HDTV have roots tracing back to the beginning of television in the 1930s but todays’ HD television sets borrow they’re technology from more recent technology developments. The term resolution is borrowed from PC monitors.
The first version of color based computing, Windows 95 relied on a screen resolution, then dubbed VGA or 640 x 480 (the standard DVD resolution), over the years as computing evolved, so did the resolutions available. Today what we consider HD has been common place for some years. The highest available resolution today is ultra high-definition which is 4320p, most HD resolutions are way below that with the 3 most common being 720p, 1080i (used for broadcasting) and Full HD 1080p. Up until late 2006, it was thought that 1080p was the highest resolution, that is until 2009 when at the largest consumer electronics show in the world, graphics manufacturer Nvidia and computer maker Dell demoed 30 inch displays with resolutions of 1440p or Extreme high definition at 2560 x 1440.
Since then several computer companies have developed and released 1440p native resolution PC monitor displays, most recently the Apple 27 inch iMac. Although there is no visible benefit of 1440p over Full HD, it has contributed and influenced the development of HD television by two main factors:
Display perception: Because HDTVs work on the perception of the human eye or the retina, a more detailed picture quality allows the eyes to feel immersed into the picture being displayed. 1440p and Full 1080 use the same aspect ratio 16:9.
Monitor Display Technologies: When Apple introduced its 27inch iMac, LED display technology came centre stage. The debate around LED and LCD has mainly been one of environmentally friendliness with LED being a clear winner. But there are some other points that make LED better than LCD, LED uses less electricity than LCD and is capable of producing a brighter more detailed picture on than the same display resolution of an LCD HDTV, which adds to the overall human retina display perception.
Today although two separate categories, HD televisions and computers still share technology and the influence of PCs on HDTVs is evident in the release of LED based HDTVs that offer a realism that is close to that of a 1440p Monitor although not entirely.
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