CN108037625A - A kind of color electronic paper display device of three layers of overlaying structure - Google Patents
A kind of color electronic paper display device of three layers of overlaying structure Download PDFInfo
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- CN108037625A CN108037625A CN201810095567.XA CN201810095567A CN108037625A CN 108037625 A CN108037625 A CN 108037625A CN 201810095567 A CN201810095567 A CN 201810095567A CN 108037625 A CN108037625 A CN 108037625A
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- 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
- G02F1/1347—Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells
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- 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
- G02F1/13306—Circuit arrangements or driving methods for the control of single liquid crystal cells
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- 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
- G02F1/165—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 translational movement of particles in a fluid under the influence of an applied field
- G02F1/166—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 translational movement of particles in a fluid under the influence of an applied field characterised by the electro-optical or magneto-optical effect
- G02F1/167—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 translational movement of particles in a fluid under the influence of an applied field characterised by the electro-optical or magneto-optical effect by electrophoresis
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
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- Optics & Photonics (AREA)
- Chemical & Material Sciences (AREA)
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- Mathematical Physics (AREA)
- Crystallography & Structural Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
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- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Liquid Crystal (AREA)
- Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)
Abstract
The invention discloses a kind of color electronic paper display device of three layers of overlaying structure, including multiple pixels with three layers of display unit；Three layers of display unit of pixel are followed successively by the first cholesteryl liquid crystal box, the second cholesteryl liquid crystal box and electrophoresis layer from observation side；In the sub-pixel of each layer display unit of the pixel compared with small area sub-pixel area and larger area sub-pixel area ratio be 1：N, number ratio are N：1, and the appearance profile of N number of arrangement of subpixels compared with small area appearance profile together and the sub-pixel of larger area is same or similar, wherein, N is positive integer.The segmented flexible of big, each pixel of colour mixture overlapping area of the present invention, the tonal gradation for widening display have the advantages that simple production process；Have the advantages that operating temperature is wide, color reproduction range is wide and refresh rate is fast；Have the advantages that black white contrast is high and color reproduction range is wide；With the wide height of range of color reproduction, the advantages that being easy to produce in enormous quantities.
Description
Technical field
The invention belongs to the color electric paper display dress in electronic paper technology field, more particularly to a kind of three layers of overlaying structure
Put.
Background technology
Cholesteric liquid crystal type color electric paper is to be subject to PM (passive matrix, PassiveMatrix) using individual layer or three stackings
Drive to realize a kind of display mode of full-color image presentation, these technical solutions are that have solely by cholesteric liquid crystal material
Special Bragg reflection, adjusts the pitch of cholesteric liquid crystal molecules and birefringence determines the wavelength of reflected light.By selecting to close
Suitable cholesteryl liquid crystal hybrid energy makes the light of cholesteric liquid crystal layers reflection three kinds of wavelength of red, green, blue, these three light with additive
The three primary colours of colour mixture realize full-color EL display by specific space arrangement.Cholesteric liquid crystal type color electric paper pixel is tied substantially
Structure is that every layer of difference of sandwich construction can reflect a kind of color in blue, green and red.Along the courage of three sub-pixel structures of face arrangement
Steroid liquid crystal type color electric paper, not overlapping mutually be placed on is spaced apart that can reflect blue, green, feux rouges three kinds of cholesteric crystal materials
Color overlaid is realized in same layer.Bottom is black ink light absorbing layer, and each reflecting layer (or unit) is to 3 kinds of primary colours in ambient light
The reflectivity of light accordingly changes, the primary lights of the appropriate intensity in 3 reflected kind according to colour mixture principle can be mixed into needed for certain
Kind color, shows so as to fulfill colour.Its advantage is that color effect brightness is preferable, and shortcoming is proximate to the feux rouges, white of long wave
The display effect of state is poor, and particularly white states are gloomy and the excitation purity of feux rouges is not high.
