| 摘要 |
PROBLEM TO BE SOLVED: To provide a front projection screen which is used to view images on the front of the screen by projection light from a projector and also used to view the outside sceneries at the front from the back through it, and an on-board projector system. SOLUTION: This screen includes a reflection sheet 1 having a high reflection property to light in the specific wavelength range including the wavelength range of the projection light, and having a high transmissivity for the light in the wavelength range other than the above specific wavelength range, and a light diffusion sheet 3 to scatter and radiate the reflected light from the reflection sheet 1. The light diffusion sheet 3 has an area 3a to pass or transmit the incident light from the front of the screen to the back reflection sheet 1 without changing its optical characteristics, and passes or transmits the external light from the front of the screen through the area 3a of the light diffusion sheet 3 and further through the above reflection sheet 1 to make it possible to view the outside sceneries from the back of the screen. COPYRIGHT: (C)2007,JPO&INPIT
|
