​​Have you ever experienced these scenarios? ​ ​
The newly purchased display failed but the model could not be reported. The original parameter document could not be found during maintenance. The professionalism was questioned by customers during project bidding... Data shows that 87% of users encountered model identification problems when they first came into contact with LED displays. This article will reveal the underlying logic of model query from the perspective of engineering practice.

1. Physical tag identification method: the most direct verification path

​​1. Module back decoding​​
Remove the back cover of the display and the metal bracket on the back of the module is usually engraved with the "PH+number" logo. For example, the label "PH6" means​ ​P6 model display​ ​, the digital unit corresponds to the pixel pitch millimeter value. This steel stamped logo has tamper-proof characteristics and is an important basis for project acceptance.

​​2. Control card traceability system​​
The control card located inside the box is labeled with an exclusive label, marked with core parameters such as the driver chip model and communication protocol version. Connecting the equipment through the control software provided by the manufacturer can automatically identify the control card model and supporting firmware information. This method is particularly suitable for fast operation and maintenance of rental screens.

2. Technical parameter calculation method: a way to break the deadlock without a label

​​1. Pixel spacing measurement method​​
Use a vernier caliper to measure the distance between the center point of adjacent lamp beads: if the distance is measured, it is​ ​P8 model​ ​, the error must be controlled within ±0.2mm. For the installed entire screen, the "minimum viewing distance = point spacing (mm) × 1000" formula can be used to verify - the optimal viewing distance of the P4 screen is 4 meters.

​​2. Resolution inversion model​​
Single module size (length × width) ÷ pixel pitch = module resolution. For example, if a module with 600mm×300mm is measured, if 150 lamp beads in the horizontal direction are measured, the dot spacing = 600÷150=4mm, and it is determined to be​ ​P4 model​ ​. This method needs to be used with the lamp bead counting tool.

3. Intelligent terminal diagnostics: the efficiency revolution in the digital era

​​1. Device Manager Traceability​​
Right-click on "Display Settings" - "Advanced Display Properties" in Windows system to read the manufacturer code and product serial number in the EDID information on the display. This method is suitable for project screen verification integrated with the control system.

​​2. Professional software analysis​​
Using hardware detection tools such as AIDA64, you can directly obtain the physical parameters of the display through the driver layer. In this way, a certain brand's P2.5 rental screen can recognize 3840Hz refresh rate and 256-level brightness adjustment data within 5 seconds.

4. Engineering file management: Make model query a system capability

It is recommended to establish a "three-code-in-one" archive system:

• ​​Physical tag code​ ​: Shooting module stamped archive
• ​​Control software code​ ​: Export the device identification code document
• ​​Project traceability code​ ​: Associate installation location and parameter list

After an international event venue adopts this system, the efficiency of replacing faulty parts has been increased by 60%, and the inventory turnover rate of spare parts has been increased by 35%.

​​Industry Insights​​
The essence of model identification is​ ​Mapping verification of technical parameters and physical entities​ ​. With the advancement of COB packaging technology, the display screen may be embedded in the future, and the mobile phone can read the complete parameters by touching it - this may completely change the industry's operation and maintenance logic.

for more product information and pricing, please contact us .