Driving circuit used in display apparatus and liquid crystal dis

Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix

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345 87, 345 89, 345 94, G04G 336

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active

059233125

ABSTRACT:
A driving circuit used in a display apparatus includes a plurality of output circuits for selecting two reference gradation voltages among a plurality of different reference gradation voltages based on display data and outputting an interpolation voltage corresponding to the display data using the two reference gradation voltages; and a plurality of supply lines for supplying the plurality of reference gradation voltages. The supply lines including a plurality of voltage supply lines and a plurality of signal supply lines. One of the plurality of voltage supply lines supplies a voltage having a minimum difference from the voltage of a common electrode of the display apparatus and another of the plurality of voltage supply lines supplies a voltage having a maximum difference from the voltage of the common electrode. The two reference gradation voltages selected by each of the output circuits are supplied by one of a plurality of pairs of supply lines. At least one of the pair has a signal supply line and a supply line having a voltage higher than the signal supply line, and another of the pairs has a signal supply line and a voltage supply line having a voltage lower than the signal supply line.

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H. Okada et al., SID 94 DIGEST, pp. 347-350, 1994 "An 8-bit Digital Data Driver for AMLCDs".
H. Okada et al., SID 93 Digest, pp. 11-14, 1993 "TFT-LCDs Using Newly Designed 6-bit Digital Data Drivers".
IBM Technical Disclosure Bulletin, vol. 33, No. 6B, pp. 384-385, 1990 "Driving Method for TFT/LCD Grayscale".

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