Patent ID: 6975298
Filing Date: 2005-12-13
Classification: G09G

Abstract:
1. An active matrix display device comprising: a display medium interposed between a pair of substrates; a plurality of signal lines and a plurality of scan lines, each supported by one of the pair of substrates and intersecting each other; a plurality of pixel electrodes supported by the one of the pair of substrates and arranged in matrix; a counter electrode supported by the other of the pair of substrates and interposing the display medium between the pixel electrodes; a plurality of pairs of memory circuits, each provided between each of the pixel electrodes and a corresponding one of the signal lines, wherein each pair of memory circuits comprises a first memory circuit connected to the corresponding signal line and a second memory circuit connected to the corresponding pixel electrode, and either of two different potentials is supplied to the corresponding pixel electrode depending on a state of the second memory circuit; a plurality of first switches, each connected between a corresponding first memory circuit and a corresponding signal line, which are selectively turned on by a selective signal from a corresponding scan line and which enable to write data on the corresponding signal line to the corresponding first memory circuit; a plurality of second switches, each connected between a corresponding first memory circuit and a corresponding second memory circuit, which enable to transfer data from the corresponding first memory circuit to the corresponding second memory circuit when turned on; at least one transfer control line for supplying a transfer signal which selectively turns the second switches on; and a transfer control line driver circuit for driving the transfer control line.