Method and apparatus for improving power consumption on a touch device

Patent metadata

Field	Value
Publication number	US-9507407-B2
Application number	US-201414540859-A
Country	US
Kind code	B2
Filing date	Nov 13, 2014
Priority date	Feb 21, 2014
Publication date	Nov 29, 2016
Grant date	Nov 29, 2016

Abstract

Lower report rates are desirable in touch devices to minimize power consumption. However, lower report rates lead to inaccurate and untimely depiction of a user's touch inputs on a touch display device. Disclosed are methods and apparatus for using a lower report rate; while maintaining substantially the same or better user experience achieved by using a higher report rate.

First claim

What is claimed is:

1. An apparatus for generating touch inputs, comprising:
a touch device; and
a processor configured to:
receive, from the touch device, data representing a sensed time and sensed location on the touch device of each of a plurality of sensed touch inputs;
generate a model of the sensed touch inputs by calculating a best fit for parameters of an upsampling function based on the sensed location and sensed time of at least some of the plurality of the sensed touch inputs;
upsample the sensed touch inputs using the model to generate at least one additional touch input at a point of the upsampling function corresponding to a time at which there is no sensed touch input and which is after a sensed time of a most recent sensed touch input of the plurality of sensed touch inputs, the point corresponding to an additional location on the touch device; and
display a visual representation of
the sensed touch inputs at the sensed locations on the touch device, and
the at least one additional touch input at the additional location on the touch device.

2. The apparatus of claim 1 , wherein the processor is further configured to generate the model of the sensed touch inputs by fitting a curve to the at least some of the plurality of sensed touch inputs.

3. The apparatus of claim 1 , wherein the processor is further configured to generate a model of the sensed touch inputs using linear regression to calculate the best fit for the parameters of the upsampling function.

4. The apparatus of claim 1 , wherein the processor is further configured to generate the model of the sensed touch inputs by minimizing a mean square error between the sensed touch inputs and the generated at least one additional touch input.

5. The apparatus of claim 1 , wherein the processor is further configured to generate the model of the sensed touch inputs using a quadratic equation.

6. The apparatus of claim 1 , wherein the at least some of the plurality of sensed touch inputs used to calculate the best fit for the parameters of the upsampling function is the most recent ten or fewer sensed touch inputs received from the touch device.

7. The apparatus of claim 1 , wherein the touch device comprises either a capacitive touch panel or a resistive touch panel.

8. A method of generating touch inputs, comprising:
receiving, from the touch device, data representing a sensed time and sensed location on the touch device of each of a plurality of sensed touch inputs;
generating a model of the sensed touch inputs by calculating a best fit for parameters of an upsampling function based on the sensed location and sensed time of at least some of the plurality of the sensed touch inputs;
upsampling the sensed touch inputs using the model to generate at least one additional touch input at a point of the upsampling function corresponding to a time at which there is no sensed touch input and which is after a sensed time of a most recent sensed touch input of the plurality of sensed touch inputs, the point corresponding to an additional location on the touch device; and
displaying a visual representation of
the sensed touch inputs at the sensed locations on the touch device, and
the at least one additional touch input at the additional location on the touch device.

9. The method of claim 8 , wherein generating the model of the sensed touch inputs comprises fitting a curve to the at least some of the plurality of sensed touch inputs.

10. The method of claim 8 , wherein generating the model of the sensed touch inputs comprises using linear regression to calculate the best fit for the parameters of the upsampling function.

11. The method of claim 8 , wherein generating the model of the sensed touch inputs comprises minimizing a mean square error between the sensed touch inputs and the generated at least one additional touch input.

12. The method of claim 8 , wherein generating the model of the sensed touch inputs comprises using a quadratic equation.

13. The method of claim 8 , wherein the at least some of the plurality of sensed touch inputs used to calculate the best fit for the parameters of the upsampling function is the most recent ten or fewer sensed touch inputs received from the touch device.

14. The method of claim 8 , wherein displaying the at least one additional touch input occurs prior to receiving data representing a next touch input occurring after the plurality of sensed touch inputs.

15. The method of claim 14 , further comprising updating the model after receiving the data representing the next touch input.

16. An apparatus for generating touch inputs, comprising:
means for receiving, from the touch device, data representing a sensed time and sensed location on the touch device of each of a plurality of sensed touch inputs;
means for generating a model of the sensed touch inputs by calculating a best fit for parameters of an upsampling function based on the sensed location and sensed time of at least some of the plurality of the sensed touch inputs;
means for upsampling the sensed touch inputs using the model to generate at least one additional touch input at a point of the upsampling function corresponding to a time at which there is no sensed touch input and which is after a sensed time of a most recent sensed touch input of the plurality of sensed touch inputs, the point corresponding to an additional location on the touch device; and
means for displaying a visual representation of
the sensed touch inputs at the sensed locations on the touch device, and
the at least one additional touch input at the additional location on the touch device.

17. The apparatus of claim 16 , wherein means for generating the model of the sensed touch inputs comprise means for fitting a curve to the at least some of the plurality of sensed touch inputs.

18. The apparatus of claim 16 , wherein means for generating the model of the sensed touch inputs comprise means for using linear regression to calculate the best fit for the parameters of the upsampling function.

19. The apparatus of claim 16 , wherein means for generating the model of the sensed touch inputs comprise means for minimizing a mean square error between the sensed touch inputs and the generated at least one additional touch input.

20. The apparatus of claim 16 , wherein means for generating the model of the sensed touch inputs comprise means for using a quadratic equation.

21. The apparatus of claim 16 , wherein the at least some of the plurality of sensed touch inputs used to calculate the best fit for the parameters of the upsampling function is the most recent ten or fewer sensed touch inputs received from the touch device.

22. A non-transitory computer storage that stores executable program instructions that direct a wireless communications device to perform a process that comprises:
receiving, from the touch device, data representing a sensed time and sensed location on the touch device of each of a plurality of sensed touch inputs;
generating a model of the sensed touch inputs by calculating a best fit for parameters of an upsampling function based on the sensed location and sensed time of at least some of the plurality of the sensed touch inputs;
upsampling the sensed touch inputs using the model to generate at least one additional touch input at a point of the upsampling function corresponding to a time at which there is no sensed touch input and which is after a sensed time of a most recent sensed touch input of the plurality of s

Assignees

• Qualcomm Inc

Inventors

• Ng Teresa Ka Ki
• Huang William Yee-Ming
• Gao Qiang
• Wong Hsun Wei David
• Law Carol King Mui
• Wang Rex
• Jalil Suhail
• Tilak Raghukul
• Ahmed Mohamed Imtiaz

Classifications

• G06F3/044

  by capacitive means · CPC title

• G06F1/3215

  Monitoring of peripheral devices · CPC title

• G06F3/045

  using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact · CPC title

• G06F1/3262 Primary

  Power saving in digitizer or tablet · CPC title

• G06F3/0416 Primary

  Control or interface arrangements specially adapted for digitisers · CPC title