Patent ID: 6034654
Filing Date: 2000-03-07
Classification: G09G

Abstract:
A method for controlling an image display screen having cells arranged in rows and columns, the cells being either in an ""OFF"" state or in an ""ON"" state in which they are activated and produce light, the method comprising for each row and during an image period:dividing said image period into n activation sequences including a first activation sequence and a second activation sequence, said first activation sequence being longer than said second activation sequence;subdividing the first activation sequence into first and second subsequences;activating the cells by placing each cell in the ""OFF"" state or in the ""ON"" state at the beginning of each activation sequence, said cells including first cells to be displayed at a first luminance level and second cells to be displayed at a second luminance level lower than said first luminance level;activating the first cells during the second activation sequence and during the first subsequence, said second activation sequence and said first subsequence corresponding to the first luminance level; andactivating the second cells for a period of time corresponding to the second luminance level and including the second activation sequence such that the first and second cells are both activated during the second activation sequence.