Light amount control apparatus, control method therefor, and display apparatus
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United States of America Patent
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Sep 9, 2014
Grant Date -
Nov 15, 2012
app pub date -
Apr 18, 2012
filing date -
May 11, 2011
priority date (Note) -
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status (Latency Note)
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Abstract
A first current amount which has been preset so that the light amount of an LED element reaches a target light amount value at a predetermined reference ambient temperature, and a thermal correction coefficient for correcting the first current amount so that the light amount of the element reaches the target light amount value at an ambient temperature different from the reference ambient temperature are stored. Furthermore, when the light amount of the LED element reaches the target light amount value, an aging correction coefficient for correcting the first current amount to correct aging at the reference ambient temperature is calculated from a second current amount supplied to the LED element and the thermal correction coefficient corresponding to the ambient temperature of the LED element, and is then stored.
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