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Device and method for distance detection

A technology of distance detection and distance, which is applied in the field of communication and computer processing, can solve the problem of power consumption for lighting up the screen, and achieve the effect of achieving accuracy, detecting accurately, and simplifying the process of generating digital signals

Active Publication Date: 2019-05-21
BEIJING XIAOMI MOBILE SOFTWARE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Device and method for distance detection
  • Device and method for distance detection
  • Device and method for distance detection

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Embodiment Construction

[0079] The exemplary embodiments will be described in detail here, and examples thereof are shown in the accompanying drawings. When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation manners described in the following exemplary embodiments do not represent all implementation manners consistent with the present disclosure. Rather, they are only examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0080] In related technologies, the screen area of ​​the mobile terminal is getting larger and larger, and lighting the screen consumes a lot of power. Therefore, the screen is turned off when the user is not using the screen. How to determine that the user is not using the screen. One possible implementation is to install a light sensor (such as an infrared sensor) on the front...

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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 present disclosure relates to the fields of communication and computer processing, and in particular to devices and methods 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, lighting up the screen consumes a lot of power. When the user uses the handset to make a call, there is no need to look at the screen. Turning off the screen at this time can significantly reduce power consumption. Then, how to detect whether a user uses a handset to make a call is a problem to be solved urgently. Summary of the invention [0003] To overcome the problems in the related art, the present disclosure provides a distance detection device and method. [0004] According to a first aspect of the embodiments of the present disclosure, there is pr...

Claims

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Application Information

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Patent Type & Authority Patents(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