Apparatus and method for driving a liquid crystal display

Details Apparatus and method for driving a liquid crystal display Apparatus and method for driving a liquid crystal display

1994-10-11

1995-09-05

Weldon, Ulysses

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

345 98, G09G 336

Patent

active

054482593

ABSTRACT:
This invention provides a driving apparatus for a liquid-crystal display, comprising a dot-matrix liquid-crystal display with column electrodes and row electrodes, a control circuit for, in enlarging and displaying the display data, producing a display control signal containing a plurality of pulses during the latch period of a latch signal that latches the display data, a column-electrode driving section for latching the display data in a latch circuit in response to the display control signal from the control circuit, and based on the latched display data, causing a driving circuit to drive the column electrodes of the liquid-crystal display, and a row-electrode driving section for simultaneously driving a plurality of adjacent row electrodes of the liquid-crystal display in response to the display control signal from the control circuit. The present invention also provides a driving method for a liquid-crystal display, comprising the steps of selecting a single line of column electrodes according to the display data and at the same time, selecting a plurality of adjacent row electrodes at a time, when the display data is enlarged and displayed on a dot-matrix liquid-crystal display.

REFERENCES:
patent: 4901066 (1990-02-01), Kobayashi et al.
patent: 5179371 (1993-01-01), Yamazaki

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