Describing Two Led Colors as a Single, Lumped Led Color
First Claim
1. A light emitting diode (LED) lighting system (100) for producing white light, the system (100) comprisinga first set of LEDs (102, 304, 404) arranged to emit light with a first wavelength range and a first set of characteristics;
- a second set of LEDs (103, 310) arranged to emit light with a second wavelength range and a second set of characteristics;
a third set of LEDs (104) arranged to emit light with a third wavelength range and a third set of characteristics; and
a driving circuit (106) arranged to drive said sets of LEDs (102, 103, 104), comprisingan input (108, 204) for parameters determining desired light intensity and color;
an input for signals for LED temperatures of the sets of LEDs;
a model (200) for determining driving currents for said sets of LEDs from said parameters, signals, and sets of characteristics for each of said sets of LEDs (102, 103, 104); and
a current driver (208) for providing said determined currents to said sets of LEDs (102, 103, 104, 304, 404, 310), characterized in that,said third set of LEDs (104) comprises a first subset of LEDs (306, 406) with a first wavelength sub-range and a first set of characteristics, and a second subset of LEDs (308, 408) with a second wavelength sub-range and a second set of characteristics, wherein said third wavelength range is a lumped wavelength range of said first and second wavelength sub-ranges, and said third set of characteristics is a function of said first and second sets of characteristics.
4 Assignments
0 Petitions
Accused Products
Abstract
A light emitting diode (LED) lighting system for producing white light is disclosed. The system comprises sets of LEDs arranged to emit light with different wavelength ranges and associated with different sets of characteristics, and a driving circuit arranged to drive the LEDs. The driving circuit comprises an input for desired light intensity, color rendering index, and color temperature, an input for signals for LED temperature, a model for determining driving currents for said sets of LEDs from said parameters, signals, and characteristics for each of said sets of LEDs; and a current driver for the LEDs. At least one of the sets of LEDs comprises a first subset of LEDs with a first wavelength sub-range and a first set of characteristics, and a second subset of LEDs with a second wavelength sub-range and a second set of characteristics. A lumped wavelength range of the set of LEDs is a range of said first and second wavelength sub-ranges, and the set of characteristics of the set of LEDs is a function of said first and second sets of characteristics. A method for controlling the sets of LEDs is also disclosed.
-
Citations
9 Claims
-
1. A light emitting diode (LED) lighting system (100) for producing white light, the system (100) comprising
a first set of LEDs (102, 304, 404) arranged to emit light with a first wavelength range and a first set of characteristics; -
a second set of LEDs (103, 310) arranged to emit light with a second wavelength range and a second set of characteristics; a third set of LEDs (104) arranged to emit light with a third wavelength range and a third set of characteristics; and a driving circuit (106) arranged to drive said sets of LEDs (102, 103, 104), comprising an input (108, 204) for parameters determining desired light intensity and color; an input for signals for LED temperatures of the sets of LEDs; a model (200) for determining driving currents for said sets of LEDs from said parameters, signals, and sets of characteristics for each of said sets of LEDs (102, 103, 104); and a current driver (208) for providing said determined currents to said sets of LEDs (102, 103, 104, 304, 404, 310), characterized in that, said third set of LEDs (104) comprises a first subset of LEDs (306, 406) with a first wavelength sub-range and a first set of characteristics, and a second subset of LEDs (308, 408) with a second wavelength sub-range and a second set of characteristics, wherein said third wavelength range is a lumped wavelength range of said first and second wavelength sub-ranges, and said third set of characteristics is a function of said first and second sets of characteristics. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. A method for controlling three sets of LEDs, each arranged to emit light with a wavelength range and with a set of characteristics, to provide white light, comprising the steps of:
-
determining a desired light intensity and color; determining LED temperatures of the sets of LEDs; determining for each set of LEDs a driving current for each of said sets of LEDs from said desired light intensity and color, and said LED temperatures; and providing said driving currents to said sets of LEDs, characterized in that, at least one of said sets of LEDs comprises a first subset of LEDs with a first wavelength sub-range and a first set of characteristics, and a second subset of LEDs with a second wavelength sub-range and a second set of characteristics, wherein a wavelength range of said set of LEDs is a lumped wavelength range of said first and second wavelength sub-ranges, and a set of characteristics of said set of LEDs is a function of said first and second sets of characteristics. - View Dependent Claims (9)
-
Specification