US Patent No. 10,674,576

ILLUMINATION SYSTEM INCLUDING TUNABLE LIGHT ENGINE


Patent No. 10,674,576
Issue Date June 02, 2020
Title Illumination System Including Tunable Light Engine
Inventorship Yifeng Qiu, San Jose, CA (US)
Assignee Lumileds LLC, San Jose, CA (US)

Claim of US Patent No. 10,674,576

1. A system comprising:a control signal interface configured to provide a voltage control signal via a control channel; and
a light engine comprising:
a first signal generator configured to provide a first pulse-width modulated (PWM) signal based on the control signal, via a first channel;
a second signal generator configured to provide a second PWM signal based on the control signal, via a second channel; and
a third signal generator configured to provide a third PWM signal based on the first PWM signal and the second PWM signal, via a third channel;
the light engine being configured such that the three channels sum to their respective duty cycles being unity such that only one of the first PWM signal and the second PWM signal is at a logic high value concurrently and that the third PWM signal is an inverse of one of the first PWM signal and the second PWM signal having a greater duty cycle.