Computer device with digitizer calibration system and method

• US 8,712,717 B2
• Filed: 09/30/2005
• Issued: 04/29/2014
• Est. Priority Date: 09/30/2005
• Status: Active Grant

• Current Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Original Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Inventors: Homer, Steven S., Mohi, Pasha, Love, James Scott
• Primary Examiner(s): COSIMANO, EDWARD R
• Application Number:
  US11/241,536
• Publication Number:
  US 20070075988A1
• Time in Patent Office: 3,133 Days
• Field of Search: 73/761.1, 73/763.9, 73/10.1, 73/18.8, 734/321, 738/658, 738/659, 738/663, 702/1, 702/57, 702/75, 702/78, 702/85, 702/90, 702/91, 702/127, 702/189, 702/66, 702/88, 702/94, 702/95, 702/104, 702/106, 702/107, 702/187, 709/200, 709/220, 709/227, 709/228, 709/230, 710/16, 710/62, 710/67, 710/72, 710/73, 710/1, 710/15, 710/65, 713/1, 713/2, 713/100, 324/76.11, 324/76.39
• US Class Current: 702/107
• CPC Class Codes: G01D 18/002 Automatic recalibration G01D18/008 takes precedence
• CPC Class Codes: G01R 23/15 Indicating that frequency of pulses is either above or below a predetermined value or within or outside a predetermined range of values, by making use of non-linear or digital elements (indicating that pulse width is above or below a certain limit)
• CPC Class Codes: G06F 13/00 Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units interface circuits for specific input/output devices G06F3/00 ; multiprogram control therefor G06F9/46; multiprocessor systems G06F15/16
• CPC Class Codes: G06F 3/038 Control and interface arrangements therefor, e.g. drivers or device-embedded control circuitry
• CPC Class Codes: G06F 3/041 Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
• CPC Class Codes: G06F 3/0418 for error correction or compensation, e.g. based on parallax, calibration or alignment
• CPC Class Codes: G06F 3/0488 using a touch-screen or digitiser, e.g. input of commands through traced gestures
• CPC Class Codes: G16Z 99/00 Subject matter not provided for in other main groups of this subclass
• CPC Class Codes: H04B 17/12 of transmit antennas, e.g. of the amplitude or phase

Abstract

A computer device comprises a calibration module adapted to detect an input frequency for at least one input mode of a digitizer device. The calibration module is configured to determine whether the input frequency is within a frequency tolerance band corresponding to the at least one input mode.

Claims

1. A computer system, comprising:

at least one processor; and

a calibration module comprising stored instructions executable by the at least one processor to;

receive an indication of an input mode of a digitizer device that corresponds to a manner of providing input from the digitizer device to the computer system;

detect a frequency of an input signal from the digitizer device in the input mode;

determine whether the frequency of the input signal falls outside a frequency tolerance band corresponding to the input mode, the frequency tolerance band defining a band of frequencies in which an input is expected for the input mode; and

in response to determining that the frequency of the input signal falls outside the frequency tolerance band, adjust the frequency tolerance band to include the frequency of the input signal.

2. The computer system of claim 1, wherein the calibration module is executable to cause display, on a display device connected to the computer system, a prompt requesting actuation of the digitizer device in the input mode.

3. The computer system of claim 1, wherein adjusting the frequency tolerance band comprises shifting the frequency tolerance band to center the frequency of the input signal within the frequency tolerance band.

4. The computer system of claim 1, wherein the calibration module is executable to initiate calibration of the computer system to the digitizer device pursuant to a predetermined schedule.

5. The computer system of claim 1, wherein the calibration module is executable to initiate calibration of the computer system to the digitizer device in response to a user input.

6. A digitizer calibration method, comprising:

receiving, by a computer device, an indication of an input mode of a digitizer device that corresponds to a manner of providing input from the digitizer device to the computer system;

detecting, by the computer device, a frequency of an input signal from the digitizer device in the input mode;

determining, by the computer device, whether the frequency of the input signal falls outside a frequency tolerance band corresponding to the input mode, the frequency tolerance band defining a band of frequencies in which an input is expected for the input mode; and

in response to determining that the frequency of the input signal falls outside the frequency tolerance band, modifying, by the computer device, the frequency tolerance band to include the frequency of the input signal.

