720p HD Ready TVs
720p Hd Ready TVs are the earlier type of televisions to embrace the new high definition technology. The number 720 refers to the number of horizontal lines on the display of the TV screen. The letter "p" refers to the type of scan used by the TV to display the picture, either progressive (p) or interlaced (i). Progressive scanning is considered "better" as it displays the entire image within 1/60th of a second. Interlaced scanning will display alternating sets of lines resulting in an inferior picture display.
The actual resolution of 720p Hd TVs is 1280 x 720 which means 1280 pixels by 720 lines with progressive scan. Also known as "HD TV" or "HD Ready TVs", compared to analogue TVs, the resolution is twice that of an analogue TV. You will find variants of this orignal HDTV technology with vertical resolution of 720 lines with progressive scanning (720p) or 1080 lines with interlaced scanning (1080i).
The difference between 720p and 1080i is marginal when viewing, as 720p has lower vertical resolution than 1080i, but with progressive scanning producing a far better picture than interlaced scanning, the 1080i will produce a poorer quality image than 720p, even though it has higher vertical resolution.
Since the introduction of 1080p Full HD TVs and more recently 4K Ultra Hd TVs, the prices of 720p HD TVs have dropped dramatically as they are no longer the newest technology. Which makes it a good time to grab a great deal on a new HD TV.