How to identify LED screen and LED backlight
Author:Sun Shuo Time:2021-06-09 08:01 Browse(809)
Now the LED TVs sold in stores are all backlight TVs. Only outdoor and stage TVs are real ones
Now the LED TVs sold in stores are all backlight TVs. Only outdoor and stage TVs are real ones
LED screenThe difference between them is more obvious; LED display: also known as electronic display or floating character screen.
it is composed of LED lattice.

How to identify LED screen and LED backlight

text, pictures, animations and videos are displayed by the red or green light. The content can be changed at any time, and all components are display devices with modular structure.
it is usually composed of display module, display module and display module The display [1] module is composed of a lattice composed of LED lights.
it is responsible for light-emitting display; The control system can make the screen display text, pictures, videos and other contents by controlling the lighting of the corresponding area; The power supply system is responsible for converting the input voltage and current into the voltage and current required by the display screen.
the LED display screen can display changing numbers, text, graphics and images; It can be used not only in indoor environment, but also in outdoor environment.
it has the incomparable advantages of projector, TV wall and LCD.
LED has been widely valued and developed rapidly.
it is inseparable from its own advantages.
these advantages include: high brightness, low working voltage, low power consumption, miniaturization, long service life, low power consumption and so on The development prospect of LED is very broad.
at present, it is developing towards higher brightness, higher weather resistance, higher luminous density, higher luminous uniformity, reliability and panchromatic.
the performance of LED display screen is superior: the luminous brightness is strong, when the sunlight is directly on the screen surface within the visible distance.
the display content is clear and visibleSuper gray control has 1024-4096 gray level control,The display color is more than 16.7M, the color is clear and realistic, and the three-dimensional sense is strong. The static scanning technology adopts the static latch scanning mode, high-power drive, fully ensuring the luminous brightness. The automatic brightness adjustment has the function of automatic brightness adjustment, which can obtain the best playback effect in different brightness environments. The full use of imported large-scale integrated circuits greatly improves the reliability, It is easy to debug and maintain. It can work all day and adapt to all kinds of outdoor harsh environment. It has strong anti-corrosion, waterproof, moisture-proof, lightning protection, anti-seismic overall performance, high cost performance, good display performance. The pixel tube can adopt P10 mm, p16 mm and other specifications. Advanced digital video processing technology, distributed scanning, modular design / constant current static drive, automatic brightness adjustment, Super bright pure color pixel image has clear picture, no jitter and ghosting, eliminate distortion video, animation, chart, text, picture and other information display, network display, remote controlLED backlight;The so-called led refers to light emitting diode, which is often referred to as light emitting diode. This kind of product and its application are not only available now, but also can be seen everywhere in our real life. For example, LED is used as light source in billboards on the roadside, indicator lights on household appliances and backlighting on mobile phone keyboards, We shouldn't feel fresh, so we don't need to explain this product and its working principle in detail here, but as far as its application in display products is concerned, it should also be regarded as an emerging technology product.
due to some inherent defects of CCFL (cold cathode fluorescent lamps) backlight technology and products on traditional LCD display devices,For example, narrow color gamut, low energy efficiency, high power consumption and short life, so people have been looking for alternative technologies and products, and in this process, LED backlight technology products have been included in the scope of people's choice.
LED light sourceAccording to the light-emitting principle,
LED is made of several thin layers of doped semiconductor materials, one layer contains excessive electrons, the other layer lacks electrons and forms positively charged "holes". When working, the current passes through, the electrons and holes combine with each other, and the excess energy is released in the form of light radiation. It is based on this principle that led realizes electro-optic conversion, According to the different physical properties of semiconductor materials, LED can emit different colors of light under different spectra from UV to IR, especially after the technical problem that led can not emit white light is solved, which lays a fundamental foundation for the application of LED in the field of display.
the main purpose of using LED as the backlight of LCD TV is to improve the image quality, especially the color saturation, The display screen with LED backlight technology can achieve a wide enough color gamut to make up for the deficiency of LCD display color quantity, so that it can meet or even exceed the requirements of adobe RGB and NTSC color standards, and can reach more than 100% of NTSC ratio. Sony launched the LCD TV panel with LED backlight, with special emphasis on the performance of bright red and dark green, It can display more realistic colors than before.
at the same time, because of the flat light source characteristics of LED,
the LED backlight can also realize the regional color and chroma adjustment function that CCFL can't match, so as to achieve more accurate color restoration to meet the needs of graphic Publishing and graphic design work. The dynamic adjustment of the picture can make it easy to display different pictures, Brightness and contrast can be dynamically corrected,In order to achieve better image quality.
