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公开(公告)号：US20220121032A1
公开(公告)日：2022-04-21
申请号：US17428231
申请日：2020-02-27
Inventor： Makoto SERIZAWA , Yasutoshi YAMAMOTO , Suguru OGAWA , Hiroyasu MAKINO , Yoshiichiro KASHIWAGI , Junya SUZUKI , Toshiro NISHIO , Masayuki KOZUKA
Abstract: A display device includes: a closed-bottomed first lens tube including a first display part on the closed bottom for displaying a first image; a closed-bottomed second lens tube including a second display part on the closed bottom for displaying a second image; an adjustment mechanism including an operable part that is provided between and adjusts a distance between the first and second lens tubes; and an eye cup provided for each of the first and second lens tubes that is tubular and detachably attached to the open end of the first or second lens tube. The eye cup includes: an insertion part that is tubular and inserted inside the first or second lens tube; and a cup part having a curved sheet shape that extends outside of the first or second lens tube.
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公开(公告)号：US20190259355A1
公开(公告)日：2019-08-22
申请号：US16333507
申请日：2018-02-26
Inventor： Masayuki KOZUKA , Masaya YAMAMOTO , Toshiroh NISHIO , Kazuhiko KOUNO , Yoshiichiro KASHIWAGI , Takeshi HIROTA , Hiroshi YAHATA , Yoshihiro MORI
Abstract: A video processing system includes: an acquirer that acquires video data including a main video; a format acquirer that acquires a display format that indicates a luminance dynamic range format displayable by a video display apparatus; a generator that generates first characteristics information that indicates first dynamic luminance characteristics that correspond to the display format by using the video data when a luminance dynamic range format of the main video indicated by the video data is different from the display format, the first dynamic luminance characteristics being dynamic luminance characteristics indicating a time-dependent change in luminance characteristics of the main video; and a video transmitter that outputs the first characteristics information generated by the generator.
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公开(公告)号：US20250106375A1
公开(公告)日：2025-03-27
申请号：US18730251
申请日：2023-08-30
Inventor： Hirokazu NAKANISHI , Yoshiichiro KASHIWAGI , Yoshihiro MORI , Masayuki KOZUKA
IPC: H04N13/327 , H04N13/307 , H04N13/383 , H04N13/398
Abstract: This correction method comprises: acquiring, by means of a processing circuit of a head-mounted display, projection angles via a photographic lens of dots of a correction test pattern corresponding to dots of a reference test pattern, the angle being calculated on the basis of the correction test pattern obtained by photographing the reference test pattern with the photographic lens through a correction lens that corrects the user's visual characteristics, the reference test pattern including one dot placed at a reference point and at least one dot placed on each of a plurality of straight lines extending in different directions from the reference point; and correcting, by means of the processing circuit, distortion in a virtual space image caused by the adjustment lens on the basis of projection angles corresponding to the dots of the reference test pattern.
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公开(公告)号：US20220099981A1
公开(公告)日：2022-03-31
申请号：US17426608
申请日：2020-02-27
Inventor： Yasutoshi YAMAMOTO , Suguru OGAWA , Hiroyasu MAKINO , Makoto SERIZAWA , Yoshiichiro KASHIWAGI , Toshiro NISHIO , Masayuki KOZUKA
IPC: G02B27/01
Abstract: A display device includes: a first closed-bottom lens tube including a first display part on the closed bottom for displaying a first image; a second closed-bottom lens tube including a second display part on the closed bottom for displaying a second image; an adjustment mechanism including a first rod that extends from the first lens tube and a second rod that extends from the second lens tube and is rotatably connected relative to the first rod; and an image maintainer that, in accordance with the angle of rotation of the first and second rods of the adjustment mechanism, rotates the first and second display parts relative to the first and second lens tubes to bring the horizontal directions of the first and second display parts closer to the arrangement direction of the first and second lens tubes.
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公开(公告)号：US20200236334A1
公开(公告)日：2020-07-23
申请号：US16842250
申请日：2020-04-07
Inventor： Takeshi HIROTA , Susumu MIYAJIMA , Akira YONEDA , Yoshiichiro KASHIWAGI , Toshiroh NISHIO , Masayuki KOZUKA
Abstract: A video display device includes: a video receiver that receives video data including a video and dynamic luminance characteristics indicating a time-dependent change in luminance characteristics of the video; a tone mapping processor that, in the case where a luminance region having a luminance less than or equal to a first luminance is defined as a low luminance region, and a luminance region having a luminance exceeding the first luminance is defined as a high luminance region, (i) performs first tone mapping using first conversion characteristics when first luminance characteristics exceed a predetermined threshold value, and (ii) performs second tone mapping using second conversion characteristics when the first luminance characteristics are less than or equal to the predetermined threshold value.
