Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Patent
1994-12-13
1996-10-01
Saras, Steven J.
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
345 96, G09G 336
Patent
active
055614418
ABSTRACT:
A liquid crystal display panel of the active matrix type which uses, as switching elements, non-linear resistance elements that exhibit asymmetric non-linear characteristics depending upon the polarity of the applied voltage, without causing flickering or scorching of the display. The amplitude of the data signal is changed depending on the characteristics of the non-linear resistance element, such as a2 in the positive-side field and b2 in the negative-side field, and the panel is driven in a manner that the transmission factor modulation range is the same in the positive-side field and in the negative-side field. In the gradation display based on the pulse width modulation, the pulse width is adjusted depending on the non-linear characteristics in the positive-side field and in the negative-side field, such that the relationship between the degree of gradation and the transmission factor is the same on the positive side and on the negative side.
REFERENCES:
patent: 4743096 (1988-05-01), Wakai et al.
patent: 4872059 (1989-10-01), Shinabe
patent: 4945352 (1990-07-01), Ejiri
patent: 5014048 (1991-05-01), Knapp
patent: 5117298 (1992-05-01), Hirai
patent: 5119085 (1992-06-01), Yamazaki
`Patent Abstracts of Japan, vol. 15, No. 192 (P-1202) May 17, 1991.
Citizen Watch Co. Ltd.
Saras Steven J.
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