Category Archives: Üzleti hírek

Teljes színű LED kijelző, as a key medium for advertising, information content and video, is increasingly following the fashion trend of the stage. Super clear video can often give people a more vibration of the visual effect, the content will be more real.

There are two factors for high-quality display, one is that HD film source is required to be HD, and the other is that HD screen can be applied. In fact, the full-color LED display is also improving the clarity. So, how can we make the display more clear? Let’s have a rough analysis:

1、 Saturation of full color LED transparent display

Általában véve, the higher the saturation, the clearer the image is and the more distinctive the color is. It is very helpful for the definition of image, the main performance of key points and the main performance of gray level.

In some words and videos with great difference between black and white, high contrast led full-color display has advantages in black and white gap, clarity, integrity and other aspects. In view of the dynamic video effect, the harm is bigger, because the light and dark transformation in the dynamic image is faster, the higher, the easier it is for human eyes to distinguish the whole process of such transformation. The development of color of full-color LED display can reduce the transmission of the surface layer of the screen. azonban, the higher the color is, the better it will be. If it is too high, it will backfire. Light pollution has become a hot topic in the past, which will harm the natural environment and groups if it is too high. The panel and led of full-color LED display have unique processing technology, which can reduce the transmission and increase the saturation.

2、 Scale value of gray scale

The gray value refers to the chromaticity value that can be differentiated from dark to bright in the single primary color of the display screen. The higher the gray value of the full-color LED display screen is, the richer and more vivid the color is; conversely, the color is single, and the transformation is simple. The enhancement of the mark value can greatly improve the color depth, which makes the image display level increase in geometric total number. The gray control level of LED is 14 bit to 16 bit, which makes the key points of image level identification and display effect of high-grade display products reach the high-quality level. With the development of hardware technology, led gray scale will continue to improve high linearity.

3、 Reduce the interval

The smaller the interval of full-color LED display, the more detailed the interface. This requires perfect technology as the management center, and its capital investment cost is relatively large, resulting in the high price of full-color LED display screen, but fortunately, the sales market in the past is also moving towards small interval LED display.

4、 Developing the contrast of full color LED display screen

Általában véve, the higher the specific illumination, the more clear and conspicuous the image is, and the more unique and vivid the color is. High specific illumination has a great help to the clarity of the image, the main performance of key points and the main performance of gray level.

In some text and video display with great difference between black and white, high specific illumination full-color LED display screen has advantages in black and white gap, clarity, integrity and other aspects. It is more harmful than the illumination related dynamic video display effect, because the light and dark transformation analogy is faster in dynamic images. The higher the contrast is, the easier it is for human eyes to distinguish the whole process of the transformation. In fact, the development of the contrast of full-color LED display screen is mainly to develop the chromaticity of full-color LED display screen and reduce the surface transmittance of the screen body. azonban, the higher the color is, the better it will be. On the contrary, if it is too high, it will be counterproductive. Light pollution has become a hot topic in the past. If the brightness is too high, it will harm the natural environment and groups. The unique processing technology of LED panel and led interruption can reduce the transmittance of LED panel and develop the contrast of full-color LED display screen.

Half of the outdoor LED display screen or flower screen is caused by the following two factors:

1. When the outdoor LED display screen is half opened, there is no display or half display

If the LED display screen is not displayed or half displayed, it is a common fault in the LED display screen, and the fault condition of the display half is also very common. It is often mainly manifested in that only a part of the content that must be displayed can be displayed, and the advertising intention and brand image of the store can not be presented in detail. Általában, there are many factors that cause the fault condition, and the factors are generally internal Due to the aging of the power supply circuit, the power supply line is cut off, some display modules can not get all normal power supply, or the LED Driver IC with poor characteristics can not work well or work abnormally, resulting in the current supply can not always be distributed. This kind of solution is similar to the previous one, and the matching switching power supply line needs to be removed to make the display inside In order to ensure the normal distribution of Ji current in each phase of the driving IC, it is necessary to ensure that all phases of the driving IC are normally distributed and the balanced and stable operation can be achieved.

2. Part of the outdoor LED display screen status

Part of the LED display screen is one of the common faults of the front door signboard LED display screen, because the customer is not a professional. Ebből adódóan, the flower screen of the front sign display screen often causes many troubles to the customers. If the fault can not be handled immediately and harms the brand image and advertising effect of the store, he feels that he has more heart than strength. This fault condition is aimed at the professional As far as personnel are concerned, it is one of the more subtle faults. The main factors are the long-term application of the display screen, the aging of internal transmission data lines or the instability of the selection of fake and inferior brands for the module board driving IC. The solution is to replace the matching aging accessories or overhaul the module board failure driving IC until the display screen returns to normal display.

