Are newcomers who are new to LED screens often confused? What do merchants mean by P4 display points? Why are the prices for screens of the same size different by tens of thousands? Today we will break it down and talk about it, so that you won’t be fooled after reading it.

​​Understand the core concepts first​ ​: The "4" in P4 represents the pixel spacing of 4 mm. The smaller the number, the finer the picture. But here comes the point——​ ​The actual display effect depends on how many luminous points there are per square meter​ ​. To give a simple example, with the same P4 specifications, some products can reach 62,500 points/㎡, while those that cut corners may only have 50,000 points/㎡. This is how the price difference comes about.

​​Three common money traps​​

1. ​​Virtual scale density​ ​: Use the theoretical value of the module to pretend to be the actual points of the entire screen. After actual installation, the point spacing becomes wider.
2. ​​confusing standards​ ​: When using indoor screen standards to make outdoor screens, color blocks will appear when it rains.
3. ​​Hide falloff​ ​: The brightness is sufficient in the first year, but the point loss exceeds 20% in the second year.

Last year, a restaurant chain suffered a loss. After installing the 20㎡ P4 screen, it was found that the edges of the menu text were blurred. Later, the actual pixel density was found to be 15% less than the contracted value. This situation can be completely avoided by taking a bitmap with a mobile phone's macro lens during acceptance.

​​How to calculate your own needs? ​ ​
Here is a universal formula:
​​(Viewing distance (meters) x 1000) ÷ 8 = Suitable minimum number of points​​
For example, if the audience is 5 meters away from the screen: (5×1000)÷8=625, a configuration of ≥62,500 points/㎡ is sufficient. If choosing higher density is a waste of money, this algorithm can help you save at least 30% of your budget.

​​Parameter comparison and pit prevention guide​​

Special reminder​ ​Refresh rate parameters​ ​, many places now need to shoot videos to post on social media, and water ripples will appear when shooting on screens lower than 1920Hz. There is a quick test method: turn on the slow-motion mode (240 frames/second) of the mobile phone to take a picture of the screen. If the picture is smooth and streak-free, it is considered to be up to standard.

​​Frequently Asked Questions and Answers​​
Q: Will the higher the points, the more power consumption?
A: Not necessarily! High-end products now use​ ​Common cathode drive technology​ ​, the 62,500 dots/㎡ screen actually saves 40% of power than the old 50,000 dots screen.

Q: Can I increase my points after installation?
A: Don’t believe it! Later installation will lead to uneven brightness, just like bubbles in the film of a mobile phone, and the repair cost will be higher than replacing a new screen.

Q: How to judge whether the points stated by the manufacturer are true or false?
A: It is required to look at the "pixel composition" item in the third-party inspection report, or use a ruler on site to measure the number of lamp beads within a length of 10cm. The P4 standard should be an arrangement of 25 lamp beads.

A customer complained to me that buying a screen is more complicated than buying a car. In fact, just remember three keys:​ ​The viewing distance determines the density, the usage environment determines the protection level, and the operational requirements determine the refresh rate.​ ​. Some products on the market are now able to achieve a stitching error of 0.03%, which is particularly important for venues that require multi-screen splicing.

Finally, I would like to give you a hard-core suggestion: When signing the contract, be sure to state that "the pixel density error shall not exceed ±2%." When accepting the contract, bring a mobile APP that can measure illumination (such as Lux Meter) and measure the brightness difference in nine areas on site. Remember, the criteria for a good screen are just eight words——​ ​See clearly from a distance, see delicately up close​​。

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