| 摘要 |
In an active matrix display device, such as AMLCD, having an array of pixels (P) addressed via sets of row and column conductors ( 14, 15 ) to which, respectively, selection and data signals are applied, each pixel comprises a plurality of sub pixels (P 1 -P 4 ) which each have an associated switch, for example a TFT, (T 1 -T 4 ) and which are addressed with data signals through a common switch (T 1 ) coupled to a column conductor ( 15 ). Addressing the sub pixels through a common switch reduces the effective capacitance of the column conductor. By appropriate control of the switches (T 1 -T 4 ) the pixels can be driven in a first mode in which the common switch (T 1 ) is operated to control the simultaneous addressing of the sub pixels (P 1 -P 4 ) with a data signal, for example, for a video display with full grey scale capability, and in a second mode in which the switches (T 1 -T 4 ) are controlled sequentially to allow different data signals to be applied to the individual sub pixels, for example, as required for a low power standby mode of operation with limited grey scale and colour capability.
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