Whether or not you have enabled password protection for your iPad, it will automatically lock after a certain period of activity; the locked state simply means that your screen will first dim after a period of inactivity, and the display will be turned off, requiring you to slide to unlock the iPad. This is a useful feature in that it not only saves energy (and battery life, if your iPad is not connected to a power source), but it also prevents capturing accidental touches after the iPad is locked. Let's see how to configure the Auto-Lock feature.
Follow these steps to access the Auto-Lock options on your iPad:
Click on the "Home" button, and flick through Home screens until you find the "Settings" icon: then tap on it.You can change your Auto-Lock setting at any time, and it will be remembered by your iPad, even if you restart it. To combine protection with Auto-Lock, read the next tutorial, which explains how to add a password to your iPad (as well as changing it or removing password-protection).