Display Panel Inspection Terminals for Multi-Directional Gap Detection
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Solution Overview
Problem
Conventional methods for inspecting position gaps in liquid crystal display devices are inadequate, as they only detect defects in the line width direction and cannot determine defects in directions perpendicular to the line width, leading to potential short-circuiting issues and reduced operability during inspection.
Innovation Solution
A display device with conductive determination terminals and position gap detection lines on both the display panel and film-like substrate, allowing for inspection of position gaps in multiple directions, including perpendicular to the line width, to enhance defect detection accuracy and operability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional inspection method using single inspection terminal and inspection lead is used, then inspection process is simple, but position gaps in directions perpendicular to line width cannot be detected
Solution Approach 1:
The patent divides the inspection function into multiple independent terminals (first inspection terminal, second inspection terminal, third inspection terminal) and corresponding leads, allowing separate detection of position gaps in different directions. This segmentation enables comprehensive multi-directional inspection while maintaining operational simplicity through modular configuration.
Solution Approach 2:
The patent extends the inspection from one dimension (line width direction only) to multiple dimensions by adding inspection capabilities in directions perpendicular to the line width. The first, second, and third inspection terminals are positioned to detect position gaps in different spatial orientations, transforming the inspection system from single-dimensional to multi-dimensional detection.
2Reliability
If inspection terminals and leads are connected to inspect electrical conduction, then connection defects in line width direction can be detected, but short-circuiting defects in perpendicular directions remain undetected
Solution Approach 1:
The inspection terminal and lead configuration is designed to serve multiple functions: detecting position gaps in line width direction, detecting position gaps in perpendicular directions, and identifying both connection defects and short-circuiting defects. This multi-functional design enhances versatility while maintaining reliable detection capabilities across all defect types.
Solution Approach 2:
The patent introduces additional inspection terminals and leads as intermediary elements that mediate between the existing inspection system and the undetected defect types. These intermediaries enable detection of perpendicular position gaps and short-circuiting defects without disrupting the existing inspection methodology for line width direction defects.
3Manufacturing precision
If high positioning accuracy is required for smaller pitch between terminals, then connection quality improves, but position gaps are more likely to occur
Solution Approach 1:
The patent implements preliminary inspection using multiple terminals and leads to detect position gaps before they cause connection defects or short-circuiting. By performing pre-inspection in multiple directions, the system identifies potential issues arising from high-precision manufacturing variations, allowing corrective action before final assembly.
Solution Approach 2:
The multi-terminal inspection system provides feedback on position gaps in various directions, enabling real-time monitoring and adjustment of connection quality. The inspection results feed back into the manufacturing process, allowing optimization of terminal positioning to minimize connection defects while maintaining high positioning accuracy.
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 enables precise detection of connection and short-circuiting defects, improving the inspection process by allowing for the identification of position gaps in all relevant directions, thereby enhancing the operability and accuracy of the inspection of liquid crystal display panels.
Implementation Method 1
the electrical conduction between the inspection terminal and the inspection lead is inspected thus determining whether a connection defect attributed to a position gap is generated or not
Data Source
AI summary
The present invention can easily inspect the connection between a flexible printed circuit board and terminals. In a display device which includes a display panel which forms a plurality of lines as first lines on a terminal portion thereof, and a film-like substrate which forms a plurality of lines as second lines thereon, the display panel has a determination terminal which is arranged close to the terminal portion, has a width larger than a width of the terminal, and has a portion thereof removed, the film-like substrate forms third lines and fourth lines arranged close to the second lines thereon, the third lines face the determination terminal, and the fourth lines face the removed portion of the determination terminal from which the portion is removed.