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Title:
SURFACE SHAPE DIFFUSION SHEET FOR REDUCING BLACK LEVEL DEGRADATION, REFLECTIVE SCREEN, VIDEO DISPLAY SYSTEM, AND VIDEO DISPLAY METHOD
Document Type and Number:
WIPO Patent Application WO/2024/042828
Kind Code:
A1
Abstract:
The present invention provides a surface shape diffusion sheet for reducing black level degradation, a reflective screen, a video display system, and a video display method.　A surface shape diffusion sheet 1 comprises a surface shape anisotropic diffusion layer 2 and a substrate 3 that is an underlayer for said surface shape anisotropic diffusion layer, the diffusion angle of the surface shape anisotropic diffusion layer 3 in the in-plane up-down direction is within the range of ±14° (half-width), and, inside or on the surface of the substrate 3, a transmittance T is within the range of 0.5 to less than 1 in the visible light wavelength band. The video display system calculates a black level degradation amount Lb (= 255 × black luminance / white luminance) of video, and corrects a reduction in brightness observed in the brightness range Lb ≤ L < 2Lb of a brightness L of each element of the video.

Inventors:
SUZUKI YOSHITO (JP)
HIROTA OSAMU (JP)
KINOSHITA HARUKI (JP)
OKAYASU TOSHIKI (JP)
Application Number:
PCT/JP2023/022602
Publication Date:
February 29, 2024
Filing Date:
June 19, 2023
Export Citation:
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Assignee:
YUDENSHA CO LTD (JP)
OJI HOLDINGS CORP (JP)
International Classes:
G03B21/00; G02B5/02; G03B21/14; G03B21/60; H04N5/74; H04N9/31
Foreign References:
JP2017116824A2017-06-29
JP2012103290A2012-05-31
JP2016099478A2016-05-30
JP2011128564A2011-06-30
US9057941B22015-06-16
Attorney, Agent or Firm:
OCHIAI Kenichiro (JP)
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