CN102193224B - Display panel and display driving method thereof - Google Patents
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- CN102193224B CN102193224B CN201010130227.XA CN201010130227A CN102193224B CN 102193224 B CN102193224 B CN 102193224B CN 201010130227 A CN201010130227 A CN 201010130227A CN 102193224 B CN102193224 B CN 102193224B
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- 238000000034 method Methods 0.000 title claims abstract description 27
- 239000004986 Cholesteric liquid crystals (ChLC) Substances 0.000 claims abstract description 136
- 239000002245 particle Substances 0.000 claims abstract description 113
- 239000000758 substrate Substances 0.000 claims abstract description 77
- 239000003094 microcapsule Substances 0.000 claims abstract description 37
- 230000031700 light absorption Effects 0.000 claims abstract description 15
- 230000003098 cholesteric effect Effects 0.000 claims description 34
- 239000013078 crystal Substances 0.000 claims description 26
- 239000012530 fluid Substances 0.000 claims description 23
- 239000008187 granular material Substances 0.000 claims description 11
- 230000000694 effects Effects 0.000 abstract description 15
- 238000004519 manufacturing process Methods 0.000 abstract description 11
- 239000007788 liquid Substances 0.000 abstract description 10
- 239000004973 liquid crystal related substance Substances 0.000 description 21
- 239000003086 colorant Substances 0.000 description 15
- 238000005516 engineering process Methods 0.000 description 13
- 230000005684 electric field Effects 0.000 description 6
- 238000001962 electrophoresis Methods 0.000 description 5
- 239000002775 capsule Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000004043 dyeing Methods 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000012856 packing Methods 0.000 description 3
- WNJSKZBEWNVKGU-UHFFFAOYSA-N 2,2-dimethoxyethylbenzene Chemical compound COC(OC)CC1=CC=CC=C1 WNJSKZBEWNVKGU-UHFFFAOYSA-N 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000003487 electrochemical reaction Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000004005 microsphere Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000010412 perfusion Effects 0.000 description 1
- 239000001054 red pigment Substances 0.000 description 1
- 238000002310 reflectometry Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- YEIGUXGHHKAURB-UHFFFAOYSA-N viridine Natural products O=C1C2=C3CCC(=O)C3=CC=C2C2(C)C(O)C(OC)C(=O)C3=COC1=C23 YEIGUXGHHKAURB-UHFFFAOYSA-N 0.000 description 1
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Abstract
A display panel and a display driving method thereof, wherein the display panel includes: an electronic paper display upper substrate; an electronic paper display lower substrate; the microcapsule is positioned between the electronic paper display upper substrate and the electronic paper display lower substrate; the microcapsule comprises a black base liquid, first color particles and second color particles, wherein the polarities of the first color particles and the second color particles are opposite; the lower cholesteric liquid crystal display substrate is positioned on the upper electronic paper display substrate; a cholesteric liquid crystal display upper substrate; the cholesteric liquid crystal layer is positioned between the upper cholesteric liquid crystal display substrate and the lower cholesteric liquid crystal display substrate and contains cholesteric liquid crystal which reflects third color light; and the light absorption layer is positioned between the cholesteric liquid crystal layer and the lower cholesteric liquid crystal display substrate and is distributed in the third color sub-pixel area. The invention can realize low-power consumption full-color display, and has simple manufacturing process, good display effect and low cost.
Description
Technical field
The present invention relates to display panel field, particularly relate to Electronic Paper display field and bistable state cholesteric phase field of liquid crystal display.
Background technology
Electronic Paper (E-Paper) and bistable state cholesteric phase liquid crystal display (cholesteric phase liquidcrystal, CHLC) pattern is with the soft display effect of its lower energy resource consumption and similar paper and the prospect expection that can substitute paper, is more and more subject to the welcome in market.Its outstanding retention performance is very suitable for the static state display product of text reading one class.
E-paper has the display mode such as microcapsules, screw, micro-cup, electrochemical reaction, wherein comparatively conventional is the display mode of microcapsules, its ultimate principle is: there is charged particle inside electrophoresis liquid, these charged particles can move under the effect of electric field, and can reflect surround lighting, as paper, show image received by human eye; At picture translate phase, according to electrophoresis liquid two ends alive size and time can control the position at charged corpuscle place inside electrophoresis liquid, thus the power controlling reflected light realizes GTG display; Keep the stage at picture, make electrophoresis liquid two ends equipotential, make charged corpuscle holding position thus tableaux can be kept with low energy consumption inside electrophoresis liquid, realize tableaux display.
The displaying principle of bistable state CHLC pattern is under no-voltage, liquid crystal is in P (Planar Texture) state, P state is reflection state, and the wavelength of reflected light and the pitch of liquid crystal match, and realizes GTG display according to the power of the position control reflected light of liquid crystal between two substrates; When liquid crystal two ends making alive, when making cholesteric liquid crystal be in H (Homeotropic Texture) state, liquid crystal is transparent, when voltage is dropped to zero fast, liquid crystal molecule directly gets back to P state, if voltage is slowly reduced, liquid crystal molecule is by rotation and be stuck in FC (Focal Conic Texture) state, and when FC state, liquid crystal molecule is in multidomain state, incident light can not reflect but diffuse scattering, can not realize picture display.
