Method and apparatus for detecting a force

Patent metadata

Field	Value
Publication number	US-10474273-B2
Application number	US-201715694797-A
Country	US
Kind code	B2
Filing date	Sep 3, 2017
Priority date	May 31, 2016
Publication date	Nov 12, 2019
Grant date	Nov 12, 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 includes a preset force and raw data of the first electronic device, and the raw data of the first electronic device is obtained by detecting a deformation signal generated by the preset force applied to an input medium of the first electronic device; and determining a fitting function according to the plurality of sample data of the first electronic device, where the fitting function denotes a corresponding relationship between a force applied to the input medium of the first electronic device and detected raw data, and the fitting function is used for a second electronic device to determine a force corresponding to raw data detected when an input medium of the second electronic device is subjected to an acting force.

First claim

What is claimed is:

1. A method for detecting a force, comprising:
determining, according to a fitting function, a force corresponding to detected raw data when an input medium of a second electronic device is subjected to an acting force; wherein the fitting function is obtained by:
acquiring a plurality of sample data of a first electronic device, wherein each of the plurality of sample data of the first electronic device comprises a preset force of the first electronic device and raw data of the first electronic device, and the raw data of the first electronic device is obtained by detecting a deformation signal generated by the preset force of the first electronic device applied to an input medium of the first electronic device; and
determining the fitting function according to the plurality of sample data of the first electronic device, wherein the fitting function denotes a corresponding relationship between a force applied to the input medium of the first electronic device and the detected raw data;
wherein the force corresponding to the detected raw data when the input medium of the second electronic device is subjected to the acting force is determined by a fourth raw data, a fourth force corresponding to the fourth raw data, a fifth raw data and a fifth force corresponding to the fifth raw data, wherein the fourth raw data is raw data greater than the first raw data in a data corresponding relationship table, and the fifth raw data is raw data smaller than the first raw data in the data corresponding relationship table, and the data corresponding relationship table comprises a corresponding relationship between different raw data and forces calculated in advance according to the fitting function.

2. The method according to claim 1 , wherein the determining the fitting function according to the plurality of sample data of the first electronic device, comprises:
determining the fitting function according to the plurality of sample data of the first electronic device and a plurality of updated sample data of a third electronic device, wherein the plurality of updated sample data of the third electronic device is obtained by:
acquiring a plurality of sample data of the third electronic device, wherein each of the plurality of sample data of the third electronic device comprises a preset force of the third electronic device and raw data of the third electronic device, and the raw data of the third electronic device is obtained by detecting a deformation signal generated by the preset force of the third electronic device applied to an input medium of the third electronic device; and
updating the plurality of sample data of the third electronic device according to the plurality of sample data of the first electronic device.

3. The method according to claim 2 , wherein the updating the plurality of sample data of the third electronic device according to the plurality of sample data of the first electronic device, comprises:
determining a force offset

Δ

2
⁢
j

=

F

2
⁢
j

-

[

F

1
⁢
m

+

R

1
⁢
m

-

R

2
⁢
j

R

1
⁢
m

-

R

1
⁢

(

m
+
1

)

⁢

(

F

1
⁢

(

m
+
1

)

-

F

1
⁢
m

)

]

of sample data (F 2j , R 2j ) of the third electronic device according to (F 1m , R 1m ) and (F 1(m+1) , R 1(m+1) ), wherein F 1m denotes a preset force applied to the first electronic device, R 1m denotes raw data corresponding to the preset force of the first electronic device, and R 1m >R 1(m+1) , m=0, 1, 2, . . . N 1 −2, N 1 denotes the number of the sample data of the first electronic device, and F 2J denotes a preset force applied to the third electronic device, R 2j denotes raw data corresponding to the preset force of the third electronic device, j=0, 1, 2, . . . N 2 −1, N 2 denotes the number of the sample data of the third electronic device, and R 1m >R 2j >R 1(m+1) ; and
updating the (F 2j , R 2j ) as (F 2j −Δ 2j , R 2j ) according to the force offset.

4. The method according to claim 1 , wherein the force corresponding to the detected raw data when the input medium of the second electronic device is subjected to the acting force is determined by a difference between a first force and a second force, wherein the first force is obtained by substituting a first raw data into the fitting function, the second force is obtained by substituting a second raw data into the fitting function, and the first raw data is the detected raw data, and the second raw data is obtained by detecting a deformation signal generated by a zero force applied to the input medium of the second electronic device.

5. The method according to claim 1 , wherein the fitting function is:

Assignees

• Shenzhen Goodix Tech Co Ltd

Inventors

• Gui Xintao
• Chen Xiaoxiang
• Zhong Xiang

Classifications

• G06F3/0414 Primary

  using force sensing means to determine a position · CPC title

• G06F3/044 Primary

  by capacitive means · CPC title

• G06F3/0412

  Digitisers structurally integrated in a display · CPC title

• G06F3/0418 Primary

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

• G06F3/04166

  Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving (Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally G06F3/04184) · CPC title