US 12,032,747 B1
Infrared based dimming gesture detection
Stefano Paolo Rivolta, Desio (IT); Roberto Mura, Milan (IT); and Edoardo Nagali, Milan (IT)
Assigned to STMicroelectronics International N.V., Geneva (CH)
Filed by STMicroelectronics International N.V., Geneva (CH)
Filed on Feb. 10, 2023, as Appl. No. 18/167,500.
Int. Cl. G06F 3/01 (2006.01); G01V 8/00 (2006.01)
CPC G06F 3/017 (2013.01) [G01V 8/005 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A device, comprising:
an infrared (IR) sensor having a field of view, the IR sensor configured to measure IR light emitted by an object in the field of view, and generate a sensor signal proportional to the measured IR light; and
a processor configured to:
detect a dimming trigger in response to a first differential calculation of the sensor signal being greater than a first threshold value;
detect a false detection of the dimming trigger in response to a second differential calculation of the sensor signal being less than a second threshold value smaller than the first threshold value or being greater than a third threshold value larger than the first threshold value;
perform a dimming operation based on the sensor signal in case the dimming trigger is detected and the false detection is undetected, the dimming operation proportionally adjusts an intensity of an output of the device based on the sensor signal.