Patent ID: 6603451
Filing Date: 2003-08-05
Classification: G09G

Abstract:
A display arrangement, comprising:a flat panel display device having an array of pixels; and a driving circuit arrangement for switching each of the pixels between two intensity levels at a rate greater than the frame refresh rate so as to produce the visible effect of intermediate intensity levels, wherein said driving circuit includes an intensity level error register for each intermediate intensity level, means for selecting one of said intensity level error registers according to a signal representative of the visible effect of the intermediate intensity level that is desired that a particular pixel should produce, means for setting the particular pixel to either a first intensity level or a second intensity level depending on the value contained in said selected intensity level error register; and means for updating the value contained in said selected intensity level error register by adding a value corresponding to the first intensity level or the second intensity level to which the particular pixel was set, subtracting a value corresponding to the intermediate intensity level, the visible effect of which it is desired that the particular pixel should produce, and adding a random number.