LED device
First Claim
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1. A LED device, comprising:
- a LED module comprising a first group of LED chips and a second group of LED chips mounted on a substrate for emitting an original light of an original spectrum;
a first fluorescent layer facing to the first group of LED chips for converting the original light to a first output light of a first spectrum;
a second fluorescent layer facing to the second group of LED chips for converting the original light to a second output light of a second spectrum;
a package housing for holding the substrate, the first fluorescent layer and the second fluorescent layer, wherein the first spectrum is partially overlapped with an excitation spectrum of the second fluorescent layer,wherein the first fluorescent layer and the second fluorescent layer have phosphor material, and the phosphor material has larger density near bottom than top in the first fluorescent layer and the second fluorescent layer.
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Abstract
A LED device includes LED chips mounted on a substrate, a first fluorescent layer, a second fluorescent layer and a package housing. The LED chips emit a blue light. The first fluorescent layer has a first side facing to the LED chips for converting the blue light to a red light. The second fluorescent layer has a first side attached to a second side of the first fluorescent layer for converting the blue light to a red light emitted from a second side of the second fluorescent layer. The package housing holds the substrate and the first fluorescent layer.
22 Citations
19 Claims
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1. A LED device, comprising:
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a LED module comprising a first group of LED chips and a second group of LED chips mounted on a substrate for emitting an original light of an original spectrum; a first fluorescent layer facing to the first group of LED chips for converting the original light to a first output light of a first spectrum; a second fluorescent layer facing to the second group of LED chips for converting the original light to a second output light of a second spectrum; a package housing for holding the substrate, the first fluorescent layer and the second fluorescent layer, wherein the first spectrum is partially overlapped with an excitation spectrum of the second fluorescent layer, wherein the first fluorescent layer and the second fluorescent layer have phosphor material, and the phosphor material has larger density near bottom than top in the first fluorescent layer and the second fluorescent layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification