1.Protection against direct lightning strikes: Install lightning rods on the support structure of the LED display (outdoor), indoor LED displays or LED displays with tall buildings next to them, you do not need to consider installing lightning rods.
2.For the counterattack of the steel structure, connect the rigid structure to the housing of the LED display screen, equipotentially, and ground. The grounding resistance is generally required to be less than 10 ohms. If the resistance does not meet the requirements, additional The artificial grounding grid. The lightning arrester should also be well grounded.
3. For the lightning current induced on the power line, install a single-phase or three-phase power surge protector on the power line. The cross-sectional area of the link wire of the phase wire cannot be less than 10mm square, and the cross-sectional area of the ground wire can not be less than 16mm square.
4.For the lightning current induced on the signal line, install a signal lightning protection device on the signal line. The signal lightning arrester is determined according to the signal interface of the system. If it is a network cable, install a network signal lightning protection device, and install a DB9 interface lightning protection device for the serial interface. The cross-sectional area of the ground wire cannot be less than 1.5mm square.
5.For the induced current of lightning strikes, a unified dedicated professional distribution box and power distribution cabinet can more comprehensively and effectively protect the entire circuit system from the interference of the lightning induced current.
Generally, no air conditioner can be used. If conditions permit, two fans with a diameter of about 500mm can be used, depending on the size of the installation space.
NO. Two, LED display screen with more than 20 square meter
1.If the LED display is installed against the wall and can protrude by one meter from the wall, it is recommended to choose the fan according to the area, and the fan should be installed in sequence above the side of the screen. If you buy an outdoor full-color LED screen with a ph16 of 80 square meters, it means that the fan you buy requires 6 axial fans with a diameter of about 600 mm. Make sure that there is a net inside to prevent the technician repairing the display from sucking in clothes and other things when repairing the display to prevent personal injury. For waterproofing, install the air outlet of the fan on the outside aluminum-plastic panel Aluminum shutters. The wall-mounted LED display screen can also be installed with air conditioners. Ensure that there is enough space for the air conditioner host without affecting the overall appearance of the wall. The choice of air conditioner is required. Generally, 1.5P, 2P and 3P air conditioners are used the most. Northern cities use 12 square meters of 1P air-conditioning calculations; southern cities use 9 square meters of 1P air-conditioning calculations. If the area of the LED outdoor display is relatively large, the air conditioner needs to be customized; if the area is not large, you can buy it at a specialty store, but you need to buy a display cooling air conditioner with call compensation function.
2.If the LED display is installed on a column, a fan can be used to dissipate heat. The fan is installed on the top of the aluminum-plastic panel on the back of the large screen and made into blinds so that rain does not enter the display when it rains. If it is a double-pillar LED display, you can open several blinds in the middle of the double-pillar. This Baiye window is the air inlet, and the fan above is the air outlet, so that complete air convection is formed and the heat dissipation effect is better.
Full-color LED display manufacturers say that the industry is not easy to do, in fact, there are many aspects, but the most critical point is the confusion of market prices.
The larger manufacturers are those listed companies, and their energy is devoted to making some small-pitch LED display products. For one thing, the small-pitch products raise the barriers to entry. If you want to produce small-pitch LED displays, then It is necessary to have the material conditions for the production of small spacing. First of all, technically this condition, and the technology also needs the support of machinery and equipment. Some small manufacturers are trapped in not having much capital to purchase equipment, and the profit of small-pitch products can be profitable. To reach the height reached by ordinary products, this is their profit growth point. Some large listed companies will share this cup of pie, and there is not much time to make conventional products.
In addition, some midstream manufacturers have higher prices, but they are relatively low and not much lower than those of listed companies. Some midstream manufacturers have inventory. Listed companies can advance funds to do some projects, but these companies can’t do it. Now that labor costs are rising year by year, some midstream companies have a very difficult time. The increase in raw material costs (the price of raw materials purchased by the month is about 3-5 points higher than the price of raw materials purchased in cash) This has led to the middle and upper reaches of the LED display. The development of the enterprise encounters big problems. If the suppliers come to ask for money together, they will go bankrupt without too much money to advance. Only by raising the price of the product to increase the profit brought by the display product To maintain the difficult development of the enterprise, the price of such a manufacturer is higher.
There are also some manufacturers that specialize in wholesale. Wholesale may be equal to the price. No business man in this society can truly tell you from the heart that I sell this thing to you, and I don’t make a penny. I owe it to you, as long as a businessman tells it to anyone, no one will believe it. The raw materials they use can tell you here, but they only do wholesale and will not care about your after-sales service. Take the ph10 outdoor full-color screen as an example. LED lights are the key to large LED screens. In the cost of raw materials, they account for 50-60% of the cost. Which of the better lights in Shenzhen’s packaging factory has a relatively ordinary price. The price of the packaging factory is 300-800 yuan per square, and the driver IC is even more informative. Nowadays, the most popular in the market is to sell under the brand of a certain brand in Taiwan, but in fact the appearance is used. The same other unbranded ICs have the model of a certain Taiwanese brand written on them. This cost can also be saved. The article on the circuit board is probably the thickness of the wiring inside the circuit board. If the thickness does not meet the requirements, the screen will In the use process, the wires are interrupted. If there are fewer wires on a board, you can fly a few wires out and connect them outside. If there are more, the module is basically scrapped.
