Patent ID: 6121941
Filing Date: 2000-09-19
Classification: G09G

Abstract:
A method for controlling a matrix display having a multiplicity of picture elements, said matrix display displaying a video signal comprising active portions corresponding to picture information and inactive portions, said method wherein the control of picture elements is carried out line by line, comprising the steps of:scanning and storing in memory active portions of an input video signal at a first rate which corresponds to the density of picture information contained in the active portions, andreading out from said memory the stored information at a second rate determined by the density of picture information to be displayed and the time available for display comprising active and inactive parts, the density of picture information to be displayed being determined by the number of picture elements to be controlled,the number of control lines of the matrix display being greater than the number of lines of the video signal to be displayed, so that a ratio ft/za is reduced from the ratio required for a cathode ray tube, where ft is a clock frequency for signal processing and for controlling the display, and za represents the number of lines to be displayed.