CN108681180B - Color photoelectric display device - Google Patents
Color photoelectric display device Download PDFInfo
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- CN108681180B CN108681180B CN201810831011.2A CN201810831011A CN108681180B CN 108681180 B CN108681180 B CN 108681180B CN 201810831011 A CN201810831011 A CN 201810831011A CN 108681180 B CN108681180 B CN 108681180B
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Classifications
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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
-
- 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
- G02F1/1675—Constructional details
- G02F2001/1678—Constructional details characterised by the composition or particle type
Abstract
The application discloses a color photoelectric display device, which comprises an upper glass substrate and a lower glass substrate which are oppositely arranged, and further comprises: a non-polar liquid pixel filled between the upper substrate and the lower substrate, wherein the non-polar liquid pixel further comprises pigment particles with charges on the surfaces; the device also comprises a power supply assembly, electrodes are arranged on the surfaces of the upper glass substrate and the lower glass substrate, and the electrodes, the upper glass substrate and the lower glass substrate are respectively connected with the power supply assembly. The application combines the dual functions of new particles, a suspension system, electrophoresis and electroosmosis flow to prepare the full-color display with high response speed, high contrast, stable imaging and high brightness. The application provides a display principle based on electrodynamics, combines electrophoresis and electroosmotic flow, can solve the display performance bottleneck of the existing electronic paper of color and video, widens the application range of the electronic paper display technology, and has wide application market and huge industrial influence.
Description
Technical Field
The application relates to the field of display, in particular to a color photoelectric display device.
Background
At present, electronic paper is increasingly widely applied to the fields of outdoor wearable equipment, guide marks and the like, and the existing display technologies such as LCD, OLED and the like have higher energy consumption, so that the display market demands cannot be met. The current generation of electrophoresis electronic paper display market is mainly occupied by E-ink, but the product has the defect that video and color display are difficult to realize.
Therefore, there is a need for improvements in this technology.
Disclosure of Invention
The present application aims to solve at least one of the technical problems in the related art to some extent. To this end, it is an object of the present application to provide a color electro-optical display device.
The technical scheme adopted by the application is as follows:
the application provides a color photoelectric display device, which comprises an upper glass substrate and a lower glass substrate which are oppositely arranged, and further comprises: a non-polar liquid pixel filled between the upper substrate and the lower substrate, wherein the non-polar liquid pixel further comprises pigment particles with charges on the surfaces; the device also comprises a power supply assembly, electrodes are arranged on the surfaces of the upper glass substrate and the lower glass substrate, and the electrodes, the upper glass substrate and the lower glass substrate are respectively connected with the power supply assembly.
As an improvement of this technical solution, the device further comprises a charge control agent and counter charge ions, both of which are located in the non-polar liquid pixel.
As an improvement of this technical solution, the device further comprises a surfactant, the surfactant being located in the non-polar liquid pixel.
Further, the power supply assembly comprises an alternating current power supply with adjustable voltage and a switch connected with the alternating current power supply.
Further, the colors of the pigment particles having charges on the surfaces thereof include red, green and blue.
The beneficial effects of the application are as follows:
the application provides a color photoelectric display device, which designs a novel color and video display electronic paper material and a device by providing a novel display principle based on electrodynamics and combining electrophoresis and electroosmosis phenomena in anhydrous nonpolar fluid. The application combines the dual functions of new particles, a suspension system, electrophoresis and electroosmosis flow to prepare the full-color display with high response speed, high contrast, stable imaging and high brightness. The application provides a display principle based on electrodynamics, combines electrophoresis and electroosmotic flow, can solve the display performance bottleneck of the existing electronic paper of color and video, widens the application range of the electronic paper display technology, and has wide application market and huge industrial influence.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the present application;
fig. 2 is a schematic diagram of another embodiment of the present application.
Detailed Description
It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other.
