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Overview of LED display

LED has the characteristics of high photoelectric conversion efficiency, low driving voltage, ease of interface with a computer, and long replacement. The size of the screen can be seamlessly spliced ​​as needed, making LED the first choice for making flat panel displays.
Blue LED is a product that appeared in the late 1980s. The appearance of blue LED made full-color LED display possible. With the continuous decline in the price of blue LED chips, full-color LED display has gradually been applied, showing Bright prospects for the development of LED displays.
(1) Full-color-the light-emitting pixels that make up the LED display screen have three colors of red, green, and blue, and the combination of different gray levels of the three primary colors of transmission red, green and blue can better restore the colors of the natural world, with rich performance Theoretically speaking, its color reproduction ability exceeds that of TVs. Through the price drop of blue chips, the production cost of full-color screens continues to decrease, which will become the development direction of LED display screens.
(2) Video screen-Video screen means that the LED screen has a corresponding mapping relationship with the control computer display. The video screen has gray control and is displayed synchronously with the computer monitor. Therefore, it can play the animation, VCD, and connect with a special multimedia card. Play video signals with rich expressive power. The video screen cannot work without the computer. Generally, a computer controls a video screen.

LED display chip and drive mode

At present, LED full-colour displays generally use (R) red lights for Guanglei and (G, B) green and blue lights for Silan. The high-end die brands unanimously recognized in the industry are CREE, AXT and Japan’s Nichia. Our company can also use the high-end die to produce full-colour LED displays according to customer requirements.
1. CREE: American chip, it has good stability, strong anti-static, etc. It has been unanimously recognized by peers in the use of outdoor display screens. The brightness of pure green tube is up to (1500mcd or more, wavelength: 522-527nm extracted) blue tube brightness (Above 300mcd, wavelength: extracted from 472-477nm)
The maximum to the minimum brightness of the CREE tube is 1:1.2, and the Nichia’s is 1:4, which is six times larger. The brightness difference of other tubes, such as the Taiwan tube, is even more significant, and the brightness balance effect of the CREE tube is due to the brightness. The ratio difference is small and better than other tubes. CREE’s wavelength error rate is plus or minus 0.5nm, while the Nichia wavelength error rate is plus or minus 4nm, which is 1.6 times higher. Other Taiwan tubes’ wavelength error rate exceeds plus or minus 4nm and is more significant than 1.6. Times. CREE adopts single-electrode packaging, which is the best anti-counterfeiting and no counterfeit products. However, Nichia tubes in the domestic market are not strong enough in anti-counterfeiting, and there are often fakes.
2. AXT: The AXT chip of the United States is divided by Dalian Lumei Company. Its brightness is high, and the stability is relatively good. This year, it has been used mostly in outdoor display screens among industry manufacturers. Our company uses a pure green tube with a brightness of more than 2000mcd, extracted from the wavelength of 523-528, and a blue tube with a brightness of more than 350mcd, and the wavelength: extracted from 622-627.
3. Taiwan Opto Lei and Guolian Red Tube are the most widely used in full-colour displays. The red tube’s brightness is above 650mcd, and the wavelength is extracted from 622-627.
4. The central wavelength of the LED display produced by our company is in the range of 5 nanometers, the led display chip size is 13mil or more than 14mil; the waterproof performance of the sealed box is IP65, the gray level is 256, the flatness is good, the white balance reaches 6000CD or more, The frame rate is above 60 Hz per second, and the refresh rate is 480 Hz per second. The above main performances have reached the industry-standard C level

How to choose an LED display

LED display screens have been seen everywhere in people’s daily life, so when you need to buy LED display screens, you need to consider some factors?

According to the environment, LED displays are divided into indoor LED displays, outdoor LED displays, semi-outdoor LED displays.

LED display screens are divided into colours: full-colour LED display, dual-color LED display, monochromatic LED display.

LED displays are divided into outdoor advertising LED display, rental performance LED display, indoor conference LED display, interactive LED floor display, spherical LED display, transparent LED display, car LED display, light pole LED Display screen.

LED display screens are divided according to the model indoor: P0.976, P1.25, P1.56, P1.667, P1.923, P2, P2.5, P3.0, P3.91, P4, P4.91, P5, P6, P7.62, P10 indoor full-colour LED display.

According to the model size, the LED display is divided into P2.5, P3, P3.91, P4, P4.91, P5, P6, P7.62, P10 outdoor full-colour LED display.

