POWER SAVING CIRCUIT AND METHOD FOR DRIVING AN ACTIVE MATRIXDISPLAY

摘要

Switches and capacitors are efficiently used to passively change the voltag e level on column electrodes without active driving by the column driver circuit. This significantly reduces the power needed by the column driver circuit to drive voltages of alternating polarity onto the column electrodes. In this way, significant power is saved in both the pixel inversion and the row inversion schemes. The average power savings of various of the embodiments exceeds 50 % compared with a simple conventional implementation of a column driver circuit. Another aspect similarly reduces the power used by the column driver circuit in the back plane switching scheme.