Method for the operator control of a matrix touchscreen

摘要

A method for the operation of a capacitive, matrix touchscreen for use in a motor vehicle, wherein touching the matrix touchscreen in the region of a matrix element produces a signal level associated with the matrix element, wherein the extent of a signal level which is produced by touching the matrix touchscreen in the region of the matrix element and which is associated with the matrix element is altered, and wherein the thus modified signal levels of two adjacent matrix elements are taken as a basis for determining whether the two matrix elements are being touched as part of collective areal touching of the matrix touchscreen.

主权项

1. A method for operating a capacitive, matrix touch screen, for use in a motor vehicle, wherein touching the matrix touch screen in the region of a matrix element prompts a signal level associated with the matrix element to be produced, the method comprising:
modifying the signal level associated with the matrix element which is produced when the matrix touch screen is touched in the region of the matrix element such that the signal level is increased when this signal level exceeds an upper signal level limit value; is decreased when this signal level is below a lower signal level limit value; is scaled when this signal level is below the upper signal level limit but exceeds the lower signal level limit value, wherein the modified signal levels of two adjacent matrix elements are taken as a basis for determining whether the two matrix elements have been touched as part of a joint two-dimensional touch of the matrix touch screen.