# US 2012/0074444 A1 · Light emitting device and manufacturing method thereof

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- Number: US 2012/0074444 A1
- Document ID: US20120074444A1
- Status: Published application
- Kind: A1
- Application number: 13/110,005
- Filed: 2011-05-18
- Published: 2012-03-29
- Earliest claimed: 2010-09-28
- Assignees: Advanced Optoelectronic Technology, Inc.
- Inventors: YUE-ZHI CHEN; CHIA-CHEN CHANG
- Web page: https://patentgrep.com/patent/US20120074444A1

## CPC

- F21K 9/90: Methods of manufacture
- F21V 7/28: characterised by coatings
- H05K 3/281: {by means of a preformed insulating foil (H05K3/284 takes precedence)}
- H10H 20/856: Reflecting means
- F21V 7/10: Construction
- F21Y 2115/10: Light-emitting diodes [LED]
- H05K 2201/10106: Light emitting diode [LED]
- H05K 2201/2054: Light-reflecting surface, e.g. conductors, substrates, coatings, dielectrics
- H10H 20/0363: {of optical field-shaping means}
- F21K: NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
- F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H10H: INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- F21Y: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED

## Abstract

The disclosure provides a light emitting device comprising a light source and a reflector, having specular ink, surrounding the light source.

## Claims

### Claim 1

A light emitting device, comprising:
a light source of solid-state lighting; and
a reflector, surrounding the light source, comprising specular ink, the reflector reflecting light generated by the light source and radiating to the reflector.

### Claim 2 (depends on 1)

The light emitting device as claimed in claim 1, wherein the reflector comprising a transparent substrate with the specular ink coating thereon, the light radiating through the transparent substrate to reach and be reflected by the specular ink.

### Claim 3 (depends on 1)

The light emitting device as claimed in claim 1, wherein a reflective index of the specular ink is above 95%.

### Claim 4 (depends on 1)

The light emitting device as claimed in claim 1, wherein a waterproof property of the specular ink is above IPX6.

### Claim 5 (depends on 1)

The light emitting device as claimed in claim 1, wherein the light source is located on a printed circuit board (PCB) and is electrically connected thereto, and the reflector is located on the PCB.

### Claim 6 (depends on 5)

The light emitting device as claimed in claim 5, wherein the light source comprising a substrate with a reflective cup having the specular ink, a light emitting diode located on the substrate and an encapsulating layer covering the light emitting diode.

### Claim 7

A light emitting device, comprising:
a substrate, comprising a reflective cup allocated thereon;
a reflector, coating on an inner surface of the reflective cup, comprising specular ink;
a light emitting diode, located on the substrate and surrounded by the reflective cup; and
an encapsulating layer, covering the light emitting diode and surrounded by the reflective cup.

### Claim 8

A method for manufacturing a light emitting device, comprising:
providing a transparent substrate;
coating specular ink uniformly on the transparent substrate;
drying the specular ink, wherein a mirror surface attaching the transparent substrate and a fogging surface opposite to the mirror surface are provided;
cutting the transparent substrate into a plurality of reflectors;
providing a light source of solid-state lighting; and
applying the fogging surface on a determined surface of the light source to complete the light emitting device, light generated by the light source and radiating to the specular ink first running through the transparent substrate and then reflected by the specular ink to radiate out of the light emitting device.

### Claim 9 (depends on 8)

The method for manufacturing the light emitting device as claimed in claim 8, wherein the specular ink is dried by air dried, oven dried or exposed to UV light.

### Claim 10 (depends on 8)

The method for manufacturing the light emitting device as claimed in claim 8, wherein the light source includes a printed circuit board a solid-state lighting element mounted on a surface of the printed circuit board and the determined surface is the surface of the printed circuit board on which the solid-state lighting element is mounted.

### Claim 11 (depends on 8)

The method for manufacturing the light emitting device as claimed in claim 8, wherein the light source includes a reflective cup a solid-state lighting element surrounded by the reflective cup and the determined surface is an inner surface of the reflective cup of the light source.

### Claim 12 (depends on 8)

The method for manufacturing the light emitting device as claimed in claim 8, wherein the transparent substrate is made of one of following materials: polystyrene (PS), polycarbonate (PC), acrylonitrile butadiene styrene (ABS), polyethylene terephthalate (PET), polyvinyl chloride (PVC) or polymethyl methacrylate (PMMA).

### Claim 13 (depends on 8)

The method for manufacturing the light emitting device as claimed in claim 8, wherein the specular ink is made of a mixture of aluminum powder, resin, and diluents.