There is also the cable. You can take a closer look at all the manufacturers who do wholesale. They are basically copper-clad aluminum cables, and more aluminum cables. This kind of wire will heat up during use. If you don’t believe it, you can try it yourself. Click; there is also the cabinet. If you buy a small display, it doesn’t matter. If you buy a large-screen cabinet, it’s fine. Generally speaking, the thickness of the cabinet should be at least 1.2mm or 1.5mm. The industry uses a 0.8mm box, is it easy to deform? Think for yourself! The quality of the mask and the kit is the most direct thing is the mosaic of the mask, the deformation or even the crack of the kit. The quality of the glue does not have much impact on the price of the LED display. If you install the screen in a foreign project or close to a place with heavy humidity, you want to consider using steel for a mask screw. By the way, the market should not be obsessed with the LED light-emitting diodes of all-chips given by manufacturers, so I won’t say much here. Creuview insists on selecting stable brand materials, reliable product quality and stability to ensure long-term stable use by customers.
Light weight: the box size is 576*576mm, the weight of Creuview per square box is only about 24kg, and the single box weighs only about 6.8kg. A single person can carry it with one hand, and the rental led display screen can be used to build a stage to save installation time;
Thin box body: The box body is made of die-cast aluminum, with high strength, strong toughness, high precision, not easy to deform, and its thickness is only 80mm;
The led display body is flat: the surface flatness error is less than 0.2mm, and the picture is clear and delicate without burrs;
Fast disassembly and assembly: the box body is connected with a quick locking mechanism up and down, and the two handles can be turned 90 degrees to lock the two boxes. The installation of one box can be completed in 10s, and the installation accuracy is high. The box splicing and wiring connection are fast and reliable, which is beautiful and beautiful and can be quickly assembled and disassembled in the true sense.
Easy maintenance: modular design, easy installation and disassembly at any position of the assembled screen, and simple maintenance.
Strong compatibility: The new structure design meets the requirements of hoisting and stacking, and meets the requirements of indoor and outdoor. The cabinet is singular, compatible with multiple pitches, and compatible with indoor and outdoor modules.
High refresh and high gray: high gray and high refresh rate design, gray level 16 bit, refresh frequency>960Hz;
Low cost: Excellent heat dissipation design and heat dissipation performance, without external fans, air conditioners, etc., low noise; light weight of the cabinet, low installation costs; low power consumption of the cabinet, saving operating costs.
Judging from the market’s response in 2013, the application of high-definition indoor full-color LED display is mainly to replace indoor DLP, LCD, projection, etc. The application areas include conference video, security monitoring, command and dispatch center, etc. From the perspective of the entire indoor display industry, the sales of DLP, LCD, projection and small-pitch LED displays in 2013 were about 11 billion, and the indoor display market share in 2014 and 2015 could reach about 15 billion.
To enter the civilian market, LED TVs need to make further breakthroughs in some technologies and applications. First of all, the problem of the display screen, the current display point of LCD TVs can achieve 0.58, even smaller and 0.4, 0.3. If LEDs are used instead, further breakthroughs in the upstream technology of the display LED industry chain are needed; secondly, application companies are required Further in-depth research and development will be carried out to combine the panel and the cabinet more effectively; in addition, can the combination of the PCB board and the LED panel be separated? If the LED TV fails, only a simple module replacement is required by the maintenance personnel. These are issues that application companies need to make further breakthroughs in the R&D process; again, further reduce prices and gain wider market acceptance. It is worth pointing out that the current comfort problem for direct viewing of LED TVs with human eyes has been solved, which is mainly manifested in the technical indicators of low brightness and high grayscale.
However, it is worth mentioning that LED displays have made initial breakthroughs in naked-eye 3D display effects. In the future, full-color LED displays will truly achieve high-definition displays. At the same time, with naked-eye 3D high-tech functions, it will be LED indoor One direction of the display’s value-added. The naked eye 3D LED display not only brings shocking display effects to the audience, but also realizes a healthy and comfortable naked eye vision 3D feast. Just imagine, when the audience take off the shackles of traditional 3D glasses and easily enjoy movie theaters and commercial advertisements in public places, the naked-eye 3D LED display will become the focus of the audience.
The asynchronous graphic control technology of LED electronic display means that the LED screen has the ability of storage and automatic playback. The edited text and non-gray-scale pictures on the PC are transmitted to the LED screen through the serial port or other network interface, and then the LED screen is offline. Automatic playback, generally does not have the ability to display multiple grayscales, mainly used to display text and simple graphic information, and can be connected to multiple screens. The main control PC transmits the information to be displayed and various control commands to the control board in the screen through serial communication. The control board in the screen contains a single-chip microcomputer and memory. The control board in the screen stores the information, and then displays it in accordance with the command. On the screen.
1. Due to the limitation of content storage space, most of the displayed content is mainly text, pictures, and characters.
2. Because the principle of the asynchronous system is to store the content to be displayed in the control system in advance, so as to avoid occupying the control computer. Can save costs.
3. It is mostly used for display screens with a small area that do not need to be changed frequently.
(2) Points for Attention in Asynchronous Graphic and Text Control Technology
1. Adapter: The host computer uses the serial port RS232 protocol to go online through the RS232-RS485 adapter, which is an optical isolation type.
2. Control panel: Receive the information to be displayed and various control commands transmitted by the PC through serial communication. The control panel contains a single-chip microcomputer and memory. The control panel in the screen stores the information, and then displays it on the screen according to the command. Features are as follows:
1. When the vertical dots are within 128, the horizontal dots can be up to 2000 dots. If the vertical is 16 points, the horizontal can reach 4000 points.
