When you are finished using the smartphone, but will turn OFF the panel by pressing the power key, it is an application that can be OFF the panel from the status bar without pressing the hard key.
Not a widget or app, making it possible to work from the status bar, you can panel OFF on any screen.

At the time of the lock of the screen, you will need a device administrator privileges.
If you uninstalled, from Settings → Security → Device Administrator feature, please uncheck the "panel OFF".
(The above setting names may be different depending on the model)

Icon created by the "Shortcut creation" is to distinguish it from conventional launcher icon, and the design in which the green base.