Patent ID: 6133894
Filing Date: 2000-10-17
Classification: G02F,G09G,H04N

Abstract:
A driving method for an optical apparatus including an optical modulation means having a planar extension including two-dimensionally distributed optical modulation sites for modulating an optical state based on signal carrying gradation data, and readout light illumination means for illuminating the optical modulation means with readout light for reading out picture data, said driving method comprising the steps of:line-sequentially scanning the two-dimensionally distributed optical modulation sites of the optical modulation means for determining optical modulation states and gradation periods at the respective optical modulation sites over the planar distribution of the optical modulation means; anddriving the readout light illumination means to simultaneously supply readout light having a planar light intensity distribution over to the planar extension of the optical modulation means so as to provide a constant product of a gradation period and a readout light intensity at each optical modulation site of the optical modulation means.