Display Device Five-Wire Resistance Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing display device assembly procedures face challenges in accurately detecting the resistance of flexible printed circuits, which is crucial for ensuring normal operation, and current methods are inefficient and prone to errors.
Innovation Solution
The display device incorporates a configuration of five wires on the driving circuit board, with specific convergence points on the electronic connector and circuit board, allowing for resistance detection using five probes that exclude the resistance of the display panel's wires, thereby enhancing detection accuracy and reducing the number of detection steps and errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional resistance detection methods are used for flexible printed circuits, then the detection can be performed, but the detection accuracy is low due to inclusion of display panel wire resistance and the detection process is complex requiring multiple steps
Solution Approach 1:
The patent extracts the resistance detection function from the complex assembly of display panel, flexible printed circuit, and driving circuit board. By designing five specific test wires with convergence points that isolate the flexible printed circuit resistance measurement from display panel wire resistance, the detection process extracts only the relevant resistance value, thereby improving measurement precision while simplifying the detection procedure to a single unified test.
2Reliability
If multiple detection steps are performed to check resistance of flexible printed circuit connecting to both display panel and driving circuit board, then comprehensive detection is achieved, but the total detection time and potential for errors increase
Solution Approach 1:
The patent merges multiple separate resistance detection steps into a single unified detection process. By configuring five test wires with specific convergence points on the flexible printed circuit, the system combines the detection of resistance between the display panel connection and the driving circuit board connection into one simultaneous measurement, maintaining comprehensive reliability while reducing detection time and minimizing error accumulation opportunities.
3Measurement precision
If traditional detection methods including display panel wire resistance are used, then all circuit resistances are measured, but the accuracy of flexible printed circuit resistance detection is compromised
Solution Approach 1:
The patent applies local quality by creating specific measurement zones through the five test wires with defined convergence points on the flexible printed circuit. This localized approach focuses the detection function specifically on measuring the resistance of the flexible printed circuit itself, excluding the display panel wire resistance from the measurement, thereby achieving high precision for the target component while maintaining the ability to detect comprehensive circuit integrity through the unified test structure.
Data Source
AI summary
A display device includes a display panel, a driving circuit board, and an electronic connector. The electronic connector connects the display panel and the driving circuit board. The driving circuit board is configured with a first wire, a second wire, a third wire, a fourth wire and a fifth wire arranged in order. The first wire, the second wire, the third wire and the fifth wire extend to the electronic connector and connect to the display panel. A first convergence point of the second wire and the third wire is located on the electronic connector, and a second convergence point of the fourth wire and the third wire is located on the driving circuit board. A detection method of the display device is also disclosed.