US Patent No. 11,071,184

SMART FLICKER-FREE PWM GENERATION FOR MULTI-CHANNEL LED DRIVERS


Patent No. 11,071,184
Issue Date July 20, 2021
Title Smart Flicker-free Pwm Generation For Multi-channel Led Drivers
Inventorship Rosario Chiodo, Selvazzano Dentro (IT)
Pietro Vallese, Padua (IT)
Assignee Infineon Technologies AG, Neubiberg (DE)

Claim of US Patent No. 11,071,184


1. A method comprising:receiving, by light emitting diode (LED) control circuitry, a light pattern, wherein the light pattern comprises a pixel-matrix duty-cycle map that includes a plurality of first duty-cycle values;
applying, by the LED control circuitry, a fixed phase shift map to the pixel-matrix duty-cycle map,wherein each entry in the fixed phase shift map is associated with a respective pixel in an LED pixel-matrix, and
wherein each respective pixel is associated with a respective pixel driver circuit; and

generating, by the LED control circuitry, a pixel driving matrix comprising a plurality of shifted duty-cycle values, wherein each shifted duty-cycle value is based on each first duty-cycle value and the applied fixed phase shift map.