LIQUID CRYSTAL DEVICE

PROBLEM TO BE SOLVED: To provide a liquid crystal device including a ferroelectric liquid crystal panel that operates with the response speed and switching angle satisfying required performance in a use temperature range.SOLUTION: A liquid crystal device comprises: a ferroelectric liquid crystal panel 10 that operates at a predetermined switching angle and response speed; a sensor 60 that measures temperature; a driving circuit 20 that supplies a driving voltage VD to the ferroelectric liquid crystal panel 10; a waveform generation circuit 30 that supplies a waveform signal P5 to the driving circuit 20; and a control circuit 40 that controls the waveform generation circuit 30. The driving circuit 20 outputs a first positive voltage during a first period of a first frame of the driving voltage, outputs a second positive voltage in a second period for a longer period of time than in the first period, outputs a first negative voltage in a first period of a second frame, and outputs a second negative voltage in a second period for a longer period of time than in the first period. The control circuit 40 changes the first voltage and the second voltage according to a temperature measured by the sensor 60.SELECTED DRAWING: Figure 1 【課題】使用温度範囲において応答速度とスイッチング角が要求性能を満たして動作する強誘電性液晶パネルを備えた液晶装置を提供すること。【解決手段】所定のスイッチング角と応答速度で動作する強誘電性液晶パネル１０と、温度を測定するセンサ６０と、強誘電性液晶パネル１０に駆動電圧ＶＤを供給する駆動回路２０と、該駆動回路２０に波形信号Ｐ５を供給する波形生成回路３０と、該波形生成回路３０を制御する制御回路４０と、を有し、駆動回路２０は、駆動電圧の第１フレームでは、第１期間に正の第１電圧を出力し、第２期間に第１期間より長い期間、正の第２電圧を出力し、第２フレームでは、第１期間に負の第１電圧を出力し、第２期間に第１期間より長い期間、負の第２電圧を出力し、制御回路４０は、センサ６０の測定温度に応じて第１電圧と第２電圧とを可変する構成とした。【選択図】図１