Alas, dear bosses! Have you ever encountered such a tangle?
I want to install a display screen for the mall. I think it is quite high-end when I see the white LED screen, but I am afraid that I will buy it and use the wrong place. ； I spent a lot of money to install the equipment, but the reflection was severe during the day and the light was dazzling at night... Let's talk about how many tricks this seemingly ordinary white LED electronic screen hides?
1. First break three cognitive misunderstandings
Misunderstanding 1: Is the white screen used to advertise?
In fact, the display features of a white background are much more than advertising. For example, the hospital's number calling system uses a white screen, and the text contrast can reach 2000:1, which is 3 times clearer than the ordinary screen. The elderly can see the number calling information clearly between 20 meters.
Myth 2: The higher the brightness of the white screen, the better?
A big mistake! The brightness of the indoor white screen exceeds 1200cd/m², and the employee's eyes are sore after staring at it for half an hour. There was a shopping mall that suffered a loss - it installed a super bright screen, but the customer complained that it was like "turning on ten searchlights", and finally had to pay for the money to install a sunshade.
Myth 3: Is a white screen easy to make you look dirty?
Now the surface of high-end models has a nanocoated surface, and the coffee stains will fall off as soon as they are wiped. Actual measurement data shows that the cleaning frequency of screens with anti-fouling coating is 60% lower than that of ordinary models, and the maintenance cost is cut in half.
2. Five golden scenes, only the right place is worth
1. Transportation Hub Information Island
- The subway station transfer channel uses a P4 white screen, and the font number 8 can be clearly seen from 1 meter away
- Key data: Ambient light adaptive technology allows the screen to automatically adjust at 200-5000 lux illumination, reducing energy consumption by 40%.
- Real case: A high-speed rail station uses a white screen as a flight prompt, and the complaint rate of mistaken points has dropped by 23%.
2. Medical place clinic guide desk
- The registration window is equipped with a strip-shaped screen, the red characters are the most eye-catching on white background
- Special design: The antibacterial rate of medical-grade screen surface is 99.9%, suitable for environments where disinfectant water is frequently sprayed
- Hide function: can display the call voice waveform diagram synchronously, and hearing-impaired people can also obtain information
3. Electronic blackboard for educational institutions
- 86-inch 4K white screen replaces traditional blackboard, and dust pollution is directly returned to zero
- Tested data: Writing delay ≤8ms, 3 times faster than ordinary products on the market
- Eye protection tip: Built-in blue light peak offset technology, reduce eye fatigue by 57% for 4 hours of continuous use
4. Government Service Center
- Install horizontal dual screens in the service window, and the left process guides the right number call information
- Anti-dust design: The intelligent brightness sensor is automatically adjusted according to the number of people in the hall, and automatically enters the energy-saving mode when there are few people
- Operation and maintenance advantages: Support remote batch updates, complete 200 window content in 10 minutes
5. Industrial Control Board
- The workshop uses a high-protection white screen, which can withstand metal debris by IP65 dustproof and waterproof
- Special process: The hardness of the surface tempered glass reaches 9H, and the pass rate of the forklift impact test is 100%
- Data visualization: convert the device operation parameters into color block diagram, abnormal data will turn red alarm in 0.3 seconds
3. Purchase and avoid pitfalls, remember these three points
"Master, I can’t understand the parameter table! " Don't panic, grasp these three core indicators:
1. The grayscale level must be 16bit
- The 8bit screen displays a gray color with color blocks, and the 16bit screen can present a 65536-level gray level
- Test method: Play the sky gradient video, and pass directly when there is a fault.
2. The heat dissipation system depends on the material
- The aluminum alloy back plate heat dissipates 3 times faster than plastic, and the surface temperature difference in summer is 15℃
- Touch: After working for 2 hours, the screen frame with poor heat dissipation is hot
3. Choose smart power module
- The normal power supply load fluctuates >10% and will flash the screen
- Smart power supply can withstand ±20% voltage fluctuations, and can be used even if the rural power grid is unstable.
4. Common deadly operations for operation and maintenance
Death behavior 1: Rub the screen with alcohol
- Consequence: The nanocoating falls off in 3 months, and the maintenance fee is enough to buy half a new screen
- Correct posture: Special cleaner + microfiber cloth, rub it once a week enough
Death behavior 2: Don't turn off the machine 24 hours a day
- The truth: The white screen works continuously for more than 18 hours, and the attenuation speed of the lamp beads is 5 times faster
- Recommended: Turn off the machine for at least 4 hours a day, and the lifespan can be extended by 3-5 years.
Death behavior 3: Modify and distribute electricity by yourself
- Blood and tears case: An electrician in a shopping mall privately connected the circuit, causing the entire screen capacitor to explode
- Life-saving principle: You must contact the original factory for modification, don’t save any service fee
Editor's opinion: Now some manufacturers are blowing white screens to the fullest. In fact, the key is three points - grayscale performance, heat dissipation design, and power supply stability. Next time you go to the supplier for inspection, don’t just watch the demonstration video, and let others take apart the back cover and see the internal structure. The reliable manufacturer is the one who dares to let you see the real materials.
Finally, I would like to say that if you use the white screen correctly, it is a magic tool, but if you use it incorrectly, it is a money-burning machine. Remember one principle - scenes that require long-term display of static information and pursue ultra-high contrast, it is absolutely right to choose a white screen with your eyes closed!
