Light emitting device
First Claim
1. A light-emitting device, comprising:
- an LED light source; and
a light diffusion element covering at least a part of the LED light source,wherein the light diffusion element comprises a single layer formed by blending a first polymer having a first crystal diameter and a second polymer having a second crystal diameter smaller than the first crystal diameter, and then molding the blend, such that the first polymer and the second polymer are evenly blended in the single layer, and the first polymer directly physically contacts the second polymer,wherein the first polymer comprises polypropylene or ethylene-propylene copolymer, andwherein the second polymer comprises polyethylene, polypropylene, or ethylene-propylene copolymer.
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Accused Products
Abstract
Disclosed is a light-emitting device, including an LED light source and a light diffusion element. The light diffusion element, covering at least a part of the LED light source, is composed of a first polymer, a second polymer, or a blend of them. The first polymer has a larger crystal diameter than that of the second polymer. The first polymer is made of polypropylene or ethylene-propylene copolymer. The second polymer is made of polyethylene, polypropylene, or ethylene-propylene copolymer. A blend of certain ratios of the first and second polymer gives rise of an excellent material that has improved light diffusion. This material can be widely adopted to current light fixtures for its evenly distributed lighting and great brightness.
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Citations
20 Claims
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1. A light-emitting device, comprising:
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an LED light source; and a light diffusion element covering at least a part of the LED light source, wherein the light diffusion element comprises a single layer formed by blending a first polymer having a first crystal diameter and a second polymer having a second crystal diameter smaller than the first crystal diameter, and then molding the blend, such that the first polymer and the second polymer are evenly blended in the single layer, and the first polymer directly physically contacts the second polymer, wherein the first polymer comprises polypropylene or ethylene-propylene copolymer, and wherein the second polymer comprises polyethylene, polypropylene, or ethylene-propylene copolymer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A light-emitting device, comprising:
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an LED light source; and a light diffusion element covering at least a part of the LED light source, wherein the light diffusion element comprises a single layer formed by blending a first polymer having a first crystal diameter and a second polymer having a second crystal diameter smaller than the first crystal diameter, and then molding the blend without a carrier, such that the first polymer and the second polymer are evenly blended in the single layer, wherein the first polymer comprises polypropylene or ethylene-propylene copolymer, and wherein the second polymer comprises polyethylene, polypropylene, or ethylene-propylene copolymer. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification