Method and device operating an electronic device in a vehicle via a touchscreen through filtering

Patent metadata

Field	Value
Publication number	US-10126871-B2
Application number	US-201414910925-A
Country	US
Kind code	B2
Filing date	Jul 31, 2014
Priority date	Aug 9, 2013
Publication date	Nov 13, 2018
Grant date	Nov 13, 2018

Abstract

A method for operating an electronic device via a touchscreen, wherein the operation is carried out on the basis of a position signal generated by an input movement touching the touchscreen, includes carrying out a filtering of the position signal in such a way that at least one movement component of the input movement is at least partially suppressed, wherein a filtered position signal is obtained, and actuating the electronic device on the basis of this filtered position signal.

First claim

The invention claimed is:

1. A method for operating an electronic device via a touchscreen in a vehicle, comprising:
generating an intended position signal by an input movement touching the touchscreen, wherein the input movement is overlaid by unintended movement components;
filtering the position signal to remove at least two of the unintended movement components to obtain a filtered position signal, wherein the filtering comprises
removing a Brownian motion component by adapting a filter constant of a low-pass filter associated with the filtering depending on a result of a cross-correlation of the position signal and a variable selected according to an acceleration sensor signal of the vehicle,
removing a component due to a vehicle vibration through a double integration of the acceleration sensor signal and the position signal or by applying a notch filter to a Fourier transform of the acceleration sensor signal, and
removing a component due to sudden driver operations or road surface unevenness by comparing the acceleration sensor signal with a previously determined standard deviation; and

actuating the electronic device on a basis of the filtered position signal.

2. The method as claimed in claim 1 , wherein the unintended movement components comprise an irregular movement of a hand of an operating person extended to perform the input movement.

3. The method as claimed in claim 1 , wherein the unintended movement components comprise vibration-induced relative movements, due to vibrations of the vehicle, between a hand of an operating person extended to perform the input movement and the touchscreen.

4. The method according to claim 1 , wherein the unintended movement components comprise movements due to steering or braking operations of the vehicle or due to unevenness of a road surface.

5. The method as claimed in claim 1 , wherein the position signal has three location coordinates relative to the touchscreen, and wherein the position signal is filtered for each of the three location coordinates.

6. The method as claimed in claim 1 , wherein the position signal is frozen in response to a position change determined during the input movement or an acceleration determined during the input movement exceeding a predefined threshold value.

7. The method as claimed in claim 1 , wherein visual or haptic feedback is conveyed to a person carrying out the input movement in response to the input movement touching the touchscreen.

8. A method for operating an electronic device via a touchscreen in a vehicle, comprising:
generating an intended position signal by an input movement touching the touchscreen, wherein the input movement is overlaid by unintended movement components;
filtering the position signal to remove at least two of the unintended movement components to obtain a filtered position signal, wherein the filtering comprises
removing a Brownian motion component by adapting a filter constant of a low-pass filter associated with the filtering depending on a result of a cross-correlation of the position signal and a variable selected according to an acceleration sensor signal of the vehicle, and
removing a component due to vehicle vibration through a double integration of the acceleration sensor signal and the position signal or by applying a notch filter to a Fourier transform of the acceleration sensor signal; and

actuating the electronic device on a basis of the filtered position signal.

9. The method as claimed in claim 8 , wherein the position signal is frozen in response to a position change determined during the input movement or an acceleration determined during the input movement exceeding a predefined threshold value.

10. The method as claimed in claim 8 , wherein visual or haptic feedback is conveyed to a person carrying out the input movement in response to the input movement touching the touchscreen.

11. A method for operating an electronic device via a touchscreen in a vehicle, comprising:
generating an intended position signal by an input movement touching the touchscreen, wherein the input movement is overlaid by unintended movement components;
filtering the position signal to remove at least two of the unintended movement components to obtain a filtered position signal, wherein the filtering comprises
removing a Brownian motion component by adapting a filter constant of a low-pass filter associated with the filtering depending on a result of a cross-correlation of the position signal and a variable selected according to an acceleration sensor signal of the vehicle, and
removing a component due to sudden driver operations or road surface unevenness by comparing the acceleration sensor signal with a previously determined standard deviation and suppressing any changes in position for a specific time period; and

actuating the electronic device on a basis of the filtered position signal.

12. The method as claimed in claim 11 , wherein the position signal is frozen if a position change determined during the input movement or an acceleration determined during the input movement exceeds a predefined threshold value.

13. The method as claimed in claim 11 , wherein visual or haptic feedback is conveyed to a person carrying out the input movement in response to the input movement touching the touchscreen.

Assignees

• Ford Global Tech Llc

Inventors

• Alpman Erik
• Arndt Christoph
• Busch Rainer
• Christen Urs

Classifications

• G06F3/04817

  using icons (graphical or visual programming using iconic symbols G06F8/34) · CPC title

• G06F3/017

  Gesture based interaction, e.g. based on a set of recognized hand gestures (interaction based on gestures traced on a digitiser G06F3/04883) · CPC title

• G06F3/0418 Primary

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

• B60K2350/1028

  Operations & Transport · mapped topic

• G06F3/0414

  using force sensing means to determine a position · CPC title