PROJECTOR

摘要

A projector can prevent a flicker from being caused by rotation of a rotating phosphor plate. The projector includes a solid-state light source that emits excitation light, a rotating phosphor plate that converts the excitation light into phosphor light, a liquid-crystal light modulating device that modulates the light from the rotating phosphor plate, a projection optical system that projects the modulated light onto a screen, and a control device that controls the solid-state light source and the rotating phosphor plate so as to satisfy any one of a conditional expression A=B, a conditional expression A=2B, and a conditional expression |A−B| is greater than or equal to 20 and |A−2B| is greater than or equal to 20, where A represents a pulse width modulation control frequency in hertz of the solid-state light source and B represents a rotation frequency in hertz of the rotating phosphor plate.

主权项

1. A projector comprising:
a solid-state light source that emits excitation light; a rotating phosphor plate that converts the excitation light into phosphor light; a light modulating device that modulates the light from the rotating phosphor plate; a projection optical system that projects the light modulated by the light modulating device onto a screen; and a control device that controls the rotating phosphor plate and the light modulating device so that any one of the following conditional expressions is satisfied:
n×C=2B (n is any one of integers of 1 or more); and|(n/2)×C−B| is greater than or equal to 20 (n is any of integers of 1 or more),where B represents a rotation frequency in hertz of the rotating phosphor plate and C represents a driving frequency in hertz of the light modulating device.