Patent ID: 6023257
Filing Date: 2000-02-08
Classification: G09G,Y10S

Abstract:
In a method of driving an active matrix liquid crystal display device without a flicker, said device receiving an image signal with a polarity that is periodically reversed and including a display panel having pixels, a memory to store information about response characteristics of said pixels, a correction circuit to correct said image signal in accordance with said information; and a driver circuit to apply the corrected image signal to said pixels; the improvement comprising a step ofreversing the polarity of said image signal so infrequently that a flicker in said display panel is prevented;measuring an intrinsic frequency at which said flicker occurs for each pixel by changing frequency of an applied voltage in a test mode;detecting a voltage which is actually applied to said display from transmissivity thereof, said transmissivity corresponding to said intrinsic frequency;storing a differential voltage of said applied voltage and said actual applied voltage as said information in said memory;adding said information to said image signal in normal mode in said correction circuit; andsupplying said added image signal into the corresponding pixel with said driver circuit.