Patent ID: 6151016
Filing Date: 2000-11-21
Classification: G09G

Abstract:
An erasing device for a liquid crystal display image, provided in a liquid crystal display device having a liquid crystal display panel whose pixels are driven by active elements, for erasing a display image on said liquid crystal display panel when a power source of a main body of said liquid crystal display device is turned OFF, comprising:power source OFF detecting means for detecting an OFF signal that turns OFF the power source of the main body of said liquid crystal display device;panel power maintaining means for supplying power to said liquid crystal display panel for a certain period when said power source OFF detecting means detects said OFF signal; anderasing means for, when said power source OFF detecting means detects said OFF signal, applying to all pixels in said liquid crystal display panel an ON-level voltage which is a saturation voltage, and subsequently applying an OFF-level voltage to said all pixels, using the power supplied by said panel power maintaining means.