초록 ▼

The present invention realizes display of the intermediate tone by shortening the selection period of the one scanning line and setting a mean voltage level applied to the pixels to 0 by selectively applying the pulse, to the pixels, for initializing the ferroelectric liquid crystal to the saturated

The present invention realizes display of the intermediate tone by shortening the selection period of the one scanning line and setting a mean voltage level applied to the pixels to 0 by selectively applying the pulse, to the pixels, for initializing the ferroelectric liquid crystal to the saturated reverse response condition and the pulse superposing the high frequency AC pulse to the pulse having a mean voltage of 0 for such pulse and then applying the AC pulse which holds the response condition of ferroelectric liquid crystal while such pulse group is not applied to the pixels, and moreover by controlling a voltage value or duty (rate of the period for applying high frequency AC pulse and the period for not applying the pulse) of the high frequency AC pulse to be superposed to such pulse depending on the display tone.

대표청구항 ▼

A method for driving a liquid crystal optical apparatus, forming pixels in the form of a matrix by providing the ferroelectric liquid crystal having AC stabilizing effect between a scanning electrode group and a control electrode group, wherein a first pulse is applied to the pixels in order to init

A method for driving a liquid crystal optical apparatus, forming pixels in the form of a matrix by providing the ferroelectric liquid crystal having AC stabilizing effect between a scanning electrode group and a control electrode group, wherein a first pulse is applied to the pixels in order to initialize the ferroelectric liquid crystal to a saturated reverse condition depending on the voltage difference between the signal supplied to the scanning electrode group and the signal supplied to the control electrode, a second pulse is applied to initialize the ferroelectric liquid crystal to a saturated response condition or a third pulse where a high frequency AC pulse is superposed to the second pulse, is thereafter applied to initialize the liquid crystal to the desired response condition including intermediate tone, an AC pulse group is then applied to hold the desired response condition, a mean voltage level of the first and second pulses and a mean voltage level of the first and third pulses are 0, and a high frequency AC pulse superposed to the second pulse is controlled depending on the display tone.