US Patent No. 9,743,473

CASCADE LED DRIVER AND CONTROL METHODS


Patent No. 9,743,473
Issue Date August 22, 2017
Title Cascade Led Driver And Control Methods
Inventorship Matthew D. Weaver, Aptos, CA (US)
Assignee LUMENETIX, INC., Scotts Valley, CA (US)

Claim of US Patent No. 9,743,473

1. A device for controlling a circuit in communication with a plurality of light emitting elements, the device comprising:
a clock to generate a cyclic signal at a clock frequency;
a divider to slow down the cyclic signal;
a register configured to store a stored value;
an accumulator configured to store an accumulator value;
a plurality of drivers for the plurality of light emitting elements; and
a waveform generator configured to generate a digital waveform based on successive additions of the stored value to the accumulator
value, wherein the digital waveform is provided to the plurality of drivers corresponding to the plurality of light emitting
elements; and

wherein each driver of the plurality of drivers includes:
a gate driver configured to receive a respective digital waveform from the waveform generator;
a cascade driver coupled to the gate driver, wherein the cascade driver includes at least a capacitor;
wherein the cascade driver provides continuous electrical current to a corresponding light emitting element of the plurality
of light emitting elements at a respective current ratio dictated by the respective digital waveform.