What is the difference between LCD TV and plasma TV?
Author:sola Time:2021-07-21 14:36 Browse(410)
There are differences. 1. The working principle of liquid crystal TV: the most important material in liquid crystal display is liquid crystal. When it is powered on, the molecules are arranged in an orderly way, so that light can pass easily; When there is no electricity, the molecules are arranged disorderly, preventing light from passing through. Let the liquid crystal molecules as a gate to block or let light through. Because the liquid crystal material itself does not emit light, there are light tubes as light sources on both sides of the display screen. On the back of the liquid crystal display screen, there is a backlight plate (or even light plate) and a reflective film. The backlight plate is composed of fluorescent materials, which can emit light. Its main function is to provide a uniform background light source. The light from the backlight is passing through/
There are differences. 1. The working principle of liquid crystal TV: the most important material in liquid crystal display is liquid crystal. When it is powered on, the molecules are arranged in an orderly way, so that light can pass easily; When the power is off, the molecules are arranged disorderly to prevent light from passing through.
let the liquid crystal molecules block or let light pass through like a gate.

What is the difference between LCD TV and plasma TV?

because the liquid crystal material itself does not emit light.
so there are light tubes as light sources on both sides of the display screen. On the back of the liquid crystal display screen, there is a backlight plate (or uniform plate) and a reflective film. The backlight plate is composed of fluorescent substances, which can emit light, Its main function is to provide a uniform background light source.
after passing through the first layer of polarization filter layer, the light emitted by the backlight enters the liquid crystal layer containing thousands of liquid crystal droplets.
for liquid crystal display, the brightness is often related to its back light source.
the brighter the back light source is.
the brightness of the whole liquid crystal display will also be improved.
in the early liquid crystal display However,
because only two cold light sources are used, the brightness is often uneven, At the same time, the brightness is not satisfactory.
it was not until the introduction of four cold light source lamps.
there was no small improvement.
from the above-mentioned LCD principle, we can know that the quality of light source will directly affect the brightness and quality of the picture.
this is why the service life of notebook LCD is limited.
and it is relatively short, It is because it is greatly affected by the lamp.
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advantages:
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compared with the traditional color TV.
its advantages are mainly shown in the following aspects:
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first, the image definition is high.
generally speaking, it can reach 1024 × 758 pixels, fully meeting the requirements of future HDTV.
the
Second, the fuselage is light and thin.
the thickness is less than 4cm, only 1 / 2-1 / 3 of that of plasma TV, about 1 / 10 of that of ordinary CRT TV.
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Third, the appearance is fashionable and beautiful.
it is very consistent with the aesthetic taste of contemporary people, especially sought after by the younger generation.
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Fourth, it has a long service life.
it generally reaches more than 50000 hours, and can be used for 17 years according to 8 hours a day, Compared with ordinary CRT color TV, it has longer service life.
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v. environmental protection and energy saving.
LCD TV adopts progressive scanning and dot matrix imaging, with no flicker and no harm to human eyes.
21 inch LCD TV has 40 watts power.
30 inch LCD TV has 120 watts power, which is less than ordinary CRT color TV.
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2 The principle of plasma TV light-emitting: plasma display is a display device using gas discharge.
this kind of screen uses plasma tubes as light-emitting elements.
a large number of plasma tubes are arranged together to form a screen.
each chamber corresponding to each plasma is filled with neon and xenon gas.
after high pressure is applied between the plasma tube electrodes.
the plasma tube is sealed between two layers of glass The gas in the tube chamber generates ultraviolet light, which stimulates the red, green and blue phosphor on the flat panel display to emit visible light.
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(1) brightness and high contrast.
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(2) pure plane image without distortion.
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(3) ultra thin design Ultra wide viewing angle.
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(4) it has complete input interfaces.
it can connect almost all the signal sources in the market.
it can be used to connect all the signal sources in the market
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(5) it has good anti electromagnetic interference function.
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(6) environmental protection and no radiation.
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(7) good heat dissipation performance.
no noise.
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advantages:
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compared with the traditional picture tube display (that is, the ordinary analog TV used in our home).
the advantages are as follows:
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· PDP display is smaller in size, smaller in size, smaller in size, smaller in size and smaller in size It's lighter.
and has no X-ray radiation.
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· because the structure of each light-emitting unit of PDP is completely the same.
therefore, there is no geometric deformation of the image commonly seen in picture tubes.
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· the brightness of PDP screen is very uniform - there are no bright areas and dark areas; However, the brightness in the center of the screen of the traditional picture tube is always higher than the brightness around.
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· PDP is not affected by the magnetic field.
it has better adaptability to the environment.
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· there is no focusing problem in the PDP screen.
therefore.
the problem that some areas of the picture tube begin to defocus due to poor focusing or a long time has been solved, No color drift of the picture tube.
