ELECTRONIC DEVICE AND TOUCH-SENSITIVE INPUT DEVICE

• US 20120075201A1
• Filed: 09/27/2010
• Published: 03/29/2012
• Est. Priority Date: 09/27/2010
• Status: Active Grant

• Current Assignee: Malikie Innovations Limited (Key Patent Innovations Limited)
• Original Assignee: Blackberry Limited
• Inventors: GOLOVCHENKO, Mykola, PEREVERZEV, Stanislav, STACY, William Turlay
• Granted Patent: US 8,638,307 B2
• Time in Patent Office: Days
• US Class Current: 345/173
• CPC Class Codes: G06F 1/1643 the display being associated to a digitizer, e.g. laptops that can be used as penpads details related to the relative motion of the display enclosure with respect to the body enclosure, e.g. to move between laptop and tablet PC configuration G06F1/1615
• 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
• CPC Class Codes: G06F 3/0448 Details of the electrode shape, e.g. for enhancing the detection of touches, for generating specific electric field shapes, for enhancing display quality

Abstract

A touch-sensitive input device includes a cover, a set of first conductors disposed between the cover and a substrate, the first conductors including at least two fingers connected at an end of the fingers, dummy conductors disposed between the first conductors and between the fingers of the first conductors, and a second set of conductors disposed on an opposite side of the substrate.

Claims

1. A touch-sensitive input device comprising:

a cover;

a set of first conductors disposed between the cover and a substrate, the first conductors including at least two fingers connected at an end of the fingers;

dummy conductors disposed between the first conductors and between the fingers of the first conductors;

a second set of conductors disposed on an opposite side of the substrate.

2. The touch-sensitive input device according to claim 1, wherein the width of the first conductors including the width of the fingers and the space between the fingers is equal to or less than the width of the second conductors.

3. The touch-sensitive input device according to claim 1, wherein the width of the fingers of the first conductors is less than the spacing between the first conductors.

4. The touch-sensitive input device according to claim 1, wherein a thickness of the cover is greater than the distance than an electric field extends from the first conductors.

5. The touch-sensitive input device according to claim 1, wherein the width of the fingers of the first conductors is less than the spacing between the fingers.

6. The touch-sensitive input device according to claim 1, wherein the fingers are joined at both ends.

7. The touch-sensitive input device according to claim 1, comprising a display, wherein the second set of conductors is disposed between the substrate and the display.

12. The electronic device according to claim 1, wherein the width of the fingers of the first conductors is less than the spacing between the fingers.

13. The electronic device according to claim 1, wherein the fingers are joined at both ends.

8. An electronic device comprising:

a cover;

a set of first conductors disposed between the cover and a substrate, the first conductors including at least two fingers connected at an end of the fingers;

dummy conductors disposed between the first conductors and between the fingers of the first conductors;

a second set of conductors disposed between the substrate and a display.

9. The electronic device according to claim 8, wherein the width of the first conductors including the width of the fingers and the space between the fingers is equal to or less than the width of the second conductors.

10. The electronic device according to claim 8, wherein the width of the fingers of the first conductors is less than the spacing between the first conductors.

11. The electronic device according to claim 8, wherein a thickness of the cover is greater than the distance than an electric field extends from the first conductors.

14. A touch-sensitive display comprising:

a cover disposed in a plane and having a thickness;

a first plurality of conductors, including a first conductor, disposed between the cover and a first side of a substrate;

wherein the first conductor comprises at least two members having a first end and a second end, wherein the at least two members are connected at one of the first end, the second end, and the first end and the second end;

wherein the at least two first members have a width and a length parallel to the plane, and the width is less or equal to the thickness, and the thickness is greater than a distance that an electric field extends from the first plurality of conductors in a direction substantially perpendicular to the plane;

a second plurality of conductors, including a second conductor, disposed between the substrate and a display.

15. The touch-sensitive display according to claim 14, wherein the second conductors have a width and a length parallel to the plane, and wherein the width of the second conductor is greater than the combined width of the two members.

16. The touch-sensitive display according to claim 14, comprising dummy conductors disposed between the conductors of the first plurality of conductors.

17. The touch-sensitive display according to claim 14, comprising dummy conductors disposed between the conductors of the first plurality of conductors and between the members of the first conductor.

18. The touch-sensitive display according to claim 14, wherein the width is about half the thickness.

19. The touch-sensitive display of claim 14, wherein the width and spacing of the at least two lines reduces detection of a false touch due to moisture on the cover.