Display device for D/A conversion using load capacitances of...

Details Display device for D/A conversion using load capacitances of... Display device for D/A conversion using load capacitances of...

2005-08-16

2005-08-16

Osorio, Ricardo (Department: 2673)

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

C345S098000, C345S093000

Reexamination Certificate

active

06930665

ABSTRACT:
A display device uses the load capacitances of two signal lines to perform DA conversion. Serial digital/analog conversion circuits (SDAC) in a data driver are provided for every two adjacent signal lines and use the load capacitances of these two signal lines to successively convert to analog data those data from the parallel/serial conversion circuits (PSC), PSC that correspond to the pixels of odd-numbered pixel columns and apply the converted analog data to the pixels of odd-numbered pixel columns, and successively apply data from PSC that correspond to the pixels of even-numbered pixel columns to the pixels of even-numbered pixel columns. Because the source of error of the SDAC is determined only by the difference between the two load capacitances, a polysilicon liquid crystal display device may be and the characteristics of the TFT may consequently show fluctuation, but will not act as an error source.

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Y. Matsueda et al., “Low-Temperature Poly-Si TFT-LCD with Integrated 6-bit Digital Data Drivers”, SID 96 Digest, pp. 21-24.

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