公开(公告)号：US20210181402A1

公开(公告)日：2021-06-17

申请号：US17184665

申请日：2021-02-25

Applicant: Japan Display Inc.

Inventor： Takashi OTA ,  Kazutaka NAGAOKA ,  Michihide SHIBATA ,  Toshihiro YAJIMA

IPC: F21V8/00 ,  H04N5/225

Abstract: According to one embodiment, an electronic device includes a liquid crystal panel and an illumination unit which illuminates the liquid crystal panel. The illumination unit includes a light guide comprising a first side surface, a main surface opposing the liquid crystal panel and an opening made by a notch or a through hole, a first light source opposing to the first side surface, and a second light source provided closer to the opening than to the first light source.

公开(公告)号：US20240288731A1

公开(公告)日：2024-08-29

申请号：US18437359

申请日：2024-02-09

Applicant: Japan Display Inc.

Inventor： Toshihiro YAJIMA ,  Michihide SHIBATA ,  Takashi OTA

IPC: G02F1/1335 ,  G02F1/13357

CPC classification number: G02F1/133614 ,  G02F1/133603 ,  G02F1/133605

Abstract: A backlight includes a light source in which blue LEDs are planarly arranged in a matrix with a first interval, and a color conversion sheet disposed covering the light source. First red quantum dots that receive blue light and emit red light, and first green quantum dots that receive blue light and emit green light are dispersed in the color conversion sheet. An RG quantum dot layer, in which second red quantum dots that receive blue light and emit red light and second green quantum dots that receive blue light and emit green light are dispersed, is disposed around each of the blue LEDs in planar view.

公开(公告)号：US20230266620A1

公开(公告)日：2023-08-24

申请号：US18309837

申请日：2023-05-01

Applicant: Japan Display Inc.

Inventor： Takashi OTA ,  Michihide SHIBATA

IPC: G02F1/13357 ,  G02F1/1335

CPC classification number: G02F1/133603 ,  G02F1/133607

Abstract: The purpose of the present invention is to realize a display device of high definition and high contrast by applying an accurate local dimming. The structure of the invention is as follows. A display device including: a display panel and a back light, in which the back light includes a light source and an optical sheet group, the light source includes a light source substrate and LEDs disposed on the light source substrate, the light source is divided into segments in a plan view, at least one of the LEDs is disposed in a segment, the light source substrate and the LEDs are covered by a transparent resin, and a groove like gap is formed in the transparent resin along a border between the segments.

公开(公告)号：US20230027041A1

公开(公告)日：2023-01-26

申请号：US17864500

申请日：2022-07-14

Applicant: Japan Display Inc.

Inventor： Michihide SHIBATA

IPC: F21V7/00 ,  F21V7/04

Abstract: The purpose is to realize a lighting device of thin, small light distribution angle and high intensity illumination. The invention is: a lighting device, which emits light in a direction perpendicular to a normal surface, including: light source units, disposed radially with a certain azimuth with respect to a center of the lighting device, each of the light source units, having an optical axis parallel to the major surface, and emitting light toward the center of the lighting device, each of the light source units including a funnel shaped reflector, which has an opening and a neck, and an LED light source disposed at the neck, mirrors disposed opposing to the openings of the light source units, in which the mirrors reflect light emitted from the light source units to the direction perpendicular to the major surface.

公开(公告)号：US20250102862A1

公开(公告)日：2025-03-27

申请号：US18975169

申请日：2024-12-10

Applicant: Japan Display Inc.

Inventor： Toshihiro YAJIMA ,  Michihide SHIBATA ,  Takashi OTA

IPC: G02F1/13357

Abstract: The objective is to reduce yellow shift around a blue LED in a backlight using the blue LED and a color conversion sheet. To solve this problem, one of the structures of invention is: a display device including a display panel and a backlight, the backlight having a plurality of LEDs arranged on a substrate and a color conversion sheet arranged between the plurality of LEDs and the display panel, the color conversion sheet being formed of color conversion material and a binder, the color conversion sheet having a ring-shaped area without the color conversion material, the ring-shaped area surrounding each of the plurality of LEDs in a plan view.

公开(公告)号：US20150362775A1

公开(公告)日：2015-12-17

申请号：US14734770

申请日：2015-06-09

Applicant: Japan Display Inc.

