What is the difference between LCD TV and plasma TV?
Author:Colorful letters Time:2021-07-20 14:41 Browse(784)
Plasma TV is better!
Plasma TV is better plasma tube is used as light-emitting device, each pixel corresponds to a plasma tube, and the plasma tubes emitting light in the screen are evenly distributed.

What is the difference between LCD TV and plasma TV?

in this way, the center and edge of the display image are completely consistent.
there will be no distortion, Plasma is a kind of self luminous display technology.
no background light is needed, so there is no problem of viewing angle and brightness uniformity of LCD, Moreover, it achieves high brightness and contrast.
and the design of three primary colors sharing the same plasma tube also avoids the focusing and convergence problems.
it can achieve very clear images.
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the liquid crystal display in liquid crystal TV is a kind of transmission display technology.
the transistor electrode made of thin film technology, The scanning method is used to actively control the on and off of display points, so as to control the arrangement state of liquid crystal molecules, and then change the shading and light transmission state to display images.
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liquid crystal display itself does not emit light.
backlight is needed, so the brightness depends on the light transmission efficiency of backlight and liquid crystal itself, so it is more difficult for liquid crystal TV to achieve high brightness and contrast than plasma TV, There are also response time and viewing angle problems, but the recent progress of LCD technology is quite amazing.
at present, there is not much difference between LCD and plasma in brightness and viewing angle.
most LCD TVs on the market have response time of 13-16ms, and there are many products with 12ms and 8ms, which can completely solve the residual shadow and tailing phenomenon in the process of dynamic video display.
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1 The working principle of LCD TV: the most important material in LCD is LCD.
the working principle of LCD TV is LCDWhen the power is on, the molecules are arranged in an orderly way, making it easy for light to pass through; 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.
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 meet the requirements of future HDTV.
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2. The body is light and thin.
the thickness is less than 4cm,Only 1 / 2-1 / 3 of the thickness of plasma TV is about 1 / 10 of the thickness of ordinary CRT TV.
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3. The appearance is fashionable and beautiful.
it is very consistent with the aesthetic taste of contemporary people, and is especially sought after by the younger generation.
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4. It has a long service life.
it generally reaches more than 50000 hours, and can be used for 17 years based on 8 hours a day, which is longer than the service life of ordinary CRT TV.
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5 Environmental protection and energy saving.
LCD TV adopts progressive scanning and dot matrix imaging, with no flicker and no harm to human eyes.
the power of 21 inch LCD TV is 40 watts.
the power of 30 inch LCD TV is 120 watts, which is less than that of 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.
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(5) it has good anti electromagnetic interference function.
it can be used to connect almost all the signal sources in the market
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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 now).
advantages are as follows:
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· PDP display is smaller in size, 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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is insufficient.
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it can be seen from the above discussion.
plasma has many advantages and is light, 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 significantly.
from the perspective of supporting manufacturers.
foreign manufacturers, such as LG, Samsung and Hyundai in South Korea, and Mingji, Hyundai in Taiwan Province in China In China, TCL, Skyworth and Hisense have all launched their own products.
personally,
as the future home TV theater, PDP is the first choice, of course, the premise is to expect the price to drop quickly
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