This question bothers all who are tempted by advertisements or incredibly attractive picture of a new generation of TVs.And yet, what to choose - LCD or "plasma"?Surely among your friends are supporters of models made by different technologies.In addition, each will compliment your own TV.Therefore, it is wise to not just rely on someone else's opinion, but before you go to the store or to seek advice from friends, spend some time and clearly understand the differences between these technologies from each other, and which one is right for you.
Basic principles of design conventional CRT TVs all know who remember high school physics.The electrons inside the cathode-ray tube knock photons from the phosphor (a substance capable of luminescence).In this way, each point on the screen is colored in a color obtained by mixing red, blue and green.The entire picture is drawn in lines, line - one pixel (pixel - a point on the screen, the minimum pixel).From points in the end and get the final image.The process i
All this creates certain problems.Firstly, the image flickers, which can not but have a negative effect on vision.Secondly, the electromagnetic radiation is also adversely affect health.Third, the CRT TV "thanks" to this very handset takes a lot of space.A fourth, and on - the usual plasma TVs are inferior in many technical characteristics: brightness, contrast, viewing angle.
But it is worth noting that such old-fashioned devices are very inexpensive and last longer than their newfangled competitors, serve us for decades, so the choice often falls on them.
Regarding the characteristics of liquid crystal display (LCD) TVs, then, without going into the jungle of physics, there are two panels, between which is a layer of so-called liquid crystals.Depending on the voltage of the electric field, which is a particular pixel, liquid crystals miss a certain part of the light flux.One strain - point glows white, the other - the red, and the third - yellow.
LCD screens have a much more correct image geometry thanks to a perfectly flat surface.This surface is natural as opposed to CRT displays, flat surface where the image effect is due to the use of different technical contrivances.The LCD TVs sharper.However, as a rule, smaller LCDs angle.
It turns out that because of their features, LCD screens provide better image quality and less harmful to your health as compared to cathode ray tubes (not noticeable screen flicker, no harmful radiation).However, to use this TV for viewing movies with a group of friends is not always convenient - the image is clearly visible only in the case if you are sitting face to the screen and the side of the image will be hard to see.
The principle of operation of the plasma TV is quite different.Imagine two applications to each other glass.Between them there is a space filled with gas.There is also a grid of electrical wires.Passing through these wires, the current turns the gas into plasma, and causes fluorescent luminescence elements.Accordingly, the image generated hundreds of thousands of such elements colored in different colors.
Advantages of "plasma" are obvious: the viewer's health is almost not in danger, the picture does not flicker (because the image does not appear line by line, and immediately all), increases the brightness and contrast, viewing angle is about 160 degrees.Screen (as, incidentally, in the case of LCD option) takes up little space thanks to a thickness not exceeding 20 cm. The disadvantages of the plasma screens can deliver the highest power consumption.
Advantages of plasma TVs - is:
- large surface radiation
- a high level of contrast and color depth, richness of colors and good color saturation
- a genuine transfer movements.
Advantages of LCD TVs:
- low operating temperature eliminates burning
screen - angle vertically broader review than the "plasma»
- life (life span) - at least twice as much as the "plasma»
- at the end of the service life of when to replace the light source is sufficient (a lamp), rather than the
screen - the TV is small in power consumption, and the screen does not emit radiation.
Summarizing, we can list the advantages and disadvantages of both modern technologies.
Disadvantages of Plasma TVs:
- the screen may fade as a result of high operating temperature
- generated more heat
- visible pixelation (points), especially when you reject a vertical
angle - "plasma" is short-lived - at an averageload running 4-6 years.
Disadvantages of LCD TVs:
- basic color is so contrasting and intense that suppress halftones and tints
- problem loops (image retention or "ghost-frame") has not been eradicated, and complicates the quality
natural motion transmission - maximumpanel size - 46 inches.
As for the price, then there is a pattern: cheaper plasma, and among the relatively small among the large screens - LCD.That is, the plasma large (with a diagonal of 42 and 50 inches) are cheaper per unit area.So if you need a really big screen, providing a perfect picture, "plasma" - your choice.
The price range for the plasma TV is big enough, but the price in recent years, both plasma and LCD TVs have been declining, so at a certain patience you will be able to choose the perfect TV for little money.The choice is yours!