| 摘要 |
PROBLEM TO BE SOLVED: To always maintain an exact focus state by accurately revising the shift of the position of a focus lens caused by surrounding environmental conditions, or the like. SOLUTION: The projector apparatus is equipped with: a light source lamp 18 which is inside a reflector 17; a projection systems (14 to 16, 19 to 22) forming a light figure using a light from the light source lamp 18, projecting the formed light figure by an optical lens unit 22, having an automatic focus function and providing an image on a projection target surface position; a temperature sensor 26 for detecting the temperature of the light source lamp 18; a temperature sensor 27 for detecting the temperature of the optical lens unit 22; and a control part 28 for making the position of a focus lens 22a of the optical lens unit 22 move, according to each detection result of the temperature sensors 26 and 27, and an image location set by the automatic focus function is corrected. COPYRIGHT: (C)2009,JPO&INPIT
|
