LG LGD150 用户手册

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页码 222
26
Knock Code
You can unlock the screen when screen is off by taping the correct area and sequence.
To activate Knock Code feature
Press
 >
>
Apps tab > Settings > Display tab > Lock screen > Select 
screen lock > Knock Code.
This opens a screen that will guide you through how to select the unlock sequence.
You have to create a Backup PIN as a safety measure in case you forget your unlock
sequence.
TIP: Double-tap to turn the screen on when Knock Code is not in use.
KnockOn
You can turn on/off the screen by just double-tap.
To activate KnockON feature
Press
 >
>
Apps tab > Settings > General tab > Gestures.
Place a checkmark on
Screen on/off.
Double-tap the center screen quickly to unlock the screen. To lock the screen, double-tap the
status bar in any screen (except on the camera viewfinder) or empty area on the Home screen.
NOTE: When turning the screen on, make sure you do not cover the 
proximity sensor. Doing so will turn the screen off immediately after turning it 
on in order to prevent abnormal turning on in your pocket or bag.