Active matrix display device
AssigneeKoninklijke Philips Electronics N.V.
InventorFranciscus Budzelaar
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Abstract
The invention relates to an active matrix display device (6) comprising a display panel (2) with a matrix of display pixels (3), and row and column electrodes (11,12) coupled to the display pixels (3). Each of the display pixels (3) has a current mirror circuit adapted to receive a programming current (Iprog) via the column electrodes (11) and to reproduce the programming current (Iprog) for driving an emissive element (14). The display display device (6) is further arranged to execute a calibration phase wherein a calibration voltage (Vcal) is applied at each column electrode (11) before the programming current (Iprog) is applied.
Claims11
Active matrix display device (6) comprising a display panel (2) with a matrix of display pixels (3), and row and column electrodes (11,12) coupled to said display pixels (3), each of said display pixels (3) having a current mirror circuit adapted to receive a programming current (Iprog) via said column electrodes (11) and to reproduce said programming current (Iprog) for driving an emissive element (14), wherein said display device (6) is further arranged to execute a calibration phase wherein a calibration voltage (Vcal) is applied at each column electrode (11) before said programming current (Iprog) is applied and said calibration voltage is substantially maintained at said column electrode (11) for each of said display pixels (3) until said programming current (Iprog) is applied.
Method for calibrating an active matrix display device (6) comprising a 20 display panel (2) with a matrix of display pixels (3), and row and column electrodes (11,12) coupled to said display pixels (3), each of said display pixels (3) comprising a current mirror circuit adapted to receive a programming current (Iprog) via said column electrodes (11) and to reproduce said programming current (Iprog) for driving an emissive element (14), comprising the steps of:
- applying a calibration voltage (Vcal) to each column electrode (11) before said programming current (Iprog) is applied;
- substantially maintaining said calibration voltage (Vcal) at said column electrode (11) until said programming current (Iprog) is applied.
Dependencies are inferred from the claim text.