# US 2012/0075549 A1 · White light emitting diode device, light emitting apparatus, and liquid crystal display device

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- Number: US 2012/0075549 A1
- Document ID: US20120075549A1
- Status: Published application
- Kind: A1
- Application number: 13/198,734
- Filed: 2011-08-05
- Published: 2012-03-29
- Earliest claimed: 2010-09-29
- Assignees: Au Optronics Corporation
- Inventors: Ruei-Teng Lin; Wei-Chih Ke; Chih-Lin Wang
- Web page: https://patentgrep.com/patent/US20120075549A1

## CPC

- C09K 11/77342: {Silicates}
- C09K 11/0883: {Arsenides; Nitrides; Phosphides}
- C09K 11/77348: {Silicon Aluminium Nitrides or Silicon Aluminium Oxynitrides}
- C09K 11/7774: {Aluminates}
- G02F 1/133603: {with LEDs}
- H10H 20/8513: {having two or more wavelength conversion materials}
- H10H 20/8512: {Wavelength conversion materials}
- Y02B 20/00: Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- H10H: INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- Y02B: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS

## Abstract

A white light emitting diode (LED) device includes a blue LED light source, a sealant material, a green phosphor material, and an orange phosphor material. The sealant material covers the blue LED light source. The green phosphor material distributed in the sealant material includes (Lu1-x-y-a-bYxGdy)3(Al1-zGaz)5O12:CeaPrb, wherein 0≦x≦1, 0≦y≦1, 0≦z≦0.1, 0≦a≦0.2, and 0≦b≦0.1. The orange phosphor material, which is also distributed in the sealant material, include the compound A, the compound B, or both. The compound A is (Sr1-x-y-zCaxBayMgz)2SiO4:Euw, wherein 0≦x≦1, 0≦y≦1, 0≦z≦1, and 0.03≦w≦0.2. The compound B is (M1)x(M2)y(Si,Al)12(O,N)16, wherein M1 represents Li, Mg, Ca, or Y, M2 represents Ce, Pr, Eu, Tb, Yb, or Er, 0.05≦x+y≦1.5, and 0≦y≦0.7.

## Claims

### Claim 1

A white light emitting diode device comprising:
a blue light emitting diode light source;
a sealant material covering the blue light emitting diode light source;
a green phosphor material distributed in the sealant material and comprising:
(Lu1-x-y-a-bYxGdy)3(Al1-zGaz)5O12:CeaPrb, wherein 0≦x≦1, 0≦y≦1, 0≦z≦0.1, 0≦a≦0.2, and 0≦b≦0.1;
an orange phosphor material distributed in the sealant material comprising compound A or compound B,
the compound A being (Sr1-x-y-zCaxBayMgz)2SiO4:Euw, wherein 0≦x≦1, 0≦y≦1, 0≦z≦1, and 0.03≦w≦0.2,
the compound B being (M1)x(M2)y(Si,Al)12(O,N)16, wherein M1 represents Li, Mg, Ca, or Y, M2 represents Ce, Pr, Eu, Tb, Yb, or Er, 0.05≦x+y≦1.5, and 0≦y≦0.7.

### Claim 2 (depends on 1)

The white light emitting diode device as claimed in claim 1, wherein a ratio of a total weight of the green phosphor material and the orange phosphor material to a weight of the sealant material is about 4% to about 30%.

### Claim 3 (depends on 2)

The white light emitting diode device as claimed in claim 2, wherein a weight ratio G/O of the green phosphor material to the orange phosphor material is about 1 to about 20.

### Claim 4 (depends on 1)

The white light emitting diode device as claimed in claim 1, wherein a light emission wavelength of the green phosphor material is about 525 nm to about 545 nm.

### Claim 5 (depends on 1)

The white light emitting diode device as claimed in claim 1, wherein a light emission wavelength of the orange phosphor material is about 590 nm to about 610 nm.

### Claim 6 (depends on 1)

The white light emitting diode device as claimed in claim 1, wherein a light emission wavelength of the blue light emitting diode light source is about 440 nm to about 460 nm.

### Claim 7 (depends on 1)

The white light emitting diode device as claimed in claim 1, wherein the sealant material comprises silicone or epoxy.

### Claim 8 (depends on 1)

The white light emitting diode device as claimed in claim 1, further comprising:
a carrier, the blue light emitting diode light source being configured on the carrier; and
a molding structure located on the carrier and having an accommodation space, the blue light emitting diode light source being located in the accommodation space,
wherein the accommodation space is filled with the sealant material to cover the blue light emitting diode light source.

### Claim 9 (depends on 1)

The white light emitting diode device as claimed in claim 1, wherein the green phosphor material and the orange phosphor material distributed in the sealant are evenly distributed, remotely distributed away from the blue light emitting diode light source, or conformally distributed close to the surface of the blue light emitting diode light source.

### Claim 10 (depends on 1)

A light emitting apparatus comprising:
a frame body;
at least one white light emitting diode device as claimed in claim 1 located in the frame body.

### Claim 11 (depends on 1)

A liquid crystal display comprising:
a liquid crystal display panel; and
a backlight module configured on a rear side of the liquid crystal display panel, wherein the backlight module comprises at least one white light emitting diode device as claimed in claim 1.