| 摘要 |
In a driver circuit (1) for a matrix display with pixels (Pij) associated with cross points of data electrodes (DEj) and select electrodes (SEi), data signals (DSj) are supplied by the data driver (12) to the data electrodes (Dej) to store data voltages in pixels (Pij) associated with a selected one of the select electrodes (SEi). A bias circuit (13) increases a bias current (IB) of the data driver (12) only when an edge of at least one of the data signals (DSj) occurs or is expected to occur. The bias current (IB) is selected to be very small if no edge of the data signal (DSj) occurs or is expected to occur, and the power dissipation in the data driver (12) will be lowered. If no edge occurs or is expected to occur, the bias current (IB) has a low value during the whole select time (also referred to as address time) of a row (Ri) of pixels (Pij). If an edge occurs, there are several possibilities to allow the required short duration of the data setup time: the bias current (IB) has a high value during the whole select time of a row (Ri), or only during the data setup period.
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