Referring to fig. 1-2, the present application provides a color electro-optical display device, including an upper glass substrate and a lower glass substrate disposed opposite to each other, further including: a non-polar liquid pixel filled between the upper substrate and the lower substrate, wherein the non-polar liquid pixel further comprises pigment particles with charges on the surfaces; the device also comprises a power supply assembly, electrodes are arranged on the surfaces of the upper glass substrate and the lower glass substrate, and the electrodes, the upper glass substrate and the lower glass substrate are respectively connected with the power supply assembly.
As an improvement of this technical solution, the device further comprises a charge control agent and counter charge ions, both of which are located in the non-polar liquid pixel.
As an improvement of this technical solution, the device further comprises a surfactant, the surfactant being located in the non-polar liquid pixel.
Further, the power supply assembly comprises an alternating current power supply with adjustable voltage and a switch connected with the alternating current power supply.
Further, the colors of the pigment particles having charges on the surfaces thereof include red, green and blue.
Preferably, the application provides a color photoelectric display material and device based on nanoparticle suspension, which comprises a power supply component, an upper glass substrate and a lower glass substrate which are opposite to each other, wherein a regulating area is formed between the upper glass substrate and the lower glass substrate, pixels filled with aqueous liquid are filled in the regulating area, pigment particles (such as red, green and blue) with charges on the surfaces are arranged in the regulating area, a charge control agent and a counter charge ion mixture are formed in the regulating area, electrodes are arranged on the surfaces of the upper glass substrate and the lower glass substrate, and the electrodes and the upper glass substrate and the lower glass substrate are respectively connected with two poles of the power supply component. Wherein, a plurality of electrodes are uniformly distributed on the upper surfaces of the upper glass substrate and the lower glass substrate. The power supply assembly includes an ac power source with adjustable voltage and a switch. The power supply assembly comprises an alternating current power supply and a voltage controller connected in series with the alternating current power supply. The switching state of the pixel can be determined by applying a time dependent voltage within the pixel through the integrated electrode structure.
Electrophoresis and electroosmosis are studied in non-aqueous/non-polar systems, enabling the preparation of novel particles and suspensions and the application of this novel system to displays.
Nanoparticles with a certain size range and charge quantity control the orderly movement of the nanoparticles in the solution under the action of electroosmosis and electrophoresis, and form a suspension liquid with certain conductivity with the target solution.
The use of solvents, surfactants, charge control agents, counter-charge ions, and the like can be controlled to achieve particle movement control and dispersion stability. Electrophoresis acting on pigment particles with charges on the surface and electroosmosis acting on the liquid and causing a continuous flow, and visualization of the liquid flow is achieved by adding fluorescent fluid tracer particles.
The scheme is based on an electrodynamic system, combines the dual effects of electrophoresis and electroosmosis flow, and prepares the full-color display with high response speed, high contrast, stable imaging and high brightness.
Currently, electrophoresis and electroosmosis are mainly applied in aqueous polar solutions, where the main charging mechanism between the solid/liquid interface is well known. In polar solvents, the electrolyte in solution (e.g., naCl) spontaneously hydrolyzes to form ions, which is a necessary condition for the formation of electroosmosis. For medium or weak polar solvents, the hydrolysis of the electrolyte only occurs partially or not at all, which results in a much lower liquid surface charge than in polar systems, sometimes up to several orders of magnitude, but in this case the capacitance of the electric double layer is relatively low, so electroosmosis is still achievable. In addition, other measures such as coating the wall with a hydrophobic layer may improve the local electric field characteristics to achieve electroosmosis. Much less research into these effects in non-aqueous, non-polar solvents than in aqueous, polar solvents, electroosmosis has been used as a fluid pumping mechanism in microfluidic devices, electrophoresis has been applied to realize displays, particularly electronic readers, with fluid pixels containing (colored) charged particles that are driven to become visible or invisible.
