With the use of LED display in stadiums and gymnasiums is becoming more and more popular. LED display technology has been challenged by security, reliability, and audience requirements for display effect. Let’s look at the stadium LED display screen should have what requirements
1, LED display
With the use of LED display in stadiums and gymnasiums is becoming more and more popular. LED display technology has been challenged by security, reliability, and audience requirements for display effect. Let’s take a look at the requirements of LED display in stadium
1、 LED display screen security and reliability requirements, the stadium crowd density is large, its stadium equipment use safety performance should be put in place
Generally, the safety performance of LED display screen in stadiums and stadiums should meet the requirements of 5.4 in SJ / t11141-2003 standard, and the reliability should meet the requirements of 5.10 in the standard. In terms of material selection, it is required to select polymer materials with good flame retardant performance (including LED module shell, LED module filling glue, PCB board, power line sheath, etc.), at the same time, in the power supply design, the LED display screen of stadium must be powered separately and meet the requirements of 5.8 in SJ / t11141-2003 standard; the cable line construction acceptance shall meet the requirements of GB 50168 and GB 50171; the engineering quality shall meet the requirements of GB 5033. In addition, the LED display screen of sports events should have smoke detection, lightning protection, automatic fire alarm and automatic screen closing functions. The power distribution cabinet should have overload protection function, leakage protection function and step-by-step power on function.
2、 Installation position and quantity requirements of display screen
The installation position of LED display screen of sports events needs to ensure that more than 95% of the audience with fixed seats in the stadium can watch effectively, with wide visual distance and vision. At the same time, the LED display screen is required to make the athletes, coaches and referees (except for the on-site scoring referees in diving competition) can easily and clearly see the content.
3、 Requirements for large visual distance and character height of LED display screen
Outdoor stadium full-color LED display brightness requirements of more than 5000 CD / m2; dual primary color display screen more than 4000 CD / m2; monochrome 2000 CD, more than m2. More than 1000 square meters LED / full color LED / 300 square meters of indoor full-color display screen. At the same time, in terms of character height requirements, each character of LED display screen of swimming pool and diving hall with independent building structure shall be at least higher than 0.2m, and each character of LED display screen of swimming pool and Diving Hall integrated with building structure shall be at least higher than 0.28M.
4、 Optical performance requirements of LED display screen
The LED display screen of sports events requires wide viewing angle, long visual distance, large vision, uniform brightness and adjustable brightness. When the background illumination is less than 20lx, the contrast of LED display screen should reach 100e1. According to CIE1931 color system, the tolerance is △ x ∣ ≤ 0.030, ∣△ y ∣ ≤ 0.030.
5、 LED display can be controlled in real time
It is required to have real-time display of the game rolling timing; it can display the rolling competition results; it can turn pages to display the competition results; the displayed text content can be automatically and manually switched. For the full-color LED display screen with graphic and video display functions, the text and pictures, animation and live images should be able to switch automatically and manually.
In order to ensure the convenient and accurate use of the display screen in the multi-functional gymnasium, it is necessary to adhere to the requirements of high standards, high technology and high quality in the design and manufacture. The specific analysis can be made from the following aspects.
1.1 high standard materials
Luminescent materials. Luminescent material is an important material of display screen, especially full-color display screen. It is the key to ensure display effect, high reliability and long life. The main reference indexes are brightness and uniformity.
Control driver chip. The control driver chip is the guarantee of the key design of the display screen. Due to the high technical content of this part and the uneven level of the manufacturers, the design of this part should be treated carefully.
Switching power supply. Switching power supply is the component with high failure rate in the display screen. High quality switching power supply must be used to meet the use requirements of gymnasium display screen.
1.2 high level control technology
Gymnasium display screen is a large-scale facility serving for competitive events. In its control technology, it needs to integrate the advanced technology of the industry, such as static latch technology, white balance technology, nonlinear correction technology, high gray level technology, color uniformity technology, video processing technology, fast motion image compensation technology, full brake control technology, etc.
1.3 quality assurance of design, installation and commissioning
Gymnasium display screen is generally used in sports competitions and large-scale activities. Any fault and error will cause great influence, so stable engineering quality is the objective requirement of users. In order to meet the requirements and ensure the stable and reliable operation of the display screen, it is necessary to take the quality as the guide in the design, production, installation, commissioning and delivery, and ensure the whole production process with an effective quality assurance system.
The design, manufacture, installation, debugging and operation of LED electronic display screen must be matched with the site plane and section surface of gymnasium, and the overall effect should be well coordinated. At the same time, the power supply structure of the venue should be fully considered. Generally speaking, the power supply should be ensured to work normally in the range of (220 ± 22) V and (380 ± 38) v. In addition, all control equipment should be concentrated in a control room, and there should be access ports for control equipment in the referee seats of various competitions.
A gymnasium with a larger venue and more than 5000 spectator seats can be built with an area of 40m2
