In a display device for pictures, etc., adequate brightness of pictures to be displayed is provided by varying the luminous times of the luminous elements making up the a display panel. The luminous elements receive multiple-bit codes representing levels of brightness from signals to be displayed. A...http://www.google.com.au/patents/US5187578?utm_source=gb-gplus-sharePatent US5187578 - Tone display method and apparatus reducing flicker