In addition to cholesteric liquid crystal type color electric paper, the technical solution of color electric paper also has many kinds, more influential
Color mode is the unfiltered scheme such as optical filter type and colour particles type, Electrowetting type, these schemes are all AM (active squares
Battle array, Active Matrix) addressing system driving.In existing display pattern, have and directly utilize KPT Scatter or liquid, solid-state
Surface reflection, also have using it is birefringent selection reflection or scattering.Using optical filtering sheet mode color electric paper technically
It is easily achieved, but colour filter can reduce light reflectivity or display brightness, while be combined into one with multiple colored sub-pixels and show
Show that pixel must be no overlapping, reduce the pixel quantity of unit area, this scheme is using reduce brightness and resolution ratio as generation
What valency showed to realize colour.The technology subdivision of colored filter, which is not required, horizontal electrophoretic techniques, inverted emulsion electrophoretic techniques, electricity
Wetness technique, interferometry modulation technique, photonic crystal are shown, electrochromic display etc..Up to the present, either where
Kind of display pattern can not all obtain preferably colored dispaly state at the same time, main limitation be chroma-luminance and color reproduction scope and
Cost.
In the R＆D direction of numerous manufacturers, the good color electric paper of comprehensive comparison has three layers of cholesteric liquid crystal type, more
The electrophoretype and three-dimensional colour mixture type that colored particle is formed.But regrettably, any of the above scheme does not still have mature market
Successful story.In color electric paper, display effect quality depends on black, white, five kinds of states of three primary colours reflected intensity
Situation.Mainly which kind of display pattern is problematic in that, three layers of cholesteric liquid crystal are of high cost, and white appearance is bad；More colored particle structures
Into electrophoretype blue-green reproduction of dark portion, refresh time length, drives stability difference poor repeatability, color particularly in single pixel
Color tablets subcategory increases, and under electric field action, waveform change is sensitive；The two-component liquid crystal cell system of three-dimensional colour mixture type color electric paper
It is big to make technology difficulty, practical application is of high cost still higher.To obtain widely application, new color electric paper pattern is invented
Colour gamut, gray scale and cost problem are solved to integrate, is very necessary.
The content of the invention
According to technical problem set forth above, and a kind of color electronic paper display device of three layers of overlaying structure is provided, its
In two cholesteryl liquid crystal boxes improve transmitance and color reflection rate using PM addressing systems, have the identical or part identical
Scan electrode, realizes the display performance of cost drive, high reflectance and wide colour gamut, this kind of color electric paper and prior art phase
Than that can realize wide spectral range, cholesteric liquid crystal box technique is relatively easy, in the technical solution of sandwich construction have driving into
This low advantage.The technological means that the present invention uses is as follows：
A kind of color electronic paper display device of three layers of overlaying structure, including multiple pixels with three layers of display unit；
Three layers of display unit of the pixel are followed successively by the first cholesteryl liquid crystal box, the second cholesteryl liquid crystal from observation side
Box and electrophoresis layer；
Compared with the sub-pixel area of small area and the sub- picture of larger area in the sub-pixel of each layer display unit of the pixel
The ratio of vegetarian noodles product is 1：N, number ratio are N：1, and N number of arrangement of subpixels compared with small area appearance profile together and larger
The appearance profile of the sub-pixel of area is same or similar, wherein, N is positive integer；When appearance profile is similar, corresponding three sons
The error at the overlapping center of three sub-pixels of each Edge Distance of pixel is less than 10%.
Assuming that the sub-pixel of minimum area (Pmin) is the sub-pixel of electrophoresis layer, the sub-pixel of maximum area (Pmax) is
The sub-pixel of one cholesteryl liquid crystal box, and the area (P) of the second cholesteryl liquid crystal box pixel is greater than or equal to the son of electrophoresis layer
Pixel, less than or equal to the sub-pixel of the first cholesteryl liquid crystal box, then there are following relation Pmin：P=1：N1, P：Pmax=1：
N2, Pmin：Pmax=1：N3.Here N1, N2 and N3 are positive integer, are the areas of three sub-pixels as N1=N2=N3=1
Equal situation.Working as N1, when N2, N3 ≠ 1, the profile of sub-pixel, must meet：At least a kind of arrangement mode makes N1 minimum
Arrangement of subpixels appearance profile together and the appearance profile of the second cholesteryl liquid crystal box pixel are same or similar；At least
A kind of arrangement mode makes the N2 appearance profiles of the second cholesteryl liquid crystal box pixel arrangement together and maximum box pixel
Appearance profile is same or similar；At least a kind of arrangement mode makes N3 minimum arrangement of subpixels appearance profile together and most
The appearance profile of big sub-pixel is same or similar；When not exactly the same, each Edge Distance three of corresponding three sub-pixels
The error at the overlapping center of sub-pixel is less than 10%.
