Patent ID: 11864283
Assignee: LUMILEDS, LLC
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 0:
1. A light emitting diode (LED) array temperature monitor and control system comprising:
a first driver coupled to a first pixel connected to a bus by a first switch;
a second driver coupled to a second pixel connected to a bus by a second switch; and
a control block coupled to the first and second switches, the control block operable to:
turn on the first switch and turn off the second switch,
measure a bus voltage on the bus of the first pixel while the first switch is turned on and the second switch is turned off,
determine, based on the bus voltage, an LED forward voltage shift of the first pixel and a corresponding temperature shift for the first pixel based on the LED forward voltage shift, and
adjust a driving current for the first pixel based on the temperature shift.