25 results about "Electrowetting" patented technology

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.

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.

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 relates to a lighting device arranged on a front face or on a rear face of a motor vehicle, the lighting device comprising: - a light source; - a surface transparent to the light emitted by the source; - a transparent display panel arranged on the transparent surface; which transparent display panel comprises: - a first electrowetting layer (503) formed of cells which each contain a droplet of a liquid; - a second electrowetting layer (507) formed of cells which each contain a droplet of a liquid; - a third electrowetting layer (511) formed of cells which each contain a droplet of a liquid; - the first, second and third electrowetting layers being stacked on one another, and each droplet being in an expanded state or in a contracted state, the state being respectively determined by an electrical voltage of the first, second or third electrodes.

The application discloses a temperature-sensitive self-regulating method and device for heating surface wettability. The method comprises the following steps: integrating a temperature-sensitive functional material layer and arranging a patterned microelectrode array on a heating surface, and dividing the heating surface into multiple electrically independent sub-regions; collecting the wall surface temperature and / or liquid film coverage state of each sub-region in real time to form a thermal-wettability state spatial distribution map; identifying high-risk sub-regions based on multi-level threshold value judgment, and applying an electro-wetting excitation voltage to the high-risk sub-regions only; and dynamically adjusting the voltage parameters according to the type of cooling medium and heat load, and automatically stopping the excitation after the wettability state is restored. The device comprises a heat-conducting substrate, a temperature-sensitive functional material layer, a partitioned microelectrode array, a multi-channel programmable power supply, a sensor and a central control unit. The scheme realizes local precise regulation and control, improves the critical heat flux density, significantly reduces the power consumption, and is suitable for chip heat dissipation, nuclear energy and space heat control fields.

A heat dissipating device comprises a vapor chamber (1), with a condenser (5) arranged on a first side of the vapor chamber (1), an evaporator (7) arranged on a second side, and a plurality of electrowetting linear arrays (8) connecting the condenser (5) to the evaporator (7). Each linear array (8) comprises electrodes (9) connected to an electric power supply (10) to create continuous droplet motion. Vapor channels (11) are arranged between the linear arrays (8) to allow vapor flow from the evaporator (7) to the condenser (5). At least one linear array (8) is arranged on both the top surface (2) and bottom surface (3). The device further includes capillary grooves (14) arranged adjacent to at least one of the electrowetting linear arrays (8), spanning from the condenser (5) towards the evaporator (7) at least along a portion of the linear arrays (8).

A circuit substrate includes a control circuit including an input transistor, an output transistor, and an output node, in which in the control circuit, a current corresponding to input to one conduction terminal of the input transistor flows to the output node via the output transistor, and the control circuit includes an inspection circuit element connected to the other conduction terminal of the input transistor and the output node.

An electrowetting optical element having a first electrode layer stack including a substrate and a first electrode layer, a second electrode layer stack including a superstrate and a second electrode layer, a containment space formed between the first and second electrode layer stacks, and one or more cell walls extending between the first and second electrode stacks forming cells. The containment space includes a polar liquid and a non-polar liquid immiscible with each other, wherein the first and second electrode layers are configured to apply a voltage between the electrodes for rearranging the polar liquid relative to the non-polar liquid. The first electrode layer stack includes an insulating layer disposed between the first electrode layer and the containment space, wherein the insulating layer includes a first and a second group of polymers arranged in the insulating layer as an entangled polymeric network.

The present application relates to the technical field of sheet-shaped emitter made of non-metallic material, and provides an electro-wetting-based non-metallic sheet electrostatic spraying device and method thereof, the device comprising a liquid storage tank, a coarse inner diameter capillary, a connector and a sheet-shaped emitter made of non-metallic material. The liquid storage tank is used for storing and providing the liquid to be sprayed; the coarse inner diameter capillary is horizontally arranged and communicates with the liquid storage tank for conveying the liquid; the connector is arranged at the outlet end of the capillary; the emitter is arranged at the outlet end of the capillary and is spaced apart from the capillary, and the emitter is connected with the capillary through the connector. Under the action of an applied electric field, a liquid film is formed on the surface of the emitter, the liquid spreads along the surface of the emitter to the edge and forms a Taylor cone and a conical jet. The electro-wetting film formation on the outer surface of the emitter and the synergistic effect of geometric field strengthening enable the formation of a stable Taylor cone and a conical jet of a high-surface-tension liquid at the edge of the non-metallic emitter, thereby realizing low-voltage spraying and a wide and stable window.

