CN110133904A - Multi-steady state liquid crystal display part, preparation method and driving method - Google Patents
Multi-steady state liquid crystal display part, preparation method and driving method Download PDFInfo
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- CN110133904A CN110133904A CN201910458897.5A CN201910458897A CN110133904A CN 110133904 A CN110133904 A CN 110133904A CN 201910458897 A CN201910458897 A CN 201910458897A CN 110133904 A CN110133904 A CN 110133904A
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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
- G02F1/1334—Constructional arrangements; Manufacturing methods based on polymer dispersed liquid crystals, e.g. microencapsulated liquid crystals
-
- 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
- G02F1/133509—Filters, e.g. light shielding masks
- G02F1/133514—Colour filters
-
- 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
- G02F1/1343—Electrodes
- G02F1/134309—Electrodes characterised by their geometrical arrangement
-
- 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
- G02F1/137—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 characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering
- G02F1/13718—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 characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering based on a change of the texture state of a cholesteric liquid crystal
-
- 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
- G02F1/1343—Electrodes
- G02F1/134309—Electrodes characterised by their geometrical arrangement
- G02F1/134318—Electrodes characterised by their geometrical arrangement having a patterned common electrode
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mathematical Physics (AREA)
- Dispersion Chemistry (AREA)
- Geometry (AREA)
- Liquid Crystal (AREA)
Abstract
The invention belongs to field of display technology, a kind of multi-steady state liquid crystal display part, preparation method and driving method are provided, comprising: first substrate, inside have first electrode layer, and first electrode layer includes several first electrode patterns;The second substrate, inside have the second electrode lay, and the second electrode lay includes several second electrode patterns;The liquid crystal layer being sealed between first substrate and the second substrate;Wherein, the face part of several first electrode patterns and several second electrode patterns constitutes several pixel units, each pixel unit includes multiple primary colors pixel, corresponding LCD segment has different screw pitch to different primary color pixels in the liquid crystal layer, and the LCD segment of each primary color pixels is enabled to reflect the light of corresponding wavelength.The present invention can realize full-color display for each pixel unit, under the premise of keeping the low-power consumption of multi-steady state liquid crystal display part, the color gamut of multi-steady state liquid crystal display part be extended, contrast and brightness are also improved.
Description
Technical field
The invention belongs to display technology field more particularly to a kind of multi-steady state liquid crystal display parts, preparation method and drive
Dynamic method.
Background technique
Liquid crystal display is at present throughout each life, industrial circle, wherein real-time driving in need and cooperating backlight
The liquid crystal display shown, the multi-steady state liquid crystal display that also reliable environment light is shown.
The advantages of multi-steady state liquid crystal display, is to show that content shines independent of device itself, but relies on environment light
It is shown, basic displaying principle is that liquid crystal corresponding to need pixel to be shown is that (this state can disappear a state
Light), being not required to liquid crystal corresponding to pixel to be shown is another state (this attitudinal reflexes light), both states are all steady
Stationary state, that is, after not needing power down, state can continue to be kept for the time more than some months.The power consumption of this device is mainly used
In the refresh activity for changing device display state, just do not consume energy after device has refreshed, so the power consumption of this display technology
It is especially low.
But the color that this multi-steady state liquid crystal display part can be shown is relatively simple, generally there was only monochrome in each stable state
It has been shown that, such as it is only able to display black/yellow, one of stable state is display black, another stable state is display yellow, is not accomplished
Show black and yellow simultaneously, or be only able to display blue/white etc., one of stable state be displayed in blue, another stable state is
It is displayed in white, does not also accomplish to be displayed in blue simultaneously and white, so display effect is restricted.
Summary of the invention
Problem to be solved of the embodiment of the present invention is how to realize that coloury multistable state liquid srystal is shown, while can show
Show multiple color, promotes display effect.
In order to solve the above technical problems, in a first aspect, the embodiment of the invention provides a kind of multi-steady state liquid crystal display part,
Include:
First substrate, inside have first electrode layer, and the first electrode layer includes several first electrode patterns;
The second substrate, inside have the second electrode lay, and the second electrode lay includes several second electrode patterns;
The liquid crystal layer being sealed between the first substrate and the second substrate;
Wherein, the face part of several first electrode patterns and several second electrode patterns constitutes several pixels
Unit, each pixel unit include multiple primary colors pixel;
Different primary color pixels LCD segment corresponding in the liquid crystal layer has different screw pitch, so that each
The LCD segment of primary color pixels can reflect the light of corresponding wavelength.
