Liquid crystal display device having a temperature sensor
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United States of America Patent
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Mar 2, 2021
Grant Date -
Oct 31, 2019
app pub date -
Apr 24, 2019
filing date -
Apr 26, 2018
priority date (Note) -
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status (Latency Note)
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Abstract
A liquid crystal display device includes: a liquid crystal panel; light sources provided on a rear surface of the liquid crystal panel; a temperature sensor configured to detect an in-device temperature and provided on a rear surface side of the liquid crystal panel; and a control circuit configured to control lighting of the light sources by adjusting a duty ratio of a driving signal by pulse width modulation on the basis of the in-device temperature detected by the temperature sensor. When the in-device temperature is within a predetermined temperature range, the control circuit updates a current duty ratio of the driving signal in such a manner that the difference between the current duty ratio for each unit time and a target duty ratio preset for the in-device temperature is reduced in a stepwise manner.
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