The technology realizing low-power consumption full-color EL display at present mainly contains following several:
(1) colorful optical filter array is set at the upper substrate of the E-paper of black and white double-colored display, by applying driving voltage respectively in R, G, B subpixel area, realizes colored display, but the reflection characteristic of display panel can be reduced like this, affecting display effect.
Or adopt the display packing of screw, prepare multicoloured microballoon.But because multicoloured microspheres is complicated, there is the problem that volume production difficulty is large.
Or make the particle comprising R, G, B tri-kinds of colors in each microcapsules of E-paper, or E-paper uses a kind of dyeing liquid of color, comprises the particle of another two kinds of different colours in each microcapsules; Require that the particle of different colours has different Zeta potentials, so just can control color to display by the direction and time controlling applying electric field." electric ink and Electronic Paper " (Page71-72,2006) that more detailed description can be write see Zhao Xiaopeng etc.
Adopt and make the particle comprising three kinds of colors in each capsule, base fluid selects the technology of the liquid of black to realize full-color EL display, but the driving process of its shades of colour display is complicated and need the longer response time; And in E-Paper microcapsules, comprise the technology of the particle of two kinds of different colours and the dyeing base fluid of another color, dark-state display can not be realized.
(2) when selecting CHLC display mode to realize full-color EL display, " RGB three-layer structure " pattern of employing: the bistable state cholesteric phase display panels being about to can reflect respectively three of R, G, B light monochromatic bonds together, by controlling the voltage of R, G or B pixel correspondence position in three display panels respectively and going electric mode to realize color to display.About the more detailed description of this kind of technology can with reference to K.Hashimoto, M.Okada, K.Nishguchi, N.Masazumi, E.Yamakawa, andT.Taniguchi " Reflective Color Display using Cholesteric Liquid Crystals ", SIDInt.Symp.Dig.Tech.Paper, 29,1998.
But CHLC display mode is because substrate number is too many, between substrate, the refraction of light can cause luminance loss to increase, and affects display effect, and substrate increased number makes module thickness increase, and adds the cost of product and the thickness of product.
(3) employing " injection of Pixel-level vacuum " technical point three perfusions R, G, B tri-look cholesteric liquid crystal between two substrates, the liquid crystal of different colours is separated by previously prepared strip structure, is distributed in the pixel region of corresponding color; Also can adopt double-decker for improving reflectivity, namely display surface plate is made up of above-mentioned two display boards and a half-wave plate.About the more detailed description of this kind of technology can with reference to Kuan-Ting Chen, Yuan-Chang Liao, Jen-Chieh Yang, Jyh-Wen Shiu, Yi-Shou Tsai, Kuan-wei wu, Chich-Jen Chen, Chien-Jen Chen, Chien-ChihHSU, and Cheng-Chung Wu, " High Performance Full Color Cholesteric LiquidCrystal Display with Dual Stacking Structure ", Page0-2, SID 09DIGEST.
But this kind of technology making technology is complicated, and because exist for separating of the strip structure with closed different liquid crystal, makes effective display area reduce.
Summary of the invention
The problem that the present invention solves is to provide a kind of display panel, realize low-power consumption full-color EL display, and manufacturing process is simple, display effect is good, cost is low.
For solving the problem, the invention provides a kind of display panel, comprising:
Electronic Paper display upper substrate;
Electronic Paper display infrabasal plate;
Microcapsules between described Electronic Paper display upper substrate and Electronic Paper display infrabasal plate; Comprise black base fluid in described microcapsules, the first colored particle and the second colored particle, the polarity of described first colored particle and the second colored particle is contrary;
Cholesteric liquid crystal display infrabasal plate, is positioned on described Electronic Paper display upper substrate;
Cholesteric liquid crystal display upper substrate;
Cholesteric crystal layer, between described cholesteric liquid crystal display upper substrate and described cholesteric liquid crystal display infrabasal plate, it contains the cholesteric liquid crystal of reflection the 3rd color of light;
Light-absorption layer, between described cholesteric crystal layer and described cholesteric liquid crystal display infrabasal plate, and is distributed in the 3rd color sub-pixels region.
Optionally, described first colored particle is red granules, and described second colored particle is green particles, and the cholesteric liquid crystal of described reflection the 3rd color of light is the cholesteric liquid crystal of reflect blue.
Optionally, described first colored particle is red granules, and described second colored particle is blue particle, and the cholesteric liquid crystal of described the third color of light of reflection is the cholesteric liquid crystal of reflect green light.
