How to Distinguish the Protection Grade of LED Display Screen

The protection level system is drafted by IEC. The full-color LED display screen shall be graded according to its characteristics of dust prevention, prevention of foreign invasion, waterproof and moisture prevention. The foreign objects mentioned here, including tools and human fingers, shall not touch the live part in the lamp to avoid electric shock.IP protection level is composed of two numbers. The first number represents the level of dust prevention and foreign invasion of full-color LED display screen; The second number indicates the tightness of the full-color LED display screen against moisture and water intrusion. The larger the number, the higher the degree of protection. Dustproof grade (indicated by the first x) and waterproof grade (indicated by the second x).The first X represents the meaning of the digital code

How to Distinguish the Protection Grade of LED Display Screen 1

0: no protection1: Prevent large solid intrusion2: Prevent the intrusion of medium-sized solids

3: Prevent small solids from entering4: Prevent solid objects larger than 1mm from entering5: Prevent harmful dust accumulation

6: Completely prevent dust from enteringThe second X represents the meaning of the digital code0: no protection

1: Water drops into the shell have no effect2: When the housing is tilted to 15 degrees, the water drops into the housing have no effect3: Water or rain has no effect from the 60 degree corner to the shell

How to Distinguish the Protection Grade of LED Display Screen 2

4: The liquid splashed on the shell from any direction has no harmful effect5: Rinse with water without any harm6: It can be used in the cabin environment

7: It can withstand immersion in a short time (1m)8: Immerse in water for a long time under a certain pressureFor example, a full-color LED display is marked as IP65, indicating that the product can completely prevent dust from entering and can be washed with water without any harm. The full-color LED display screen usually made by our company belongs to the title screen body, and the protection grade is IP65. It can be washed by rainwater under certain pressure and work stably and continuously.

Source: Huicong LED screen

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How to Ensure the Information Security of LED Display Screen
How to Ensure the Information Security of LED Display Screen
As an important way of media carrier, LED display screen is more and more recognized by the market. In order to provide better services, display manufacturers constantly upgrade and optimize the operating system, making it more and more convenient and more "fool type". However, we ignore the security behind the screen login operation. At present, with the in-depth development of smart city construction, LED displays are becoming more and more intelligent and integrated with the Internet. Many networked large screens can realize remote control as long as there is a network, which not only brings convenience to large screen managers, but also leaves a "gap" for criminals. How to protect the information security of LED display? We need to comprehensively strengthen personnel management and training, control system defense mechanism and so on. Professionals do professional things In terms of management training, the display screen owner must carry out professional training for the direct management personnel. Whether it is operation mode, basic maintenance or work ethics, they must go to work after strict assessment, and regularly carry out relevant training for the management personnel to help them improve the business level and large screen safety awareness of the administrator. At the same time, it is also necessary to arrange special safety inspectors to conduct timely picketing, so as to correct errors in time. In addition, the most important thing is to build an emergency plan to judge whether the system is running normally or attacked, review sensitive content, and judge and warn in a short time. Control system optimization defense As we all know, for the LED display screen, the control system dominates the display screen, and the optimization of the [Defense] performance of the control system can help the display screen resist the attack of undead molecules. In view of the frequent display information security problems, the control system manufacturers in the industry are also continuously optimizing their products and technologies. Recently, the leading control system manufacturer in the industry has launched the security device lock function in the single machine control mode of LED display screen. Users can customize the device lock password, which enhances the security of the content and parameters of LED display screen. Even if the LED display screen is connected without knowing the device lock password, it is impossible to change the parameters and contents of the display screen. LED display screen playing false information and reactionary superstition and other illegal information has become a risk that can not be ignored in the media operation process of LED display screen. Safe playing has also become a rigid demand of advertising operators. Although in the Internet era, the problem of information security is impossible to prevent, we can continue to strengthen the product safety factor through system manufacturers, strengthen the professional quality of operators, focus on release to reduce misoperation, strengthen enterprises' awareness of network information security of LED display screen, and create a healthy and green LED display screen communication environment.I have AT&T and my phone is messed up right now. I'm not able to see anything on my display screen./?nope there is no way..they do not track...this happend to me last year...take out the battery and there should be a little round sticker and if it is still white there is no water damage and u should be able to call into customer service and get a new, FREE, phone...at least that is what they did with me and the rest of the fam...cuz it happend to everyone with the same phone. .....try to switch to a different carrier, as far as i know none of them have the option to see your texts online but AT&T sucks now a days, service sucks and so do the phones well at least all of the phones that i hadwhat graphics card do i need for diablo 3?A graphics card, also known as a video card, is a piece of hardware installed in a computer that is responsible for rendering the image on the computer's monitor or display screen. Graphics cards come in many varieties with varying features that allow for a price range that extends from about $20 US Dollars (USD) to $2,400 USD or more. Recommended System Requirements (Video card): Windows: NVIDIA GeForce 260 or ATI Radeon HD 4870 or better mac: NVIDIA GeForce GT 330M or ATI Radeon HD 4670 or better Hope this helps.
