Patent ID: 7639223

Claim:
A liquid crystal display apparatus, comprising: a liquid crystal panel; a driver configured to drive the liquid crystal panel; a control circuit configured to control the driver in response to a display data signal and control signal supplied from an exterior, the display data signal including display data that is to be displayed on the liquid crystal panel; and a check circuit configured to detect a change between frames in a freeze-detection-purpose signal that is included in at least one of the display data signal and control signal so as to output a check signal responsive to presence/absence of the change, the freeze-detection-purpose signal being independent of the display data to be displayed on the liquid crystal panel and configured to change at intervals, wherein the check circuit is configured to detect whether the freeze-detection-purpose signal has a value that is inverted from frame to frame and the display data is frozen when the freeze-detection-purpose signal is not inverted from frame to frame.