2. The large-capacity memory supports the first- and second-level Chinese fonts and a large number of proprietary fonts, and the storage capacity is 16 scenes.
3. It can be controlled by computer or displayed offline.
4. The information can be stored for 1 year after power failure.
5. With perpetual calendar real-time clock function.
(three) single network cable (four cores)
Using a four-wire system: a pair of differential twisted-pair wires receive, and the other pair of differential twisted-pair wires send. The communication distance is 1200 meters. It adopts a bus-type networking structure, with a maximum of 32 lower-level computers.
(four) host computer editing and broadcasting software
Communication screen LED program editing software, in line with LED graphic screen control protocol. It is suitable for editing and broadcasting text and image programs of multiple monochromatic or dual-primary color LED display screens of different lengths and different widths. Send 16 more programs each time.
(5) LED graphic screen control protocol
1. This protocol supports dot-matrix single-color, dual-color, graphic and text networked LED displays.
2. The networking form is bus type, the upper computer is a PC computer, and the lower computer is the single-chip microcomputer in the LED display control board. It adopts four-wire system, and the online protocol is RS485.
3. The host computer adopts the serial port RS232 protocol to go online through the adapter conversion.
4. Support TCP/IP protocol transmission.
Asynchronous system is mainly applied to the display screen with a small area and does not require the display content to be displayed synchronously with the control computer. Such as the dynamic display of various bar screens and small and medium-sized screens, various types of industry users (such as bank announcements, recruitment information releases, product information releases, etc.). Under normal circumstances, single-color or two-color display screens generally use asynchronous control systems.
Showa Denko Japan has developed LED chips that can reduce the “blue light” emitted by personal computers and smartphone screens by 95% compared to previous products. Blue light is thought to cause eye fatigue or sleep disturbance, so protective glasses that can prevent blue light from passing through are welcome. Showa Denko plans to realize the commercialization of new LED chips in 2014 and expand the demand for LCD screens and LED lighting.
LED lighting and LCD screens mainly use blue LEDs as light sources. The blue light emitted by the blue LED is considered to be the main reason that may cause the symptoms of dry eyes and difficulty falling asleep. Showa Denko combined LED chips in three colors of magenta, yellow and dark green to obtain basically the same effect as the blue LED light source. The brightness of the conventional magenta LED cannot be used as a light source for lighting, etc., but Showa Denko has improved the brightness through its own technology.
Since blue LEDs are not used, blue light can be reduced by more than 95%. It is said that although the price is relatively high, reaching 2 to 3 times that of blue LEDs, when used in products such as lighting and liquid crystal displays, the price of the product itself is expected to increase only by 20 to 30%.
Showa Denko has also been producing LED chips before, but not blue LEDs. The company hopes to use new LED chips as substitutes to explore market demand. It plans to use the existing facilities of the Chichibu Office in Chichibu City, Saitama Prefecture for production. In addition to LCD screens, it is also expected to be used for lighting in offices and desks.
The quality of display fire protection technology is mainly related to the fire protection raw materials and cabinet technology of the display. Fireproof raw materials mainly include the wires and power supply used inside the display screen, the fireproof materials of the external protective structure and the plastic kits: 4 aspects:
1.In most display applications, the larger the unit area of the display, the greater the power consumption, and the higher the requirements for the stability of the wire. Among many wire products, the use of wires that meet the requirements of the national standard can ensure their safety and stability. There are three requirements: the core is a copper wire conductive carrier, the cross-sectional area tolerance of the core is within the standard range, and the insulation of the rubber covering the core Compared with the general copper-clad aluminum wire core, the wire core with a smaller cross-sectional area and insufficient insulation rubber grade has more stable electrical performance and is less prone to short circuit;
2.UL-certified power supply products are also the choice when choosing similar products. Their effective conversion rate can ensure the safety and stability of the power load, and they can work normally in the hot external environment.
3.In terms of materials for the external protective structure of the display screen, most of the display products with a higher fire rating on the market are made of fireproof aluminum-plastic panels, which have excellent fire resistance, strong fire resistance and flame retardancy, and the core material has a very good oxygen aging performance. Strong, melting point temperature 135℃, decomposition temperature ≥300℃, environmental protection performance, low smoke and halogen free, in line with SGS, flame retardant B-S1, d0, t0, refer to the use standard UL94, GB/8624-2006. The aluminum-plastic panels of general outdoor display products age quickly with high temperature, rain, cold and heat impact, so that in the humid climate season, rain and dew will easily penetrate into the screen and cause short circuit of electronic components and cause fires.
4.There is another important part of the fireproof raw materials of the display screen, which is the plastic kit. The plastic kit is mainly the material used for the bottom shell of the unit module mask. The main raw material used is the flame-retardant PC+glass fiber material, which not only has the flame-retardant function. , It can be used in high and low temperature and long-term use without deformation, brittleness and cracking. At the same time, it can be used in combination with a better sealing glue to effectively prevent rainwater from the external environment from penetrating into the interior and causing short-circuit and fire.
5. In the absence of breakthroughs in the core materials such as lamp beads, the brightness cannot be increased by increasing the current.
