Have you encountered this situation? When I was in a hurry to catch the train, I couldn't find the ticket gate information in the hall. I looked up and saw the display screen hanging on the five-meter-high beam - the characters were as small as an ant! What’s even more annoying is that the LED screens at some stations are clearly in front of you, but they are blocked tightly by the pillars... Today we will talk about where should the LED display be installed in a special scene in the station?

1. First understand three basic common sense

​​1. "The bigger the station display, the better"​​
The waiting room is usually 6-8 meters in height, and installing a giant screen of 20 square meters is a waste. There is a calculation formula to remember:​Single screen area = maximum sight distance (meter) × 0.6​​. For example, the maximum sight distance of the waiting hall is 30 meters, and 18 square meters is enough, and no matter how big it is, it will be dazzling.

​​2. "Position is more important than resolution"​​
The actual appearance of P4 and P6 screens in the station scenes are not much different, and the focus is on the installation point. A textbook on the contrary: A subway station installed the screen directly above the escalator, and the passenger almost fell down when he looked up at the information - this position should be installed on the side!

​​3. "Dynamic content must be blocked at the right pace"​​
Refreshing train schedules too quickly can make people anxious, and being too slow will affect information transmission. Tested data:3 pieces of information are played every 15 seconds​The most in line with the human eye capture habit. It is recommended to use Siyuan bold GB2312 font size ≥120px.

2. Analysis of the five major golden points

1. ​​Under the canopy at the entrance of the station​​
   It is best to be 2.5-3 meters above the ground. This height is both rainproof and can be seen clearly 10 meters away. Be carefulAvoid electromagnetic interference of security instruments​, Keep the spacing above 1.5 meters, otherwise the screen may be splashed.

2. ​​Side of the waiting hall column​​
   Don't underestimate the pillars! In the 8-meter-high space, installing the bar screen 1.8 meters away from the ground is more eye-catching than the ceiling screen. I have a cold knowledge:15 degrees tilt installation​The viewing angle can be expanded to 170°.

3. ​​Back of the platform safety line​
   Here we need to focus on preventing vibration! Vibration generated when the train enters the station may loosen the module screws. Recommended to choose​Die cast aluminum box + silicone shock absorbing pad​, don’t forget to fasten the connector once a month.

4. ​​At the corner of the transfer channel​​
   The "bottleneck" area with the most crowded flow of people, the display screen must be availableMulti-directional visualization​Function. There is an innovative design: put the three screens into an angle of 120°, and you can see the front face from no matter which direction you come from.

5. ​1.2 meters above the ticket window​
   This position is the easiest to be overlooked! In fact, passengers queuing up to buy tickets need to check the remaining ticket information in real time. Pay attention to installation time2.2 meters above the ground​, avoid encounters and allows people in wheelchairs to see clearly.

3. Don't step on these pitfalls

​​"On the opposite of the glass curtain wall?"​​
Last year, a high-speed rail station suffered this loss - the glass reflection during the day turned the screen into a mirror! Solution:
① Select​5000cd/m² highlight screen​​and automatic adjustment with light sense
② Apply anti-glare film on glass
③ The screen is slightly tilted downward by 5°

​​"Whether the power supply is connected to the lighting circuit?"​​
Something big is going to happen! The station display must​Pull 380V three-phase electric power alone​​, never share the lines with security monitors and broadcast systems. There is a painful lesson: due to overloading of circuits in a certain station, the display screen and X-ray machine were blackened at the same time...

​​"If you do well waterproofing, everything will be fine?"​
In addition to protecting against rain, outdoor spots should also protect against condensation! Especially in areas with large temperature difference between day and night, condensation may occur inside the screen. A trick to teach you: stick it inside the box​Absorbent resin sheet​, replaced once a month.

4. Hidden parameters that only veteran drivers know

​​Refresh rate must be ≥1920Hz​
The station surveillance camera is always on, and the ordinary screen will be photographed with water ripples. The test method is very simple: use the phone to shoot at 240 frames of slow motion, and the picture does not shake.

​​Brightness automatic adjustment curve​
Don't believe in fixed percentage adjustment! High-quality screens can be intelligently matched according to ambient lighting, such as:

• Sunny noon: 100% brightness (5000cd/m²)
• Cloudy evening: 60% brightness
• Late night time: 30% brightness with soft light mode

​​Preparation spare parts should be prepared in advance​
It is recommended to store modules at 3% of the screen area, such as 100 square meters of spare parts for 3 square meters of screen storage. In case of emergencies, the maintenance staff can complete the hot-swap replacement in 20 minutes.

(Suddenly patted your thigh) By the way! Don’t be greedy for cheap use of ordinary cables. The electromagnetic environment of the station is very complicated. Choose a double-layer shielding​CAT6 network cable​, if the transmission distance exceeds 80 meters, you must add a repeater, otherwise the signal attenuation will cause the screen to tear.

Having said so much, the most important thing is to choose the right partner. Those manufacturers with monthly output of tens of thousands of square meters have undergone rigorous vibration tests and salt spray tests, and their service life is more than five years longer than that of miscellaneous products. Next time, your station will be renovated. Remember to check whether the supplier has experienced international competitions - this kind of product that has been tested in practice is reliable!

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