Solid state lighting apparatus and methods using integrated driver circuitry

摘要

A lighting apparatus includes a first substrate including a switching circuit, the switching circuit including a first port, a second port and a current control circuit configured to generate a current at the second port of the current control circuit responsive to a varying voltage at the first port. The apparatus further includes a second substrate mounted on the first substrate and including at least two LEDs electrically coupled to the second port of the current control circuit of the first substrate.

主权项

1. A lighting apparatus comprising:
a first substrate comprising a switching circuit; and a second substrate mechanically attached to the first substrate and comprising at least two light emitting diodes (LEDs) interfaced with the switching circuit, the switching circuit being configured to vary interconnections among the at least two LEDs responsive to a varying voltage produced by a power source to provide a plurality of different parallel and serial arrangements of the at least two LEDs including an arrangement wherein at least two parallel interconnected subsets of the at least two LEDs are connected in series with each other.