Title:
GRADATION CONVERTING CIRCUIT, VIDEO DISPLAY DEVICE, VIDEO DISPLAY SYSTEM, AND GRADATION CONVERSION METHOD
Document Type and Number:
WIPO Patent Application WO/2022/234689
Kind Code:
A1
Abstract:
In the present invention, a video display system including an optical system performs gradation conversion to achieve an appropriate display. A visual luminance generating unit (410) generates a visual luminance on the basis of a maximum luminance (401) of a display panel and a transmittance (402) of the optical system when a video displayed from the display panel is viewed. A system gamma generating unit (420) generates a system gamma on the basis of the visual luminance. A gradation luminance generating unit (430) generates a gradation luminance on the basis of a video signal. A system gamma superimposing unit (440) generates a multiplication factor by superimposing the system gamma onto the gradation luminance. A signal multiplying unit (450) outputs a display video signal by multiplying the video signal by the multiplication factor.
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Inventors:
NAGASE YUSUKE (JP)
YOKOYAMA KAZUKI (JP)
KON CHIAKI (JP)
YOKOYAMA KAZUKI (JP)
KON CHIAKI (JP)
Application Number:
PCT/JP2021/048943
Publication Date:
November 10, 2022
Filing Date:
December 28, 2021
Export Citation:
Assignee:
SONY SEMICONDUCTOR SOLUTIONS CORP (JP)
International Classes:
H04N5/20; G09G5/00; H04N5/66
Domestic Patent References:
| WO2019172100A1 | 2019-09-12 | |||
| WO2016079787A1 | 2016-05-26 |
Foreign References:
| JP2018093320A | 2018-06-14 | |||
| JP2013123198A | 2013-06-20 | |||
| JP2015215436A | 2015-12-03 | |||
| JP2003043408A | 2003-02-13 |
Attorney, Agent or Firm:
MARUSHIMA, Toshikazu (JP)
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