US 12,081,916 B2
Video display device and projector
Hiroshi Aoki, Kyoto (JP); Mitsuo Nakajima, Kyoto (JP); Satomi Furuhata, Kyoto (JP); Eriko Yabe, Kyoto (JP); Atsushi Kato, Kyoto (JP); and Naoya Oka, Kyoto (JP)
Assigned to Maxell, Ltd., Kyoto (JP)
Appl. No. 17/767,623
Filed by Maxell, Ltd., Kyoto (JP)
PCT Filed Oct. 10, 2019, PCT No. PCT/JP2019/040086
§ 371(c)(1), (2) Date Apr. 8, 2022,
PCT Pub. No. WO2021/070342, PCT Pub. Date Apr. 15, 2021.
Prior Publication US 2023/0051479 A1, Feb. 16, 2023
Int. Cl. H04N 9/31 (2006.01); G09G 3/00 (2006.01)
CPC H04N 9/3182 (2013.01) [G09G 3/002 (2013.01); G09G 2320/0606 (2013.01); G09G 2320/0626 (2013.01); G09G 2354/00 (2013.01)] 30 Claims
OG exemplary drawing
 
1. A video display device comprising:
a video input unit;
a first Retinex processing unit configured to perform a first Retinex process on a video inputted from the video input unit;
a second Retinex processing unit configured to perform a second Retinex process, which is different from the first Retinex process, on the video inputted from the video input unit;
a video composing unit configured to compose a video processed by the first Retinex processing unit and a video processed by the second Retinex processing unit in accordance with a feature of the video inputted from the video input unit; and
a display unit configured to display a video based on the video outputted from the video composing unit,
wherein in a process of composing the video processed by the first Retinex processing unit and the video processed by the second Retinex processing unit, the video composing unit is configured to perform a luminance level converting process of converting a luminance level for each pixel so that more output luminance levels are assigned to a luminance band having a luminance distribution larger than a flat reference luminance distribution, to improve visibility of a video, and
wherein the video composing unit is configured to change a gain of the luminance level converting process in accordance with an average pixel value level of the video inputted from the video input unit.