SmartAppz, the people behind what many would describe as the crown stealing AppMan have released SmartDisplay and the price is so low, you can afford to register this even if you don't own a 9200 device....

For only $2.95, you can have full control over the display's backlight by switching it off or permanently on, by use of a hotkey.

Click on the link above (affiliate link) to download a demo and/or register.