Second aspect, the embodiment of the invention also provides a kind of preparation methods of multi-steady state liquid crystal display part, including under
State step:
Make a liquid crystal sylphon;The liquid crystal sylphon includes that inside has the first substrate of first electrode layer, inside has
The second substrate of the second electrode lay, the first electrode layer include several first electrode patterns, and the second electrode lay includes
There are several second electrode patterns;If the face part of several first electrode patterns and several second electrode patterns is constituted
Dry pixel unit, each pixel unit include multiple primary colors pixel;
Liquid crystal containing the polymer that polymerization reaction can occurs under action of ultraviolet light is injected into the liquid crystal sylphon simultaneously
Sealing, obtains liquid crystal cell;
For each primary color pixels, cover the liquid crystal cell using mask plate corresponding with the primary color pixels, then with
Illumination parameter corresponding with the primary color pixels carries out ultraviolet light, until LCD segment corresponding to all primary color pixels is equal
Illuminated mistake, so that forming different primary color pixels LCD segment corresponding in the liquid crystal layer has different screw pitch.
The third aspect, the embodiment of the invention also provides a kind of driving methods of multi-steady state liquid crystal display part, including under
State step:
Preparation stage: all pixels in the preselected area of multi-steady state liquid crystal display part described in the first high voltage drive are utilized
All primary color pixels in unit make all liquid crystal molecules that complete homeotropic state be presented;
Choice phase: target primary color pixels are driven using first choice voltage, so that liquid corresponding to target primary color pixels
Brilliant part remains homeotropic state;Non-targeted primary color pixels are driven using the second selection voltage, so that non-targeted primary colours picture
LCD segment corresponding to element is from homeotropic state to flat state relaxation;
Evolving stage: target primary color pixels and non-targeted primary color pixels are driven simultaneously using voltage is developed, so that target base
LCD segment corresponding to color pixel continues to remain homeotropic state, so that liquid crystal portion corresponding to non-targeted primary color pixels
Divide to flat state relaxation and is changed into Focal conic state;
It removes evolving stage: persistently driving target primary color pixels and non-targeted primary color pixels preset time period using differentiation voltage
Afterwards, the differentiation voltage is removed, so that target primary color pixels are first to the flat state relaxation of screw pitch variation, then again to more stable
Flat state relaxation so that non-targeted primary color pixels remain Focal conic state;
Wherein, the first high voltage > differentiation voltage > first choice voltage > second selection voltage.
The embodiment of the present invention is by being arranged multiple primary colors pixel, and the liquid of each primary color pixels for each pixel unit
Brilliant part can reflect the light of corresponding wavelength, therefore can realize full-color display for each pixel unit, keep multistable
Under the premise of state liquid crystal display device low-power consumption, the color gamut of multi-steady state liquid crystal display part is extended, to make
The color for obtaining multi-steady state liquid crystal display part becomes abundant, and contrast and brightness are also improved, comprehensive to improve display
Effect.
Detailed description of the invention
Fig. 1 is the sectional view for the multi-steady state liquid crystal display part that first embodiment of the invention provides;
Fig. 2 is the design drawing for the first electrode pattern that first embodiment of the invention provides;
Fig. 3 is the design drawing for the second electrode pattern that first embodiment of the invention provides;
Fig. 4 is the schematic diagram for the pixel unit that first embodiment of the invention provides;
Fig. 5 is the multiple primary colors pixel design drawing for the pixel unit that first embodiment of the invention provides;
Fig. 6 is a kind of schematic diagram of the screw pitch for primary color pixels that first embodiment of the invention provides;
Fig. 7 is the schematic diagram of the screw pitch for another primary color pixels that first embodiment of the invention provides;
Fig. 8 is the flow chart of the preparation method for the multi-steady state liquid crystal display part that second embodiment of the invention provides;
Fig. 9 is the outline drawing for the liquid crystal sylphon that second embodiment of the invention provides;
Figure 10 is the schematic diagram for the formation red pixel screw pitch that second embodiment of the invention provides;
Figure 11 is the schematic diagram for the formation green pixel screw pitch that second embodiment of the invention provides;
Figure 12 is the schematic diagram for the formation blue pixel screw pitch that second embodiment of the invention provides;
Figure 13 A is the planar texture figure for the cholesteric liquid crystal that third embodiment of the invention provides;
Figure 13 B is the Focal conic state texture pattern for the cholesteric liquid crystal that third embodiment of the invention provides;
Figure 13 C is the homeotropic state schematic diagram for the cholesteric liquid crystal that third embodiment of the invention provides;
Figure 14 is the flow chart for the driving method that third embodiment of the invention provides;
Figure 15 is the drive waveforms figure that third embodiment of the invention provides;
Figure 16 is the detail flowchart for the driving method that third embodiment of the invention provides.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
First embodiment of the invention provides a kind of multi-steady state liquid crystal display part, and Fig. 1 is the multistable display device
Sectional view, including first substrate 101, the second substrate 107 and the liquid being sealed between first substrate 101 and the second substrate 107
Crystal layer 104 can specifically use epoxy glue seal.Have first electrode layer 102, the second substrate 107 in the inside of first substrate 101
Inside have the second electrode lay 106, first alignment layer can also be set between liquid crystal layer 104 and first electrode layer 102
103, second orientation layer 105, first alignment layer 103 and second orientation layer are set between liquid crystal layer 104 and the second electrode lay 106
Friction has groove on 105, to realize the anchoring to liquid crystal molecule.
