191 results about "Electrowetting" patented technology

The invention relates to the technical field of display, in particular to an array substrate and an electrowetting display panel, the array substrate comprises a first substrate, a driving layer, a pixel definition layer and an insulating layer with hydrophobicity, and the driving layer comprises a driving electrode; the pixel definition layer is provided with pixel openings corresponding to the driving electrodes; the insulating layer comprises a plurality of microstructures, each microstructure comprises a first sub-part and a second sub-part located on the side, close to the first substrate, of the first sub-part, and the first sub-parts support the polar fluid in the pixel openings. The adjacent second sub-parts are connected, the gaps are formed between the adjacent first sub-parts, the top end gaps between the adjacent first sub-parts are the target gaps, and the target gaps are configured to be spaced from the second sub-parts when the polar fluid is supported on the first sub-parts, so that the problem that the polar fluid is in contact with the second sub-parts can be solved; therefore, the driving voltage can be reduced, and the driving speed of the polar fluid can be improved.

The invention provides a display unit and display equipment. The display unit includes: a first substrate; the second substrate is arranged opposite to the first substrate; the pixel wall is arranged between the first substrate and the second substrate, and a closed cavity is defined by the pixel wall, the first substrate and the second substrate; the light control board comprises at least two blades, and the at least two blades are rotationally connected into the closed cavity; a reflecting layer or a light absorbing layer with a preset color is arranged on the surface of each blade; two of the at least two blades have opposite electrical properties or opposite magnetic properties; and the driving electrodes are at least arranged on two of the first substrate, the second substrate and the pixel wall along the rotating direction of the blade, and are used for driving the light control plate to rotate to a corresponding angle position so as to display corresponding brightness. According to the display unit, the problems that black spots appear when electrowetting displays white, ink is split during shrinkage and microcapsules are coagulated can be solved, and the response rate is increased.

Provided is an electrowetting-on-dielectric (EWOD) device. The EWOD device comprises a first substrate and a second substrate opposite to the first substrate. The first substrate comprises a. plurality of first electrodes configured to be respectively controllably connected to signal lines. The first hydrophobic layer disposed over the plurality of first electrodes. The second substrate comprises a second electrode configured to be connected to the signal lines. The second hydrophobic layer disposed over the second electrode. An internal space between the first substrate and the second substrate is provided for receiving a droplet and a surrounding medium. The droplet is surrounded by the surrounding medium.

The invention provides an electrowetting electronic paper low power consumption method based on ambient light dynamic compensation, which comprises the following steps: dividing ambient light intensity intervals, and setting the lowest ambient light intensity of each interval as the standard ambient light of the interval; according to the ambient light intensity collected in real time and a pre-stored voltage-reflection brightness curve, by optimizing the reflection brightness difference of adjacent gray levels and constraining gray level transition smoothness, generating a gray level-brightness mapping relation corresponding to the standard ambient light; converting the gray value of the input image based on the mapping relation, segmenting the image into a bright part and a dark part by setting quantiles, processing the dark part and enhancing the detail area of the image; based on the highest gray value of the converted image and the relation between the PAM driving mode voltage and the gray level, the maximum driving voltage value is dynamically determined, and the maximum driving voltage is reduced along with the enhancement of the ambient light.

The present invention relates to an apparatus for droplet manipulation, the apparatus comprising: a drive module configured to receive control signals and operate an electrowetting-on-dielectric (EWOD) chip configured to manipulate droplets; a droplet detection system having a light source and a lens-free imaging device configured to obtain at least one image including a droplet on the electrowetting-on-dielectric chip; and a control unit configured to receive at least one image from the droplet detection system and send control signals to the drive module. The control unit is further configured to adjust at least one of the control signals as a function of the at least one image. The present invention also relates to a system comprising the apparatus and an electrowetting-on-dielectric chip configured to receive signals from the drive module.

