US Patent 10963098 Methods and apparatus for object profile estimation

This relates to methods and apparatus for estimating an object profile to improve accuracy of touch sensor panel input (e.g., reducing input position wobble for a stylus or finger translating on a surface over and between electrodes of a touch sensor panel). In some examples, the object profile estimation can begin with an initial profile estimate that can allow the object profile estimation to converge for a large range of possible input object sizes, shapes, distances, and/or orientations. The object profile information can use data from multiple frames of data acquisition as well as multiple pixels in the panel to construct the object profile estimate based on the input measurement. Specifically, the object profile can be estimated by measuring the object at various positions relative to touch pixels or nodes and gaps between touch pixels or nodes over multiple frames of sensor data and combining the measurement data of the multiple frames.