A gallium-based liquid metal electro-driven micropump structure for organ-on-a-chip applications relates to the field of microfluidics. This invention addresses the problem of large size and weight of existing organ-on-a-chip micropumps. The gallium-based liquid metal electro-driven micropump structure of this invention comprises multiple PDMS micropillars arranged in a row in each of the three PDMS micropillar groups. The cross-sectional areas of the PDMS micropillars in the three groups are different, and the three groups are evenly distributed in three rows within the bubble trapping region. A gallium-based liquid metal droplet is located in the liquid pumping region. Two graphite electrodes are located in the inlet channel and the first channel, respectively, and are used for electrical connection to the AC power supply. This invention allows for changing the pumping direction by altering the electric field direction, selectively driving the target fluid using the continuous electrowetting effect of gallium-based liquid metal, and features a simple structure.

The application relates to a stereoscopic display device and an imaging control method thereof, and relates to the technical field of spatial imaging display, and aims to provide a stereoscopic display device capable of expanding a visual angle and reducing visual fatigue. The stereoscopic display device comprises a plurality of pixel units and a light-emitting unit. The pixel unit comprises a pixel cavity, a liquid storage tank, a first electrode and a second electrode. A base liquid is arranged in the pixel cavity and the liquid storage tank, the liquid storage tank is communicated with the pixel cavity, an electrowetting liquid and diffusion particles are arranged in the base liquid, the electrowetting liquid and the base liquid are mutually insoluble, and the diffusion particles are affinity to the electrowetting liquid and repel the base liquid. The first electrode is arranged in the liquid storage tank, and the second electrode is arranged on at least one side of the pixel cavity, the first electrode and the second electrode are configured to control the electrowetting liquid to drive the diffusion particles to switch and move between the pixel cavity and the liquid storage tank. The light-emitting unit is configured to irradiate light rays towards the corresponding pixel cavity, so that the diffusion particles in the pixel cavity scatter the light rays.

Disclosed is a display panel (20, 50), arranged between two light devices (12) of a motor vehicle in place of a radiator grill, the display panel comprising: - a reflective support substrate (515), - a first electrowetting layer (503) formed of cells that each contain a droplet of a liquid, the liquid droplet being coloured in a first colour chosen from cyan, magenta and yellow, - a second electrowetting layer (507) formed of cells that each contain a droplet of a liquid, the droplet of liquid being coloured in a second colour chosen from cyan, magenta and yellow, - a third electrowetting layer (511) formed of cells that each contain a droplet of a liquid, the droplet of liquid being coloured in a third colour chosen from cyan, magenta and yellow, the first (503), second (507) and third (511) electrowetting layers being superimposed on one another.

The invention relates to a method for the optical analysis of a sample in a droplet actuation device operating by electrowetting, said actuation device comprising: A chamber (1) formed by two substrates (100, 101) arranged opposite each other along a principal axis, A first light source (S1) capable of generating said first light beam (L1) directed towards a photoconductive layer (C30) of the lower substrate (101), The upper substrate (100) comprising a second electrode, An optical sample analysis device comprising a second excitation light source (S2) positioned above the upper substrate (100), capable of generating a second light beam (L2) at an excitation wavelength, and a unit for detecting the light emitted by said sample through said upper substrate (100) caused by its excitation. Figure to be published with the abbreviation: Figure 2A

Disclosed is a display panel (20, 50) arranged inside a motor vehicle and comprising: a reflective support substrate (515), a first electrowetting layer (503) formed of cells that each contain a droplet of a liquid, the liquid droplet being coloured in a first colour selected from cyan, magenta and yellow; a second electrowetting layer (507) formed of cells that each contain a droplet of a liquid, the liquid droplet being coloured in a second colour selected from cyan, magenta and yellow; a third electrowetting layer (511) formed of cells that each contain a droplet of a liquid, the liquid droplet being coloured in a third colour selected from cyan, magenta and yellow, wherein the first (503), second (507) and third (511) electrowetting layers are superimposed on each other.

A biosensor is provided. The biosensor includes a plurality of sensor units. Each of the sensor units includes a plurality of photodiodes, a plurality of first electrodes, an electro-wetting chamber, a second electrode, a bottom conductive layer, a photoconductive layer, an open cell chamber, and a top conductive layer. The first electrodes are disposed above the photodiodes. The electro-wetting chamber is disposed above the first electrodes, and a non-polar liquid is disposed in the electro-wetting chamber. The second electrode is disposed on the electro-wetting chamber. The bottom conductive layer is disposed above the second electrode. The photoconductive layer is disposed on the bottom conductive layer. The open cell chamber is disposed on the photoconductive layer and configured to receive a cell. The top conductive layer is disposed on the open cell chamber.

