Four-level voltage supply for liquid crystal display

Details Four-level voltage supply for liquid crystal display Four-level voltage supply for liquid crystal display

G - Physics

06

F

375/39

G06F 3/14 (2006.01) G09F 9/00 (2006.01) G09G 3/18 (2006.01)

Patent

CA 1048183

ABSTRACT OF THE DISCLOSURE A liquid crystal display enabling circuit wherein a backplate electrode of a liquid crystal display is activated by a four-level voltage while the respective segment electrodes thereof are activated by a two-level voltage. The circuit in- cludes at least two input terminals, five output terminals, a voltage dividing resistor network and complementary MOSFET switching means which provide the four-level voltage for the backplate electrode and the two-level voltage for the segment electrodes. In an alternative embodiment, the circuit may be implemented using MOS integrated circuit technology rather than bipolar integrated circuit technology.

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