Display Panel Test Circuit Shorting Bar Connection
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Solution Overview
Problem
Conventional display panel test circuits have a fixed volume due to the placement of holes between shorting bars and testing lines, leading to increased cost without reduced volume in integrated circuits.
Innovation Solution
A display panel with a test circuit comprising shorting bars, testing lines, a first isolation layer, a second isolation layer, and a conductive structure, where the second isolation layer has holes that penetrate to reduce the distance between shorting bars and testing lines, allowing for a more compact design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If holes are disposed between shorting bars and testing lines to electrically connect them, then electrical connection is achieved, but the distance between shorting bars is fixed and volume cannot be reduced
Solution Approach 1:
The patent introduces a vertical dimension by stacking conductive structures across multiple layers (first conductive layer, second conductive layer, third conductive layer) to connect shorting bars and testing lines. This multi-layer approach allows electrical connection without requiring horizontal space between components, thereby reducing the overall volume of the test circuit while maintaining functionality.
Solution Approach 2:
The patent implements nesting by placing conductive structures within isolation layers and embedding holes through multiple layers. The conductive structures are nested within the vertical stack of isolation layers, allowing compact integration of connection elements without increasing the footprint or volume of the test circuit.
2Volume of moving object
If fixed distance between shorting bars is maintained for proper hole placement, then manufacturing is simplified, but volume reduction is prevented
Solution Approach 1:
By transitioning from horizontal to vertical connectivity through multiple stacked layers, the patent eliminates the need for fixed horizontal distances between shorting bars. The vertical stacking allows flexible placement while maintaining manufacturing precision through standardized layer thicknesses and aligned hole patterns across layers.
Data Source
AI summary
A display panel comprising a substrate, a display array formed on the substrate, and a test circuit disposed on the substrate and comprising shorting bars, testing lines, a first and a second isolation layers, and a conductive structure. The shorting bars include a first short bar. The testing lines include a first testing line vertical with the first shorting bar and electrically connecting the display array. The first isolation layer is formed between the shorting bars and the testing lines. The second isolation layer is disposed on the shorting bars, the testing lines, and the first isolation layer and has a first and a second holes, which correspond to the first shorting bar. The second hole penetrates through the first isolation layer. The conductive structure is formed on the second isolation layer and electrically connects the first testing line and the first shorting bar through the first and second holes.