This application discloses an electrowetting surface control system, method, and vehicle, belonging to the field of automotive technology. The system uses a vehicle speed sensor to acquire real-time driving speed; a control module determines a target voltage amplitude based on the real-time driving speed and sends it to a voltage drive module; the voltage drive module applies a voltage corresponding to the target voltage amplitude to a transparent conductive electrode layer; the transparent electrowetting glass panel includes a glass substrate, a transparent conductive electrode layer, a dielectric layer, and a hydrophobic functional layer stacked sequentially, wherein the transparent conductive electrode layer and the dielectric layer form an insulating capacitor structure. When a voltage is applied to the transparent conductive electrode layer, the electrowetting effect of the insulating capacitor structure adjusts the contact angle between the hydrophobic functional layer and water droplets, thereby regulating the wetting state. This application maintains a hydrophobic state to assist drainage during high-speed driving, a hydrophilic state to assist cleaning during low-speed driving, and a moderately hydrophilic state to achieve a balance during medium-speed driving.

This invention discloses a gradient electrowetting coalescence reactor and its method for treating emulsified oily wastewater, belonging to the field of oily wastewater treatment technology. The reactor includes four units: pre-coalescing, electrowetting main reaction, enhanced coalescence, and sedimentation separation, which are sequentially connected in series in a shell along the water flow direction. The pre-coalescing unit uses an oleophobic modified wire mesh and has no electric field. The electrowetting main reaction unit uses a double-electrode wire mesh with a gap of 1-2 mm and applies a high-frequency pulsed electric field of 50-250V and 1-5kHz. The enhanced coalescence unit uses a superhydrophilic modified anode wire mesh and applies a DC electric field of 10-50V. The wire mesh aperture of the three units decreases stepwise along the water flow direction, forming a gradient distribution of 500-1000μm → 100-300μm → 50-100μm. This invention achieves efficient and economical treatment of emulsified oily wastewater from industries such as oil refining, petrochemicals, offshore platforms, and machining within 30-60 seconds by using a dual matching coupling of gradient aperture and gradually changing electric field, under a safe voltage of ≤250V.

The high water content material conveying system based on bionics and active separation belongs to the technical field of bulk material conveying. A self-adaptive super-smooth interface is constructed through a gradient porous ceramic matrix and an electro-wetting regulation. The surface characteristics are dynamically regulated by voltage to adapt to the adhesion characteristics of different materials. Water-solid efficient separation is realized by ultrasonic cavitation and centrifugal force field. Through the active phase separation mechanism of "first dissociation and then separation", the water-solid separation efficiency is improved from less than 70% to 95% by changing the traditional single mechanical extrusion or gravity drainage. Magnetic suspension driving and piezoelectric energy harvesting are used to reduce energy consumption. The system can achieve the breakthrough effect of adhesion tending to zero, direct reuse of separated water and less than 1 kWh of energy consumption per ton, and is suitable for green conveying of industrial sludge, tailings and other scenes.

The technology disclosed herein provides an electrowetting on dielectric device (EWOD). Implementation of the EWOD disclosed herein includes a substrate, an electrode layer configured on top of the substrate, a dielectric layer configured on the electrode layer, wherein the dielectric layer comprises a nano-patterned top surface, a top plate, a micro-fluidic channel configured between the top plate and the dielectric layer comprises a nano-patterned top surface, and a hydrophobic layer between the dielectric layer comprises a nano-patterned top surface and the micro-fluidic channel. In some implementations, a hydrophobic layer may be configured on top of the dielectric layer having a nano-patterned top surface and the micro-fluidic channel configured between the top plate and the hydrophobic layer.

The present application relates to a kind of focal length dynamic regulation and control device and regulation and control method based on heat drive and pressure control, mainly solve the technical problems such as the existing single drive mode being difficult to consider wide range and high stability for electrowetting drive.This application adopts the technical scheme: the focal length dynamic regulation and control device, it includes microlens array, heat drive module, pressure control module and collaborative control unit;The microlens array is to set several microlens units on transparent substrate, the microlens unit is filled with optical liquid;The heat drive module is a thin film heater array formed by several thin film heaters, the thin film heater is integrated below the microlens array by microfabrication technology, each thin film heater is connected with external drive circuit by independent lead, realizes independent addressing control;The pressure control module includes micro pressure pump, sealed cavity, fluid pipeline, thermal expansion compensation cavity and micro fluid control valve array.

A method for moving an aqueous droplet comprising providing an electrokinetic device including a first substrate having a matrix of electrodes, wherein each of the matrix electrodes is coupled to a thin film transistor, and wherein the matrix electrodes are overcoated with a functional coating comprising: a dielectric layer in contact with the matrix electrodes, a conformal layer in contact with the dielectric layer, and a hydrophobic layer in contact with the conformal layer; a second substrate comprising a top electrode; a spacer disposed between the first substrate and the second substrate and defining an electrokinetic workspace; and a voltage source operatively coupled to the matrix electrodes. The method further comprises disposing an aqueous droplet on a first matrix electrode; and providing a differential electrical potential between the first matrix electrode and a second matrix electrode with the voltage source, thereby moving the aqueous droplet.