What Is An Lcd Tv

What Is An Lcd Tv



What is​ an​ LCD TV?
In an​ LCD TV or​ transmissive display, a​ light source shines through a​ panel of​ liquid crystals in​ order to​ display an​ image .​
a​ white diffusion panel behind the​ LCD redirects and​ scatters the​ light evenly to​ provide a​ more uniform image than most competing technologies .​

The LCD face consists of​ two transparent layers which polarize a​ liquid crystal layer sandwiched in​ between .​
the​ front layer of​ glass is​ etched with a​ grid pattern on the​ inside surface to​ form a​ template for​ the​ liquid crystals .​
Liquid crystals are rod shaped molecules that bend light in​ response to​ an​ electric current; the​ crystals align so that no light can pass through .​
Each crystal acts like a​ camera's shutter, either blocking light or​ allowing it​ to​ pass through .​
a​ pattern of​ transparent or​ dark crystals forms the​ image .​
This same technology has been around for​ awhile, even in​ such unsophisticated items as​ digital watches.
LCD TVs use an​ active matrix LCD; the​ most advanced type of​ LCD .​
the​ active matrix design is​ based on TFT, or​ thin film transistors .​
These are tiny switching transistors and​ capacitors that are arranged in​ a​ matrix on a​ glass substrate, they switch the​ LCD pixels on and​ off .​
In a​ color TV's LCD, each color pixel is​ created by three sub-pixels with red, green, and​ blue color filters.
One of​ the​ biggest challenges for​ LCD TV manufacturers has been speeding up the​ pixel response time, (how fast an​ individual pixel's color can change without blurring) so that fast moving images don't exhibit motion lag or​ ghosting .​
This is​ especially critical for​ larger-screen LCD TVs, or​ for​ LCD TVs on which much of​ the​ viewing will be HDTV, or​ DVD movies .​

An important difference between LCD technology and​ Plasma is​ that an​ LCD screen doesn't have a​ coating of​ phosphor dots; LCD TVs color is​ created through the​ use of​ filters .​
This keeps image burn-in from being a​ problem--- which is​ good news in-particular for​ people who might use a​ video gaming system or​ PC on their TV .​
Another benefit of​ owning an​ LCD TV is​ the​ energy efficiency of​ this technology .​
LCD TVs typically consume 60% lees power than comparably sized tube-type, direct-view TVs.
In most ways that really matter there isn't much difference between LCD TVs and​ Plasma TVs .​
Both of​ these highly popular types of​ flat panel TVs are thin enough to​ be placed virtually anywhere, and​ both produce images that are startlingly clear, sharp, and​ bright .​
the​ most notable difference is​ screen size .​
the​ majority of​ LCD TVs have a​ screen size measuring 30 inches and​ smaller .​
Plasma TVs are, for​ the​ most part, uninhibited by measurement restrictions.
Basically, LCD and​ Plasma TVs are different approaches to​ the​ same result because the​ both create superior images using radically different technology.




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