Dim-to-warm LED circuit

A dim-to-warm circuit apparatus, comprising:

• a light emitting diode (LED) multi-colored array comprising at least one desaturated red LED, at least one desaturated green LED, and at least one desaturated blue LED;
• and
• a hybrid driving-circuit coupled to the LED multi-colored array, the hybrid driving-circuit further to be coupled to a single control-device and being configured to receive a signal from the single control-device that is indicative of a level of luminous flux desired from the LED multi-colored array, the hybrid driving-circuit further being configured to supply a pulse-width modulation (PWM) time slicing signal to selected ones of the LED multi-colored array, the hybrid driving-circuit including:
• a computational device configured to determine an amount of current to supply to the LED multi-colored array based on the desired level of luminous flux, the computational device further to correlate a color temperature of the LED multi-colored array with the desired level of luminous flux;
• an analog current-division circuit to produce current for at least two LED current-driving sources, the analog current-division circuit further including a resistive divider circuit that is configured to produce an amplified voltage signal;
• and
• a multiplexer array having a plurality of switching devices coupled between the analog current-division circuit and the LED multi-colored array and configured to provide periodically, for a predetermined amount of time, current from at least one of the at least two LED current-driving sources to at least one color of the LED multi-colored array.

A method, comprising:

• determining and supplying a set voltage as an input voltage for a voltage-controlled current source;
• amplifying the set voltage using a resistive divider circuit;
• determining a luminous flux level desired of a light emitting diode (LED) multi-colored array;
• correlating the luminous flux level to a color temperature of the LED multi-colored array;
• dividing an input current into a first current and a second current;
• and
• based on a determination of the color temperature:
• providing the first current to a first of three colors of the LED multi-colored array and providing the second current to a second of three colors of the LED multi-colored array substantially simultaneously during a first portion of a time period;
• providing the first current to the second of three colors of the LED multi-colored array and providing the second current to a third of three colors of the LED multi-colored array substantially simultaneously during a second portion of the time period;
• and
• providing the first current to the first of three colors of the LED multi-colored array and providing the second current to the third of three colors of the LED multi-colored array substantially simultaneously during a third portion of the period.