Wi-Fi Direct (or Wi-Di) is what you're looking for. Here is a link to a page that gives you exactly what you are looking for. It even lists the necessary components that you need in order to get it up and running.
http://askbobrankin.com/howto_connect_your_pc_to_tv_wirelessly.html As you read this, you will find that even if your TV doesn't have Wi-Di capabilities, you can add an adapter to make it so. These links are listed in the article link that I have provided, but I will list them here as well just for your convenience:
http://shop.actiontec.com/intel
http://www.amazon.com/HP-Wireless-TV-Connect/dp/B0062FZ2UA
Everything that you need to know is included in this article. Good luck with your project!