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 Set the LED Display Screen to Play Regularly and Switch on and Off 1

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 startup

Step 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

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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.
What They Don't Tell You About IPhone Screen Replacement
What They Don't Tell You About IPhone Screen Replacement
So you've watched the videos and looked at the photos of iPhone 3G disassembly and now you are ready for action. The glass screen is cracked and/or the LCD is broken and you have no intention of spending days without your device and paying Apple $200 or more. Although the do-it-yourself attitude is noble, it could cost you even more money if you are not careful. The tutorials above are a good start, but more details can only help. Take these tips to heart if you are going to fix the screen yourself.First and foremost do not ever buy the glass alone (typically $20). It's useless. The digitizer can not be detached from the front glass. The next best option is the front glass and digitizer together (around $60). The LCD is mounted with screws behind the digitizer and runs $80-90. Remember, you perform this repair at your own risk, and will render any remaining warranty invalid.1) Removal of all screws requires a 1.4 mm phillips screwdriver. Be sure the work area is free of dust and debris. One speck of dirt between the glass and LCD will annoy you forever.2) Use a plastic case opener or prying tool.You must push down on and stretch the black rubber seal that goes between the silver bezel and the glass. Best to damage it in only one spot directly above one of the screw holes near the home button. Razor blades or screwdrivers will not easily fit between the bezel and glass or exert pressure in the right place. It takes some depth to get under the glass and black plastic home button frame to lift it up. The glass can easily be cracked (or cracked worse) with the wrong tools or pressure.This could also result in glass particles flying directly into your eye.3) When removing the ribbon cables be sure that cable number 4 does not accidentally come off.4) Removal of the LCD from the front glass assembly requires care. Do not use the case opener tool to pry the LCD out of the metal frame after all 6 screws are removed. If necessary pull up with the tool on the metal backing of the LCD to lift it free. The easiest way to crack your LCD screen is to pry between the LCD and the front glass!5) When prying the black plastic home button frame from the front glass exert pressure from the inside of the frame to prevent further damage to the black rubber seal surrounding the glass. The plastic frame is attached to the glass and digitizer with adhesive. Be patient.The plastic frame is extremely fragile and can easily be broken along the corners or sides where it's thin.6) After the parts are disassembled remove all of the packaging materials and stickers from the new parts. Again be sure that all parts are dust, dirt and fingerprint free.7) Before you begin to reassemble the phone make sure the ribbon cable coming out of the new digitizer is oriented properly. It must be folded down into the body of the phone. There is another small black ribbon on the digitizer that can easily slip up into the SIM card tray slot. Make sure this ribbon is also folded downward into the unit as you reassemble.8) Some suggest double-stick tape to attach the new glass front piece to the black plastic home button frame.A few dabs of rubber cement will work well if you are patient enough to hold the assembly together while the glue dries.9) Take care when reattaching the ribbon cables. They are extremely delicate. Do not destroy your motherboard.10) Another fraction of a drop of glue on the screws will help to keep them from working lose. Mobile devices are subject to a lot of vibration and stress. The blue material on the screw threads served this purpose until the screw was removed.My 18 month old iPhone 3GS won't turn on. I had the screen replaced in apple store on tuesday and was advised?Take it back to the apple store I am guessing it isnt connected any more we got a new screen too and it did that get ask them to fix it cause they screwed up
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.
OLED Splicing Transparent Display Screen Self Luminous Technology Ultra Thin Transparent Display Scr
OLED Splicing Transparent Display Screen Self Luminous Technology Ultra Thin Transparent Display Scr
OLED technology advantages1. Excellent blackInfinite contrast and perfect blackSelf luminous pixels can be turned on and off independently, showing perfect black. No light leakage, absolute black creates infinite contrast.2. Perfect colorAccurate & stable colorSelf luminous pixels can accurately restore color, lifelike.3. Perfect perspectiveWide perspectiveOLED has a wide range of perspectives and can maintain amazing picture effects from all angles.4. Smooth dynamic pictureFaster responseOLED has 5000 times faster dynamic picture response time, perfect clarity and no tailing.5. Perfect industrial designTo light to thinWith only two layers of structure, OLED has an incredibly thin body.Basic composition of transparent screen splicing wall:(1) OLED transparent splicing unit: including LG original OLED panel, drive unit and movementThe transparent screen uses LG self luminous OLED panel, and each unit of the splicing wall has an independent switching power supply module to ensure the stable operation of the system for a long time. A software package is provided for splicing wall system control, which can be installed on any brand of PC, run the software under Windows environment and communicate through RS232C network interface to control the signals and various functions of splicing wall.