This app allows you set password for lock screen by emoticon password:
+ You will select 10 emoticons available. And you select 4 from 10 emoticons that to set emotion password, confirm and REMEMBER 4 emotions this to unlock device.
+ You can choose wallpaper for lock screen, from wallpapers available or select from gallery or take a photo with camera.
+ You can view widget on lock screen, change text color, text font and special thing is you can add welcome note to screen lock
+ You can set time to lock device after screen off.