How to Solve the Pixel Out of Control of LED Display Screen
How to Solve the Pixel Out of Control of LED Display Screen
Pixel out of control of full-color LED display screen is a common problem. What is the reason for this phenomenon and how to solve it?The pixel point of LED display screen is out of control, which means that the smallest imaging unit (pixel) of the display screen is not working normally. The ratio of out of control pixels to the total number of pixels on the whole screen is called "out of control rate of pixels on the whole screen". There are two modes of pixel out of control. One is blind spot, that is, blind spot. When it needs to be bright, it is not bright, which is called blind spot; The second is the constant bright spot. When it needs not to be bright, it is always bright, which is called the constant bright spot.Generally, the common pixels of LED display screen are 2R1G1B (two red lights, one green light and one blue light, the same below) and 1R1G1B. Generally, out of control will not mean that all the red, green and blue lights in the same pixel are out of control at the same time, but as long as one of the lights is out of control, we think that this pixel is out of control. Therefore, it can be concluded that the main reason for the out of control of pixels of full-color LED display screen is the out of control of LED lights. The main causes of LED lamp failure can be divided into two aspects: first, the poor quality of LED itself; The second is the improper use of methods.The LED lamp out of control cannot be found in the routine inspection and test of LED. Under bad conditions such as high temperature, low temperature and rapid temperature change, due to the difference of thermal expansion coefficient of LED chip, epoxy resin, support, inner lead, solid crystal adhesive, PPA cup and other materials, it is caused by the difference of internal stress. The mechanism of led out of control caused by electrostatic discharge is very complex. Equipment, tools, utensils and human body may carry static electricity and discharge it. This static electricity is as low as hundreds of volts, as high as tens of thousands of volts, and the discharge time is at the nanosecond level. If the blue-green tube is out of control, it is often caused by the electric breakdown of the led-pn junction by electrostatic discharge. Due to the complex production process of LED display screen, electrostatic discharge prevention is impossible. Therefore, electrostatic protection must run through the whole production process.In different occasions, the actual requirements of pixel out of control rate are different, and the index of full-color LED display screen is required to be controlled within 1%; The indicators of monochrome LED display screen shall be controlled within one tenth. At present, there is no good solution for the pixels of full-color LED display. It is recommended to contact the service manufacturer to return to the factory for maintenance. If the maintenance cost is too high, consider replacing the faulty module unit board.At present, domestic LED displays are subject to aging test before leaving the factory, and the LED lights of out of control pixels are repaired and replaced. It is no problem to control the "out of control rate of whole screen pixels" within 1 / 104 and the "out of control rate of regional pixels" within 3 / 104. Even the enterprise standards of individual manufacturers require that out of control pixels are not allowed before leaving the factory, However, this is bound to increase the manufacturing and maintenance costs of manufacturers and prolong the delivery time.In different applications, the actual requirements of pixel out of control rate can vary greatly. Generally speaking, LED display screen is used for video playback, and the index requirement is acceptable and achievable within 1 / 104; If it is used for simple character information release, it is reasonable to control the index within 12 / 104.