In addition to the internal raw materials that will affect the fire protection effect, the external configuration and design are also very important, but the external configuration mainly involves heat dissipation in the fire protection problem. When the display is working, an exhaust fan and air conditioner will be configured to cool the interior of the screen. It is recommended to install a 1P air conditioner every 8-10 square meters to ensure that the temperature in the screen body is maintained at a normal constant temperature. Inadequate configuration of the air conditioner or exhaust fan will cause uneven heat dissipation, which may easily lead to hidden safety hazards inside the screen body due to temperature rise. At the same time, many LED companies simply simulate the spray waterproof test in the external environment when testing the protection level of the cabinet. The durability and strength of the waterproof effect need to be verified. The occurrence of water seepage is an important reason why outdoor display screens are prone to fire or have a short service life. When dealing with thunderstorms, the lightning arrester on the screen is also a tool to avoid the lightning strike and burn the internal components of the screen. It can directly lead the lightning into the ground without affecting the screen.
6. Install correctly
LED electronic displays are electronic products, and part of their main materials are also combustibles. Therefore, we must fundamentally start to “prevent problems from unburnt” and use high-quality power supplies, wires, ICs, and connection devices that are combustible. Devices, reduce the failure rate, and control the probability of fire in the led display; technically, the installation, guidance, and inspection of the led display must be carried out by professionals during the installation of the led display, which can prevent it beforehand; the flammable surrounding the led display Remove materials and combustibles to prevent the LED display from catching fire due to the surrounding fire hazards; in terms of after-sales maintenance, the LED display should be inspected and inspected regularly by professionals!
Price cut: helpless to continue. The price drop of LED display terminal products best reflects the helplessness of the industry. A company once said that the average price per square meter of LED full-color display products in 2009-2011 was 12,400, 12,000, and 10,700 respectively. , The average selling price in 2011 decreased by 13.71% compared to 2009. The company did not point out the price of its products in 2012 and 2013. In fact, according to the average selling price in the market, the price per square meter of LED full-color displays ranges from several thousand yuan. The price is publicly bid by the manufacturer. Depending on the material and process, taking outdoor P10 as an example, the price per square meter ranges from 4,000 to 10,000 yuan. If it is a wholesale indoor full-color display, the price is even lower. It can be seen that the continued decline in the price of LED display products in 2013 is a manifestation of industry competition, and this trend will continue.
Second, run off, in 2013, the living environment of LED display companies is not optimistic. Especially for small and medium-sized enterprises that do not have scale advantages and product advantages, it is even more difficult to find a balance in the cracks. As the price of LED displays is becoming more and more transparent, and the payment cycle is getting longer and longer, the company doing project engineering has to deal with the entanglement of customers, but also take responsibility for the supplier. Therefore, once bad debts or product problems are discovered, it may be possible As a result, the entire enterprise cannot be turned around, and finally it has to go bankrupt. Big Horizons, Haobo, Vision Light, Everlight, Shifang, and other billion-dollar enterprises are also unable to escape bad luck, and the impact of their bankruptcy is huge, leaving behind a lot of debts. In the end, innocent employees and suppliers are injured. NS.
Third, channels: continue to be hot. Channel competition has always been a must for LED lighting companies. However, in recent years, LED display manufacturers have also begun to be keen on expanding channels, mainly because display products have become more standardized and large-scale. Whoever can get the support of distributors across the country can cover the national market and expand its influence.
Fourth, expansion: non-stop. Some people say that the LED display industry market competition is so stimulating, how can anyone expand production? This statement is wrong. Not all companies are compressing their own business. On the contrary, the market downturn has eliminated some companies while also giving some companies opportunities. Chips have received many government preferential treatments or direct subsidies for their expansion. Some companies have also continued to expand their production due to industrial needs. The construction of industrial parks is ready for subsequent production. Of course, some manufacturers of wholesale display screens are also constantly expanding production. Although their profits are meager, their business seems to be getting bigger and bigger.
Fifth, subdivision: a common practice. When the argument that the LED display market is saturated began to circulate in the industry, many visionary companies have begun to focus on emerging market segments. The competition of display screens in the conventional field depends on the strength and price of the enterprise, but the more segmented market depends on the technical ability of the enterprise. At present, the LED display industry has gradually opened up some new growth highlights, such as high-density and small-pitch LED displays, and thus put forward the concept of LED super TV; such as outdoor surface-mounted LED displays, which will be outdoor direct-plug displays The future replacement device of the screen.
Sixth, integration: has become a trend. Integration includes horizontal integration and vertical integration. Enterprises can choose the way of integration according to their own development needs. Many companies separate marketing from the two major sectors of display and lighting at the same time, which is a kind of integration; Sanan Optoelectronics and National Star Optoelectronics, through equity participation or establishment of branch companies, spread their antennae throughout the upstream chip, midstream packaging and downstream application fields, which is also a kind of integration; Epistar in Taiwan, China, is using virtual vertical integration as a strategy to strengthen its export on the application side; more display companies are doing integration actions in the form of bundling or alliances with suppliers. In short, integration has become an unstoppable trend in the LED display industry, and it is also a direct contributor to the future market structure.
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Outdoor full-color LED display lightning protection treatment
/in News /by creuview1.Protection against direct lightning strikes: Install lightning rods on the support structure of the LED display (outdoor), indoor LED displays or LED displays with tall buildings next to them, you do not need to consider installing lightning rods.
