Patent ID: 6317104
Filing Date: 2001-11-13
Classification: G09G

Abstract:
A drive pulse controller for creating, for each image, a number of subfields Z from a first subfield to a Zth subfield in accordance with Z bit representation of each pixel, and a weighing value for each subfield, the drive pulse controller comprising:a system that determines a number of subfields Z based on brightness information;a time data source that stores light emission time data in association with the number of subfields Z, the light emission time data identifying a time location of a most-weighted subfield, the most-weighted subfield being a subfield that has a largest number of light emissions of all subfields;a system that selects the light emission time data for the most-weighted subfield in accordance with the determined number of subfields Z;a system that calculates a delay time for locating the most-weighted subfield at substantially a same position within a field period in accordance with the selected light emission time data, even when the number of subfields Z in the field is changed; anda delay system that delays a drive pulse in accordance with the calculated delay time.