# US 10,312,419 B2 · White light emitting devices

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 10,312,419 B2
- Document ID: US10312419B2
- Status: Granted
- Kind: B2
- Application number: 15/838,594
- Filed: 2017-12-12
- Published: 2018-11-08
- Granted: 2019-06-04
- Earliest claimed: 2017-05-02
- Assignees: Samsung Electronics Co., Ltd.
- Applicants: Samsung Electronics Co., Ltd.
- Inventors: Jeong Rok Oh; Jeong Eun Yun; Sung Woo Choi; Cho Hui Kim; Chul Soo Yoon
- Web page: https://patentgrep.com/patent/US10312419B2

## CPC

- H10H 20/8513: {having two or more wavelength conversion materials}
- C09K 11/77342: {Silicates}
- C09K 11/77347: {Silicon Nitrides or Silicon Oxynitrides}
- C09K 11/77348: {Silicon Aluminium Nitrides or Silicon Aluminium Oxynitrides}
- H10H 20/8506: {Containers}
- H10H 20/8512: {Wavelength conversion materials}
- H10H 20/856: Reflecting means
- H10H 20/857: Interconnections, e.g. lead-frames, bond wires or solder balls
- H10W 90/00: Package configurations
- Y02B 20/00: Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- H10H: INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- H10W: GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
- Y02B: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS

## Abstract

A white light emitting device may include a blue light emitting diode configured to emit blue light and a plurality of wavelength conversion materials configured to convert the blue light into light having different wavelengths based on being excited by the blue light, and emit white light based on the converting, wherein the emitted white light is associated with an Illuminating Engineering Society (IES) TM-30-15 Fidelity Index (Rf) in a range of 78 to 89, an IES TM-30-15 Chroma Change by Hue Index Rcs15 in a range of 7% to 16%, and an IES TM-30-15 Chroma Change by Hue Index Rcs16 in a range of 7% to 16%, and a color difference between a reflection spectrum of a white specimen of the emitted white light, and International Commission on Illumination (CIE) Standard illuminant D65, that is equal to or less than 106.

## Claims

### Claim 1

A white light emitting device, comprising:
a blue light emitting diode configured to emit blue light; and
a plurality of wavelength conversion materials configured to
convert the emitted blue light into light having different wavelengths based on being excited by the emitted blue light, and
emit white light based on the converting the emitted blue light, such that
the emitted white light is associated with
an Illuminating Engineering Society (IES) TM-30-15 Fidelity Index (Rf) in a range of 78 to 89,
an IES TM-30-15 Chroma Change by Hue Index Rcs15 in a range of 7% to 16%, and
an IES TM-30-15 Chroma Change by Hue Index Rcs16 in a range of 7% to 16%, and
a color difference between a reflection spectrum of a white specimen of the emitted white light and International Commission on Illumination (CIE) Standard illuminant D65 is equal to or less than 106, the white specimen having a white color corresponding to Munsell N9.

### Claim 2 (depends on 1)

The white light emitting device of claim 1, wherein,
the emitted white light is associated with a preference Svp, the preference Svp defined by
Svp=−36.76+A(−5.45·10−3·A+0.915)+B(−6.69·10−4·B2+1.69·10−2·B−0.114)+C(−6.65·10−4·C2+2.27·10−2·C−0.18),
A is Rf, B is Rcs15, and C is Rcs16, and
Svp is equal to or greater than 1.3.

### Claim 3 (depends on 1)

The white light emitting device of claim 1, wherein
the emitted white light is associated with an IES TM-30-15 gamut index (Rg) equal to or greater than 110.

### Claim 4 (depends on 1)

The white light emitting device of claim 1, wherein the emitted white light is associated with a correlated color temperature (CCT) that is equal to or greater than 3300K.

### Claim 5 (depends on 1)

The white light emitting device of claim 1, wherein the emitted white light is associated with an emission spectrum having
a first peak wavelength in a range of 440 nm to 455 nm,
a second peak wavelength in a range of 530 nm to 540 nm, and
a third peak wavelength in a range of 640 nm to 650 nm.

### Claim 6 (depends on 5)

The white light emitting device of claim 5, wherein a lowest intensity of the emitted white light between the second peak wavelength and the third peak wavelength is 45% to 55% of a maximum peak intensity of the emitted white light.

### Claim 7 (depends on 5)

The white light emitting device of claim 5, wherein
a wavelength difference between a wavelength of a lowest intensity of the emitted white light between the first peak wavelength and the second peak wavelength and a wavelength of a lowest intensity of the emitted white light between the second peak wavelength and the third peak wavelength is in a range of 90 nm to 105 nm, and
the wavelength of the lowest intensity of the emitted white light between the second peak wavelength and the third peak wavelength is in a range of 570 nm to 585 nm.

### Claim 8 (depends on 1)

The white light emitting device of claim 1, wherein
a dominant wavelength band of the emitted blue light is 440 nm to 455 nm, and
the plurality of wavelength conversion materials include
a plurality of green phosphors configured to emit green light having different wavelengths, and
a plurality of red phosphors configured to emit red light having different wavelengths.

### Claim 9 (depends on 8)

The white light emitting device of claim 8, wherein the plurality of green phosphors include
a first green phosphor configured to emit first green light having a peak wavelength of 515 nm to 530 nm and a full width at half-maximum (FWHM) that is equal to or greater than 50 nm, and
a second green phosphor configured to emit second green light having a peak wavelength of 535 nm to 555 nm and a full width at half-maximum (FWHM) that is equal to or less than 70 nm.

### Claim 10 (depends on 8)

The white light emitting device of claim 8, wherein the plurality of red phosphors include
a first red phosphor configured to emit first red light having a peak wavelength of 600 nm to 620 nm and a full width at half-maximum (FWHM) equal to or less than 85 nm, and
a second red phosphor configured to emit second red light having a peak wavelength of 640 nm to 665 nm and a full width at half-maximum (FWHM) equal to or greater than 80 nm.