Optionally, described first colored particle is blue particle, and described second colored particle is green particles, and the cholesteric liquid crystal of described reflection the 3rd color of light is the cholesteric liquid crystal of reflect red.
The present invention also provides a kind of display drive method of described display panel, comprising:
The two ends of the described cholesteric liquid crystal in the first color sub-pixels region apply voltage, make the cholesteric liquid crystal in described first color sub-pixels region be in clear state;
The two ends of the described cholesteric liquid crystal in the second color sub-pixels region apply voltage, make the cholesteric liquid crystal in described second color sub-pixels region be in clear state;
The two ends of the described cholesteric liquid crystal in the 3rd color sub-pixels region apply voltage, and are reduced fast by voltage, make the cholesteric liquid crystal in described 3rd color sub-pixels region can reflect the 3rd color of light;
The two ends of the described microcapsules in the first color sub-pixels region apply the opposite polarity voltage with described first colored particle, make described first colored particle near described Electronic Paper display upper substrate;
Apply the opposite polarity voltage with described second colored particle at the two ends of the described microcapsules of the subpixel area of the second color, make described second colored particle near described Electronic Paper display upper substrate.
Optionally, the two ends of the described described cholesteric liquid crystal in the 3rd color sub-pixels region apply voltage, and voltage is reduced fast comprise: voltage is reduced to zero fast, makes the cholesteric liquid crystal in described 3rd color sub-pixels region be in P state, the 3rd color of light can be reflected completely;
Described first colored particle is comprised: make described first colored particle be positioned at described Electronic Paper display upper substrate near described Electronic Paper display upper substrate;
Described second colored particle is comprised: make described second colored particle be positioned at described Electronic Paper display upper substrate near described Electronic Paper display upper substrate.
The present invention also provides the display drive method of another kind of described display panel, it is characterized in that, comprising:
The two ends of the described cholesteric liquid crystal in the first color sub-pixels region apply voltage, make the cholesteric liquid crystal in described first color sub-pixels region be in clear state;
The two ends of the described cholesteric liquid crystal in the second color sub-pixels region apply voltage, make the cholesteric liquid crystal in described second color sub-pixels region be in clear state;
The two ends of the described cholesteric liquid crystal in the 3rd color sub-pixels region apply voltage, and voltage is slowly reduced to zero;
Apply the first voltage at the two ends of the described microcapsules in the first color sub-pixels region and the second color sub-pixels region, make described first colored particle and the second colored particle gather described Electronic Paper display upper substrate and Electronic Paper display infrabasal plate respectively;
The two ends of the described microcapsules in the first color sub-pixels region and the second color sub-pixels region apply opposite polarity second voltage with described first voltage, make described first colored particle and the second colored particle move to precalculated position, absorb whole incident light to enable described black base fluid.
Display panel of the present invention by the display technique of two kinds of low-power consumption as cholesteric liquid crystal display technique and Electronic Paper display technique combine, when color display, wherein a sub-pixel color shows upper substrate by cholesteric liquid crystal, cholesteric liquid crystal shows infrabasal plate, cholesteric crystal layer and light-absorption layer and jointly realize for R, G, B, and the microcapsules of the another two sub pixel particles that the display of other two sub-pixel color is shown upper substrate by Electronic Paper, Electronic Paper shows infrabasal plate, black base fluid and comprised oppositely charged realize jointly.
The existing technology comprising the particle of two kinds of different colours and the dyeing base fluid of another color can not realize dark-state display, and display panel of the present invention includes black base fluid can realize dark-state display;
Adopt in each capsule and comprise three kinds of colored particle, base fluid is selected the liquid driven process of black complicated and is needed the longer response time, the particle of two kinds of colors is only comprised in display panel microcapsules of the present invention, only need control to execute in corresponding sub-pixel area the GTG display that namely alive direction and time can complete respective color, driving method is simple, and the response time is short.
The display packing of polychlormal balls, due to polychlormal balls complicated process of preparation, volume production difficulty is large, display panel of the present invention comprises cholesteric liquid crystal display upper substrate, cholesteric liquid crystal display infrabasal plate, cholesteric crystal layer and the light-absorption layer of cholesteric phase display layer, and the Electronic Paper display upper substrate of Electronic Paper display layer, Electronic Paper display infrabasal plate, black base fluid and comprise the microcapsules of another two sub pixel particles of oppositely charged, its preparation technology is simple, can carry out volume production.
Existing employing RGB three-layer structure, select CHLC display mode to realize full-color EL display, number of substrates is many, and the present invention is few due to number of substrates, reduces substrate to the refraction of incident light, has the advantage that display effect is good; And due to number of substrates few, display panel thickness reduce, reduce manufacturing cost.
Further, display panel cholesteric crystal layer of the present invention is same cholesteric liquid crystal, and pour into for three times without the need to dividing liquid crystal, therefore manufacturing process is simple; And, owing to being same cholesteric liquid crystal, without the need to being separated and closing the strip structure of different liquid crystal, can effective display area be increased, improve display effect.
