公开(公告)号：US20210233480A1

公开(公告)日：2021-07-29

申请号：US16750830

申请日：2020-01-23

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

Inventor： Hideyuki NAKANISHI ,  Katsuhiro KIKUCHI ,  Takenobu NISHIGUCHI ,  Tatsuo ITOMAN

IPC: G09G3/36 ,  G06T5/00 ,  G06T5/50 ,  G06T5/20

Abstract: A liquid crystal (LC) display device includes a first display panel, a second display panel, and an image processor. The image processor generates first image data and second image data that correspond to a first image and a second image for display on the first display panel and the second display panel, respectively. The image processor includes a first image data decision unit that decides the first image data, a filter that decides a correction factor, and a second image data decision unit that decides the second image data based on smoothed image data and the correction factor. A method for displaying an image in a LC display device with a first display panel and a second display panel includes determining first image data based on smoothed input image data, and determining second image data based on the smoothed input image data and a correction factor.

公开(公告)号：US20180286328A1

公开(公告)日：2018-10-04

申请号：US15942073

申请日：2018-03-30

Applicant: Panasonic Liquid Crystal Display Co., Ltd.

Inventor： Hideyuki NAKANISHI ,  Toshikazu KOUDO ,  Katsuhiro KIKUCHI

IPC: G09G3/36

Abstract: A LCD device of display panels includes n-bit (n

公开(公告)号：US20180151103A1

公开(公告)日：2018-05-31

申请号：US15821204

申请日：2017-11-22

Applicant: Panasonic Liquid Crystal Display Co., Ltd.

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

IPC: G09G3/20 ,  G09G3/36 ,  G06F3/14

CPC classification number: G09G3/2003 ,  G06F3/1446 ,  G09G3/3426 ,  G09G3/36 ,  G09G3/3607 ,  G09G3/3648 ,  G09G2300/023 ,  G09G2300/0452 ,  G09G2320/0242 ,  G09G2320/066 ,  G09G2320/0666 ,  G09G2320/0673

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：US20200175946A1

公开(公告)日：2020-06-04

申请号：US16694363

申请日：2019-11-25

Applicant: Panasonic Liquid Crystal Display Co., Ltd.

Inventor： Hideyuki NAKANISHI ,  Toshikazu KOUDO ,  Katsuhiro KIKUCHI

IPC: G09G5/14 ,  G09G5/373 ,  G06T5/20 ,  G09G5/10

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.

公开(公告)号：US20180286325A1

公开(公告)日：2018-10-04

申请号：US15900376

申请日：2018-02-20

Applicant: Panasonic Liquid Crystal Display Co., Ltd.

Inventor： Toshikazu KOUDO ,  Hideyuki NAKANISHI ,  Katsuhiro KIKUCHI

IPC: G09G3/36 ,  G06T5/00 ,  G06T5/20

CPC classification number: G09G3/36 ,  G06T5/002 ,  G06T5/20 ,  G09G3/3607 ,  G09G3/3688 ,  G09G2300/023 ,  G09G2320/0276 ,  G09G2360/04 ,  G09G2360/16

Abstract: A liquid crystal display device includes: a first display panel displaying a first image; a second display panel displaying a second image; and an image processor generating first and second image data based on input video signal. The image processor includes a first differential filtering processor, a multiplier that multiplies a grayscale of the image data subjected to the differential filtering by the first differential filtering processor by a correction coefficient, and a first smoothing processor that performs smoothing processing on image data obtained by adding the image data multiplied by the correction coefficient and the image data based on the input video signal. The image processor generates the first image data based on the image data based on the input video signal and the image data subjected to the smoothing processing, and generates the second image data based on the image data subjected to the smoothing processing.

公开(公告)号：US20180031897A1

公开(公告)日：2018-02-01

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: G02F1/1347 ,  G02F1/13363 ,  G02F1/1335

CPC classification number: G02F1/13471 ,  G02F1/133504 ,  G02F1/133512 ,  G02F1/133528 ,  G02F1/1347 ,  G02F2001/133531 ,  G02F2001/13356 ,  G02F2413/01 ,  G02F2413/05

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.

公开(公告)号：US20200258459A1

公开(公告)日：2020-08-13

申请号：US16863575

申请日：2020-04-30

Applicant: Panasonic Liquid Crystal Display Co., Ltd.

Inventor： Hideyuki NAKANISHI ,  Toshikazu KOUDO ,  Katsuhiro KIKUCHI

IPC: G09G3/36 ,  G09G3/20

Abstract: A LCD device of display panels includes n-bit (n

公开(公告)号：US20190392749A1

公开(公告)日：2019-12-26

申请号：US16562106

申请日：2019-09-05

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：US20190137817A1

公开(公告)日：2019-05-09

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

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.

公开(公告)号：US20210256924A1

公开(公告)日：2021-08-19

申请号：US16790261

申请日：2020-02-13

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

Inventor： Hideyuki NAKANISHI ,  Toshikazu KOUDO ,  Katsuhiro KIKUCHI

IPC: G09G3/36 ,  G09G5/06

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.