The invention discloses an experiment-numerical value-machine learning fusion-based in-oil liquid drop electric field dynamics modeling and regulation method, which comprises the following steps of: firstly, constructing a high-voltage electric field liquid drop experiment system, and testing oil liquid drop experiment data in oil; then establishing a multi-physics field coupling model, and describing deformation and flow field evolution of oil drops in oil under a strong electric field; and finally, constructing a BP neural network and optimizing an initial weight and a threshold value to realize rapid prediction of the deformation behavior of the oil drops in the oil under the action of the electric field. According to the method, an experimental characterization-numerical solution-machine learning optimization three-layer collaborative system is constructed, a whole-process closed loop from physical property determination, equation solution to algorithm prediction is realized, and droplet deformation, charge distribution and interface response are rapidly predicted under the conditions of different electric field intensities, temperatures and emulsifier concentrations; and active control of electric field behaviors can be realized through parameter reverse adjustment, and reliable modeling and optimization basis is provided for an electrowetting chip, a flexible EHD pump and a microfluidic liquid drop regulation and control system.

The invention discloses an electrowetting display panel and an electrowetting display device, and relates to the technical field of display, the electrowetting display panel comprises a first substrate, a second substrate, an electrode layer, a first insulating layer and a second insulating layer, the first substrate is provided with a plurality of pixel units, each pixel unit has a first direction and a second direction which are perpendicular to each other, and the second substrate is provided with a plurality of second insulating layers; the pixel unit comprises a plurality of sub-pixel units, and each sub-pixel unit extends in the first direction; the electrode layer is arranged on the surface of the first substrate; the first insulating layer is arranged on the surface of the electrode layer; the second insulating layer is arranged on the surface of the second substrate, the second insulating layer and the first insulating layer define a plurality of containing cavities, each containing cavity comprises a containing bin and a sub-pixel flow channel which are communicated, the sub-pixel flow channels are arranged corresponding to the sub-pixel units, the containing bins are filled with liquid, the sub-pixel flow channels are fully paved with the liquid when the electrode layer is not powered on, and the sub-pixel flow channels are communicated with the containing bins. And when the electrode layer is electrified, the electrode layer is accommodated in the accommodating bin. According to the technical scheme, the foldable display effect can be achieved.

Layered dielectric materials for use in controlling dielectric strength in microelectronic devices, especially as they relate to electrophoretic and electrowetting applications. Specifically, a combination of a first atomic layer deposition (ALD) step, a sputtering step, and a second ALD step result in a layer that is chemically robust and nearly pinhole free. The dielectric layer may be disposed on the transparent common electrode of an electrophoretic display or covering the pixelated backplane electrodes, or both.

An apparatus for forming a plurality of microdroplets from a droplet includes a substrate, a dielectric layer on the substrate and having a plurality of hydrophilic surface regions spaced apart from each other by a hydrophobic surface, and a plurality of electrodes in the dielectric layer. The electrodes are configured to form an electric field (E) across the droplet in response to a voltage provided by a control circuit to move the droplet across the dielectric layer in a lateral direction (F) while leaving portions of the droplet on the hydrophilic surface regions to form a plurality of microdroplets on the hydrophilic surface regions.

The embodiment of the invention provides a display control method of double-layer ink electrowetting electronic paper and related equipment. The method comprises the following steps: acquiring a target three-primary-color matrix; identifying a minimum color component value, and determining a gray base value according to the minimum color component value; calculating a first color component difference value according to the color component value of the second color channel and the gray base value, and calculating a second color component difference value according to the color component value of the third color channel and the gray base value; calculating the ink aperture opening ratio of the first double-layer ink sub-pixel unit according to the gray base value and the preset color component value; calculating the ink aperture ratio of the second double-layer ink sub-pixel unit according to the first color component difference value and a preset color component value, and calculating the ink aperture ratio of the third double-layer ink sub-pixel unit according to the second color component difference value and the preset color component value; and performing display control on the electrowetting electronic paper based on the ink aperture opening ratio. According to the embodiment of the invention, the color accuracy displayed by the electrowetting electronic paper can be improved.

