US 11,703,974 B2
Load control device having a capacitive touch surface
James P. Steiner, Royersford, PA (US); Dinesh Sundara Moorthy, Allentown, PA (US); and Christoph Porwol, Boynton Beach, FL (US)
Assigned to Lutron Technology Company LLC, Coopersburg, PA (US)
Filed by Lutron Technology Company LLC, Coopersburg, PA (US)
Filed on Dec. 21, 2021, as Appl. No. 17/557,435.
Application 17/557,435 is a continuation of application No. 17/005,209, filed on Aug. 27, 2020, granted, now 11,237,665.
Claims priority of provisional application 63/028,968, filed on May 22, 2020.
Claims priority of provisional application 62/892,469, filed on Aug. 27, 2019.
Prior Publication US 2022/0113829 A1, Apr. 14, 2022
Int. Cl. G06F 3/041 (2006.01); G06F 3/044 (2006.01); H05K 1/16 (2006.01); H05B 39/04 (2006.01); G08C 17/00 (2006.01); H03K 17/96 (2006.01); H05B 45/10 (2020.01); H05B 45/20 (2020.01); H05B 47/10 (2020.01); H05B 47/175 (2020.01)
CPC G06F 3/0416 (2013.01) [G06F 3/044 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A control device configured for use in a load control system to control one or more electrical loads external to the control device, the control device comprising:
an actuation member having a front surface that defines a touch sensitive surface along at least a portion of the front surface;
a touch sensitive device comprising one or more receiving capacitive touch pads located behind the actuation member and adjacent to the touch sensitive surface, the touch sensitive device configured to detect a touch actuation along the touch sensitive surface; and
a control circuit configured to determine a position of the touch actuation along the touch sensitive surface in response to the receiving capacitive touch pads;
wherein the control circuit is further configured to use a filtering technique for the touch sensitive device for determining the position of the touch actuation along the touch sensitive surface, the control circuit configured to operate in an active touch mode when the touch actuation is detected and in an inactive touch mode when the touch actuation is not detected, and wherein the control circuit is configured to use the filtering technique with a first variable when the control circuit is in the active touch mode and use the filtering technique with a second variable when the control circuit is in the inactive touch mode.