First substrate 101 and the second substrate 107 can be flexible material, can also use rigid material, such as glass, the
One electrode layer 102 and the second electrode lay 106 are conductive layer, for example, when first substrate 101 is glass, first electrode layer 102 can be with
For ITO (tin indium oxide) layer being attached on glass.Further, some light can also be set in the outside of first substrate 101
Functional layer, such as anti-reflection layer, anti-dazzle photosphere are learned, anti-scratch protective layer can be set, also to protect to first substrate 101
Shield.The multi-steady state liquid crystal display part can also include reflecting layer 108, and reflecting layer 108 can be set in the outer of the second substrate 107
Side, can also be between liquid crystal layer 104 and the second electrode lay 106.
Furthermore it is also possible to which silicon dioxide layer is arranged between first electrode layer 102 and first alignment layer 103, both can be used as
It for improving the functional material of optical effect, and can be used as improving the functional material of device electrology characteristic, prevent first
Short circuit between electrode layer 102 and the second electrode lay 106.
Furthermore it is also possible to which spray sets some spacer particles (Spacer) between first alignment layer 103 and second orientation layer 105
Equal materials, play a supporting role, keep the thickness of entire liquid crystal layer 104 more uniform.
First electrode layer 102 is equipped with several first electrode patterns, and the second electrode lay 106 is equipped with several second electrode figures
Case, for example, Fig. 2 is the shape for being illustrated first electrode pattern with longitudinal strip electrode pattern PV, each strip electrode
Pattern P V in the horizontal direction on be sequentially arranged, Fig. 3 is to be illustrated second electrode pattern with lateral strip electrode pattern PL
Shape, each strip electrode pattern PL along the vertical direction on be sequentially arranged, as shown in figure 4, electrode pattern PV and electrode pattern
The face part of PL constitutes several pixel unit P, and the switch state by controlling each pixel unit P can be realized image and show.
It should be appreciated that first electrode pattern can also be using lateral strip electrode pattern PL shown in Fig. 3, the second electricity
Pole figure case can also use longitudinal strip electrode pattern PV shown in Fig. 2, although also, Fig. 2 and Fig. 3 by taking strip as an example
It shows electrode pattern, can also be other various shapes according to specific requirements flexible design when actual implementation.
As shown in Fig. 2, including multiple sub-electrode pattern R, G, B in electrode pattern PV, respectively as being used to form R (red) G
The face part of the pattern of (green) B (indigo plant) three primary colours pixel, sub-electrode pattern R and electrode pattern PL constitute red pixel PR, son
The face part of electrode pattern G and electrode pattern PL constitutes green pixel PG, the facing portion of sub-electrode pattern B and electrode pattern PL
Point constitute blue pixel PB, that is, as shown in figure 5, each pixel unit P includes multiple primary colors pixel again, such as red pixel PR, green
Color pixel PG, blue pixel PB etc..It should be noted that Fig. 2, Fig. 4, Fig. 5 are only to be illustrated pixel with red-green-blue
The type of primary color pixels included by unit P, primary color pixels can also be other types, such as two primary colours or four when specific implementation
Primary colours etc..
Contain polymer network structure in liquid crystal layer 104, due to polymer network structure to liquid crystal molecule have anchoring and
The effect of isolation, every kind of primary color pixels all correspond to certain screw pitch, so as to control liquid crystal corresponding to different base colors pixel
Part can reflect the light of different wave length.As shown in fig. 6, having red pixel PR, green pixel PG, blue in first electrode layer 102
These three primary color pixels of pixel PB, the screw pitch of the corresponding LCD segment of red pixel PR are S1, the corresponding liquid crystal of green pixel PG
Partial screw pitch is S2, and the screw pitch of the corresponding LCD segment of blue pixel PG is S3, wherein red pixel PR can reflect feux rouges,
Green pixel PG can reflect green light, blue pixel PG can reflect blue light.
Again since each pixel unit P includes multiple primary color pixels, can by the colour mixture principle of colorimetry come
Different color displays are realized, for example, closing green pixel PG and blue pixel PB, then the pixel when opening red pixel PR
Unit P can be shown in red, can similarly show turquoise two kinds of colors respectively;When opening simultaneously red pixel PR and green pixel
PG, blue pixel PB is closed, then pixel unit P can be shown as yellow, similarly, when opening simultaneously green pixel PG and blue picture
Plain PB, red pixel PR is closed, then pixel unit P can be shown as cyan, when opening simultaneously red pixel PR and blue pixel
PB, green pixel PG is closed, then pixel unit P can be shown as carmetta;When opening simultaneously red pixel PR, green pixel PG
When with blue pixel PB, it can be shown as white, constantly may be used when simultaneously closing off red pixel PR, green pixel PG and blue pixel PB
It is shown as black.As it can be seen that red, green, blue, Huang, blueness, fuchsin, white, black totally eight kinds of colors may be implemented in pixel unit shown in fig. 6
It has been shown that, power saving than traditional LCD/OLED display, and meanwhile it is abundanter than traditional bistable display color.