The invention discloses a high-water-content material conveying system and method based on bionic and active separation, and belongs to the technical field of bulk material conveying. A self-adaptive super-smooth interface is constructed through a gradient porous ceramic matrix and electrowetting regulation and control, and the surface characteristics are dynamically regulated and controlled through voltage, so that the self-adaptive super-smooth interface adapts to the adhesion characteristics of different materials; water-solid efficient separation is achieved by combining ultrasonic cavitation and a centrifugal force field, through the active phase separation mechanism of first dissociation and then separation, the traditional mode of single mechanical extrusion or gravity drainage is changed, and the water-solid separation efficiency is improved to 95% from 70% or below; and magnetic suspension driving and piezoelectric energy harvesting are adopted, so that energy consumption is reduced. The system can achieve the breakthrough effects that adhesion tends to zero, separated water is directly recycled, and the power consumption per ton is smaller than 1 kWh, and is suitable for green conveying of industrial sludge, tailings and other scenes.

The embodiment of the invention provides an electrowetting display device. The electrowetting display device comprises an upper cover plate, a lower cover plate and a fluid chamber arranged between the upper cover plate and the lower cover plate. A first space is defined in the fluid cavity through a plurality of pixel walls, the pixel walls are arranged on the side face, close to the lower cover plate, of the fluid cavity, the space, except for the first space, in the fluid cavity is a second space, oily fluid is contained in the first space, and water-based fluid is contained in the second space; the upper cover plate comprises an upper cover plate electrode and a fluorine-containing upper hydrophobic dielectric layer which are sequentially arranged from top to bottom; the lower cover plate comprises a fluorine-containing lower hydrophobic dielectric layer and a lower cover plate electrode which are sequentially arranged from top to bottom; and an alternating current driving power supply is connected between the upper cover plate electrode and the lower cover plate electrode. According to the embodiment of the invention, the condition that the polarity of the aperture ratio of the electrowetting display device is asymmetric during alternating current driving can be improved, and the problem of flicker caused by the asymmetric phenomenon is solved.

The invention discloses a split-screen synchronous display method for electrophoresis electronic paper and electrowetting electronic paper. The method comprises the following steps: S1, receiving a video stream output by an external video source; s2, converting the video stream into a parallel RGB (Red, Green, Blue) data stream; s3, performing inter-frame difference calculation on the parallel RGB data stream to generate a frame difference data stream; s4, asynchronously caching the frame difference data stream to adapt to the difference between the output frame rate of the external video source and the refresh rate of the electronic paper display equipment; s5, based on the asynchronously cached frame difference data flow, respectively generating driving signals suitable for the electrophoresis electronic paper and the electrowetting electronic paper; and S6, respectively outputting the driving signals to the electrophoresis electronic paper display equipment and the electrowetting electronic paper display equipment so as to realize synchronous split-screen display. According to the invention, multiple problems in real-time dynamic display of the existing electronic paper are solved.

A spectral domain optical coherence tomography (OCT) system utilizes an electrowetting prism having four isolated electrodes and configured to deflect a light beam according to an actuating control signal applied to the electrodes. The control signal causes the light beam to laterally scan over a sample. The light beam is produced by a broad bandwidth laser and light from the sample and a reference path is provided to a spectrometer for analysis. The light source may be an all-normal-dispersion fiber laser seeding a gain-managed nonlinear fiber amplifier. The electrowetting prism is capable of scanning up to ±6°. The system is low power and operates at kHz speed.

The present invention relates to a method for preparing a structurally discontinuous air self-priming electrode with surface microcracks that resist electrowetting. A carbon black-polytetrafluoroethylene film prepared by coating forms a large number of irregular microcracks during the calcination process, thereby causing structural discontinuity. This structurally discontinuous air self-priming electrode can effectively avoid the electrowetting effect and the resulting electrolyte flooding during electrocatalytic service, maintain stable local water resistance and air self-diffusion channels, and achieve efficient and long-lasting electrochemical synthesis of H2O2. Due to the steric effect, the discontinuity of the electrode structure prevents electric field lines from reaching, resulting in a local low electric field region at the crack. This achieves the electrode's anti-electrowetting ability during long-cycle electrolysis, achieves stable hydrophobicity and rapid oxygen transmission channels under the electric field, and greatly improves the yield, current efficiency, and long-term stability of H2O2 electrosynthesis in air.

