Touch-based user interface conductive rings

• US 8,686,957 B2
• Filed: 09/21/2010
• Issued: 04/01/2014
• Est. Priority Date: 11/06/2009
• Status: Active Grant

• Current Assignee: Bose Corporation
• Original Assignee: Bose Corporation
• Inventors: Rip, Bojan, Ferencz, Andrew, Carvajal, Santiago, Sakalowsky, John Michael
• Primary Examiner(s): Moorad, Waseem
• Application Number:
  US12/887,484
• Publication Number:
  US 20110109586A1
• Time in Patent Office: 1,288 Days
• Field of Search: 345173-179
• US Class Current: 345/173
• CPC Class Codes: G06F 3/03547 Touch pads, in which fingers can move on a surface

Abstract

An apparatus in which an outer conductive ring surrounds the periphery of a touch-sensitive surface of a touch sensor serving as a manually-operable control, wherein a portion of the outer conductive ring is also between the touch-sensitive surface and another manually-operable control that lacks the ability to sense the mere touch of a tip of a digit of a user. A processing device causes the level of capacitance of the outer conductive ring to be measured on a recurring basis for instances of an amount of additional capacitance above a minimum capacitance threshold, and employs such amounts of additional capacitance in a comparison to distinguish between the user interacting with a control surface defined on the touch-sensitive surface of the touch sensor or the other manually-operable control.

Claims

1. An apparatus comprising:

a casing;

a touch sensor disposed on the casing as a first manually-operable control and providing a touch-sensitive surface to enable operation of a user interface by a user of the apparatus with a tip of a digit of the user;

a second manually-operable control to sense a mere touch of the second manually-operable control by the tip, and disposed on the casing at a location in close proximity to a portion of the periphery of the touch-sensitive surface of the touch sensor;

an outer conductive ring disposed about the periphery of the touch-sensitive surface of the touch sensor enabling an approach of the tip towards at least portions of the touch-sensitive surface adjacent the periphery of the touch-sensitive surface to be detected;

a processing device able to access the touch sensor and the second manually-operable control; and

a storage accessible to the processing device and storing a sequence of instructions that when executed by the processing device, causes the processing device to;

monitor a level of capacitance of the outer conductive ring on a recurring basis for an instance of the level of capacitance of the outer conductive ring rising above a minimum capacitance threshold; and

in response to an instance of the level of capacitance of the outer conductive ring rising above the minimum capacitance threshold, employ the level of capacitance in distinguishing between an instance of the user interacting with the touch-sensitive surface of the touch sensor and an instance of the user operating the second manually-operable control.

2. The apparatus of claim 1, wherein:

the touch sensor comprises a conductive pad adjacent the periphery of the touch-sensitive surface at the portion of the periphery that is in close proximity to the second manually-operable control; and

to employ the level of capacitance of the outer conductive ring in distinguishing between an instance of the user interacting with the touch-sensitive surface of the touch sensor and an instance of the user operating the second manually-operable control, the processing device is further caused to compare the level of capacitance of the outer conductive ring rising above the minimum capacitance threshold to a level of capacitance of the conductive pad.

3. The apparatus of claim 1, wherein the touch sensor comprises a conductive pad adjacent the periphery of the touch-sensitive surface at the portion of the periphery that is in close proximity to the second manually-operable control;

the apparatus further comprises an inner conductive ring positioned within the area enclosed by the outer conductive ring such that a portion of the inner conductive ring is positioned adjacent the conductive pad in a manner in which the conductive pad is between the inner and outer conductive rings; and

to employ the level of capacitance of the outer conductive ring in distinguishing between an instance of the user interacting with the touch-sensitive surface of the touch sensor and an instance of the user operating the second manually-operable control, the processing device is further caused to employ the level of capacitance of the outer conductive ring rising above the minimum capacitance threshold together with a level of capacitance of the inner conductive ring.

4. A method comprising:

monitoring a level of capacitance of an outer conductive ring surrounding the periphery of a touch-sensitive surface of a touch sensor serving as a first manually-operable control and separating the touch-sensitive surface from a second manually-operable control on a recurring basis for an instance of the level of capacitance of the outer conductive ring rising above a minimum capacitance threshold; and

in response to an instance of the level of capacitance of the outer conductive ring rising above the minimum capacitance threshold, employing the level of capacitance in distinguishing between an instance of a user interacting with the touch-sensitive surface of the touch sensor and an instance of the user operating the second manually-operable control.

5. The method of claim 4, wherein:

the touch sensor comprises a conductive pad adjacent the periphery of the touch-sensitive surface at the portion of the periphery that is in close proximity to the second manually-operable control; and

employing the level of capacitance of the outer conductive ring in distinguishing between an instance of the user interacting with the touch-sensitive surface of the touch sensor and an instance of the user operating the second manually-operable control comprises comparing the level of capacitance of the outer conductive ring rising above the minimum capacitance threshold to a level of capacitance of the conductive pad.

6. The method of claim 4, wherein:

the touch sensor comprises a conductive pad adjacent the periphery of the touch-sensitive surface at the portion of the periphery that is in close proximity to the second manually-operable control;

the touch sensor further comprises an inner conductive ring positioned within the area enclosed by the outer conductive ring such that a portion of the inner conductive ring is positioned adjacent the conductive pad in a manner in which the conductive pad is between the inner and outer conductive rings; and

employing the level of capacitance of the outer conductive ring in distinguishing between an instance of the user interacting with the touch-sensitive surface of the touch sensor and an instance of the user operating the second manually-operable control comprises employing the level of capacitance of the outer conductive ring rising above the minimum capacitance threshold together with a level of capacitance of the inner conductive ring.