Accompanying drawing explanation
Fig. 1 is the perspective view of the display panel of the present invention first specific embodiment;
Fig. 2 is the principle of work schematic diagram of the display on state of of the display panel of the present invention first specific embodiment shown in Fig. 1;
Fig. 3 is the principle of work schematic diagram of the display dark-state of the display panel of the present invention first specific embodiment shown in Fig. 1;
Fig. 4 is the perspective view of the display panel of the present invention second specific embodiment;
Fig. 5 is the perspective view of the display panel of the present invention the 3rd specific embodiment.
Embodiment
Bistable state cholesteric phase lcd technology and Electronic Paper display technique combine by the present invention, by adjusting the voltage of cholesteric liquid crystal display layer three sub-pixel area, the state of the cholesteric liquid crystal in adjustment different subpixel district, bistable state cholesteric phase liquid crystal display layer can be made to show red, wherein a kind of color in green and blueness, and in Electronic Paper display layer microcapsules, only can comprise the particle of the oppositely charged of another two kinds of colors, the position of particle in microcapsules of another two kinds of colors is controlled by controlling to be added in the voltage of the corresponding sub-pixel area of another two kinds of colors and time, thus the particle that can control another two kinds of colors is to the power of the reflection of incident ray, realize showing the GTG of other two kinds of colors, thus display panel of the present invention can realize the full color display of low-power consumption.
In order to make those skilled in the art can better understand essence of the present invention, also in order to make the present invention clearer, complete, be described in detail below in conjunction with the display panel of accompanying drawing to the specific embodiment of the invention.
Fig. 1 is the perspective view of the display panel of the present invention first specific embodiment, and with reference to figure 1, display panel of the present invention comprises: cholesteric liquid crystal display layer 10 and Electronic Paper display layer 20; Wherein, described Electronic Paper display layer 20 comprises: Electronic Paper display upper substrate 21; Electronic Paper display infrabasal plate 22; Microcapsules 23, between described Electronic Paper display upper substrate 21 and Electronic Paper display infrabasal plate 22, black base fluid (not shown) is comprised in described microcapsules 23, the first colored particle 24 and the second colored particle 25, the polarity of described first colored particle 24 and the second colored particle 25 is contrary, in the specific embodiments of the invention shown in Fig. 1, the first colored particle is respectively red granules, positively charged, second colored particle is green particles, electronegative; Described cholesteric liquid crystal display layer 10 comprises: cholesteric liquid crystal display infrabasal plate 12, is positioned on described Electronic Paper display upper substrate 21; Cholesteric liquid crystal display upper substrate 11; Cholesteric crystal layer 13, between described cholesteric liquid crystal display upper substrate 11 and described cholesteric liquid crystal display infrabasal plate 12, the cholesteric liquid crystal 15 of reflection the 3rd color of light is comprised in it, in this first specific embodiment, for the cholesteric liquid crystal of reflect blue, cholesteric liquid crystal 15 in Fig. 1 is only signal effect, can play the state representing cholesteric liquid crystal; Light-absorption layer 14, between described cholesteric crystal layer 13 and described cholesteric liquid crystal display infrabasal plate 12, and is distributed in the 3rd color sub-pixels region, in the specific embodiment shown in Fig. 1, light-absorption layer 14 is distributed in and blue B sub-pixel region.
Wherein, in a particular embodiment of the present invention, the cholesteric liquid crystal that described cholesteric liquid crystal 14 is an only wherein sub-pixel color described in reflection, namely the cholesteric liquid crystal that R, G, B tri-subpixel area comprise in cholesteric crystal layer 13 is same cholesteric liquid crystal, in the specific embodiment shown in Fig. 1, the cholesteric liquid crystal in cholesteric crystal layer 13 is can the cholesteric liquid crystal of reflect blue.
The foregoing is only a specific embodiment of the present invention, those skilled in the art can know other embodiment by inference according to essence of the present invention, the second specific embodiment of the present invention such as shown in Fig. 4, the light-absorption layer 14 of cholesteric liquid crystal display layer 10 is distributed in the position relative with G sub-pixel area, absorb the light from the incidence of G sub-pixel area, the two kinds of oppositely charged colored particle comprised in the microcapsules 23 of Electronic Paper display layer 20 are red granules 24 ' and blue particle 25 ', in this second specific embodiment, cholesteric liquid crystal display layer 10 shows green, Electronic Paper display layer 20 shows redness and blueness, its concrete displaying principle is with the first specific embodiment, do not repeat at this.