Disclosed is a display panel (20, 50) arranged on a body of a motor vehicle in place of a radiator grill, comprising: - a first electrowetting layer (503) containing a liquid, the liquid being coloured in a first colour chosen from among cyan, magenta and yellow, - a second electrowetting layer (507) containing a liquid, the liquid being coloured in a second colour chosen from cyan, magenta and yellow, - a third electrowetting layer (511) containing a coloured liquid in a third colour chosen from cyan, magenta and yellow, the first (503), second (507) and third (511) electrowetting layers being superposed on one another, above the body (11) of the motor vehicle.

This invention provides a liquid metal alloy composite phase change material and a resettable thermal fuse, relating to the field of circuit protection device technology. The material is composed of a liquid metal alloy, micro-phase change material capsules, and elastomer molecular chains. The capsules exhibit phase change characteristics, expanding at a preset operating temperature and contracting at a reset temperature. This material can be used in thermal fuses, filled with a microfluidic matrix and integrated with electrowetting electrode pairs. When the temperature exceeds the limit, the capsules expand, driving the liquid metal to flow and disconnect the circuit. When the temperature drops below the reset temperature, voltage is applied through the electrowetting electrodes to reduce interfacial tension, driving the liquid metal to flow back and achieve active reset. This invention combines phase change driving with electrowetting control, realizing programmable protection, status self-diagnosis, and remote communication, and has the advantages of high operating accuracy, rapid reset, and long cycle life.

This invention discloses a method and system for detecting the strongest Rayleigh acoustic current in immobilized microdroplets. Specifically, it involves: calculating the acoustic current suppression coefficient through experimental quantitative testing to establish a quantitative mapping relationship between acoustic current intensity and droplet contact angle; utilizing an electrowetting structure composed of interdigitated electrodes, a dielectric layer, and a hydrophobic layer to actively regulate the droplet contact angle through an applied voltage; and dynamically adjusting the applied voltage in real time by monitoring the droplet vibration amplitude, particle velocity, and contact angle through a collaborative control program to maintain the acoustic current intensity at its strongest. This invention also provides a detection system for implementing the above method, including an indium tin oxide transparent interdigitated electrode substrate, a lead zirconate titanate piezoelectric transducer, a laser Doppler vibrometer, a microscope, and a collaborative control module. This invention can maximize and dynamically maintain the Rayleigh acoustic current intensity in immobilized microdroplets, significantly accelerating the solid-liquid interface mass transfer process, and is applicable to biochemical analysis fields such as rapid immunoassay and biological particle mixing.

A chip 10 comprising a microfluidic space 12 accommodating a plurality of micro-entities in a substantially planar array and a dispense region 16 configured to provide a flow of carrier fluid non-parallel to an exit orifice 14, wherein the microfluidic space has the height of a single layer of micro-entities and contains a carrier fluid in which the micro-entities are manipulated using a force. The exit orifice 14 may be double or five times the height of the microfluidic space and may comprise a single gap, a series of gaps, a sieve or a semi-permeable membrane. The carrier fluid may be provided at less than 70, or 60-70 degrees to the orifice. The chip may comprise carrier fluid inlets 26, optionally symmetrically positioned either side of an outlet 24. A cavity in the dispense region may have a depth of 100-200 µm. The micro-entities may be a cell, part of a cell, a bead, an organelle, an organism, a liposome, a biosynthetic structure or a vesicle, and may be localised in a sequestration pen. One or more micro-entities may be encapsulated in at least a subset of the microdroplets 18. The force may be electrowetting, EWOD or oEWOD.

The embodiment of the invention provides a gray scale driving method and device of an electrowetting display, equipment and a storage medium, and the method comprises the steps: applying a first driving voltage based on a first driving signal, inhibiting the splitting of printing ink in a first driving time through the first driving voltage, and improving the response speed of the printing ink; second driving voltage is applied within second driving time based on the second driving signal, and the second driving voltage is larger than the first driving voltage; and applying a third driving voltage based on a third driving signal according to the brightness value, adjusting the low-frequency alternating current driving signal to realize precise regulation and control of 16-level target gray scales, and performing linear fitting on low-frequency alternating current square wave voltage amplitudes under different gray scales. According to the embodiment of the invention, the electrowetting driving signal can perform gray scale conversion by controlling the movement of the ink, so that the ink response speed and the aperture opening ratio are improved, the screen flicker phenomenon is reduced, and meanwhile, the accurate control of the gray scale is realized.

