US Patent No. 10,219,352

LIGHT-EMITTING APPARATUS AND DISPLAY APPARATUS


Patent No. 10,219,352
Issue Date February 26, 2019
Title Light-emitting Apparatus And Display Apparatus
Inventorship Hiroshi Uchiike, Fujisawa (JP)
Yasuhiro Matsuura, Yokohama (JP)
Mitsuru Tada, Machida (JP)
Assignee Canon Kabushiki Kaisha, Tokyo (JP)

Claim of US Patent No. 10,219,352

1. A light-emitting apparatus, comprising:a light source unit;
a control unit configured to control the light source unit emitting a light by controlling lighting period of the light source unit:
an optical sensor configured to acquire a light detection value corresponding to at least one of a brightness and a color of light emitted from the light source unit;
a temperature sensor disposed near the optical sensor; and
a correction unit configured to execute
a first processing to acquire a current corrected detection value by correcting a current light detection value, based on a current temperature detection value from the temperature sensor if that the lighting period of the light source unit is equal to or more than a threshold, and
a second processing to acquire a current corrected detection value, based on: 1) a past corrected detection value; 2) a past temperature detection value from the temperature sensor; and 3) the current temperature detection value from the temperature sensor if that the lighting period of the light source unit is less than the threshold.