LED illumination device
AssigneePanasonic Electric Works Co., Ltd.
InventorsTomoki Shirakawa, Yoko Matsubayashi
Life of this patent
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Abstract
An LED illumination device includes: a substrate; one or more red LED chips arranged on the substrate; a plurality of blue LED chips arranged on the substrate; and a plurality of third-color LED chips arranged on the substrate. Respective centers of the red LED chips are arranged on a circumference of a first circle having as its center a point on the substrate, respective centers of the blue LED chips being arranged on the circumference of a second circle concentric with and greater than the first circle, respective centers of the third-color LED chips being arranged in a region between the first circle and the second circle.
Claims5
An LED illumination device comprising:
- a substrate;
- one or more red LED chips arranged on the substrate;
- a plurality of blue LED chips arranged on the substrate;
- and
- a plurality of third-color LED chips arranged on the substrate,
- wherein respective centers of the red LED chips are arranged on a circumference of a first circle having as its center a point on the substrate, respective centers of the blue LED chips being arranged on the circumference of a second circle concentric with and greater than the first circle, respective centers of the third-color LED chips being arranged in a region between the first circle and the second circle.
Dependencies are inferred from the claim text.