The 3rd specific embodiment of the present invention shown in Fig. 5, the light-absorption layer 14 of cholesteric liquid crystal display layer 10 is distributed in the position relative with R sub-pixel area, absorb the light from the incidence of R sub-pixel area, the two kinds of oppositely charged colored particle comprised in the microcapsules 23 of Electronic Paper display layer 20 are green particles 24 " and blue particle 25 ", in the 3rd specific embodiment, cholesteric liquid crystal display layer 10 shows redness, Electronic Paper display layer 20 shows green and blueness, its concrete displaying principle, with the first specific embodiment, does not repeat at this.The display drive method of above-described display panel, comprising:
The two ends of the described cholesteric liquid crystal in the first color sub-pixels region apply voltage, make the cholesteric liquid crystal in described first color sub-pixels region be in clear state;
The two ends of the described cholesteric liquid crystal in the second color sub-pixels region apply voltage, make the cholesteric liquid crystal in described second color sub-pixels region be in clear state;
The two ends of the described cholesteric liquid crystal in the 3rd color sub-pixels region apply voltage, and are reduced fast by voltage, make the cholesteric liquid crystal in described 3rd color sub-pixels region can reflect the 3rd color of light;
The two ends of the described microcapsules in the first color sub-pixels region apply the opposite polarity voltage with described first colored particle, make described first colored particle near described Electronic Paper display upper substrate;
Apply the opposite polarity voltage with described second colored particle at the two ends of the described microcapsules of the subpixel area of the second color, make described second colored particle near described Electronic Paper display upper substrate.
Wherein, the two ends of the described described cholesteric liquid crystal in the 3rd color sub-pixels region apply voltage, and voltage is reduced fast comprise: voltage is reduced to zero fast, makes the cholesteric liquid crystal in described 3rd color sub-pixels region be in P state, the 3rd color of light can be reflected completely; Described first colored particle is comprised: make described first colored particle be positioned at described Electronic Paper display upper substrate near described Electronic Paper display upper substrate; Described second colored particle is comprised: make described second colored particle be positioned at described Electronic Paper display upper substrate near described Electronic Paper display upper substrate.Under this kind of driving condition, display panel display on state of.
Another kind of display drive method of the present invention, this display drive method is the display drive method of display panel when showing black state, comprising:
The two ends of the described cholesteric liquid crystal in the first color sub-pixels region apply voltage, make the cholesteric liquid crystal in described first color sub-pixels region be in clear state;
The two ends of the described cholesteric liquid crystal in the second color sub-pixels region apply voltage, make the cholesteric liquid crystal in described second color sub-pixels region be in clear state;
The two ends of the described cholesteric liquid crystal in the 3rd color sub-pixels region apply voltage, and voltage is slowly reduced to zero;
Apply the first voltage at the two ends of the described microcapsules in the first color sub-pixels region and the second color sub-pixels region, make described first colored particle and the second colored particle gather described Electronic Paper display upper substrate and Electronic Paper display infrabasal plate respectively;
The two ends of the described microcapsules in the first color sub-pixels region and the second color sub-pixels region apply opposite polarity second voltage with described first voltage, make described first colored particle and the second colored particle move to precalculated position, absorb whole incident light to enable described black base fluid.
The display driver principle of work of display panel of the present invention is described below in conjunction with Fig. 1, Fig. 2 and Fig. 3, wherein, the on state of principle of work schematic diagram that Fig. 2 is the display panel of the specific embodiment of the invention shown in Fig. 1; The dark-state principle of work schematic diagram that Fig. 3 is the display panel of the specific embodiment of the invention shown in Fig. 1.Below can the cholesteric liquid crystal of reflect blue to comprise in cholesteric crystal layer 13, light-absorption layer 14 is between described cholesteric crystal layer and described cholesteric liquid crystal display infrabasal plate, and be distributed in and blue subpixel areas, the red granules and the electronegative green particles that comprise positively charged in microcapsules 23 are that the principle of work of example to the display drive method of display panel of the present invention elaborates.