7. The method of claim 6, further comprising displaying a prompt requesting actuation of the digitizer device in the input mode.

8. The method of claim 6, further comprising automatically initiating calibration of the computer device to the digitizer device pursuant to a predetermined schedule.

9. The method of claim 6, further comprising initiating calibration of the computer device to the digitizer device in response to a user input.

10. The method of claim 7, further comprising displaying a prompt requesting actuation of a different input mode of the digitizer device.

11. A computer device, comprising:

an interface for communicating to a digitizer device;

at least one processor; and

a calibration module comprising stored instructions executable by the at least one processor to;

receive an indication of a selected one of a plurality of different input modes of the digitizer device that correspond to different manners of providing input from the digitizer device to the computer device, wherein the different input modes correspond to respective different frequency tolerance bands, each of the frequency tolerance bands defining a band of frequencies in which an input is expected for the corresponding one of the input modes;

detect a frequency of an input signal from the digitizer device in the selected input mode;

determine whether the frequency of the input signal is within the frequency tolerance band corresponding to the selected input mode; and

in response to the determining, adjust the frequency tolerance band corresponding to the selected input mode to include the frequency of the input signal.

12. The computer device of claim 11, wherein the calibration module is executable to cause display, on a display device of the computer device, a prompt requesting actuation of the digitizer device in the input mode.

13. The computer device of claim 11, wherein the calibration module is executable to request actuation of a different input mode of the digitizer device.

14. The computer device of claim 11, wherein the adjusting comprises centering the frequency of the input signal within the frequency tolerance band.

15. The computer device of claim 11, wherein the calibration module is executable to initiate calibration of the computer device to the digitizer device pursuant to a predetermined schedule.

16. The computer device of claim 11, wherein the calibration module is executable to initiate calibration of the computer device to the digitizer device in response to a user input.

17. The computer device of claim 11, wherein the at least one processor is configured to further:

receive a further input signal having a given frequency from the digitizer device; and

identify an input mode from among the different input modes of the digitizer device based on which of the different frequency tolerance bands the given frequency falls into.

18. The computer device of claim 11, wherein the calibration module is executable to perform a calibration operation including the receiving, the detecting, the determining, and the adjusting, in response to a calibration request.

19. The computer device of claim 18, wherein the calibration module is executable to, in response to the calibration request, display a prompt in a display device of the different input modes, and wherein the received indication of the selected input mode is responsive to user selection of one of the different input modes in the displayed prompt.

20. The computer device of claim 19, wherein the calibration module is executable to:

identify a type of the digitizer device; and

determine types of input modes for the identified type of the digitizer device, wherein the different input modes in the displayed prompt correspond to the determined types of input modes.

21. A non-transitory computer-readable medium having stored thereon an instruction set to be executed, the instruction set, when executed by a computer device, causes the computer device to:

receive an indication of a selected one of a plurality of different input modes of the digitizer device that correspond to different manners of providing input from the digitizer device to the computer device, wherein the different input modes correspond to respective different frequency tolerance bands, each of the frequency tolerance bands defining a band of frequencies in which an input is expected for the corresponding one of the input modes;

detect a frequency of an input signal from the digitizer device in the selected input mode;

determine whether the frequency of the input signal is within the frequency tolerance band corresponding to the selected input mode; and

in response to the determining, adjust the frequency tolerance band corresponding to the selected input mode to include the frequency of the input signal.

22. The computer-readable medium of claim 21, wherein the adjusting comprises centering the frequency of the input signal within the frequency tolerance band corresponding to the selected input mode.

23. The computer-readable medium of claim 21, wherein the instruction set, when executed by the computer device, causes the computer device to calibrate the computer device to recognize signals from the digitizer device based at least in part on the adjusted frequency tolerance band.

24. The computer-readable medium of claim 21, wherein the instruction set, when executed by the computer device, causes the computer device to initiate calibration of the computer device to the digitizer device in response to a user input or to a predetermined schedule.