LED lamp for producing biologically-corrected light
First Claim
Patent Images
1. A biologically-corrected light-emitting diode (LED) lamp, comprising:
- a housing;
a driver circuit disposed within the housing;
a plurality of LED chips electrically coupled to and driven by the driver circuit, wherein the plurality of LED chips produce a light output; and
an optic element operable to receive light from the plurality of LED chips, wherein the optic element has a color filter applied thereto, wherein the color filter is configured to increase spectral opponency to thereby decrease a biological effect of the light output of the plurality of LED chips, and wherein the color filter has a total transmission of about 75%.
7 Assignments
0 Petitions
Accused Products
Abstract
A light-emitting diode (LED) lamp for producing a biologically-corrected light. In one embodiment, the LED lamp includes a color filter, which modifies the light produced by the lamp'"'"'s LED chips, to increase spectral opponency and minimize melatonin suppression. In doing so, the lamp minimizes the biological effects that the lamp may have on a user. The LED lamp is appropriately designed to produce such biologically-correct light while still maintaining commercially acceptable color temperature and color rending properties. Methods of manufacturing such a lamp are provided, as well as equivalent lamps and equivalent methods of manufacture.
-
Citations
15 Claims
-
1. A biologically-corrected light-emitting diode (LED) lamp, comprising:
-
a housing; a driver circuit disposed within the housing; a plurality of LED chips electrically coupled to and driven by the driver circuit, wherein the plurality of LED chips produce a light output; and an optic element operable to receive light from the plurality of LED chips, wherein the optic element has a color filter applied thereto, wherein the color filter is configured to increase spectral opponency to thereby decrease a biological effect of the light output of the plurality of LED chips, and wherein the color filter has a total transmission of about 75%. - View Dependent Claims (2, 3, 4, 5)
-
-
6. A biologically-corrected light-emitting diode (LED) lamp having a color rendering index above 80 and a color temperature between within the range from about 2,500 Kelvin to about 3,500 Kelvin wherein the lamp produces a spectral power distribution that increases spectral opponency to thereby minimize melatonin suppression, the lamp comprising:
-
a base; a housing attached to the base; a power circuit disposed within the housing and having electrical leads attached to the base; a driver circuit disposed within the housing and electrically coupled to the power circuit; a heat sink disposed about the housing; a plurality of LED chips electrically coupled to and driven by the driver circuit; and an optic diffusing element mounted on the heat sink and surrounding the plurality of LED chips; wherein the plurality of LED chips are thermally coupled to the heat sink; wherein the plurality of LED chips are blue-pumped white LED chips that produce light having a color temperature of between about 2,700 Kelvin and 3500 Kelvin; wherein the driver circuit is configured to drive the plurality of LED chips with a ripple current at frequencies greater than about 200 Hz; wherein the optic diffusing element has a color filter applied thereto; wherein the color filter is configured to increase spectral opponency to thereby decrease a melatonin suppressive effect of a light output from the plurality of LED chips; and wherein the color filter has a total transmission of between about 65% and 85%. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13)
-
- 14. A method of minimizing a biological effect produced by a white light-emitting diode (LED) lamp, wherein the LED lamp includes a housing, a driver circuit disposed within the housing, a plurality of LED chips electrically coupled to and driven by the driver circuit, wherein the plurality of LED chips produce a light output, and an optic element surrounding the plurality of LED chips, the method comprising the step of applying to the optic element a color filter having a transmission of between about 12% and 32% at a wavelength of about 440 nanometers, a transmission of between about 25% and 45% at a wavelength of about 460 nanometers, a transmission of between about 64% and 84% at a wavelength of about 480 nanometers, a transmission of between about 75% and 100% at a wavelength of about 560 nanometers, a transmission of between about 75% and 100% at a wavelength of about 580 nanometers, and a transmission of between about 76% and 100% at a wavelength of about 600 nanometers.
Specification