Touch sensing error compensation
First Claim
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1. A touch screen comprising:
- a drive region configured to be driven by a drive signal;
a sense region disposed adjacent to the drive region, the sense region configured to output a sense signal that includes information of a first amount of touch on or near the touch screen and information of a first amount of error, wherein the first amount of touch is based on the drive signal;
a compensation sensor disposed between the drive region and the sense region, the compensation sensor configured to output a compensation signal that includes information of a second amount of error, wherein the second amount of error is based on the drive signal; and
an error compensator configured to extract the second amount of error from the compensation signal and to compensate for the first amount of error in the sense signal based on the extracted second amount of error obtained from the compensation signal.
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Abstract
Error compensation of a touch sensing signal is provided. A touch screen can include a drive region that can be driven by a drive signal, and a sense region that can output a sense signal that includes information of a first amount of touch on or near the touch screen and information of a first amount of error. The first amount of touch can be based on the drive signal. The touch screen can include a compensation sensor that can output a compensation signal that includes information of a second amount of error, and an error compensator that can compensate for the first amount of error in the sense signal based on the second amount of error.
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Citations
21 Claims
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1. A touch screen comprising:
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a drive region configured to be driven by a drive signal; a sense region disposed adjacent to the drive region, the sense region configured to output a sense signal that includes information of a first amount of touch on or near the touch screen and information of a first amount of error, wherein the first amount of touch is based on the drive signal; a compensation sensor disposed between the drive region and the sense region, the compensation sensor configured to output a compensation signal that includes information of a second amount of error, wherein the second amount of error is based on the drive signal; and an error compensator configured to extract the second amount of error from the compensation signal and to compensate for the first amount of error in the sense signal based on the extracted second amount of error obtained from the compensation signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method of compensating for error in a touch sensing signal, the method comprising:
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obtaining the touch sensing signal from a sense region disposed adjacent to a drive region, the touch sensing signal including information of a first amount of touch and information of a first amount of error, wherein the first amount of touch is based on a drive signal driving the drive region; obtaining a compensation signal from a compensation sensor disposed between the drive region and the sense region, the compensation signal including information of a second amount of error, wherein the second amount of error is based on the drive signal; extracting the second amount of error from the compensation signal; and compensating for the first amount of error in the touch sensing signal based on the extracted second amount of error obtained from the compensation signal. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21)
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Specification