Alto Electronics Took the Lead in Releasing HDR Display Technology Based on LED Display Screen
Alto Electronics Took the Lead in Releasing HDR Display Technology Based on LED Display Screen
Since this year, HDR technology has been frequently mentioned by people in the industry. Alto electronics, as a well-known LED display enterprise with a development history of more than 20 years, is the first to release HDR display technology based on LED display. Adhering to the principle of paying attention to cutting-edge technologies, keeping up with the latest development trend of the industry and promoting industrial upgrading, the reporter of LED screen display world recently interviewed Alto electronics. The following are some wonderful interviews.LED screen display world: because HDR function can significantly improve the color effect of display equipment, HDR has been widely used in the field of television, but in our LED display industry, the application of HDR technology is just in its infancy. Could you please introduce the technical principle of HDR in detail? What products do you support HDR?Alto Electronics: the purpose of HDR technology is to more truly restore nature, what you see is what you get. For the display side, it is mainly realized from three dimensions.1. Wider color gamut: CIE1931 is the color gamut range that human eyes can feel, while the traditional LCD TV intelligence reaches 72% NTSC. It only covers 35.9% of the HDR standard bt2020 color gamut. Bt2020 covers 75.8% of CIE1931, which is closer and closer to the color gamut range that human eyes can perceive. Of course, the current display technology has not really reached the bt2020 color gamut, and Alto has greatly improved the color gamut of LED display screen through correction technology and color gamut conversion algorithm, reaching 110% NTSC, which is as close to the bt2020 color gamut as possible.CLD series2. Higher contrast: the contrast that human eyes can recognize at the same time can reach more than 100000:1, while the contrast of traditional LCD is only about 1000:1. For LED display, it is necessary to increase the maximum brightness and reduce the minimum brightness. Alto improves the brightness of the display screen through common cathode technology. At the same time, it reduces the minimum brightness by reducing the LED chip size (Mini LED technology) and patented module lamp technology to achieve higher contrast (the contrast is close to 10000:1).3. Higher dynamic range: in the digital display, even the 10bit color depth input is only represented by 1024 gray levels. There is still a lot of brightness in the brightness range of 1000 nit, and the color cannot be expressed. Moreover, the brightness difference that human eyes can distinguish under different brightness is not linear, but conforms to the curve of Weber's Law (that is, the lower the brightness, the smaller the brightness difference that can be distinguished, and the greater the brightness, the larger the brightness difference that can be distinguished). In order to comply with such a law, it is necessary to improve the dynamic range and distribute more gray levels to low brightness areas. This requires changing the input-output conversion curve. Hdr10 is based on PQ conversion curve and HLG is based on HLG conversion curve. At present, alto's LED display supports both curves. In order to better improve the dynamic range, the LED display system independently developed by Alto to dynamically adjust the background brightness and conversion curve of the display screen under different brightness scene frames has passed the laboratory test. Through such a technology, alto LED display system will better support hdr10 and Dolby HDR.Alto electronics provides a complete LED display HDR solution from content playback to video processing of LED control system, wide color gamut correction algorithm to high dynamic LED display.Alto products currently supporting HDR include:1. A new generation of LED control system independently developed: atlvc-2k, atlvc-4k and atlvc-8k.2. LED display products: the whole series of small spacing products are supported.LED display world: as a new technology, how much does HDR technology help to improve the image quality of our LED display? What impact do you think HDR technology will bring to the development of our LED display?Alto Electronics: alto electronics took the lead in releasing HDR display technology based on LED display at ise in the Netherlands in early 2016. Subsequently, alto enterprise standard on HDR technology was formulated in the second half of 2016. It was applied to the international famous auto show by the international famous led leasing company at the end of 2016. It provides more bright and dark details for automobile display, and the picture is fuller and the color transition is smoother, which has attracted great attention of automobile enterprises. With the support of HDR technology, it is bound to cause the in-depth development of small spacing LED display in high-end application fields such as radio and television, auto show, industrial design, advertising, film broadcasting and so on.LED screen display world: if HDR technology wants to be widely used in LED display industry, what difficulties still need to be solved? Compared with LCD, projection and other display technologies, what are the advantages of our LED display in the application of HDR technology? What are the shortcomings?Alto Electronics: HDR technology wants to be widely used in LED display. At present, the most important thing is to solve the HDR standard problem of LED display. This includes input source standards, color gamut standards, brightness standards, etc. as early as the second half of 2016, alto formulated the LED display enterprise standard of HDR. At present, many manufacturers claim to support HDR technology, but the actual display effect is uneven.Compared with projection LCD, LED display has the natural advantages of high brightness, high contrast, gray display and wide color gamut in HDR applications. The only deficiency lies in cost control. However, with the upgrading of technology and process. The cost problem will eventually disappear.LED screen display world: the LED movie screen launched by Samsung last year already supports HDR technology. In your opinion, will HDR technology be widely used in China's LED display