公开(公告)号：US20250078716A1

公开(公告)日：2025-03-06

申请号：US18808700

申请日：2024-08-19

Applicant: Japan Display Inc.

Inventor： Junji KOBASHI

IPC: G09G3/20 ,  G02F1/1334 ,  G02F1/1335 ,  G02F1/13357 ,  G09G3/36

Abstract: A display device includes: a display panel having a display area overlapping pixels; a light source device located on a lateral side of the display panel and configured to emit first light to a first side surface side of the display panel to cause the first light to travel toward a second side surface side; a reflective member located on the second side surface and configured to reflect the first light as second light from the second side surface side toward the first side surface side; and a drive circuit configured to calculate an output gradation value for each pixel based on a light quantity obtained by summing a first light quantity of the first light and a second light quantity of the second light at the pixel and an input gradation value of an image signal and apply a voltage corresponding to the output gradation value to the pixel.

公开(公告)号：US20250052937A1

公开(公告)日：2025-02-13

申请号：US18795401

申请日：2024-08-06

Applicant: Japan Display Inc. ,  OSAKA UNIVERSITY

Inventor： Koichi IGETA ,  Junji KOBASHI ,  Yasushi TOMIOKA ,  Shinichiro OKA ,  Hiroyuki YOSHIDA

IPC: G02B5/30 ,  C09K19/30 ,  C09K19/36 ,  C09K19/50

Abstract: According to one embodiment, a liquid crystal optical element includes a transparent substrate, and a liquid crystal layer which faces the transparent substrate and has a cholesteric liquid crystal and an additive exhibiting liquid crystallinity. Refractive anisotropy of the additive is less than refractive anisotropy of the liquid crystal layer.

公开(公告)号：US20220308402A1

公开(公告)日：2022-09-29

申请号：US17655676

申请日：2022-03-21

Applicant: Japan Display Inc.

Inventor： Shinichiro OKA ,  Yasushi TOMIOKA ,  Koichi IGETA ,  Junji KOBASHI

IPC: G02F1/1337 ,  G02F1/1335

Abstract: According to one embodiment, a liquid crystal optical element includes a substrate, a plurality of structures, a first liquid crystal layer including a plurality of liquid crystal molecules having alignment directions fixed, and a second liquid crystal layer including a plurality of liquid crystal molecules having alignment directions fixed. In an area overlapping a groove, a first director of the first liquid crystal layer extends along the groove, and a second director of the second liquid crystal layer is uniformly aligned with the first director of the second surface side, on the third surface side, and turns in planar view.

公开(公告)号：US20220101806A1

公开(公告)日：2022-03-31

申请号：US17550568

申请日：2021-12-14

Applicant: Japan Display Inc.

Inventor： Junji KOBASHI

IPC: G09G3/36

Abstract: According to one embodiment, a display device includes a display panel provided with a pixel and a display controller configured to drive the pixel based on a pixel signal for displaying an image in a predetermined gradation to display the image. The display controller is configured to drive the pixel with first luminance during a first subframe period of a plurality of subframe periods into which a one-frame period for displaying the image is divided and drive the pixel with second luminance during a second subframe period other than the first subframe period of the plurality of subframe periods to display the image in the predetermined gradation. A luminance difference between the first luminance and the second luminance is equal to or less than a predetermined value.

公开(公告)号：US20250063241A1

公开(公告)日：2025-02-20

申请号：US18797955

申请日：2024-08-08

Applicant: Japan Display Inc.

Inventor： Junji KOBASHI

IPC: H04N23/10 ,  H04N7/15 ,  H04N23/84

Abstract: An imaging system includes a display device that has a display panel, and an imaging device that is disposed such that the display panel is interposed between an object to be imaged and the imaging device, and takes an image of the object to be imaged, the image being transmitted through the display panel. The imaging device acquires light exposure data of a color different from a display color on the display device to generate imaging data of the object to be imaged.

公开(公告)号：US20240169949A1

公开(公告)日：2024-05-23

申请号：US18507211

申请日：2023-11-13

Applicant: Japan Display Inc.