This invention proposes a zoom microprojector based on metasurface holography, comprising a laser, a transmissive metasurface, and an electrowetting liquid lens. To achieve system miniaturization, the transmissive metasurface and the electrowetting liquid lens are integrated into a single cavity, with the electrowetting liquid lens located behind the transmissive metasurface. During the metasurface fabrication process, a 3D Fourier transform algorithm is proposed to generate a 3D metasurface hologram, thereby fabricating the transmissive metasurface. The liquid lens is a small-aperture liquid lens designed based on the electrowetting principle to cooperate with the transmissive metasurface to achieve zoom microprojection. When the laser emitted from the laser illuminates the transmissive metasurface, the 3D image diffracted by the metasurface passes through the electrowetting liquid lens. The position and size of the 3D image can be adjusted according to the voltage of the liquid lens, thus achieving a 3D zoom projection effect.

An electrowetting system for actuating droplets of a first composition and of a second composition. The system includes: a plurality of electrodes configured to manipulate droplets of fluid in a microfluidic space, each electrode being coupled to circuitry which applies driving voltages to the electrode; and a processing unit operably connected to a look up table correlating drive sequences to chemical species and at least one composition parameter. The pulse sequence of driving voltages to move at least one of the droplets contains at least three consecutive positive pulses or is positively biased.

A method of operating a set of electrodes on an on-dielectric electrowetting device is described. The on-dielectric electrowetting device includes: a central electrode (75), a first electrode (77) adjacent to the central electrode, a second electrode (78) adjacent to the central electrode, a third electrode (85) adjacent to the first electrode, the third electrode having an area larger than the central electrode, and a fourth electrode (86) adjacent to the second electrode, the fourth electrode having an area larger than the central electrode. The method includes activating the central electrode, the first, second, third, and fourth electrodes to cause a first droplet (41) to remain above the central electrode, the first, second, third, and fourth electrodes, wherein the first droplet is confined above the central electrode. The method also includes deactivating the first and second electrodes to cause the first droplet to divide into second, third, and fourth droplets (42, 43, 3) that are respectively retained above the third, fourth, and central electrodes.

The application discloses a composite digital acoustic flow control chip, a preparation method and a multi-dimensional processing method. The chip comprises detachably connected upper and lower plates and a gap support assembly arranged between the upper and lower plates. The upper plate comprises a piezoelectric substrate, an acoustic surface wave interdigital electrode array arranged on the piezoelectric substrate, a first dielectric layer covering the interdigital electrode array, a conductive layer arranged on the first dielectric layer, and a first hydrophobic layer arranged on the conductive layer. By constructing the multi-dimensional acoustic wave control unit of the upper plate and the electrode array of the lower plate based on the dielectric wetting effect, the programmable and controllable movement of the droplet sample and the action of the acoustic surface wave in the droplet are realized, the digital control of the acoustic flow control technology is realized, and the capacity of the chip for sample enrichment, control, mixing and fixed-point heating is greatly improved through the design of multiple IDTs.

The invention discloses a dielectric hydrophobic film layer and a preparation method and application thereof, the dielectric hydrophobic film layer comprises a substrate, at least one side surface of the substrate contains hydroxyl; the preparation raw materials of the bridging structure comprise an acrylate silane coupling agent, and at least one end part of the acrylate silane coupling agent is chemically connected with the hydroxyl group on the surface of the substrate; the hydrophobic layer is arranged on the surface of the side, away from the substrate, of the bridging structure, and the material of the hydrophobic layer comprises fluorine-containing acrylate. The film layer has excellent dielectric strength and surface hydrophobicity and can replace a traditional laminated structure of a dielectric medium and a hydrophobic layer, chemical surface modification of acrylate silane is carried out on a substrate interface, an upper layer is made of a fluorine-containing acrylate material, the lower layer of the prepared dielectric hydrophobic layer is connected with an inorganic substrate in a covalent bond mode, and the dielectric hydrophobic layer is formed. The breakdown resistance of the interface of the electrowetting device is enhanced; and the exposed fluorine element on the upper layer enables the coating to have good hydrophobic performance.