Further, electrode corresponding to each primary color pixels can also be finely divided again, to improve more advanced colour
It has been shown that, as shown in fig. 7, each primary color pixels in first electrode layer 102 are corresponding with multiple electrodes, such as red pixel PR
Tetra- electrodes of PR1, PR2, PR3, PR4 are corresponding with, green pixel PG is corresponding with tetra- electrodes of PG1, PG2, PG3, PG4, blue picture
Plain PG is corresponding with tetra- electrodes of PB1, PB2, PB3, PB4, controls the achievable control to affiliated primary color pixels of each electrode,
Some or all of such as corresponding red pixel PR, can choose in driving tetra- electrodes of PR1, PR2, PR3, PR4, green pixel
PG, blue pixel PB are same.After electrode corresponding to each primary color pixels to be carried out to division as shown in Figure 7, Mei Geji
Color pixel can have 4 grayscale, therefore 4*4*4=64 grades of color displays may be implemented altogether in RGB three primary colours.If by each primary colours
Electrode corresponding to pixel is further divided into 8 grayscale, therefore 8*8*8=512 grades of colors may be implemented altogether in RGB three primary colours
Colour display screen shows, and it is possible to select which electrode for driving each primary color pixels to realize different display effects, such as works as needs
When two electrodes of selection driving red pixel PR, it can be electrode PR1 and PR2, be also possible to PR1 and PR4, what the former showed
Pixel granular sensation is lower, and the pixel granular sensation that the latter shows is heavier.
As described above, contain polymer network structure in liquid crystal layer 104, which can be in liquid crystal
It mixes suitable polymer and cooperates with different ultraviolet light technique, form corresponding polymer on various primary color pixels
Network, it is different so as to control the reflected light wavelength of liquid crystal since polymer network has anchoring effect to liquid crystal molecule
Wavelength corresponds to different primary color pixels.Specifically, include liquid crystal in liquid crystal layer 104 and can occur under action of ultraviolet light poly-
The polymer of reaction is closed, wherein liquid crystal mixes with polymer, and the mass ratio of liquid crystal and polymer is (100-70): (0-30);Institute
State the photoinitiator that polymer includes the oligomer of 93 mass parts, the diluent of 5 mass parts and 2 mass parts.
For liquid crystal, according to liquid crystal physics principle, the arrangement of liquid crystal molecule is by boundary condition, liquid crystalline phase and condition of external field
It influences, the arranged distribution of liquid crystal molecule is an important factor for determining liquid crystal display form again, and the liquid crystal that the present embodiment uses can
To be nematic liquid crystal, cholesteric liquid crystal, smectic liquid crystal, mainly energy liquid crystal itself can be influenced liquid crystal molecule by polymer network
It can be orientated with polymer network, preferably cholesteric liquid crystal, the chiral agent in polymer network and cholesteric liquid crystal
Under collective effect, so that every kind of primary color pixels all correspond to certain screw pitch.Hereafter illustrate liquid crystal by taking cholesteric liquid crystal as an example
Selection process is generally obtained by the way that chiral agent is added in nematic liquid crystal.
Firstly, the selection of nematic liquid crystal: the present embodiment is advisable with the liquid crystal of high Δ n, high Δ ε, low melting point, low viscosity,
Since the electro-optical characteristic of liquid crystal monomer is difficult to meet whole requirements of display liquid crystal, the liquid crystal of actual use is all same
It is mixed in the liquid-crystal compounds of serial or close series, makes each electro-optical parameters close to proportion target using Adding law.This
Embodiment select liquid crystal based on more aromatic ring class liquid crystal, tolane liquid crystal, polyacetylene liquid crystal etc., with 5CB, 7CB,
The mixing such as PTP-5O2, such as aromatic ring class liquid crystal more than 22.14 parts is taken, 17.93 parts of tolane liquid crystals, 40.55 parts of polyacetylene liquid
Crystalline substance, 3.00 parts of 5CB, 9.31 parts of 7CB, 7.07 parts of PTP-5O2 are sufficiently mixed for use, and mixed liquid crystal is referred to as mixed to list liquid crystal
Close object 1.The molecular formula described above for stating liquid crystal is as follows:
Secondly, the selection of chiral agent: chiral agent used in the present embodiment, it can preferred temperature-resistant chiral agent
For reducing the influence of device temperature drift, the display effect of optimised devices at different temperatures, or can be special using temperature simultaneously
Property opposite two kinds of chiral agents, HTP (distortional ability) value of one of chiral agent increases with temperature and is increased, another chiral
The HTP value of agent increases with temperature and is reduced, and is used in mixed way the influence that can eliminate chiral agent to temperature.It is selected in the present embodiment
Chiral agent is R1011 and CB15, and R1011 chiral agent optical direction is dextrorotation, and HTP value is that 28.2 μm -1, HTP rises with temperature
And it increases;CB15 optical direction be it is left-handed, HTP value be 7.9 μm -1, HTP with temperature rise and reduce.
