Patent ID: 9618789
Date: 2017-04-11
CPC Classifications: G02F,G09G,H05B

Claim:
1. A planar lighting apparatus comprising: a planar light source including a second housing which covers the planar light source; a second temperature sensor disposed outside of the first housing and inside of the second housing; a light-source drive circuit including a plurality of light-source drive sections each of which drives and controls the light emitting elements belonging to the corresponding light emitting region; a memory section to memorize setup information including temperature change coefficients of the light emitting regions; and a computing section which calculates a driving condition of each of the plurality of light-source drive sections, calculates temperatures of the light emitting regions by using a measurement value of the first temperature sensor, a measurement value of the second temperature sensor, and the setup information in the memory section, and corrects the driving condition of each of the plurality of light-source drive sections based on the calculated temperatures of the light emitting regions.