US 12,461,630 B2
Touch-sensing apparatus
David Andersson, Malmö (SE); and Mattias Krus, Lund (SE)
Assigned to FlatFrog Laboratories AB, Lund (SE)
Filed by FlatFrog Laboratories AB, Lund (SE)
Filed on Jun. 24, 2024, as Appl. No. 18/752,044.
Application 18/752,044 is a continuation of application No. 17/756,149, granted, now 12,056,316, previously published as PCT/SE2020/051117, filed on Nov. 24, 2020.
Claims priority of application No. 1930383-3 (SE), filed on Nov. 25, 2019.
Prior Publication US 2024/0427460 A1, Dec. 26, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. G06F 3/042 (2006.01)
CPC G06F 3/0428 (2013.01) 16 Claims
OG exemplary drawing
 
1. A method for detecting touch pressure in a touch sensing apparatus comprising a panel that defines a touch surface, the panel having a perimeter, the method comprising:
emitting light across the panel to be reflected against the touch surface with a plurality of emitters arranged along the perimeter,
receiving at least part of said light as detection light with a plurality of detectors arranged along the perimeter,
determining, as a touch object deflects the panel along a normal of the touch surface and changes a curvature of the panel, a difference in the received detection light between deflection of the panel from a first position to a second position along the normal, and
determining a pressure of the touch object against the touch surface based on said difference.