industry?Alto Electronics: LED display is developing towards the high-quality theater market in consumer entertainment, that is, to the fine display technology and high value-added market. With the continuous deepening of the application of HDR technology in the high-end market, it will be better popularized in China's LED display industry in the near future.LED display world: the development of small spacing has improved the display effect of LED display. What impact will the blessing of HDR technology have on small spacing?Alto Electronics: Although HDR began in the television industry and is mainly used in photography and film broadcasting, compared with traditional LCD and projection, LED has the characteristics of high brightness, high contrast, high gray display and wide color gamut. HDR technology will show better display effect on LED small spacing display screen, This is bound to lead to the in-depth development of small spacing display in the field of high-end display applications.epilogueHDR plays a great role in improving the display effect of LED display screen, and the impact will be far-reaching. Alto electronics, as one of the representative enterprises in the industry, took the lead in introducing HDR technology into LED display industry, which has played a good exemplary role. Although the application of HDR in LED display screen is still in the initial stage, we hope that through this interview, more people will understand HDR, and more enterprises such as Alto Electronics will participate in joint exploration, promote the development of new technologies, and then benefit the whole display industry.About Alto electronics Alto Electronics (Stock Code: 002587) was founded in 1993. Based on the technology leading global competition strategy, alto electronics has established a strong technology R & D team with strong technical strength to provide customers with high-quality products and services. Based on leading technology and accurate grasp of customer needs, alto electronics provides professional overall solutions for finance, advertising, performance leasing, sports, broadcasting, system integration, intelligent landscape lighting and other industries. These solutions have been applied to large commercial banks, world-famous advertising companies, world-class entertainment and sports events, world-famous TV stations Landmark buildings and control rooms create business value for customers. Alto Electronics will continue to adhere to independent innovation, establish its own brand and become a world-renowned excellent Chinese enterprise in the field of LED application and financial technology.
How Can the Life and Brightness of LED Display Screen Be Improved
How Can the Life and Brightness of LED Display Screen Be Improved
LED display screen is widely used in daily life, such as squares, gymnasiums, hotels, supermarkets, etc. wherever you can see public places, you can see the extensive use of LED display screen! How to make the service life and brightness of LED reach the standard of satisfactory use is a meaningful topic! To maintain long life and high brightness of LED display screen, the problems to be solved are: power supply, LED light source, heat dissipation and three key technologies. How to improve the service life and brightness of LED display?1. Power supplyThe primary requirement of power supply is high efficiency. For products with high efficiency, if the heating is low, the stability must be high. Generally, there are two schemes of isolation and non isolation in the power supply. The isolation volume is too large and the efficiency is low. Many problems will arise in use and installation, which is not as promising as the market prospect of non isolation products. Here we mainly discuss the non isolation drive scheme.2. LED light sourceThe chip is placed on the pins, and the heat energy passes through the silver foot to directly generate the tropical parts generated by the chip nodes. The simultaneous interpreting technology is qualitatively different from the traditional direct insertion products and the traditional patch products, and the temperature of the chip nodes does not accumulate, thereby ensuring the good usability of the lamp beads, ensuring the long life of the lamp beads and low light decay. Although the traditional chip products can connect the positive and negative electrodes through the gold wire of the chip, they also connect the heat generated by the chip to the silver foot through the gold wire. The heat and electricity are conducted by money. The long time of heat accumulation will directly affect the service life of LED display beads.3. Heat dissipationIn consideration of heat dissipation, we separate the heat dissipation of LED light source lamp beads and power supply without interference, so as to ensure the rationality of heat dissipation. There are three ways of heat conduction: convection, conduction and radiation. In a closed environment, convection and conduction are less likely to be realized, and heat is radiated through radiation, which is the focus of lamp beads.LED display screen is widely used in daily life, such as squares, gymnasiums, hotels, supermarkets, etc. wherever you can see public places, you can see the extensive use of LED display screen! How to make the service life and brightness of LED reach the standard of satisfactory use is a meaningful topic! To maintain long life and high brightness of LED display screen, the problems to be solved are: power supply, LED light source, heat dissipation and three key technologies.Source: Security Exhibition Network
Comparative Analysis of Two Design Schemes of LED Display Screen
Comparative Analysis of Two Design Schemes of LED Display Screen
