| 摘要 |
PROBLEM TO BE SOLVED: To provide a projection type video display device that can prevent the quality of a projected video from deteriorating even in a case where environmental temperature change, wind and impact are generated.SOLUTION: A projection type video display device 100 includes: a reflection type screen sheet 1 on which an image is projected; a support plate 2 that is fixed to the back surface of the reflection type screen sheet 1; a frame-like member 3 that is fixed to the back surface peripheral edge of the support plate 2 to be integrated with the support plate 2, and has the same linear expansion coefficient as that of the support plate 2. The support plate 2 and the frame-like member 3 can be simultaneously expanded or contracted by environmental temperature change. |
