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公开(公告)号：US11120760B2
公开(公告)日：2021-09-14
申请号：US17101999
申请日：2020-11-23
Inventor： Hideyuki Nakanishi , Katsuhiro Kikuchi , Takenobu Nishiguchi , Tatsuo Itoman
IPC: G09G3/36
Abstract: A liquid crystal display device includes: first and second liquid crystal panels disposed to be overlapped with each other; a parallax reduction unit that generates the second output image signal by performing smoothing processing on a first signal based on the input image signal; a first temporal filter that generates a first response correction signal determining the first output image signal based on the second output image signal; and a corrector that generates the first output image signal based on at least the first response correction signal and a second signal based on the input image signal. The first temporal filter generates the first response correction signal of a current frame based on the second output image signal of the current frame and the first response correction signal of a previous frame.
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公开(公告)号：US10789901B2
公开(公告)日：2020-09-29
申请号：US16863575
申请日：2020-04-30
Inventor： Hideyuki Nakanishi , Toshikazu Koudo , Katsuhiro Kikuchi
Abstract: A LCD device of display panels includes n-bit (n
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公开(公告)号：US11054697B2
公开(公告)日：2021-07-06
申请号：US16196633
申请日：2018-11-20
Inventor： Yoichi Yasui , Katsuhiro Kikuchi
IPC: G02F1/13357 , G02F1/1339 , G02F1/1335 , G02F1/1347 , G02F1/1333
Abstract: A liquid crystal display device includes: a first display panel including a first liquid crystal cell; and a second display panel including a second liquid crystal cell and is opposed to the first display panel. An irregularity structure having a predetermined external haze value is provided at an interface of an air layer existing between the first display panel and the second display panel.
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公开(公告)号：US10923014B2
公开(公告)日：2021-02-16
申请号：US16837744
申请日：2020-04-01
Inventor： Toshikazu Koudo , Masahiro Ishii , Katsuhiro Kikuchi , Ikuko Mori
Abstract: A liquid crystal display device comprises: a first display panel displaying a color image; a second display panel displaying a monochrome image; and an image processor generating first image data corresponding to the color image and second image data corresponding to the monochrome image based on an input video signal. The image processor generates the first image data and the second image data such that a graph representing transmittance of the first display panel for input gradation corresponding to the input video signal and a graph representing transmittance of the second display panel for the input gradation corresponding to the input video signal intersect each other at predetermined input gradation.
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公开(公告)号：US10679574B2
公开(公告)日：2020-06-09
申请号：US15942073
申请日：2018-03-30
Applicant: Panasonic Liquid Crystal Display Co., Ltd.
Inventor： Hideyuki Nakanishi , Toshikazu Koudo , Katsuhiro Kikuchi
Abstract: A LCD device of display panels includes n-bit (n
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Patent Agency Ranking
6.发明授权公开(公告)号：US10598983B2
公开(公告)日：2020-03-24
申请号：US16180431
申请日：2018-11-05
Applicant: Panasonic Liquid Crystal Display Co., Ltd.
Inventor： Yoichi Yasui , Katsuhiro Kikuchi , Kazuhiko Tsuda
IPC: G02F1/1335 , G02F1/1347
Abstract: A liquid crystal display device includes: a first polarizing plate, a first liquid crystal cell, a second polarizing plate, a third polarizing plate, a second liquid crystal cell, and a fourth polarizing plate, which are arranged from a front side to a back side in this order. P1, P2, P3, P4 represent degrees of polarization of the first polarizing plate, the second polarizing plate, the third polarizing plate, and the fourth polarizing plate, respectively, one of a relational expression of P1>P2, P3, P4, a relational expressions of P4>P1, P2, P3, and a relational expression of P1, P4>P2, P3 is satisfied.
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公开(公告)号：US10401693B2
公开(公告)日：2019-09-03
申请号：US15473111
申请日：2017-03-29
Applicant: Panasonic Liquid Crystal Display Co., Ltd.
Inventor： Katsuhiro Kikuchi , Kazuhiko Tsuda , Takao Imaoku , Yoichi Yasui
IPC: G02F1/1335 , G02F1/1347
Abstract: A liquid crystal module which is disposed opposite a backlight includes: a first liquid crystal panel which includes a pair of first transparent substrates; a second liquid crystal panel which is disposed between the backlight and the first liquid crystal panel and includes a pair of second transparent substrates; and a diffuser sheet disposed therebetween. A first transparent substrate that is closer to the diffuser sheet among the pair of first transparent substrates is thinner than a second transparent substrate that is closer to the diffuser sheet among the pair of second transparent substrates.
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公开(公告)号：US11328680B2
公开(公告)日：2022-05-10
申请号：US17096418
申请日：2020-11-12
Inventor： Hideyuki Nakanishi , Katsuhiro Kikuchi , Takenobu Nishiguchi , Tatsuo Itoman
IPC: G09G3/36
Abstract: An image processing device that generates a second output image signal output to a second liquid crystal panel that is disposed to be superposed on a first liquid crystal panel, includes: a first corrector that generates a gamma correction signal in which a gradation value of an input image signal is corrected; a detector that receives the gamma correction signal and detects an image region brighter than surroundings as a first high-frequency portion from the gamma correction signal; and a second corrector that receives the gamma correction signal and a detection result of the detector and performs correction to decrease the gradation value of the first high-frequency portion in the gamma correction signal. The second output image signal is generated based on the gamma correction signal corrected by the second corrector.
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公开(公告)号：US11170738B2
公开(公告)日：2021-11-09
申请号：US16694363
申请日：2019-11-25
Inventor： Hideyuki Nakanishi , Toshikazu Koudo , Katsuhiro Kikuchi
Abstract: A display device according to present disclosure comprising: a first display panel that displays a first image; a second display panel disposed on a back surface side of the first display panel to display a second image; and an image processor that acquires input image data and generates first image data corresponding to the first image and second image data corresponding to the second image based on the input image data, wherein the image processor includes a first filter circuit that performs first low-pass filter processing on the input image data, and the first filter circuit reduces a degree of the first low-pass filter processing when input gradation of the input image data is less than first gradation as compared with a case that the input gradation is greater than or equal to the first gradation.
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公开(公告)号：US11132967B2
公开(公告)日：2021-09-28
申请号：US16790261
申请日：2020-02-13
Inventor： Hideyuki Nakanishi , Toshikazu Koudo , Katsuhiro Kikuchi
Abstract: A liquid crystal display device having a plurality of display panels disposed in a superposed manner, comprising: a first display panel that displays a first image; a second display panel disposed on a back surface side of the first display panel to display a second image; and an image processor that generates first image data for the first image and second image data for the second image based on the input image data, wherein the image processor includes: a differential filter that performs differential filter processing on a luminance signal calculated from the input image data and outputs a differential detection value; a background level detection circuit that detects a background level using the luminance signal; a gain determination circuit that determines a filter gain using the differential detection value and the background level; and a low-pass filter that performs low-pass filter processing using the filter gain.
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