What's the difference between LED screen and LCD?
Author:Great wealth Time:2021-06-07 08:03 Browse(996)
LED backlight liquid crystal only changes the backlight system from fluorescence to LED on the basis of traditional liquid crystal, but it has made great progress in both display effect and service life. More importantly, after nearly a year of development, the price of this kind of display has dropped from several thousand yuan to about 2000 yuan, which is in the same price range as traditional liquid crystal.
LED backlight liquid crystal only changes the backlight system from fluorescence to LED on the basis of traditional liquid crystal, but it has made great progress in terms of display effect and service life. More importantly, after nearly a year of development, the price of this kind of display has dropped from several thousand yuan at the beginning to about 2000 yuan at present, which is in the same price range as traditional liquid crystalWhen consumers are faced with so many choices.
Where should they go? How good is the display effect of LED liquid crystal? Is it worth paying for? As a new technology, what are the performance advantages of LED backlight? Can the ultra long life and low power consumption of LED liquid crystal offset the price difference between LED liquid crystal and traditional liquid crystal? In order to answer these questions, we have collected several representative led liquid crystal products, and hope that through their testing and analysis, consumers can choose more suitable products in the misty liquid crystal market.
we hope that we can help consumers to choose the products that are more suitable for themAt present, the low price LED display on the market is designed with white backlightLED backlight is a relatively new technology.

What's the difference between LED screen and LCD?

at present, major manufacturers have applied it to high-end products, such as the xl20 / xl24 / XL30 products launched by Samsung, which are located in the professional market and expensive.
however, such products use RGB three color LED backlight.
that is, each LED light source can emit red, green and blue at the same time, Therefore, its color expressiveness can reach a very high levelOf course, not all manufacturers have positioned LED backlight liquid crystal so high.
for example, the vled221wm of upai is also LED backlight, but the price is much more gentle, which is 3999 yuan.
while the v19 / V22 price of AOC is 1699 yuan and 1999 yuan respectively.
the price of LED backlight liquid crystal is higher than that of LED backlight liquid crystalAlthough the price of this kind of product is low,
but it uses another kind of backlight: white LED, that is, the LED in the backlight only emits white light.
so what are the advantages of this kind of product.
now we will give you a detailed answer about whether it has the purchase value at this stage.
we will give you a detailed answerFrom fluorescent tube to LEDIn the past, the backlight used by LCD is called CCFL.
it can be simply understood as a very small fluorescent tube.
and LED is a kind of light-emitting diode.
in our daily life, we see more LED flashlight, which has the advantages of high brightness, long life, small size and so on.
LED LCD only changes the backlight from the traditional CCFL to LED.
there is no change in the panel type.
there is no change in the panel typeFive advantages of LED white backlightMore colorfulMore uniform brightnessShadowing and dynamic contrastMore power savingLighter and thinnerThe color range of LED is as high as 100% ~ 130%At present, the color of LCD is still unsatisfactory. In the eyes of many users, the color of LCD still can't compare with that of CRT in the peak period.
however, when the panel manufacturing technology can't make a big breakthrough at the present stage.
only through the improvement of backlight technology can the color of LCD be improved.
the color of LCD be improvedLED display color gamut range up to 100% ~ 130%At present, the mainstream CCFL (cold cathode backlight) can't be decomposed into more color light due to its own spectrum limitation, and the gamut range is only about 70% of NTSC.
the color spectrum of CCFL (cold cathode backlight) can't be decomposed into more color lightHowever, using LED as the backlight is different.
the light emitted by LED covers a wider chromatographic range, and its color gamut range can reach 100% - 130%, without 30% color loss like the traditional CCFL backlight.
the color gamut of LED can reach 100% - 130%Therefore, the color of LED backlight display should be fuller.
and the details of the picture should be clearer, and the color transition should be more natural.
for users.
this also means that better picture quality can be obtained when playing games or watching high-definition movies.
in this paper, the color transition of LED backlight display is discussedNow let's compare the aocv22 with the ordinary 22 inch wide screen.
let's see if the LED liquid crystal is as good as the traditional liquid crystalContrast test: LED LCD display effect is more naturalLed liquid crystal has incomparable advantages in color purity and transition naturalness.
take a picture of a fallen leaf as an example.
on the ordinary liquid crystal display, the color on the leaf is very messy, and on the middle leaf, there is a very obvious dividing line between red and green.
on the LED backlight liquid crystal, although the middle leaf has many colors, such as green, red, purple, orange, etc, However, the transition between colors is extremely soft.
the most amazing thing is that on the CCFL liquid crystal, a leaf is displayed in green, while on the LED backlight display, we can see that the leaf is actually light yellow, and obviously the appearance on the LED liquid crystal should be more natural.
this is very important for users who like to watch blockbusters.
this is the first time that the color of the leaf is displayed on the LED backlight displayTip: what is NTSC gamutNTSC gamut: the sum of colors in NTSC standardNTSC is a set of protocols about TV broadcasting transmission and acceptance formulated by the National Television Standards Committee of the United States.
the color bit depth is set at 24 bits (about 16.7 million different colors). The standard has exceeded the number of colors that can be distinguished by human eyes (12 million-14 million), so it is also called true color.
NTSC is a set of protocols about TV broadcasting transmission and acceptanceSummary: LED has perfect color performance.
transition is more naturalIn the past, CCFL backlight liquid crystal has been cheating our eyes.
LED liquid crystal has extremely strong color transition ability.
and thanks to this, the details in the picture are more clearly presented in front of our eyes.
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if it is not related to TV.
LED means light emitting diode, LCD is a kind of solid-state semiconductor device that can convert electric energy into visible light, and it can directly convert electricity into light.
LCD refers to liquid crystal display.
is the abbreviation of liquid crystal display. The structure of LCD is to place liquid crystal in two pieces of parallel glass, and there are many vertical and horizontal small wires between the two pieces of glass, The direction of the rod-shaped crystal molecules can be controlled by power on or not, and the light can be refracted to produce a picture.
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