| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent deterioration in characteristics due to application of a DC to a light-modulating layer when an abnormality occurs on a reference clock signal in a flat surface display device configured so as to control a video signal output based on the reference clock signal, and also to achieve an improvement in productivity as well as low cost. SOLUTION: When a clock detection circuit 108 for outputting a 1st or a 2nd detection signal according to the state of the reference clock signal outputs the 1st detection signal, the voltage of video bus wiring is set to a video signal potential, when the 2nd detection signal is outputted therefrom, a data line potential control circuit 109 sets the voltage of the video bus wiring to a common potential; when an abnormality occurs on the reference clock signal, each voltage of a pixel electrode and a counter electrode is set to a same potential by the 2nd detection signal outputted, and thus a DC voltage is prevented from being applied to a liquid crystal layer held between the electrodes.</p> |
