Multifunctional automatic detection device for LED / LCD display screen

By designing a multifunctional automatic testing device for LED/LCD displays, and utilizing components such as an STM32 microcontroller and an APS5000A frequency converter, the device achieves fully automated testing throughout the entire process. This solves the problems of low efficiency and high false negative rate in existing technologies, improves testing efficiency and accuracy, and enables product traceability and standardization.

CN224518092UActive Publication Date: 2026-07-17SHANXI NEW SUN TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
SHANXI NEW SUN TECH CO LTD
Filing Date
2025-08-11
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing LED/LCD display screen functional performance testing is inefficient, has a high rate of missed detections, and involves cumbersome processes. Manual testing is susceptible to fatigue and cannot achieve fully automated testing.

Method used

Design a multifunctional automatic testing device for LED/LCD displays, including testing equipment and frequency converter. It adopts components such as STM32 microcontroller, APS5000A programmable AC frequency converter, and high-definition network set-top box to realize fully automatic testing. It integrates voltage conversion, communication, storage and video interface functions, and supports electrical parameter, video interface testing and aging testing.

Benefits of technology

It achieves fully automated, zero-contact, and fully quantitative testing, improving testing efficiency and accuracy. The generated test reports can be electronically archived, increasing product traceability, shortening the testing cycle, and improving product standardization.

✦ Generated by Eureka AI based on patent content.

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    Figure CN224518092U_ABST
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Abstract

The utility model provides a kind of multifunctional automatic detection device of LED / LCD display screen belongs to display screen detection field;Solve the efficiency low, the problem such as high rate of omission, cumbersome process of existing LED / LCD display screen function performance detection;The device includes detection equipment and variable frequency power supply, and detection equipment includes shell, is provided with multiple communication interfaces, power input interface, multiple video interfaces, network port and touch screen on shell, main control panel and network set top box are integrated in shell, microcontroller, voltage conversion circuit, power output interface and SD card module are integrated on main control panel;Microcontroller is connected with the communication end of variable frequency power supply by one communication interface, and microcontroller is connected with touch screen by another communication interface;Network set top box is connected with the video interface of the LED / LCD display screen to be measured;The power output end of variable frequency power supply is connected with the power end of the LED / LCD display screen to be measured by power line;The utility model is applied to display screen.
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Claims

1. A multifunctional automatic detection device for LED / LCD displays, characterized in that: The system includes testing equipment and a frequency converter. The testing equipment includes a housing with multiple communication interfaces, a power input interface, multiple video interfaces, a network port, and a touch screen. The housing integrates a main control board and a network set-top box. The main control board integrates a microcontroller, a voltage conversion circuit, a power output interface, and an SD card module. The microcontroller is connected to the multiple communication interfaces and the SD card module via wires. The power input from the microcontroller's power input interface is output to the network set-top box's power supply through the voltage conversion module. The microcontroller's power output interface is connected to the network set-top box's power input terminal. The microcontroller is connected to the communication terminal of the frequency converter through one communication interface, the microcontroller is connected to the touch screen through another communication interface, and the microcontroller is connected to the network port of the LED / LCD display under test through the network port. The network set-top box is connected to the corresponding video interface of the LED / LCD display screen under test through multiple video interfaces; The power output terminal of the frequency converter is connected to the power terminal of the LED / LCD display screen under test via a power cable.

2. The multifunctional automatic detection device of LED / LCD display screen according to claim 1, characterized in that: Multiple communication interfaces include at least two RS232 interfaces, one of which is used to connect to the frequency converter power supply, and the other is used to connect to the touch screen.

3. The multifunctional automatic detection device of LED / LCD display screen according to claim 1, characterized in that: The multiple video interfaces include at least one DP interface and at least one HDMI interface, wherein the DP interface of the network set-top box is connected to the DP interface on the LED / LCD display under test via a corresponding cable, and the HDMI interface of the network set-top box is connected to the HDMI interface on the LED / LCD display under test via a corresponding cable.

4. The multifunctional automatic detection device for LED / LCD displays according to claim 1, characterized in that: The microcontroller uses a single-chip microcomputer, which integrates an RTC real-time clock function. It controls the output voltage of the frequency converter and collects power supply parameters through RS232 signals, while also controlling the video output signal of the network set-top box.

5. The multifunctional automatic detection device of LED / LCD display screen according to claim 4, characterized in that: The microcontroller used is an STM series microcontroller.

6. The multifunctional automatic detection device of LED / LCD display screen according to claim 1, characterized in that: The frequency converter uses the APS5000A programmable AC frequency converter.

7. The multifunctional automatic detection device of LED / LCD display screen according to claim 1, characterized in that: The SD card module uses an SD memory card to store testing process data and testing reports.

8. The multifunctional automatic detection device of LED / LCD display screen according to claim 7, characterized in that: The microcontroller is also connected to a memory chip, a flash chip, and a synchronous dynamic random access memory.