Lcd Tv The Latest In Viewing

Lcd Tv The Latest In Viewing



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.




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