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US 2013/0094180 A1Published application
Coated diffuser cap for led illumination device
AssigneeTaiwan Semiconductor Manufacturing Company, Ltd.
InventorsChih-Hsuan Sun, Wei-Yu Yeh, Pei-Wen Ko, Hsueh-Hung Fu
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Abstract
The present disclosure provides an illumination device. The illumination device includes a light emitting device (LED) on a substrate. A heat sink is thermally connected to the LED device. A cap is secured over the substrate and covers the LED device. The cap includes a coating material that comprises both diffusion and reflection characteristics.
Claims20
An illumination device comprising:
- a light-emitting diode (LED) device on a substrate;
- a heat sink thermally connected to the LED device;
- a cap secured over the substrate and covering the LED device, wherein the cap includes a coating material that comprises both diffusion and reflection characteristics.
A light bulb comprising:
- a light-emitting diode (LED) device on a substrate;
- a cap secured over the substrate and covering the LED device,
- wherein the cap has a spherical shape with a relatively narrow neck portion extending towards the LED device,
- wherein a width of the cap is less than a height of the cap,
- wherein the cap includes a diffusion lens and a coating material applied to an inner surface of the diffusion lens.
- wherein the diffusion lens comprises at least one material selected from the group consisting of polycarbonate (PC) and poly methyl methacrylate (PMMA).
- wherein the coating material includes a resin mixed with TiO2.
4 more elements
A method of masking an illumination device, comprising:
- providing a diffusion lens comprising polycarbonate (PC) and/or poly methyl methacrylate (PMMA);
- coating an interior surface of the diffusion lens with a coating material comprising a mixture of resin and reflective material;
- curing the coated interior surface of the diffusion lens to form a cap;
- placing the cap over a light-emitting diode (LED) device.
1 more element
Dependencies are inferred from the claim text.