PORTABLE ELECTRONIC DEVICE AND METHOD OF DETERMINING A LOCATION OF A TOUCH

• US 20120013542A1
• Filed: 07/16/2010
• Published: 01/19/2012
• Est. Priority Date: 07/16/2010
• Status: Abandoned Application

• Current Assignee: Malikie Innovations Limited (Key Patent Innovations Limited)
• Original Assignee: Blackberry Limited
• Inventors: SHENFIELD, Alon
• Application Number:
  US12/837,775
• Publication Number:
  US 20120013542A1
• Time in Patent Office: Days
• US Class Current: 345/173
• CPC Class Codes: G06F 2203/04104 Multi-touch detection in digitiser, i.e. details about the simultaneous detection of a plurality of touching locations, e.g. multiple fingers or pen and finger
• CPC Class Codes: G06F 2203/04105 Pressure sensors for measuring the pressure or force exerted on the touch surface without providing the touch position
• CPC Class Codes: G06F 3/0416 Control or interface arrangements specially adapted for digitisers
• CPC Class Codes: G06F 3/0418 for error correction or compensation, e.g. based on parallax, calibration or alignment
• CPC Class Codes: G06F 3/0443 using a single layer of sensing electrodes
• CPC Class Codes: G06F 3/0445 using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer

Abstract

A method includes determining when a touch of a plurality of touches overlapping in time on a touch-sensitive display, is discontinued, utilizing first touch data prior to the determining to identify a location of the touch, and when the first touch data is not established to be accurate, obtaining second touch data prior to the first touch data to identify the location of the touch.

Claims

1. A method comprising:

determining when a touch of a plurality of touches overlapping in time on a touch-sensitive display is discontinued;

utilizing first touch data prior to the determining to identify a location of the touch;

when the first touch data is not established to be accurate, obtaining second touch data prior to the first touch data to identify the location of the touch.

2. The method according to claim 1, wherein, when the second touch data is not established to be accurate, obtaining third touch data prior to the second touch data.

3. The method according to claim 1, obtaining within a predetermined period of time of determining, previous touch data when prior touch data is not established to be accurate.

4. The method according to claim 1, comprising determining which of the touches the touch data is associated with when the second touch data comprises touch data from a single touch.

5. The method according to claim 1, comprising discarding the second touch data when the second touch data is associated with a single touch that is a second touch of the overlapping touches.

6. The method according to claim 1, comprising making a selection associated with the second touch data when the second touch data is associated with a single touch.

7. The method according to claim 1, comprising making a selection associated with the second touch data when the second touch data comprises touch data not received within a predetermined period of time of determining.

8. The method according to claim 1, comprising obtaining previous touch data until one of a determination is made that the previous touch data is established to be accurate and the touch data is not within the predetermined period of time of determining.

9. The method according to claim 1, wherein the touch data is established to be accurate when a location of each of the touches is resolved.

10. The method according to claim 1, wherein an identifier is associated with or included in the first touch data when the first touch data not established to be accurate.

11. The method according to claim 10, wherein a flag is set to identify the touch data when the touch data is not established to be accurate.

12. The method according to claim 1, wherein the touch data is not established to be accurate when a location of at least one of the touches is not resolvable.

13. A computer-readable medium having computer-readable code executable by at least one processor of a portable electronic device to perform the method according to claim 1.

14. A portable electronic device comprising:

a touch-sensitive display;

a memory;

a processor operably coupled to the memory and to the touch-sensitive display to determine a change in number of touches when a touch of two touches is removed from a touch-sensitive display, utilize touch data received from the touch-sensitive display prior to determining the change to determine a location of the touch, and in response to determining that the touch data is associated with a low accuracy level of the touch-sensitive display, obtain previous touch data to determine the location of the touch.

15. The method according to claim 14, wherein the touch-sensitive display comprises a self capacitance touch-sensitive display.