Patent ID: 9324279
Filing Date: 2016-04-26
CPC Classification: G09G,H05B

Claim Text:
1. An illumination device comprising: a plurality of light sources which are arranged in a plane and in a matrix arrangement and which emit light according to light amount adjustment data to form planar light; a controller configured or programmed to perform correction processing on light source control data based on image data to generate the light amount adjustment data; and a plurality of temperature sensors which measure a temperature of the plurality of light sources, each of the plurality of temperature sensors being arranged in a same horizontal plane as the plurality of light sources and at a center of a region surrounded by four of the plurality of light sources, the plurality of temperature sensors being evenly distributed among the matrix arrangement of the plurality of light sources such that each of the plurality of light sources is adjacent to only one of the plurality of temperature sensors, wherein based on a measurement by the temperature measurement sensors, the controller is configured or programmed to correct variations in brightness of the plurality of light sources resulting from a temperature of the plurality of light sources on the light source control data, the controller is configured or programmed to perform, along both an X axis direction and a Y axis direction within a plane of the planar light, brightness correction processing to adjust brightness distribution of the planar light on the light source control data on which the variations in brightness of the plurality of light sources resulting from the temperature of the plurality of light sources have been corrected so as to generate intermediate light source control data, the controller further is configured or programmed to calculate a total light emission power of all the light sources based on the intermediate light source control data, and perform, when the total light emission power exceeds an allowable light emission power, light emission power correction processing to adjust the total light emission power within the allowable light emission power on the intermediate light source control data so as to generate the light amount adjustment data.