LED module and lighting apparatus

Patent metadata

Field	Value
Publication number	US-12535191-B2
Application number	US-202318158207-A
Country	US
Kind code	B2
Filing date	Jan 23, 2023
Priority date	Dec 28, 2020
Publication date	Jan 27, 2026
Grant date	Jan 27, 2026

Abstract

A light emitting diode (LED) module that is configured to emit white light is provided. The LED module includes: a blue light emitting diode configured to emit blue light having a first peak wavelength of 420 nm to 465 nm; and a near-infrared wavelength conversion material that is configured to be excited by the blue light to emit additional light having a peak wavelength in a range of 740 nm to 900 nm, and further having a full width at half maximum (FWHM) of 120 nm or less. The near-infrared wavelength conversion material includes Ca(Al 12-x-y ,Ga y )O 19 :xCr 3+ (0≤x≤1, 0≤y≤6).

First claim

What is claimed is:

1 . A light emitting diode (LED) module comprising:
a blue light emitting diode configured to emit blue light having a first peak wavelength of 420 nm to 465 nm; and a near-infrared wavelength conversion material that is configured to be excited by the blue light to emit additional light having a peak wavelength in a range of 740 nm to 900 nm, and further having a full width at half maximum (FWHM) of 120 nm or less, wherein the near-infrared wavelength conversion material comprises Ca(Al 12-x-y ,Ga y )O 19 :xCr 3+ (0≤x≤1, 0≤y≤6), and wherein, in a spectrum of light emitted from the LED module, the light has a peak intensity in the range of 740 nm to 900 nm, and the peak intensity is greater than or equal to 4.5% of a peak intensity of the blue light.

2 . The LED module of claim 1 , wherein in a spectrum of light emitted from the LED module, an integrated light amount of a visible light wavelength band of 700 nm or less is 20% or less of an integrated light amount of an entirety of the spectrum.

3 . The LED module of claim 1 , wherein in a spectrum of light emitted from the LED module, wherein an integrated light amount of a visible light wavelength band of 700 nm or less is 10% or less of an integrated light amount of an entirety of the spectrum.

4 . The LED module of claim 1 , wherein the peak wavelength of the near-infrared wavelength conversion material is in a range of 750 nm to 850 nm.

5 . The LED module of claim 1 , wherein the near-infrared wavelength conversion material further comprises at least one phosphor selected from a group consisting of Lu 3 Al 5 O 12 :Ce 3+ , Cr 3+ , La 3 MgZrO 6 :Cr 3+ , LiInSi 2 O 6 :Cr 3+ , LiZnSnO:Cr 3+ , and ScBO 3 :Cr 3+ .

6 . The LED module of claim 1 , further comprising a colored light source configured to emit colored light in a visible light wavelength band.

7 . The LED module of claim 6 , wherein the colored light source comprises a first wavelength conversion material that is configured to be excited by the blue light to emit green light having a peak wavelength in a range of 520 nm to 560 nm.

8 . The LED module of claim 7 , wherein the first wavelength conversion material comprises at least one phosphor selected from a group consisting of (Ga,Gd,Y,Lu) 3 Al 5 O 12 :Ce 3+ , La 3 Si 6 N 11 :Ce 3+ , (Sr,Ca,Ba)Si 2 O 2 N 2 :Eu 2+ , (Sr,Ba) 2 SiO 4 :Eu 2+ , and β-SiAlON:Eu 2+ .

9 . The LED module of claim 6 , wherein the colored light source comprises a second wavelength conversion material that is configured to be excited by the blue light to emit red light having a peak wavelength in a range of 600 nm to 650 nm.

10 . The LED module of claim 9 , wherein the second wavelength conversion material comprises at least one phosphor selected from a group consisting of (Sr,Ca)AlSiN 3 :Eu 2+ , CaAlSiN 3 :Eu 2+ , and K x SiF y :Mn 4+ (2≤x≤3, 4≤y≤7).

