Screen and image projection system using the same
AssigneeNaofumi Yamauchi
InventorNaofumi Yamauchi
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Abstract
In order to provide a screen having a projection surface on which of external light has little influence and has a large gain, as well as a projection surface that has a wide viewing angle and nature-views, the screen according to the present invention includes a directional diffusion layer for diffusing and transmitting light from a specific direction and linearly transmitting light from other directions, an isotropic diffusion layer for approximately isotropically diffusing light regardless of an incident angle thereof, and a light reflecting layer provided between the directional diffusion layer and the isotropic diffusion layer.
Claims19
A screen for displaying a projected optical image comprising:
- a directional diffusion layer for scattering and transmitting light whose incident angle is within a specific angle range, and linearly transmitting light whose incident angle is outside the specific angle range;
- an isotropic diffusion layer for approximately isotropically diffusing light regardless of an incident angle thereof;
- and
- a light reflecting layer provided between the directional diffusion layer and the isotropic diffusion layer.
An image projection system comprising:
- a screen;
- and
- an optical image projector for projecting an optical image onto the screen,
- wherein the screen includes:
- a directional diffusion layer for scattering and transmitting light whose incident angle is within a specific angle range, and linearly transmitting light whose incident angle is outside the specific angle range;
- an isotropic diffusion layer for approximately isotropically diffusing light regardless of an incident angle thereof;
- and a light reflecting layer provided between the directional diffusion layer and the isotropic diffusion layer.
Dependencies are inferred from the claim text.