Currently, we use the most full-colour LED display indoor and outdoor. How to choose a suitable LED display?

Dot spacing: the distance from the center of the lamp bead to the center of the lamp bead is called the dot pitch, in mm (millimetres). First, you need to select the viewing distance. Take p4 as an example. The best line of sight distance is 4 meters or more. It requires observing the closest viewing position from you to determine which model to choose. (Common for indoor and outdoor large screens)

Specific size requirements: You need to know the specific parameter values, such as length and width, actual size, size is divided into display size and actual hemming size, the display area size is smaller than the actual hemming size.

Here to talk about the LED display module: the module’s size is uniform, so when you give the manufacturer the size, the actual area will be larger or smaller than the size you give. For example, p4 module size is 256mm * 128mm, p3 size 192mm * 192mm, p5 size: 320mm * 160mm, the manufacturer will calculate the actual display size according to the situation.

Example: To make a P4 4 * 3 meter LED display (actual size), the display area length is: 4 / 0.256 = 15.625 take one, 15 * 256 = 3.84 meters, width 3 / 0.128 = 23.44 take the integer 23, 23 * 128 = 2.944 meters. The actual display area is 3.84 * 2.944 = 11.3 square meters, plus the edge size is close to the actual size of 4 * 3 meters. The actual size is 4 meters * 3 meters = 12 square meters, the display area will be less than 12 square meters.

The price of outdoor and indoor LED displays is different. Indoor LED displays are attracted by magnets, mainly from the front. Compared with the indoor LED display, the outdoor LED display is much more complicated in the production process. It needs to be IP65 dustproof and waterproof, and the electronic components generally operate under high and low-temperature conditions. The indoor LED display module on the outdoor LED display has high brightness and needs high-brightness lamp beads; the outdoor module uses waterproof glue on the PCB board, the cabinet is waterproof, and the outside is the exterior. In extreme environments, it must add Air conditioning, which inevitably raises the price of outdoor LED displays.

When purchasing products, you also need to understand the strength of the supplier. There will always be a small problem when the product is right. At this time, you need a well-reputed supplier to give you high-quality service. A high-quality supplier has attentive service and an after-sales team. To save customers worry and effort, this is the right LED display supplier.

floor led display

One of my overseas floors led display shopping experience

I am in the United States, and my name is Jacy. We have a performance hall. The stage has a rental LED display background. Recently, we plan to consider buying LED floor display for stage performances. The boss hopes that the dance will be more atmospheric and beautiful. When the camera is shooting, only the LED background on the stage increases the viewing effect, so I want to buy a display screen displayed on the ground.

Due to the recent epidemic in the United States, it is challenging to buy many products; life is worrying! Many supermarkets here are closed, many restaurants are also closed, let alone buy better electronic products. The US epidemic is indeed too difficult! The number of employees and performances in our stage art industry is also decreasing day by day, so it is essential to increase the stage’s dynamic fashion effect. The conventional stage rental LED display in the United States is easy to buy. However, the cost is relatively high, and the display quality is still inferior. I have visited many manufacturers. I heard that the cost is still very high. I heard a friend say by accident: “Why don’t you have to think about buying abroad. There are many LED electronic products in China. Especially in Shenzhen, the world’s LEDs look at China, and the Chinese LEDs look at Shenzhen! Their LED display effect is good, and the cost is meagre!” I felt overjoyed and found new hope!

But we have never bought LED electronic products abroad. We are anxious about the quality of the products. Will we encounter scammers? What is the quality of Chinese factory service? If there is a problem in one of these problems, then I will lose a lot. Later I found a friend named Antaki, who often buys products in China. And I asked him to introduce several Chinese manufacturers specializing in producing interactive LED floor tiles. Finally, I was fortunate enough to meet Creuview manufacturers. Scott has 12 in the LED display industry. Years of experience specializing in the production and development of LED displays. Especially in interactive floor LED display screens, it has its advantages and is independently developed by itself!

floor led module

To buy a satisfactory Floor LED display, the display effect is stable and precise. We compared a few at the beginning and asked them to send in the floor tile LED display modules for testing. The products include acrylic masks, tempered glass masks, and It is Scott’s professional interactive LED floor tile screen kit. After comparison, we unanimously agree to use this interactive LED floor tile screen kit and module. 2. Some companies can only accept renminbi and can only enter individual Chinese personal accounts. The remittance fee is expensive; some companies have overseas corporate bank accounts, which can directly accept US dollars. The remittance fee is low; whether there are overseas bank collection accounts is also correct. It is also significant for us. 3. The company’s service quality can meet the installation and debug of interactive LED floor tiles. In the final comparison, we chose Creuview to cooperate, signed the contract, transferred the advance payment, and paid the final payment after production!

led display delivery

Summary of solutions to LED display failure problems

Fault problem one: the whole box is not displayed

Reasons for failure: 220V power supply line is not connected correctly; network cable transmission is problematic; receiving card is damaged; HUB board is inserted misplaced.

