60 Lcd Televisions
60 Lcd televisions
LCD TV - the Latest in Viewing
Liquid Crystal Display is all about flat panel television technology. The technology of liquid crystal display has penetrated our everyday life in everyday things like wristwatches, mobile phones, calculators, computer monitors and high definition television. The use is growing rapidly and sales of LCD TV are expected to exceed 4 million in America alone.
There are some distinct advantages of LCD panels over other kinds of display technologies. They are slimmer and hardly go beyond 3.5`` in depth. These are lighter also and best of all they draw less power - only about 60% of the power consumed by plasma displays. LCD televisions do not spew electromagnetic waves that are harmful.
There are drawbacks of course - viewing angle is restricted, contrast ratio is limited and time of display response may cause concern. The biggest frown of all is caused by the price. Although it is falling but still it is considerably higher than its plasma counterpart.
LCD displays comprises mainly of sheets of polarized glass sheets - two in number. A liquid crystal solution is sandwiched between these. These liquid crystals are very specific that causes them to act as shutters that open or shut out entry of light as the need arises depending upon flow of electric current. This current passing through the liquid crystals is regulated by voltage that is applied between the glass sheets through the electrodes that are transparent. These form a network having rows on one direction of the panel and columns on the other side representing the pixels or picture elements.
What are these liquid crystals? Matter can be found in three states - solid, liquid and gas. Nevertheless there are substances that exist in a state that is neither liquid nor solid at any one point of time. The behaviour of these molecules is also peculiar. They keep to their orientation like those in a solid and yet they shuffle around taking up various positions like the molecules of a liquid. Thus these liquid crystals can be termed neither solid nor liquid though they have more of an affinity for the latter - that is the liquid state.
There are various types of liquid crystals with each having its distinct properties. Those used in LCD panels are termed nematic-phase liquid crystals. The molecules are arranged in a particular fashion having distinctive pattern.
LCD display systems are of two types - passive and active matrix. The former is more complicated, produces the best pictures and consequently the price also goes up. During the manufacturing stage bad-pixels pose a serious problem. Innumerable controlling transistors are required on the glass substrata to control each sub-pixel. A typical wide screen panel will require 3.1 million transistors. Any one faulty transistor cannot be replaced and are known as dead or stuck pixels. If one is permanently off then a black spot will show and if it is on then a white spot will show. If it crosses a certain number the whole unit will have to be discarded.
It was during the early 2000`s that LCD flat panels took over the television market from the typical CRT`s. The basis of the technology is founded on the characteristics of polarized light. The thin semi liquid crystal gel trapped between two slim polarized sheets is divided into pixels.
There is hectic activity to overcome the technological difficulties to make the set affordable. So the LCD TV has to be made affordable to hit the headlines of success.
This article is under GNU FDL license and can be distributed without any previous authorization from the author. However the author's name and all the URLs (links) mentioned in the article and biography must be kept.
About the Author
This article can also be accessed in portuguese language from the Article section of page www.polomercantil.com.br/tv-lcd.php
Roberto Sedycias works as IT consultant for www.PoloMercantil.com.br
Does it hurt the TV to NOT "stretch" the screen and allow the gray filler to stay on screen?
We own a 60" LCD projection television, and my roommate insists that the gray side filler will permanently burn into the screen if we watch it un-stretched all the time. In HD, it's fine, but normal stations he always wants it stretched out. Is there documented proof so that I can show it to him?
If you watch 4:3 programming all the time, then yes, there can be a burn-in problem.
Currently, no technology is burn-in proof. LCD, plasma and DLP all have this potential issue. Plasma is must vunerable and DLP is least likely. LCD is in-between.
I don't have any documented proof. I have industry experience, who use to write repair manuals for LCD and DLP technology. I understand how the technology actually works, compared to other people who just believe everything they read or hear on a blog.
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60 Lcd Televisions
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 Axion AXN 8701 7 Inch Widescreen Handheld LCD TV with Built In Tuner $35.00 Time Remaining: 35m |
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Toshiba 40E220U 40-Inch 1080p 60Hz LCD HDTV List Price: Sale Price: $395.00  |
Descriptiontoshiba 40" 1080p/60hz lcdtoshiba 40" 1080p/60hz lcd |
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Toshiba 32C120U 32-Inch 720p 60Hz LCD HDTV List Price: Sale Price: $269.99 |
DescriptionToshiba 32-Inch 720p 60hz LCD HDTV |
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LG 32CS460 32-Inch 720p 60 Hz LCD HDTV List Price: Sale Price: Too low to display |
DescriptionCS460 LCD HDTV Looking for an HDTV with great picture quality for an additional room or the bedroom? You've found it with CS460 HDTV. KEY TECHNOLOGIES Find the perfect picture Get easy self-calibration with on-screen reference points for key picture quality elements such as black level, color, tint, sharpness and backlight levels... |
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LG 42CS560 42-Inch 1080p 60 Hz LCD HDTV List Price: Sale Price: Too low to display |
DescriptionCS560 LCD HDTV Looking for an HDTV with great picture quality at an affordable price? You've found it with CS560 LCD HDTV. KEY TECHNOLOGIES Double the detail This stunning picture is the reason you wanted HDTV in the first place... |
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Apex LE1912 19-Inches 720p High Definition LCD Television with Edge LED Backlight - Black List Price: Sale Price: $109.98 |
Description19" 720p LED-LCD HDTV Black |
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Samsung LN32D403 32-Inch 720p 60Hz LCD HDTV (Black) [2011 MODEL] List Price: Sale Price: Too low to display |
DescriptionFebruary 2011 Watch movies; check out videos, view pictures, and more on a 32-inch LCD HDTV. It's ready for an HDMI or Component source. Or take a look at your favorite music or picture files from a USB thumb drive... |
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Coby TFTV4025 40-Inch 1080p LCD TV - Black List Price: Sale Price: $329.99 |
DescriptionCoby’s 40 Inch 1080p LCD HDTV offers a premium viewing experience, featuring a big, brilliant picture with room-filling stereo sound is the first thing that you'll notice about the Coby TFTV4025 40 Inch Widescreen LCD HDTV... |
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LG 32LK330 32-Inch 720p 60 Hz LCD HDTV List Price: Sale Price: $339.95 |
DescriptionMove into the entertainment experience you've been waiting for with the 32LK330 LCD HDTV. Everything looks crisper, more vibrant, and more colorful on an HDTV. It's about time your entertainment stepped up to meet your expectations... |
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Haier L32B1120 32-Inch 720p LCD TV -Black Sale Price: $473.10 |
Description32" 720p LCD HDTV. 1366 x 768 native resolution, 3000:1 contrast ratio, 60Hz refresh rate. Connections: 2-HDMI, component, composite, PC, USB, and RG6. 450 cd/m2 brightness. 400 x 200 VESA compatible. Receives ATSC, NTSC and QAM video signals... |
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Coby TF-TV3227 32-Inches 720p LCD High-Definition Television - Black List Price: Sale Price: $232.99 |
DescriptionWith Coby's TF-TV3227 32 In. Class 720p LCD HDTV the first thing you will notice is a big, brilliant picture with room-filling stereo sound. But take a closer look, and you will find that this set is packed with features that make it an ideal hub of a home entertainment system... |
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