Filtering of inadvertent contact with touch pad input device

• US 8,570,280 B2
• Filed: 03/25/2009
• Issued: 10/29/2013
• Est. Priority Date: 03/25/2009
• Status: Active Grant

• Current Assignee: Lenovo PC International Limited (Lenovo Group Ltd.)
• Original Assignee: Lenovo Singapore Pte Limited (Lenovo Group Ltd.)
• Inventors: Stewart, Aaron Michael, Matsubara, Masaki, Mori, Hidetoshi
• Primary Examiner(s): Sasinowski, Andrew
• Application Number:
  US12/410,899
• Publication Number:
  US 20100245258A1
• Time in Patent Office: 1,679 Days
• Field of Search: 345173-175, 345/150, 345/179, 345/211, 178/20.03
• US Class Current: 345/173
• CPC Class Codes: G06F 3/03547 Touch pads, in which fingers can move on a surface
• CPC Class Codes: G06F 3/038 Control and interface arrangements therefor, e.g. drivers or device-embedded control circuitry
• CPC Class Codes: G06F 3/04883 for inputting data by handwriting, e.g. gesture or text

Abstract

An approach is provided that filters out inadvertent contact with a touch pad input device. A filter area is defined within a surface of a touch pad input device that is accessible from an information handling system, such as a computer system. When a user of the information handling system contacts the surface of the touch pad, an input stream is received. The input stream includes an origination point where contact was initially made by the user. If the origination point is within the defined filter area, then the input stream is filtered out (not processed). On the other hand, if the origination point is outside of the defined filter area, then the input stream is processed by the information handling system.

Claims

1. A computer-implemented method executing on an information handling system comprising:

defining a filter area within a surface of a touch pad input device accessible from the information handling system, the filter area not being solely defined based on the elapse of a period of time a user touches an area to be filtered on the touch pad input device;

receiving an input stream from the touch pad input device resulting from a user contacting the surface of the touch pad input device, wherein the input stream includes an origination point where contact was initially made by the user, and wherein the origination point includes a plurality of contacted pixels defining a first area;

retrieving a predetermined contact threshold area from a memory area accessible to the information handling system;

determining whether the origination point is inside the defined filter area by comparing a portion of the first area that is inside the defined filter area to the predetermined contact threshold area;

filtering out the input stream in response to a determination that the origination point is within the defined filter area; and

processing the input stream in response to a determination that the origination point is outside the defined filter area.

2. The method of claim 1 further comprising:

prior to receiving the input stream;

receiving at least one filter value from the user of the information handling system, wherein the at least one filter value at least partially defines the predetermined contact threshold area; and

storing the at least one filter value in the memory area accessible to the information handling system.

3. The method of claim 1 further comprising:

identifying that a button included in the information handling system is being pressed when the input stream is received; and

enlarging the defined filter area in response to identifying that the button is being pressed.

4. The method of claim 1 further comprising:

receiving at least one filter value from the user of the information handling system to at least partially establish the defined filter area; and

storing the at least one filter value in the memory area accessible to the information handling system.

5. The method of claim 1 further comprising:

prior to receiving the input stream;

retrieving a use history that tracks where on the touch pad input device one or more prior origination points have been located; and

identifying the defined filter area by comparing the retrieved use history to one or more edge areas of the surface of the touch pad input device.

6. The method of claim 1, wherein the filter area includes a first edge of the touch pad, the first edge being the edge of the touch pad nearest to the keyboard of the laptop computer, and wherein a second edge of the touch pad is at least partially outside the filter area, the second edge being optimized for directional scrolling, the touch pad being disposed on a laptop computer.

7. The method of claim 1, wherein the method includes presenting a user interface on a display device prior to receiving the input stream that includes a user-selectable option to at least partially define the predetermined contact threshold area, a user-selectable option to filter input that originates at at least one edge of the touch pad input device, and a user-selectable option to manually define at least one edge included in the filter area of the touch pad input device.

8. The method of claim 1, wherein the input stream is a first input stream, the filter area being defined at least partially based on input history of at least a second input stream that was received prior to receiving the first input stream such that the filter area is defined to be at least one area of the touch pad input device where the at least second input stream was not directed.

9. An information handling system comprising:

one or more processors;

a memory coupled to at least one of the processors;

a nonvolatile storage area coupled to at least one of the processors;

a touch pad input device accessible to at least one of the processors, the touch pad input device receiving user input at a surface of the touch pad input device; and

a set of instructions stored in the memory and executable by at least one of the processors in order to perform actions of;

defining a filter area within the surface of the touch pad input device;

receiving an input stream from the touch pad input device resulting from a user contacting the surface of the touch pad input device, wherein the input stream includes an origination point where contact was initially made by the user, and wherein the origination point includes a plurality of contacted pixels defining a first area;

retrieving a predetermined contact threshold area from a memory area accessible to the information handling system;

determining whether the origination point is inside the defined filter area by comparing a portion of the first area that is inside the defined filter area to the predetermined contact threshold area;

filtering out the input stream in response to a determination that the origination point is within the defined filter area;

processing the input stream in response to a determination that the origination point is outside the defined filter area;

wherein the filter area includes an edge of the touch pad input device used for scrolling and the instructions are executable by the processor to determine whether input received at the edge used for scrolling is for a scroll command, and responsive to determining that the input received at the edge used for scrolling is a scroll command, executing the scroll command, and responsive to determining that the input received at the edge used for scrolling is not a scroll command, filtering the input.

