Both 1080i and 1080p are resolution standards in Full HD display. A screen can display an image in either interlacing or progressive techniques.
Interlacing means, that TV creates images lighting pixels either even or odd lines at a time from top to bottom of the screen. In other words, TV scans pixels by skipping one line at a time and then scans the other in the next cycle.
What differentiates the1080i and 1080p is the technology specific FHD device use to display images. The ‘i’ in 1080i implies interlacing technology while ‘p’ in 1080p implies progressive technology.
In progressive technique, the screen forms an image by refreshing all pixels one by one, line by line, from top of the screen to the bottom. In other woards, image formation does not skip any line like is the case in interlacing techniques.
Which is better 1080i or 1080p?
1080p is better. This is why? Since 1080p refresh pixel without skipping lines, images in such screens are clear. Thus, devices with 1080p exhibit a better view.
Why is 1080i poor? When watching a 1080i screen, you may notice uneven screen lines. Obviously, this is not desirable when watching your favourite film.