2.For the counterattack of the steel structure, connect the rigid structure to the housing of the LED display screen, equipotentially, and ground. The grounding resistance is generally required to be less than 10 ohms. If the resistance does not meet the requirements, additional The artificial grounding grid. The lightning arrester should also be well grounded.
3. For the lightning current induced on the power line, install a single-phase or three-phase power surge protector on the power line. The cross-sectional area of the link wire of the phase wire cannot be less than 10mm square, and the cross-sectional area of the ground wire can not be less than 16mm square.
4.For the lightning current induced on the signal line, install a signal lightning protection device on the signal line. The signal lightning arrester is determined according to the signal interface of the system. If it is a network cable, install a network signal lightning protection device, and install a DB9 interface lightning protection device for the serial interface. The cross-sectional area of the ground wire cannot be less than 1.5mm square.
5.For the induced current of lightning strikes, a unified dedicated professional distribution box and power distribution cabinet can more comprehensively and effectively protect the entire circuit system from the interference of the lightning induced current.
Outdoor full-color LED display heat dissipation treatment
/in News /by creuviewNO. one, LED display within 20 square meters
Generally, no air conditioner can be used. If conditions permit, two fans with a diameter of about 500mm can be used, depending on the size of the installation space.
NO. Two, LED display screen with more than 20 square meter
1.If the LED display is installed against the wall and can protrude by one meter from the wall, it is recommended to choose the fan according to the area, and the fan should be installed in sequence above the side of the screen. If you buy an outdoor full-color LED screen with a ph16 of 80 square meters, it means that the fan you buy requires 6 axial fans with a diameter of about 600 mm. Make sure that there is a net inside to prevent the technician repairing the display from sucking in clothes and other things when repairing the display to prevent personal injury. For waterproofing, install the air outlet of the fan on the outside aluminum-plastic panel Aluminum shutters. The wall-mounted LED display screen can also be installed with air conditioners. Ensure that there is enough space for the air conditioner host without affecting the overall appearance of the wall. The choice of air conditioner is required. Generally, 1.5P, 2P and 3P air conditioners are used the most. Northern cities use 12 square meters of 1P air-conditioning calculations; southern cities use 9 square meters of 1P air-conditioning calculations. If the area of the LED outdoor display is relatively large, the air conditioner needs to be customized; if the area is not large, you can buy it at a specialty store, but you need to buy a display cooling air conditioner with call compensation function.
2.If the LED display is installed on a column, a fan can be used to dissipate heat. The fan is installed on the top of the aluminum-plastic panel on the back of the large screen and made into blinds so that rain does not enter the display when it rains. If it is a double-pillar LED display, you can open several blinds in the middle of the double-pillar. This Baiye window is the air inlet, and the fan above is the air outlet, so that complete air convection is formed and the heat dissipation effect is better.
Chaos in competition among full-color LED display manufacturers
/in News /by creuviewFull-color LED display manufacturers say that the industry is not easy to do, in fact, there are many aspects, but the most critical point is the confusion of market prices.
The larger manufacturers are those listed companies, and their energy is devoted to making some small-pitch LED display products. For one thing, the small-pitch products raise the barriers to entry. If you want to produce small-pitch LED displays, then It is necessary to have the material conditions for the production of small spacing. First of all, technically this condition, and the technology also needs the support of machinery and equipment. Some small manufacturers are trapped in not having much capital to purchase equipment, and the profit of small-pitch products can be profitable. To reach the height reached by ordinary products, this is their profit growth point. Some large listed companies will share this cup of pie, and there is not much time to make conventional products.
In addition, some midstream manufacturers have higher prices, but they are relatively low and not much lower than those of listed companies. Some midstream manufacturers have inventory. Listed companies can advance funds to do some projects, but these companies can’t do it. Now that labor costs are rising year by year, some midstream companies have a very difficult time. The increase in raw material costs (the price of raw materials purchased by the month is about 3-5 points higher than the price of raw materials purchased in cash) This has led to the middle and upper reaches of the LED display. The development of the enterprise encounters big problems. If the suppliers come to ask for money together, they will go bankrupt without too much money to advance. Only by raising the price of the product to increase the profit brought by the display product To maintain the difficult development of the enterprise, the price of such a manufacturer is higher.
There are also some manufacturers that specialize in wholesale. Wholesale may be equal to the price. No business man in this society can truly tell you from the heart that I sell this thing to you, and I don’t make a penny. I owe it to you, as long as a businessman tells it to anyone, no one will believe it. The raw materials they use can tell you here, but they only do wholesale and will not care about your after-sales service. Take the ph10 outdoor full-color screen as an example. LED lights are the key to large LED screens. In the cost of raw materials, they account for 50-60% of the cost. Which of the better lights in Shenzhen’s packaging factory has a relatively ordinary price. The price of the packaging factory is 300-800 yuan per square, and the driver IC is even more informative. Nowadays, the most popular in the market is to sell under the brand of a certain brand in Taiwan, but in fact the appearance is used. The same other unbranded ICs have the model of a certain Taiwanese brand written on them. This cost can also be saved. The article on the circuit board is probably the thickness of the wiring inside the circuit board. If the thickness does not meet the requirements, the screen will In the use process, the wires are interrupted. If there are fewer wires on a board, you can fly a few wires out and connect them outside. If there are more, the module is basically scrapped.
