| 摘要 |
PROBLEM TO BE SOLVED: To provide a transmission type screen on which an image high in color temperature and also high in resolution is displayed while restraining the image from being deteriorated by speckles. SOLUTION: A Fresnel lens screen 20 is composed of a Fresnel lens 24 having a total reflection type light entrance surface and a first light diffusion part 26 and a first base 25 which are arranged on the succeeding stage side of the Fresnel lens. An image display element 30, which is arranged on the succeeding stage side of the Fresnel lens screen 20, is provided with a lens element 31, a second base 32 and a third base 35. A second light diffusion part 33 is arranged on the succeeding stage side of the second base 32. Two kinds of fine particles different in particle diameter are dispersed in the second light diffusion part 33. COPYRIGHT: (C)2010,JPO&INPIT
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