There are two ways to control LED video wall display’s grayscale: one is to change the current through, the other is to adjust the pulse width.
1. Change the amount of current passing through the LED. Általában, the current flow of LED tube is about 20 MAH during continuous operation. Except for the saturation state of bright red LED, the gray level of other LED is mostly proportional to the current passing through;

2. Using the plasticity of the visual effect of human eyes, using pulse width modulation to complete gray level control, that is, regularly changing the light pulse width (i.e., the swing rate). If the cycle time of this repeated lighting is short enough (i.e., the screen refresh rate is sufficiently high), the human eye can not feel the bright pixels are trembling. Because the pulse width modulation is more suitable for data control, today, when microcomputers are widely used to show the information content of LED display, basically all LED screens use pulse width modulation to control the gray level. The control system software of
LED is generally composed of main control chip box, scanner board and display and control equipment. A
main control chip box obtains the chromaticity data information of a screen pixel from the display terminal of the electronic computer, and then distributes it to several scanner boards. Each scanner board controls multiple rows (oszlopok) on the LED screen, and the display and control data signals of each row (column) are transmitted by serial communication.
jelenleg, there are two methods of serial communication to transmit display information control data signal:
1. One is the centralized control of the gray level of each pixel on the scanner board. The scanner board dissolves the gray value of each big bank pixel from the control box (azaz. pulse width modulation), and then transmits the enabling data signal of each bank led to the corresponding LED in a single pulse mode (lit as 1, not lit as 0) by serial communication method to control whether it is on or not. There are few components used in this method, but the amount of information transmitted by serial communication is very large. In a period of repeated lighting, each pixel must have 16 monopulses at 16 levels of gray level, és 256 monopulses at 256 levels of gray level. Because the output power of components is limited, the LED screen can only guarantee 16 levels of gray. One is pulse width adjustment. The content of scanner board serial communication is not the power switch data signal of each LED, but an eight bit gray value. Each LED has its own pulse width modulator to control the lighting time. In this way, in a cycle time of repeated lighting, each pixel only needs 4 monopulses at 16 levels of gray level, and only 8 monopulses at 256 gray levels, which greatly reduces the transmission frequency of serial communication. A 256 level gray level control can be easily completed by using this kind of decentralized control method.

the difference between the performance stage led rental screen and the traditional indoor and outdoor LED display screen.

1、The design is different. In the whole process of performance, the LED electronic display screen accepts the training from the audience on the spot and its live broadcast. Its modeling design is more independent and bold than the traditional indoor and outdoor LED screen. The actual effect of playing video interface should be very clear. In the whole process of live broadcast, the interface appeal should be smooth, of course, so the general room P3 and P4 high-definition screens are used for internal air, and even more stringent ones will be applied to small interval p2.5 and P2, and P6 and P5 specifications will be adopted for outdoor. The traditional indoor and outdoor LED display screen, because the viewing distance or display information requirements are not high, P5, P4 model specifications are generally used in the room, and P10 is the largest number of outdoor applications, followed by p16.

2、 The cabinet is different. For the traditional outdoor LED display screen, the box body is waterproof solution, and the structure is relatively heavy; while in the room, the simple LED box is used; for the stage rental LED display screen, because the box is often disassembled and moved, the die-casting aluminum box is generally used.

3、 The installation method is different. Például, after a tour, the LED display screen can be disassembled and transported to another stage for construction. The traditional indoor and outdoor LED display screen is generally mobile installation method. After the installation position is fixed, it is not easy to move.

4、 Maintenance methods are different. In case of some common faults, the rental LED screen can carry out the maintenance work of some modules. In the whole process of the performance, the damaged modules can be quickly replaced to ensure the normal development of the show.

United Huiye has complete types of photoelectric products and diversified products. Its products are widely used in real estate industry, media advertising field, game entertainment culture and art field, transportation and travel induction field, stb. with extraordinary product quality and excellent brand service, it is loved and recognized by customers.

Nowadays, LED screen is more and more used, so if LED screen is abnormal, how do you deal with them? Általában véve, according to the feedback from previous customers, the full-color LED display has the following standards and maintenance methods:

1. The whole interface is not a sporadic light spot, also known as small black spot, bad light spot and dead light spot. (if there is no field, if the failure rate is within the scope, the display will not be affected), the whole screen will be colorful.

