Terminal equipment

Abstract

The invention relates to terminal equipment, which comprises an ultrasonic transmitting module, an ultrasonic receiving module and a processing module. The terminal device is arranged such that the ultrasound transmitting module transmits ultrasound signals; the ultrasonic receiving module receives the ultrasonic signals through air; the processing module acquires a current state of the terminal equipment, wherein the state comprises a departing state and an approaching state; in the departing state, the processing module detects a first characteristic value of the received ultrasonic signals,determines whether a predetermined threshold value is reached, and uses the detection to determine whether to transition to the approaching state; in the approaching state, the processing module detects a second characteristic value of the received ultrasonic signals, determines whether a predetermined threshold value is reached, and uses the detection to determine whether to transition to the departing state.

Description

technical field [0001] The invention belongs to the technical field of terminal communication, and relates to a terminal device, in particular, the terminal device uses ultrasonic signals to control the state of the terminal device. Background technique [0002] In terminal equipment based on screen touch technology, proximity sensing is an important anti-mistouch function. Traditional terminal devices, such as mobile phones, implement proximity sensing through infrared proximity sensing. It judges the size of the received reflected infrared energy to judge whether it is approaching or leaving. The disadvantage of this solution is that it is impossible to track and measure moving objects. At the same time, under the background that smart devices continue to increase the screen-to-body ratio, the infrared proximity sensor will occupy additional material costs and the space on the front of the mobile phone, affecting the screen-to-body ratio. promote. [0003] The tradition...

AI Technical Summary

Problems solved by technology

Since the transmitted signal and the echo signal cannot overlap in the time domain, there will be a blind area of ​​the ranging distance, which will affect the accuracy of short-distance ranging

In addition, the transmitted ultrasonic signal contains audio components, which will interfere with the audio range of the sound emitting device, and is not suitable for terminal equipment with voice or call functions.

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