Display device having an improved video signal drive circuit

Details Display device having an improved video signal drive circuit Display device having an improved video signal drive circuit

2005-01-04

2005-01-04

Hjerpe, Richard (Department: 2673)

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

C345S206000

Reexamination Certificate

active

06839047

ABSTRACT:
A display device has pixels, signal lines coupled to the pixels, and a video signal drive circuit for supplying signals to the signal lines in parallel, based upon data transferred serially from an external system. The video signal drive circuit includes plural stages each formed by a column of switching elements. The switching elements of each stage double successively in number as a final stage is approached. Each of the switching elements of each stage excluding the final stage is connected to a pair of switching elements in a succeeding stage. Each of the pair of switching elements is repeatedly and alternately switched ON with the other of the pair of switching elements being switched OFF, and a frequency of the ON-OFF switching of the pair of switching elements of each stage is successively halved as the final stage is approached.

REFERENCES:
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patent: 5335023 (1994-08-01), Edwards
patent: 5754155 (1998-05-01), Kubota et al.
patent: 20020145602 (2002-10-01), Matsueda
patent: 996108 (2000-04-01), None

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