Patent ID: 6980225
Filing Date: 2005-12-27
Classification: G09G

Abstract:
1. An image display apparatus for displaying an image by driving a passive light modulation device based on a video signal compressed in a time axis direction the passive light modulation device modulating light from a light source in a pixel-by-pixel manner based on an electric signal, the image display apparatus comprising: motion detection means for detecting an amount of motion of a display image based on the video signal; modulation pulse generation means for generating modulation pulses different in period, phase or pulse width according to a detection result from the motion detection means; light source driving means for enabling the light source to emit light at optimum timing corresponding to the motion amount by intermittently driving the light source according to the modulation pulses generated by the modulation pulse generation means; and comparison means for comparing the motion amount detected by the motion detection means with a predetermined amount, wherein the modulation pulse generation means outputs a first modulation pulse synchronizing with a vertical synchronizing signal and having a same frequency as the vertical synchronizing signal when the motion amount is greater than the predetermined amount, and outputs a second modulation pulse having a frequency higher than the first modulation pulse when the motion amount is smaller than the predetermined amount.