There are many makers of LCD enclosures that can be used outdoors, however if you are locating a domestic TV outside make sure you have the right unit - make sure you don't acquire a digital signage casing.
LCD Enclosures For Open-air Electronic Signage.
The out-of-doors dynamic signage casing is designed to be fastened either directly to wall or suspended from a ceiling mount, high up for the best viewing point, normally this is above everyone's heads, so normally engineers who needs to get into the housing for updating systems or software has to use either a ladder or a scissor lift.
The cases are secured by an industry quality lock, due to the units being deployed high up out of reach of unauthorized personal, these units provide the necessary waterproof protection.
Anti Vandal LCD Enclosures .
Unlike any other LCD enclosure on the market, this unit is locked by high security locks, what ever you do if it is for vandal security, do not purchase a unit with standard cam locks, as these can be opened without problems with a chisel.
You need to look for a unit that is made from thicker material so it does separate it from the other products such as digital signage units. The finish is a special anti vandal spray that stops any delinquent spraying the housings with spray paint. The viewing window is supplied in thicknesses depending upon the function and for vandal proof a thickness of 10 mm (3/8") viewing window ought to be used, this can resist a baseball assault or a 500g ball bearing being dropped from 1 metre.
The last point to think about on this range of enclosure is the housings can have a master key, this prevents the installer having to have a large bunch of keys to test and update software on a electronic advertising network and just picture if he has forgot the key and drives 200 miles to site only to find out the mistake! This will not happen with this range, as one manufacturer provides a master key, it does not matter if there are nine LCD enclosures or 500 enclosures in the outside electronic marketing network as they will all be opened with one high security key.
The best anti vandal LCD casing has the capability to slow down any tried theft and some are outfitted with a wireless web cam to note an "incident" when it happens.