DLNA is great for playing videos on the TV and listening to music from your mobile on a stereo or a sound bar. However, if we want to visualize the whole desktop of the phone on the big screen, as we see it on our mobile, then the most recommended option passes the Miracast standard.
Miracast is a protocol that allows to send via a WiFi Direct link the screen of the mobile device in real time to a TV or compatible monitor. It came with Android 4.2 and for it to work we need the mobile or tablet to offer this possibility and the TV has WiFi and is compatible.
or you can use chromecast to connect your tv