Capacitive sensor array and gesture recognition

• US 20090008161A1
• Filed: 10/25/2007
• Published: 01/08/2009
• Est. Priority Date: 07/04/2007
• Status: Abandoned Application

• Current Assignee: Cypress Semiconductor Corporation (Infineon Technologies AG)
• Original Assignee: Cypress Semiconductor Corporation (Infineon Technologies AG)
• Inventors: Jones, Christopher W., Seguine, Ryan D.
• Application Number:
  US11/978,075
• Publication Number:
  US 20090008161A1
• Time in Patent Office: Days
• US Class Current: 178/18.60
• 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 3/0485 Scrolling or panning
• CPC Class Codes: G06F 3/04883 for inputting data by handwriting, e.g. gesture or text

Abstract

Apparatus and methods for determining a deflection of a moveable conductive plate that is moved over a capacitive sensing device. The method may include moving the moveable conductive plate over sensor elements of the capacitive sensing device, and determining the deflection of the moveable conductive plate. In determining the deflection, a deflection magnitude and a deflection direction may be determined by calculating a vector of x- and y-directions or a vector of a radius and an angle.

Claims

1. A method, comprising:

detecting a presence of a conductive object on a sensor array at a first position;

detecting a scrolling gesture on the sensor array when the conductive object is moved initially in a first direction from the first position and subsequently in a second direction; and

detecting an end of the scrolling gesture when the conductive object is released from the sensor array.

2. The method of claim 1, wherein detecting the scrolling gestures comprises:

detecting the conductive object in the first position;

detecting an initial motion of the conductive object in the first direction from the first position; and

detecting subsequent motion of the conductive object without the conductive object being released from the sensor array, wherein the subsequent motion includes at least one of up or down, or right or left motions of the conductive object on the sensor array.

3. The method of claim 2, further comprising:

detecting a first speed of the initial motion;

detecting a second speed of the subsequent motion; and

controlling a scrolling speed of the scrolling gesture based on the first speed and the second speed.

4. The method of claim 1, further comprising:

detecting a scroll-right gesture when the conductive object is detected as moving to the right of the first position without the conductive object being released from the sensor array; and

detecting a scroll-left gesture when the conductive object is detected to the left of the first position without the conductive object being released from the linear sensor array.

5. The method of claim 1, further comprising:

detecting a scroll-up gesture when the conductive object is detected as moving upwards from the first position without the conductive object being released from the sensor array; and

detecting a scroll-down gesture when the conductive object is detected as moving downwards from the first position without the conductive object being released from the linear sensor array.

6. The method of claim 1, further comprising:

detecting a scroll-right-and-stop gesture when the conductive object is detected as moving to the right of the first position and the conductive object is released from the sensor array at a second position that is to the right of the first position; and

detecting a scroll-left-and-stop gesture when the conductive object is detected to the left of the first position and the conductive object is released from the sensor array at a third position that is to the left of the first position.

7. The method of claim 1, further comprising:

detecting a scroll-up-and-stop gesture when the conductive object is detected as moving upwards from the first position and the conductive object is released from the sensor array at a second position that is above the first position of the sensor array;

detecting a scroll-down-and-stop gesture when the conductive object is detected moving downwards from the first position and the conductive object is released from the sensor array at a third position that is below the first position of the sensor array;

8. The method of claim 1, further comprising:

detecting a continuous scroll-right gesture when the first position is detected in a first zone of the sensor array and when the conductive object is detected as moving to the right of the first position and detected at a second position that is in a second zone of the sensor array without the conductive object being released from the sensor array, wherein the continuous scroll-right gesture is configured to stop scrolling when the conductive object is released from the second zone; and

detecting a continuous scroll-left gesture when the first position is detected in the second zone of the sensor array and when the conductive object is detected as moving to the left of the first position and detected at a third position that is in the first zone of the sensor array without the conductive object being released from the sensor array, wherein the continuous scroll-left gesture is configured to stop scrolling when the conductive object is released from the first zone.

9. The method of claim 1, further comprising:

detecting a continuous scroll-up gesture when the first position is detected in a first zone of the sensor array and when the conductive object is detected as moving upwards from the first position and detected at a second position that is in a second zone of the sensor array without the conductive object being released from the sensor array, wherein the continuous scroll-up gesture is configured to stop scrolling when the conductive object is released from the second zone; and

detecting a continuous scroll-down gesture when the first position is detected in the second zone of the sensor array and when the conductive object is detected as moving downwards from the first position and detected at a third position that is in the first zone of the sensor array without the conductive object being released from the sensor array, wherein the continuous scroll-down gesture is configured to stop scrolling when the conductive object is released from the first zone.

