Communications: electrical – Continuously variable indicating – With meter reading
Patent
1990-06-28
1992-12-08
Oberley, Alvin E.
Communications: electrical
Continuously variable indicating
With meter reading
340784, G09G 102
Patent
active
051701588
ABSTRACT:
A display device has a driver circuit for driving data lines in a matrix display panel according to input digital signals. The driver circuit includes a number of digital-to-analog (D/A) converters, which number is less than the number of pixels contained in one horizontal scanning line. The D/A converters are repeatedly used to sequentially convert portions of the input digital image signal corresponding to one horizontal scanning line. The analog signals obtained by each D/A conversion are retained by a sample-and-hold circuit. When storage for one horizontal scanning line is completed, the signals are simultaneously delivered to the data lines. Therefore the display device can be reduced to a small circuit size. Also the offset voltage of the sample-and-hold circuitry can be reduced, since the outputs from the D/A converters can be sampled at an interval longer than the interval between pixels in the input digital signals.
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Electronics Update, 1989, LSIH 5027A/5028, Japanese Translation.
Kabushiki Kaisha Toshiba
Oberley Alvin E.
Wu Xiao Min
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