PROJECTOR DEVICE, AND DIAPHRAGM CONTROL METHOD

摘要

PROBLEM TO BE SOLVED: To ensure appropriate values of the amount of light to be output according to a video signal to be input.SOLUTION: A diaphragm control unit (155) in an image processing unit (150) restricts the quantity of light to be output according to information indicating brightness of a video signal to be input, by using a diaphragm (121). At this time, the diaphragm control unit (155) determines a region darker than predetermined brightness as a black vicinity region in an image displayed on the basis of the video signal, and adjusts opening of the diaphragm (121) according to distribution of brightness, which is corrected from degree indicating area of the black vicinity region in the video signal to a value less than the degree.