Source driver circuit device having improved level correction ci

Details Source driver circuit device having improved level correction ci Source driver circuit device having improved level correction ci

1994-04-28

1998-04-28

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

By amplitude

327 93, 327 96, G11C 2702

Patent

active

057449864

ABSTRACT:
A source driver circuit device for decreasing a gap of output errors of a plurality of driver circuits which perform a serial/parallel conversion of a video signal, comprises a plurality of sample-and-hold circuits arranged in the order for sequentially sampling levels of an input video signal; a plurality of signal output circuits for respectively generating voltage outputs corresponding to holding levels of said plurality of sample-and-hold circuits; a plurality of reference level sample-and-hold circuits each of which is provided with each predetermined number of said sample-and-hold circuits, and for sampling a reference level; a plurality of sample value output circuits for respectively generating voltage outputs corresponding to holding levels of said plurality of reference level sample-and-hold circuits; and an output error correction circuit for performing an output level correction in each of said plurality of signal output circuits on the basis of a level difference between said reference level and an average value of a plurality of outputs issued from said plurality of sample value output circuits. Therefore, it is possible to decrease the level difference between output errors among the driver circuit device.

REFERENCES:
patent: 5162670 (1992-11-01), Itakura et al.
patent: 5252956 (1993-10-01), Senn et al.
patent: 5311087 (1994-05-01), Suganuma
patent: 5343089 (1994-08-01), Itakura et al.
patent: 5416432 (1995-05-01), Lewis et al.

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