ELECTRONIC DEVICE WITH CAPACITIVE TOUCH-SENSITIVE DISPLAY

• US 20130194224A1
• Filed: 01/27/2012
• Published: 08/01/2013
• Est. Priority Date: 01/27/2012
• Status: Active Grant

• Current Assignee: Malikie Innovations Limited (Key Patent Innovations Limited)
• Original Assignee: Blackberry Limited
• Inventors: Lai, Jackson Chi Sun
• Granted Patent: US 9,262,020 B2
• Time in Patent Office: Days
• US Class Current: 345/174
• CPC Class Codes: G06F 3/041 Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/0443 using a single layer of sensing electrodes

Abstract

A touch-sensitive display includes a substrate, pixel electrodes disposed on the substrate, scanning electrodes interspersed with the pixel electrodes, sense electrodes spaced from the scanning electrodes, and a display material disposed between the scanning electrodes and the sense electrodes.

Claims

1. A touch-sensitive display comprising:

a substrate;

pixel electrodes disposed on the substrate;

scanning electrodes interspersed with the pixel electrodes;

sense electrodes spaced from the scanning electrodes;

a display material disposed between the pixel electrodes and the sense electrodes.

2. The touch-sensitive display according to claim 1, wherein the scanning electrodes and the pixel electrodes are deposited in a layer on the substrate.

3. The touch-sensitive display according to claim 1, comprising common electrodes disposed between the pixel electrodes and the substrate, and a dielectric disposed between the pixel electrodes and the common electrodes.

4. The touch-sensitive display according to claim 1, comprising common electrodes disposed on a first side of the liquid crystal, wherein the pixel electrodes are disposed on a second side of the liquid crystal.

5. The touch-sensitive display according to claim 1, comprising common electrodes interspersed with and electrically isolated from the sense electrodes.

6. The touch-sensitive display according to claim 1, wherein the sense electrodes are utilized as a shield.

7. The touch-sensitive display according to claim 1, comprising a color filter disposed adjacent the sense electrodes.

8. The touch-sensitive display according to claim 1, comprising a color filter disposed between the scanning electrodes and the sense electrodes.

9. The touch-sensitive display according to claim 1, wherein the sense electrodes are disposed on a substrate and extend over black matrix material.

10. The touch-sensitive display according to claim 9, wherein the scanning electrodes are aligned with the black matrix material.

11. The touch-sensitive display according to claim 1, wherein the display material comprises liquid crystal.

12. The touch-sensitive display according to claim 1, wherein the display material comprises organic light emitting diodes.

13. The touch-sensitive display according to claim 1, comprising at least one controller coupled to the pixel electrodes, the sense electrodes, and the scanning electrodes.

14. The touch-sensitive display according to claim 1, comprising a touch controller coupled to the scanning electrodes and the sense electrodes, and a display controller in communication with the touch controller to control the pixel electrodes.

15. The touch-sensitive display according to claim 14, wherein the touch controller is operable to carry out touch sensing when the pixel electrodes are not driven.

16. The touch-sensitive display according to claim 14, wherein gate lines are utilized to drive the scanning electrodes when the pixel electrodes are not driven.

17. An electronic device comprising:

a touch-sensitive display comprising;

a substrate;

pixel electrodes disposed on the substrate;

scanning electrodes interspersed with the pixel electrodes;

sense electrodes spaced from the scanning electrodes;

a display material disposed between the pixel electrodes and the sense electrodes;

at least one controller coupled to the pixel electrodes, the scanning electrodes and the sense electrodes, and configured to sense a touch on the touch-sensitive display during horizontal blanking time periods of the touch-sensitive display.

18. An electronic device comprising:

a touch-sensitive display comprising;

a substrate

pixel electrodes and scanning electrodes spaced from the pixel electrodes and disposed on the substrate;

sense electrodes spaced from the scanning electrodes;

at least one controller coupled to the pixel electrodes, the scanning electrodes and the sense electrodes, and operable to control the pixel electrodes to control the display of information, and configured to sense a touch on the touch-sensitive display.

19. The electronic device according to claim 18, wherein the at least one controller comprises a first controller coupled to the pixel electrode to control the display of information, and a second controller coupled to the scanning electrodes and the sense electrodes and coupled to the first controller to sense a touch on the touch-sensitive display.

20. The electronic device according to claim 18, wherein the pixel electrodes are coupled to the at least one controller by gate lines and the gate lines are coupled to the scanning electrodes.