US Pat. No. 9,769,895

LIGHT EMITTING DIODE (LED) WARM ON DIM CIRCUIT

LuxTech, LLC, Philadelph...

1. A light emitting diode (LED) dimmer circuit, comprising:
at least one white LED;
a first controllable current source coupled to the at least one white LED;
at least one deep red LED;
a second controllable current source coupled to the at least one deep red LED; and
a control system configured to control said first controllable current source to produce a current that increases linearly
as a dimming level increases, and configured to control said second controllable current source to produce a current that
increases linearly as the dimming level increases, the dimming level having a maximum level.

US Pat. No. 10,143,052

LIGHT EMITTING DIODE (LED) WARM ON DIM CIRCUIT

LuxTech, LLC, Philadelph...

1. A light emitting diode (LED) dimmer circuit, comprising:at least one white LED;
a first controllable current source coupled to the at least one white LED and configured to produce a current that increases linearly as a dimming level increases;
at least one deep red LED; and
a second controllable current source coupled to the at least one deep red LED and configured to produce a current that increases linearly as the dimming level increases, the dimming level having a maximum level.