Electrophoresis is the directional movement of charged particles caused by an applied electric field, an effect which is mainly used to transport charged particles within a liquid, which is only active when the conductivity of the liquid is relatively low, which means that ions are present in small amounts, which otherwise would accumulate around the charged particles and neutralize their charge, a phenomenon known as electro-screening.
Electroosmosis is the movement of a liquid relative to a stationary charged surface (e.g. a microchannel) caused by an electric field, the effect being that when the liquid is in contact with a solid, the solid surface is often charged by dissociation of surface groups or selective adsorption of certain ions in solution, and due to the requirement of electroneutrality, there must be unwanted charged ions in the liquid near the charged surface, equal in number to but opposite in sign to the solid surface charge, which form a so-called Electric Double Layer (EDL) with the charged surface of the solid. The characteristic thickness of the electric double layer is the so-called debye screening length λd of the ionic solution. The counter-charged ions in the EDL liquid phase can be moved by applying an electric field parallel to the walls, the moving ions dragging a large amount of liquid motion in the direction of the electric field.
In the present application, electrophoresis and electroosmosis are studied in a non-aqueous/non-polar system, and from both theoretical and experimental aspects, novel particles and suspensions are studied and prepared, and this novel system is applied to displays. Fig. 1 shows that in the case where the upper and lower electrode plates are simultaneously provided with conductive electrodes, when no power is applied, light enters the device, the color of suspended particles is reflected, and in the case where an electric field is present, as shown in fig. 2, the suspended particles are collected at one side of the device under the action of the electric field, so that the color of the electrode itself is reflected after the incident light is incident, and different colors can be displayed.
The design flow of the scheme is as follows:
silicon-coated organic pigments were chosen for full color displays, while for particle fluorescent labeling, for experimental investigation.
A display device model was built to study the liquid velocity, the velocity of particles relative to the liquid, the repulsive range of particles, the particle diffusion (brownian motion), etc. under an electric field by simulation.
Microfluidic cells with electrode structures were designed and fabricated for systematic study of driving voltages for electrokinetic behavior.
The rheological behaviour of the fluid is characterized, as well as the effect of the properties of the particles (size, charge, shape).
The design of the electrodes and display pixel structures in the appropriate dimensions, the overall structure of the application device ensures that sufficient voltage is provided to drive the movement of the liquid and nanoparticles.
Through simulation and experimental study, key parameters of the display device are optimized.
The shape, charge and size of the particles regulated by the system will and study their effect on the hydrodynamic behaviour.
The effect of the nature and concentration of the different ions on the viscosity of the liquid, potential clustering of particles and electrodynamic behaviour was investigated.
Color particles (red, green, and blue) suitable for color display are synthesized.
The surface chemical characteristics in the device are researched, and the display performance of the device is improved by changing the design of the electrode structure, the component proportion of the solution, the charge quantity of the nano particles and the like.
Electroosmosis and electrophoresis behavior of microfluidic cells is characterized as a function of systematic variations in parameters such as particle size, shape and charge, fluid properties, electrode design, driving voltage, and surface chemistry, summarizing the electrodynamic mechanism.
Adding alternating voltage into an upper glass substrate and a lower glass substrate which are electrified, wherein the voltage is required to drive liquid and nano particles, and the electrified particles move along the direction of an electric field under the action of the voltage;
2. the charged particles are fluid tracer particles marked by fluorescence, so that the visualization of liquid flow can be realized;
3. when light rays are emitted into the device and are emitted onto the visualized particles, the colors of the particles can be reflected; when the color-changing type color screen sample machine is applied to the electrode plate, the color of the electrode plate can be reflected, and the specific position of particles can be adjusted according to specific requirements, so that the color screen sample machine is told;
4. the display consists of pixels filled with a non-aqueous liquid, the main components of which are pigment particles with a surface charge, charge control agents and counter-charge ions. By applying a time dependent voltage within the pixel through the integrated electrode structure, two synergistic effects can determine the state (on or off) of the pixel: electrophoresis which acts on pigment particles whose surfaces are charged and electroosmosis which acts on the liquid and causes continuous flow. Thus, compared to current electrophoretic electronic readers, the faster electroosmosis principle is used to move pigment particles to a relatively large pixel area, while the slower electrophoresis principle is only used to fix the particles in place when the target location is reached.