Troubleshooting method: check the power supply line; confirm to replace the network cable; replace the receiving card; reinsert the HUB.

Fault problem two: the whole screen spends much time, and the picture changes

The cause of the failure: the driver is not loaded correctly; the network cable between the computer and the screen is too long, or the quality is not good; the sending card is broken.

Troubleshooting methods: re-operate to load the receiving card file; reduce the length of the network cable or replace; replace the sending card.

Fault problem three: the entire display screen displays the same content on each display unit

The cause of the failure: We did not send the display connection file.

Troubleshooting method: reset the sending screen file, and insert the network cable connected to the computer into the sending card’s output port near the indicator when sending.

Fault problem four: the display brightness is very low, and the display image is blurred

The cause of the failure: the sending card program is wrong; the function card setting is wrong.

Troubleshooting method: restore and save the default settings of the sending card; set the minimum brightness value of the display monitor to be above 80.

Fault problem five: the whole screen is shaking or ghosting

The cause of the failure: check the communication line between the computer and the large screen; check the DVI cable between the multimedia card and the sending card; the sending card is broken.

Troubleshooting method: re-plug or replace the communication line; reinforce the DVI line; replace the sending card.

Need to pay attention to those problems in the use of LED display

Outdoor led display screens are faced with the following problems before they are installed and used. These problems must be dealt with for led display screens to operate safely.

1. The led display screen is installed outdoors, often exposed to the sun, rain, wind and dust, and the working environment is harsh. Electronic equipment getting wet or severely damp can cause short circuits or even fire, cause failures or even fires, and cause losses.

2. The led display screen may be attacked by vital electricity and magnetism caused by lightning.

3. The environment temperature changes significantly. When the outdoor LED display screen works, it will generate a certain amount of heat. If the ambient temperature is too high and the heat dissipation is lacking, the integrated circuit may not work correctly or even be burned, making the display system unable to work usually.

Fourth, the outdoor led display has a broad audience, a long viewing distance and a wide field of view; the ambient light changes significantly, especially if exposed to direct sunlight.

The above are the unique requirements of an outdoor led display. Given these characteristics, the following editor summarizes some points for attention of outdoor led display.

1. The screen body of the led display screen and the joint between the screen body and the building must be strictly waterproof and leak-proof; the screen body must have reasonable drainage measures, and once accumulated water occurs, it can be discharged smoothly.

2. Install lightning protection devices on led display screens and buildings. The display screen and the shell’s main body are well-grounded, and the grounding resistance is less than 3 ohms.

3. Install ventilation equipment to cool down so that the outdoor led display’s internal temperature is between -10°C and 40°C. An axial fan is installed on the top of the back of the screen to discharge heat.

4. Use industrial-grade integrated circuit chips with a working temperature between -40°C and 80°C to prevent the low temperature in winter from causing the LED display to fail to start.

5. To ensure long-distance visibility under healthy ambient light conditions, outdoor LED displays must use ultra-high-brightness light-emitting diodes.

Sixth, the display medium of the led display uses a new wide-view tube with a wide viewing angle, pure colour, consistent coordination, and a life span of more than 100,000 hours. The outer packaging of the display medium is currently the most popular rectangular tube with a cover, sealed with silicone, and no metalized assembly; its appearance is exquisite and beautiful, sturdy and durable, with protection from direct sunlight, dust, water, high temperature, and circuit short circuit “Five defences” features.

Detailed solution for led indoor full color display | led screen

With the advent of the era of light and shadow, indoor LED displays are widely used in various fields. In order to better serve overseas friends, so that everyone can be more familiar with, understand, and apply LED displays. Now we introduce the detailed solutions and functions of indoor LED display to our overseas customers. We hope that you will have a better understanding of LED display and LED indoor full-color display.