LED display: a flat panel display, which is composed of small LED module panels. LED, light emitting diode (abbreviation for light emitting diode). It is a diode made of gallium (GA) and arsenic (as), phosphorus (P), nitrogen (n) and indium (in) by controlling the display mode of semiconductor light-emitting diodes. When electrons and holes are combined, it can radiate visible light, so it can be used to make light-emitting diodes. It can be used as an indicator light in circuits and instruments, or form a text or digital display. Phosphorus gallium arsenide diode emits red light, gallium phosphide diode emits green light, silicon carbide diode emits yellow light, and indium gallium nitrogen diode emits blue light. LED display screen is generally used to display text, image, video, video signal and other information.LED display circuit board is generally composed of lamp board and driver board. At present, there are two design schemes on the market, one is the combination of lamp drive and the other is the separation of lamp drive. Here are the differences between the two schemes.Lamp driving in one: LED lamp and driving IC are all on one PCB, and IC is on the front of PCB, eliminating copper bar insertion.Lamp driver separation: the LED is on an independent PCB board, and the driving IC is on another PCB board. The two PCB boards are connected by parallel insertion of row pins and row buses.Comparison between lamp drive integration and lamp drive separation:1. In terms of cost: the cost of lamp drive in one is slightly lower.2. From the perspective of maintenance: the lamp drive separation is easy to maintain, because it can be replaced with each other for detection. In addition, the lamp drive separation lamps are concentrated together, so it is easy to replace the lamps.3. From the perspective of heat dissipation, the separation of lamp drive is more conducive to heat dissipation.Generally, lamp drive separation is adopted for the following reasons:First: the LED display screen adopts plug-in led, and the lamp foot of LED affects the normal placement of back drive IC, so the lamp drive separation method is adoptedSecond: the distance between LED screen points is too small, which affects the wiring of PCB board in electronic design. The wiring area of PCB board can be increased by separating lamp driverThird: it is conducive to heat dissipation without affecting the display effect of LED. For example, when the LED lamp density is large, the heat of driving IC will be very high. At this time, the heat of driving IC will directly affect the LED lamp facing IC through PCB, so as to change the color of LED lamp. This will not happen with lamp drive separation.It is worth noting that generally, indoor scanning screens (due to the small number of chips) use more lamp drivers (cost saving), while outdoor LED displays usually use the form of lamp driver separation to prolong the screen effect and service life.Recommended reading: http://www.elecfans.com/d/784850.html
Technical Principle Analysis of Small Spacing LED Display Screen
Technical Principle Analysis of Small Spacing LED Display Screen
Small spacing LED display refers to indoor LED display with LED point spacing of p2.5 and below, mainly including p2.5, p2.083, p1.923, p1.8, p1.667, P1.5 and other LED display products. With the improvement of LED display manufacturing technology, the resolution of traditional LED display has been greatly improved.Today, we tend to take LED video display for granted. So do we know how the LED screen works? What is the principle of HD small spacing LED display? In fact, they become the common characteristics of our towns and us, mainly focusing on their external quality parameters.Five core technologies of small spacing LED display1. Reduce the dead light rate of the display lamp and ensure the stability of the screenThe dead light rate of the traditional LED display screen is one in tens of thousands in the industry standard, but the small LED display screen with small spacing can not be done temporarily. If there is one dead light in 10000 square meters according to the previous standards, the display screen can hardly be seen. Therefore, the dead light rate of small spacing LED display screen must be controlled at 1 / 100000 or even 1 / million in order to meet the needs of long-term use. Otherwise, if there are a large number of dead lights for a period of time, users can't accept it.2. Achieve low brightness and high grayMany people know that human body induction lamp is different from outdoor display, which requires high brightness, high refresh rate and energy saving. Indoor display needs to reduce the brightness. Experiments show that from the perspective of human eye sensitivity, the brightness of LED (active light source) is twice that of passive light source. In terms of specific data, the best brightness for small spacing led to enter the room is 200-400cd / m2. However, the gray loss caused by reducing brightness needs to be completed through technical supplement. At an exhibition of lianchengfa in 2016, the large screen display performance network released the test samples of small spacing led and gave the test methods and standards. The test shows that at present, only a few LED display manufacturers can achieve low brightness and high gray at the same time, and most manufacturers need to improve to a certain extent.3. Standard resolution of signal sourceUnlike the outdoor display, the outdoor advertising chamber of Commerce selects the content and display suitable for playback according to the resolution of the display screen. The indoor display signal source has certain standards. As a manufacturer of LED display screen, it is not required that the signal source connected to the indoor must adapt to the resolution of the display screen, but to adapt to the needs of the indoor signal source and design and ensure the corresponding resolution, So as to meet the needs of users as much as possible. Fortunately, after more than a year of understanding of indoor LED display products and customer needs, lianchengfa has completed this transformation and greatly met the needs of the majority of users.4. Support system access, display and control of multi signal and complex signalCompared with the outdoor display signal, the display signal of small spacing Lede display is characterized by multi signal access and complex signal access, such as multi place video conference, which requires remote access signal, local access signal and multi person access. The experiment shows that the simple implementation of multi signal access through excessive screen cutting scheme will reduce the signal standard. Therefore, how to solve the problem of multi signal and complex signal access also needs the technical support of small spacing led.5. Realize seamless joint and high-speed correctionThe biggest advantage of small spacing LED display is seamless, but it requires high splicing. For liquid crystal, as long as the seam is uniform, there is no problem, and