Fast multi-touch post processing
US-9158411-B2 · Oct 13, 2015 · US
Fast multi-touch post processing
US9529476B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9529476-B2 |
| Application number | US-201514881873-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 13, 2015 |
| Priority date | Jul 12, 2013 |
| Publication date | Dec 27, 2016 |
| Grant date | Dec 27, 2016 |
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Abstract
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In a low-latency touch-sensitive device, post-processing is performed to convert a two-dimensional map of signal strengths into usable touch events. Four such post-processing procedures are disclosed: field flattening, touch point detection, interpolation and touch point matching between frames. The field flattening procedure subtracts an offset to remove crosstalk between rows and columns, and compensates for differences in amplitude between particular row/column combinations due to attenuation. The touch point detection procedure computes coarse touch points by finding local maxima in the flattened signal. The interpolation procedure computes fine touch points from the coarse touch points. In an embodiment, such interpolation is done by fitting the coarse touch points to a paraboloid. The frame matching procedure matches the calculated touch points to each other across frames.
First claim
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What is claimed is: 1. A low-latency touch sensitive device, comprising: first and second pluralities of conductors, arranged such that each of the paths of the conductors of the first plurality of conductors cross each of the paths of the conductors of the second plurality of conductors; at least one signal processor adapted to process signals present on each of the second plurality of conductors, and for each of the signals present on each of the second plurality of conductors…
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Physics · mapped topic
- G06F3/0418Primary
Physics · mapped topic
Physics · mapped topic
Physics · mapped topic
Physics · mapped topic
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- What does patent US9529476B2 cover?
- In a low-latency touch-sensitive device, post-processing is performed to convert a two-dimensional map of signal strengths into usable touch events. Four such post-processing procedures are disclosed: field flattening, touch point detection, interpolation and touch point matching between frames. The field flattening procedure subtracts an offset to remove crosstalk between rows and columns, and…
- Who is the assignee on this patent?
- Tactual Labs Co
- What technology area does this patent fall under?
- Primary CPC classification G06F3/0418. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Dec 27 2016 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 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).