Electronic device and touch-sensitive input device

• US 8,681,119 B2
• Filed: 09/27/2010
• Issued: 03/25/2014
• 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
• Primary Examiner(s): Shalwala, Bipin
• Assistant Examiner(s): Xie, Kwin
• Application Number:
  US12/891,111
• Publication Number:
  US 20120075232A1
• Time in Patent Office: 1,275 Days
• Field of Search: None
• US Class Current: 345/174
• CPC Class Codes: G06F 2203/04107 Shielding in digitiser, i.e. guard or shielding arrangements, mostly for capacitive touchscreens, e.g. driven shields, driven grounds
• 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 touch-sensitive input device includes a first set of conductors and a second set of conductors. The first set of conductors include a first conductor including a plurality of first fingers extending from a first spine, and a second conductor including a plurality of second fingers extending from a second spine, wherein the first fingers are interleaved with the second fingers. The second set of conductors are separated from the first set of conductors by a dielectric material and include a third conductor including a plurality of third fingers extending from a third spine, and a fourth conductor including a plurality of fourth fingers extending from a fourth spine, wherein the third fingers are interleaved with the fourth fingers.

Claims

1. A touch-sensitive input device comprising:

a first set of conductors comprising a first conductor including a first finger, a second finger, and third finger extending from a first spine and a second conductor including a fourth finger, a fifth finger, and a sixth finger extending from a second spine, wherein the first finger, the second finger and third finger are interleaved with the fourth finger, the fifth finger, and the sixth finger;

a second set of conductors separated from the first set of conductors by a dielectric material and comprising a third conductor including a seventh finger, an eighth finger, and a ninth finger extending from a third spine and a fourth conductor including a tenth finger, an eleventh finger, and a twelfth finger extending from a fourth spine, wherein the seventh finger, the eighth finger, and the ninth finger are interleaved with the tenth finger, the eleventh finger, and the twelfth finger;

a first bonding pad disposed on the first spine to electrically couple the first conductor to a first conductive trace;

a second bonding pad disposed on the fourth finger, a third bonding pad disposed on the fifth finger, and a fourth bonding pad disposed on the sixth finger to electrically couple the second conductor to a second conductive trace.

2. The touch-sensitive input device according to claim 1, wherein the touch-sensitive input device comprises a touch-sensitive display and the first set of conductors are disposed over an area of the display to substantially shield radio frequency signals from a display of the touch-sensitive display.

3. The touch-sensitive input device according to claim 1, wherein the touch-sensitive input device comprises a touch-sensitive display and the first set of conductors are disposed over a majority of a display of the touch-sensitive display to substantially shield radio frequency signals from the display.

4. The touch-sensitive input device according to claim 1, wherein spaces between the first fingers and the second fingers are small compared to the width of the fingers.

5. The touch-sensitive input device according to claim 1, wherein the spaces between the third fingers and the fourth fingers are larger than the spaces between the first fingers and the second fingers.

6. The touch-sensitive input device according to claim 1, wherein the touch-sensitive input device comprises a touch-sensitive display and wherein spaces between the fingers of the first conductor and the fingers of the second conductor are small compared to the width of the fingers of the first conductor to facilitate shielding of electrical signals from a display.

7. The touch-sensitive input device according to claim 1, comprising a display, wherein the dielectric material is disposed on the display.

8. The touch-sensitive input device according to claim 1, wherein the touch-sensitive input device comprises a touch-sensitive display and the dielectric material comprises a part of a display.

9. The touch-sensitive input device according to claim 1, wherein the first set of conductors comprises further conductors.

10. The touch-sensitive input device according to claim 1, wherein the second set of conductors comprises further conductors.

11. The touch-sensitive input device according to claim 1, comprising:

a fifth bonding pad disposed on the third spine to electrically coupled the third conductor to a third conductive trace;

a plurality of a sixth bonding pad disposed on the tenth finger, a seventh bonding pad disposed on the eleventh finger, and an eighth bonding pad disposed on the twelfth finger to electrically couple the fourth conductor to a fourth conductive trace.

12. An electronic device comprising:

a display;

a first set of conductors disposed on the display and comprising;

a first conductor including a plurality of first fingers extending from a first spine located on a first side of the touch-sensitive input device;

a second conductor including a plurality of second fingers extending from a second spine located on a second side of the touch-sensitive input device, wherein the second side is opposite the first side;

a first bonding pad disposed on the first spine to electrically couple the first conductor to a first conductive trace;

a plurality of second bonding pads disposed on the plurality of second fingers to electrically couple the second conductor to a second conductive trace;

wherein the first fingers extend towards the second side and the second fingers extend toward the first side such that the first fingers are interleaved with the second fingers;

a second set of conductors separated from the first set of conductors by a dielectric material and comprising;

a third conductor including a plurality of third fingers extending from a third spine located on a third side of the touch-sensitive input device and

a fourth conductor including a plurality of fourth fingers extending from a fourth spine located on a fourth side of the touch-sensitive input device, wherein the fourth side is opposite the third side,

wherein the third fingers extend towards the fourth side and the fourth fingers extend toward the third side such that the third fingers are interleaved with the fourth fingers;

a processor operably coupled to the display, the first set of conductors, and the second set of conductors.

13. The electronic device according to claim 12, wherein the width of the first and second fingers is greater than the width of the third and fourth fingers.

14. The electronic device according to claim 12, wherein the first fingers and the second fingers are generally parallel.

15. The electronic device according to claim 12, wherein the third fingers and the fourth fingers are generally parallel.