TOUCH SCREEN DISPLAY FOR ELECTRONIC DEVICE AND METHOD OF DETERMINING TOUCH INTERACTION THEREWITH

• US 20090244026A1
• Filed: 03/27/2008
• Published: 10/01/2009
• Est. Priority Date: 03/27/2008
• Status: Abandoned Application

• Current Assignee: Malikie Innovations Limited (Key Patent Innovations Limited)
• Original Assignee: Blackberry Limited
• Inventors: Purdy, Michael, Hui, Edward, Lowles, Robert J.
• Application Number:
  US12/056,868
• Publication Number:
  US 20090244026A1
• Time in Patent Office: Days
• US Class Current: 345/174
• 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 3/042 by opto-electronic means
• CPC Class Codes: G06F 3/0443 using a single layer of sensing electrodes

Abstract

A touch screen display system for use in an electronic device includes a display device, a capacitive touch-sensor assembly disposed on the display device for detecting a touch occurrence on the display, and an optical touch-sensor assembly at the display device for determining a location of the touch occurrence at the display in response to the capacitive touch-sensor assembly detecting the touch occurrence on the display.

Claims

1. A touch screen display system for use in an electronic device, the touch screen display system comprising:

a display device;

a capacitive touch-sensor assembly at the display device for detecting a touch occurrence on the display; and

an optical touch-sensor assembly at the display device for determining a location of the touch occurrence on the display in response to the capacitive touch-sensor assembly detecting the touch occurrence on the display.

2. The touch screen display system according to claim 1, wherein the capacitive touch-sensor assembly comprises a capacitive control component for detecting the touch occurrence.

3. The touch screen display system according to claim 2, wherein the optical touch-sensor assembly comprises an optical control component.

4. The touch screen display system according to claim 3, wherein a single touch screen controller comprises the capacitive control component and the optical control component.

5. The touch screen display system according to claim 1 wherein the capacitive touch-sensor assembly detects the touch occurrence absent detection of location of the touch occurrence at the capacitive touch-sensor assembly.

6. The touch screen display system according to claim 1, wherein the optical touch-sensor assembly detects location of the touch occurrence, absent detection of occurrence of the touch at the optical touch sensor systems.

7. The touch screen display system according to claim 1, wherein the optical touch-sensor assembly comprises optical sensors integrated into the display device.

8. The touch screen display system according to claim 1, wherein the capacitive touch-sensor assembly comprises a capacitive touch sensor layer between layers of the display device.

9. An electronic device comprising:

a housing;

a display device exposed by the housing;

a capacitive touch-sensor assembly at the display device for detecting a touch occurrence on the display;

an optical touch-sensor assembly at the display device for determining a location of the touch occurrence on the display; and

operational components housed in the housing and comprising a processor connected to the display device, the capacitive touch-sensor assembly and the optical touch sensor assembly, the operational components for causing the optical touch-sensor assembly to determine the location of the touch occurrence on the display in response to detecting the touch occurrence at the capacitive touch-sensor assembly.

10. The electronic device according to claim 9, wherein the capacitive touch-sensor assembly comprises a capacitive control component connected to the processor.

11. The electronic device according to claim 10, wherein the optical touch-sensor assembly comprises an optical control component connected to the processor.

12. The electronic device according to claim 11, wherein a single touch screen controller, connected to the processor, comprises the capacitive control component and the optical control component.

13. The electronic device according to claim 9 wherein the capacitive touch-sensor assembly detects the touch occurrence absent detection of location of the touch occurrence at the capacitive touch-sensor assembly.

14. The electronic device according to claim 9, wherein the optical touch-sensor assembly detects location of the touch occurrence, absent detection of occurrence of the touch at the optical touch sensor systems.

15. The electronic device according to claim 9, wherein the optical touch-sensor assembly comprises optical sensors integrated into the display device.

16. The electronic device according to claim 10, wherein the capacitive touch-sensor assembly comprises a capacitive touch sensor layer between layers of the display device.

17. A method of touch determination in a touch screen display system, the method comprising:

detecting, at a capacitive touch-sensor assembly disposed on a display device, a touch occurrence on the display device;

determining, at an optical touch sensor system coupled to the display device, a location of the touch occurrence in response to determining the touch occurrence at the capacitive touch-sensor assembly; and

determining an input as a result of the touch occurrence.

18. The method according to claim 17 wherein determining, at the capacitive touch-sensor assembly, the touch occurrence on the display device comprises detecting the touch occurrence absent detection of location of the touch occurrence at the capacitive touch-sensor assembly.

19. The method according to claim 17, wherein determining, at the optical touch sensor system, the location of the touch occurrence comprises determining the location of the touch occurrence, absent detection of occurrence of the touch at the optical touch sensor systems.

20. The method according to claim 17, comprising effecting a change in output at the display device as a result of the touch occurrence.