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US 2015/0308629 A1Published application
Lighting device
AssigneeEpistar Corporation
InventorsSheng-Shin Guo, Chih-Hsuan Sun, Tien-Min Lin, Wei-Yu Yeh
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Abstract
A lamp includes a substrate having a center region and a peripheral region, a first subset of light-emitting devices disposed on the center region, and a second subset of light-emitting devices disposed on the peripheral region. A temperature difference between the center region and the peripheral region is greater than 10 degrees.
Claims11
A lamp, comprising:
- a substrate having a center region and a peripheral region;
- a first subset of light-emitting devices disposed on the center region;
- and
- a second subset of light-emitting devices disposed on the peripheral region;
- wherein a temperature difference between the center region and the peripheral region is greater than 10 degrees.
2 more elements
Dependencies are inferred from the claim text.