Shift register useful as a select line scanner for a liquid crys

Details Shift register useful as a select line scanner for a liquid crys Shift register useful as a select line scanner for a liquid crys

1994-08-11

1995-04-25

Wambach, Margaret Rose

Electrical pulse counters, pulse dividers, or shift registers: c

Shift register

Particular output circuit

327185, 327211, 327544, G11C 1900

Patent

active

054105838

ABSTRACT:
A select line scanner for a liquid crystal display includes a plurality of cascaded stages each having an input terminal and an output terminal. Each stage includes a push-pull output circuit including pull up and pull down transistors driven with separate control signals. A further transistor has its conduction path coupled between the control electrode and a point of potential of sufficient value to turn the pull up transistor off. The control electrode of the further transistor is coupled to an output of a succeeding one of the cascaded stages to insure that the output of the respective stage cannot drift to an on state.

REFERENCES:
patent: 5055709 (1991-10-01), Smith
patent: 5055720 (1991-10-01), Tiede
patent: 5222082 (1993-06-01), Plus
patent: 5300822 (1994-04-01), Sugahara et al.

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