It is reflected according to Bragg, the central wavelength lambda 0=n*p of device reflection, wherein n is the mean refraction of liquid crystal compound
Rate, p are the screw pitch of liquid crystal compound.The relationship of liquid crystal compound screw pitch p and chiral agent are as follows:
P=1/ (HTP*Xc), Xc are the molar concentration of chiral agent
The screw pitch of cholesteric liquid crystal can be controlled in long wavelength's stage in configuration phase by adjusting the deal of chiral agent
300~850nm, such as can be 700nm.
Finally, the mixing of nematic liquid crystal and chiral agent:In the present embodiment, 5 deal R1011 are taken, 13 deal CB15 is taken, takes
82 deals to list liquid crystal compound 1, be sufficiently mixed uniformly stand-by, obtain cholesteric liquid crystal mixture.
For polymer, oligomer in the present embodiment optical effect final to device is had a major impact, wherein oligomeric
Object can quickly form the main body of polymer network under ultraviolet light, which has stronger anchoring to act on liquid crystal molecule, main
The formation speed of body, concentration in liquid crystal compound etc. can all influence the size of liquid crystal screw pitch, to influence the reflection of pixel
Wavelength and color effects.
Preferred oligomer should have liquid crystal liquid crystal property, can have good intermiscibility, such as double methacrylate class with liquid crystal
Monomer or bis-epoxy alkanes monomer, the present embodiment use 2- methyl -2- acrylic acid -1,2- glycol ester, methacrylic acid -2- hydroxyl
Base propyl ester, methylhexyl methanol, photoinitiator use 1- hydroxycyclohexyl phenyl ketone, and molecular formula is as follows:
For example, oligomer may include 2- methyl -2- acrylic acid -1, the 2- glycol ester and 28 mass parts of 65 mass parts
Methacrylic acid -2- hydroxy propyl ester;The diluent is methylhexyl methanol;The photoinitiator is 1- hydroxycyclohexylphenyl
Ketone.
First embodiment of the invention be can be seen that by the way that multiple primary colors pixel is arranged in each pixel unit, and each
The LCD segment of kind primary color pixels can reflect the light of corresponding wavelength, therefore each pixel unit can be realized full-color aobvious
Show, under the premise of keeping the low-power consumption of multi-steady state liquid crystal display part, the color gamut of multi-steady state liquid crystal display part is carried out
Extension, so that the color of multi-steady state liquid crystal display part becomes abundant, contrast and brightness are also improved, Quan Fang
Position improves display effect.
Second embodiment of the invention additionally provides a kind of preparation method of multi-steady state liquid crystal display part, as shown in figure 8, packet
Include following step:
Step S801 makes a liquid crystal sylphon.
The liquid crystal sylphon has the design of structure described in first embodiment, it may for example comprise has first electrode layer in inside
First substrate, inside have the second electrode lay the second substrate, the first electrode layer includes several first electrode patterns,
The second electrode lay includes several second electrode patterns;Several first electrode patterns and several second electrode figures
The face part of case constitutes several pixel units, and each pixel unit includes multiple primary colors pixel.
Further, each primary color pixels is corresponding in the first electrode pattern or the second electrode pattern
Multiple electrodes, by controlling the achievable control to affiliated primary color pixels of each electrode.
The shape of the liquid crystal sylphon as shown in figure 9, the liquid crystal sylphon generally can there are a liquid feeding mouths, to facilitate subsequent filling
Liquid.
Step S802, liquid filling.Liquid crystal containing the polymer that polymerization reaction can occurs under action of ultraviolet light is injected into
The liquid crystal sylphon simultaneously seals, and obtains liquid crystal cell.
As in the first embodiment, liquid crystal layer includes liquid crystal and can occur polymerization reaction under action of ultraviolet light
Polymer, the liquid crystal mix with the polymer;The mass ratio of the liquid crystal and the polymer is (100-70): (0-
30);The polymer includes the photoinitiator of the oligomer of 93 mass parts, the diluent of 5 mass parts and 2 mass parts.Liquid filling mistake
Journey is as follows:
Take 65 parts of 2- methyl -2- acrylic acid -1,2- glycol esters, 28 parts of methacrylic acid -2- hydroxy propyl esters, 5 parts of methyl
Hexyl methanol, 2 parts of 1- hydroxycyclohexyl phenyl ketones are sufficiently mixed uniformly for use, and mixed liquor is referred to as polymeric blends.
By 92 parts of cholesteric liquid crystal mixtures (such as cholesteric liquid crystal mixture in first embodiment) and 8 parts of polymer
Mixture is sufficiently mixed uniformly for use, and mixed liquor is referred to as cholesteric liquid crystal polymeric blends, and mixture is passed through liquid feeding mouth
It is circulated into liquid crystal sylphon, then again seals liquid feeding mouth.
In the present embodiment, the illumination of ultraviolet light is important process control condition, understands the final of decisive influence device
Production and performance, therefore need to carry out under yellow light environment in the polymer formulators stage.
