公开(公告)号：US20190035339A1

公开(公告)日：2019-01-31

申请号：US16039440

申请日：2018-07-19

Applicant: Japan Display Inc.

Inventor： Kazuhiko SAKO ,  Daichi SUZUKI ,  Naoyuki TAKASAKI ,  Tsutomu HARADA ,  Kojiro IKEDA

IPC: G09G3/34 ,  G09G3/20

CPC classification number: G09G3/3426 ,  G09G3/2007 ,  G09G3/3648 ,  G09G2300/023 ,  G09G2300/0426

Abstract: According to an aspect, a display device includes a display panel comprising a plurality of pixels, a light guide plate, a light source configured to emit light from a lateral side of the light guide plate, a dimming panel, and a controller. The dimming panel comprises a plurality of dimming areas arranged in an emission direction of the light from the light source. The dimming areas are capable of individually changing transmittance of the light according to intensities of light required to display an image using the display panel. When adjacent two of the dimming areas differ in light transmittance from each other, the controller increases output gradation values of target pixels, the target pixels being located in a predetermined area extending from a boundary between the two dimming areas in one of the two dimming areas that has lower light transmittance.

公开(公告)号：US20250146928A1

公开(公告)日：2025-05-08

申请号：US19018010

申请日：2025-01-13

Applicant: Japan Display Inc.

Inventor： Tomoyuki ISHIHARA ,  Akihiko FUJISAWA ,  Chikyu NAKAOKA ,  Tsutomu HARADA ,  Kaoru ITO ,  Norio MAMBA

IPC: G01N21/17

Abstract: According to an aspect, a detection device includes: a plurality of photodiodes provided on a substrate; a plurality of light emitters arranged so as to face the photodiodes; and a collimating lens that is located between the photodiodes and the light emitters and is configured to emit parallel light toward the photodiodes. At least one of the light emitters is configured to be brought into a lit state and other of the light emitters are configured to be brought into an unlit state. The collimating lens is configured to emit the parallel light at a different emission angle depending on a position of the light emitter in the lit state.

公开(公告)号：US20240078965A1

公开(公告)日：2024-03-07

申请号：US18241575

申请日：2023-09-01

Applicant: Japan Display Inc.

Inventor： Kazunari TOMIZAWA ,  Kazuhiko SAKO ,  Tsutomu HARADA

IPC: G09G3/32

CPC classification number: G09G3/32 ,  G09G2300/0842 ,  G09G2310/08 ,  G09G2320/0233 ,  G09G2320/0626 ,  G09G2320/0673

Abstract: A display device includes a plurality of light-emitting elements, and a control circuit configured to control drive of the light-emitting elements. The control circuit divides one frame period into a plurality of subframe periods having different lengths and controls light emission and non-emission of the light-emitting elements for each of the subframe periods.

公开(公告)号：US20230116488A1

公开(公告)日：2023-04-13

申请号：US17959696

申请日：2022-10-04

Applicant: Japan Display Inc.

Inventor： Tomoyuki ISHIHARA ,  Tsutomu HARADA

IPC: G09G3/36 ,  G09G3/34 ,  G06F3/01

Abstract: According to an aspect, a display device includes: a first panel including pixels; a second panel including light control pixels; and a light source. When any of the pixels is controlled to transmit light in accordance with an input image signal, blurring processing is applied, a blurring area is formed, and light from the light source transmits through the blurring area and the pixel controlled to transmit light and is emitted from the first panel. When a straight line connecting a user viewpoint and the pixel controlled to transmit light has an angle relative to a normal to the first panel, a center of the blurring area is at a position shifted to a side opposite to a reference normal side relative to the normal to the first panel passing through a center of the pixel. The reference normal is a normal to the first panel passing through the viewpoint.

公开(公告)号：US20230114708A1

公开(公告)日：2023-04-13

申请号：US17960261

申请日：2022-10-05

Applicant: Japan Display Inc.

Inventor： Tsutomu HARADA ,  Tomoyuki ISHIHARA

IPC: G09G3/34 ,  G06F3/01 ,  G09G3/36

Abstract: According to an aspect, a display device includes: a first panel; a second panel disposed opposing one surface of the first panel; a light source configured to emit light to the other surface of the first panel; and an acquirer configured to acquire user information including information indicating at least one of a position of an eye and a position of a head of a user facing the second panel. The first panel includes light control pixels. The second panel includes pixels. Blurring processing is applied by which the light control pixel positioned around a pixel controlled to transmit light in accordance with an input image signal is caused to transmit light. A blurring area including the light control pixel to which the blurring processing is applied on the first panel corresponds to the position of the eye of the user or the position of the head of the user.

