| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a projecter for obtaining a constantly optimum projection image without any focus deviation even if an internal temperature increases when the power of the display is turned on in the projecter using a high-output light source lamp. <P>SOLUTION: A projection lens 10 is mounted to a support member 11a that is provided to fix space light modulation elements 14a, 14b, 14c, PBS's 13a, 13b, 13c, and a cross dichroic prism 12. A support member 11b having a larger coefficient of thermal expansion that of the support member 11a is provided between the projection lens 10 and the support member 11a to fix the projection lens 10, thus canceling out the variation of the distance between the space light modulation elements 14a, 14b, 14c and the projection lens 10 by the heat generation of the light source lamp in the projecter and a change in a usage environment temperature, and obtaining a constantly optimum projection image without any focus deviation. <P>COPYRIGHT: (C)2004,JPO</p> |
