Title:
ILLUMINATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/218921
Kind Code:
A1
Abstract:
Provided is an illumination device capable of improving light extraction efficiency. This illumination device comprises a first lens (263) and a second lens (264), and a first light-emitting element (21c) and a second light-emitting element (21d). A surface of the first lens (263) includes an emission surface (263c), an incident surface (263a), and a reflection surface (263b). First light (C1) includes second light (C1), and is incident from the first light-emitting element (21c) onto the first lens (263), is reflected by the reflection surface (263b), and is emitted from the emission surface (263c). The second light (C1) occupies 50% or more of the light incident onto the first lens (263) from the first light-emitting element (21c), and is emitted upward in the installation state of the illumination device along a direction forming 5 degrees or more with respect to the normal direction (G1) of a substrate (21b). Third light (C3, C4) which is emitted from the second light-emitting element (21d) and passes through the second lens (264) is emitted downward in the installation state of the lighting device.
Inventors:
SEKII HIROYUKI
Application Number:
PCT/JP2023/016060
Publication Date:
November 16, 2023
Filing Date:
April 24, 2023
Export Citation:
Assignee:
PANASONIC IP MAN CO LTD (JP)
International Classes:
F21S2/00; F21S8/04; F21V5/00; F21V5/08; G02B3/00; G02B5/10; F21W131/105; F21Y105/10; F21Y115/10
Foreign References:
| JP2015149188A | 2015-08-20 | |||
| JP2021082565A | 2021-05-27 |
Attorney, Agent or Firm:
HOKUTO PATENT ATTORNEYS OFFICE (JP)
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