Led display is an indispensable element in a world-class venue where the sport events are broadcast live or relayed. Besides making a profit from the led display, the most important thing is to guarantee the led display with stability, safety, operability, etc. What things should be pay attention to while installing and using a led display? How to choose the most proper led display for different stadium?
The led display plays the certain role in watching the sport events:
1. Over 95% of the audience with a permanent seat could see the screen(i.e. satisfy the audience with the furthest view distance) unless there is a special need;
2. The athletes, coaches and referee (except the live scoring referee in diving events ) in the field could see everything on the screen easily and clearly.
The reliability of the stadium outdoor led display
The stadium led display should follow the rules of 5.10 in SJ/T11141-2003.
The security measures of the stadium led display
1.The safety requirement should follow the rules of 5.4 in SJ/T11141-2003.
2.The power of stadium led display should be supplied alone. It should meet the requirements of 5.8 in SJ/T11141-2003. The cable construction of stadium led display should meet the requirements of GB50168,GB50171. The project quality should meet the requirements of GB50303.
3.The components (include: the cover of the led module, the filling of the led module, PCB, the protective case of power line) made of polymer material in the stadium led display should be flameresistant material.
4. The stadium outdoor led display should have the following functions: smoke alarm, lightning protection, fire autoalarm, and screen timeout. Power distribution cabinets should have the following functions: overload protection, earth leakage protection, powering the screen step by step
The furthest viewing distance and the character height of the stadium led display
1. the formula of the furthest viewing distance and the character height (refer to formula 1): H=K?d(H represents the furthest viewing distance, the unit is m; k represents the coefficient, usually it is 345; d represents the character height, the unit is m)
2. At least, each character height is higher than 0.2m on led display in swimming and diving venues which are built separately; each character height is higher than 0.28m on led display in swimming and diving venue.
The optical performance of the stadium led display
1.Viewing angle
The horizontal view angle of the stadium led display is more than 1500, vertical upward viewing angle is more than 100, downward is more than 200.
2.The brightness should meet the requirements of table 1 and it should be adjustable.
The unit of brightness for led display on table 1: cd/m’
3.Contrast ratio
The contrast ratio of led display should be up to 100e1 if the background illumination is less than 20lx.
4.White chroma coordinate
According to the operating environment, the white chroma coordinate is adjustable if the color temperature ranges from 5000k to 9500k. Following the rules of CIE1931 chromatic system, the allowance is △x∣≦0.030,∣△y∣≦0.030.
5. Uiniformity of luminance
The nonuniformity of stadium led display should be less than 10%.
What is shown on the stadium led display?
1.Scroll timers of the match in real time
2.Scroll the scores of the match
3.Flip the scores of the match
4.The displayed text can be switched automatically or manually
5.For the led display with the function to show picture, text, and video, it can be switched to show the text, picture, video or live broadcast automatically or manually
