embodiment of the present invention makes flexible substrate have suitably with optical compensation films
Thickness direction position phase difference, and the light leak of liquid crystal display can be reduced and improve its optical appearance.In addition, with suitable thickness side
To the flexible substrate of position phase difference while the optical appearance of liquid crystal display is improved, the need of its deflection can be also met
Ask.
Although the present invention is disclosed above with several preferred embodiments, so it is not limited to the present invention, any affiliated
Have usually intellectual in technical field, without departing from the spirit and scope of the present invention, arbitrarily change and retouch when that can make,
Therefore protection scope of the present invention is worked as and is defined depending on the scope of which is defined in the appended claims.
Claims (18)
1. a kind of bendable liquid crystal display, it is characterised in that including：
One liquid crystal layer；And
One first flexible substrate and one second flexible substrate, the sandwiched liquid crystal layer；
Wherein first flexible substrate has first thickness direction position phase difference, and second flexible substrate has one second
Thickness direction position phase difference, and the summation of first thickness direction position phase difference and second thickness direction position phase difference is 20nm
To 220nm；
Wherein the bendable liquid crystal display is operate in transverse electric field switch mode or boundary electric field switch mode.
2. bendable liquid crystal display according to claim 1, it is characterised in that first thickness direction position phase difference with
At least one of second thickness direction position phase difference is 10nm to 110nm.
3. bendable liquid crystal display according to claim 1, it is characterised in that first thickness direction position phase difference and
The summation of second thickness direction position phase difference is 80nm to 160nm.
4. bendable liquid crystal display according to claim 3, it is characterised in that first thickness direction position phase difference with
At least one of second thickness direction position phase difference is 40nm to 80nm.
5. a kind of bendable liquid crystal display, it is characterised in that including：
One liquid crystal layer；
One first flexible substrate and one second flexible substrate, the sandwiched liquid crystal layer；And
One first optical compensation films, are arranged on first flexible substrate；
Wherein first flexible substrate has first thickness direction position phase difference, and second flexible substrate has one second
Thickness direction position phase difference, first optical compensation films have one the 3rd thickness direction position phase difference, and the first thickness direction
The summation of position phase difference, second thickness direction position phase difference and the 3rd thickness direction position phase difference is 20nm to 220nm；
Wherein the bendable liquid crystal display is operate in transverse electric field switch mode or boundary electric field switch mode.
6. bendable liquid crystal display according to claim 5, it is characterised in that first thickness direction position phase difference and
At least one of summation and second thickness direction position phase difference of 3rd thickness direction position phase difference are 10nm to 110nm.
7. bendable liquid crystal display according to claim 5, it is characterised in that first thickness direction position phase difference,
The summation of second thickness direction position phase difference and the 3rd thickness direction position phase difference is 80nm to 160nm.
8. bendable liquid crystal display according to claim 7, it is characterised in that first thickness direction position phase difference and
At least one of summation and second thickness direction position phase difference of 3rd thickness direction position phase difference are 40nm to 80nm.
9. bendable liquid crystal display according to claim 5, it is characterised in that the 3rd thickness direction position phase difference is
0nm to -500nm.
10. a kind of bendable liquid crystal display, it is characterised in that including：
One liquid crystal layer；
One first flexible substrate and one second flexible substrate, the sandwiched liquid crystal layer；
One first optical compensation films, are arranged on first flexible substrate；And
One second optical compensation films, are arranged on second flexible substrate；
Wherein first flexible substrate has first thickness direction position phase difference, and second flexible substrate has one second
Thickness direction position phase difference, first optical compensation films have one the 3rd thickness direction position phase difference, second optical compensation films
With one the 4th thickness direction position phase difference, and the first thickness direction position phase difference, the second thickness direction position phase difference, should
The summation of 3rd thickness direction position phase difference and the 4th thickness direction position phase difference is 20nm to 220nm；
Wherein the bendable liquid crystal display is operate in transverse electric field switch mode or boundary electric field switch mode.
11. bendable liquid crystal display according to claim 10, it is characterised in that first thickness direction position phase difference
And the 3rd thickness direction position phase difference summation and the second thickness direction position phase difference and the 4th thickness direction differ
At least one of summation of value is 10nm to 110nm.
