SENSOR-BASED TOUCHSCREEN ASSEMBLY, HANDHELD PORTABLE ELECTRONIC DEVICE HAVING ASSEMBLY, AND METHOD OF DETERMINING TOUCH LOCATION ON A DISPLAY PANEL

摘要

A sensor-based touchscreen assembly for use with a display panel is configured to determine a location on the display panel touched by a user. The sensor-based touchscreen assembly employs at least three sensors mounted on the display panel at different locations. The sensor-based touchscreen assembly further includes a controller coupled to the sensors. The controller is operable to determine a location on the display panel touched by a user by computing a time of difference of arrival (TDOA) of a signal (mechanical or sound wave) emitted from a touch to the sensors.