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Reverse battery protection device and operating method thereof

  • US 10,088,807 B2
  • Filed: 08/07/2017
  • Issued: 10/02/2018
  • Est. Priority Date: 10/08/2014
  • Status: Active Grant
First Claim
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1. A wearable device comprising:

  • a main body;

    a display located at a front side of the main body and configured to display information;

    a heartbeat sensor located below the display and located at a rear side of the main body, wherein the heartbeat sensor comprises a light emitting unit and a light receiving unit, and wherein the heartbeat sensor is configured to detect a heartbeat using the light emitting unit and the light receiving unit; and

    a controller operably coupled with the display and the heartbeat sensor, wherein the controller is configured to;

    display, on the display, a lock screen representing a lock state;

    identify a wearing state of the wearable device and a non-wearing state of the wearable device using the light emitting unit and the light receiving unit;

    change the lock state of the wearable device to a lock released state of the wearable device in response to receiving of a lock release command after identifying that the wearable device is in the wearing state;

    display a lock released screen if the display is turned on after the display is turned off while the wearable device is in the wearing state;

    change the lock state to the lock released state in response to receiving of the lock release command after identifying that the wearable device is in the non-wearing state; and

    display the lock screen if the display is turned on after the display is turned off while the wearable device is in the non-wearing state.

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