2. LED indoor full-color screen has output power jump box, the actual operation is repeated as well. (when the supply line of short-circuit inspection is very positive, the terminal of negative switching power cable is to see whether there is the next touch, as well as the power supply master switch; one is to lower the wire mesh of the object)

3. LED display screen a row of abnormal results show that a flash of miscellaneous points. (from the beginning of the board in the abnormal important parts, check whether the line row is loose and whether the interface technology of the board and wire row is damaged. If there is any problem, the line bank or the common fault board must be replaced.)

4. The LED display screen does not display large, black. (considering the problem of transmission of the first driving force, the power supply master switch looks up to see whether the power is released or not. If the cable is loosened and the signal is not pushed in the past, there is a problem in accepting the damaged memory card; clearing one can find a solution)

5. When the LED display screen plays video or pictures, the system on the computer can show that the economic development of different regions is normal, but sometimes the screen is jammed and crashes. (generally, it is difficult to control the quality of network cable. The packet loss caused by the whole process of technical transmission of video information content and data information results in the crash of the screen. The replacement of the network cable with better working quality can be processed.)

6. A LED board on the display screen shows a flashing square, miscellaneous spot, and a number of lights in parallel display are abnormal. That’s the board problem. It’s OK to replace the board with abnormal display. The installation of screen wall in the room is generally magnet suction, and the board can be replaced with a little force.)

Figure 7. LED large screen has an area display board display abnormal, such as all the arbitrary tone in the photo flash. (generally, it is a difficult problem to accept the card. Check which receiving card controls the total area and replace the receiving card to solve the problem. )Maip

8. The electronic computer and the Internet cable Maipu honor LED large screen network cable are properly connected, and the mobile phone software will remind “no search for large screen system software”. Even if the LED screen can play pictures and videos normally, the mobile phone software is all set to transmit data unsuccessfully and chroma push. (generally, the push card is not good, please replace the push card and solve the problem)

9. The software dialog box of LED display screen shows that everything is normal, but the interface on the screen is disordered, displayed separately or divided into several dialog boxes to independently study and display the same interface. (it’s a problem in the system software setting. If you go to China, you can choose the appropriate settings according to the settings.)

10. It should be displayed on the desktop LED display screen. (if the LED is not equipped with a video processor, this feature will not be implemented; if it is equipped with a video processor, the adjustment can be carried out in the video processor, and the screen area will display the same step to the led to display the Mai Pu style color.)

LED display screen as the most important contemporary research display equipment, we not only need to understand its strong role, but also must be grasped by students. It is all about the basic maintenance management scheme of LED display screen.

From LED chip manufacturers in the upstream and downstream, LED packaging manufacturers in the middle and lower reaches, system software manufacturers such as application LED video display screens, and manufacturers of electronic devices and daily necessities of computer and television terminal equipment, they will discuss miniled, and even have a lot of capital investment, human resources and other resources Do it on miniled.

At this stage, we can see that miniled is the top priority of the packaging manufacturer crystal stage and Guoxing Optoelectronics in this year. Considering its own advantages, Guoxing optoelectronics actively improves the technical specifications and manufacturing process of miniled backlight, improves the cost control ability, and boosts terminal equipment manufacturers to expand the main uses of miniled backlight technology. For the miniled display application to take off and land, Jingtai will greatly increase the capital expenditure to more than 6 billion yuan in 2020, of which more than 5 billion yuan has been invested in the production capacity configuration of miniled, és 80% of which is used to purchase machinery and equipment, which is estimated to be installed by the end of this year or the first quarter of 2020.

Továbbá, Li Dongsheng, who also has TCL high-tech technology, is also blunt: “miniled is the top priority of everyone in 2020.” Others, such as Konka, ASUS, Qun Chuang, Youda, BOE, stb., compete to release miniled backlight or similar technical TV, kijelző, VR and vehicle display terminal equipment. In this series of practical operation, what brings miniled to the air outlet of optical display manufacturing industry?

Policy: according to the overall plan of the state, the sales volume of 4K TV sets that meet the requirements of high contrast will account for 40% this year, and will be popularized in all directions in 2023, while the sales volume of 8K TV sets will exceed 5% ban ben 2023. In contrast, one of the key technical defects of DLP, laser projection, OLED, LCD and so on depends on the low contrast. Relative, only miniled can consider high contrast.

