US Patent No. 9,907,133

BACKLIGHT DEVICE AND BACKLIGHT CONTROL METHOD


Patent No. 9,907,133
Issue Date February 27, 2018
Title Backlight Device And Backlight Control Method
Inventorship Katsuyuki Matsui, Tokyo (JP)
Assignee NEC DISPLAY SOLUTIONS, LTD., Tokyo (JP)

Claim of US Patent No. 9,907,133

1. A backlight device, comprising:
a plurality of light sources that emit light of a plurality of light emission colors, each of the light sources emitting light
of a different light emission color;

a plurality of color sensors, each of the color sensors receiving mixed-color light emitted from the light sources to detect
light emission states of the light sources, the mixed-color light including a mixture of a component of each of the light
emission colors;

a temperature sensor that measures a temperature in a proximity of the plurality of light sources;
a brightness conversion unit that separates the mixed-color light to obtain a detection value for each component of the light
emission colors by converting values indicating the detected light emission states; and

a calculation unit that corrects the obtained detection value by using information indicating a relationship between the measured
temperature and a correction value, the calculation unit determining drive values for the light sources based on the corrected
detection value.