Inventor： Junji KOBASHI

IPC: G09G3/36 ,  G02F1/1334 ,  G09G3/20

CPC classification number: G09G3/3648 ,  G02F1/1334 ,  G09G3/2007 ,  G09G2320/0233 ,  G09G2320/0271 ,  G09G2360/145

Abstract: A display device includes: a display panel including a display region overlapping pixels; a light source device disposed on a lateral side of the display panel; and a drive circuit configured to calculate an output gradation value based on an input gradation value and to output a pixel drive signal corresponding to the output gradation value to a corresponding one of the pixels. The pixels include a first pixel and a second pixel arranged in a first direction from a first side surface toward a second side surface. The second pixel is between the first pixel and the second side surface. When the input gradation value for the first pixel is equal to the input gradation value for the second pixel, the drive circuit is configured to set the output gradation value for the second pixel to be larger than the output gradation value for the first pixel.

公开(公告)号：US20240005886A1

公开(公告)日：2024-01-04

申请号：US18214667

申请日：2023-06-27

Applicant: Japan Display Inc.

Inventor： Junji KOBASHI ,  Tomoyuki ISHIHARA

IPC: G09G3/36 ,  G09G3/34

CPC classification number: G09G3/3607 ,  G09G3/3426 ,  G09G2360/16 ,  G09G2320/0233 ,  G09G2320/0646 ,  G02F1/133601

Abstract: According to an aspect, a display device includes: a display panel having a display area provided with pixels; a dimming panel disposed so as to face the display panel and having a dimming area provided with dimming pixels; and a light source configured to emit light that travels from the dimming panel toward the display panel. When a pixel among the pixels is controlled to be lit up in white, blurring processing is applied so as to cause more than one of the dimming pixels including a dimming pixel overlapping the pixel to transmit light, and light from the light source is transmitted through the blurring area and the pixel. The blurring area is determined based on a positional misalignment with respect to a predetermined positional relation between the display area and the dimming area.

公开(公告)号：US20230236416A1

公开(公告)日：2023-07-27

申请号：US18127274

申请日：2023-03-28

Applicant: Japan Display Inc.

Inventor： Tsutomu HARADA ,  Daisuke OZEKI ,  Junji KOBASHI

IPC: G02B27/01

CPC classification number: G02B27/01 ,  G02B2027/014 ,  G02B2027/0161

Abstract: According to an aspect, a head-up display device, includes: a display panel configured to display a third image that is a composite of first and second images; a parallax generator configured to generate parallax of the first image and parallax of the second image; and a projection destination part onto which projection light emitted from a display surface side of the display panel and modulated by the parallax generator is projected.

公开(公告)号：US20230039923A1

公开(公告)日：2023-02-09

申请号：US17972904

申请日：2022-10-25

Applicant: Japan Display Inc.

Inventor： Kazunari TOMIZAWA ,  Tsutomu HARADA ,  Junji KOBASHI ,  Shinichiro OKA ,  Yosuke HYODO

IPC: G02F1/1347 ,  G02F1/1335

Abstract: According to one embodiment, in a display device a first panel includes a first polarizing plate, a second polarizing plate, and a first liquid crystal panel interposed between the first polarizing plate and the second polarizing plate, a second panel includes a third polarizing plate, a fourth polarizing plate, and a second liquid crystal panel interposed between the third polarizing plate and the fourth polarizing plat, and a polarizing plate, which is located second from a surface close to an illumination device and a surface closest to an observer, has an extinction ratio that is lower than that of each of the other polarizing plates.

公开(公告)号：US20250054457A1

公开(公告)日：2025-02-13

申请号：US18793449

申请日：2024-08-02

Applicant: Japan Display Inc.

Inventor： Junji KOBASHI

IPC: G09G3/36

Abstract: A display device includes: a light source device including a first light source, a second light source, and a third light source; a display; a storage configured to store data indicating a lighting pattern of the light source device; a controller configured to control the lighting pattern based on the input data and the data. The controller is configured to produce n lighting periods during a display output period of a frame image. Colors of light from the light source device during the n lighting periods differ from one another. The data includes information indicating lighting patterns that allow different color gamuts to be reproduced in the n lighting periods. The controller is configured to control, when the color reproduction changes, the lighting pattern based on a difference between the lighting pattern for the input data before the change and the lighting pattern for the input data after the change.