LCD television

thumb|right|An LCD TV

A liquid-crystal-display television (LCD TV) is a television set that uses a liquid-crystal display to produce images. It is by far the most widely produced and sold type of television display. LCD TVs are thin and light, but have some disadvantages compared to other display types, such as high power consumption, poorer contrast ratio, and inferior color gamut.

LCD TVs rose in popularity in the early years of the 21st century, and exceeded sales of cathode-ray-tube televisions worldwide from late 2007 on. In 1984, Epson released the ET-10, the first full-color pocket LCD television. That same year Citizen Watch introduced the Citizen Pocket TV, a 2.7-inch color LCD TV, with the first commercial TFT LCD.

Throughout this period, screen sizes over 30" were rare, as these formats would start to appear blocky at normal seating distances when viewed on larger screens. LCD projection systems were generally limited to situations where the image had to be viewed by a larger audience. At the same time, plasma displays could easily offer the performance needed to make a high-quality display, but suffered from low brightness and very high power consumption. Still, some experimentation with LCD televisions took place during this period. In 1988, Sharp introduced a 14-inch active-matrix full-color full-motion TFT-LCD. These were offered primarily as high-end items and were not aimed at the general market. This led to Japan launching an LCD industry, which developed larger-size LCDs, including TFT computer monitors and LCD televisions. Epson developed the 3LCD projection technology in the 1980s, and licensed it for use in projectors in 1988. Epson's VPJ-700, released in January 1989, was the world's first compact, full-color LCD projector. The first wall-mountable TV used LCD technology and was introduced by Sharp Corporation in 1992.

Market takeover

In 2006, LCD prices started to fall rapidly and their screen sizes increased, although plasma televisions maintained a slight edge in picture quality and a price advantage for sets at the critical 42" size and larger. By late 2006, several vendors were offering 42" LCDs, albeit at a premium price, encroaching upon plasma's only stronghold. More decisively, LCDs offered higher resolutions and true 1080p support, while plasmas were stuck at 720p, which made up for the price difference.

Predictions that prices for LCDs would rapidly drop through 2007 led to a "wait and see" attitude in the market, and sales of all large-screen televisions stagnated while customers watched to see if this would happen. This was in spite of plasmas continuing to hold an image quality advantage, but as the president of Chunghwa Picture Tubes noted after shutting down their plasma production line, "(g)lobally, so many companies, so many investments, so many people have been working in this area, on this product. So they can improve so quickly." This development drove competing large-screen systems from the market almost overnight. Plasma had overtaken rear-projection systems in 2005. The same was true for CRTs, which lasted only a few months longer; Sony shut down the final plant in March 2008. The February 2009 announcement that Pioneer Electronics was ending production of the plasma screens was widely considered the tipping point in that technology's history as well.

LCD's dominance in the television market accelerated rapidly.

In 2009, LCD TV shipments raised to 146 million units (69% of the total of 211 million TV shipments).

In 2010, LCD TV shipments reached 187.9 million units (from an estimated total of 247 million TV shipments).

Larger size displays continued to be released throughout the decade:

In October 2004, Sharp announced the successful manufacture of a 65" panel.
In March 2005, Samsung announced an 82" LCD panel.
In August 2006, LG.Philips LCD announced a 100" LCD television
In January 2007, Sharp displayed a 108" LCD panel under the AQUOS brand name at CES in Las Vegas.

Competing systems

In spite of LCD's dominance of the television field, other technologies continued to be developed to address its shortcomings. Whereas LCDs produce an image by selectively blocking a backlight, organic LED, microLED, field-emission display and surface-conduction electron-emitter display technologies all produce an illuminated image directly. In comparison to LCDs, all of these technologies offer better viewing angles, much higher brightness and contrast ratio (as much as 5,000,000:1), and better color saturation and accuracy. They also use less power, and in theory, they are less complex and less expensive to build.

Manufacturing these screens proved to be more difficult than originally thought, however. Sony abandoned their field-emission display project in March 2009, but continued to work on OLED sets. Canon continued development of its surface-conduction electron-emitter display technology, but announced it would not attempt to introduce sets to market for the foreseeable future.

Samsung announced that 14.1 and 31 inch OLED sets were "production ready" at the SID 2009 trade show in San Antonio.

LCD television

Market takeover

Competing systems

See also

References

External links