With reference to figure 2, the principle of work of display panel display on state of is: in cholesteric liquid crystal display layer 10, cholesteric liquid crystal 15 two ends of R sub-pixel area and G sub-pixel area add the high pressure (about 30V) of a direct current, the cholesteric liquid crystal of R sub-pixel area and G sub-pixel area is made to be in H (Homeotropic Texture) state, i.e. clear state, cholesteric liquid crystal does not reflect incident light, the ght transmission of the R sub-pixel area and G sub-pixel area that are incident on cholesteric crystal layer 10 crosses cholesteric crystal layer 13, and cholesteric crystal layer 10 does not show redness and green; After the cholesteric liquid crystal two ends of B sub-pixel area add DC high voltage, voltage being dropped to zero fast makes liquid crystal molecule directly get back to P state, namely state is reflected, the now light of the blue wavelength that the cholesteric liquid crystal reflection of the B sub-pixel area of cholesteric crystal layer 10 is incident, display is blue.In Electronic Paper display layer 20, a negative voltage is added in R sub-pixel area, after certain hour, the red pigment particle 24 of positively charged can gather the R sub-pixel area of Electronic Paper display upper substrate 21 under the effect of electric field, because the cholesteric liquid crystal of the R sub-pixel area in cholesteric liquid crystal display layer 10 is in H state, i.e. clear state, so incident light can arrive the Electronic Paper display upper substrate 21 of Electronic Paper display layer 20 through the cholesteric crystal layer of R sub-pixel area, and be incident to red granules 24 by Electronic Paper display upper substrate 21, red granules 24 reflects incident ruddiness, do not absorbed by black base fluid by the incident ray reflected, the ruddiness of reflection is through cholesteric crystal layer 10 outgoing, now display panel display is red, electronegative green particles 25 moves to Electronic Paper display infrabasal plate 22 under the effect of electric field, after a certain time away from Electronic Paper display upper substrate 21 certain distance, this distance need meet the condition that green particles 25 does not reflect the incident light in R sub-pixel area, this is general knowledge known in this field, do not repeat at this, a positive voltage is added in G sub-pixel area, after certain hour, electronegative viridine green particle 25 gathers the B sub-pixel area of Electronic Paper display upper substrate 21 under the effect of electric field, because the cholesteric liquid crystal of the B sub-pixel area in cholesteric liquid crystal display layer 10 is in H state, i.e. clear state, so incident light can arrive the Electronic Paper display upper substrate 21 of Electronic Paper display layer 20 through the cholesteric crystal layer of B sub-pixel area, and be incident to green particles 25 by Electronic Paper display upper substrate 21, green particles 25 reflects incident green glow, do not absorbed by black base fluid by the incident ray reflected, the green light cholesteric crystal layer outgoing of reflection, now display panel display is green, the red granules 24 of positively charged moves to Electronic Paper display infrabasal plate 22 under the effect of electric field, after a certain time away from Electronic Paper display upper substrate 21 certain distance, this distance need meet the condition that red granules 24 does not reflect the incident light in G sub-pixel area, by controlling the voltage swing added, the size of time and capsule can meet this condition, this is general knowledge known in this field, do not repeat at this, because cholesteric crystal layer 13 has light-absorption layer 14 at B sub-pixel area relative position, absorbed from the light of B sub-pixel area incidence by light-absorption layer 14, so arrange the blueness display that can not affect B sub-pixel at the voltage of Electronic Paper display layer 20.After the redness of display panel display, green and blue mixing on the screen of display panel display white picture, namely display panel is that on state of shows.
With reference to figure 3, displaying principle during display panel display dark-state is: in cholesteric liquid crystal display layer 10, the cholesteric liquid crystal two ends of R sub-pixel area and G sub-pixel area add DC high voltage (about 30V), the liquid crystal molecule of R sub-pixel area and G sub-pixel area is in H state, i.e. clear state; After the cholesteric liquid crystal two ends of B sub-pixel area add DC high voltage, voltage is slowly reduced, cholesteric liquid crystal molecule is by rotation and be stagnantly parked in FC (Focal Conic Texture) state, because liquid crystal molecule is in multidomain state when FC state, so incident light 70 can not reflect but diffuse scattering, light-absorption layer 14 absorbs most of scattered light, and therefore B sub-pixel area can show dark-state.In Electronic Paper display layer 20, a resetting voltage (high-low voltage can) is added in the both sides of R sub-pixel area, colored particle 24,25 is made to accumulate in Electronic Paper display upper substrate 21 and Electronic Paper display infrabasal plate 22 respectively, and then apply the reverse voltage of a period of time, colored particle 24,25 is made to move to the centre position recession power down pressure of black base fluid, such incident light is absorbed by black base fluid through after cholesteric liquid crystal display layer 10, is shown as dark-state; The principle of dark-state is shown with R sub-pixel area in G sub-pixel area.Display panel realizes dark-state display thus.In a particular embodiment of the present invention, for convenience of description, colored particle 24,25 is when the centre position of black base fluid, display panel is dark-state display, in other specific embodiments, the position of colored particle 24,25 in black base fluid might not in centre position, as long as meet colored particle 24,25 not emission of light, incident light is absorbed by black base fluid.
The above be display panel of the present invention display on state of and dark-state time displaying principle, the principle of work of display panel of the present invention display full color can be known by inference: by controlling to be applied to the voltage of cholesteric crystal layer R sub-pixel area and G sub-pixel area according to the common practise those skilled in the art of this area, the cholesteric liquid crystal of R sub-pixel area and G sub-pixel area is made to be in H state, i.e. clear state, make the light transmissive being incident on R sub-pixel area and G sub-pixel area to Electronic Paper display layer, and do not reflect the incident light; By controlling the voltage and the time that are applied to cholesteric crystal layer B sub-pixel area, the cholesteric liquid crystal of B sub-pixel area is made to be in different angles strong and weak to the reflection of blue light to the cholesteric liquid crystal of control B sub-pixel area, realize the blue GTG display of B sub-pixel, wherein light-absorption layer is only distributed in the position relative with B pixel region in this instance, be used for absorbing the blue light of cholesteric liquid crystal scattering of B sub-pixel area, enter in Electronic Paper display layer with the blue light of the cholesteric liquid crystal scattering preventing B sub-pixel area and cause colour mixture; By controlling the voltage and the time that are applied to Electronic Paper display layer R sub-pixel area and G sub-pixel area, make the reddish particle moving in the microcapsules of R sub-pixel area to certain position showing upper substrate near Electronic Paper, reflect the ruddiness from the R sub-pixel area transmission of cholesteric liquid crystal display layer, realize the GTG display of ruddiness, make the viridant particle moving in the microcapsules of G sub-pixel area to certain position showing upper substrate near Electronic Paper, reflect the green glow from the G sub-pixel area transmission of cholesteric liquid crystal display layer, realize the GTG display of green glow.After the ruddiness with certain GTG shown, green glow and blue light, color display on screen can be made.