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LED is betterThe intrinsic characteristics of LED determine that it is the most ideal light source to replace the traditional light source.
it has a wide range of applications.
LED has a wide range of applications1、 Small sizeLED is basically a very small chip, which is encapsulated in epoxy resin.
so it is very small and very light.
LED is a very small chip2、 Low power consumptionThe power consumption of LED is quite low.
generally speaking, the working voltage of LED is 2-3.6v.
the working current is 0.02-0.03a.
that is to say, the power consumption of LED is no more than 0.1W.
the working voltage of LED is 2-3.6v3、 Long service lifeUnder appropriate current and voltage, the service life of LED can reach 100000 hours4、 High brightness, low heatLed uses cold light-emitting technology.
the calorific value of LED is much lower than that of ordinary lighting lamps.
the energy consumption of LED is much lower than that of ordinary lighting lamps5、 Environmental protectionLED is made of non-toxic materials.
unlike fluorescent lamps, mercury can cause pollution, and LED can also be recycled.
LED is made of non-toxic materials6、 Strong and durableThe LED is completely encapsulated in epoxy resin.
it is stronger than the bulb and fluorescent tube.
there is no loose part in the lamp body.
these characteristics make the led not easy to be damaged.
LED is not easy to be damagedHigh energy saving: energy saving and pollution-free means environmental protection.
DC drive.
ultra low power consumption (single tube 0.03-0.06 Watt) electro-optic power conversion is close to 100%, and the same lighting effect can save more than 80% energy than traditional light source.
this paper introduces the design and implementation of a new type of lighting systemLong life: LED light source is called long life lamp.
it means the lamp that never goes out.
solid cold light source.
epoxy resin package,There is no loose part in the lamp body, and there are no defects such as filament burning, heat deposition, light decay, etc. the service life of the lamp can reach 60000 to 100000 hours, which is more than 10 times longer than that of the traditional light sourceChangeable Fantasy: LED light source can use the principle of red, green and blue three primary colors.
under the control of computer technology, three colors have 256 gray levels and can be mixed arbitrarily to produce 256 colors × two hundred and fifty-six × 256=16777216 colors, forming a variety of combinations of different light colors, realizing rich and colorful dynamic change effects and various images.
in this way, we can create a variety of imagesEnvironmental protection: the environmental protection benefit is better.
there is no ultraviolet and infrared in the spectrum, neither heat nor radiation, the glare is small, and the waste can be recycled, no pollution, no mercury element, cold light source, and can be safely touched, so it belongs to the typical green lighting light source.
there is no pollution in the spectrumHigh Tech Tip: compared with the monotonous luminous effect of traditional light source.
LED light source is a low-voltage microelectronic product, which successfully integrates computer technology, network communication technology, image processing technology, embedded control technology, etc., so it is also a digital information product. It is a "high tech tip" technology of semiconductor optoelectronic devices, which has the characteristics of online programming, unlimited upgrade, and flexibility.
LED light source is a low-voltage microelectronic productThe LCD with 1 LDE backlight is thinner than that with CCFL backlightThe electro-optic conversion rate of 2 LDE backlight LCD is about 99% higher than that of CCFL backlight.
the electro-optic conversion rate of CCFL backlight LCD is 90%.
the brightness of 3 LDE backlight LCD is higher than that of CCFL backlight LCD.
the LCD with LDE backlight can be seen in the sun.
the brightness of traditional CCFL backlight LCD is lower.
it is unable to view the screen in the sun.
the LCD with 2 LDE backlight can be seen in the sunThe color gamut of 4 LDE backlight is 118%.
the color gamut of CCFL backlight is 78%.
the color gamut of 4 LDE backlight is 118%.
the color gamut of CCFL backlight is 78%In general, you can't tell whether it's CCFL backlight or LED backlight.
but if you put it in the sunlight, you can see that the LCD brightness of LED backlight is relatively high.
it depends on whether the business is willing to let you take your notebook to the sunlight outside the Mall for inspection.
in addition, some manufacturers are now trying to save costs, Even the LDE backlight is as thick as the CCFL backlight LCD.
the appearance can't be seen.
if it's a new product.
if it's a new grinding tool, the thickness of the screen should be 5 to 6 mm, which is thinner than 8 to 9 mm of the CCFL backlight LCD.
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if it's a new grinding tool
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