Bitmap display device control method for displaying grey level at electron sources, involves carrying voltage of column electrode, if grey level belongs to family, and bringing voltage to intermediate potential

摘要

The method involves distributing grey level to be displayed in two families of grey levels, where the family groups darkest gray level and less dark grey level. Voltage of column electrode is carried from intermediate potential to another potential if the gray level belongs to the family, where the intermediate potential is situated between two potentials displaying black and white respectively. The voltages are brought to intermediate potential in period lesser or equal to row selection period and in end of the period, respectively.