SURFACE SHAPE DIFFUSION SHEET FOR REDUCING BLACK FLOATING, REFLECTIVE SCREEN, PICTURE DISPLAY SYSTEM, AND METHOD FOR DISPLAYING PICTURE

To provide a surface shape diffusion sheet, a reflective screen, a picture display system, and a method for displaying a picture which can reduce black floating.SOLUTION: A surface shape diffusion sheet 1 includes: a surface shape anisotropic diffusion layer 2; and a substrate 3 under the surface sh...

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Hauptverfasser:	KINOSHITA HARUKI, OKAYASU TOSHIKI, SUZUKI YOSHITO, HIROTA OSAMU
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	ACCESSORIES THEREFOR APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM CINEMATOGRAPHY ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY ELECTROGRAPHY HOLOGRAPHY OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICS PHOTOGRAPHY PHYSICS PICTORIAL COMMUNICATION, e.g. TELEVISION
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Beschreibung
Zusammenfassung:	To provide a surface shape diffusion sheet, a reflective screen, a picture display system, and a method for displaying a picture which can reduce black floating.SOLUTION: A surface shape diffusion sheet 1 includes: a surface shape anisotropic diffusion layer 2; and a substrate 3 under the surface shape anisotropic diffusion layer. A diffusion angle of the surface shape anisotropic diffusion layer 2 in an in-plane vertical direction is ±14° (a half-band width), and a transmittance T in a visible light wavelength band in the substrate 3 or on the substrate 3 is in a range from 0.5 to smaller than 1. The picture display system calculates an amount of black floating, Lb (=255×[luminance of block color]/[luminance of white color]) of a picture and corrects reduction of brightness L observed in a brightness range Lb≤L