With the application of LED display screens in sports venues, the installation and design of stadium LED display screens has become the focus of attention of venues and manufacturers. In this regard, some professionals have summarized the installation and design requirements for the LED display of stadiums in the following aspects.
First, the safety and reliability requirements of LED display, the density of stadiums and crowds is large, and the safety performance of the venue equipment should be placed first.
Under normal circumstances, the safety performance of the LED display of the stadium should meet the requirements of 5.4 of the SJ/T11141-2003 standard, and the reliability should meet the requirements of 5.10 of the standard.
In terms of material selection, it is required to select polymer materials with good flame retardant properties (including LED module casing, LED module filling glue, PCB board, power cord sheath, etc.), and in the power supply design, the stadium LED display must be separate. Power supply and meet the requirements of 5.8 of SJ/T11141-2003 standard; cable line construction acceptance must meet the requirements of GB50168, GB50171; engineering quality should meet the requirements of GB50303.
In addition, the LED display of sports events should have smoke, lightning protection, automatic fire alarm and automatic screen off function. The power distribution cabinet should have overload protection function, leakage protection function and step-by-step power-on function.
Second, the installation position and quantity requirements of the display
The installation position of the LED display of sports events needs to ensure that more than 95% of the audience in the stadium has a fixed seat, and the viewing distance and visual width are wide. At the same time, the LED display screen is required to allow the athletes, coaches and referees at the competition site (except for the on-site scoring referee in the diving competition) to be easily and clearly seen.
Third, the maximum viewing distance and character height requirements of LED display
The brightness of the outdoor stadium full-color LED display requires 5000cd/m2 or more; the double-primary display is 4000cd/m2 or more; the monochrome is 2000cd or more. Indoor stadium full-color LED display brightness requirements of 1000cd / square meter or more; dual-primary led display 300cd / square meter or more; monochrome 120cd / square meter or more. At the same time, in terms of character height requirements, the standing display of the swimming hall and the diving hall of the building structure are at least 0.2m each character, and the character of the led display of the swimming and diving hall with the building structure is at least 0.28m.
Fourth, the optical performance requirements of LED display
The LED display screen of sports events requires a wide viewing angle, large visual distance, uniform brightness and adjustable.
When the background illumination is less than 20lx, the contrast of the LED display should be 100e1. The white field chromaticity coordinates can be adjusted within the color temperature of 5000K-9500K according to the use environment. According to the CIE1931 chromaticity system, the tolerance is 0.030.
Five, LED display content can be controlled in real time
It is required to display the rolling timing of the game in real time; it can display the results of the rolling competition; the page can display the results of the game; the displayed text content can be switched automatically and manually. For full-color LED display with graphic and video display functions, text and pictures, animations, and live broadcast images should be automatically and manually switched between each other.
In order to ensure convenient and accurate use of the display screen, the multi-purpose gymnasium should adhere to the requirements of high standards, high technology and high quality in design and manufacture, which can be analyzed from the following aspects.
High standard materials
Luminescent material. Luminous materials are the most important materials for displays, especially full-color displays. They are the key to ensuring display performance, high reliability and long life. The main reference indicators are brightness and uniformity. Control the driver chip. The control driver chip is the guarantee of the key design of the display. Due to the high technical content of this part and the uneven level of the manufacturer, the design of this part should be treated with caution.
Switching power supply. The switching power supply is a component with a high failure rate in the display. It must use a high-quality switching power supply to ensure that the display requirements of the stadium display are met.
High level of control technology
The stadium display is a large-scale facility for competitive projects. It needs to integrate advanced technologies in the industry, such as static latch technology, white balance technology, nonlinear correction technology, high gray level technology, and color uniformity technology. Video processing technology, fast motion image compensation technology, full brake control technology, etc.
Quality assurance for design and installation and commissioning
The stadium display screen is generally used for sports competitions and large-scale events. Any faults and mistakes will have a great impact, so stable engineering quality is an objective requirement of users. In order to meet the requirements and ensure the stable and reliable operation of the display, it is necessary to ensure quality in the design, production, installation, commissioning and delivery, and use an effective quality assurance system to ensure the entire production process.
The design, manufacture, installation, commissioning and operation of the LED electronic display must be matched with the plane and profile of the stadium, and the overall effect should be coordinated. At the same time, the power supply structure of the site should be fully considered.
In general, the power supply should be guaranteed to operate normally in the range of (220 ± 22) V and (380 ± 38) V. In addition, all control equipment should be concentrated in one control room, and the access points of the control equipment should be left in the referees of various competitions.