  1. It has a photosensitive control system that automatically adjusts the brightness of the display according to the changes in indoor and outdoor light, which is energy-saving and environmentally friendly, which greatly reduces your operating costs.
  2. High refresh rates and high grayscale make the LED display more lifelike and meet the requirements of high visual quality for commercial use.
  3. The advertising content on the LED advertising screen can be changed at any time, showing different advertisements for different customers around the clock.
  4. The dual network cable hot backup function can be realized. Two computers control one screen at the same time. When one computer has a problem, the other computer will automatically take over to ensure that the screen works normally.
  5. The use of an efficient optical fiber transmission system effectively reduces the signal delay caused by the long transmission distance and ensures the consistency of the picture playback.
  6. All the displayed information can be controlled by a remote network, and the screen information can be easily replaced with a mouse click, so as to realize the clustering of advertising display networks in cities and regions.
  7. Support network control function, enabling you to control the display screens of several cities in one place, and change the content you want to play at any time.
  8. Equipped with an environmental monitoring system, allowing you to know the operation of the display anytime and anywhere.
  9. Equipped with a multi-function card that can switch the display screen at any time by software timing or manually to realize the unattended function.

Advantages and wide application of LED rental screen

With the maturity of LED display technology, LED outdoor surface mount full-color mass production. Makes the LED rental display widely used in the light and shadow industry! This is also one of the focuses of future promotion! Collect and summarize some knowledge about LED rental screens here, hoping to help the majority of LED display workers!

LED rental screen (LED screen rental) is a special LED display screen used for stage performances and cultural activities. It usually appears in the form of rental, so it is named LED rental screen.

It is widely used in stage leasing, singing and dancing evening parties, various conferences, exhibitions, stadiums, theaters, auditoriums, lecture halls, multifunctional halls, conference rooms, performance halls, discos, nightclubs, high-end entertainment discos, etc., LED rental Compared with the traditional fixed screen, the screen has the following advantages:

  1. Lightweight, ultra-thin

The box of the traditional LED display is mainly SPCC (cold-rolled steel plate), commonly known as “iron box”. The thin plate is made into the shape of the box through processes such as bending, welding, and spraying; the cost is relatively low, but its disadvantages are: The box is too heavy, and the weight per square after the display screen is over 60kg, which is very heavy. The LED rental screen boxes used in the stage performance industry are basically die-cast aluminum boxes. The weight of the die-cast aluminum boxes is about 30-50kg/m2, which has the characteristics of lightweight and good thermal conductivity.

 

  1. A small error, zero stitching

Because the traditional LED display box adopts sheet metal processing methods, iron or aluminum plates are processed by bending and welding production processes. Due to the large error of such processing technology itself, it is easy to deform after processing, so the error is Millimeter level, it is difficult to meet the requirements of the display screen for zero stitching.

LED rental screen die-cast aluminum box body adopts the production process of module forming and machining, which can control the error within one-tenth of a millimeter, which can completely meet the requirements of zero seam.

  1. Quick installation

Because the cabinet is made of die-cast aluminum, it is lighter in weight, more accurate, and convenient and quick to disassemble. The technicians can splice a single cabinet within a few minutes, which greatly shortens the installation and disassembly time and saves labor costs.

  1. Long lifespan

The main component that affects the life of the LED display is the light-emitting diode (lamp). High temperature is the big killer of the light-emitting diode. The good heat dissipation and thermal conductivity of the aluminum box make the ambient temperature relatively stable, which can greatly extend the display screen. life.

To Support the arbitrary direction of the signal line, meet the arrangement and placement of different cabinets, to create different effects of the picture;

The lightweight, ultra-thin, and fast installation design allows you to complete the installation and disassembly of the display in a short time;

Equipped with a professional video processor, supporting AV, DP, VGA, DVI, YPBPR, HDMI, SDI and other signals;

Support 256-level brightness adjustment and white balance custom adjustment, so that different batches of displays can be used in a mixed manner;

Signal processing: RTF series products adopt signal folding technology, unit modules do not need to be cascaded, which greatly improves the display performance of the product. Using signal folding technology, unit modules do not need to be cascaded, greatly improving the display performance of the product;

Mask: It adopts a matte black mask. The rear buckle is used to fasten the mask. The LED light can be easily maintained in the front. The fastening screws are not visible on the front of the mask. The screen surface has good integrity and there are no screws when the screen is lit. Bright spots caused by light leakage;

Modules: Large modules are used, with only 4 modules per cabinet, reducing internal connections and improving product stability. Without opening the box, the display module can be directly disassembled from the rear of the box.