the seam is not obvious. However, the small LED spacing can not be like this. If the modules are too tight, there will be bright lines. When the modules leave, there will be dark lines. So it's not easy to splice well. Therefore, the process and correction technology of the box and the guarantee and good combination of efficiency need to be guaranteed.Scanning mode of small spacing LED displayDynamic scanning: dynamic scanning implements "point to column" control from the output of driving IC to pixel points. Dynamic scanning requires control circuit, and the cost is lower than static scanning, but the display effect is poor and the brightness loss is large.Static scanning: static scanning implements "point-to-point" control from the output of driving IC to pixel points. Static scanning does not need control circuit, and the cost is higher than dynamic scanning, but it has the advantages of good display effect, good stability, small brightness loss and so on.With the development of LED technology, the brightness of LED electronic display screen is also increasing, and the size is becoming smaller and smaller, which shows that more LED small spacing electronic display screens will become the general trend.However, the improvement of brightness and pixel density of LED small spacing display also brings new and higher requirements to the control and drive of LED small spacing display. As far as the general indoor screen is concerned, the current common control methods adopt the row column split control mode, which is commonly referred to as the scanning mode. At present, the driving modes of LED small spacing display screen include static scanning and dynamic scanning. The static scanning is divided into static real pixels and static virtual, and the dynamic scanning is also divided into dynamic real image and dynamic virtual;In the LED small spacing display screen, the ratio of the number of rows lit at the same time to the number of rows in the whole area is called scanning mode. The scanning is also divided into several driving modes, such as 1 / 2 scanning, 1 / 4 scanning, 1 / 8 scanning and 1 / 16 scanning. In other words, if the driving mode of the display screen is different, the setting of the receiving card is also different. If the receiving card was originally used on the 1 / 4 scanning screen and is now used on the static screen, the display on the display screen will be bright every four lines. Generally, the receiving card can be set. After connecting the sending card, display screen, computer and other main devices, you can enter the relevant software on the computer for setting. Here we will first introduce the scanning mode and principle of LED small spacing display screen.Display principle of HD small spacing LED screenLED screen display resolution (so-called spatial resolution), which is closely related to the distance or pitch between pixels in LED video display;Maximum brightness of LED screen: the dynamic brightness range is understood as the number of brightness levels of the screen that can be supported (sometimes referred to as radiation or energy resolution);LED screen frame rate usually measures the frequency of frame change per second (FPS) (sometimes referred to as time resolution) of new data display that a video source can feed the whole frame;The number of LED screen refresh rate (in Hertz) is to draw data in the second display hardware, or refresh frame (also known as time resolution);Spectral resolution of LED screen: color images distinguish light of different spectra. Multispectral images solve even better than the need for different wavelengths of spectrum or copied colors. This word determines how many spectral components create an image; Color uniformity throughout the screen; Possibility of white balance and fine adjustment;Linear brightness sense of LED screen - subjective image quality, which determines the human eye to distinguish the dark and bright parts of the screen with adjacent brightness levels;LED screen image comparison; Image quality depends on the viewing angle. In addition to image quality, it is important to consider some key operating parameters of LED video display.The principle of high-definition small spacing LED display is briefly described; Mature software and integrated control system enable the system to expand and build led and LCD video display network and remote control through the Internet and built-in information security subsystem; The level of electromagnetic radiation is in the form of electromagnetic interference (EMI) from the screen.
Characteristic Analysis of Reflective LED Display Screen
Characteristic Analysis of Reflective LED Display Screen
1. Since a reflective cup with a square light outlet is added to each LED pixel, the pixel area is greatly enlarged and the pixel spacing is greatly reduced. In this way, the ultra-high pixel opening rate or filling coefficient completely eliminates the unique granular shape of LED display screen (which will form light pollution and cause damage to the viewer's retina), increases the smoothness of the image, and makes the image soft, friendly and friendly. At the same time, it also greatly improves the definition of LED display image (the definition depends on the number of pixels and the size of pixel area).2. Use metal mask.(1) The metal mask can make the heat generated by the LED chip radiate well. Good heat dissipation can also make the LED chip have longer life and less light attenuation.(2) The metal mask can avoid electromagnetic interference or other interference.(3) The metal mask does not crack and deform, and can work in various harsh environments.3. A reflective cup is added to each LED pixel, and its brightness can be improved by more than 60%. The improvement of brightness can make full use of the function of LED chip, so as to reduce the working current of LED chip, so it can reduce the heating capacity of LED chip, prolong the service life of LED chip, and reduce the light attenuation of LED chip.4. A black square grid is added on each reflective cup, which can greatly improve the contrast of LED display. It is particularly important that an all black LED display can be directly generated, and its brightness is hardly weakened.5. Due to the ultra-high pixel opening rate and the small distance between pixels, the LED display has an ultra-wide viewing angle of 170 degrees.
