# US 2014/0151722 A1 · Light emitting diode (led) light source device having uniform illumination

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- Number: US 2014/0151722 A1
- Document ID: US20140151722A1
- Status: Published application
- Kind: A1
- Application number: 13/951,364
- Filed: 2013-07-25
- Published: 2014-06-05
- Earliest claimed: 2012-12-04
- Assignees: Advanced Optoelectronic Technology, Inc.
- Applicants: Advanced Optoelectronic Technology, Inc.
- Inventors: MING-TA TSAI; CHING-CHUNG CHEN
- Web page: https://patentgrep.com/patent/US20140151722A1

## CPC

- F21K 9/00: Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
- H10W 90/00: Package configurations
- 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
- H10W: GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10

## Abstract

An LED light source device includes a printed circuit board (PCB) and a plurality of LED light sources located on the PCB and electrically connected with the PCB. The plurality of LED light sources are arranged symmetrically relative to a center point of the PCB, and a distance between every adjacent two LED light sources decreases along a direction away from the center point of the PCB. An optical lens is located over the LED light sources for diverging light from a central one of the LED light sources.

## Claims

### Claim 1

An LED (light emitting diode) light source device, comprising:
a PCB (printed circuit board);
a plurality of LED light sources located on the PCB and electrically connected to the PCB;
wherein the plurality of LED light sources are arranged symmetrically relative to a center point of the PCB, and a distance between every adjacent two LED light sources decreases along a direction away from the center point of the PCB.

### Claim 2 (depends on 1)

The LED light source device of claim 1, wherein a center of one of the LED light sources is positioned at the center point of the PCB.

### Claim 3 (depends on 1)

The LED light source device of claim 1, wherein a distance between a first LED light source located at the center position of the PCB and an adjacent second LED light source is defined as H1, a distance between the second LED light source and an adjacent third LED light source is defined as H2 , and so forth, a distance between the outside LED light source and an adjacent LED light source is Hn, and H1, H2, . . . Hn meet the following relationship: H1>H2>. . .>Hn, and n is an integer greater than 1.

### Claim 4 (depends on 3)

The LED light source device of claim 3, wherein H1≧H22≧. . . ≧Hn2n−1, and n is an integer greater than 1.

### Claim 5 (depends on 2)

The LED light source device of claim 2, wherein the LED light source device further comprises an optical component located on light output paths of the plurality of LED light sources, a middle portion of the optical component is located corresponding to the center point of the PCB, the middle portion diverging light from the one of the LED light sources whose center is located at the center point of the PCB.

### Claim 6 (depends on 5)

The LED light source device of claim 5, wherein the optical component comprises a bottom surface and a top surface, the bottom surface is flat, the top surface has a middle portion and a peripheral portion surrounding the middle portion, the middle portion is located corresponding to the center point of the PCB, the middle portion of the top surface is concaved downwardly to define a concave surface.

### Claim 7 (depends on 1)

The LED light source device of claim 1, wherein the LED light source is an LED package, and comprises a substrate, an LED chip located on the substrate, a reflection cup surrounding the LED chip, and an encapsulation layer sealing the LED chip, the LED chip is electrically connected with the PCB.

### Claim 8

An LED light source device, comprising:
a PCB defining a center point;
a plurality of LED light sources located on the PCB and electrically connected to the PCB, at least one LED light source positioned at the center point of the PCB;
an optical component located on output paths of the plurality of LED light sources, a middle portion of the optical component being located corresponding to the center point of the PCB, the middle portion diverging light from the at least one LED light source;
wherein the plurality of LED light sources are arranged symmetrically on the PCB relative to the center point of the PCB, and a distance between every adjacent two LED light sources is decreasing along a direction away from the center point of the PCB, a distance between the at least one LED light source located at the center point of the PCB and an adjacent second LED light source is defined as H1, a distance between the second LED light source and an adjacent third LED light source is defined as H2, and so forth, a distance between the outmost LED light source and an adjacent LED light source is Hn, H1, H2, . . . Hn meet the following relationship: H1>H2>. . . >Hn, and n is an integer greater than 1.

### Claim 9 (depends on 8)

The LED light source device of claim 8, wherein H1≧H22≧. . . ≧Hn2n−1, and n is an integer greater than 1.

### Claim 10 (depends on 8)

The LED light source device of claim 8, wherein the optical component comprises a bottom surface and a top surface, the bottom surface is flat, the top surface has a middle portion and a peripheral portion surrounding the middle portion, the middle portion is located corresponding to the center point of the PCB, the middle portion of the top surface is concaved downwardly to define a concave surface.

### Claim 11 (depends on 8)

The LED light source device of claim 8, wherein the LED light source is an LED package, and comprises a substrate, an LED chip located on the substrate, a reflection cup surrounding the LED chip, and an encapsulation layer sealing the LED chip, the LED chip is electrically connected with the PCB.