Patent ID: 7248240

Claim:
A liquid crystal display system comprising: a thin film transistor screen; a column driver coupled to said thin film transistor screen for controlling columns on said thin film transistor screen; a row driver coupled to said thin film transistor screen for controlling rows on said thin film transistor screen; a timing controller coupled to said column driver and said row driver for controlling timing for said column driver and said row driver; a video signal processor coupled to said timing controller for processing video signals; a plurality of cold cathode fluorescent lamps for illuminating said thin film transistor screen; a sensing circuit coupled to said plurality of cold cathode fluorescent lamps which detects disconnection if one cold cathode fluorescent lamp is disconnected; and a controller coupled to said plurality of cold cathode fluorescent lamps which reduces the total current supplied to the cold cathode fluorescent lamps which remain connected if said sensing circuit detects that said one cold cathode fluorescent lamp is disconnected.