Step S803 forms the screw pitch of each primary color pixels.For each primary color pixels, using corresponding with the primary color pixels
Mask plate cover the liquid crystal cell, ultraviolet light is then carried out with illumination parameter corresponding with the primary color pixels, until institute
The illuminated mistake of LCD segment corresponding to some primary color pixels, to form different primary color pixels institute in the liquid crystal layer
Corresponding LCD segment has different screw pitch.
Cardinal principle is to carry out exposure mask with different photolithography plates, and carry out curing reaction by ultraviolet lighting.Pass through difference
Illumination condition (different wave length, different light intensity, differential responses time), the degree of polymer reaction will form difference.Such as:
The formation of red pixel screw pitch: the ultraviolet light progress illumination of selection 340nm wavelength, intensity of illumination 3mW/cm2, such as
Shown in Figure 10, it is masked and is irradiated 5 minutes using red pixel mask version, cholesteric liquid crystal polymeric blends are ultraviolet at this time
It is reacted under light, gradually mutually separation forms polymer network to polymer, becomes one by the polymer network that backbone constituents are formed
Boundary condition of the upper and lower level of each and every one liquid crystal farmland, the liquid crystal farmland and liquid crystal cell as liquid crystal molecule can have liquid crystal molecule strong
The spiral micro-structure that screw pitch is 680nm is collectively formed in conjunction with chiral agent in anchoring effect.
The formation of green pixel screw pitch: as shown in figure 11, after the screw pitch of red pixel is formed, changing green pixel mask, and
Using the ultraviolet light of 340nm wavelength, intensity of illumination 5mW/cm2 irradiates 10 minutes.Due to the enhancing of intensity of illumination, polymer
Reaction can be more abundant than in red pixel, so that the component ratio of chiral agent content in the polymer be caused to improve.According to liquid crystal
Screw pitch and the proportionate relationship of chiral agent in the polymer: p=1/ (HTP*Xc), it is known that liquid crystal in green pixel after this polymer reaction
Screw pitch is 550nm.
The formation of blue pixel screw pitch: as shown in figure 12, after the screw pitch of green pixel is formed, changing blue pixel mask version,
And using the ultraviolet light of 340nm wavelength, intensity of illumination 7mW/cm2 irradiates 15 minutes.Continue to enhance due to intensity of illumination,
Polymer reaction can be more abundant than in red pixel, green pixel, so that the component ratio of chiral agent content in the polymer be caused to mention
It is high.According to liquid crystal screw pitch and the proportionate relationship of chiral agent in the polymer: p=1/ (HTP*Xc), it is known that after this polymer reaction
Liquid crystal screw pitch is 420nm in blue pixel.
Third embodiment of the invention provides a kind of driving method of multi-steady state liquid crystal display part, is suitable for first and implements
Multi-steady state liquid crystal display part provided by example, or the multistable state liquid srystal obtained by preparation method provided by second embodiment
Device.
Cholesteric liquid crystal is generally there are two kinds of texture, planar texture respectively as shown in FIG. 13A and as shown in Figure 13 B
Focal conic state texture.In plane state texture, cholesteric liquid crystal has the characteristic of Bragg reflection, can reflect, spiral shell corresponding to its screw pitch
Revolve the light of the consistent wavelength in direction, such as the screw pitch of cholesteric liquid crystal is 550nm, the hand of spiral be it is left-handed, then 380~
Under 780nm natural light, the left circularly polarized light near 550nm wave band can be reflected back by cholesteric liquid crystal, remaining wave band
Light and 550nm wave band near right-circularly polarized light can by liquid crystal layer, at this time liquid crystal layer side watch, liquid crystal meeting
The color of the corresponding light of the wave band is presented.In Focal conic state texture, liquid crystal does not have reflection effect for the light of all wave bands, institute
Having the light of wave band can be transmitted over.If cholesteric liquid crystal device side is increased a reflecting layer, by controlling cholesteric
The different TEXTURE STATEs of phase liquid crystal switch, and the empty energy of different control displays may be implemented.
No matter cholesteric liquid crystal is meeting some requirements lower both states all in planar texture or Focal conic state texture
It is that null field is stablized, by applying different drive conditions, can control cholesteric liquid crystal planar texture shown in Figure 13 A, figure
Change between homeotropic state shown in Focal conic state texture, Figure 13 C shown in 13B.
Please with reference to Figure 14 and Figure 15, driving method provided in this embodiment includes the following steps:
The preparation stage: step S141 utilizes the first high voltage VhIn the preselected area for driving multi-steady state liquid crystal display part
All primary color pixels in all pixels unit make all liquid crystal molecules that complete homeotropic state shown in Figure 13 C be presented.
Wherein, which can be the whole region of multi-steady state liquid crystal display part, can also be only that part needs
It updates the region of display, sets as needed.For example, the multistable state liquid srystal device is applied in supermarket, for showing certain
The price of kind commodity, wherein first area is used for display of commodity title " article A ", and second area is used to show the price of the commodity
" A1 member/Kg " then can only update pricing information shown by display second area, update if needing today to adjust price
For " A2 member/Kg ", at this point, second area is preselected area of this driving.
