Patent ID: 9134847
Filing Date: 2015-09-15
Classification: G06F

Abstract:
1. A touch sensing system, comprising: a touch panel comprising a plurality of touch sensing units arranged in form of a matrix; a driving apparatus, electrically connected to the touch sensing units, configured to drive the touch sensing units, receive a sensing signal from each of the touch sensing units, convert each of the received sensing signals to have a digital format and output the digital sensing signals; and a processing circuit configured to receive the sensing signals outputted from the driving apparatus, define a matrix of sensing value according to values of the received sensing signals and positions of the respective touch sensing units, scan the matrix of sensing value row by row as well as sequentially scan, in a predetermined direction, values of all elements in a respective being-scanned row, and refer the first located non-zero element as a starting point of a contour of an object; the processing circuit being further configured to search the other one or more non-zero elements in a searching direction, which is initially parallel to the predetermined direction, starting from the starting point, refer the last located non-zero element in the searching direction to as an axis, scan, initially starting from the searching direction, the elements adjacent to the last located non-zero element within a predetermined angle range relative to the searching direction based on the axis, and modulate the searching direction to have a direction from the first located non-zero element within the predetermined angle range to the last located non-zero element in the searching direction before being modulated; the processing circuit being further configured to, when the starting point is scanned again, refer all the previously located non-zero elements to as a part of the contour of the object and calculating a size of the contour of the object.