Patent ID: 7940013
Filing Date: 2011-05-10
Classification: G02F,G09G,H05B

Abstract:
1. A lighting apparatus comprising: a plurality of light emitters to illuminate an illuminated member; light amount controller to control individually an amount of light emitted by each of the light emitters; a plurality of light amount detectors to detect respectively amounts of light received on different portions of the illuminated member; light amount determination section to determine a correlation between the detected amounts of light received on the different portions of the illuminated member; and memory to store relationship information on a relationship between variations in the amount of light emitted by each of the light emitters and variations in an amount of light received on each of the different portions of the illuminated member, wherein the relationship information indicates how variations in the amount of light emitted by each of the light emitters affect the amount received on each of the different portions of the illuminated member as detected by the light amount detectors, and wherein the light amount controller is operable to monitor a result of determination by the light amount determination section, and to control individually, based on the relationship information, the amount of light emitted by each of the light emitters so that the amounts of light received on the different portions of the illuminated member are substantially even.