Abstract:
An electrowetting device includes an electrowetting element having a first fluid; a second fluid immiscible with the first fluid, a configuration of the first and second fluids being controllable with an applied voltage; and at least one electrode for providing the applied voltage. The electrowetting device includes a plurality of electrical elements for providing the applied voltage, which include a first electrical element and a second electrical element. A portion of the first electrical element overlaps a portion of the second electrical element. The electrowetting device includes a dielectric layer between the portions of the first and second electrical elements, the dielectric layer formed at least partly of a dielectric material having a dielectric constant less than 3.9.
Abstract:
A method for fabricating an electrowetting display may include depositing a first material layer on a support plate; placing a first mask on the first material layer, wherein the first mask covers first portions of the first material layer and does not cover second portions of the first photoresist layer; exposing second portions of the first material layer to electromagnetic radiation; depositing a second material layer on the first mask and the exposed second portions of the first material layer; placing a second mask on the second material layer; and etching to remove portions of the second material layer and the second portions of the first material layer. Portions of the first and second material layers that remain subsequent to the etching form spacers and a grid of pixel wall extensions.
Abstract:
Electrowetting elements of a display device include a support plate, a bottom electrode, electrowetting oil and an electrolyte on the bottom electrode. The electrowetting oil is immiscible with the electrolyte, a top electrode is in electrical contact with the electrolyte, and the bottom electrode, the top electrode and the electrolyte form a portion of a circuit. The electrowetting elements each further include a first thin film transistor (TFT) that is switched on to select each of the electrowetting elements using active matrix addressing, and a second TFT that is switched on to provide a reset pulse to the portion of the circuit. The reset pulse can be used to reduce or eliminate backflow of the electrowetting oil.
Abstract:
In examples, an electrowetting element comprises an electrode for use in applying a voltage for controlling a configuration of first and second fluids which are immiscible. A surface of the electrode comprises a recess which is located away from a perimeter of the surface and which is formed by a region of the electrode having a reduced thickness.
Abstract:
An electrowetting display device may comprise at least one pixel region that includes: a hydrophobic layer portion; an oil disposed on the hydrophobic layer portion, wherein an amount of light transmitted through the pixel region is based, at least in part, on an area of the hydrophobic layer portion that is covered by the oil; and a thin film transistor (TFT); a photo-sensor configured to generate a voltage based, at least in part, on the amount of light that transmits through the pixel region; and an electronic control circuit configured to (i) receive the voltage from the photo-sensor and (ii) provide a driving signal to the TFT of the pixel region, wherein an amplitude of the driving signal is based, at least in part, on the voltage from the photo-sensor.
Abstract:
An electrowetting display device may comprise rows and columns of pixels. Each of the pixels may include a thin film transistor (TFT) that is switchable to select each of the pixels using active matrix addressing. The electrowetting display device may further comprise source lines connected to the TFT of each of the pixels; gate lines connected to the TFT of each of the pixels; and a supplemental capacitor disposed between each of the gate lines and a ground and having a capacitance approximately equal to an equivalent capacitance of a group of pixels that are interconnected with one another on one of the gate lines, wherein the group of pixels are a subset of the rows and columns of pixels.
Abstract:
A display device includes a first support plate. A pixel region is formed on the first support plate and a reflective layer is positioned in the pixel region. The reflective layer includes a specular reflector and a diffuse reflector.
Abstract:
An electrowetting display device includes a first support plate and a second support plate. A first fluid and a second fluid that is immiscible with the first fluid are between the first support plate and the second support plate. A plurality of pixel walls having concave side surfaces are formed on the first support plate to define a plurality of electrowetting pixels. A pixel electrode is disposed on the first support plate for applying a voltage within each electrowetting pixel to cause relative displacement of the first fluid and the second fluid.
Abstract:
An electrowetting display comprises a support plate on which individual electrowetting pixels separated from one another by pixel walls are formed. The individual electrowetting pixels include a first conductive layer and a second conductive layer on the support plate. The first conductive layer and the second conductive layer are separated by a dielectric layer in first portions of the individual electrowetting pixels. The first conductive layer and the second conductive layer are in electrical contact with one another in second portions of the individual electrowetting pixels, wherein the second portions of the individual electrowetting pixels may be U-shaped.
Abstract:
An electrowetting display comprises a first support plate and a second support plate, pixel regions between the first support plate and the second support plate, and two walls on the first support plate that delineate the pixel regions from one another. The two walls are separated by a gap. The electrowetting display further comprises an electrolyte solution between the first support plate and the second support plate and in the gap that separates the two walls.