A device for fluid display comprising a fluid, wherein the fluid is displaced by an electrowetting process. The device is filled with at least 2 immiscible fluids, whereas one fluid is located within the electrical field generated by a reference electrode and a control electrode and partially within the electrical field generated by the same reference electrode and at least one second control electrode so that the electric activation of the second control electrode generates a deformation or movement of the fluid in the direction of the second control electrode. Also provided is a method of switching the control electrodes of the device above-mentioned device in a sequence so that a portion of the fluid is displaced within the device.

The invention discloses an electrowetting-assisted piezoelectric ink-jet printing circuit combination degree enhancing method, which comprises the following steps of: integrating an interdigital electrode array on the back surface of a ceramic substrate, connecting interdigital electrodes in the interdigital electrode array with a controller through silver paste, and checking the pattern integrity of the interdigital electrodes by using an optical microscope; based on a dielectric wetting theory, establishing a quantitative regulation and control relationship between the electric field intensity and the contact angle, and setting electric field parameters; a single factor variable method and an orthogonal experiment method are combined, line width consistency and edge roughness serve as core evaluation indexes, and key printing parameters are optimized; a sintering procedure is determined based on a temperature-stress-conductivity coupling model, a printed sample is placed in a tubular sintering furnace, gradient sintering is carried out in a reducing atmosphere, and elimination of interface stress and strengthening of the binding degree are achieved through the following thermal field strategy of precise temperature control. The bonding strength of the piezoelectric ink-jet printing circuit and the surface of the ceramic substrate is improved.

The application discloses an electrowetting display device structure and a method for preparing the same. The electrowetting display device structure comprises a first substrate, a second substrate, a sealing frame and a pixel wall. The second substrate is arranged in parallel with the first substrate, and has a first conductive layer on one side close to the first substrate. A hydrophobic insulating layer is arranged on the first conductive layer. The sealing frame is arranged between the first substrate and the second substrate, and a sealed cavity is formed between the first substrate, the sealing frame and the second substrate. The sealed cavity is filled with a polar liquid. The pixel wall is arranged on the hydrophobic insulating layer in the sealed cavity, and defines a pixel grid. The pixel grid is filled with a non-polar liquid which is immiscible with the polar liquid. The pixel wall comprises a second conductive layer, and the second conductive layer and the first conductive layer form a positive electrode and a negative electrode, respectively. The electrowetting display device structure can improve the response time and the conductive efficiency of the electrowetting display device.

The present invention discloses a method for driving a dual-layer ink electrowetting electronic paper display, comprising: obtaining the desired display color for each dual-layer ink pixel in the electronic paper display in response to a display signal; obtaining the corresponding upper primary color ink aperture ratio and lower black ink aperture ratio for each dual-layer ink pixel based on the desired display color; determining whether the lower black ink aperture ratio is zero; if so, applying a voltage to a first primary color drive electrode for driving; if not, applying a diffusion potential to the first black drive electrode and a gathering potential to the second black drive electrode to cause the lower black ink to gather above the second black drive electrode; wherein the hydrophobicity of the lower black ink corresponding to the diffusion potential is less than the gathering potential; and then applying voltages to the first primary color drive electrode and the second black drive electrode, respectively, based on the upper primary color ink aperture ratio and the lower black ink aperture ratio. The present invention can improve display effects.

The invention discloses an efficient micro-fluidic system and a micro-fluid distribution method, relates to the technical field of micro-fluidic, and solves the problems that a micro-fluidic chip is single in structure and function and generally does not have an automatic sorting function, so that an application scene is limited, and the development of the micro-fluidic chip is restricted; and a gap is easily generated due to difficulty in alignment between the pipeline and the channel, so that liquid leakage is caused. According to the efficient microfluidic system and the microfluid distribution method, the efficient microfluidic system comprises a control machine body, an electrowetting control machine body is arranged on the control machine body, and a control chip is arranged on the electrowetting control machine body. When an arc-shaped conveying pipe in a first flow dividing disc rotates for the third time, an intermittent gear can drive a first rotating rod on a driving gear to rotate for the first time through a gear part, and then the arc-shaped conveying pipe in the first flow dividing disc can rotate clockwise; therefore, more convenience and high efficiency are achieved.