Patent ID: 6069597
Filing Date: 2000-05-30
Classification: G09G

Abstract:
A field emission display (FED) screen comprising:a brightness signal indicating a brightness level for said field emission display screen;a plurality of column drivers each coupled to a respective column line, said column drivers for driving amplitude modulated voltage signals over column lines;a plurality of row drivers each coupled to a respective row line, said plurality of row drivers for driving a first voltage signal over one row line at a time, wherein a pixel is comprised of intersections of one row line and at least three column lines;a horizontal synchronization clock signal for synchronizing the refresh of individual row lines; anda brightness control circuit coupled to receive said brightness signal and coupled to enable said plurality of row drivers, said brightness control circuit for generating a row on-time pulse having a width that varies proportional to said brightness signal and generated in synchronization with said horizontal synchronization clock signal, and wherein said plurality of row drivers are enabled to apply said first voltage signal only during said on-time pulse and disabled otherwise.