The choice phase: step S142 utilizes first choice voltage VsTarget primary color pixels are driven, so that target primary color pixels
Corresponding LCD segment remains homeotropic state;Utilize the second selection voltage VnsNon-targeted primary color pixels are driven, so that
LCD segment corresponding to non-targeted primary color pixels is from homeotropic state to flat state relaxation.
Wherein, the picture that target primary color pixels position is currently shown needs the primary color pixels opened, non-targeted primary color pixels position
The picture currently shown does not need open primary color pixels.
Evolving stage: step S143 utilizes differentiation voltage VeTarget primary color pixels and non-targeted primary color pixels are driven simultaneously,
So that LCD segment corresponding to target primary color pixels continues to remain homeotropic state, so that non-targeted primary color pixels institute is right
The LCD segment answered to flat state relaxation be changed into Figure 13 B shown in Focal conic state.
Step S144, removes evolving stage: utilizing differentiation voltage VePersistently drive target primary color pixels and non-targeted primary colours
After pixel preset time period, the differentiation voltage V is removede, so that the first flat state relaxation changed to screw pitch of target primary color pixels,
Then again to more stable flat state relaxation, so that non-targeted primary color pixels remain Focal conic state.
Wherein, the first high voltage Vh> develop voltage Ve> first choice voltage Vs> the second selection voltage Vns.Driving method
Detailed process is as shown in figure 16.
Further, as in the first embodiment, each primary color pixels is in the first electrode pattern or described
Multiple electrodes are corresponding in two electrode patterns, by controlling the achievable control to affiliated primary color pixels of each electrode
System, realizes different display effects.At this point, executing above-mentioned step S141 preparation stage, step S142 choice phase, step
Which when S143 evolving stage, can also be further refined as that electrode of primary color pixels specifically driven.
The step S141 preparation stage specifically: for all pixels in the preselected area of the multi-steady state liquid crystal display part
All primary color pixels in unit make all liquid crystal molecules be in using the preset electrode of each primary color pixels of the first high drive
Now complete homeotropic state.
It include four electrodes PR1, PR2, PR3, PR4 for example, as shown in fig. 7, for red pixel PR, it can be according to thinking
The display effect wanted selects driving wherein which electrode, such as when needing to select driving two of them electrode, can be
Electrode PR1 and PR2, are also possible to PR1 and PR4, the former show pixel granular sensation it is lower, the pixel granular sensation that the latter shows compared with
Weight.
The step S142 choice phase specifically: the preset electrode of target primary color pixels is driven using first choice voltage, with
LCD segment corresponding to target primary color pixels is set to remain homeotropic state;Non-targeted base is driven using the second selection voltage
The preset electrode of color pixel, so that LCD segment corresponding to non-targeted primary color pixels is speeded from homeotropic state to flat state
Henan.
Step S143 evolving stage specifically: drive the preset electrode of target primary color pixels and non-simultaneously using voltage is developed
The preset electrode of target primary color pixels, so that LCD segment corresponding to target primary color pixels continues to remain vertical row column-shaped
State, so that LCD segment corresponding to non-targeted primary color pixels is changed into Focal conic state to flat state relaxation.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (10)
1. a kind of multi-steady state liquid crystal display part characterized by comprising
First substrate, inside have first electrode layer, and the first electrode layer includes several first electrode patterns;
The second substrate, inside have the second electrode lay, and the second electrode lay includes several second electrode patterns;
The liquid crystal layer being sealed between the first substrate and the second substrate;
Wherein, the face part of several first electrode patterns and several second electrode patterns constitutes several pixel lists
Member, each pixel unit include multiple primary colors pixel;
Different primary color pixels LCD segment corresponding in the liquid crystal layer has different screw pitch, so that each primary colours
The LCD segment of pixel can reflect the light of corresponding wavelength.
2. multi-steady state liquid crystal display part as described in claim 1, which is characterized in that each primary color pixels is described
Multiple electrodes are corresponding in one electrode pattern or the second electrode pattern, can be achieved by controlling each electrode to institute
The control of the primary color pixels of category.
3. multi-steady state liquid crystal display part as described in claim 1, which is characterized in that the liquid crystal layer and the first electrode
There is first alignment layer between layer, there is second orientation layer between the liquid crystal layer and the second electrode lay;
The outside of the first substrate is with anti-reflection layer or anti-dazzle photosphere or anti-scratch protective layer;
The multi-steady state liquid crystal display part further includes a reflecting layer, and the reflecting layer is located at outside or the institute of the second substrate
It states between liquid crystal layer and the second electrode lay.
4. multi-steady state liquid crystal display part as described in claim 1, which is characterized in that the liquid crystal layer include liquid crystal and
The polymer of polymerization reaction can occur under action of ultraviolet light, the liquid crystal mixes with the polymer;The liquid crystal with it is described
The mass ratio of polymer is (100-70): (0-30);The polymer includes the dilution of the oligomer of 93 mass parts, 5 mass parts
The photoinitiator of agent and 2 mass parts.
