LCD driving circuit

Details LCD driving circuit LCD driving circuit

2005-04-26

2005-04-26

Chow, Dennis-Doon (Department: 2675)

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

C345S096000, C345S100000

Reexamination Certificate

active

06885358

ABSTRACT:
LCD driving circuit for applying a signal of a first polarity and a signal of a second polarity opposite to the first polarity to an LCD alternately, including first and second data latches for latching source data in succession, a DAC for converting a latch data into an analog signal to provide a signal of the first polarity, a driving signal processing block for receiving a converted signal from the DAC to provide a signal of the second polarity, a multiplexer for selecting either one of signals of first and second polarities in response to a polar signal, and a buffer for buffering a signal from the multiplexer and applying a source driving signal to LCD cells, thereby permitting to use only one type of DAC.

REFERENCES:
patent: 5280279 (1994-01-01), Nakazawa et al.
patent: 5754156 (1998-05-01), Erhart et al.
patent: 6008801 (1999-12-01), Jeong
patent: 6049321 (2000-04-01), Sasaki
patent: 6256005 (2001-07-01), Kim

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