US 12,326,377 B2
Method for calibrating sensed force of touch pad module
Chieh-Hung Hsieh, Taipei (TW); Hsueh-Chao Chang, Taipei (TW); Sian-Yi Chiu, Taipei (TW); Chao-Wei Lee, Taipei (TW); and Wei-Chiang Huang, Taipei (TW)
Assigned to Primax Electronics Ltd., Taipei (TW)
Filed by Primax Electronics Ltd., Taipei (TW)
Filed on May 18, 2023, as Appl. No. 18/199,294.
Claims priority of application No. 112112693 (TW), filed on Mar. 31, 2023.
Prior Publication US 2024/0328885 A1, Oct. 3, 2024
Int. Cl. G01L 25/00 (2006.01); G06F 1/16 (2006.01); G06F 3/0354 (2013.01); G06F 3/041 (2006.01)
CPC G01L 25/00 (2013.01) [G06F 1/169 (2013.01); G06F 3/03547 (2013.01); G06F 3/04142 (2019.05); G06F 3/0418 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A method for calibrating sensed force of a touch pad module, wherein the touch pad module comprises a touch pad and a plurality of force sensing elements disposed beneath the touch pad, the method comprising:
obtaining a force reference table obtained before the touch pad module is assembled with an electronic device, the force reference table including a first data, which includes a first point of the touch pad and a plurality of first force reference values corresponding to the first point and respectively corresponding to the force sensing elements;
placing a calibration block on the first point of the touch pad after the touch pad module is assembled with the electronic device, so that the force sensing elements respectively obtain a plurality of first force test values corresponding to the first point;
calculating a plurality of first compensation ratios according to the first force reference values and the first force test values; and
inputting the first compensation ratios into the force reference table.