Display device conversion device, display device correction circuit, display device driving device, display device, display device examination device, and display method
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United States of America Patent
Stats
-
Jun 3, 2008
Grant Date -
Aug 5, 2004
app pub date -
Dec 22, 2003
filing date -
Dec 27, 2002
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The liquid crystal display device inputs a signal, corrected by a correction circuit provided with a sigmoid inverse function generator, to a source driver. A sigmoid function which is an S-shaped function is used to approximate an input/output characteristic (applied voltage-transmittance curve) of a liquid crystal panel. The sigmoid inverse function generator converts an input signal by using an inverse function of the sigmoid function obtained by performing the approximation. A .gamma. conversion circuit provided on the correction circuit and the sigmoid inverse function generator realize the desired .gamma. characteristic regardless of a characteristic of the liquid crystal panel. Further, since the inverse function of the sigmoid function which is an S-shaped function is used, it is possible to provide a display device which corrects the input/output characteristic of the display panel by performing the approximation in accordance with not plural functions but a single function (without dividing the characteristic into sections).
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