The term "HD ready" denotes the ability of a TV to display 720p or 1080p high definition pictures, whereas Full HD indicates that the TV can handle 1080p HD images. An HD ready TV does not have a built-in TV tuner, while a full HD model may have one.
In order for a TV to qualify as HD ready, it has to be able to display at least 720 lines of resolution. In contrast, 1080p HD TVs should display 1080p video sources without any kind of distortion. A full HD TV comes with a resolution of 1920x1080 and often has an HD tuner that allows users to receive HD channels without the need of an HD TV box.