公开(公告)号：US12019330B2

公开(公告)日：2024-06-25

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：US11852857B2

公开(公告)日：2023-12-26

申请号：US17504931

申请日：2021-10-19

Applicant: Japan Display Inc.

Inventor： Takashi Ota

IPC: F21V8/00 ,  G02F1/1335

CPC classification number: G02B6/0023 ,  G02B6/0051 ,  G02B6/0053 ,  G02B6/0073 ,  G02F1/133614

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 optical sheet group; the light source includes the 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, except the LEDs, is covered by a protective film; the segment is partitioned as by wall with the partition plate made of resin; the partition plate is disposed on the protective film.

公开(公告)号：US12282224B2

公开(公告)日：2025-04-22

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.

公开(公告)号：US11422298B2

公开(公告)日：2022-08-23

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：US11714225B2

公开(公告)日：2023-08-01

申请号：US17568086

申请日：2022-01-04

Applicant: Japan Display Inc.

Inventor： Kouji Fujisawa ,  Masahiko Kurihara ,  Takashi Ota

IPC: F21V8/00

CPC classification number: G02B6/0066

Abstract: According to an aspect, an illumination device includes: a plurality of light-emitting elements arrayed in a matrix along two directions; and a substrate on which the light-emitting elements are provided. The substrate has a plurality of partial regions. The light-emitting elements are arranged in the partial regions such that four light-emitting elements are arrayed in a two-by-two matrix along the two directions in each of the partial regions. Two light-emitting elements adjacent to each other in each of the partial regions are arranged at a first interval in one direction of the two directions. Two light-emitting elements adjacent to each other with a boundary of two partial regions adjacent to each other along the one direction interposed therebetween are arranged at a second interval in the one direction. The first interval is shorter than the second interval.

公开(公告)号：US10663645B2

公开(公告)日：2020-05-26

申请号：US16142837

申请日：2018-09-26

Applicant: Japan Display Inc.

Inventor： Toji Aoshima ,  Shiori Akamatsu ,  Takashi Ota ,  Tomohisa Onishi

IPC: F21V7/04 ,  F21V8/00

Abstract: According to one embodiment, an illumination device includes a light guide, a frame surrounding the light guide, a light emitting unit located between the light guide and the frame, and a wiring substrate electrically connected to the light emitting unit. The wiring substrate includes a convex portion projecting in a first direction as seen in plan view. The frame includes a concave portion facing the convex portion as seen in plan view. The concave portion is spaced apart from the convex portion.

公开(公告)号：US10216054B2

公开(公告)日：2019-02-26

申请号：US15654923

申请日：2017-07-20

Applicant: Japan Display Inc.

Inventor： Takashi Ota

IPC: G02F1/1362 ,  H01L51/00 ,  F21V8/00 ,  G02F1/03

Abstract: According to one embodiment, a display device includes a liquid crystal display panel and a backlight device. The backlight device includes a light guide plate opposed to the back surface of the liquid crystal display panel, and light sources opposed to a light incident surface of the light guide plate. The light guide plate includes divided light guide plates, each having a first main surface, a second main surface, the light incident surface, and side surfaces cross to the main surface and the light incident surface, and an adhesive member connecting the side surfaces of the divided light guide plates to each other and having optical properties different from optical properties of the divided light guide plates.

公开(公告)号：US11698552B2

公开(公告)日：2023-07-11

申请号：US17894249

申请日：2022-08-24

Applicant: Japan Display Inc.

Inventor： Takashi Ota

IPC: G02F1/13357 ,  G02F1/1335

CPC classification number: G02F1/133603 ,  G02F1/133607 ,  G02F1/133614

Abstract: According to one embodiment, an illumination device comprises a plurality of light emitting elements that are disposed on a main surface of a wiring board, a light diffusion distance maintaining layer, a wavelength conversion layer, and a prism sheet, wherein the main surface of the wiring board is divided into a plurality of segment regions, n (n>1) light emitting elements are provided in each of the segment regions, the light emitting elements are independently driven in units of the segment regions, and a thickness of the light diffusion distance maintaining layer is ½ times or more a pitch of the segment regions adjacent to each other.

公开(公告)号：US11460629B2

公开(公告)日：2022-10-04

申请号：US17478345

申请日：2021-09-17

Applicant: Japan Display Inc.

Inventor： Toji Aoshima ,  Shiori Akamatsu ,  Takashi Ota ,  Tomohisa Onishi

IPC: F21V8/00

Abstract: An illumination device is provided and includes a light guide; a light emitter facing the light guide; a wiring substrate provided on the light emitter and electrically connected to the light emitter; and a frame surrounding the light guide and the light emitter, wherein the wiring substrate has a first edge and a second edge which extend in a first direction, and a third edge which connects the first edge and the second edge, the frame has a fourth edge facing the third edge, the third edge and the fourth edge are spaced apart from each other and form a trench which communicates with an outside of the illumination device, and the trench has a curved portion in plan view.

公开(公告)号：US11125933B2

公开(公告)日：2021-09-21

申请号：US16876360

申请日：2020-05-18

Applicant: Japan Display Inc.

Inventor： Toji Aoshima ,  Shiori Akamatsu ,  Takashi Ota ,  Tomohisa Onishi

IPC: F21V8/00

Abstract: An illumination device is provided and includes a light guide; a light emitting unit facing the light guide; a wiring substrate provided on the light emitting unit; and a frame surrounding the light guide and the light emitting unit, wherein the wiring substrate has a first edge and a second edge which extend in the first direction, and a third edge which connects the first edge and the second edge, the frame has a fourth edge facing the third edge; the third edge and the fourth edge are spaced apart from each other and form a trench which communicates with an outside of the illumination device, and a length of the third edge and a length of the fourth edge along the trench are larger than a distance between the first edge and the second edge in a second direction intersecting the first direction.