公开(公告)号：US20230258304A1

公开(公告)日：2023-08-17

申请号：US18136881

申请日：2023-04-20

Applicant: Japan Display Inc.

Inventor： Makoto HASEGAWA ,  Takeo KOITO ,  Nobuyuki SUZUKI ,  Masafumi OKADA

IPC: F21K9/233 ,  F21K9/61 ,  F21V8/00 ,  F21V11/06 ,  F21V14/00 ,  F21V5/00

CPC classification number: F21K9/233 ,  F21K9/61 ,  G02B6/0053 ,  G02B6/003 ,  F21V11/06 ,  F21V14/003 ,  F21V5/005 ,  F21Y2115/10

Abstract: The purpose of the present invention is to realize a lighting device of small light distribution angle and less leakage light and further to realize a lighting device in which the light beam is easy to control. The following is an example of the structure to meet the above purpose. A lighting device including: a light guide; LEDs set at a side surface of the light guide; a prism sheet set on a major surface of the light guide, in which a first louver which extends in a first direction and, a second louver which extends in an orthogonal direction to the first direction are superposed on the prism sheet.

公开(公告)号：US20230087920A1

公开(公告)日：2023-03-23

申请号：US18070820

申请日：2022-11-29

Applicant: Japan Display Inc.

Inventor： Makoto HASEGAWA ,  Nobuyuki SUZUKI ,  Masafumi OKADA

IPC: G02F1/1335 ,  G02F1/03 ,  G02F1/137

Abstract: The purpose of the present invention is to realize a lighting device of thin, low power consumption and small light distribution angle. The present invention takes the following structure to realize the above task:
A lighting device comprising:
a disc shaped light guide, having a main surface and a rear surface, including a first hole at a center,
a disc shaped reflection sheet, disposed at the rear surface side of the light guide, including a second hole at a center,
a prism sheet, disposed at the main surface side of the light guide, including a concentric first prism array,
wherein a reflection mirror is set in the first hole of the light guide at the side near to the prism sheet,
an LED is set opposing to the reflection mirror.

公开(公告)号：US20220107532A1

公开(公告)日：2022-04-07

申请号：US17553068

申请日：2021-12-16

Applicant: Japan Display Inc.

Inventor： Makoto HASEGAWA

IPC: G02F1/13357 ,  G02F1/1333 ,  G02F1/1335

Abstract: According to one embodiment, an electronic apparatus comprises a liquid crystal panel, and an illumination device that illuminates the liquid crystal panel, wherein the illumination device includes a light guide having a recess portion recessed from a first side surface toward a second side surface on the first side surface, and a third side surface exposed by the recess portion and opposed to the second side surface, a plurality of first light sources opposed to the first side surface, and a plurality of second light sources located in the recess portion and opposed to the third side surface, and each of the second light sources has a light-emitting surface smaller than that of each of the first light sources.