Originally, computer monitors were used for data processing while television receivers were used for entertainment. From the 1980s onwards, computers (and their monitors) have been used for both data processing and entertainment, while televisions have implemented some computer functionality. The common aspect ratio of televisions, and then computer monitors, has also changed from 4:3 to 16:9 (and 16:10).
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[edit] Technologies
Further information: Comparison CRT, LCD, Plasma and History of display technology
Different image techniques have been used for Computer monitors.
Until the 21st century most monitors were CRT but they have been phased
out for LCD monitors.[edit] Cathode ray tube
Main article: Cathode ray tube
CRT remained the standard for computer monitors through the 1990s. CRT technology remained dominant in the PC monitor market into the new millennium partly because it was cheaper to produce and offered viewing angles close to 180 degrees.[2]
[edit] Liquid Crystal
Main article: Liquid crystal display
There are multiple technologies that have been used to implement Liquid Crystal Displays
(LCDs). Throughout the 1990s the primary use of LCD technology as
computer monitors was in laptops where the lower power consumption,
lighter weight, and smaller physical size of LCDs justified the higher
price versus a CRT. Commonly, the same laptop would be offered with an
assortment of display options at increasing price points: (active or
passive) monochrome, passive color, or active matrix color (TFT). As
volume and manufacturing capability have improved, the monochrome and
passive color technologies were dropped from most product lines.TFT is a variant of liquid crystal display (LCD) which is now the dominant technology used for computer monitors.[3]
The first standalone LCD displays appeared in the mid 1990s selling for high prices. As prices declined over a period of years they became more popular, and by 1997 were competing with CRT monitors. Among the first desktop LCD computer monitors was the Ezio L66 in the mid-1990s, the Apple Studio Display in 1998, and the Apple Cinema Display in 1999. In 2003 TFT LCDs outsold CRTs for the first time, becoming the primary technology used for computer monitors.[2] The main advantages of LCDs over CRT displays are that LCDs consume less power, take up much less space, and are considerably lighter. The now common active matrix TFT-LCD technology also has less flickering than CRTs, which reduces eye strain.[4] On the other hand, CRT monitors have superior contrast, have superior response time, are able to use multiple screen resolutions natively, and there is no discernible flicker if the refresh rate is set to a sufficiently high value. LCD monitors have now very high temporal accuracy and can be used for vision research.[5]
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