LED lamp
AssigneeRohm Co., Ltd.
InventorYusaku Kawabata
Life of this patent
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Abstract
An LED lamp A includes a plurality of LED modules 2 each including an LED chip 21, and a support member 1 including a support surface 1a on which the LED modules 2 are mounted. The LED modules 2 include a plurality of kinds of LED modules, or a first through a third LED modules 2A, 2B and 2C different from each other in directivity characteristics that represent light intensity distribution with respect to light emission directions. This arrangement ensures that the entire surrounding area can be illuminated with sufficient brightness.
Claims15
An LED lamp that is configured to be fitted to a fluorescent lighting fixture having inlet ports, the LED lamp comprising:
- a substrate including first and second ends spaced from each other in a longitudinal direction of the substrate;
- a plurality of LEDs mounted on a mount surface of the substrate;
- a light-transmitting cover covering the plurality of LEDs;
- and
- a pair of bases attached to the first and second ends of the substrate, respectively,
- wherein each of the plurality of LEDs comprises:
- a first lead;
- a second lead spaced apart from the first lead in a first direction;
- a LED chip electrically connected to the first lead and the second lead;
- a case covering the first lead and the second lead in a manner such that the first lead and the second lead include bottom surfaces, respectively, that are flush with each other and are exposed from and in direct contact with lowest surface of the case, the lowest surface being flush with the bottom surfaces of the first lead and the second lead, the case surrounding the LED chip when viewed in a second direction perpendicular to a surface of the first lead;
- and
- a transparent sealing resin filled in a space defined by the case such that the LED chip is covered by the sealing resin,
- wherein the bottom surface of the first lead has a first area when viewed in the second direction,
- wherein the first area has a first length in the first direction and a first width in a third direction perpendicular to the first and second directions, the first width being constant in the first direction,
- wherein the first length of the first area is larger than the first width of the first area,
- wherein the bottom surface of the second lead has a second width in the third direction,
- wherein a maximum width of the first width is equal to the second width, and
- wherein each of the bases includes a pair of terminals each configured to be fitted into one of the inlet ports of the fluorescent lighting fixture.
Dependencies are inferred from the claim text.