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Patent Agency Ranking
公开(公告)号：US20190394384A1
公开(公告)日：2019-12-26
申请号：US16333885
申请日：2018-02-26
Inventor： Masaya YAMAMOTO , Masayuki KOZUKA , Yoshiichiro KASHIWAGI , Toshiroh NISHIO , Kazuhiko KOUNO , Hiroshi YAHATA , Takeshi HIROTA , Yoshihiro MORI
IPC: H04N5/235
Abstract: A video display apparatus includes: a tone mapping processor that converts, by using dynamic metadata indicating a maximum luminance of a video in each of a plurality of time intervals included in a predetermined period, a luminance of the video in each time interval based on conversion characteristics according to the maximum luminance of the video in the time interval; and a display. The tone mapping processor switches between: a first operation of performing the tone mapping process by using first dynamic metadata that indicates the maximum luminance that is constant over the plurality of time intervals, the first dynamic metadata being generated by using static metadata that indicates a maximum luminance of the video in the predetermined period; and a second operation of performing the tone mapping process by using second dynamic metadata in which the maximum luminance varies over the plurality of time intervals.
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公开(公告)号：US20190222721A1
公开(公告)日：2019-07-18
申请号：US16331456
申请日：2018-02-26
Inventor： Masaya YAMAMOTO , Masayuki KOZUKA , Yoshiichiro KASHIWAGI , Toshiroh NISHIO , Kazuhiko KOUNO , Hiroshi YAHATA , Takeshi HIROTA , Yoshihiro MORI
CPC classification number: H04N5/20 , G06T5/009 , G06T5/20 , G06T2207/20208 , H04N5/44504 , H04N5/44543 , H04N5/66 , H04N9/793 , H04N21/431
Abstract: A video display system includes: a tone mapping processor that performs a tone mapping process of converting a luminance of a video by using conversion characteristics according to a maximum luminance of the video; and a display that displays the video that has undergone the tone mapping process. The tone mapping processor switches between a first tone mapping process of dynamically changing the conversion characteristics according to a time-dependent change in the maximum luminance of the video and a second tone mapping process that is performed using constant conversion characteristics irrespective of the time-dependent change in the maximum luminance of the video.
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公开(公告)号：US20250085543A1
公开(公告)日：2025-03-13
申请号：US18286346
申请日：2022-04-18
Inventor： Masayuki KOZUKA , Yoshihiro MORI , Junya SUZUki , Yoshiichiro KASHIWAGI , Yasutoshi YAMAMOTO , Toshiro NISHO
Abstract: A video display system includes: an observation device, a data obtainment unit that obtains data related to a movement direction of the capturing unit, and a metadata composition unit that obtains metadata based on the obtained data; and a VR device including: a reception unit that receives the metadata; an orientation estimation unit that estimates an orientation of the display device; a differential calculation unit that calculates a relative movement direction of the capturing unit based on a difference between the orientation of the display device and the movement direction of the capturing unit in the metadata; a presentation unit that presents the calculated relative movement direction to a user of a display device; a video generation unit that generates a display video; and a VR device including a display device that displays the display video.
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公开(公告)号：US20190342603A1
公开(公告)日：2019-11-07
申请号：US16349931
申请日：2018-02-26
Inventor： Takeshi HIROTA , Susumu MIYAJIMA , Akira YONEDA , Yoshiichiro KASHIWAGI , Toshiroh NISHIO , Masayuki KOZUKA
IPC: H04N21/431 , H04N5/20 , H04N5/66 , H04N5/92
Abstract: A luminance characteristics generation method includes: determining, for each of frames included in a video, a value as first luminance characteristics, the value being obtained by dividing the number of pixels having luminances less than or equal to a first luminance among all pixels included in the frame by the number of all the pixels included in the frame; and outputting the first luminance characteristics determined in the determining of the value.
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公开(公告)号：US20190251680A1
公开(公告)日：2019-08-15
申请号：US16333491
申请日：2018-02-26
Inventor： Masayuki KOZUKA , Masaya YAMAMOTO , Toshiroh NISHIO , Kazuhiko KOUNO , Yoshiichiro KASHIWAGI , Takeshi HIROTA , Hiroshi YAHATA , Yoshihiro MORI
CPC classification number: G06T5/009 , G06T5/50 , G06T11/60 , G06T2207/10016 , G06T2207/20208 , H04N5/20 , H04N5/66 , H04N21/431
Abstract: A video display apparatus includes: a video receiver that acquires video data including a main video; a generator that generates first characteristics information that indicates first dynamic luminance characteristics by using the video data when a luminance dynamic range format of the main video indicated by the video data is different from a display format that indicates a luminance dynamic range format displayable by the video display apparatus, the first dynamic luminance characteristics being dynamic luminance characteristics indicating a time-dependent change in luminance characteristics of the main video and correspond to the display format; a tone mapping processor that performs a tone mapping process of converting a luminance of the main video based on conversion characteristics according to the first dynamic luminance characteristics indicated by the first characteristics information generated by the generator; and a display that displays the main video that has undergone the tone mapping process.
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