Have you ever gotten lost at a station? The radio is obviously reporting train times, but the corresponding station can't be found? Look up at this time, and the flashing red display may be your savior. Let’s chat today,​ ​Where are these illuminated “guide signs” hidden in the station and how to choose them?​​。

1. Can’t find the north? Find these places first

(Take out your notebook and jot down the key points, friends) Station LED screens are not hung casually, their locations are particular. According to my observation experience over the years, it can be divided into three main parts:

1. ​​Information tower overhead​​
   The large screen directly above the entrance to the station is most likely broadcasting the train schedule. The brightness is so high that you can see clearly under the bright sun - you guessed it, the brightness of this kind of outdoor screen is basically above 4000cd/mm2, which is about as bright as a car's high beam.

2. ​​The considerate assistant in the corner​​
   The small square screen next to the pillar in the waiting hall usually displays ticket gate change information. I saw it at Shenzhen North Railway Station last week. The train information on temporary diversions was updated instantly, two or three seconds faster than the broadcast.

3. ​​Navigator underfoot​​
   Occasionally, you can see luminous arrows on the ground of the platform, which are actually LED floor tile screens. The last time I saw the news, it was said that a station in Tokyo used this to guide night bus passengers, and the delay rate dropped by 18%.

2. What can these screens do?

(Do you think it just shows the time? Too underestimated them) Today’s station LED screens are no longer simple electronic bulletin boards:

• ​​Emergency rescue king​​
  In the event of train delays or emergencies, all screens will instantly switch to emergency mode. I saw it with my own eyes during a typhoon last year. The screen at a high-speed rail station was replaced with an evacuation route map within 30 seconds, with flashing arrows for guidance.

• ​​Transformers in advertising space​​
  Have you noticed that I give directions during the day and advertise at night? Nowadays, high-end screens can automatically adjust the brightness, making it blindingly bright during the day and automatically softening at night. I heard that one screen saved 40% of the electricity bill after doing this.

• ​​Translator for foreign friends​​
  I’ve seen scrolling displays in Chinese, English, and Korean at Seoul Station, and the switching speed is so smooth. Here is a little trivia:​ ​Multi-language broadcast systems can now be controlled remotely​ ​, the headquarters computer room changed the subtitles, and the screens at global stations were updated simultaneously.

3. What parameters should you look at when choosing a good screen?

(Attention station administrators who are planning to buy a screen) There are many kinds of display screens on the market. Remember these three hard indicators:

1. ​​The refresh rate should not be lower than 1920Hz​​
   This number determines whether there is smear on the screen. Have you ever seen the interactive screen in an amusement park that changes patterns by clapping your hands? If the refresh rate is not enough, the photos taken will be full of ripples.

2. ​​Protection grade at least IP65​​
   In a place like a station, waterproofing and dustproofing are a must. There is a screen installed on an open-air platform that has not been wiped for three years and still displays normally. It uses military-grade sealing technology.

3. ​​The viewing angle should be wide enough​​
   A good screen does not discolor when viewed from the side. Last time I saw a screen with a 170-degree viewing angle in a stadium, the audience sitting at the very edge could also see the score clearly.

4. Hidden doorways for maintenance

(Is it done after installing the screen? Too naive) To tell the truth: the screen at a certain station developed color patches after half a year of use. When I took it apart, I found that the cooling fan was covered in dust. Pay attention to daily maintenance:

• Check the cooling system at least once a week
• A waterproof test must be done before the rainy season
• The software system should be upgraded regularly (this is the easiest to forget)

There is a counter-example. Because the monitoring screen of a station in the south has not been maintained for a long time, a scene of Xiaoqiang walking appeared in the live broadcast. This matter has been a hot search.

5. What black technology will be available at future stations?

(High energy warning ahead) Several new technologies that I have been eyeing recently:

1. ​​Transparent display​​
   It is completely invisible when installed in the glass curtain wall and lights up only when needed. Dubai Station is already trialling it. It is ordinary glass during the day and transforms into a navigation map at night.

2. ​​Flexible curved screen​​
   Say goodbye to the square and rigid shape, and wavy information columns may appear in the future. I heard that some manufacturers are making bendable LED modules that can be attached to pillars and turned.

3. ​​AR navigation screen​​
   Aim the phone camera at the screen and directly superimpose the 3D route guidance. If this became popular, it would probably save countless road warriors.

Personal opinion time: To be honest, the screens in many stations are still at the stage of "just light up". In fact, choosing the right screen can reduce the pressure of passengers’ inquiries by 30% and make the staff relaxed. Next time you see a station screen that is particularly clear and practical, maybe it uses a tape​ ​Intelligent light adjustment​ ​and​ ​Multi-system docking​ ​of high-end goods. Remember, a good screen is like a good tour guide, which can improve the operating efficiency of the entire station by more than one level!

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