公开(公告)号：US20230017680A1

公开(公告)日：2023-01-19

申请号：US17947398

申请日：2022-09-19

Applicant: Japan Display Inc.

Inventor： Akihiko FUJISAWA ,  Kaoru ITO ,  Tsutomu HARADA ,  Takayuki NAKANISHI

IPC: G06F3/044 ,  G06F3/041 ,  G04G21/08

Abstract: According to one embodiment, a display device includes a display panel and a ring-shaped electrode. The display panel includes a display area for displaying an image, a plurality of first electrodes arranged to surround the display area, and at least one second electrode arranged to surround the plurality of first electrodes. The ring-shaped electrode is arranged on the display panel and is arranged at a position overlapping with the second electrode in planar view. The ring-shaped electrode includes a protruding portion overlapping with at least one of the plurality of first electrodes in planar view.

公开(公告)号：US20220351675A1

公开(公告)日：2022-11-03

申请号：US17727058

申请日：2022-04-22

Applicant: Japan Display Inc.

Inventor： Kazuhiko SAKO ,  Kazunari TOMIZAWA ,  Tsutomu HARADA

IPC: G09G3/32

Abstract: According to an aspect, a display device includes a pixel including a first sub-pixel configured to emit light having a peak in a spectrum of red, a second sub-pixel configured to emit light having a peak in a spectrum of green, and a third sub-pixel configured to emit light having a peak in a spectrum of blue. The first sub-pixel, the second sub-pixel, and the third sub-pixel are inorganic light-emitting diodes. A light emission intensity of the second sub-pixel is increased at a predetermined ratio with respect to a light emission intensity of the first sub-pixel when the first sub-pixel emits light at a light emission intensity within a low-luminance range equal to or lower than a predetermined level of luminance.

公开(公告)号：US20180047349A1

公开(公告)日：2018-02-15

申请号：US15794505

申请日：2017-10-26

Applicant: Japan Display Inc.

Inventor： Naoyuki TAKASAKI ,  Tsutomu HARADA ,  Susumu KIMURA

IPC: G09G3/34

CPC classification number: G09G3/3426 ,  G09G3/3413 ,  G09G2320/062 ,  G09G2320/0626 ,  G09G2320/0646 ,  G09G2360/16

Abstract: A display device includes an image display panel whose display is controlled by an image signal, a backlight which includes light sources and lights the image display panel from behind, and a display control section which calculates, based on the image signal, the required luminance value of the backlight for each divided area of the image display panel, calculates a tentative lighting level of each light source based on luminance distribution information for the backlight stored previously and the required luminance values, sets the lighting level of a first light source whose tentative lighting level exceeds an upper limit to the upper limit, determines the lighting level of a second light source whose tentative lighting level does not exceed the upper limit, based on the lighting level of the first light source, luminance distribution information, and required luminance value, and controls the backlight by the lighting levels.

公开(公告)号：US20170359558A1

公开(公告)日：2017-12-14

申请号：US15617468

申请日：2017-06-08

Applicant: Japan Display Inc.

Inventor： Tsutomu HARADA ,  Kazuhiko SAKO

IPC: H04N9/31 ,  G02B27/01 ,  B60K35/00

Abstract: According to one embodiment, when displaying an image on a display panel, projecting an image which is displayed on the display panel, inclining the image which is projected from the display panel at a predetermined angle of bend, and reflecting the image which is projected from the display panel via a prism and guiding the image to a projection surface, a display device corrects input picture image of the prism based on characteristics contrary to the chromatic aberration characteristics of the prism.

公开(公告)号：US20170097458A1

公开(公告)日：2017-04-06

申请号：US15283789

申请日：2016-10-03

Applicant: Japan Display Inc.

Inventor： Susumu KIMURA ,  Tsutomu HARADA ,  Akira SAKAIGAWA

IPC: F21V8/00 ,  G02F1/1335

CPC classification number: G02B6/0026 ,  G02B6/0068 ,  G02F1/133514 ,  G02F1/133603 ,  G02F2001/133614 ,  G02F2001/133624

Abstract: According to one embodiment, a light source device includes a light source element including a first light emitting element which emits light of a first wavelength and a second light emitting element which emits light of a second wavelength, a first wavelength conversion material which is excited by the light from the first light emitting element to emit light of a third wavelength, and a second wavelength conversion material which is excited by the light from the second light emitting element to emit light of a fourth wavelength, wherein cyan light produced by the light emission of the first light emitting element and magenta light produced by the light emission of the second light emitting element are emitted from the same light emitting surface.