公开(公告)号：US12298620B2

公开(公告)日：2025-05-13

申请号：US18363826

申请日：2023-08-02

Applicant: Japan Display Inc.

Inventor： Takashi Ota

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

Abstract: An object of the present invention is to provide a high-definition and high-contrast display apparatus using accurate local dimming. In achieving the object of the invention, there is provided a display apparatus including a display panel and a backlight. The backlight has a light source and an optical sheet. The light source has a light source substrate and LEDs arranged on the light source substrate. The light source is divided into segments in planar view. The segments include at least one LED each. The light source substrate and the LEDs are covered with a transparent resin. The transparent resin is overlaid with a sheet having a honeycomb partition.

公开(公告)号：US11898709B2

公开(公告)日：2024-02-13

申请号：US18099354

申请日：2023-01-20

Applicant: Japan Display Inc.

Inventor： Takashi Ota ,  Nobuyuki Suzuki ,  Makoto Hasegawa ,  Masafumi Okada

IPC: F21K9/68 ,  F21K9/69 ,  F21V7/00 ,  F21V5/04 ,  G02F1/1335 ,  F21Y115/10

CPC classification number: F21K9/68 ,  F21K9/69 ,  F21V5/04 ,  F21V7/0066 ,  F21Y2115/10 ,  G02F1/133526

Abstract: A lighting device including a first unit and a second unit, the first unit including: a first funnel shaped reflector having a first neck, a first opening, a first reflecting surface and a first light axis, a first LED emitting a first color disposed on the first neck, a first liquid crystal lens disposed at the first opening, a second unit including: a second funnel shaped reflector having a second neck, a second opening, a second reflecting surface and a second light axis, a second LED emitting a second color disposed on the second neck, a second liquid crystal lens disposed at the second opening; a length h1 of the first funnel shaped reflector is same as a length of the second funnel shaped reflector, and a diameter d1 of the first opening is same as a diameter of the second opening, and h1/d1 is two or more.