The venue is large, and the audience seats more than 5,000 gymnasiums. Generally, two LED electronic displays with an area of 40M2 can be constructed. One screen is divided into three parts: clock area, full-color area and double-primary area. The other screen can be divided into three parts. It is a two-part clock area and a dual primary color zone. This not only ensures the satisfaction of various functions, but also ensures the rational use of funds. If the funds are sufficient, and it is possible to undertake large-scale gatherings or competitions in the future, you can also make the two screens into full-color screens, so that the playback effect will be more realistic and the atmosphere will be more intense.
Analysis of the demand for LED display content
The versatile modern gymnasium can be used not only for holding various sports competitions, but also for holding various large-scale literary events and gatherings. Therefore, the display content requirements of the display screen can be summarized as rich, diverse and real-time, as follows:
The need to broadcast live video images
The sports competitions, cultural performances and large-scale events held by the stadium can be broadcast live through the electronic display, and have special effects such as panorama, close-up, slow motion, flashing action, towed images, nostalgic movies.
Compatibility requirements for multiple input methods
The stadium display screen can not only be real-time live broadcast of real color by camera, but also broadcast TV and satellite TV programs, play VCD, DVD, LD and various homemade video signal programs, support PAL, NTSC and other various formats, the display content can also be Various graphic information on the computer, from the internal information network of the stadium or the public information network; it has the function of superimposing text information on the TV screen, and can also superimpose text, picture, animation and other functions outside the video image; Play related background images during large gatherings.
The need for colorful graphic information playback
On the one hand, the stadium display can be used for live broadcast of video images. On the other hand, it can publish news, important notices, and slogans. The display can display text, graphics, patterns, animations, etc. The function of the text.
The need for multiple broadcast methods
To have pan, scroll, rotate, wipe, draw, single/multi-line pan, single/multi-line up/down, left/right pull, up/down, page flip, move, rotate, zoom out, zoom in, blink In order to hold large-scale international sports events and events, the display screen is compatible with the languages of various countries. For example, it can display Chinese, English, numbers and various characters, and there are many font fonts to choose from. Level zoom.
The need for in-stream advertising and display methods
As the most attractive display media in the gymnasium, the full-color display of the stadium will inevitably become the first choice for the publicity of the majority of enterprises. Therefore, the needs of displaying the content must also fully consider the needs of the advertisements of various businesses, so that the display can be quickly and conveniently. Interspersed with corporate advertising to meet the needs of our customers.
Needs for sports competition information and sports results announcement
The release of sports competition information and achievements is the basic requirement for the electronic display to realize its display function. Therefore, the design requirements should be fully considered in the use of various sports competitions, and game information such as basketball, volleyball, badminton, table tennis, Weightlifting, gymnastics and other game information, in the results announcement can display country name, team name, name, athlete number and score record; the game can display a variety of real-time information, such as the team name, score, goal athletes, change The name, number and number of athletes who are penalized by the person.
The clock shows the demand
Another display function of the stadium display is to have an accurate clock display function. The clock display function includes Beijing time, match clock, countdown display, different game clocks can be set according to different game items and referee rules, and the time stop can be conveniently controlled. , reset, fast adjustment, slow adjustment, etc.
audio synchronization playback needs
The stadium display has an audio interface that can be combined with the sound in the stadium to achieve sound image synchronization.
high brightness. Since stadium competitions and events take place during the day or under intense lighting, the display must be bright and clearly visible under strong light.
Moisture, corrosion and heat dissipation. Due to the large size of the display screen, fixed installation, and more wiring, it is not possible to make special storage methods. In addition, it should adapt to the humid, rainy and hot weather that may occur in the installation area. Therefore, to ensure stable and reliable use, it must be designed and constructed. Consider moisture, corrosion and good heat dissipation measures. At the same time, the display should be dust-proof.
LED display referee system needs analysis
The normal service function of the display must be completed by the referee and the perfect software support. The referee consists of a timer and a scorer. The Software should be a complete package that must be fully supported for different sports competitions and refereeing rules.
LED display system needs analysis The stadium display is an important part of the stadium's electronic information system, so the display and control system is a systematic project. The computer, the stadium, the referee station, the referee, and the news center of the gym are integrated into one, which serves the entire sports competition efficiently. It is a systematic design, and this part is for the entire large-scale sports activity network. It is only one of the components, so compatibility should be fully considered in the overall system design. All interfaces use standard interfaces to form a systematic facility for sharing information resources with the network.
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