Do newbies who are new to LED screens often encounter this situation? I always feel that the screen is not bright enough in broad daylight, and I feel that it is so dazzling that I cry at night. Don’t panic. Today we will talk about this headache-inducing brightness adjustment problem - this thing is like a novice learning to ride a bicycle. It’s actually very simple to master the trick!

1. First understand the underlying logic of brightness adjustment

You may not know,​​Brightness adjustment is not simply adjusting the light and darkness of the light bulb at all​​! It's actually three things to fight:​ ​Luminous intensity​​、​​Color accuracy​​and​​Electricity efficiency​​. Take a look at it. If the outdoor advertising screen is adjusted to a maximum of 4000cd/m² at noon, it will be so bright at night, and the electricity bill will scare you to shake your hands!

Here is an important point of knowledge:​​Low bright high gray technology​​. Now all high-end screens have this function, which can maintain the layering of the picture at low brightness. For example, some stage screens have brightness of only 800cd/m², but the dark details are clearer than those of ordinary 1200cd/m².

2. Teach you step by step to adjust the brightness

1. ​​Find the right control portal​​
   Don't flip around the screen menu! There are three regular adjustment channels:

• ​​Send card software​​(The program installed in the control computer)
• ​​Receive card dial switch​​(usually on the back of the screen, like the knob of an old radio frequency modulation)
• ​​Intelligent sensing module​​(The device with a photo sensor can be automatically adjusted, but the ambient light must be calibrated first)

The key point is:​​Do not use third-party software to adjust the screen with a refresh rate of 1920Hz​​! Previously, an old man insisted on using a certain audio and video software to tune it, but the screen was directly stuck to PPT, and the maintenance master shook his head when he saw it.

1. ​​Scene adjustment parameters​​
   | Use scenarios | Recommended brightness | Things to note |
   |----------|----------|----------|
   | Indoor conference room | 800-1000cd/m² | Turn off automatic dimming to avoid flashing and darkness when PPT turns pages |
   | Shopping mall windows | 1200-1500cd/m² | 10% reduction in brightness every 2 hours to prevent overheating |
   | Outdoor advertising | 4000-5000cd/m² | Rainy season will increase by 20% to offset the impact of water mist |

A tip to remember: Put a piece of A4 paper on the screen, and if you can still see the reflection on the paper clearly, it means that the brightness is appropriate. This method is more intuitive than any professional instrument!

3. The most common pitfalls for beginners

Q: Why does my brightness turn white after adjusting it?
A: Eighty times the gamma value is moved! To increase the brightness by 5%, you have to increase the contrast by 3%, which is the same as adding salt and soy sauce to the cooking.

Q: Will manual adjustment shorten the screen life?
A: Depend on the situation! If you adjust it more than ten times a day, the lamp beads will indeed prone to premature aging. But with​ ​Intelligent brightness adjustment​​The screen has a memory function, so just set the sunrise and sunset time, which is more worry-free than hiring an electrician.

There is a real case: A shopping mall’s Spring Festival event set the screen to its limit brightness, and a dark area appeared three days later. Later I found out that the heat dissipation could not keep up, so Dengzhu went on strike to protest!

4. Hidden skills for advanced players

1. ​​Test diagrams using grayscale​​
   When playing the 16th-order grayscale graph, if you can see the difference between the 1st and 15th-order, it means that the brightness is just right. This trick is much more effective than looking at the parameter table!

2. ​​Check the weather to determine the brightness​​
   On sunny days, the outdoor screen should be brighter 15%, but be careful - every time the temperature exceeds 35℃, the brighter 2% will be reduced by 1℃, otherwise the driver chip will show you the complexion in minutes.

3. ​​Regular calibration​​
   It is recommended to do full brightness detection every month: play the red, green, blue and white colors for half an hour to record the brightness attenuation. If the decline exceeds 8% within half a year, contact the after-sales service immediately!

It’s like adjusting the brightness, just like falling in love, you can’t be too enthusiastic or too cold. The key is to find the balance point that makes the eyes comfortable. Next time I encounter something that cannot be adjusted, remember this sentence:​ ​First look at the ambient light, then try the intermediate value, and finally fine-tune it to the eye-smoothing​​——Keeping is much more reliable than those metaphysical tutorials on the Internet!

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