Patent ID: 9565730
Date: 2017-02-07
CPC Classifications: G02F,G09G,H05B

Claim:
1. A backlight device, comprising: a light emitting unit that includes a first light source that emits light of a first light emission color, a second light source that emits light of a second light emission color, and a third light source that emits light of a third light emission color, the first, second, and third light emission colors being different from each other; a detection unit that includes first, second, and third color sensors, the first color sensor having a spectral sensitivity characteristic corresponding to the first light emission color, the second color sensor having a spectral sensitivity characteristic corresponding to the second light emission color, the third color sensor having a spectral sensitivity characteristic corresponding to the third light emission color, the detection unit detecting light to obtain first, second, and third detection values, respectively, the detected light being a mixture of a first component of the first light emission color emitted from the first light source, a second component of the second light emission color emitted from the second light source and a third component of the third light emission color emitted from the third light source; a temperature sensor that measures a temperature in a proximity of the first, second, and third light sources; a brightness conversion unit that separates each of the first, second and third detection values to obtain a detection value of the component of the first light emission color, a detection value of the component of the second light emission color, and a detection value of the component of the third light emission color, based on a correspondence relationship between the first, second, and third detection values and the detection value of the component of each of the first, second, and third light emission colors; and a calculation unit that corrects the detection values of the components of the first, second, and third light emission colors for each of the first, second, and third light emission colors by using information indicating a relationship between the measured temperature and a correction value, the calculation unit determining drive values for the first, second, and third light sources based on the corrected detection values, wherein each of the first, second, and third color sensors receives a mixed-color light including the mixture of the component of each of the first, second, and third light emission colors, and wherein the brightness conversion unit separates the mixed-color light.