Display Panel Repair Line Design for Short Circuit Bypass
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Solution Overview
Problem
In the manufacturing of display panels, short circuits often occur due to poor film formation or conductive particles in overlapping areas of data lines, scanning lines, and common electrodes, leading to reduced yield and increased costs.
Innovation Solution
Incorporating repair lines with specific repair points that overlap with data lines, allowing for electrical connection and cutting off short-circuited areas to restore normal operation, and forming non-conductive breakpoints between overlapping areas to bypass the short-circuited sections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If data lines and scanning lines overlap to form overlapping areas, then the display panel can be manufactured with standard routing, but short circuits occur due to poor film formation or conductive particles
Solution Approach 1:
An insulation layer is introduced as an intermediary between the data line and scanning line in overlapping areas. This insulation layer acts as a mediator that prevents direct electrical contact between the two conductive lines, thereby eliminating short circuits while allowing the lines to maintain their overlapping geometric configuration for manufacturing efficiency.
Solution Approach 2:
The overlapping area between data lines and scanning lines is segmented into distinct functional zones by introducing insulation layers. The insulation layer divides the overlapping region into a first overlapping area (data line with common line) and a second overlapping area (data line with scanning line), preventing harmful electrical interactions while maintaining structural integrity.
2Productivity
If repair lines are added to repair short circuits, then yield is improved, but device complexity increases
Solution Approach 1:
The repair line is designed to perform multiple functions: it serves as a normal data transmission line during regular operation and simultaneously acts as a repair pathway when short circuits occur. By making the repair line multi-functional, the patent avoids adding separate dedicated repair structures, thereby improving yield without proportionally increasing device complexity.
Solution Approach 2:
The repair line is pre-configured with insulation layers and positioning structures during manufacturing, so that it is ready to function as a repair pathway before any short circuits occur. This preliminary preparation allows for quick repair activation without requiring complex post-manufacturing modifications or additional structural elements.
Data Source
AI summary
The present application discloses a display panel, a repair method for the display panel and a display device, where a repair line includes a first repair point, a second repair point and a third repair point which overlap with a data line, the first repair point is located on a side of a first overlapping area away from the second repair point, the second repair point is located between the first overlapping area and a second overlapping area, and the third repair point is located on a side of the second overlapping area away from the second repair point.