Drive system for liquid crystal display device
Номер патента: US4227192A
Опубликовано: 07-10-1980
Автор(ы): Fukuo Sekiya, Heihachiro Ebihara, Takashi Yamada
Принадлежит: Citizen Watch Co Ltd
Опубликовано: 07-10-1980
Автор(ы): Fukuo Sekiya, Heihachiro Ebihara, Takashi Yamada
Принадлежит: Citizen Watch Co Ltd
Реферат: Drive signals are applied to the segment and digit electrodes of a liquid crystal display device in a time-multiplexed manner by means of a control circuit adapted to control first and second gates the output of one of which is selected as a segment signal by selection means, and further adapted to control a digit signal generating circuit for producing a digit signal that cooperates with the segment signal to drive the display. The effective application of drive signals allows a reduction in the number of segment electrodes and in the quantity of associated wiring so that the degree of integration on an IC chip can be increased.
RMS Voltage control with variable duty cycle for matching different liquid crystal display materials
Номер патента: US4385294A. Автор: Larry L. Miles. Владелец: Texas Instruments Inc. Дата публикации: 1983-05-24.