The electrophoresis layer includes two or more electrophoresis particle, and the electrophoresis layer has independent AM driving knots
Structure realizes the change of figure；
With corresponding sub-pixel in the first, second cholesteryl liquid crystal box in independent driving ripple in the electrophoresis layer
Shape effect is lower to refresh at the same time, but the refresh signal of each sub-pixel not seek common ground to walk and carry out.The slow display unit phase of refresh rate
To refresh in advance for the fast display unit of refresh rate or refresh at the same time, and the time refreshed in advance will ensure refresh rate
Fast display unit is completed to refresh at the end of the slow display unit of refresh rate refreshes.Shown in the Electronic Paper of sandwich construction
In, the advantages of AM addressing systems is refresh rate height, and shortcoming is the limitation of aperture opening ratio, influences reflectivity and of high cost；PM is shown
Advantage be that transmitance is high low with cost, shortcoming is relatively low refresh rate.Therefore, the first cholesteryl liquid crystal box and the second courage
Steroid type liquid crystal cell is applied in the drive waveforms of PM addressing systems, and electrophoresis layer has the driving structure of independent AM addressing systems.PM
The drive waveforms of addressing system are to realize that display is applied by the shared or shared line scan signals in part and respective data-signal
On the scan electrode for adding to the first cholesteryl liquid crystal box and the second cholesteryl liquid crystal box.First cholesteryl liquid crystal
Box and the second cholesteryl liquid crystal box are by double layer substrate and sealing ring cholesteric liquid crystal layers, alignment films, show electrode and portion
The part such as line electrode is separated to seal.
The first cholesteryl liquid crystal box and the second cholesteryl liquid crystal box are applied in PM drive waveforms, and by shared
Or the shared scan electrode in part and respective data electrode apply drive signal and realize display；
Under working status, under the action of electric field, the first cholesteryl liquid crystal box and the second cholesteryl liquid crystal box
In the liquid crystal layer of correspondence scan electrode start simultaneously to form Focal conic state or plane state.
Cholesteric of the cholesteric liquid crystal molecules pitch of the first cholesteryl liquid crystal box than the second cholesteryl liquid crystal box
Type liquid crystal molecule pitch is short.When usual cholesteric liquid crystal molecules are in Focal conic state ordered state, pitch is shorter, and transmitance is higher.
In the color electric paper of each display unit superposition, in the case of reflectivity is similar, the display unit towards observer has height
Transmitance is the reflectivity for being conducive to improve display unit thereafter.
The first cholesteryl liquid crystal box, the second cholesteryl liquid crystal box are similar with the sub-pixel shape of the electrophoresis layer
Or it is identical, and the deviation of appearance profile is less than 50 μm.
The scan electrode that the first cholesteryl liquid crystal box and the second cholesteryl liquid crystal box share by being located at institute respectively
Two scan electrode compositions of the first cholesteryl liquid crystal box and the second cholesteryl liquid crystal box are stated, and are led between two scan electrodes
Cross COG+FPC or COF or TAB modes realize connection.
COG+FPC modes refer to that one end of the scan electrode of cholesteryl liquid crystal box is connected with driving IC, scan electrode
The other end is connected with the corresponding scan electrode of another cholesteryl liquid crystal box.When the scan electrode of two cholesteryl liquid crystal boxes
When part corresponds, that is, the scan electrode of a cholesteryl liquid crystal box is electric more than the scanning of another cholesteryl liquid crystal box
During pole, the starting and ending scan electrode of the few cholesteryl liquid crystal box of scan electrode, usually originates or terminates scan electrode and sweep
Retouch the initial sweep electrode of the cholesteryl liquid crystal box more than electrode or terminate scan electrode and be connected.The corresponding connection mode of others
Also can, but to make the scan electrode for the cholesteryl liquid crystal box that scan electrode lacks and the scan electrode of another cholesteryl liquid crystal box
It is connected.The data-signal of two cholesteryl liquid crystal boxes, applies driving cholesteryl liquid crystal by the different output terminals of different driving IC
Box pixel realizes display.