Introduction to Various Expenses Included in the Quotation of LED Display Screen
Introduction to Various Expenses Included in the Quotation of LED Display Screen
Friends who want to buy LED display will certainly ask for the quotation scheme of LED display as a reference. Is there any budget overrun. With many years of experience, we will introduce in detail the various expenses included in the quotation of LED display screen, so as to help you have an intuitive and clear understanding when purchasing LED display screen.1. Cost of display screen: it is generally calculated according to the price per square meter, that is, the quotation of common LED display screen is XXX yuan / m2, in which the quotation will be different due to different display screen models and materials. The quotation of the screen body includes the requirements for a full set of LED color screen: tube core, module circuit board, IC driver chip, module power supply, steel box and plastic mask, as well as all cables and connecting wires inside the display screen. Generally, the quotation includes tax. This may be different. Please ask clearly when consulting.2. Cost of control system: that is, the cost of sending card and receiving card of display screen. Generally, only one sending card is required for one screen, which is installed in the computer host, and there are multiple receiving cards. The number of control cards is mainly determined according to the size of the display screen. Generally speaking, the larger the area and the higher the density of the display screen, the more receiving cards are used.3. Control computer: necessary equipment for controlling LED display screen, with configuration requirements of or higher: Dual Core CPU, 2G memory, independent graphics card above 512M, and PCI slot on motherboard.4. Audio power amplifier: a device that allows the display screen to play video synchronously and make sound. It is generally equipped with 1 power amplifier and 2 audio.5. Distribution cabinet: small area led display screen can not be used; It is recommended to equip the display screen with the maximum power consumption of more than 10kW, which can provide voltage and power supply current for the stable operation of each device of the display screen equipment, and effectively prevent the failure such as box tripping of the power supply switch of the display screen.6. Air conditioning: cooling equipment, outdoor LED display more than 20m2 must be equipped with air conditioning by the manufacturer to ensure the normal operation of the screen and prolong the service life of various components of the display. Generally, indoor screen or small area display screen can not be used; It is strongly recommended that the large-area indoor display screen be equipped with wall mounted air conditioner to effectively cool down, ensure the normal travel of the display screen under high temperature and reduce the failure rate.7. Multi function card: for outdoor display screen. Its main function is to intelligently adjust the brightness, temperature and other values of LED full-color display screen in different periods, so as to save energy and power and prolong the service life of LED display screen; Indoor display screen can not be used.8. Lightning arrester: for outdoor LED display screen, mainly lightning protection device; Indoor display screen can not be used.9. Video capture card: TV card, a small card, installed in the computer, equipped with corresponding driver software, can make the display screen play cable TV channel programs synchronously. Whether it needs to be used or not, users can buy it by themselves, and the price is not expensive.10. LED video processor: mainly to improve the overall display effect and functional application of large screen and fully tap the value of display screen. It solves the problems of various video signal access, processing and display, and can complete the format conversion between many signal formats. There are many brands and models of LED video processors with different prices.11. Led playing software: including computer system software, LED video playing software, etc. It is generally provided free of charge.12. Steel structure and manual installation: it is used to fix the support for installing the display screen. Generally, it is a steel frame structure, as well as aluminum-plastic plate or stainless steel edging materials. Including manual installation cost (suggestion: the manufacturer can provide steel frame structure design drawings free of charge, and the customer can find the manufacturer to make them locally. The production is simple, which can be completed by ordinary workers, with low cost and convenient installation).13. Freight: depending on the transportation distance budget, I believe our customers can still accept it. In terms of expenses, the customer can also be responsible for it, just report it.
