OLED Wiring Repair Using Adjacent Line Segmentation
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Solution Overview
Problem
The organic light emitting display (OLED) has a complex wiring structure, making it difficult to repair line defects, particularly short defects between wiring lines due to limited space and the need for precise reconnection.
Innovation Solution
A method and structure that utilize an adjacent wiring line to isolate and reconnect the defective wiring line by cutting the second wiring line and a third wiring line to form a repair pattern, ensuring electrical coupling and allowing for easy repair despite space constraints.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the wiring structure is made complex to achieve high brightness and color purity in OLED, then display performance is improved, but ease of repair deteriorates due to limited space and difficulty in accessing defective lines
Solution Approach 1:
The patent segments the wiring lines into isolated parts by cutting them at defect locations. The second wiring line is cut into first and second remaining parts, and the third wiring line is cut into first and second remaining parts. This segmentation isolates the defective portion (short between first and second wiring lines) from the functional portions, allowing repair without disrupting the entire wiring structure while maintaining the complex OLED display performance characteristics.
Solution Approach 2:
The patent introduces a repair pattern as an intermediary conductive structure that bridges the isolated parts of the second wiring line through the isolated part of the third wiring line. This repair pattern serves as a mediator to restore electrical connectivity between the segmented wiring portions without requiring direct access to the original defective connection point, thus overcoming the space constraints in complex OLED wiring structures.
2Manufacturing precision
If precise reconnection is required to repair short defects between wiring lines, then repair accuracy is improved, but ease of operation deteriorates due to the complexity and precision required in the repair process
Solution Approach 1:
By cutting the second and third wiring lines to create isolated parts, the patent transforms a precise reconnection task into a simpler connection task. The repair pattern connects to the isolated parts at predetermined locations away from the original short defect, reducing the precision requirement compared to directly reconnecting at the defective point while maintaining repair accuracy.
Solution Approach 2:
The patent performs preliminary cutting of the second and third wiring lines to create isolated parts before forming the repair pattern. This preliminary action prepares the wiring structure in advance, creating accessible connection points that simplify the subsequent repair operation and reduce the precision burden during the actual repair process.
3Reliability
If the second wiring line is cut to isolate the short defect, then reliability is improved by removing the defective portion, but ease of repair deteriorates due to the need to reconnect the isolated parts
Solution Approach 1:
The repair pattern acts as an intermediary that simplifies the reconnection process. Instead of directly reconnecting the first and second remaining parts of the second wiring line (which would require precise alignment at the defect location), the repair pattern connects these parts through the isolated part of the third wiring line, making the reconnection process easier while maintaining the reliability benefit of isolating the short defect.
Solution Approach 2:
The patent merges the repair function with the existing third wiring line structure. By using the isolated part of the third wiring line as part of the repair pathway, the solution combines the isolation benefit (removing the short defect from the circuit) with the reconnection function in a single integrated structure, rather than requiring separate isolation and reconnection operations.
Data Source
AI summary
A structure for repairing a line defect in which a short can be easily repaired using an adjacent wiring line despite limited repairing space and a method of repairing the defect are disclosed.