Patent ID: 8960926
Filing Date: 2015-02-24
Classification: G03B,H04N

Abstract:
1. A projector including a lamp and an optical diaphragm for adjusting an amount of light emitted from said lamp, said projector comprising: a lamp refreshing controller which, upon detecting a lighting power that lights said lamp as being lower than a rated power of said lamp for a given period of time, increases the lighting power to the rated power, and, after an elapse of a predetermined period of time, reduces the lighting power to an original level thereof; and an aperture data generator which controls an aperture of said optical diaphragm depending on a change in the lighting power to keep constant an amount of light passing through said optical diaphragm, wherein said lamp refreshing controller determines a value of the lighting power at a time that the lighting power is to be increased to the rated power, and the predetermined period of time based on a value of the lighting power and a period of time that the lamp has been lighted with the lighting power before the lighting power is to be increased to the rated power.