The demand of large-scale market: the key characteristics of miniled compared with small spacing led depend on the specification can ensure larger and smaller spacing. The continuous growth of large-scale display in China is creating unprecedented opportunities for miniled display. The key application fields of miniled are conference hall, command system and other places with high-end display requirements. Its specification can be 150 inches or larger, which fills the shortage of LCD and other display products in the specification level.

Ultra high definition development trend: in addition, with the announcement of 5g commercial floor type and ultra high definition policy this year, miniled products have been applied in scenarios including security monitoring system, high-end commercial display, conference hall, radio program performance, stb. miniled, which is easier to complete commercialization, has become the focus of LED companies to grasp the development trend opportunities of ultra high definition display.

In general, the policy guidance, large size requirements, 5g and extremely high-tech development trend make miniled very popular at this stage. In the future, with the continuous improvement of 5g and Internet of things, the regulations on LED display screen in various fields will be higher and higher. In the next 2-3 évek, miniled will become the popular application space in the LED display saes market

So what are the inspection methods of LED display and how should customers do well in the inspection of LED display?

1. LED display resistor detection method: for the LED display screen resistor detection method, we need to adjust the multimeter to the resistor, first detect a point to ground resistance value of a piece of normal circuit board, and then test another same circuit board of the same point to detect whether it is different from all normal resistance values. If not, you will know the scope and phase of the LED display screen problem On the contrary, they ignore it.

2. LED display screen working voltage detection method: LED display screen working voltage detection is to adjust the multimeter to the working voltage, detect the abnormal power supply circuit a point of the working voltage to the ground, is more normal than before, so that it can be convenient to identify the problem.

3. LED display short circuit detection method: LED display short circuit detection method is to switch the multimeter to the short circuit detection gear, so as to detect whether there is a short circuit condition. If there is a short circuit, it should be handled immediately. The short circuit condition of LED display is also a common fault of LED display module. Továbbá, the short circuit detection should be carried out under the condition that the power supply circuit is turned off, so as to avoid damaging the multimeter.

4. LED display voltage drop detection method: the LED display voltage drop detection method is to adjust the multimeter to the diode voltage to carry out the downscaling detection. Since all the IC of the LED display screen is composed of many modules, when there is a current amount on a pin, there will be current on the pin. Under all normal conditions, the voltage drop on the IC pin of the same model and specification is similar.

In view of the above several types of LED display screen maintenance methods, we can remember it, not in the case of regular implementation of detection, to prevent the damage of LED display, but also very good to increase the life of your LED display. In this way, it can not only prolong its use time, but also save the following extra expenses and budget expenses. Since some LED display manufacturers have only one to two years of after-sales maintenance service, after this time of after-sales maintenance, if the maintenance is carried out again, there will be additional charges.

In terms of power consumption, although the luminous materials used by LED display screen are energy-saving, some of them need to be applied in the occasions with large display area. If it is used for a long time, the overall power consumption is still large, because the brightness required is relatively high. Under the effect of these comprehensive factors, the power consumption of LED flexible screen is quite amazing, so all the electricity borne by advertising owners Fees will also increase geometrically.

First, the system can automatically adjust the brightness.

According to the day and night, in different places, environments and time periods, a slight change in the brightness of the display will have a great effect. If the brightness of the LED transparent screen is 50% greater than the ambient brightness, we will obviously feel uncomfortable with our eyes, which will cause “light pollution”. Then we can collect the ambient brightness at any time through the outdoor brightness acquisition system, and use the display control system to receive the system data and automatically convert it into the brightness suitable for the environment to broadcast the picture.

Second, multilevel gray correction technology.

Ordinary LED display system uses 18 bit color display level, so in some low gray level and excessive color, the color will be displayed very hard, so it will cause color light not adapt. The new LED large screen control system uses 14bit color display layer, which greatly improves the excessive hardness of color, makes people feel soft color when watching, and avoids people’s uncomfortable feeling to light.

LED display energy saving methods have the following several?

By using high luminous efficiency LED, the light-emitting chip does not cut corners;

2. High efficiency switching power supply is adopted to greatly improve the power conversion efficiency;

The fan is designed to reduce power consumption;

4. Design a scientific overall circuit scheme to reduce the power consumption of internal lines;

Általában, in the indoor environment, the total area of LED display screen in banquet hall is more than 3 m2. Ebből adódóan, there are three plans to choose from under such conditions: General rear projection, DLP (digital liquid crystal rear projection) and LED display screen.