There is also the cable. You can take a closer look at all the manufacturers who do wholesale. They are basically copper-clad aluminum cables, and more aluminum cables. This kind of wire will heat up during use. If you don’t believe it, you can try it yourself. Click; there is also the cabinet. If you buy a small display, it doesn’t matter. If you buy a large-screen cabinet, it’s fine. Generally speaking, the thickness of the cabinet should be at least 1.2mm or 1.5mm. The industry uses a 0.8mm box, is it easy to deform? Think for yourself! The quality of the mask and the kit is the most direct thing is the mosaic of the mask, the deformation or even the crack of the kit. The quality of the glue does not have much impact on the price of the LED display. If you install the screen in a foreign project or close to a place with heavy humidity, you want to consider using steel for a mask screw. By the way, the market should not be obsessed with the LED light-emitting diodes of all-chips given by manufacturers, so I won’t say much here. Creuview insists on selecting stable brand materials, reliable product quality and stability to ensure long-term stable use by customers.
Features of stage rental led display box
/in News /by creuviewLight weight: the box size is 576*576mm, the weight of Creuview per square box is only about 24kg, and the single box weighs only about 6.8kg. A single person can carry it with one hand, and the rental led display screen can be used to build a stage to save installation time;
Thin box body: The box body is made of die-cast aluminum, with high strength, strong toughness, high precision, not easy to deform, and its thickness is only 80mm;
The led display body is flat: the surface flatness error is less than 0.2mm, and the picture is clear and delicate without burrs;
Fast disassembly and assembly: the box body is connected with a quick locking mechanism up and down, and the two handles can be turned 90 degrees to lock the two boxes. The installation of one box can be completed in 10s, and the installation accuracy is high. The box splicing and wiring connection are fast and reliable, which is beautiful and beautiful and can be quickly assembled and disassembled in the true sense.
Easy maintenance: modular design, easy installation and disassembly at any position of the assembled screen, and simple maintenance.
Strong compatibility: The new structure design meets the requirements of hoisting and stacking, and meets the requirements of indoor and outdoor. The cabinet is singular, compatible with multiple pitches, and compatible with indoor and outdoor modules.
High refresh and high gray: high gray and high refresh rate design, gray level 16 bit, refresh frequency>960Hz;
Low cost: Excellent heat dissipation design and heat dissipation performance, without external fans, air conditioners, etc., low noise; light weight of the cabinet, low installation costs; low power consumption of the cabinet, saving operating costs.
Full-color LED display 3D technology accelerates to seize the share of LCD screens
/in News /by creuviewJudging from the market’s response in 2013, the application of high-definition indoor full-color LED display is mainly to replace indoor DLP, LCD, projection, etc. The application areas include conference video, security monitoring, command and dispatch center, etc. From the perspective of the entire indoor display industry, the sales of DLP, LCD, projection and small-pitch LED displays in 2013 were about 11 billion, and the indoor display market share in 2014 and 2015 could reach about 15 billion.
To enter the civilian market, LED TVs need to make further breakthroughs in some technologies and applications. First of all, the problem of the display screen, the current display point of LCD TVs can achieve 0.58, even smaller and 0.4, 0.3. If LEDs are used instead, further breakthroughs in the upstream technology of the display LED industry chain are needed; secondly, application companies are required Further in-depth research and development will be carried out to combine the panel and the cabinet more effectively; in addition, can the combination of the PCB board and the LED panel be separated? If the LED TV fails, only a simple module replacement is required by the maintenance personnel. These are issues that application companies need to make further breakthroughs in the R&D process; again, further reduce prices and gain wider market acceptance. It is worth pointing out that the current comfort problem for direct viewing of LED TVs with human eyes has been solved, which is mainly manifested in the technical indicators of low brightness and high grayscale.
However, it is worth mentioning that LED displays have made initial breakthroughs in naked-eye 3D display effects. In the future, full-color LED displays will truly achieve high-definition displays. At the same time, with naked-eye 3D high-tech functions, it will be LED indoor One direction of the display’s value-added. The naked eye 3D LED display not only brings shocking display effects to the audience, but also realizes a healthy and comfortable naked eye vision 3D feast. Just imagine, when the audience take off the shackles of traditional 3D glasses and easily enjoy movie theaters and commercial advertisements in public places, the naked-eye 3D LED display will become the focus of the audience.
Asynchronous control scheme and characteristics of led electronic display
/in News /by creuviewThe asynchronous graphic control technology of LED electronic display means that the LED screen has the ability of storage and automatic playback. The edited text and non-gray-scale pictures on the PC are transmitted to the LED screen through the serial port or other network interface, and then the LED screen is offline. Automatic playback, generally does not have the ability to display multiple grayscales, mainly used to display text and simple graphic information, and can be connected to multiple screens. The main control PC transmits the information to be displayed and various control commands to the control board in the screen through serial communication. The control board in the screen contains a single-chip microcomputer and memory. The control board in the screen stores the information, and then displays it in accordance with the command. On the screen.
(1) Main features of asynchronous system
1. Due to the limitation of content storage space, most of the displayed content is mainly text, pictures, and characters.
2. Because the principle of the asynchronous system is to store the content to be displayed in the control system in advance, so as to avoid occupying the control computer. Can save costs.
3. It is mostly used for display screens with a small area that do not need to be changed frequently.
(2) Points for Attention in Asynchronous Graphic and Text Control Technology
1. Adapter: The host computer uses the serial port RS232 protocol to go online through the RS232-RS485 adapter, which is an optical isolation type.
