Touch-sensitive system with motion filtering

• US 10,423,248 B2
• Filed: 07/19/2012
• Issued: 09/24/2019
• Est. Priority Date: 10/28/2011
• Status: Active Grant

• Current Assignee: Wacom Co Limited (Wacom)
• Original Assignee: Wacom Co Limited (Wacom)
• Inventors: Yilmaz, Esat, Bakken, Vemund Kval, Sundara-Rajan, Kishore
• Primary Examiner(s): Faragalla, Michael A
• Assistant Examiner(s): Shah, Sujit
• Application Number:
  US13/553,532
• Publication Number:
  US 20130106740A1
• Time in Patent Office: 2,623 Days
• Field of Search: 345173-179
• CPC Class Codes: G06F 2203/0384 Wireless input, i.e. hardware and software details of wireless interface arrangements for pointing devices
• CPC Class Codes: G06F 3/03545 Pens or stylus
• CPC Class Codes: G06F 3/038 Control and interface arrangements therefor, e.g. drivers or device-embedded control circuitry
• CPC Class Codes: G06F 3/0418 for error correction or compensation, e.g. based on parallax, calibration or alignment
• CPC Class Codes: G06F 3/04883 for inputting data by handwriting, e.g. gesture or text

Abstract

In one embodiment, computer-readable non-transitory storage media receive one or more signals based on motion of an object, a device, or both. The received signals are compared to a motion profile which defines unintended motion of the object, the device, or both, and this comparison determines whether any of the signals represent unintended motion of the stylus or device. The received signals are then processed to correct for the unintended motion defined by the motion profile.

Claims

1. A method, executed in a stylus, the method comprising:

receiving one or more signals identified as representing motion of the stylus for providing input into a device, wherein the stylus operates in one of plurality of power modes including at least a lower-power mode and a higher-power mode, wherein the higher-power mode is for transmitting a high-voltage signal to the device;

comparing the received signals to a motion profile embodied in one or more first computer-readable non-transitory storage media, the motion profile defining unintended motion of the stylus as motion with an acceleration greater than a pre-set acceleration, the pre-set acceleration being a value greater than zero;

determining, based on the motion profile, that a first portion of the received signals resulted from the unintended motion of the stylus; and

processing the received signals to correct for the unintended motion defined by the motion profile, comprising;

removing from the received signals the first portion of the received signals determined, based on the motion profile, to have resulted from unintended motion, to prevent transition from the lower-power mode to the higher-power mode; and

retaining a second portion of the received signals to trigger transition from the lower-power mode to the higher-power mode, the second portion of the received signals representing intended motion of the stylus.

2. The method of claim 1, wherein the stylus comprises one or more electrodes and one or more second computer-readable non-transitory storage media embodying logic for transmitting the high-voltage signal wirelessly to the device through a touch sensor of the device.

3. The method of claim 1, wherein the received signals are produced by an accelerometer, gyroscope, global positioning system, magnetometer, or touch-sensitive element.

4. The method of claim 1, wherein the motion profile comprises one or more durations of motion of the stylus.

5. The method of claim 1, wherein the motion profile comprises one or more temporal frequencies.

6. The method of claim 1, wherein the motion profile comprises a pre-determined motion or sequence of motions.

7. The method of claim 1, wherein the motion profile is defined by one or more of:

a user of the stylus;

characteristics appearing in or common to motion previously defined as unintended;

differences between motion-related tasks performed by the user and motion-related tasks requested of the user during a testing period;

or

a definition pre-set prior to the user'"'"'s initial use of the stylus.

8. The method of claim 1, wherein the pre-set acceleration is 1 meter per second.

9. One or more computer-readable non-transitory storage media in a stylus embodying logic operable when executed to:

receive one or more signals identified as representing motion of the stylus for providing input into a device, wherein the stylus operates in one of plurality of power modes including at least a lower-power mode and a higher-power mode, wherein the higher-power mode is for transmitting a high-voltage signal to the device;

compare the received signals to a motion profile, the motion profile defining unintended motion of the stylus as motion with an acceleration greater than a pre-set acceleration, the pre-set acceleration being a value greater than zero;

determine, based on the motion profile, that a first portion of the received signals resulted from the unintended motion of the stylus; and

process the received signals to correct for the unintended motion defined by the motion profile, comprising;

remove from the received signals the first portion of the received signals determined, based on the motion profile, to have resulted from unintended motion, to prevent transition from the lower-power mode to the higher-power mode; and

retain a second portion of the received signals to trigger transition from the lower-power mode to the higher-power mode, the second portion of the received signals representing intended motion.

10. The media of claim 9, wherein the stylus comprises one or more electrodes and one or more second computer-readable non-transitory storage media embodying logic for transmitting the high-voltage signal wirelessly to the device through a touch sensor of the device.

11. The media of claim 9, wherein the received signals are produced by an accelerometer, gyroscope, global positioning system, magnetometer, or touch-sensitive element.

12. The media of claim 9, wherein the motion profile comprises one or more durations of the motion of the stylus.

13. The media of claim 9, wherein the motion profile comprises one or more temporal frequencies.

14. The media of claim 9, wherein the motion profile comprises a pre-determined motion or sequence of motions.

15. The media of claim 9, wherein the motion profile is defined by one or more of:

a user of the stylus;

characteristics appearing in or common to motion previously defined as unintended;

differences in motion-related tasks performed by the user and motion-related tasks requested of the user during a testing period;

or

a definition pre-set prior to the user'"'"'s initial use of the stylus.

16. The media of claim 9, wherein the pre-set acceleration is 1 meter per second.

17. A stylus, comprising:

one or more first computer-readable non-transitory storage media embodying logic operable to;

receive one or more signals identified as representing motion of the stylus for providing input into a device, wherein the stylus operates in one of plurality of power modes including at least a lower-power mode and a higher-power mode, wherein the higher-power mode is for transmitting a high-voltage signal to the device;

compare the received signals to a motion profile, the motion profile defining unintended motion of the stylus as motion with an acceleration greater than a pre-set acceleration, the pre-set acceleration being a value greater than zero;

determine, based on the motion profile, that a first portion of the received signals resulted from the unintended motion of the stylus; and

process the received signals to correct for the unintended motion defined by the motion profile, comprising;

remove from the received signals the first portion of the received signals determined, based on the motion profile, to have resulted from unintended motion, to prevent transition from the lower-power mode to the higher-power mode; and

retain a second portion of the received signals to trigger transition from the lower-power mode to the higher power mode, the second portion of the received signals representing intended motion of the stylus.

18. The stylus of claim 17, comprising one or more electrodes and one or more second computer-readable non-transitory storage media embodying logic for transmitting the high-voltage signal wirelessly to the device through a touch sensor of the device.

19. The stylus of claim 17, wherein the pre-set acceleration is 1 meter per second.