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Detection of a conductive object during an initialization process of a touch-sensing device
US8941393B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8941393-B2 |
| Application number | US-201113218090-A |
| Country | US |
| Kind code | B2 |
| Filing date | Aug 25, 2011 |
| Priority date | Jan 14, 2011 |
| Publication date | Jan 27, 2015 |
| Grant date | Jan 27, 2015 |
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Abstract
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A method and system for detecting a presence of a conductive object proximate to a capacitive sense element during an initialization process of a touch-sensing device. A reference sense element is calibrated to produce a sensing parameter value. A capacitance of a plurality of capacitive sense elements is measured based on the sensing parameter value, and compared to a baseline capacitance value stored in a non-volatile memory of the touch-sensing device. The presence of a conductive object proximate to a capacitive sense element is detected when a difference between the measured capacitance and the stored baseline capacitance value is greater than a threshold value.
First claim
Opening claim text (preview).
What is claimed is: 1. A method, comprising: during an initialization process of a touch-sensing device: measuring a capacitance of a reference sense element disposed on a second side of a printed circuit board of the touch-sensing device, wherein the measured capacitance is responsive to an environmental condition and is not responsive to a conductive object, comparing the measured capacitance of the reference sense element to a target measurement output value, and calibrati…
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- G01R27/2605Primary
Physics · mapped topic
Physics · mapped topic
Physics · mapped topic
Physics · mapped topic
Physics · mapped topic
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- What does patent US8941393B2 cover?
- A method and system for detecting a presence of a conductive object proximate to a capacitive sense element during an initialization process of a touch-sensing device. A reference sense element is calibrated to produce a sensing parameter value. A capacitance of a plurality of capacitive sense elements is measured based on the sensing parameter value, and compared to a baseline capacitance valu…
- Who is the assignee on this patent?
- Young Kristopher L, Cypress Semiconductor Corp
- What technology area does this patent fall under?
- Primary CPC classification G01R27/2605. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Jan 27 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).