Self scanned amorphous silicon integrated display having active

Details Self scanned amorphous silicon integrated display having active Self scanned amorphous silicon integrated display having active

1998-11-30

2000-04-04

Hjerpe, Richard A.

Computer graphics processing and selective visual display system

Display driving control circuitry

Display power source

345212, 345100, G09G 500

Patent

active

060467363

ABSTRACT:
A Self Scanned Amorphous Silicon Integrated Display (SASID) uses one or more operational amplifiers in a differential amplifier configuration, to apply the ramp signal to the column drivers. The operational amplifiers are configured to receive the ramp signal at non-inverting input terminals and to apply the ramp signal to the data bus at respectively different locations. The operational amplifiers are also coupled to receive respective feedback signals at inverting input terminals. The feedback signals are taken from points on the bus that are distant from the point at which the amplifiers apply the ramp data signal to the bus. The display device includes a column driver having an initialization sequence in the vertical blanking interval. The signal used to render the column driver TFT conductive is determined in the vertical blanking interval and maintained on a capacitor in the column driver for the duration of the vertical field. The column driver also includes an autozero comparator which is subject to the autozero operation during the vertical blanking interval.

REFERENCES:
patent: 5266936 (1993-11-01), Saitoh
patent: 5317401 (1994-05-01), Dupont et al.
patent: 5426447 (1995-06-01), Lee
patent: 5555001 (1996-09-01), Lee et al.

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