12. bendable liquid crystal display according to claim 10, it is characterised in that first thickness direction position difference
Value, the second thickness direction position phase difference, the 3rd thickness direction position phase difference and the 4th thickness direction position phase difference it is total
With for 80nm to 160nm.
13. bendable liquid crystal display according to claim 12, it is characterised in that first thickness direction position phase difference
And the 3rd summation and the second thickness direction position phase difference of thickness direction position phase difference be and the 4th thickness direction phase
At least one of summation of difference is 40nm to 80nm.
14. bendable liquid crystal display according to claim 10, it is characterised in that the 3rd thickness direction position phase difference
And the 4th thickness direction position at least one of phase difference be 0nm to -500nm.
15. the bendable liquid crystal display according to claim 1,5 or 10, it is characterised in that first flexible substrate
And second flexible substrate is included in pi, and/or first flexible substrate and second flexible substrate at least
The thickness of one is between 1 μm to 25 μm.
16. the bendable liquid crystal display according to claim 1,5 or 10, it is characterised in that also including one first polarisation
Plate and one second Polarizer, are respectively arranged on first flexible substrate and second flexible substrate.
17. the bendable liquid crystal display according to claim 1,5 or 10, it is characterised in that first flexible substrate
There is position phase difference in one second film surface with position phase difference in one first film surface and second flexible substrate, wherein this first
Position phase difference is respectively 0nm in position phase difference and second film surface in film surface.
18. the bendable liquid crystal display according to claim 1,5 or 10, it is characterised in that first flexible substrate
And the optical anisotropy of second flexible substrate is respectively nx=ny>nz, wherein nxFor on the maximum direction of refractive index in face
Refractive index, nyFor the refractive index on the direction vertical with the direction that refractive index in face is maximum, nzFor the refraction in thicknesses of layers direction
Rate.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW105143836A TWI592721B (en) | 2016-12-29 | 2016-12-29 | Flexible liquid crystal display |
| TW105143836 | 2016-12-29 |
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| Publication Number | Publication Date |
|---|---|
| CN107300809A true CN107300809A (en) | 2017-10-27 |
| CN107300809B CN107300809B (en) | 2020-09-18 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710541529.8A Active CN107300809B (en) | 2016-12-29 | 2017-07-05 | Flexible liquid crystal display |
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| Country | Link |
|---|---|
| CN (1) | CN107300809B (en) |
| TW (1) | TWI592721B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112394574A (en) * | 2019-08-19 | 2021-02-23 | 群创光电股份有限公司 | Electronic device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1658035A (en) * | 2004-02-18 | 2005-08-24 | 力特光电科技股份有限公司 | Wide-angle liquid crystal display panel |
| JP2006195205A (en) * | 2005-01-14 | 2006-07-27 | Fuji Photo Film Co Ltd | Liquid crystal display device and polarizing plate |
| JP2007016137A (en) * | 2005-07-08 | 2007-01-25 | Konica Minolta Opto Inc | Optical film polarizing plate liquid crystal display device |
| CN105629582A (en) * | 2016-03-30 | 2016-06-01 | 京东方科技集团股份有限公司 | Display substrate, liquid crystal display panel and display device |
-
2016
- 2016-12-29 TW TW105143836A patent/TWI592721B/en active
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2017
- 2017-07-05 CN CN201710541529.8A patent/CN107300809B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1658035A (en) * | 2004-02-18 | 2005-08-24 | 力特光电科技股份有限公司 | Wide-angle liquid crystal display panel |
| JP2006195205A (en) * | 2005-01-14 | 2006-07-27 | Fuji Photo Film Co Ltd | Liquid crystal display device and polarizing plate |
| JP2007016137A (en) * | 2005-07-08 | 2007-01-25 | Konica Minolta Opto Inc | Optical film polarizing plate liquid crystal display device |
| CN105629582A (en) * | 2016-03-30 | 2016-06-01 | 京东方科技集团股份有限公司 | Display substrate, liquid crystal display panel and display device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112394574A (en) * | 2019-08-19 | 2021-02-23 | 群创光电股份有限公司 | Electronic device |
Also Published As
| Publication number | Publication date |
|---|---|
| TW201823818A (en) | 2018-07-01 |
| CN107300809B (en) | 2020-09-18 |
| TWI592721B (en) | 2017-07-21 |
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