2. Control panel: Receive the information to be displayed and various control commands transmitted by the PC through serial communication. The control panel contains a single-chip microcomputer and memory. The control panel in the screen stores the information, and then displays it on the screen according to the command. Features are as follows:
1. When the vertical dots are within 128, the horizontal dots can be up to 2000 dots. If the vertical is 16 points, the horizontal can reach 4000 points.
2. The large-capacity memory supports the first- and second-level Chinese fonts and a large number of proprietary fonts, and the storage capacity is 16 scenes.
3. It can be controlled by computer or displayed offline.
4. The information can be stored for 1 year after power failure.
5. With perpetual calendar real-time clock function.
(three) single network cable (four cores)
Using a four-wire system: a pair of differential twisted-pair wires receive, and the other pair of differential twisted-pair wires send. The communication distance is 1200 meters. It adopts a bus-type networking structure, with a maximum of 32 lower-level computers.
(four) host computer editing and broadcasting software
Communication screen LED program editing software, in line with LED graphic screen control protocol. It is suitable for editing and broadcasting text and image programs of multiple monochromatic or dual-primary color LED display screens of different lengths and different widths. Send 16 more programs each time.
(5) LED graphic screen control protocol
1. This protocol supports dot-matrix single-color, dual-color, graphic and text networked LED displays.
2. The networking form is bus type, the upper computer is a PC computer, and the lower computer is the single-chip microcomputer in the LED display control board. It adopts four-wire system, and the online protocol is RS485.
3. The host computer adopts the serial port RS232 protocol to go online through the adapter conversion.
4. Support TCP/IP protocol transmission.
Asynchronous system is mainly applied to the display screen with a small area and does not require the display content to be displayed synchronously with the control computer. Such as the dynamic display of various bar screens and small and medium-sized screens, various types of industry users (such as bank announcements, recruitment information releases, product information releases, etc.). Under normal circumstances, single-color or two-color display screens generally use asynchronous control systems.
LED display? New breakthroughs in research on “blue light” damage to the eyes of LED chips
/in News /by creuviewShowa Denko Japan has developed LED chips that can reduce the “blue light” emitted by personal computers and smartphone screens by 95% compared to previous products. Blue light is thought to cause eye fatigue or sleep disturbance, so protective glasses that can prevent blue light from passing through are welcome. Showa Denko plans to realize the commercialization of new LED chips in 2014 and expand the demand for LCD screens and LED lighting.
LED lighting and LCD screens mainly use blue LEDs as light sources. The blue light emitted by the blue LED is considered to be the main reason that may cause the symptoms of dry eyes and difficulty falling asleep.
Showa Denko combined LED chips in three colors of magenta, yellow and dark green to obtain basically the same effect as the blue LED light source. The brightness of the conventional magenta LED cannot be used as a light source for lighting, etc., but Showa Denko has improved the brightness through its own technology.
Since blue LEDs are not used, blue light can be reduced by more than 95%. It is said that although the price is relatively high, reaching 2 to 3 times that of blue LEDs, when used in products such as lighting and liquid crystal displays, the price of the product itself is expected to increase only by 20 to 30%.
Showa Denko has also been producing LED chips before, but not blue LEDs. The company hopes to use new LED chips as substitutes to explore market demand. It plans to use the existing facilities of the Chichibu Office in Chichibu City, Saitama Prefecture for production. In addition to LCD screens, it is also expected to be used for lighting in offices and desks.
How to do a good job of fire prevention for LED display?
/in News /by creuviewThe quality of display fire protection technology is mainly related to the fire protection raw materials and cabinet technology of the display. Fireproof raw materials mainly include the wires and power supply used inside the display screen, the fireproof materials of the external protective structure and the plastic kits: 4 aspects:
1.In most display applications, the larger the unit area of the display, the greater the power consumption, and the higher the requirements for the stability of the wire. Among many wire products, the use of wires that meet the requirements of the national standard can ensure their safety and stability. There are three requirements: the core is a copper wire conductive carrier, the cross-sectional area tolerance of the core is within the standard range, and the insulation of the rubber covering the core Compared with the general copper-clad aluminum wire core, the wire core with a smaller cross-sectional area and insufficient insulation rubber grade has more stable electrical performance and is less prone to short circuit;
2.UL-certified power supply products are also the choice when choosing similar products. Their effective conversion rate can ensure the safety and stability of the power load, and they can work normally in the hot external environment.
3.In terms of materials for the external protective structure of the display screen, most of the display products with a higher fire rating on the market are made of fireproof aluminum-plastic panels, which have excellent fire resistance, strong fire resistance and flame retardancy, and the core material has a very good oxygen aging performance. Strong, melting point temperature 135℃, decomposition temperature ≥300℃, environmental protection performance, low smoke and halogen free, in line with SGS, flame retardant B-S1, d0, t0, refer to the use standard UL94, GB/8624-2006. The aluminum-plastic panels of general outdoor display products age quickly with high temperature, rain, cold and heat impact, so that in the humid climate season, rain and dew will easily penetrate into the screen and cause short circuit of electronic components and cause fires.
4.There is another important part of the fireproof raw materials of the display screen, which is the plastic kit. The plastic kit is mainly the material used for the bottom shell of the unit module mask. The main raw material used is the flame-retardant PC+glass fiber material, which not only has the flame-retardant function. , It can be used in high and low temperature and long-term use without deformation, brittleness and cracking. At the same time, it can be used in combination with a better sealing glue to effectively prevent rainwater from the external environment from penetrating into the interior and causing short-circuit and fire.