(2) Control softwareThe whole system supports the input of HDMI, DP, VGA, DVI and AV signals. The above signals can be controlled and switched by the large screen control software, and any one or more signals can be displayed on the large screen, and has the splicing and amplification function, which can effectively meet various display needs. The large screen management software adopts the all Chinese graphical interface, provides a friendly all Chinese man-machine interface, has the function of saving and calling the display mode, and has the mode polling function. The polling mode and time can be customized by the user, and the user operation is more convenient and fast; The software can be installed on any computer in the LAN to control the splicing wall through RS232C.Diversified image splicing display function: the whole large screen system is operated and controlled by a set of control software. The operator can set all parameters of the large screen system through the software to realize information display, signal switching and other operations. The software can manually adjust the position, brightness, contrast, color saturation, clarity, color, etc. of the selected unit (single or several or whole screens), and can automatically adjust the position, brightness, contrast, color saturation, clarity, color, etc. of the selected unit (single or several or whole screens). Parameters can be saved automatically after adjustment. The color matching software shall have intelligent color matching function(3) Installation modeThe installation mode can be designed according to the installation environment and customer requirements. OLED transparent screen can be fine tuned up, down, left, right, front and back, and the splicing is flat to ensure seamless and beautiful splicing.(4) Various wiresVarious serial port network cables and HDMI / control wires will be customized according to the field installation quantity, length and other data.
Discussion on the Solution of Air Tightness Detection of Electric Bicycle Display Screen
Discussion on the Solution of Air Tightness Detection of Electric Bicycle Display Screen
Electric bicycle display screen is also called electric bicycle instrument panel. The display screen of electric bicycle generally displays the current battery power or battery voltage, vehicle speed, driving mileage and time, fault information, etc. you can see the operation of electric bicycle at any time. The internal circuit of electric bicycle display screen belongs to electronic products, and electric bicycles are generally used outdoors, often driving in the rain or parking outdoors.Therefore, the display screen of electric bicycle must have waterproof performance higher than IP67 waterproof and dustproof grade, so as to ensure that the display screen of electric bicycle can operate normally in any environment. Therefore, the manufacturer will test the air tightness of the instrument before leaving the factory. What is the solution for the air tightness test of the display screen of electric bicycle.The traditional detection method adopts the water detection method (bubble detection method), the result is very intuitive, but the detection accuracy and efficiency are low, and there are many electronic components in the electric vehicle instrument. If water enters the instrument, it will directly damage the internal electronic components, so the water detection method is rarely used. For electronic products, dry compressed air (which will not cause secondary damage to the product) is widely used as the detection medium to detect the air tightness of the display screen of electric bicycle. The detection instrument used in the air tightness detection solution of electric bicycle display screen is air tightness detector.According to the product shape, goer technology has made a profiling mold according to the product shape, and placed the product in the air tightness detection mold of the electric bicycle display screen. The air tightness detector of the electric bicycle display screen will fill the mold with quantitative compressed air, The air tightness detection equipment of electric bicycle display screen detects the change of compressed air in the mold in real time to judge whether the product has leakage.The specific waterproof detection process of the air tightness detection solution for the display screen of the electric bicycle is as follows: connect the customized detection fixture to the air tightness detection equipment, set the test parameters according to the waterproof level to be tested and other requirements, and then connect the air tightness detector equipment and the test tooling to the air source and power supply respectively, The air tightness detection and sealing test of the display screen of the electric bicycle can be started. The instrument will automatically determine whether the product is OK or ng according to the set parameters.fqj
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.
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
Structure Composition and Characteristics of LED Electronic Display Screen
Structure Composition and Characteristics of LED Electronic Display Screen
Now generally, the LED display screen that displays graphics or text is called graphic screen. In fact, the LED graphic display screen does not have a recognized and strict definition. The so-called graphics here refers to any graphics composed of monochrome dot matrix lines with fixed brightness, in which the LED dot matrix light-emitting devices either light or turn off, that is, there are only two states.LED electronic display screen is composed of special computer equipment, display screen, video input port and system software.Computer and special equipment: computer and special equipment directly determine the function of the system, and different types can be selected according to different requirements of users for the system.Display screen: the control circuit of the display screen receives the display signal from the computer, drives the led to emit light to produce a picture, and outputs sound by adding power amplifier and speaker.Video input port: provide video input port. The signal source can be video recorder, DVD player, camera, etc., and support NTSC, pal and s_ Video and other formats.System software: provide special software for LED playback, PowerPoint or es98 video playback software.LED display screen mainly has the following characteristics:1. High brightness: the brightness of outdoor LED display screen is greater than 8000mcd / , which is the only large-scale display terminal that can be used outdoors all day; The brightness of indoor LED display screen is greater than 2000mcd / .2. Long service life: the service life of LED is more than 100000 hours (ten years). This parameter generally refers to the design service life, even if the brightness is dark.3. Large viewing angle: the indoor viewing angle can be greater than 160 degrees and the outdoor viewing angle can be greater than 120 degrees. The size of the viewing angle depends on the shape of the LED.4. The screen area can be large or small, ranging from less than one square meter to hundreds or thousands of square meters; 5. Easy to interface with computer and rich supporting software.Recommended reading: http://www.elecfans.com/d/879147.html
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