| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a project type video display device capable of restraining a decrease in service life of an entire projector due to a continuous operation with an optical component in a degraded state by detecting the degraded state of the optical component and resolving dissatisfaction of a user with video quality. <P>SOLUTION: An image projection section 40 of a projector 100 includes: a light source; a light modulation element which forms image light by modulating light emitted from the light source in accordance with an input image signal; a polarization element which is arranged at least either at an incident side or at a reflection side of the light modulation element and transmits light with a predetermined polarization direction; and a projection section which projects the image light formed by the light modulation element. A control section 50 detects a degraded state of the polarization element based on a projection image imaged by an imaging section 80 when a test image that shows an entire screen with monochromatic display is projected. <P>COPYRIGHT: (C)2012,JPO&INPIT |
