公开(公告)号：US11074877B1

公开(公告)日：2021-07-27

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 ,  G06T5/20 ,  G06T5/50

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：US10467968B2

公开(公告)日：2019-11-05

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

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：US10446072B2

公开(公告)日：2019-10-15

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 ,  G06F3/14 ,  G09G3/36 ,  G09G3/34

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：US10416511B2

公开(公告)日：2019-09-17

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 ,  G02F1/1335

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.