| 摘要 |
PROBLEM TO BE SOLVED: To suppress flicker of a projection image in a projector which uses an AC-driven light source lamp. SOLUTION: In a lighting unit 50 used for the projector 10, a lamp control part 54 controls the driving frequency of the light source lamp 52 according to the driving frequency of a liquid crystal panel 32. The lamp control part 54 sets the driving frequency of the light source lamp 52 so that when the driving frequency of the liquid crystal panel 32 and the driving frequency of the light source lamp 52 can be synchronized with each other, the both are synchronized and when not, the generation frequency of the flicker of the projection image due to asynchronism between the both increases.
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