Patent ID: 6259492
Filing Date: 2001-07-10
Classification: G09G

Abstract:
An electro-optical apparatus comprising:an antiferroelectric liquid crystal panel; andprocessing means for performing a series of normalization processes as many times as necessary to provide uniform brightness, in a no voltage condition, of all pixels required to exhibit a uniform electro-optical performance in a normalized level that is set not lower than a minimum brightness level and not higher than a level approximately equal to an aging brightness level, wherein said minimum brightness level represents a saturation value of the brightness level, in a no voltage condition, obtained by successively applying to said liquid crystal panel for a period of time, a voltage that causes only liquid crystal molecules in an antiferroelectric state to make a transition to a ferroelectric state, and then terminating the applied voltage, and wherein said aging brightness level represents a saturation value of the brightness level, in a no voltage condition, obtained by applying alternately to said liquid crystal panel, a voltage for a period of time that causes liquid crystal molecules in the antiferroelectric state to make a transition to the ferroelectric state and a voltage for a period of time that causes liquid crystal molecules in the ferroelectric state to make a transition to the antiferroelectric state and then terminating the applied voltage.