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· the flat surface can completely improve the distortion and color purity at the corners of the large screen.
high brightness, large viewing angle, full-color and high contrast.
it can make the PDP image clearer, more colorful and more ideal, The traditional TV is amazing.
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insufficient.
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can be seen from the abovePlasma has many advantages, light and thin, which means that it can meet the increasing "big" requirements of users. The brightness is uniform and very bright (this is the disadvantage of LCD TV), and it does not involve the focus problem.
however,
the biggest disadvantage is that it is too expensive.
however, it is related to technology.
with the progress of technology, The price will drop sharply.
from the perspective of supporting manufacturers.
foreign manufacturers, such as LG, Samsung and Hyundai of South Korea, Mingji and Zhonghua yingguan of Taiwan Province of China, plasmaco of the United States, Philips of the Netherlands and Thomson of France, have developed their own PDP products.
TCL, Skyworth, etc Hisense has launched its own products.
personally.
as for the future of home TV theater, PDP is the first choice. Of course, the premise is to expect the price to drop quickly they are like twins, although they are very similar on the surface, However, there are great differences in essence.
the biggest difference between the two is that they use different panels.
that is to say, their imaging principles are very different.
plasma TV relies on high voltage to activate the special gas in the imaging unit.
it produces ultraviolet light to stimulate phosphorescent materials to emit light.
while LCD TV changes the thin-film crystal on the LCD panel by current In addition, plasma TV and LCD TV also have their own characteristics. For example, plasma TV is cheaper than LCD TV in the same size, while LCD TV has advantages in power saving performance and display resolution,And claimed that the current plasma TV claims the highest physical resolution of less than 1024 × 1024, and almost all LCD TVs can reach 1024 × 768, the highest has reached 1920 × 1080.
in fact.
most plasma TVs on the market have a physical resolution of 852 × 480, only a few plasma TVs have a physical resolution of 1024 × 768.
but the definition of flat panel TV is not only determined by the physical resolution of the screen.
the circuit also directly affects the definition of high-definition signal processing, It's not enough to judge from the physical resolution of the screen.
so.
it's not scientific for LCD TV manufacturers to attack plasma TV from the physical resolution of the screen.
no matter how LCD TV defends itself.
plasma TV is better than LCD TV in terms of perspective, of course, plasma TV is not "no perspective problem." TV sets used in bedrooms.
few people will watch TV at an angle of more than 120 degrees, so from this angle, there is no need for both sides to attack the angle of view.
as for response speed, response speed used to be the weakness of LCD TV.
although there has been great progress in technology recently, However, they are sometimes attacked by the enterprises that produce plasma TVs.
some enterprises claim that their LCD TV response time has been reduced to 8 milliseconds, but in fact, Most of the LCD TVs on the market have a response time of about 12 Ms.
even the LCD TVs that have claimed that the response time has dropped to 8 ms.
there is still a tailing phenomenon when playing fast moving images, because the 8 ms response time claimed by enterprises is measured when playing still images.
for a fast moving black image or white image.
the response time of LCD TVs on the market is about 12 MsLCD TVs all have slight tailing, but that doesn't mean that plasma TVs are perfect in this respect. For fast-moving white objects, plasma TVs also have slight tailing, except that when fast-moving objects are changed to black, However, when the still image appears at the same position on the plasma screen for a long time, the burning phenomenon may occur.
when the plasma TV appears burning phenomenon.
when it is turned on or off, the image that has been played for a long time will appear vaguely on the screen, It seems to be printed on the screen, and this has become the target for some LCD TV manufacturers to attack plasma TV.
as for contrast, if we only look at the contrast figures marked on plasma TV and LCD TV by enterprises.
LCD TV is far inferior to plasma TV, But it can't be said that plasma TV is better than LCD TV.
this is because plasma TV and LCD TV adopt different contrast measurement methods.
even the measurement methods adopted by each enterprise are different. Of course, the data marked on their products will be very different.
plasma TV mostly adopts all white and all black measurement methods.
the contrast is generally very high, Some companies claim that the contrast ratio is as high as 8000:1, which is the reason.
if measured according to the American national standard ANSI,
the contrast ratio of plasma TV and LCD TV is mostly around 200:1 or 300:1, This calculation method is to compare the black and white of the same image.
about the attack of analog and digital plasma TV manufacturers on LCD TV display images, it is analog.
while plasma TV is all digital.
this calculation method is based on the comparison of black and white of the same imageHowever, in terms of image quality,
the analog image makes people feel smooth, while the digital image makes people feel jumping.
each has its own length, and the sales volume and sales volume are more than 40 inches.
plasma TV has obvious advantages. Although sharp has produced a 45 inch LCD TV and started to go on the market, it is not limited by the large-scale production of advanced LCD panel, LCD TV can not be compared with plasma TV in large size.
in the market of less than 30 inches.
LCD TV also occupies an absolute advantage compared with plasma TV. However, at present, there is no plasma TV less than 40 inches in Chinese market.
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LCD TV can not be compared with plasma TV in large size
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