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Distance detection device and method

A distance detection and distance technology, applied in the field of communication and computer processing, can solve the problem of power consumption of lighting the screen, and achieve the effect of accurate, simplified process of generating digital signals, and improved quality.

Active Publication Date: 2017-05-31
BEIJING XIAOMI MOBILE SOFTWARE CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Especially for full-screen mobile terminals, turning on the screen consumes a lot of power

Method used

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  • Distance detection device and method
  • Distance detection device and method

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Embodiment Construction

[0079] Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatuses and methods consistent with aspects of the present disclosure as recited in the appended claims.

[0080] In related technologies, the screen area of ​​a mobile terminal is getting larger and larger, and power consumption is very high for turning on the screen. Therefore, turn off the screen when the user is not using it. How to make sure the user is not using the screen. A possible implementation manner is to install a photosensitive sensor (such as an infrared sensor) on the fro...

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Abstract

The invention discloses a distance detection device and method and is used for providing a distance detection realization mode and improving the accuracy of a detection result. The device comprises an audio transmitter with the use of a piezoelectric ceramic used for emitting ultrasonic waves, a first audio receiver which is used for receiving the ultrasonic waves, a second audio receiver which is used for receiving the ultrasonic waves, a first converter which is connected to the first audio receiver and is used for obtaining the ultrasonic waves and generating a first digital signal according to ultrasonic waves received in every two consecutive times, a second converter which is connected to the second audio receiver and is used for obtaining the ultrasonic waves and generating a second digital signal according to ultrasonic waves received in every two consecutive times, and a processor which is used for calculating a first distance and a second distance according to the first digital signal and the second signal and determining whether an object is in a preset direction according to the first distance and the second distance.

Description

technical field [0001] The disclosure relates to the fields of communication and computer processing, and in particular to a device and method for distance detection. Background technique [0002] With the development of electronic technology, mobile terminals have been widely used. The energy saving of mobile terminals has always been the focus of attention in the industry. Especially for a full-screen mobile terminal, turning on the screen consumes a lot of power. When the user uses the earpiece to make a call, he does not need to look at the screen, and turning off the screen at this time can significantly reduce power consumption. Then, how to detect whether the user uses the handset to make a call is an urgent problem to be solved. Contents of the invention [0003] In order to overcome the problems existing in related technologies, the present disclosure provides a distance detection device and method. [0004] According to a first aspect of an embodiment of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S15/08G01S15/04H04M1/03H04M1/725H04W52/02
CPCG01S15/04G01S15/08H04M1/03H04W52/027H04M1/72463Y02D30/70
Inventor 项吉
Owner BEIJING XIAOMI MOBILE SOFTWARE CO LTD
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