11 . The LED module of claim 6 , wherein the colored light source comprises an LED configured to emit blue, yellow, green, orange, or red light.

12 . A light emitting diode (LED) module comprising:
a blue light emitting diode configured to emit blue light having a first peak wavelength of 420 nm to 465 nm; at least one wavelength conversion material that is configured to convert a portion of the blue light into first light having a second peak wavelength in a visible light wavelength band; and a near-infrared wavelength conversion material that is configured to be excited by the blue light to emit second light having a third peak wavelength in a range of 740 nm to 900 nm, and further having a full width at half maximum (FWHM) of 120 nm or less, wherein the near-infrared wavelength conversion material comprises Ca(Al 12-x-y , Ga y )O 19 :xCr 3+ (0≤x≤1, 0≤y≤6), and wherein the first light, second light, and another portion of the blue light combine to form colored light in the visible light wavelength band, and wherein, in a spectrum of the colored light, the colored light has a peak intensity in the range of 740 nm to 900 nm, and the peak intensity is greater than or equal to 4.5% of a peak intensity of the blue light.

13 . The LED module of claim 12 , wherein the at least one wavelength conversion material comprises at least one from among a phosphor and a quantum dot.

14 . The LED module of claim 12 , wherein the at least one wavelength conversion material comprises a first wavelength conversion material that is configured to be excited by the blue light to emit the first light having a peak wavelength in a range of 520 nm to 560 nm.

15 . The LED module of claim 12 , wherein the at least one wavelength conversion material comprises a second wavelength conversion material that is configured to be excited by the blue light to emit second light having a peak wavelength in a range of 600 nm to 650 nm.

16 . A light emitting diode (LED) module comprising:
a blue light emitting diode configured to emit blue light having a first peak wavelength of 420 nm to 465 nm; and a near-infrared wavelength conversion material that is configured to be excited by the blue light to emit additional light having a peak wavelength in a range of 740 nm to 900 nm, and further having a full width at half maximum (FWHM) of 120 nm or less, wherein in a spectrum of light emitted from the LED module, wherein an integrated light amount of a visible light wavelength band of 700 nm or less is 20% or less of an integrated light amount of an entirety of the spectrum, wherein the near-infrared wavelength conversion material comprises at least one phosphor selected from a group consisting of Ca(Al 12-x-y ,Ga y )O 19 :xCr 3+ (0≤x≤1, 0≤y≤6), Lu 3 Al 5 O 12 :Ce 3+ , Cr 3+ , La 3 MgZrO 6 :Cr 3+ , LiInSi 2 O 6 :Cr 3+ , LiZnSnO:Cr 3+ , and ScBO 3 :Cr 3+ , and wherein, in the spectrum of the light emitted from the LED module, the light has a peak intensity in the range of 740 nm to 900 nm, and the peak intensity is greater than or equal to 4.5% of a peak intensity of the blue light.

17 . The LED module of claim 16 , wherein the peak wavelength of the near-infrared wavelength conversion material is in a range of 750 nm to 850 nm.

18 . The LED module of claim 16 , wherein the full width at half maximum (FWHM) of the near-infrared wavelength conversion material is 100 nm or less.

19 . The LED module of claim 16 , wherein the near-infrared wavelength conversion material further comprises Ca(Al 12-x-y ,Ga y )O 19 :xCr 3+ (0≤x≤1, 0≤y≤6).

Assignees

• Samsung Electronics Co Ltd

Inventors

• Choi Sungwoo
• Kim Seongmin
• Yun Jeongeun
• Kim Chohui
• Lee Seulgee
• Oh Jeongrok
• Yoon Chulsoo

Classifications

• F21Y2115/10

  Light-emitting diodes [LED] · CPC title

• F21Y2113/30

  of visible and non-visible spectrum · CPC title

• H10H20/8513

  having two or more wavelength conversion materials · CPC title

• H01L25/0753

  Electricity · mapped topic

• F21K9/64 Primary

  using wavelength conversion means distinct or spaced from the light-generating element, e.g. a remote phosphor layer · CPC title