The PM drive waveforms being applied on corresponding two scan electrodes are produced by the same pin of same driving chip.
The scan electrode quantity phase of the scan electrode quantity of the first cholesteryl liquid crystal box and the second cholesteryl liquid crystal box
Deng or differ.
The bias of the first cholesteryl liquid crystal box and the second cholesteryl liquid crystal box can not be optimal bias.Specifically
For, it is assumed that the first cholesteryl liquid crystal box and the second cholesteryl liquid crystal box have 1 scan electrode and first from the first to the n-th respectively
A to the n-th 2 scan electrodes, the initial row (the first row) of the scan electrode of two cholesteryl liquid crystal boxes is corresponding, termination row (n1
And n2) corresponding or initial row (the first row) and termination row (n1 or n2) it is corresponding one by one.N1 and n2 can it is equal can not also
It is equal.The drive waveforms of cholesteryl liquid crystal box and electrophoresis layer start to scan after being triggered, and the refreshing frequency of row and column can be different,
It is synchronous or asynchronous.The drive waveforms of cholesteryl liquid crystal box are usually generated according to the principle of optimal bias method, can not also
It is optimum value.When line number is more, as long as selection voltage and non-selection voltage can meet the generation of plane state and Focal conic state i.e.
Can.The drive waveforms of electrophoresis layer are made of a series of positive negative pulse stuffings, realize the driving to electrophoresis particle.
The electrophoresis layer is located at substrate and the institute of the close electrophoresis layer side of the second cholesteryl liquid crystal box
Between the substrate of driving backboard for stating electrophoresis layer, and its surrounding surrounds closing by sealing material.The electrophoresis layer is to hydrone
Tolerance is weaker to be needed to seal the raising Electronic Paper service life, is located at the electrophoresis layer side by means of the second cholesteryl liquid crystal box
Substrate can effectively reduce thickness.
The first cholesteryl liquid crystal box, second are substituted for the Electronic Paper pattern of other non-cholesteryl liquid crystals and non-electrophoresis type
Cholesteryl liquid crystal box and electrophoresis layer, such as smectic liquid crystal layer, electrochromism, electrowetting isotype are applied equally to this hair
It is bright.
Compared with the prior art, the present invention realizes that color electronic paper is shown using three-decker, and existing three-dimensional colour mixture
Technology is compared, and using three-decker because of the segmented flexible of big, each pixel of the colour mixture overlapping area of sub-pixel, widens the ash of display
Degree grade has the advantages that simple production process；Compared with existing EPD technologies, have that operating temperature is wide, color reproduction range is wide
With refresh rate it is fast the advantages of；Compared with existing cholesteryl liquid crystal technology, it is high wide with color reproduction range with black white contrast
The advantages of；The color electric paper and its driving method of three layers of overlaying structure have the wide height of range of color reproduction, and it is raw to be easy to high-volume
The advantages that production, the equipment investment cost of overall reduction color electric paper, it is expected to obtain wider application.
The present invention can be widely popularized in fields such as electronic paper technologies for the foregoing reasons.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is attached drawing needed in technology description to do simply to introduce, it should be apparent that, drawings in the following description are this hairs
Some bright embodiments, for those of ordinary skill in the art, without having to pay creative labor, can be with
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is three of a kind of color electronic paper display device of three layers of overlaying structure in embodiment of the invention
The structure diagram of display unit.
Fig. 2 is the connected mode schematic diagram of COG+FPC in embodiment of the invention.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, the technical solution in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
Part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
All other embodiments obtained without making creative work, belong to the scope of protection of the invention.
To protrude inventive point, the schematic diagram of single pixel construction unit is only provided in the present embodiment, does not list three one by one
Whole composition structures of the color electronic paper display device of layer overlaying structure, have ignored here known to those skilled in the art on
Electrophoresis liquid component, electrophoresis particle color and charge polarity, interval insulant, hermetic unit shape and size, lead distribution of electrodes, number
According to the explanation of line, scan line, test cell and TFT driving unit concrete structures etc., these are to understanding that the present invention does not produce shadow
Ring.