### Claim 11

A white light emitting device, comprising:
a blue light emitting diode configured to emit blue light;
a first wavelength conversion material configured to be excited by the blue light and emit green light; and
a second wavelength conversion material configured to be excited by the blue light and emit red light,
wherein the white light emitting device is configured to emit white light based on mixing the blue light, the green light, and the red light, the emitted white light having an emission spectrum including
a first peak wavelength in a range of 440 nm to 455 nm,
a second peak wavelength in a range of 530 nm to 540 nm, and
a third peak wavelength in a range of 640 nm to 650 nm,
wherein a lowest intensity of the emitted white light between the second peak wavelength and the third peak wavelength, the lowest intensity of the emitted white light being is 45% to 55% of a maximum peak intensity of the emitted white light among the first peak wavelength, the second peak wavelength, and the third peak wavelength,
wherein a color difference between a reflection spectrum of a white specimen of the emitted white light, and International Commission on Illumination (CIE) Standard illuminant D65, is equal to or less than 106, and the white specimen has a white color corresponding to Munsell N9.

### Claim 12 (depends on 11)

The white light emitting device of claim 11, wherein, in the emission spectrum of the white light, a wavelength difference between a wavelength of a lowest intensity of the emitted white light between the first peak wavelength and the second peak wavelength and a wavelength of a lowest intensity of the emitted white light between the second peak wavelength and the third peak wavelength is in a range of 90 nm to 105 nm.

### Claim 13 (depends on 11)

The white light emitting device of claim 11, wherein, in the emission spectrum of the emitted white light, a wavelength of the lowest intensity of the emitted white light between the second peak wavelength and the third peak wavelength is in a range of 570 nm to 585 nm.

### Claim 14 (depends on 11)

The white light emitting device of claim 11, wherein an intensity of the second peak wavelength is 55% to 70% of the maximum peak intensity of the emitted white light.

### Claim 15 (depends on 11)

The white light emitting device of claim 11, wherein
a dominant wavelength band of the blue light is 440 nm to 455 nm,
the first wavelength conversion material includes a first green phosphor configured to emit first green light having a peak wavelength of 515 nm to 530 nm and a full width at half-maximum (FWHM) that is equal to or greater than 50 nm, and a second green phosphor configured to emit second green light having a peak wavelength of 535 nm to 555 nm and a full width at half-maximum (FWHM) that is equal to or less than 70 nm, and
the second wavelength conversion material includes a first red phosphor configured to emit first red light having a peak wavelength of 600 nm to 620 nm and a full width at half-maximum (FWHM) that is equal to or less than 85 nm, and a second red phosphor configured to emit second red light having a peak wavelength of 640 nm to 665 nm and a full width at half-maximum (FWHM) that is equal to or greater than 80 nm.

### Claim 16 (depends on 15)

The white light emitting device of claim 15, wherein
the first wavelength conversion material further includes a third green phosphor configured to emit light having a peak wavelength of 490 nm to 510 nm, and
the second wavelength conversion material further includes a third red phosphor configured to emit light having a peak wavelength of 590 nm to 610 nm, shorter than the peak wavelength of the first red light.

### Claim 17

A white light emitting device, comprising:
a blue light emitting diode configured to emit blue light having a dominant wavelength band of 440 nm to 455 nm;
a first green phosphor configured to emit first green light based on being excited by the blue light, the first green light having a peak wavelength of 515 nm to 530 nm and a full width at half-maximum (FWHM) equal to or greater than 50 nm or more;
a second green phosphor configured to emit second green light based on being excited by the blue light, the second green light having a peak wavelength of 535 nm to 555 nm and a full width at half-maximum (FWHM) equal to or less than 70 nm;
a first red phosphor configured to emit first red light based on being excited by the blue light, the first red light having a peak wavelength of 600 nm to 620 nm and a full width at half-maximum (FWHM) equal to or less than 85 nm; and
a second red phosphor configured to emit second red light based on being excited by the blue light, the second red light having a peak wavelength of 640 nm to 665 nm and a full width at half-maximum (FWHM) equal to or greater than 80 nm,
wherein the white light emitting device is configured to emit white light based on mixing the blue light, the first green light, the second green light, the first red light, and the second red light,
wherein a color difference between a reflection spectrum of a white specimen of the emitted white light, and International Commission on Illumination (CIE) Standard illuminant D65, is equal to or less than 106, and
the white specimen has a white color corresponding to Munsell N9.

### Claim 18 (depends on 17)

The white light emitting device of claim 17, further comprising:
a third green phosphor configured to emit light having a peak wavelength of 490 nm to 510 nm, and
a third red phosphor configured to emit light having a peak wavelength of 590 nm to 610 nm, shorter than the peak wavelength of the first red light.

### Claim 19 (depends on 17)

The white light emitting device of claim 17, wherein
the emitted white light is associated with
an Illuminating Engineering Society (IES) TM-30-15 Fidelity Index (Rf) in a range of 78 to 89,
an IES TM-30-15 Chroma Change by Hue Index Rcs15 in a range of 7% to 16%, and
an IES TM-30-15 Chroma Change by Hue Index Rcs16 in a range of 7% to 16%, and
the emitted white light is associated with a preference Svp, the preference Svp defined by
Svp=−36.76+A(−5.45·10−3·A+0.915)+B(−6.69·10−4·B2+1.69·10−2·B−0.114)+C(−6.65·10−4·C2+2.27·10−2·C−0.18), [Equation 1]
A is Rf, B is Rcs15, and C is Rcs16, and
Svp is equal to or greater than 1.3.