US Patent No. 10,798,795

SEGMENTAL DRIVING OF LIGHT EMITTING CIRCUITS


Patent No. 10,798,795
Issue Date October 06, 2020
Title Segmental Driving Of Light Emitting Circuits
Inventorship Henricus Marius Joseph Maria Kahlman, Dongen (NL)
Ralph Kurt, Eindhoven (NL)
Assignee SIGNIFY HOLDING B.V., Eindhoven (NL)

Claim of US Patent No. 10,798,795

1. A driver adapted to connect to light emitting circuits and for driving the light emitting circuits, the driver comprising:a bypass switching circuit for guiding a bypass current signal which bypasses all light emitting circuit during an initial time-interval, amplitudes of a mains signal for feeding the driver being in an initial range and less than a minimum voltage amplitude across a first light emitting circuit to start emitting light during the initial time-interval,
a first switching circuit for guiding a first current signal through the first light emitting circuit during a first time-interval, amplitudes of the mains signal being in a first range during the first time-interval, the amplitudes of the mains signal in the first range being larger than the amplitudes of the mains signal in the initial range,
a second switching circuit for guiding a second current signal through a series connection of the first light emitting circuit and a second light emitting circuit during a second time-interval, amplitudes of the mains signal being in a second range during the second time-interval, the amplitudes of the mains signal in the second range being larger than the amplitudes of the mains signal in the first range, and
an adaptation circuit for adapting an amplitude of the bypass current signal during the initial time-interval and for adapting an amplitude of the first current signal during the first time-interval and for adapting an amplitude of the second current signal during the second time-interval so that the bypass current follows the mains signal at least in the form.