The advantages of general rear projection display screen are small pixels, high definition, low chroma, small angle and short cycle of camera lens lamp (only several thousand hours). DLP has the advantages of small pixels, high definition, and the defect is that there is seam. Jelenleg, the minimum seam can be mm. Rear projection and low temperature plasma display screen are suitable for close viewing. The advantages of LED display screen in the room are brighter, no seam, and the defect is that the definition of particles is coarse and the definition is low. At the present stage, commercial room full-color LED screen is more economic development, the model specification is p5p6, other model specifications are p3p4p8, stb. The LED display screen is suitable for viewing the space in the room with a long distance.

When using stage rental LED display screen in banquet hall, it can be considered from the following aspects:

1 die. As with outdoor full-color LED screen, it is generally proposed that led of full-color display screen in the room should be led, and high-end products should be made from Japan, Japan and Britain.

2 package form. The advantages of surface mount packaging are large angle, good brightness consistency, easy to automatic welding production and processing, is the main product of full color screen.

3 density. Because of the high calorific value of the full-color LED chip in the room and the high density of the control loop, the point density of the commercial full-color screen can not be made very high.

4 drive method. The driving method of full-color LED screen in the room is constant current power supply, and dynamic scanner method is selected

5 refresh rate. Improve the refresh rate, no flicker or tailing in the camera.

Other factors, including the scale of LED display manufacturer and famous brand, price, main use, installation location and environment, are some suggestions on the selection of LED screen in hotel banquet hall.

Flexible LED display screen refers to the LED display screen which can be bent at will without being damaged. Its PCB circuit board is made of a unique flexible raw material, which is not easy to break due to bending. It is commonly used in column screen in large shopping malls and other LED display screens with various unique samples. With the rapid development trend of LED display manufacturing industry, the production technology of flexible LED display screen has already been improved. Various customized large LED screens can also be carried out by flexible LED display screen, which makes it more and more popular in the sales market. So, what’s going on to make flexible LED displays so popular in the market?

1) Flexible LED display screen is easy to bend, and can complete a variety of installation methods, such as vertical installation, suspension installation, embedded installation, hanging installation, stb., which is limited by the installation area, and has universal main use. It can complete the installation of various exquisite and creative LED display screens.

2) Flexible LED display screen has the function of anti blue light and eye protection, which can reasonably prevent the damage of high-definition blue light to the eyes, and prevent long-term response to the display screen causing visual fatigue. At this time, the blue light can not replace the function of the large-scale display screen, which can not be used to broadcast the contents of large-scale shopping malls.

3) The small interval flexible LED display screen with the resolution interval of p1.667, P2, p2.5 is more suitable for the installation in the room. Even if it is installed in the area close to everyone, it can also display the information in an ultra clear way. The refresh frequency is 3840hz, and has a high screen resolution. The interface recovery is improved. The gray value is too much, and the texture is clear.

4) Low energy consumption, super environmental protection and energy saving. The larger function loss of flexible LED display is 240W / M ~ 2, and the average function loss is 85 w / M ~ 2, which greatly reduces the power consumption loss and improves the utilization rate of power engineering. Especially for the LED display screen, ultra-low energy consumption can save a lot of water and electricity expenses every year.

5) The main use is universal. Flexible LED display can not only be used as a basic LED display, but also used in unique industries. It can also be used to make artistic and creative special-shaped screen, columnar screen, spherical screen and curved screen.

Flexible LED display is widely used, not only in China’s sales market is more popular, but also in foreign sales market. Most of the LED columnar screens in major shopping malls and special-shaped LED displays in leisure and entertainment clubs are all flexible LED displays. It is very easy to consider people’s aesthetic views in terms of beauty and flexibility, which can be used for decoration design, video advertising, cultural and art publicity planning, stb., so as to achieve the actual effect of one screen Fruit. Flexible LED display screen, in line with the pursuit of perfection and humanization, is a video display system integrated into social development, social and economic development. Whether in today or in the future, there is a great development trend of indoor space to consider the increasingly prominent personalized customization requirements.

The technological progress of digital display and infrastructure and the decreasing cost make it possible to splice the large LED screen into a striking video wall, thus meeting the needs of enterprise hall, store advertising and broadcasting equipment.

In high profile projects such as flagship retail stores and large public spaces such as airports and railway hubs, the effect is obvious. But in fact, large video walls are also being deployed in places that may not attract media attention and discussion.

The following is a brief introduction to the use case of large screen splicing video wall signage solution, which involves narrow frame LCD display technology and small spacing LED screen.