5. multi-steady state liquid crystal display part as claimed in claim 4, which is characterized in that the oligomer includes 65 mass parts
Methacrylic acid -2- the hydroxy propyl ester of 2- methyl -2- acrylic acid -1,2- glycol ester and 28 mass parts;The diluent is first
Base hexyl methanol;The photoinitiator is 1- hydroxycyclohexyl phenyl ketone.
6. multi-steady state liquid crystal display part as claimed in claim 4, which is characterized in that the liquid crystal is cholesteric liquid crystal, institute
Stating cholesteric liquid crystal includes two kinds of opposite chiral agents of temperature characterisitic, the HTP value of one of chiral agent increase with temperature and
Increase, the HTP value of another chiral agent increases with temperature and reduced.
7. a kind of preparation method of multi-steady state liquid crystal display part, which is characterized in that include the following steps:
Make a liquid crystal sylphon;The liquid crystal sylphon includes that inside has the first substrate of first electrode layer, inside with second
The second substrate of electrode layer, the first electrode layer includes several first electrode patterns, if the second electrode lay includes
Dry second electrode pattern;The face part of several first electrode patterns and several second electrode patterns constitutes several pictures
Plain unit, each pixel unit include multiple primary colors pixel;
Liquid crystal containing the polymer that polymerization reaction can occurs under action of ultraviolet light is injected into the liquid crystal sylphon and is sealed,
Obtain liquid crystal cell;
For each primary color pixels, cover the liquid crystal cell using mask plate corresponding with the primary color pixels, then with this
The corresponding illumination parameter of primary color pixels carries out ultraviolet light, until LCD segment corresponding to all primary color pixels is shone
It penetrated, so that forming different primary color pixels LCD segment corresponding in the liquid crystal layer has different screw pitch.
8. preparation method as claimed in claim 7, which is characterized in that each primary color pixels is in the first electrode pattern
Or multiple electrodes are corresponding in the second electrode pattern, it can be achieved by controlling each electrode to affiliated primary colours picture
The control of element;
The liquid crystal layer includes liquid crystal and the polymer that polymerization reaction can occur under action of ultraviolet light, the liquid crystal and institute
Polymer is stated to mix;The mass ratio of the liquid crystal and the polymer is (100-70): (0-30);The polymer includes 93 matter
Measure the oligomer, the diluent of 5 mass parts and the photoinitiator of 2 mass parts of part.
9. a kind of driving method to multi-steady state liquid crystal display part as claimed in any one of claims 1 to 6, which is characterized in that
Include:
Preparation stage: all pixels unit in the preselected area of multi-steady state liquid crystal display part described in the first high voltage drive is utilized
In all primary color pixels, make all liquid crystal molecule that complete homeotropic state be presented;
Choice phase: target primary color pixels are driven using first choice voltage, so that liquid crystal portion corresponding to target primary color pixels
Divide and remains homeotropic state;Non-targeted primary color pixels are driven using the second selection voltage, so that non-targeted primary color pixels institute
Corresponding LCD segment is from homeotropic state to flat state relaxation;
Evolving stage: target primary color pixels and non-targeted primary color pixels are driven simultaneously using voltage is developed, so that target primary colours picture
LCD segment corresponding to element continues to remain homeotropic state so that LCD segment corresponding to non-targeted primary color pixels from
It is changed into Focal conic state to flat state relaxation;
Remove evolving stage: after persistently driving target primary color pixels and non-targeted primary color pixels preset time period using differentiation voltage,
The differentiation voltage is removed, so that target primary color pixels are first to the flat state relaxation of screw pitch variation, then again to more stable
Flat state relaxation, so that non-targeted primary color pixels remain Focal conic state;
Wherein, the first high voltage > differentiation voltage > first choice voltage > second selection voltage.
10. preparation method as claimed in claim 9, which is characterized in that each primary color pixels is in the first electrode figure
Multiple electrodes are corresponding in case or the second electrode pattern, can be achieved by controlling each electrode to affiliated primary colours
The control of pixel;
The preparation stage specifically: in all pixels unit in the preselected area of the multi-steady state liquid crystal display part
All primary color pixels are presented all liquid crystal molecules and hang down completely using the preset electrode of each primary color pixels of the first high drive
Straight ordered state;
The choice phase specifically: using the preset electrode of first choice voltage driving target primary color pixels, so that target base
LCD segment corresponding to color pixel remains homeotropic state;Non-targeted primary color pixels are driven using the second selection voltage
Preset electrode, so that LCD segment corresponding to non-targeted primary color pixels is from homeotropic state to flat state relaxation;
The evolving stage specifically: drive the preset electrode and non-targeted primary colours of target primary color pixels simultaneously using differentiation voltage
The preset electrode of pixel, so that LCD segment corresponding to target primary color pixels continues to remain homeotropic state, so that non-
LCD segment corresponding to target primary color pixels is changed into Focal conic state to flat state relaxation.
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