公开(公告)号：US12197075B2

公开(公告)日：2025-01-14

申请号：US18415697

申请日：2024-01-18

Applicant: Japan Display Inc.

Inventor： Koji Fujisawa ,  Michihide Shibata ,  Masafumi Okada

IPC: G02F1/1335 ,  F21V8/00 ,  G02F1/13357

Abstract: In a backlight that includes a plurality of LEDs and a prism sheet disposed opposite to the LEDs, the prism sheet has a first surface opposite to the LEDs and a second surface on the opposite side of the first surface, a first prism having a first base and a first pitch L1 is formed on the first surface, a second prism having a cross section that is scalene triangular in shape having a second base having a length L2, a first base angle θ1, and a second base angle θ2 smaller than the first base angle is formed on the second surface, and L2

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：US11256024B2

公开(公告)日：2022-02-22

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：US11846415B2

公开(公告)日：2023-12-19

申请号：US17864500

申请日：2022-07-14

Applicant: Japan Display Inc.

Inventor： Michihide Shibata

IPC: F21V7/00 ,  F21V7/04 ,  F21Y115/10

CPC classification number: F21V7/005 ,  F21V7/041 ,  F21Y2115/10

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：US09581754B2

公开(公告)日：2017-02-28

申请号：US14197259

申请日：2014-03-05

Applicant: Japan Display Inc.

Inventor： Michihide Shibata

IPC: F21V8/00 ,  G02F1/1335

CPC classification number: G02B6/0055 ,  G02B6/0038

Abstract: A liquid crystal display device includes: a light guide plate that includes upper, lower and side surfaces; a light emitting element disposed to face an edge surface that is a part of the side surfaces; a reflection sheet that is bent to face the lower surface of the light guide plate and parts of the side surfaces thereof except for the edge surface; and an adhesive material disposed on the reflection sheet in a planar shape of dots or stripes and attaches the reflection sheet to the light guide plate. The lower surface of the light guide plate includes concaves and convexes formed to cause light that advances in the light guide plate to be reflected inside and to advance toward the upper surface. The thickness of the adhesive material is smaller than a maximum value of a height difference of the concaves and convexes.

Abstract translation: 液晶显示装置包括：导光板，其包括上表面，下表面和侧表面; 发光元件，设置成面对作为所述侧面的一部分的边缘表面; 弯曲成与导光板的下表面相对的反射片及其侧面的除边缘表面之外的部分; 以及将反射片设置在反射片上的点状或平面状的粘合剂材料，并将反射片附着在导光板上。 导光板的下表面包括凹陷和凸起，其形成为使得在导光板中前进的光在内部被反射并且朝向上表面前进。 粘合剂材料的厚度小于凹凸的高度差的最大值。

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：US09581851B2

公开(公告)日：2017-02-28

申请号：US14734770

申请日：2015-06-09

Applicant: Japan Display Inc.

Inventor： Hiroyuki Shimokawa ,  Michihide Shibata

IPC: G02F1/1333 ,  G02F1/1335 ,  G02F1/1339

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。