10. The information handling system of claim 9 further comprising additional actions of:

prior to receiving the input stream;

receiving at least one filter value from the user of the information handling system, wherein the at least one filter value at least partially defines the predetermined contact threshold area; and

storing the at least one filter value in the memory area accessible to the information handling system.

11. The information handling system of claim 9 further comprising additional actions of:

receiving at least one value from the user of the information handling system to at least partially establish the defined filter area; and

storing the at least one filter value in the memory area accessible to the information handling system.

12. The information handling system of claim 9 further comprising additional actions of:

prior to receiving the input stream;

retrieving a use history that tracks where on the touch pad input device one or more prior origination points have been located; and

identifying the defined filter area by comparing the retrieved use history to one or more edge areas of the surface of the touch pad input device.

13. The information handling system of claim 9, wherein the instructions are further executable by the processor to present a user interface on a display of the information handling system including a user-selectable option to at least partially define the predetermined contact threshold area, a user-selectable option to filter input that originates at at least one edge of the touch pad input device, a user-selectable option to only allow input at at least one edge of the touch pad input device if the input is determined to be for scrolling, a user-selectable option to filter taps received at at least one edge of the touch pad input device, and a user-selectable option to manually define at least one edge included in the filter area of the touch pad input device.

14. A computer program product stored in a computer readable storage medium that is not an electromagnetic wave, comprising functional descriptive material that, when executed by an information handling system, causes the information handling system to perform actions comprising:

defining a filter area within a surface of a touch pad input device accessible from the information handling system, the filter area not being solely defined based on the elapse of a period of time a user touches an area to be filtered on the touch pad input device;

receiving an input stream from the touch pad input device resulting from a user contacting the surface of the touch pad input device, wherein the input stream includes an origination point where contact was initially made by the user, and wherein the origination point includes a plurality of contacted pixels defining a first area;

retrieving a predetermined contact threshold area from a memory area accessible to the information handling system;

determining whether the origination point is inside the defined filter area by comparing a portion of the first area that is inside the defined filter area to the predetermined contact threshold area;

filtering out the input stream in response to a determination that the origination point is within the defined filter area; and

processing the input stream in response to a determination that the origination point is outside the defined filter area.

15. The computer program product of claim 14 wherein the functional descriptive material, when executed by the information handling system, causes the information handling system to perform further actions comprising:

identifying that a button included in the information handling system is being pressed when the input stream is received; and

enlarging the defined filter area in response to identifying that the button is being pressed.

16. The computer program product of claim 14 wherein the functional descriptive material, when executed by the information handling system, causes the information handling system to perform further actions comprising:

identifying that the input stream is an input tap that is within a tap zone defined on the touch pad input device; and

performing a predefined tap command corresponding to the tap zone in response to the input stream being outside of the defined filter area.

17. The computer program product of claim 14 wherein the functional descriptive material, when executed by the information handling system, causes the information handling system to perform further actions comprising:

prior to receiving the input stream;

retrieving a use history that tracks where on the touch pad input device one or more prior origination points have been located; and

identifying the defined filter area by comparing the retrieved use history to one or more edge areas of the surface of the touch pad input device.

18. The computer program product of claim 14 wherein the functional descriptive material, when executed by the information handling system, causes the information handling system to perform further actions comprising:

prior to receiving the input stream;

receiving at least one filter value from the user of the information handling system, wherein the at least one filter value at least partially defines the predetermined contact threshold area; and

storing the at least one filter value in the memory area accessible to the information handling system.

19. The computer program product of claim 14, wherein the filter area includes a first edge of the touch pad, the first edge being the edge of the touch pad nearest to the keyboard of the laptop computer, and wherein a second edge of the touch pad is at least partially outside the filter area, the second edge being optimized for directional scrolling, the touch pad being disposed on a laptop computer.

20. The computer program product of claim 14, wherein the functional descriptive material, when executed by the information handling system, causes the information handling system to perform the additional action of presenting a user interface on a display device prior to receiving the input stream that includes a user-selectable option to at least partially define the predetermined contact threshold area, a user-selectable option to filter input that originates at at least one edge of the touch pad input device, and a user-selectable option to manually define at least one edge included in the filter area of the touch pad input device.