What is the difference between PDP (LCD) and LED (LED) TV
Author:Li Dongyu Time:2021-07-19 16:49 Browse(97)
LCD is liquid crystal display
LCD is the full name of liquid crystal display, mainly including TFT, ufb, TFD, STN and other types of LCD, which can not locate the program input point on the dynamic link library.

What is the difference between PDP (LCD) and LED (LED) TV

the structure of LCD is to place a liquid crystal cell between two parallel glass substrates.
TFT (thin film transistor) is set on the lower glass substrate, and color filter is set on the upper glass substrate, The rotation direction of liquid crystal molecules is controlled by the change of signal and voltage on TFT, According to the different backlight sources,
LCD can be divided into CCFL and led.
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CCFL.
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refers to the liquid crystal display (LCD) with CCFL as backlight.
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the advantage of CCFL is good color performance.
the disadvantage is high power consumption.
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LED.
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>It refers to liquid crystal display (LCD) with LED as backlight.
generally speaking, it refers to WLED.
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the advantages of LED are small size and low power consumption.
therefore, LED is used as backlight, It can achieve high brightness while being light.
the main disadvantage is that the color performance is worse than CCFL.
therefore, most professional drawing LCDs still use the traditional CCFL as the backlight.
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many users think that LCD can be divided into LED and LCD.
this understanding is misled by advertisements to some extent.
in this paper, the design of LCD is introduced
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the LED display in the market is not the real LED display.
to be exact, it is the LED backlight LCD, and the LCD is still the traditional LCD.
in a sense, it is more or less fraudulent! Samsung of South Korea was once judged by the British advertising association to have violated the country's advertising law, because its "ledtv" liquid is suspected to mislead consumers.
for LCD, the most important key is its LCD panel and backlight type, and the LCD panel of the market generally adopts TFT panel, which is the same, The only difference between LED and LCD is that they have different backlight types: LED backlight and CCFL backlight (i.e. fluorescent lamp).
they are diode and cold cathode lamp respectively.
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plasma and liquid crystal are the mainstream technologies of contemporary TV.
they represent two different development directions.
both flat-panel TVs have their own advantages and disadvantages.
plasma color TV has the advantages of no flicker image, no flicker image, no flicker image, no flicker image, no flicker image, no flicker image LCD TV has the characteristics of thin thickness, light weight, bright color and realistic image, and it is relatively easy to enlarge the screen. Its disadvantages are high power consumption, limited life and easy aging.
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LCD TV also has the characteristics of no flicker, thin thickness and light weight.
and LCD screen has been widely used in the field of PC, but in the aspect of large screen, LCD technology lags behind plasma, The cost of large screen color TV is high, and viewing is easily affected by viewing angle.
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the size / price ratio.
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LCD and plasma TV are not cheap.
relatively speaking, the unit price of plasma TV is superior to LCD TV in per square inch.
the price of plasma TV is lower than that of LCD TVThe size of LCD TV is small.
generally, it is about 30 inches and the price is between 4000 and 8000; The plasma size is large, and the smallest one is 42 inches. The price of domestic brands ranges from 15000 to 20000 yuan.
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performance.
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in terms of home theater effect.
the effect of plasma TV is better than that of LCD TV.
experts explain that.
because LCD TV usually can't display the blackness of plasma TV.
therefore,
LCD TV is difficult to display more details, Video players will also feel that the "three-dimensional" sense of the image is not very good.
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Life / power consumption.
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LCD TV has obvious advantages over plasma TV in terms of service life.
although the life of plasma TV varies.
it takes about 20000 hours to reduce the brightness to half, The power consumption of LCD is only 1 / 3 of that of plasma TV.
the power consumption of some plasma products is as high as 400W / h.
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Screen burning and altitude problems.
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Screen burning is the problem of plasma TV.
If a still image is kept on the screen for a long time, If the TV station logo or news scroll bar is displayed above and below the TV for a long time.
or if you often watch standard format TV programs on the wide screen, shadow will appear on the side of the image on the top, bottom or both sides of the screen.
therefore, it is better to pay attention in use.
for example, do not play still images on the screen for a long time, And setting the contrast below 50%
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in addition.
plasma TV may have problems at high altitudes, because the pressure difference at different altitudes will make plasma TV emit an unpleasant hum, of course, In Nanjing, there will be no high altitude problem.
while LCD TV will not have the above two problems.
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high definition.
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most plasma TV and LCD TV can display high-definition signals.
however, it should be noted that to enjoy a truly complete HDTV.
the display resolution should be at least 1280 × 720.
only a few 42 inch plasma TVs can achieve this resolution.
most 50 inch plasma TVs and almost all LCD TVs larger than 26 inches have no problem.
of course.
a TV smaller than 42 inch is better than a real HDTV unless you sit in front of the screen and watch it carefully, Generally, we don't notice much difference between the two.
for example,
although Panasonic's th-42pa20u 42 inch plasma TV only provides enhanced definition resolution (EDTV, 852 × However, the HDTV reception effect is still very good.
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computers and video games.
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most plasma TVs and LCD TVs can be used as computer monitors.
many TVs even provide DVI interfaces, However, considering the possibility of screen burning in plasma TV, LCD TV is a relatively safe choice.
in this paper, the design of LCD TV is introduced.
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