Light sources adapted to spectral sensitivity of diurnal avians and humans

• US 9,709,228 B2
• Filed: 10/13/2014
• Issued: 07/18/2017
• Est. Priority Date: 03/17/2010
• Status: Active Grant

• Current Assignee: Signify North America Corporation (Signify N.V.)
• Original Assignee: Once Innovations Inc. (Signify N.V.)
• Inventors: Grajcar, Zdenko
• Primary Examiner(s): Mai, Anh
• Assistant Examiner(s): LEE, NATHANIEL J.
• Application Number:
  US14/512,706
• Publication Number:
  US 20150124426A1
• Time in Patent Office: 1,009 Days
• Field of Search: 119416-537, 313498-512, 362 84, 362 94
• CPC Class Codes: A01K 1/00 Housing animals; Equipment therefor
• CPC Class Codes: A01K 29/00 Other apparatus for animal husbandry
• CPC Class Codes: A01K 31/22 Poultry runs ; Poultry houses, including auxiliary features, e.g. feeding, watering, demanuring air-conditioning of poultry runs or houses A01K1/0047
• CPC Class Codes: A01K 45/00 Other aviculture appliances, e.g. devices for determining whether a bird is about to lay
• CPC Class Codes: F21S 8/006 Solar simulators, e.g. for testing photovoltaic panels
• CPC Class Codes: H05B 45/20 Controlling the colour of the light
• CPC Class Codes: H05B 45/44 with an active control inside an LED matrix

Abstract

Various apparatus and associated methods involve a light source that provides light at wavelengths that substantially correlate to local maxima in the spectral sensitivity of a diurnal avian. In an illustrative example, the light source may output light primarily in wavelength bands that are not substantially absorbed by colored oil droplets and/or visual pigment in at least one type of cone in the eye of a diurnal avian. In some embodiments, the light source may include a light-emitting diode (LED) light source. Exemplary light sources may output spectral components to illuminate diurnal avians with local maxima of intensity at wavelengths that substantially correspond to local maxima in a spectral sensitivity visual response characteristic of the diurnal avians.

Claims

1. A method of illuminating diurnal avians with artificial light sources, the method comprising:

supplying a first light having a first spectral content between 380 nm (nanometers) and 780 nm to a substantially enclosed habitat for diurnal avians;

supplying a second light having a second spectral content and having at least one local maximum in relative intensity at a wavelength at which a predetermined characteristic visual spectral response of the diurnal avian has a local maximum to a substantially enclosed habitat for diurnal avians;

wherein the at least one local maximum in relative intensity of the second spectral content is below 400 nm.

2. The method of claim 1, wherein the at least one local maximum in relative intensity of the second spectral content is among the three highest relative intensities of local maxima of the second spectral content for wavelengths between 380 nm and 780 nm.

3. The method of claim 1, wherein the at least one local maximum in relative intensity of the second spectral content is among the four highest relative intensities of local maxima of the second spectral content for wavelengths between 380 nm and 780 nm.

4. The method of claim 1, wherein the first spectral content comprises a substantially different relative intensity characteristic than the second spectral content.

5. The method of claim 1, wherein the second spectral content further comprises having at least two local maxima in relative intensity, each local maxima being at a wavelength within about 25 nm of a first and a second respective wavelengths at which the predetermined characteristic visual spectral response of the diurnal avian has distinct local maxima.

6. The method of claim 5, wherein the at least two local maxima in relative intensity of the second spectral content are among the three highest relative intensities of local maxima of the second spectral content for wavelengths between 380 nm and 780 nm.

7. The method of claim 1, wherein the second spectral content further comprises having at least three local maximum in relative intensity, each local maxima being at a wavelength within about 30 nm of a first and a second respective wavelengths at which the predetermined characteristic visual spectral response of the diurnal avian has distinct local maxima.

8. The method of claim 7, wherein the at least three local maxima in relative intensity of the second spectral content are among the four highest relative intensities of local maxima of the second spectral content for wavelengths between 380 nm and 780 nm.

9. A method of illuminating diurnal avians with artificial light sources, the method comprising:

supplying a first light having a first spectral content between 380 nm (nanometers) and 780 nm to a substantially enclosed habitat for diurnal avians;

supplying a second light having a second spectral content and having at least one local maximum in relative intensity at a wavelength at which a predetermined characteristic visual spectral response of the diurnal avian has a local maximum to a substantially enclosed habitat for diurnal avians;

wherein the at least one local maximum in relative intensity of the second spectral content is between 450 nm and 510 nm.

10. A method of illuminating diurnal avians with artificial light sources, the method comprising:

supplying a first light having a first spectral content between 380 nm (nanometers) and 780 nm to a substantially enclosed habitat for diurnal avians;

supplying a second light having a second spectral content and having at least one local maximum in relative intensity at a wavelength at which a predetermined characteristic visual spectral response of the diurnal avian has a local maximum to a substantially enclosed habitat for diurnal avians;

wherein converting the first light to a second light comprises emitting the second spectral content with a substantially red content in response to the first spectral content comprising a substantially blue content.