Patent ID: 7408541
Filing Date: 2008-08-05
Classification: G06F,G09G,Y02D

Abstract:
1. A liquid crystal display device, being configured such that at least one internal power supply, which is a power supply for driving gate lines of a display part in the liquid crystal display device, is automatically changed, using a power supply changeover circuit, from a first power supply, which includes a luminance inclination circuit, to a second power supply, which includes a power holding circuit, and which is different from the first power supply, when an input power supply fed to the liquid crystal display device is cut off, wherein said first power supply and said second power supply are connected in parallel and further wherein said power supply changeover circuit directly detects the cut off of the input power supply, wherein, after the input power supply is cut off, a voltage based on said second power supply is outputted to all gate signal lines of the display part.