Electronic device including touch-sensitive display and method of controlling same

• US 9,158,405 B2
• Filed: 06/15/2012
• Issued: 10/13/2015
• Est. Priority Date: 06/15/2012
• Status: Active Grant

• Current Assignee: Malikie Innovations Limited (Key Patent Innovations Limited)
• Original Assignee: Blackberry Limited
• Inventors: Lai, Jackson Chi Sun, Wang, Qian Q. W.
• Primary Examiner(s): Sharifi-Tafreshi, Koosha
• Application Number:
  US13/524,332
• Publication Number:
  US 20130335338A1
• Time in Patent Office: 1,215 Days
• Field of Search: 345/104, 345/173, 345/174
• US Class Current: 1/1
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• 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
• CPC Class Codes: G06F 3/0446 using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes

Abstract

A method includes exciting a first gate line of a touch-sensitive display to control display of information, driving a first scanning electrode of the touch-sensitive display while exciting the gate line, wherein the first gate line is associated with a first area of the display and the first scanning electrode is associated with a second area of the display, which second area is spaced from the first area.

Claims

1. A method comprising:

sequentially exciting gate lines coupled to pixel electrodes of a touch-sensitive display to control display of information on the touch-sensitive display;

driving scanning electrodes to detect touches detecting touches on the touch-sensitive display using mutual capacitance touch sensing by;

sensing utilizing sense electrodes and driving scanning electrodes while exciting gate lines; and

sensing utilizing the sense electrodes and driving scanning electrodes during blanking times of the touch-sensitive display in which the gate lines are not excited such that each scanning electrode is driven more frequently than the frequency of excitation of each gate line;

wherein each one of the gate lines is excited while driving a respective one of the scanning electrodes, and for each gate line that is excited while the respective one of the scanning electrodes is driven, a plurality of the gate lines and a plurality of the scanning electrodes are disposed between the gate line that is excited and the respective scanning electrode that is driven such that each gate line that is excited is spaced from each scanning electrode that is driven at the same time by other gate lines and scanning electrodes, to facilitate mutual capacitance touch sensing while exciting gate lines.

2. The method according to claim 1, wherein each one of the gate lines is separated from the respective one of the scanning electrodes by a distance of about one half of the display.

3. The method according to 1, wherein a scanning rate of the touch-sensitive display is dynamically adjusted.

4. The method according to claim 1, wherein a first scanning electrode is adjacent a first gate line that is excited and is not separated from the first gate line that is excited by other gate lines and scanning electrodes, and the first scanning electrode is not driven while the adjacent first gate line is excited.

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

6. An electronic device comprising:

a touch-sensitive display comprising;

gate coupled to pixel electrodes to control display of information on the touch-sensitive display;

scanning electrodes and sense electrodes spaced from the scanning electrodes to detect touches on the touch-sensitive display;

at least one controller coupled to the scanning electrodes, the sense electrodes, and the gate lines, and configured to control the display of information by;

sequentially exciting gate lines;

driving scanning electrodes to detect touches by;

sensing utilizing the sense electrodes and driving the scanning electrodes while exciting the gate lines; and

sensing utilizing the sense electrodes and driving the scanning electrodes during blanking times of the touch-sensitive display in which the gate lines are not excited such that each scanning electrode is driven more frequently than the frequency of excitation of each gate line;

wherein each one of the gate lines is excited while driving a respective one of the scanning electrodes, and for each gate line that is excited while the respective one of the scanning electrodes is driven, a plurality of the gate lines and a plurality of the scanning electrodes are disposed between the gate line that is excited and the respective scanning electrode that is driven such that each gate line that is excited is spaced from each scanning electrode that is driven at the same time by other gate lines and scanning electrodes, to facilitate mutual capacitance touch sensing while exciting gate lines.

7. The electronic device according to claim 6, wherein each one of the gate lines is separated from the respective one of the scanning electrodes by a distance of about one half of the display.

8. The electronic device according to claim 6, wherein a scanning rate of the touch-sensitive display is dynamically adjusted.

9. The electronic device according to claim 6, wherein a first scanning electrode is adjacent a first gate line that is excited and is not separated from the first gate line that is excited by other gate lines and scanning electrodes, and the first scanning electrode is not driven while the adjacent first gate line is excited.

10. The electronic device according to claim 6, wherein the touch-sensitive display is an in-cell touch-sensitive display or an on-cell touch-sensitive display.