The QS-ScreenOn application is a simple utility that will keep your screen locked on when the device is plugged in to a charger. When the device is unplugged the screen lock will be released and it will obey the normal Android screen dimming preferences.
There is no user interface, or preferences or other options. Once installed, you will need to launch the application. If your device is plugged in, then you will see a notification that the application is active and a toast that the screen lock is being acquired.
If you want the screen to allow dimming when plugged in you will need to bring down the notification drawer and select the QS-ScreenOn notification. This will disable the screen lock. If you want to enable the screen lock, then you need to launch the application again, or unplug and then plug the charging cable back in.
The only way to totally disable the screen lock behavior is to un-install.
NOTE: This is a very simple app, which does one thing. There will not be an enhanced version.