As shown in Figure 1, the single pixel of the color electronic paper display device of three layers of overlaying structure provided in this embodiment
Three layers of display unit are followed successively by the first cholesteric liquid crystal layers 1, the second cholesteric liquid crystal layers 2 and electrophoresis layer 3 from observation side, also wrap
It is close to include interface portion 4, the first cholesteryl liquid crystal box sealing, lead electrode portion or drive division (right side) 5, the second cholesteryl liquid crystal box
Envelope portion, lead electrode portion or drive division (right side) 6, electrophoresis layer sealing, lead electrode portion or drive division (right side) 7, the first courage
Steroid type liquid crystal cell sealing, lead electrode portion or drive division (left side) 8, the second cholesteryl liquid crystal box sealing, lead electrode portion
Or drive division (left side) 9, electrophoresis layer sealing, lead electrode portion or drive division (left side) 10, first substrate 11, second substrate
12, the 3rd substrate 13, tetrabasal 14, the 5th substrate 15, drives backboard 16, the first cholesteryl liquid crystal box molecule 17, the second courage
Steroid type liquid crystal cell molecule 18, electrophoresis particle 19, the first tack coat 20 between 12 and the 3rd substrate 13 of second substrate；It is located at
The second tack coat 21 between 14 and the 5th substrate 15 of tetrabasal.Corresponding first cholesteric liquid crystal layers 1 and the second cholesteric liquid
The alignment films and data electrode of crystal layer 2 are omitted in Fig. 1, and electrophoresis particle 19 is red electrophoresis particle, black electrophore tic grain respectively
Son, white electrophoretic particles, driving backboard 16 is by the driving unit, show electrode, scan line that are attached on glass or plastic base
Formed with data cable etc..Wherein, first substrate 11, second substrate 12, the 3rd substrate 13,14 and the 5th substrate 15 of tetrabasal are equal
For PET transparent substrates, thickness is 100 microns；First substrate 11, second substrate 12, the 3rd substrate 13, tetrabasal 14 and the 5th
Electrode 15 uses ito transparent electrode material, and thickness is 2000 angstroms.The thickness of first cholesteric liquid crystal layers 1 is 4 μm, liquid crystal material
It is MDA-00-1445.Second cholesteric liquid crystal layers 2 use double bottle system MDA-00-1444 and MDA-00-1445 of MDA series
Liquid crystal, the ratio of cholesteryl liquid crystal is MDA-00-1444 (20%) and MDA-00-1445 (80%).
The sub-pixel of first cholesteryl liquid crystal box and the second cholesteryl liquid crystal box is square, and the length of side is 100 μm, as
Plain 10 μm of spacing.The error at the overlapping center of two sub-pixels of each Edge Distance of corresponding two sub-pixels is less than 10%.
The sub-pixel of electrophoresis layer 3 is square, and the length of side is 50 μm, and pel spacing is 5 μm.First cholesteryl liquid crystal box, the second cholesteric
Type liquid crystal cell and 3 sub-pixel number ratio of electrophoresis layer are 1:1:4.Fig. 2 provides the connected mode schematic diagram of COG+FPC.First cholesteric
Type liquid crystal cell, the data row in the second cholesteryl liquid crystal box and scan electrode driving use IST3025 chip drives.First courage
The scan electrode of steroid type liquid crystal cell and the second cholesteryl liquid crystal box all connects one to one.It is applied to corresponding two scanning electricity
PM drive waveforms on extremely are produced by the same pin of same driving chip.Being connected with FPC portions 22 between two scan electrodes.Electricity
The type of drive of swimming uses COG patterns, drives the COG portions 23 of cholesteryl liquid crystal and the COG portions 24 of driving electrophoresis layer to pass through COG+
The interface portion 25 of FPC connects.
The scope of the present invention widely covers to be changed including the variously-shaped arrangement of sub-pixel and sub-pixel quantity, cholesteric liquid
The liquid crystal molecule species and mixed proportion of brilliant box, the physics of pigment particles and the change of chemical property are identical with essence of the present invention.
