Distance Detection System, Method Thereof and Hand-Held Electronic Device

摘要

A distance detection system and method for use in a hand-held electronic device is described. The distance detection system comprises an input unit used to input at least one instruction; at least one processing device having a timing element and a calculating element; at least one signal device; and an air inspecting unit. The signal device is used to transmit a signal to a detecting object in response to the instruction, and to receive a response signal from the detecting object. The timing element is used to measure an interval between transmitting the signal and receiving the response signal. The air inspecting unit is used to detect a condition of air between the hand-held electronic device and the detecting object. The data of the detected air condition can be converted into a parameter to calculate distance data corresponding to a distance from both the parameter and the measured interval.