Method and apparatus for detecting force

Patent metadata

Field	Value
Publication number	US-10429982-B2
Application number	US-201715694823-A
Country	US
Kind code	B2
Filing date	Sep 3, 2017
Priority date	May 31, 2016
Publication date	Oct 1, 2019
Grant date	Oct 1, 2019

Abstract

The present disclosure provide a method for detecting a force, including: acquiring a plurality of sample data of a first electronic device, where each of the plurality of sample data comprises a preset force and raw data of the first electronic device, the raw data of the first electronic device is obtained by detecting a deformation signal which is generated by applying the preset force on an input medium of the first electronic device; and determining a fitting function according to the plurality of sample data, where the fitting function denotes a corresponding relationship between a force applied to the first electronic device and detected raw data, and the fitting function is for allowing a second electronic device to determine a force corresponding to detected raw data when an input medium of the second electronic device is subjected to an acting force.

First claim

The invention claimed is:

1. A method for detecting a force, comprising:
acquiring a plurality of sample data of a first region of an input medium of a first electronic device, wherein the input medium of the first electronic device comprises a plurality of regions, each of the plurality of regions corresponding to at least one sensing electrode, each of the plurality of sample data of the first region comprises a preset force of the first region and raw data of the first region, the raw data of the first region is obtained by detecting an electrical signal of the first region, and the electrical signal of the first region is generated by a sensing electrode corresponding to the first region converting a deformation signal which is generated by applying the preset force of the first region on the first region;
determining a first R-F function of the first region according to the plurality of sample data of the first region, wherein the first R-F function denotes a corresponding relationship between a force applied to the first region and detected raw data of the first region; and
determining a second R-F function corresponding to a second region of an input medium of a second electronic device according to the first R-F function, wherein a curve corresponding to the second R-F function is obtained through left and right translation, up and down translation and/or up and down stretch and contraction of a first R-F curve corresponding to the first R-F function, the second R-F function is for allowing the second electronic device to determine a force corresponding to detected raw data of the second region when the second region is subjected to an acting force, and a position where the second region is located on the input medium of the second electronic device corresponds to a position where the first region is located on the input medium of the first electronic device.

2. The method according to claim 1 , wherein the determining the second R-F function corresponding to the second region of the input medium of the second electronic device according to the first R-F function comprises:
determining a first parameter, a second parameter and a third parameter according to first raw data, second raw data, a first force and the first R-F function, wherein the first parameter denotes an amount of stretch or contraction of the first R-F curve, the second parameter denotes an amount of up or down translation of the first R-F curve, the third parameter denotes an amount of left or right translation of the first R-F curve, the first force is a preset nonzero force, the first raw data is obtained by detecting an electrical signal of a sensing electrode corresponding to the second region when a zero force is applied to the second region, and the second raw data is obtained by detecting an electrical signal of the sensing electrode corresponding to the second region when the first force is applied to the second region; and
determining the second R-F function according to the first parameter, the second parameter and the third parameter.

3. The method according to claim 1 , wherein the determining the second R-F function corresponding to the second region of the input medium of the second electronic device according to the first R-F function comprises:
determining a first parameter, a second parameter and a third parameter according to first raw data, second raw data, a first force and the first R-F function, wherein the first parameter denotes an amount of stretch or contraction of the first R-F curve, the second parameter denotes an amount of up or down translation of the first R-F curve, the third parameter denotes an amount of left or right translation of the first R-F curve, the first force is obtained by substituting third raw data into the first R-F function, the third raw data is obtained by detecting an electrical signal of the sensing electrode corresponding to the first region when a preset second force is applied to a third region of the input medium of the first electronic device, the first raw data is obtained by detecting an electrical signal of a sensing electrode corresponding to the second region when a zero force is applied to a fourth region of the input medium of the second electronic device, the second raw data is obtained by detecting an electrical signal of the sensing electrode corresponding to the second region when the second force is applied to the fourth region, and a position where the third region is located on the input medium of the first electronic device corresponds to a position where the fourth region is located on the input medium of the second electronic device; and
determining the second R-F function according to the first parameter, the second parameter and the third parameter.

4. The method according to claim 3 , wherein the determining the first parameter, the second parameter and the third parameter according to the first raw data, the second raw data, the first force and the first R-F function comprises:
determining {circumflex over (K)} 2 and Δ{circumflex over (R)}aw which make

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Assignees

• Shenzhen Goodix Tech Co Ltd

Inventors

• Gui Xintao
• Chen Xiaoxiang
• Zhong Xiang

Classifications

• G06F2203/04105

  Pressure sensors for measuring the pressure or force exerted on the touch surface without providing the touch position · CPC title

• G06F3/044

  by capacitive means · CPC title

• G06F3/0414 Primary

  using force sensing means to determine a position · CPC title

• G06F3/0418 Primary

  for error correction or compensation, e.g. based on parallax, calibration or alignment · CPC title

• G06F3/0412

  Digitisers structurally integrated in a display · CPC title