Patent ID: 6621489
Filing Date: 2003-09-16
Classification: G09G

Abstract:
An LCD display unit that displays video images principally by reflected light, comprising:a video setting unit that sets either a normal video signal or a specific image display signal as a video signal for image display; a gate voltage control unit that controls a gate voltage of drive elements of pixels; a common electrode control unit that controls common electrodes of the pixels; a source voltage control unit that controls a supply voltage to a data line drive circuit; and a power operation timing controller that controls operation timings of the units when a power-on signal or a power-off signal is detected, wherein, after the video setting unit sets the specific image display signal when a power-off signal is detected, the power operation timing controller causes the gate voltage control unit to turn off the gate voltage, the common electrode control unit to turn the common electrodes off, and next the source voltage control unit to turn off the supply voltage to the data line drive circuit, and wherein a point of time at which the common electrodes are turned off is set to a point of time after an image display by the specific image display signal is maintained for a specific time.