D. ShinFollow


This publication describes systems and techniques for enabling a touch-sensitive surface to have a very high spatial resolution while using a relatively sparse number of touch sensors. For example, the techniques of this publication may enable a touch-sensitive surface, such as a capacitive touch surface, to have a spatial resolution that is one hundred times higher than the number of touch sensors, such as capacitive touch sensors, electrodes, etc. of the touch-sensitive surface.

Because touch input provided by a finger may overlap multiple touch sensors that each outputs a capacitance value, a touch input is treated as a lump source rather than a point source. As such, a finger can be modeled as a point spread function (PSF), and the capacitance values outputted by multiple touch sensors can be mapped to a single point source using a convolutional PSF, thereby greatly increasing the spatial resolution of the touch-sensitive surface.

Creative Commons License

Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 License.