In the description only for the display panel that the present invention first specifically implements, display drive method of the present invention is described in detail, about the display drive method of other embodiments, can know by inference according to the principle of work of described display drive method, not repeat at this.
In the present invention, the light of the pitch of cholesteric liquid crystal and its reflection Wavelength matched, this is general knowledge known in this field, does not describe in detail at this.
The existing technology comprising the particle of two kinds of different colours and the dyeing base fluid of another color can not realize dark-state display, and display panel of the present invention can realize dark-state display;
Adopt in each capsule comprise three kinds of colored particle, liquid that base fluid selects black, it drives process complicated and needs the longer response time, the particle of two kinds of colors is only comprised in display panel microcapsules of the present invention, only need control to execute in corresponding sub-pixel area the GTG display that namely alive direction and time can complete respective color, driving method is simple, and the response time is short.
The display packing of polychlormal balls, due to polychlormal balls complicated process of preparation, volume production difficulty is large, display panel of the present invention comprises cholesteric liquid crystal display upper substrate, cholesteric liquid crystal display infrabasal plate, cholesteric crystal layer and the light-absorption layer of cholesteric phase display layer, and the Electronic Paper display upper substrate of Electronic Paper display layer, Electronic Paper display infrabasal plate and comprise the microcapsules of another two sub-pixel color particles of black base fluid, oppositely charged, its preparation technology is simple, can carry out volume production.
Existing employing RGB three-layer structure, select CHLC display mode to realize full-color EL display, number of substrates is many, and the present invention is few due to number of substrates, reduces substrate to the refraction of incident light, has the advantage that display effect is good; And due to number of substrates few, display panel thickness reduce, reduce manufacturing cost.
Further, display panel of the present invention, cholesteric crystal layer is same cholesteric liquid crystal, and pour into for three times without the need to dividing liquid crystal, therefore manufacturing process is simple; And, owing to being same cholesteric liquid crystal, without the need to being separated and closing the strip structure of different liquid crystal, can effective display area be increased, improve display effect.
The foregoing is only specific embodiments of the invention; spirit of the present invention is better understood in order to make those skilled in the art; but protection scope of the present invention not with the specific descriptions of this specific embodiment for limited range; any those skilled in the art without departing from the spirit of the scope of the invention; can make an amendment specific embodiments of the invention, and not depart from protection scope of the present invention.
Claims (7)
1. a display panel, is characterized in that comprising:
Cholesteric liquid crystal display layer and Electronic Paper display layer;
Described Electronic Paper display layer comprises:
Electronic Paper display upper substrate;
Electronic Paper display infrabasal plate;
Microcapsules between described Electronic Paper display upper substrate and Electronic Paper display infrabasal plate; Comprise black base fluid in described microcapsules, the first colored particle and the second colored particle, the polarity of described first colored particle and the second colored particle is contrary;
Described cholesteric liquid crystal display layer comprises:
Cholesteric liquid crystal display infrabasal plate, is positioned on described Electronic Paper display upper substrate;
Cholesteric liquid crystal display upper substrate;
Cholesteric crystal layer, between described cholesteric liquid crystal display upper substrate and described cholesteric liquid crystal display infrabasal plate, it contains the cholesteric liquid crystal of reflection the 3rd color of light;
Light-absorption layer, between described cholesteric crystal layer and described cholesteric liquid crystal display infrabasal plate, and is distributed in the 3rd color sub-pixels region.
2. display panel as claimed in claim 1, described first colored particle is red granules, and described second colored particle is green particles, and the cholesteric liquid crystal of described reflection the 3rd color of light is the cholesteric liquid crystal of reflect blue.
3. display panel as claimed in claim 1, it is characterized in that, described first colored particle is red granules, and described second colored particle is blue particle, and the cholesteric liquid crystal of described the third color of light of reflection is the cholesteric liquid crystal of reflect green light.
4. display panel as claimed in claim 1, it is characterized in that, described first colored particle is blue coloured particles, and described second colored particle is green particles, and the cholesteric liquid crystal of described reflection the 3rd color of light is the cholesteric liquid crystal of reflect red.
