# US 12,760,849 B2 · Lighting device

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- Number: US 12,760,849 B2
- Document ID: US12760849B2
- Status: Granted
- Kind: B2
- Application number: 19/197,333
- Filed: 2025-05-02
- Published: 2025-11-27
- Granted: 2026-10-13
- Earliest claimed: 2024-05-23
- Assignees: Japan Display Inc.
- Applicants: Japan Display Inc.
- Inventors: Masato Yoshida; Hirofumi Ohira
- Web page: https://patentgrep.com/patent/US12760849B2

## CPC

- F21K 9/68: Details of reflectors forming part of the light source
- F21V 9/20: Dichroic filters, i.e. devices operating on the principle of wave interference to pass specific ranges of wavelengths while cancelling others
- F21Y 2115/10: Light-emitting diodes [LED]
- F21K: NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
- F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21Y: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED

## Abstract

According to an aspect, a lighting device includes: a light source; a surface layer provided at a position facing the light source; and a first reflective member provided between the light source and the surface layer to reflect light emitted from the light source toward the light source. The surface layer has a semi-transmissive layer and a plurality of first openings formed in the semi-transmissive layer. The first reflective member has a plurality of second openings.

## Claims

### Claim 1

A lighting device comprising:
a light source;
a surface layer provided at a position facing the light source;
a first reflective member provided between the light source and the surface layer to reflect light emitted from the light source toward the light source; and
a second reflective member disposed at such a position that the light source is interposed between the position and the first reflective member, wherein
the surface layer has a semi-transmissive layer and a plurality of first openings formed in the semi-transmissive layer,
the first reflective member has a plurality of second openings,
the second reflective member reflects second light that is the first light reflected by the first reflective member, toward a surface layer side,
the second light reflected by the second reflective member passes through the first openings and the second openings to be diffused outside, and
the second openings include:
a first part opening that overlaps one of the first openings, and
a second part opening that does not overlap one of the first openings and that overlaps the semi-transmissive layer.

### Claim 2 (depends on 1)

The lighting device according to claim 1, wherein the first reflective member has the second openings at positions overlapping the first openings and positions overlapping the semi-transmissive layer.