In particular, an electro-dynamic display has the potential to provide a full color display by using three primary color layers, while maintaining good brightness (reflectivity) by having the advantage of a large single layer transmittance.
The scheme firstly proposes to realize the electrodynamic effect in the nonpolar anhydrous fluid material and explain the mechanism thereof, thereby effectively controlling the movement of the particles. The novel color and video display electronic paper material and device are designed by combining electrophoresis and electroosmotic flow phenomena in the anhydrous nonpolar fluid. The application combines the dual functions of new particles, a suspension system, electrophoresis and electroosmosis flow to prepare the full-color display with high response speed, high contrast, stable imaging and high brightness. The application provides a display principle based on electrodynamics, combines electrophoresis and electroosmotic flow, can solve the display performance bottleneck of the existing electronic paper of color and video, widens the application range of the electronic paper display technology, and has wide application market and huge industrial influence.
While the preferred embodiment of the present application has been described in detail, the present application is not limited to the embodiments, and those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present application, and the equivalent modifications or substitutions are included in the scope of the present application as defined in the appended claims.
Claims (1)
1. A color electro-optical display device, comprising an upper glass substrate and a lower glass substrate which are oppositely arranged, and the color electro-optical display device is characterized by further comprising: a non-polar anhydrous liquid pixel filled between the upper glass substrate and the lower glass substrate, wherein the pixel further comprises pigment particles with charges on the surface; the device also comprises a power supply component, electrodes are arranged on the surfaces of the upper glass substrate and the lower glass substrate, and the electrodes, the upper glass substrate and the lower glass substrate are respectively connected with the power supply component; the device also includes a charge control agent and counter charge ions, both in the non-polar anhydrous liquid pixel; the device further includes a surfactant located in the non-polar anhydrous liquid pixel; the power supply assembly comprises an alternating current power supply with adjustable voltage and a switch connected with the alternating current power supply; the colors of the pigment particles with charges on the surfaces comprise red, green and blue;
when the power is not applied, the light enters the device and the color of the pigment particles is reflected;
in the presence of an electric field, the pigment particles collect on one side of the device, light entering the device, and the color of the electrode is reflected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810831011.2A CN108681180B (en) | 2018-07-26 | 2018-07-26 | Color photoelectric display device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810831011.2A CN108681180B (en) | 2018-07-26 | 2018-07-26 | Color photoelectric display device |
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| Publication Number | Publication Date |
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| CN108681180A CN108681180A (en) | 2018-10-19 |
| CN108681180B true CN108681180B (en) | 2023-11-24 |
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| CN201810831011.2A Active CN108681180B (en) | 2018-07-26 | 2018-07-26 | Color photoelectric display device |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004054029A (en) * | 2002-07-22 | 2004-02-19 | Sharp Corp | Display device and its manufacturing method |
| CN107193170A (en) * | 2017-07-19 | 2017-09-22 | 昆山龙腾光电有限公司 | Display device and color display method |
| CN208569268U (en) * | 2018-07-26 | 2019-03-01 | 华南师范大学 | A kind of color photoelectric display device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9013780B2 (en) * | 2010-04-21 | 2015-04-21 | Alexander Victor Henzen | Electrophoretic displays |
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- 2018-07-26 CN CN201810831011.2A patent/CN108681180B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004054029A (en) * | 2002-07-22 | 2004-02-19 | Sharp Corp | Display device and its manufacturing method |
| CN107193170A (en) * | 2017-07-19 | 2017-09-22 | 昆山龙腾光电有限公司 | Display device and color display method |
| CN208569268U (en) * | 2018-07-26 | 2019-03-01 | 华南师范大学 | A kind of color photoelectric display device |
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