Advantages & Disadvantages of LED Displayer

1. What is LED displayer?

LED displayer (LED displayer) is a kind of flat panel displayer, which is composed of small LED module panels, and is used to displayer various information such as text, images, and videos.

LED electronic displayer integrates microelectronics technology, computer technology and information processing. It has the advantages of bright colors, wide dynamic range, high brightness, long life, stable and reliable operation.

LED displayers are widely used in commercial media, cultural performance markets, stadiums, information dissemination, news releases, securities trading, etc., which can meet the needs of different environments.

(1) Working principle

LED displayer is a new type of information displayer medium, which is a flat displayer screen composed of light-emitting diode dot matrix modules or pixel units.

Each pixel of the single-color LED displayer consists of 1 single-color LED light-emitting diode, that is, each pixel contains 1 LED light-emitting diode.

Each pixel of the dual-primary color LED displayer consists of 2 single-color LED light-emitting diodes, that is, each dual-color pixel contains 2 LED light-emitting diodes.

For the three-primary full-color LED displayer, the diodes that make up the pixel include 3 or more, such as 3 diodes that emit red, green and blue light respectively, so that according to the three primary colors Color matching principle to achieve the purpose of color displayer.

In order to improve the displayer effect, some displayer screens may be composed of 4 diodes: 2 red LEDs, 1 green LED and 1 blue LED.

(2) Performance characteristics

①High-intensity light-emitting, under the refraction of sunlight, the content of the screen surface can be presented in high-definition within the visible range.

②The grayscale control level is high. Can use 1024 ~ 4096 grayscale control to displayer more than 16.7M colors clearly and vividly, ensuring the super three-dimensional image of the picture.

③ The driving power is large, and the scanning mode is mainly static latching to ensure high-intensity bright light.

④In order to ensure the best playback effect, the light can be reasonably controlled by the automatic adjustment function in different background environments.

⑤The circuit integration mainly relies on large-scale imported devices to improve the reliability of operation and is conducive to maintenance and debugging.

⑥Using modern digital processing technology to process video, mainly chooses the method of technology distribution for scanning, the design is modular, adopts static constant current drive, and automatically adjusts the brightness, so as to achieve high fidelity of the picture, no ghosting, and improve the quality of the image. clarity.

⑦ There are various types of information displayer, such as icons, videos, texts, animations, pictures, etc., and various forms of reality, such as networking, remote reality, etc., and the combination of common colors and craftsmanship.

2. What is the LED displayer composed of?

The main components of the led displayer: LED unit board, power supply, box, card and connection.

(1) LED unit board

It is one of the core components of LED displayer. The quality of the unit board directly affects the displayer effect of the displayer.

The unit board is composed of LED module, driver chip and PCB circuit board.

The LED module is actually made up of a lot of LED light-emitting points encapsulated by resin or plastic dot matrix.

(2) Power supply

The power supply generally uses a switching power supply, 220V input, 5V DC output.

Since the LED displayer screen is a precision electronic device, a switching power supply must be used instead of a transformer.

(3) Box

There are two kinds of boxes, including die-cast aluminum box and waterproof iron box.

The former is mostly used indoors and the latter is mostly used outdoors.

(4) Card

There are various cards in the displayer screen: sending card, receiving card, control card.

Used to receive and send signals, so that the LED displayer can work, play videos and pictures, etc.

(4) Connection

It can be divided into data lines, transmission lines and power lines.

The data cable is the cable used to connect the control card and the LED unit board.

The transmission line is used to connect the control card and the computer.

The power cord is used to connect the power supply, the control card and the LED unit board. The diameter of the copper core of the power cord connecting the unit board is not less than 1mm.

3. The advantages of LED displayer

(1) No splicing obstacle

Although the LED displayer screen is also spliced together by a piece of unit board, but because its light beads are encapsulated on the unit board, it can be seamlessly spliced when splicing, and the flatness is good, not like the LCD screen. the effect of the border.

So its brightness is very high and it supports adjustment.

In a well-lit environment, we can increase the brightness of the LED displayer to avoid reflections.

In some indoor situations with general lighting, we can turn down its brightness to reduce eye irritation.

These features make its application very flexible, which is also a unique advantage of LED displayer.

(2) Waterproof, sun-proof and moisture-proof

The LED displayer has the advantages of waterproof, sun protection and moisture resistance.

Therefore, it can be installed outdoors and has stronger environmental adaptability, which is an advantage that other electronic displayers do not have.

At present, outdoor advertising large screens, traffic light displayers, etc. are all LED displayers of different specifications.

(3) There are many specifications and a wide range of options

The main parameter of the LED displayer is the dot pitch, from the outdoor 20mm dot pitch to the indoor P0.9mm dot pitch, there are many specifications and models.

Users can choose corresponding specifications according to their own applications, and the price ranges from a few hundred yuan per square meter to tens of thousands of yuan per square meter, with a wide range of price differences.

4. The disadvantages of LED displayer

(1) General clarity

The clarity of the LED displayer is determined by the resolution, and the resolution is determined by the density of the light beads.

The smaller the light beads in the same area, the higher the resolution, and the clearer the image is naturally displayered.

Therefore, some LED displayers with large spacing are not as clear as those with small spacing.

But even the smallest pitch LED displayer, its clarity is still not as high as the LCD screen.

Especially when viewing at a close distance, there will be a mosaic phenomenon, so it is not suitable for viewing at a close distance. If you want to achieve better clarity, you can only try to choose products with small spacing.

(2) Low contrast

Relatively speaking, the color contrast of LED displayers is average.

Therefore, when displayering a relatively bright image, the effect it shows is not very vivid.

Especially when lowering its brightness the whole screen turns gray, not as colorful as an LCD screen.

(3) The light is easy to die, and the after-sales rate is high

The light beads of the LED displayer are often dropped during transportation, installation and use, resulting in the situation that individual pixels do not light up, so it will affect the overall image displayer effect.

If you want to repair, you can only weld or replace it by professional technicians, which increases the after-sales and later costs.

Therefore, the advantages and disadvantages of the LED displayer are still relatively obvious. We also need to know this when choosing. How to play its advantages and at the same time minimize its disadvantages as much as possible is what we want.