Display apparatus of adjusting gamma and brightness based on ambient light and its display adjustment method
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United States of America Patent
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Issued Date -
Sep 24, 2009
app pub date -
Mar 20, 2008
filing date -
Mar 20, 2008
priority date (Note) -
Abandoned
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Abstract
This invention discloses a display apparatus capable of adjusting gamma and brightness based on ambient light and its display adjustment method. The display apparatus is adjusted to display an image output signal based on an image input signal and the correlated color temperature and brightness of an ambient light. The display apparatus includes a plurality of light sensing circuits, a memory unit, an image processing module, and a display module. The light sensing circuit senses the ambient light to produce a digital ambient color temperature index value. The memory unit stores a lookup table of brightness expression rates and gamma adjustment parameters corresponding to different color temperature index values. The image processing module produces a gamma adjustment parameter by a lookup table based on the color temperature index value and generates the gamma expression rate of the image input signal. The image processing module adjusts the image input signal to generate the image output signal based on the gamma adjustment parameter. The display module displays the image output signal.
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