5. a display drive method for display panel described in any one of Claims 1-4, is characterized in that, comprising:
The two ends of the described cholesteric liquid crystal in the first color sub-pixels region apply voltage, make the cholesteric liquid crystal in described first color sub-pixels region be in clear state;
The two ends of the described cholesteric liquid crystal in the second color sub-pixels region apply voltage, make the cholesteric liquid crystal in described second color sub-pixels region be in clear state;
The two ends of the described cholesteric liquid crystal in the 3rd color sub-pixels region apply voltage, and are reduced fast by voltage, make the cholesteric liquid crystal in described 3rd color sub-pixels region can reflect the 3rd color of light;
The two ends of the described microcapsules in the first color sub-pixels region apply the opposite polarity voltage with described first colored particle, make described first colored particle near described Electronic Paper display upper substrate;
Apply the opposite polarity voltage with described second colored particle at the two ends of the described microcapsules of the subpixel area of the second color, make described second colored particle near described Electronic Paper display upper substrate.
6. display drive method as claimed in claim 5, it is characterized in that, the two ends of the described described cholesteric liquid crystal in the 3rd color sub-pixels region apply voltage, and voltage is reduced fast comprise: voltage is reduced to zero fast, make the cholesteric liquid crystal in described 3rd color sub-pixels region be in P state, the 3rd color of light can be reflected completely;
Described first colored particle is comprised: make described first colored particle be positioned at described Electronic Paper display upper substrate near described Electronic Paper display upper substrate;
Described second colored particle is comprised: make described second colored particle be positioned at described Electronic Paper display upper substrate near described Electronic Paper display upper substrate.
7. a display drive method for display panel described in any one of Claims 1-4, is characterized in that, comprising:
The two ends of the described cholesteric liquid crystal in the first color sub-pixels region apply voltage, make the cholesteric liquid crystal in described first color sub-pixels region be in clear state;
The two ends of the described cholesteric liquid crystal in the second color sub-pixels region apply voltage, make the cholesteric liquid crystal in described second color sub-pixels region be in clear state;
The two ends of the described cholesteric liquid crystal in the 3rd color sub-pixels region apply voltage, and voltage is slowly reduced to zero;
Apply the first voltage at the two ends of the described microcapsules in the first color sub-pixels region and the second color sub-pixels region, make described first colored particle and the second colored particle gather described Electronic Paper display upper substrate and Electronic Paper display infrabasal plate respectively;
The two ends of the described microcapsules in the first color sub-pixels region and the second color sub-pixels region apply opposite polarity second voltage with described first voltage, make described first colored particle and the second colored particle move to precalculated position, absorb whole incident light to enable described black base fluid.
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| CN103576405A (en) * | 2012-08-09 | 2014-02-12 | 余志刚 | Display device adopting electronic ink paper together with liquid crystal display |
| CN105717691A (en) * | 2016-05-06 | 2016-06-29 | 京东方科技集团股份有限公司 | Display component, display device and control method thereof |
| CN106155447A (en) * | 2016-07-14 | 2016-11-23 | 深圳市唯酷光电有限公司 | Capacitance plate and liquid crystal handwriting device |
| WO2018032663A1 (en) * | 2016-08-15 | 2018-02-22 | 大连东方科脉电子股份有限公司 | Grayscale color electronic paper |
| CN106054426A (en) * | 2016-08-15 | 2016-10-26 | 大连东方科脉电子股份有限公司 | Grayscale electronics-paper |
| CN106054304A (en) * | 2016-08-19 | 2016-10-26 | 京东方科技集团股份有限公司 | Polarizing plate, manufacturing method thereof and corresponding device |
| CN108072987A (en) * | 2016-11-14 | 2018-05-25 | 江苏和成显示科技有限公司 | A kind of microcapsules liquid crystal display device |
| CN108072986A (en) * | 2016-11-14 | 2018-05-25 | 江苏和成显示科技有限公司 | A kind of microcapsules liquid crystal display device |
| CN108037625B (en) * | 2018-01-31 | 2023-08-15 | 浙江东方科脉电子股份有限公司 | Color electronic paper display device with three-layer superposition structure |
| CN110322844A (en) * | 2019-07-10 | 2019-10-11 | 京东方科技集团股份有限公司 | A kind of electrophoretic display apparatus and its display methods for realizing more grayscale colours |
| CN113450731B (en) * | 2021-07-29 | 2023-05-23 | 浙江富涌电子科技有限公司 | Gbrwk mixed color electronic paper display device and display method thereof |
| CN113671741B (en) * | 2021-08-20 | 2022-07-22 | 北京理工大学 | Electronic paper and liquid crystal switching display device and method |
| CN114028726B (en) * | 2021-11-09 | 2024-03-08 | 固安翌光科技有限公司 | Light-emitting device and wearable phototherapy instrument |
| CN114141205B (en) * | 2021-12-09 | 2023-04-07 | 中山大学 | Display driving method based on liquid crystal composite electronic ink system and electrophoretic display |
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