G - Physics – 03 – B
Patent
G - Physics
03
B
G03B 21/60 (2006.01) G02B 27/28 (2006.01)
Patent
CA 2057571
ABSTRACT OF THE DISCLOSURE A reflective type screen comprising a reflective surface layer to which an incident light containing a polarized light is irradiated and from which the reflected light having the same polarization direction as that of the incident light is irradiated to build a projected image, a polarizing plate layer located in front of said reflective surface layer and having a permeation axis extending in the same direction as the polarization direction of the incident light and a diffusion layer located in front of the polarized plate layer, wherein the reflective surface layer, the polarizing plate layer and the diffusion layer are laminated together using an adhesive to form an integral structure is disclosed. As the incident light containing a polarized light permeates through the diffusion layer, a reflection angle of the incident light is enlarged to assume such an operative state that the reflected light is expansi- vely diffused. In addition, a reflective type screen comprising a reflective surface layer subjected to mirror- surface processing and laid on a flexible substrate, a polarizer having a permeation axis extending in the same direction as the polarization direction of an incident light containing a polarized light, the incident light being reflected therefrom to build a projected image, and a diffusion layer arranged for covering the polarizer there- with, wherein the reflective surface layer, the polarizer and the diffusion layer are laminated together using an adhesive to form an integral structure is disclosed. Since the polarizer is located between the diffusion layer and the flexible substrate, the whole screen becomes flexible. Additionally, a reflective type screen comprising a polarizer having a permeation axis extending in the same direction as the polarization direction of an incident light containing a polarized light, the incident light being reflected therefrom to build a projected image, a protective layer located in front of the polarizer for protecting the polarizer and adhesively secured to the polarizer, a surface of the protective layer located on the incident side being subjected to diffusion processing, and another protective layer located behind the polarizer for protecting the polarizer and adhesively secured to the polarizer, a surface of the protective layer located on the incident side being subjected to mirror-surface processing, wherein the polarizer, the protective layer and the another protective layer are laminated together using an adhesive to form an integral structure is disclosed. The protective layer located in front of the polarizer exhibits a light diffusion function, while the protective layer located behind the polarizer exhibits a light reflection function owing to the mirror-surface processing given to the protective layer located on the rear surface side of the polarizer.
Kubota Shinji
Suzuki Teruo
Yamada Chihiko
Yoshida Tsutomu
Fetherstonhaugh & Co.
Toppan Printing Co. Ltd.
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