公开(公告)号：US20210201836A1

公开(公告)日：2021-07-01

申请号：US17101999

申请日：2020-11-23

Applicant: Panasonic Liquid Crystal Display Co., Ltd. ,  Pasona Knowledge Partner Inc.

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.

公开(公告)号：US20210193061A1

公开(公告)日：2021-06-24

申请号：US17096418

申请日：2020-11-12

Applicant: Panasonic Liquid Crystal Display Co., Ltd. ,  Pasona Knowledge Partner Inc.

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.

公开(公告)号：US20200226968A1

公开(公告)日：2020-07-16

申请号：US16837744

申请日：2020-04-01

Applicant: Panasonic Liquid Crystal Display Co., Ltd.

Inventor： Toshikazu KOUDO ,  Masahiro ISHII ,  Katsuhiro KIKUCHI ,  Ikuko MORI

IPC: G09G3/20 ,  G09G3/36 ,  G06F3/14

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.

公开(公告)号：US20190258101A1

公开(公告)日：2019-08-22

申请号：US16402017

申请日：2019-05-02

Applicant: Panasonic Liquid Crystal Display Co., Ltd.

Inventor： Yoichi YASUI ,  Takao IMAOKU ,  Katsuhiro KIKUCHI ,  Kazuhiko TSUDA

IPC: G02F1/1347 ,  G02F1/13363 ,  G02F1/1335 ,  G02F1/1368 ,  G02F1/137 ,  G02F1/1343

Abstract: A liquid crystal display device includes: a first liquid crystal cell; a second liquid crystal cell disposed in a backlight side; and a first optical sheet and a second optical sheet both having an identical layer structure. The first optical sheet is disposed on a front surface side of the first liquid crystal cell and the second optical sheet is disposed on a back surface side of the second liquid crystal cell, or vice versa.

公开(公告)号：US20190155100A1

公开(公告)日：2019-05-23

申请号：US16196633

申请日：2018-11-20

Applicant: Panasonic Liquid Crystal Display Co., Ltd.

Inventor： Yoichi YASUI ,  Katsuhiro KIKUCHI

IPC: G02F1/1335 ,  G02F1/1339

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.

公开(公告)号：US20180059465A1

公开(公告)日：2018-03-01

申请号：US15688376

申请日：2017-08-28

Applicant: Panasonic Liquid Crystal Display Co., Ltd.

Inventor： Toshikazu KOUDO ,  Masahiro ISHII ,  Katsuhiro KIKUCHI ,  Ikuko MORI

IPC: G02F1/1347 ,  G09G3/36

CPC classification number: G02F1/13471 ,  G02F2001/133531 ,  G09G3/3648 ,  G09G2300/023

Abstract: A liquid crystal display device includes: a first display panel displaying a color image; a second display panel that is disposed farther away from the observer with respect to the first display panel and displays a monochrome image; and an image processor that generates color image data and monochrome image data. The image processor includes an extension filtering unit that performs extension filtering on first monochrome image data, which is made monochrome using a maximum value in a value of each color expressing color information included in the input video signal. The extension filtering unit performs the extension filtering on the first monochrome image data using a large filter size in a larger luminance difference region, and performs the extension filtering on the first monochrome image data using a small filter size in a small luminance difference region.