ELECTRONIC DEVICE AND TOUCH SCREEN DISPLAY WITH FORCE SENSOR

• US 20100265197A1
• Filed: 04/08/2010
• Published: 10/21/2010
• Est. Priority Date: 04/16/2009
• Status: Abandoned Application

• Current Assignee: Blackberry Limited
• Original Assignee: Blackberry Limited
• Inventors: PURDY, Michael, LOWLES, Robert James, SINGH, Amit Pal, HOSSEINPOR, Hassan Daniel
• Application Number:
  US12/756,740
• Publication Number:
  US 20100265197A1
• Time in Patent Office: Days
• US Class Current: 345/173
• CPC Class Codes: G06F 2203/04106 Multi-sensing digitiser, i.e. digitiser using at least two different sensing technologies simultaneously or alternatively, e.g. for detecting pen and finger, for saving power or for improving position detection
• 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 screen display includes a display, touch-sensitive overlay disposed on the display, a controller operably coupled to the capacitive touch-sensitive overlay, and a capacitive force sensor. The capacitive force sensor includes first and second electrodes separated by a dielectric. The first electrode is coupled the controller.

Claims

1. A touch screen display comprising:

a display;

a touch-sensitive overlay disposed on the display;

a controller operably coupled to the touch-sensitive overlay;

a capacitive force sensor comprising first and second electrodes separated by a dielectric, wherein the first electrode is operably coupled to the controller.

2. The touch screen display according to claim 1, wherein the second electrode is grounded.

3. The touch screen display according to claim 1, wherein the second electrode comprises a bezel arranged to protect the display.

4. The touch screen display according to claim 1, wherein the dielectric comprises an adhesive between the capacitive touch-sensitive overlay and the display.

5. The touch screen display according to claim 4, wherein the first electrode comprises a conductive layer between the adhesive and the touch-sensitive overlay.

6. The touch screen display according to claim 1, wherein the first electrode comprises a conductive layer deposited on the touch-sensitive overlay.

7. The touch screen display according to claim 1, wherein the first electrode comprises a plurality of electrically isolated conductors, wherein each of the conductors is electrically coupled to the controller.

8. The touch screen display according to claim 1, wherein the first electrode comprises four electrically isolated conductors, each of the conductors disposed near a respective corner of the capacitive touch-sensitive overlay.

9. A portable electronic device comprising a housing, and the touch screen display according to claim 1.

10. A touch screen display comprising:

a display;

a capacitive touch-sensitive overlay disposed on the display;

a controller, operably coupled to the capacitive touch-sensitive overlay;

a capacitive force sensor comprising first and second electrodes separated by a dielectric adhesive adhering the display to the touch-sensitive overlay.

11. The touch screen display according to claim 10, wherein the second electrode is grounded.

12. The touch screen display according to claim 10, wherein the second electrode comprises a bezel arranged to protect the display

13. The touch screen display according to claim 10, wherein the first electrode comprises a conductive layer between the adhesive and the touch-sensitive overlay.

14. The touch screen display according to claim 10, wherein the first electrode comprises a conductive layer deposited on the touch-sensitive overlay.

15. The touch screen display according to claim 10, wherein the first electrode comprises a plurality of electrically isolated conductors.

16. The touch screen display according to claim 10, wherein an electrically isolated conductor is disposed in each corner of the capacitive touch-sensitive display, and wherein the electrode is comprised of the electrically isolated conductors.

17. A portable electronic device comprising a housing, and the touch screen display according to claim 10.