The device that fixes a flat screen TV to a wall is known as a TV bracket. Most flat screen TVs are now designed to be mounted on the wall using a TV bracket but most sets do not come with a TV bracket as standard. And, if you do get a bracket in the box with your TV it will invariably be one that offers no movement of the set. So what can you do?
If you look online you will see that there are many different types of TV brackets that will fit your new flat screen TV. If you need to mount that TV set in the corner of the room you could choose a cantilever bracket so the TV viewing position can be adjusted as necessary. If you want to mount your TV high on the wall why not choose a tilting TV bracket? A tilting TV bracket will enable your TV to be tilted downwards by about 15 degrees so you can watch your TV and have the added bonus that there will be no glare on the screen