Abstract:
An active matrix electro-wetting on dielectric (AM-EWOD) device includes a plurality of array elements arranged in an array, each of the array elements including array element circuitry, an element electrode, and a reference electrode. The array element circuitry includes an actuation circuit configured to apply actuation voltages to the electrodes, and an impedance sensor circuit configured to sense impedance at the array element electrode to determine a droplet property at the array element. The impedance sensor circuit is operated by perturbing a potential applied to the reference electrode. The AM-EWOD device includes a common row addressing line. The impedance sensor circuit further is operated by supplying voltage signals over the common addressing line to effect both a reset operation and an operation for selecting a row in the array to be sensed. The circuitry isolates the array element from the actuation voltage during operating the impedance sensor circuit.
Abstract:
This disclosure provides systems, methods, and apparatus for electromechanical systems (EMS) devices with a plurality of electrically isolated electrode segments each connected to a distinct thin film transistor (TFT), where a plurality of TFTs drive the EMS device by applying a common voltage to the plurality of electrode segments. The plurality of TFTs can be configured to allow each electrode segment to have its own voltage during actuation. The EMS device can include a substrate, a stationary electrode over the substrate, and a movable electrode over the stationary electrode with a gap defined between the stationary electrode and the movable electrode. At least one of the stationary electrode and the movable electrode includes the plurality of electrode segments. The plurality of TFTs and the plurality of electrode segments can increase the stable range of the EMS device.
Abstract:
Au moins l'un des deux plans conducteurs rectangulaires, P1, prévus pour appliquer une tension aux bornes de chacun des pixels d'une matrice, est alimenté par deux bords adjacents b3, b4 à partir de sources de tension individuelles S v1 à s v6 , S h1 à S h6 réparties le long de chacun des bords. Les sources de tension ont des valeurs de tension différentes, variant de préférence mais pas obligatoirement de manière monotone croissante entre une valeur inférieure V h1 , V v1 du côté de la jonction J entre les deux bords b3 et b4 et une valeur supérieure V h6 ,V v6 de l'autre côté de chacun des bords. Les deux bords b3 et b4 par lesquels le plan conducteur est principalement alimenté sont découpés pour former des points de contact électrique localement isolés les uns des autres et régulièrement espacés, alimentés chacun par une source de tension individuelle respective. L'autre plan conducteur peut être alimenté de la même manière.