Back cover: Remove 4 screws and remove the back cover to maintain and replace the power supply and receiving card;

Radiator plate: The aluminum base plate is used to replace the traditional plastic bottom shell, which improves the heat dissipation performance of the product while ensuring flatness;

IC and driver: high refresh rate, high grayscale, high refresh rate, high grayscale 16384 grayscale products use high-end constant current driver chips with built-in PWM. In the case of a single receiving card loaded, the display refresh frequency can be as low as 960HZ and as high as 4800HZ. The gray level is up to 16bit, and the picture is stable, which can easily meet the requirements of high-end applications such as stage performances and broadcasts. The DC power cord adopts American standard wire, the power input adopts a surface mount socket, the power cord is not easy to lose, the line loss is minimal during the power transmission, and the input voltage is stable;

Compatible: The new structure design meets the requirements of hoisting and stacking, as well as indoor and outdoor requirements. Single cabinet, compatible with multiple pitches, compatible with indoor and outdoor modules;

High: High grayscale and high refresh rate design, grayscale 14 bit, refresh frequency >960Hz;

Low: Excellent heat dissipation design and heat dissipation performance, no external fans, air conditioners, etc., low noise; lightweight of the cabinet, low installation cost; low power consumption of the cabinet, saving operating costs;

The good waterproof effect, with IP65 protection level, suitable for outdoor rental use;

Equipped with various specifications of the air box, which is convenient for storage and transportation of the box, and has a good protective effect on the LED display.

The LED rental display is light in weight, thin in structure, and has the functions of hoisting and quick installation, so as to meet the requirements of fast installation, disassembly and transportation required by the rental occasion; easy to install and unload, easy to operate, the entire screen is fixed and connected by fast bolts, which can be accurate and The screen can be installed and dismantled quickly, and can be assembled in different shapes to meet site requirements; unique process: unique structural design of welding process optimization, to avoid faults caused by poor contact of electronic product solder joints caused by frequent handling.

How to install indoor LED display?

In order to let more friends understand the installation of LED display, as a professional manufacturer of LED display in the industry, it is the responsibility and responsibility to introduce the correct installation method of the LED display to friends. The following are installation instructions and precautions for indoor LED display magnets, please refer to:

  1. Make a steel frame structure (made according to the size requirements of the drawing), and then fix the finished shelf on the wall or hang it. can.
  2. First, connect the module power cord to the power supply, each power supply is connected to two one-to-three or three one-to-two power cords, according to the manufacturer’s configuration number, pay attention to the positive and negative polarity, the red wire is connected to the positive and the black wire Connect to the negative pole. Then fix the power supply in the corresponding position and fix it according to the position of the drawing. Connect the power supply directly to the 2.5 square cables, and pay attention to the live wire and the neutral wire not to be reversed. Usually, the red wire is connected to the live wire (L), the blue wire is connected to the neutral wire (N), and the yellow wire is grounded. The wiring sequence must be uniform and cannot cross;
  3. Fix the receiving card in the corresponding position, and fix the position according to the drawing. Connect the power cord of the card to the output end of the power supply in the same way as the power cord of the module. The power terminal of the receiving card is marked with positive and negative poles or 3-6V and GND. The GND terminal is connected to the black wire, and the 3-6V terminal is marked to be connected to the red wire. Don’t reverse it. Then insert the long flat cable into the receiving card. There are many sizes of the long flat cable. Pay attention to the order of length according to the distance between the card and the module. Do not plug the cable backward. Generally, the sockets are fool-proof and are not easy to plug them backward. Then connect the receiving cards in series with a network cable. Now the network port of the receiving card basically has no distinction between input and output. The previous old card should be in the order of left in and right out. The serial sequence of the network cables should be connected in a U-shaped or N-shaped sequence, and do not cross randomly;
  4. Put the magnets on the module. Generally, there are 4 magnets on each module (that is, four magnets on the opposite corners). Generally, the standard configuration of the manufacturer is 4 magnets for each module. According to the size of the module and the module on-site, The actual weight of the magnets is subject to the ability to hold the module. Insert a short cable into the output end of the module (for the output of the module to the input end of another module). Fix the modules on the steel frame in order, pay attention to the space between the top, bottom, left, and right when installing, do not misalign, and the flatness should be consistent. The long cables from the receiving card to the module are arranged in order from top to bottom. Start the installation from top to bottom. Each module must have a cable and power cord connection, which can not be omitted. After installation, you can power on and debug.
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