From a variety of parties, to event reports, etc., basically inseparable from LED display, so today, we will explain in detail how to ensure the stability of the stage LED display from three aspects: material selection, system control scheme, and display working status.
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How to choose the raw materials of LED display include LED lights, driver ICs, power supplies, power signal connectors, etc., which are the core elements that determine the quality of LED displays.
Therefore, the requirements for material selection are: international well-known brands, higher than industry standards for relevant testing, and various protection function requirements.
For example, switching power supply selection requirements: there is overheating protection, AC input should support wide voltage, anti-surge. The DC output should have overvoltage and overcurrent protection. The structural design not only ensures the beautiful and fashionable body of the box, but also ensures good heat dissipation and fast splicing.
The technical requirements of the system control scheme are extremely high for its stability during work because of the particularity of the stage LED display. Therefore, each link of the system control scheme has a hot backup function, including video transmission, receiving equipment, signal transmission cables, etc.
It can ensure that when an unexpected situation occurs in a certain part of the system, the system can automatically diagnose and switch to the standby equipment at a very fast speed, and the entire switching process will not affect the display effect on the site.
For example, in order to meet the needs of the stage scene, the stage LED display needs to be mobile splicing at the live broadcast site. If a display signal input line in the middle of the large screen is loosened due to staff negligence or other reasons, in the conventional control scheme, all displays will have no signal from the beginning of the loose box to the end of the signal cascade.
If the hot backup scheme is added to the control system, the hot backup function is activated at the moment when the signal line is loose, then the stage LED display can still work normally and will not have any impact on the live broadcast scene.
Real-time monitoring of working status The working status of the stage LED display can be monitored in real time with the computer, including temperature, humidity, voltage, smoke, working status of the cooling fan, etc.
It can automatically adjust the occurrence of various conditions, and provide location and alarm for abnormalities.
For example, when the temperature inside the box is relatively high due to environmental or other factors, then in the absence of timely treatment, the power supply inside the box will be over-temperature protected at any time. If the display working status monitoring is carried out in this case, the system will reduce the internal temperature of the display by intelligently adjusting the working state of the display.
When the intelligent adjustment cannot reduce the temperature to the set target, the system will alarm through the staff setting method, and provide the abnormal box position to notify the staff to deal with it in time. Ensure the normal working state and safe use of the display.
In short, if you want to improve the stability of the stage LED display, you must consider comprehensively from various aspects such as material selection, hardware design, system control scheme, etc.
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LED is controlled in a fixed control way, the luminous efficiency of LED color display and LED electronic display is related to the manufacturing material and process of LED, and red, green and blue are now widely used. Since the working voltage of LED electronic displays is low (only 1.5-3V), they can actively emit light and have a certain brightness, so the voltage can be adjusted by current (or current), and the current itself is shock, vibration and long life (100,000 hours) Due to the high luminous efficiency, large display devices currently do not have other display modes that can be compared with the LED electronic display mode.
Usually, LED display manufacturers make 8mm/16/16/16*32/32/32*32 standard point matrix form on the PCB circuit board to facilitate engineering installation. Marking module; In order to improve the structural strength of the LED electronic display, the display module is installed in an iron box with high strength, which has a power supply, control system, heat dissipation system, etc., and is waterproof and dustproof. A plurality of iron boxes, display modules and systems with dustproof, lightning, shockproof and other functions make up the entire LED electronic display.
It is possible to distinguish the number of dimtest and brightest brightness of LED electronic displays at the same brightness level. Whether monochrome, two-color or tricolor screens are made of LEDs, the brightness of each LED required to compose the image should be adjustable, and the degree of adjustment is the grayscale level of the electronic display. The higher the grayscale level, the finer the displayed image, the richer the color, and the more complex the corresponding display control system.
In general, images with 256 levels of gray have very smooth color transitions, while color images with 16/32/64 grayscales have clear color transition boundaries. Therefore, the current LED electronic display must be 256/16384 grayscale, and the color combination and tone of this grayscale far exceeds the color resolution of the human eye.
LED electronic display is composed of tens of thousands to hundreds of thousands of semiconductor light-emitting diode element points evenly arranged. Different materials can be used to manufacture LED element points of different colors. Characters are displayed by the light on and off. It is used to display text, graphics, images, animations, quotes, videos, video signals and other information display screens. It can be used not only for indoor environments but also for outdoor environments, with advantages that projectors, video walls, and LCD screens cannot match. The reason why LED has been widely valued and developed rapidly is inseparable from its own advantages. These advantages can be summarized as:
1. The high update (frame change) frequency (not less than 300HZ) greatly improves the stability of the image.
2. High gray level (degree level), so that the conventional true color data RGB each 8 bits (256 levels of data) is expanded to 14 bits respectively, and through the local control scanning, the 14-bit data volume is completely converted into 214=16384 brightness grades, so as to achieve 16384 levels of grayscale.
3. Through the visual characteristics of the human eye, according to the change of ambient light during the day and night, the highest brightness and the lowest brightness value are changed (according to the color checklist). 【LED electronic display】
4. Reasonable structure and simple combination make the weight of the display curtain body reach the minimum.
5. Reasonable working current, not only does not reduce the brightness, but also improves work efficiency.
6. The use of data block processing, synchronous and parallel communication of each block, greatly improves the speed of communication.
7. The use of photoelectric isolation technology greatly improves the performance of anti-static and lightning protection.
8. LED electronic display screen can be remotely controlled through the network system.
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