1. Retail

In particular, clothing retail stores use a large number of monitors in their high-end stores to enhance the brand and help set the atmosphere and atmosphere of the store. Some retailers also use splice walls at entrances or other major decision points, such as at the top of stairs or escalators. In some cases, especially in consumer electronics, display technology is used throughout the shop walls, making it an active decoration.

2. Enterprises

The characteristic walls of office buildings in large enterprises began to use full-color LED display or LCD walls to show the achievements of brands or companies. In some cases, dynamic or generated data were used to make them public artworks. In the latter, real-time data (such as weather or traffic information) directly and automatically help organic digital art to change with the data. At the same time, healthcare organizations use large LCD display walls with touch function to praise and interpret the contributions of major donors.

3. Control room

Police departments, security organizations, utility companies, and other large entities that process large amounts of information – need close attention – use large LED video walls in control rooms and operation centers to monitor activities through dynamic mapping, real-time data, and video window arrays. The video wall can turn into a huge dashboard that the entire team can quickly view and react if needed.

4. Advertisement

Large format printing patterns on posters and light boxes are gradually being replaced by wall splicing technology. This shift is due to the decline in display costs, and media companies can add full dynamic graphics and videos, arrange multiple files instead of one file, and update them in minutes, even without shutting down. Moreover, audience measurement technology increasingly eliminates guesswork in the content of digital signs.

5. Broadcasting

Ultra narrow frame liquid crystal displays and small spacing LEDs are increasingly used in local and national broadcasters, replacing static backgrounds with digital versions that can change with the program, and even change themes in news and talk shows.

6. Hotel

Hotels, restaurants and cinemas use large digital walls around their facilities in various ways. A TV wall is set up behind the reception desk in large hotels to welcome guests, let them know about the hotel’s services and facilities, and provide entertainment during their waiting time for registration. Restaurants with sports and entertainment themes are moving from using a single TV hanging from the ceiling to installing giant TV walls in large rooms that can display large games or multiple games at a time.

7. Information

LED display screen factory Co., Kft. LED large screen for decades, arrival and departure display screen has been a part of the airport, railway station, bus terminal and other large transport hub, but the digital display wall technology is currently being used to expand the existing information. In particular, airports have begun to use wide tiled displays to create variable images at check-in counters and security areas. According to the schedule, the whole day can be changed, turned on or off, and the information on the screen will also change.

1. Laposság: The surface flatness of stage LED display screen should be within 1 mm, so as to ensure that the display image will not be distorted. Local bulge or concave will lead to dead angle of the display screen. The flatness is mainly determined by three aspects: ① production technology and materials; ② on-site steel engineering construction; ③ installation quality of display screen installation team.

2. Brightness and visual angle

A brightness of indoor full-color LED display screen should be more than 800cd / m2, and outdoor full-color LED display screen should be more than 1500 CD / m2, so as to ensure the normal display of LED display screen. Otherwise, the brightness will be too low to see the displayed image clearly. The brightness is mainly determined by the quality of LED core.

The size of visual angle directly determines the amount of visible area space of LED display, so the larger the better. The size of visual angle is mainly determined by LED chip.

3. White balance effect

White balance effect is one of the most important indicators of indoor LED display. In chromatics, when the ratio of red, green and blue primary colors is 1:4.6:0.16, the pure white will be displayed. If the actual proportion has a little deviation, the deviation of white balance will appear. Általában, we should pay attention to whether the white is blue or yellow green. The quality of white balance is mainly determined by LED chips, and LED chips also have an impact on color reducibility.

4. Color reducibility

Color reducibility refers to the color reducibility of LED display screen, that is, the color displayed on the LED display screen should be highly consistent with the color of the playback source, so as to ensure the authenticity of the image.

5. Whether there is mosaic and dead point phenomenon

Mosaic refers to the small four squares that are always on or black on the LED display screen, which is the phenomenon of module necrosis. The main reasons are: 1) the quality of the connector used in the LED display screen is not up to standard, and there are protruding or concave phenomena; 2) the LED lamp is not adjusted; 3) the sealing glue process is not qualified. Dead point refers to a single point which is often black on the LED display screen. The dead point is mainly determined by the quality of the LED chip.

6. Whether there are color blocks

Color block refers to the lack of color in a small area; the main reason is to control the IC and power supply, control the quality of circuit wiring.

7. Display screen appearance

Display screen appearance: it is the most intuitive, the most primitive to do the most preliminary evaluation of product quality. The appearance quality of LED display in banquet hall can reflect the quality of production technology and materials of the manufacturer.