Enhanced color-preference light sources

Patent metadata

Field	Value
Publication number	US-2016223146-A1
Application number	US-201414917870-A
Country	US
Kind code	A1
Filing date	Sep 9, 2014
Priority date	Sep 9, 2013
Publication date	Aug 4, 2016
Grant date	—

Abstract

Light sources that emit light having enhanced color spectrum characteristics are described. A color metric called the Lighting Preference Index (LPI) is disclosed that enables quantitative optimization of color preference by tailoring the spectral power distribution of the light source. In an embodiment, a lamp includes at least one blue light source having peak wavelength in the range of about 400 nanometer (nm) to about 460 nm, at least one green or yellow-green light source having peak wavelength in the range of about 500 nm to about 580 nm, and at least one red light source having peak wavelength in the range of about 600 nm to about 680 nm, wherein the lamp has an LPI of at least 120.

First claim

What is claimed is:

1 . A composite light source comprising:
at least one blue light source having peak wavelength in the range of about 400 nanometer (nm) to about 460 nm; at least one green or yellow-green light source having peak wavelength in the range of about 500 nm to about 580 nm; and at least one red light source having peak wavelength in the range of about 600 nm to about 680 nm; wherein the composite light source has a Lighting Preference Index (LPI) of at least 120.

2 . (canceled)

3 . The composite light source of claim 1 comprising an LPI of at least 130, wherein the at least one green or yellow-green light source has a peak wavelength of about 510 nm to about 570 nm, and the at least one red light source has a peak wavelength of about 610 nm to about 680 nm.

4 . (canceled)

5 . The composite light source of claim 1 comprising an LPI of at least 140, wherein the at least one green or yellow-green light source has a peak wavelength of about 520 nm to about 560 nm, and the at least one red light source has a peak wavelength of about 620 nm to about 680 nm.

6 . (canceled)

7 . The composite light source of claim 5 , wherein at least one of the at least one blue light source, the at least one green or yellow-green light source, and the at least one red light source comprises a solid state light source or a phosphor.

8 . The composite light source of claim 7 , wherein the solid state light source comprises at least one of a semiconductor light-emitting diode (LED) light source, an organic light-emitting diode (OLED) light source, and a polymer light-emitting diode light source.

9 . The composite light source of claim 1 having a correlated color temperature (CCT) in the range of about 2500 Kelvin (K) to about 3200 K.

10 . The composite light source of claim 1 further comprising a neodymium filter placed over the at least one blue light source, the at least one green or yellow-green light source, and the at least one red light source, such that most or all of the light emitted by the composite light source passes through the filter.

11 . A composite light source comprising:
at least one blue light source having peak wavelength in the range of about 400 nanometer (nm) to about 460 nm; at least one green or yellow-green solid state light source having peak wavelength in the range of about 500 nm to about 580 nm; and at least one red solid state light source having peak wavelength in the range of about 600 nm to about 680 nm; wherein the composite light source has a Lighting Preference Index (LPI) of at least 120.

12 . (canceled)

13 . The composite light source of claim 11 comprising an LPI of at least 130, wherein the at least one green or yellow-green solid state light source has a peak wavelength of about 510 nm to about 570 nm, and the at least one red light source has a peak wavelength of about 610 nm to about 680 nm.

14 . (canceled)

15 . The composite light source of claim 11 comprising an LPI of at least 140, wherein the at least one green or yellow-green solid state light source has a peak wavelength of about 520 nm to about 560 nm, and the at least one red solid state light source has a peak wavelength of about 620 nm to about 680 nm.

16 . (canceled)

17 . (canceled)

18 . (canceled)

19 . (canceled)

20 . A composite light source comprising:
at least one blue light source having peak wavelength in the range of about 400 nanometer (nm) to about 460 nm; at least one green or yellow-green solid state light source having peak wavelength in the range of about 500 nm to about 580 nm and having full-width-at-half-maximum (FWHM) less than 55 nm; and at least one red solid state light source having peak wavelength in the range of about 600 nm to about 680 nm and having FWHM less than 35 nm; wherein the composite light source has a Lighting Preference Index (LPI) of at least 120.

21 . (canceled)

22 . The composite light source of claim 20 comprising an LPI of at least 130, wherein the at least one green or yellow-green solid state light source has a peak wavelength of about 510 nm to about 570 nm, and the at least one red solid state light source has a peak wavelength of about 610 nm to about 680 nm.

23 . (canceled)

24 . (canceled)

25 . (canceled)

26 . (canceled)

27 . (canceled)

28 . (canceled)

29 . A composite light source comprising:
at least one blue light source having peak wavelength in the range of about 400 nanometer (nm) to about 460 nm; at least one green or yellow-green solid state light source having peak wavelength in the range of about 500 nm to about 580 nm; and at least one red down-converter having peak wavelength in the range of about 600 nm to about 680 nm; wherein the composite light source has a Lighting Preference Index (LPI) of at least 120.

30 . (canceled)

31 . The composite light source of claim 29 comprising an LPI of at least 130, wherein the at least one green or yellow-green solid state light source has a peak wavelength of about 510 nm to about 570 nm, and the at least one red down-converter has a peak wavelength of about 610 nm to about 680 nm.

32 . (canceled)

33 . (canceled)

34 . (cancelled)

35 . (cancelled)

36 . (cancelled)

37 . (cancelled)

38 . (cancelled)

39 . A composite light source comprising:
at least one blue light source having peak wavelength in the range of about 400 nanometer (nm) to about 460 nm; at least one green or yellow-green solid state light source having peak wavelength in the range of about 500 nm to about 580 nm; and at least one red down-converter having peak wavelength in the range of about 600 nm to about 680 nm and having full-width-at-half-maximum (FWHM) less than 35 nm; wherein the composite light source has a Lighting Preference Index (LPI) of at least 120.

40 . (canceled)

41 . (canceled)

42 . (canceled)

43 . (canceled)

44 . (cancelled)

45 . (cancelled)

46 . (cancelled)

47 . (cancelled)

48 . The composite light source of claim 39 further comprising a neodymium filter placed over the at least one blue light source, the at least one green or yellow-green solid state light source, and the at least one red down-converter, such that most or all of the light emitted by the composite light source passes through the filter.

49 . A composite light source comprising:
at least one blue light source having peak wavelength in the range of about 400 nanometer (nm) to about 460 nm; at least one green or yellow-green down-converter having peak wavelength in the range of about 500 nm to about 580 nm; and at least one red solid state light source having peak wavelength in the range of about 600 nm to about 680 nm; wherein the composite light source has a Lighting Preference Index (LPI) of at least 120.

50 . (canceled)

51 . (canceled)

52 . (canceled)

53 . (canceled)

54 . (cancel

Assignees

• Ge Lighting Solutions Llc

Inventors

• Vick Kevin James
• Allen Gary Robert
• Beers William Winder
• Vick Olivia Rae

Classifications

• F21V9/38

  Combination of two or more photoluminescent elements of different materials · CPC title

• H05B45/20

  Controlling the colour of the light · CPC title

• H05B45/60

  Circuit arrangements for operating LEDs comprising organic material, e.g. for operating organic light-emitting diodes [OLED] or polymer light-emitting diodes [PLED] · CPC title

• C09K11/64

  containing aluminium · CPC title

• F21K9/00

  Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers · CPC title