US 2003/0142118 A1 · Image display and display method

Abstract

A liquid crystal display apparatus using a backlight (104) for display includes: a video signal time compression circuit (101) for compressing a video signal in the time axis direction and outputting the time-compressed video signal; an LCD controller (106) for driving a liquid crystal panel (105) based on the time-compressed video signal; a source driver (107) and a gate driver (108); a motion detection circuit (2) for detecting the amount of motion of a display image based on the video signal; a PWM modulation pulse generation circuit (4) for generating modulation pulses different in frequency according to the detection result from the motion detection circuit (2); and an inverter (103) for lighting up the backlight (104) based on the modulation pulses, to thereby enable reduction of image contour blurring in a moving image and reduction of flicker in a still image.

Claims36

Dependent claims

An image display apparatus for displaying an image by driving a passive light modulation device based on a video signal compressed in the time axis direction, the passive modulation device modulating light from a light source in a pixel-by-pixel manner based on an electric signal, the apparatus comprising:

motion detection means for detecting the 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 the detection result from the motion detection means;
and
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.

1 more element

Dependencies are inferred from the claim text.

Image display and display method

Life of this patent

Image display and display method

Life of this patent

Abstract

Claims36