5. In the absence of breakthroughs in the core materials such as lamp beads, the brightness cannot be increased by increasing the current.
In addition to the internal raw materials that will affect the fire protection effect, the external configuration and design are also very important, but the external configuration mainly involves heat dissipation in the fire protection problem. When the display is working, an exhaust fan and air conditioner will be configured to cool the interior of the screen. It is recommended to install a 1P air conditioner every 8-10 square meters to ensure that the temperature in the screen body is maintained at a normal constant temperature. Inadequate configuration of the air conditioner or exhaust fan will cause uneven heat dissipation, which may easily lead to hidden safety hazards inside the screen body due to temperature rise. At the same time, many LED companies simply simulate the spray waterproof test in the external environment when testing the protection level of the cabinet. The durability and strength of the waterproof effect need to be verified. The occurrence of water seepage is an important reason why outdoor display screens are prone to fire or have a short service life. When dealing with thunderstorms, the lightning arrester on the screen is also a tool to avoid the lightning strike and burn the internal components of the screen. It can directly lead the lightning into the ground without affecting the screen.
6. Install correctly
LED electronic displays are electronic products, and part of their main materials are also combustibles. Therefore, we must fundamentally start to “prevent problems from unburnt” and use high-quality power supplies, wires, ICs, and connection devices that are combustible. Devices, reduce the failure rate, and control the probability of fire in the led display; technically, the installation, guidance, and inspection of the led display must be carried out by professionals during the installation of the led display, which can prevent it beforehand; the flammable surrounding the led display Remove materials and combustibles to prevent the LED display from catching fire due to the surrounding fire hazards; in terms of after-sales maintenance, the LED display should be inspected and inspected regularly by professionals!
Several major characteristics of the LED display market in the Year of the Ox
/in News /by creuviewPrice cut: helpless to continue. The price drop of LED display terminal products best reflects the helplessness of the industry. A company once said that the average price per square meter of LED full-color display products in 2009-2011 was 12,400, 12,000, and 10,700 respectively. , The average selling price in 2011 decreased by 13.71% compared to 2009. The company did not point out the price of its products in 2012 and 2013. In fact, according to the average selling price in the market, the price per square meter of LED full-color displays ranges from several thousand yuan. The price is publicly bid by the manufacturer. Depending on the material and process, taking outdoor P10 as an example, the price per square meter ranges from 4,000 to 10,000 yuan. If it is a wholesale indoor full-color display, the price is even lower. It can be seen that the continued decline in the price of LED display products in 2013 is a manifestation of industry competition, and this trend will continue.
Second, run off, in 2013, the living environment of LED display companies is not optimistic. Especially for small and medium-sized enterprises that do not have scale advantages and product advantages, it is even more difficult to find a balance in the cracks. As the price of LED displays is becoming more and more transparent, and the payment cycle is getting longer and longer, the company doing project engineering has to deal with the entanglement of customers, but also take responsibility for the supplier. Therefore, once bad debts or product problems are discovered, it may be possible As a result, the entire enterprise cannot be turned around, and finally it has to go bankrupt. Big Horizons, Haobo, Vision Light, Everlight, Shifang, and other billion-dollar enterprises are also unable to escape bad luck, and the impact of their bankruptcy is huge, leaving behind a lot of debts. In the end, innocent employees and suppliers are injured. NS.
Third, channels: continue to be hot. Channel competition has always been a must for LED lighting companies. However, in recent years, LED display manufacturers have also begun to be keen on expanding channels, mainly because display products have become more standardized and large-scale. Whoever can get the support of distributors across the country can cover the national market and expand its influence.
Fourth, expansion: non-stop. Some people say that the LED display industry market competition is so stimulating, how can anyone expand production? This statement is wrong. Not all companies are compressing their own business. On the contrary, the market downturn has eliminated some companies while also giving some companies opportunities. Chips have received many government preferential treatments or direct subsidies for their expansion. Some companies have also continued to expand their production due to industrial needs. The construction of industrial parks is ready for subsequent production. Of course, some manufacturers of wholesale display screens are also constantly expanding production. Although their profits are meager, their business seems to be getting bigger and bigger.
Fifth, subdivision: a common practice. When the argument that the LED display market is saturated began to circulate in the industry, many visionary companies have begun to focus on emerging market segments. The competition of display screens in the conventional field depends on the strength and price of the enterprise, but the more segmented market depends on the technical ability of the enterprise. At present, the LED display industry has gradually opened up some new growth highlights, such as high-density and small-pitch LED displays, and thus put forward the concept of LED super TV; such as outdoor surface-mounted LED displays, which will be outdoor direct-plug displays The future replacement device of the screen.
Sixth, integration: has become a trend. Integration includes horizontal integration and vertical integration. Enterprises can choose the way of integration according to their own development needs. Many companies separate marketing from the two major sectors of display and lighting at the same time, which is a kind of integration; Sanan Optoelectronics and National Star Optoelectronics, through equity participation or establishment of branch companies, spread their antennae throughout the upstream chip, midstream packaging and downstream application fields, which is also a kind of integration; Epistar in Taiwan, China, is using virtual vertical integration as a strategy to strengthen its export on the application side; more display companies are doing integration actions in the form of bundling or alliances with suppliers. In short, integration has become an unstoppable trend in the LED display industry, and it is also a direct contributor to the future market structure.