Method and apparatus for driving display device

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

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345 79, G09G 330

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061279935

ABSTRACT:
In a display device such as a thin-film EL display device, etc. formed with a dielectric layer disposed between a plurality of scanning side electrodes and a plurality of data side electrodes in the direction for them intersecting to each other, a modulation voltage, varied according to gradation display data is applied to the data side electrodes, and a positive or negative writing voltage is applied to the scanning side electrodes in a line order for a gradation display different in brightness. Binary coded signals corresponding to each gradation of a gradation display are used as the gradation display data. The logical value of the binary coded signal is inverted according to the polarity of the writing voltage. Thus, a common gradation display can be performed from one binary coded signal for both the negative driving that applies a negative writing voltage and the positive driving that applies a positive writing voltage. As a result, by only by adding a data conversion circuit for inverting a binary coded signal, the function that converts the correspondence relation between the gradation to be displayed and the gradation display data depending on the negative driving or positive driving can be incorporated.

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Flegal et al., Differential Aging Effects in ACTFEL Displays, SID 86 Digest, 1986, pp. 177-180.
Electronics, Prolong the Life of Thin-Film EL Flat Panels, Oct. 2, 1986, pp. 84-87.

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