It is emphasized that from two layers of cholesteryl liquid crystal box of direction of observation and the superposition of one layer of electrophoresis, and two layers of cholesteryl liquid crystal has portion
Point or whole identical scan electrodes.The physical dimension of overlay order and electrophoresis layer to cholesteryl liquid crystal box, type of drive, electricity
The change of number of particles in swimming layer is included in the present invention.
Finally it should be noted that：The above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe is described in detail the present invention with reference to foregoing embodiments, it will be understood by those of ordinary skill in the art that：Its according to
Can so modify to the technical solution described in foregoing embodiments, either to which part or all technical characteristic into
Row equivalent substitution；And these modifications or replacement, the essence of appropriate technical solution is departed from various embodiments of the present invention technology
The scope of scheme.
Claims (8)
1. a kind of color electronic paper display device of three layers of overlaying structure, it is characterised in that there are three layers of display list including multiple
The pixel of member；
Three layers of display unit of the pixel be followed successively by from observation side the first cholesteryl liquid crystal box, the second cholesteryl liquid crystal box and
Electrophoresis layer；
Compared with the sub-pixel area of small area and the sub-pixel face of larger area in the sub-pixel of each layer display unit of the pixel
Long-pending ratio is 1：N, number ratio are N：1, and N number of arrangement of subpixels compared with small area appearance profile together and larger area
Sub-pixel appearance profile it is same or similar, wherein, N is positive integer；
The electrophoresis layer includes two or more electrophoresis particle, and the electrophoresis layer has independent AM driving structures reality
The change of existing figure；
The first cholesteryl liquid crystal box and the second cholesteryl liquid crystal box are applied in PM drive waveforms, and pass through shared or portion
Shared scan electrode and respective data electrode is divided to apply drive signal and realize display；
Under working status, under the action of electric field, in the first cholesteryl liquid crystal box and the second cholesteryl liquid crystal box
The liquid crystal layer of corresponding scan electrode starts simultaneously to form Focal conic state or plane state.
2. the color electronic paper display device of three layers of overlaying structure according to claim 1, it is characterised in that described first
The cholesteric liquid crystal molecules pitch of cholesteryl liquid crystal box is shorter than the cholesteric liquid crystal molecules pitch of the second cholesteryl liquid crystal box.
3. the color electronic paper display device of three layers of overlaying structure according to claim 1, it is characterised in that described first
The sub-pixel shape of cholesteryl liquid crystal box, the second cholesteryl liquid crystal box and the electrophoresis layer is similar or identical, and shape wheel
Wide deviation is less than 50 μm.
4. the color electronic paper display device of three layers of overlaying structure according to claim 1, it is characterised in that described first
The scan electrode that cholesteryl liquid crystal box and the second cholesteryl liquid crystal box share by being located at first cholesteryl liquid crystal respectively
Box and the second cholesteryl liquid crystal box two scan electrodes composition, and between two scan electrodes by COG+FPC or COF or
TAB modes realize connection.
5. the color electronic paper display device of three layers of overlaying structure according to claim 4, it is characterised in that be applied to pair
The PM drive waveforms on two scan electrodes answered are produced by the same pin of same driving chip.
6. the color electronic paper display device of three layers of overlaying structure according to claim 1, it is characterised in that described first
The scan electrode quantity of cholesteryl liquid crystal box and the scan electrode quantity of the second cholesteryl liquid crystal box are equal or different.
7. the color electronic paper display device of three layers of overlaying structure according to claim 1, it is characterised in that described first
The bias of cholesteryl liquid crystal box and the second cholesteryl liquid crystal box can not be optimal bias.
8. the color electronic paper display device of three layers of overlaying structure according to claim 1, it is characterised in that the electrophoresis
Layer drives backboard positioned at the substrate of close the electrophoresis layer side of the second cholesteryl liquid crystal box and the electrophoresis layer
Between substrate, and its surrounding surrounds closing by sealing material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810095567.XA CN108037625B (en) | 2018-01-31 | 2018-01-31 | Color electronic paper display device with three-layer superposition structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810095567.XA CN108037625B (en) | 2018-01-31 | 2018-01-31 | Color electronic paper display device with three-layer superposition structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108037625A true CN108037625A (en) | 2018-05-15 |
| CN108037625B CN108037625B (en) | 2023-08-15 |
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