PCB Testing via Display Assembly Optical Feedback
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Solution Overview
Problem
Current methods for testing printed circuit boards, such as using multimeters and final test machines, are cumbersome, inefficient, and costly due to the need for specialized equipment for each type of board.
Innovation Solution
A device and system that includes a test board, display assembly, circuit unit, aligning portion, and pressing portion to align and press electrical contacts, allowing for easy electrical communication between the printed circuit board and a display assembly for qualitative testing based on normal display functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multimeter is used to test power signal voltage or current, then testing can be performed, but the process is cumbersome and inefficient
Solution Approach 1:
The patent replaces manual mechanical testing operations with an automated optical testing system. The display assembly serves as both the component under test and the testing instrument, using optical signals to automatically detect electrical connection status, thereby eliminating the need for manual multimeter operations and improving both efficiency and ease of operation.
Solution Approach 2:
The display assembly performs self-testing by using its own display functionality to detect electrical connections. The testing device integrates the display assembly with testing components, allowing the display to test itself through optical signal transmission and reception, thereby simplifying the testing process and improving operational ease.
2Reliability
If FT machine is used to check printed circuit board, then comprehensive testing is achieved, but high test costs are incurred due to needing special FT machine for each board type
Solution Approach 1:
The patent creates a universal testing device that can test multiple types of printed circuit boards using the same basic structure. The display assembly and testing components are designed to be adaptable to different board types, eliminating the need for specialized FT machines for each board type while maintaining comprehensive testing capability.
Solution Approach 2:
The patent uses the display assembly's own display functionality as a copy of the testing instrument. Instead of requiring separate specialized testing equipment for each board type, the display assembly itself serves as the testing device, copying its own functional characteristics to perform comprehensive testing across different board types.
3Measurement precision
If probes are inserted into test points to test voltage, then electrical connection can be tested, but the process is time-consuming and manual observation is required
Solution Approach 1:
The patent replaces manual probe insertion and visual observation with an automated optical detection system. The testing device uses optical signals to automatically detect electrical connections between the printed circuit board and display assembly, eliminating the need for manual probe handling and real-time visual monitoring, thereby reducing testing time while maintaining measurement precision.
Solution Approach 2:
The patent implements automatic feedback detection where the testing device monitors the electrical connection status through optical signal transmission and reception. The system provides real-time feedback on connection status without requiring manual observation, thereby reducing testing time while maintaining precise measurement of electrical connections.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution simplifies the testing process, reduces costs, and improves efficiency by allowing for quick determination of printed circuit board quality through normal display functionality, eliminating the need for manual observation and specialized equipment.
Implementation Method 1
the third electrical contact is electrically communicated with the display assembly via an electrically conductive adhesive
Implementation Method 2
The pressing portion is configured to press the second electrical contact, so that the second electrical contact is in contact with the first electrical contact
Data Source
AI summary
A device, a system, and a method for testing a PCB are provided. The PCB includes a first electrical contact and is applied to a display panel. The device includes a test board, a display assembly, a circuit unit, an aligning portion, and a pressing portion. The PCB and the display assembly are positioned on the test board. One end of the circuit unit defines a second electrical contact, and the other end of the circuit unit defines a third electrical contact. The aligning portion is configured to align the first and the second electrical contacts. The third electrical contact is electrically communicated with the display assembly via an electrically conductive adhesive. The pressing portion is configured to press the circuit unit, so that the second electrical contact is electrically connected with the first electrical contact and the display assembly is electrically communicated with the PCB.