10. The method of claim 1, further comprising:

detecting a continuous scroll-right gesture when the conductive object is detected as initially moving to the right of the first position without the conductive object being released from the sensor array, wherein the continuous scroll-right gesture is configured to stop scrolling when the conductive object is released from sensor array; and

detecting a continuous scroll-left gesture when the conductive object is detected as initially moving to the left of the first position without the conductive object being released from the sensor array, wherein the continuous scroll-left gesture is configured to stop scrolling when the conductive object is released from the sensor array.

11. The method of claim 10, further comprising:

after the conductive object is initially moved to the right of the first position, subsequently detecting the conductive object moving to the left or right without the conductive object being released from the sensor array; and

after the conductive object is initially moved to the left of the first position, subsequently detecting the conductive object moving to the right or left without the conductive object being released from the sensor array.

12. The method of claim 1, further comprising:

detecting a continuous scroll-up gesture when the conductive object is detected as initially moving upwards from the first position without the conductive object being released from the sensor array, wherein the continuous scroll-up gesture is configured to stop scrolling when the conductive object is released from sensor array; and

detecting a continuous scroll-down gesture when the conductive object is detected as initially moving downwards from the first position without the conductive object being released from the sensor array, wherein the continuous scroll-down gesture is configured to stop scrolling when the conductive object is released from the sensor array.

13. The method of claim 12, further comprising:

after the conductive object is initially moved upwards the first position, subsequently detecting the conductive object moving downwards or upwards without the conductive object being released from the sensor array; and

after the conductive object is initially moved to the left of the first position, subsequently detecting the conductive object moving upwards or downwards without the conductive object being released from the sensor array.

14. An apparatus, comprising

a processing device coupled to receive signals from a first linear sensor array, wherein the processing device is configured to detect a continuous scrolling gesture on the first linear sensor array without a conductive object being released from and reapplied to the first linear sensor array to continue the continuous scrolling gesture.

15. The apparatus of claim 14, wherein the processing device is coupled to receive signals from a second linear sensor array, and wherein the processing device is configured to detect a second continuous scrolling gesture on the second linear sensor array without the conductive object being released from and reapplied to the second linear sensor array to continue the second continuous scrolling gesture.

16. The apparatus of claim 15, wherein the processing device is configured to detect a scroll-right gesture on the first linear sensor array and a scroll-left gesture on the second linear sensor array.

17. The apparatus of claim 14, wherein the processing device is configured to detect the conductive object in a first position on the first linear sensor array, an initial motion of the conductive object in a first direction from the first position, and subsequent motion of the conductive object on the first linear sensor array without the conductive object being released from the sensor array, and wherein the subsequent motion includes right or left motions of the conductive object on the first linear sensor array.

18. The apparatus of claim 15, wherein the processing device is configured to implement radial slider operations using the first and second linear sensor arrays.

23. The apparatus of claim 15, wherein the means for detecting the scrolling gesture comprises means for detecting a continuous scrolling gesture on a sensor array without the conductive object being released from and reapplied to the sensor array and without the conductive object being moved in at least one rotation on the sensor array.

19. An apparatus, comprising

a processing device coupled to receive signals from a radial sensor array, wherein the processing device is configured to detect a continuous scrolling gesture on the radial sensor array without a conductive object being moved in one or more rotations of the radial sensor array.

20. The apparatus of claim 19, wherein the processing device is configured to detect a scroll-right gesture on a first portion of the radial sensor array and a scroll-left gesture on a second portion of the radial sensor array.

21. The apparatus of claim 19, wherein the processing device is configured to detect the conductive object in a first position on the radial sensor array, an initial motion of the conductive object in a first direction from the first position, and subsequent motion of the conductive object on the radial sensor array without the conductive object being released from the sensor array and without the conductive object being moved in at least one rotation of the radial sensor array, and wherein the subsequent motion includes right or left motions of the conductive object on the first linear sensor array.

22. An apparatus, comprising:

means for detecting a scrolling gesture on a sensor array when a conductive object is moved initially in a first direction and subsequently in a second direction or the first direction; and

means for detecting an end of the scrolling gesture when the conductive object is released from the sensor array.