How to Set the LED Display Screen to Play Regularly and Switch on and Off
How to Set the LED Display Screen to Play Regularly and Switch on and Off
Large LED display screen is a common information display window for organs, enterprises and institutions, which plays a more and more important role in life. How to realize the LED display screen timing play and on-off? To this end, Maipu Guangcai has something to say: we all know that if the display all day depends on people to turn on and off the computer regularly, it will be very tired and delay time, so it is very necessary to turn on and off the machine automatically and play it automatically.How to play LED display regularly:To control the playback time of the LED display screen, you need to use the "regular sending" function in the installed software. Maipu Guangcai prompts you here: first edit the display file, and then specify the sending file corresponding to the sending time. Due to different control card software, different functions and different use methods; If your software can't achieve this function, you can consider using the secondary development function of the control card to write your own timing sending software.How to automatically switch on and off the LED display at fixed time:1 BIOS setting fixed-point automatic power on every dayStep 1: start the L E D display server computer, press del to enter BIOS, then select "power management features" and enter. Find the item "restore on AC / power loss" in the power window, press enter, and then set its value to "power on" through the direction key;Step 2: select "resume onrtc alarm" and press enter, and then set its value to "enable" through the direction key; Step 3: select "RTC alarm date", press enter, and then set its value to "every day", indicating that the same operation is carried out every day. In the same way, set "RTC alarm hours", "rtcala RM Mi nut e" and "RTM alarm second" to "07", "55" and "00", which means that the startup time is "7:55:00" in the morning. After all settings are set, press F10 to save and restart.Because the BIOS of different mainboards is different, the settings of some mainboards may be a little different from those above, but just remember to find the words "wake up" or "resume by alarm" in power management, because this is the option to set timed power on.2 With the help of shortcuts, the display information file is automatically run after startupStep 1: associate the display file with the display program. For example, the display file is "common. Led", and the program to open it is "led. Exe". Just right-click the "common. L e d" icon, click "properties", click the "change" button in the "general" option, find the program "led. Exe", and click "OK";Step 2: generate a shortcut to the display file. Right click the "common. Led" icon, click "create shortcut", and a "shortcut to common. Led" icon will appear. Then click "start", "run" and "Browse" in the lower left corner of the computer display screen, find the "shortcut to common. Led" file and confirm, and copy the "... Shortcut to common. Led. LNK" in the "open" column Note: if you click "OK", you can directly open the display file "common. Led";Step 3: set the startup item in the super rabbit. Download the super rabbit software on the Internet and install it into the LED display server computer. Open the "magic settings - create your own system" in the "rabbit tool", right-click in the "startup program", select "new project", paste "D: LED shortcut to common. Led. LNK" in the "command line", and set the title yourself.After this setting, the startup will automatically run the display file "common. Led", which has the same effect as manually opening "common. Led".fqj
Technical Principle Analysis of LED Display Screen
Technical Principle Analysis of LED Display Screen
Principle of virtual pixel displayThe virtual pixel LED display uses software algorithm to control the light-emitting tube and make the light-emitting tube participate in the imaging of multiple adjacent pixels. The virtual screen uses fewer light tubes to achieve greater resolution, which can improve the pixel resolution of LED display by 4 times.Definition of virtual pixel displayThe red, green and blue display components of each point in the display unit are evenly distributed to match the color mixing effect of pixels; The representation color of virtual display points is composed of adjacent red, green and blue pixels. The points of virtual pixels are scattered, and the points of real pixels are condensed. The luminous point of the virtual pixel is between the lamps, and the luminous point of the real pixel is on the lamps.Implementation method of virtual pixelIf the module is designed according to 2 red, 1 green and 1 blue, the conversion relationship between real point and virtual point is: M = 2m-1, M is the virtual point and N is the real point. For example, when m = 3, the real pixel is 3 & times; 5 dot matrix, virtual pixels are 5 & times; 9 dot matrix. Thus, we can get that if n is the number of row LED tubes and M is the number of column LED tubes, the pixel points displayed in real pixels are M & times; n. The pixels displayed by the virtual pixel are (2n-1) & times; (2m-1), so that when m and N are large enough, they are about 2n 2m, i.e. 4m n. So it's four times the real pixel.Fig. 1 implementation principle of virtual pixelFigure 2 module of virtual pixel display screenAnalyzing the module in Figure 2, take the green light as an example, there are 16 lights in the row and 8 lights in the column. Therefore, the actual point pixel is 16 8 Because the virtual pixel technology is adopted, the actual number of pixels is (16) 2 8 2) , that is, a fourfold increase.Analysis on the implementation process of LED display virtual technologyFigure 4 LED display virtual technology display process
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