An Introduction To LCD

May 22nd, 2008

The United Kingdom’s Radar Research Establishment (RRE) started work on liquid crystals in the late 1960’s. At the University of Hull, George Gray and others were working on the same lines. It was with RRE’s support that cyanobiphenyl liquid crystals (stable and have the right temperature properties for use in LCDs) were later discovered by Gray.

The United Kingdom’s Radar Research Establishment (RRE) started work on liquid crystals in the late 1960’s. At the LCD or liquid crystal display is a flat and thin display device constructed of monochrome or color pixels that are kept in front of a reflector. Engineers highly value this technology because of the minimal electric power it consumes. In fact, it is just about perfect for use in mechanisms that are powered by battery.

LCDs are found in many digital watches and portable computers. LCD displays have two areas of polarizing substance, and a liquid crystal solution in between. With the passing of electric current through the liquid, the crystals line up in such a way that light cannot infiltrate them. Each crystal acts like a shutter, either blocking the light or allowing it to come through.

Monochrome LCD images generally show as dark gray or blue images atop a grayish-white backdrop. In color LCDs, two fundamental techniques are used for producing color: Passive matrix is the less costly of the two. Limited in color and viewing angle, passive matrix was broadly used with earlier laptops for mono or color displays. The second technology is called active-matrix or thin film transistor (TFT). It puts out color images that are sharp, but its technology is costly. Active-matrix is used for laptops, desk-top computers, home theatres, etc. Recently, passive-matrix displays have been come up with technology that can produce colors sharp enough to rival active-matrix displays.

When purchasing an LCD monitor, it is important to thoroughly check the entire package, which includes resolution, response time, viewable size, viewing angle, brightness and contrast ratio, color support, etc.

LCD provides detailed information on LCD, LCD Projectors, LCD Monitors, LCD Tvs and more. LCD is affiliated with LED Displays.

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LCD TV Reviews

May 16th, 2008

The popularity of LCD televisions is growing in the market with each passing day. There are a plethora of LCD televisions to choose from. Here are five LCD televisions that cater to all types of consumers, from the lay individual to the high-definition purist. Sharp Aquos LC-45GD4U, a 45-inch LCD HDTV, is one of the select few televisions with a 1920 x 1080 resolution. In other words, this is a television aficionado’s delight, in that it displays the minutest detail of high-definition television. For the lay viewer, however, the difference can be minimal. Sharp Aquos LC-45GD4U is perhaps the cheapest HDTV on the market. It is priced around $4700. It is generally agreed that Sharp manufactures the best LCD televisions. Sharp Aquos LC-37GD4U, a 37-inch LCD HDTV is more or less similar to the Sharp Aquos LC-45GD4U, but possesses a slightly lower resolution. Sharp Aquos LC-37GD4U has detachable speakers and light sensors capable of adjusting brightness based on lighting conditions. These two Sharp products are among the very best LCD televisions in the market. Sharp Aquos LC-37GD4U is priced around $3000.

Sharp Aquos LC-32G4U is less expensive than its bigger cousins, but it is generally considered a good buy. However, experts believe that the “black levels” and the quality of image are inferior to that of the other two Sharp products. This 1366 x 768 resolution television comes with an inbuilt analog tuner. Priced at $1800, Sharp Aquos LC-32G4U is a user-friendly model.

Syntax Olevia LT30HV is normally considered pedestrian by other LCD televisions standards. However, it seems to be a great budget pick. With a 1280 x 720 resolution, this television has a bright screen with good color. In comparison to the Sharp Aquos televisions, it has mediocre “black levels.” However, it is distinctly better than other LCD televisions of the same price. Syntax Olevia LT30HV comes for about $1000 in the market.

Sony MFM-HT75W, Widescreen LCD monitor with TV tuner, comes with a 17″ screen and a 1280 x 768 resolution. It is one of the best products when it comes to the quality of image and color fidelity. It is the ideal choice for photography and graphics. The images look sharp and crisp, though experts opine that it has the propensity to throw back ambient light. It may not be the best suited for a bright place. Sony MFM-HT75W has an analog tuner, so it is possible to watch television with a cable input. Also, it works perfectly well with Macintosh computers. It is priced in the market at about $570.

LCD provides detailed information on LCD, LCD Projectors, LCD Monitors, LCD Tvs and more. LCD is affiliated with LED Displays.

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LCD TVs

May 13th, 2008

Liquid crystal display television or LCD TV uses LCD TFT technology, more often than not, for visual output as opposed to the conventional cathode ray (of the original TV) or plasma technology.

LCD television initially faced problems entering the market, particularly when it came to viewing fast paced action. Also, the viewing angle was rather limited. However, with the advancement in technology, these problems have more or less been wiped out. Today LCD television commands a burgeoning market, especially in the Asian region.

For quite a long time, the general consensus was that the technology used for LCD television was appropriate for small televisions only, and would invariably fall short of plasma technology when it came to bigger televisions. However giant corporations like Samsung, Sharp Corporation and LG Philips have challenged this notion by coming up with LCD televisions with distinctly large panels. 40″ to 45″ televisions were widely in the market a year ago. Sharp Corporation has successfully produced a 65″ panel LCD television. In 2004, Samsung and Sony joined hands to build a factory, with the intention of manufacturing 60,000 panels every month. In 2005, Samsung proclaimed the successful completion of an 82″ HDTV TFT panel. It is believed that the LCD market is potentially worth billions of dollars, and television is seen as the main market.

TVs based on S-PVA LCD panels produce good viewing angles. They also give sufficient
“contrast ratio” for viewing scenes that are bright, as well as dark scenes in bright conditions. Also “dynamic contrast” technology improves contrast when one is viewing dark scenes in dark conditions. Also, there are LCD televisions that throw light on the background to help make dark scenes look darker.

Today, LCD televisions are offering greater viewing angles and better quality images. LCD televisions can also be deemed direct competition to the fashionable plasma televisions. However, LCDs are distinctly lighter and comparatively more durable.

LCD technology is “non-emissive”, in that it does not give off radiation like conventional televisions. Furthermore, their operation requires less power than plasma or CRT technology.

LCD provides detailed information on LCD, LCD Projectors, LCD Monitors, LCD Tvs and more. LCD is affiliated with LED Displays.

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