Light-emitting device and lighting apparatus
AssigneePanasonic Corporation
InventorsKoji Uenoyama, Atusi Ootubo, Hiroyuki Matsumoto
Life of this patent
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Abstract
A light-emitting device includes: a board; light-emitting elements interconnected in parallel and provided above a top face of the board; light-emitting elements, one of which is connected in series with the light-emitting element and the other of which is connected in series with the light-emitting element, the light-emitting elements being interconnected in parallel; a metal pattern provided continuously under the light-emitting elements, on an undersurface of the board; and a metal pattern provided continuously under the light-emitting elements, and isolated from the first metal pattern.
Claims17
A light-emitting device comprising:
- a board;
- a first light-emitting element and a second light-emitting element interconnected in parallel and provided above a top face of the board;
- a third light-emitting element and a fourth light-emitting element, one of which is connected in series with the first light-emitting element and the other of which is connected in series with the second light-emitting element, the third light-emitting element and the fourth light-emitting element being interconnected in parallel and provided above the top face of the board;
- a first metal pattern provided continuously under the first light-emitting element and the second light-emitting element, on an undersurface of the board;
- and
- a second metal pattern provided continuously under the third light-emitting element and the fourth light-emitting element, on the undersurface of the board, and isolated from the first metal pattern.
A lighting apparatus comprising:
- a light-emitting device;
- and
- a base provided with the light-emitting device,
- the light-emitting device including:
- a board;
- a first light-emitting element and a second light-emitting element interconnected in parallel and provided above a top face of the board;
- and
- a third light-emitting element and a fourth light-emitting element, one of which is connected in series with the first light-emitting element and the other of which is connected in series with the second light-emitting element, the third light-emitting element and the fourth light-emitting element being interconnected in parallel and provided above the top face of the board,
- the base including:
- a first metal pattern provided continuously under the first light-emitting element and the second light-emitting element, on a surface with which a undersurface of the board of the light-emitting device is in contact;
- and
- a second metal pattern provided continuously under the third light-emitting element and the fourth light-emitting element, and isolated from the first metal pattern.
Dependencies are inferred from the claim text.