| 摘要 |
PROBLEM TO BE SOLVED: To detect only an image defect caused by an optical modulation element in a projector having an illuminating light source, the optical modulation element for modulating illuminating light from the light source in response to an image signal, and a projection optical system for projecting an image modulated by the modulation element. SOLUTION: The optical modulation element 1 is moved between predetermined two points to a screen 4. Images A, B are picked up by an imaging apparatus 5 when the element is positioned at the two points, respectively. A defect pixel 12 that is not moved in the images A, B which are picked up by the apparatus at the two points, respectively, is removed as a pixel defect. Based on a remaining defect pixel 11, a pixel defect of the element is detected. COPYRIGHT: (C)2007,JPO&INPIT
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