Inventor： Hiroyuki SHIMOKAWA ,  Michihide SHIBATA

IPC: G02F1/1333 ,  G02F1/1335

CPC classification number: G02F1/133512 ,  G02F1/133308 ,  G02F1/1336 ,  G02F1/1339 ,  G02F2001/133314 ,  G02F2201/50

Abstract: In order to avoid a phenomenon that a liquid crystal display panel peeling off from a mold caused by expansion of the air inside the mold when attaching a touch panel to the liquid crystal display panel in a decompressed atmosphere, there is provided a liquid crystal display device in which a liquid crystal display panel is attached to a mold accommodating a backlight by a light shielding tape and a touch panel is attached to the liquid crystal display panel, wherein the light shielding tape includes adhesives on the both sides of a black base, and the light shielding tape has a portion without the adhesive on one side of the tape for a predetermined length of the light shielding tape in a circumferential direction.

Abstract translation: 为了避免在减压气氛中将触摸面板附着在液晶显示面板上时由模具内的空气膨胀引起的液晶显示面板剥离的现象，提供了一种液晶显示装置 其中液晶显示面板通过遮光带安装在容纳背光的模具上，并且触摸面板安装在液晶显示面板上，其中遮光带包括黑底两侧的粘合剂，以及 遮光带在圆周方向上具有预定长度的遮光带的带的一侧上没有粘合剂的部分。

公开(公告)号：US20240421265A1

公开(公告)日：2024-12-19

申请号：US18673352

申请日：2024-05-24

Applicant: Japan Display Inc.

Inventor： Toshihiro YAJIMA ,  Michihide SHIBATA ,  Takashi OTA

IPC: H01L33/50 ,  G02F1/13357 ,  H01L25/075

Abstract: The purpose is to reduce a color shift around an ultraviolet LED in a backlight using the ultraviolet LED and a QD sheet, viewed in a plane. The structure is: A display device having a display panel and a backlight, the backlight including a light source in which ultraviolet LEDs are arranged in a plane and in a matrix with a first interval, and a QD sheet covering the light source; the QD sheet being dispersed with red quantum dots, green quantum dots, and blue quantum dots, emitting light in response to ultraviolet light, the QD sheet having a first region and a second region arranged in a ring shape to surround the ultraviolet LED in a plan view, more of the red quantum dots, the green quantum dots, or the blue quantum dots being dispersed in the second region than in the first region.

公开(公告)号：US20210311245A1

公开(公告)日：2021-10-07

申请号：US17219881

申请日：2021-04-01

Applicant: Japan Display Inc.

Inventor： Makoto HASEGAWA ,  Nobuyuki SUZUKI ,  Michihide SHIBATA

IPC: F21V8/00 ,  G02F1/1335

Abstract: According to one embodiment, an electronic equipment includes a liquid crystal panel, an illumination device, and a light receiving element. The illumination device includes a first light guide which includes a first opening, a first light source, a second light guide including a first area, a second area, a first main surface, a second main surface, a first side surface, a second side surface, and a continuous surface, a second light source opposed to each of the continuous surface and the second side surface, and a light reflective layer covering each of the continuous surface and the first side surface.

公开(公告)号：US20250110370A1

公开(公告)日：2025-04-03

申请号：US18888357

申请日：2024-09-18

Applicant: Japan Display Inc.

Inventor： Takashi OTA ,  Michihide SHIBATA ,  Toshihiro YAJIMA

IPC: G02F1/13357 ,  G02F1/1335

Abstract: A task of the present invention is to realize a display device with high definition and high contrast by means of local dimming. The configuration is as follows. A liquid crystal display device including a display panel and a back light, the back light having a light source and a group of optical sheets, the light source including a light source substrate and LEDs arranged on the light source substrate, the light source being divided into segments in a plan view, the segment including at least one LED, characterized in that the segment is surrounded by a stacked structure of a lower reflection wall and an upper reflection wall.

公开(公告)号：US20250068011A1

公开(公告)日：2025-02-27

申请号：US18796391

申请日：2024-08-07

Applicant: Japan Display Inc.

Inventor： Takashi OTA ,  Michihide SHIBATA ,  Nobuyuki SUZUKI ,  Masafumi OKADA

IPC: G02F1/1335 ,  G02F1/13357

Abstract: A backlight includes: a light source capable of emitting light spreading in first and second directions perpendicular to each other, from an optical axis; a first cylindrical lens that refracts and brings the light closer along the first direction to the optical axis, the first cylindrical lens overlapping with the light source in a third direction perpendicular to the first and second directions; a second cylindrical lens that refracts and brings the light even closer along the first direction to the optical axis, the second cylindrical lens overlapping with the light source and the first cylindrical lens in the third direction; and a reflector that reflects and brings the light closer along the second direction to the optical axis, the reflector being positioned between the first cylindrical lens and the second cylindrical lens in the third direction, the reflector avoiding overlap with the light source.