Repair Lines and Multipath Power Lines for Display Defect Correction
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Solution Overview
Problem
Display devices, such as organic light emitting display devices, face challenges in repairing defects within their active areas, particularly disconnections in signal lines, which can lead to image quality deterioration and reduced yield due to RC delays.
Innovation Solution
The implementation of a display device structure that includes repair lines and multipath power lines within the active area, allowing for the formation of separation patterns and connection lines to reconnect disconnected signal lines, thereby facilitating easy repair of defects without significant image quality deterioration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If repair lines and multipath power lines are added within the active area, then ease of repair is improved, but device complexity increases
Solution Approach 1:
The patent implements repair lines and multipath power lines in advance within the active area during the manufacturing process. These repair structures are pre-positioned to enable future defect repairs without requiring external interventions, thereby improving ease of repair while containing complexity within the manufacturing stage
Solution Approach 2:
The patent utilizes the vertical dimension by implementing multipath power lines at different layers within the active area. This layered approach provides multiple electrical pathways through the vertical dimension, enabling repair capabilities without significantly increasing the horizontal footprint or overall device complexity
2Reliability
If connection lines are formed to reconnect disconnected signal lines, then reliability is improved, but manufacturing precision requirements increase
Solution Approach 1:
The repair lines are pre-formed during manufacturing with predetermined positions and configurations. This preliminary action ensures that when disconnections occur, the repair structures are already in place and only require activation, reducing the precision demands of the repair process itself while improving reliability
Solution Approach 2:
The patent introduces separation patterns as intermediary structures that mediate between the disconnected signal line segments and the repair lines. These separation patterns facilitate controlled electrical connections during repair while maintaining manufacturing precision through standardized design and positioning
3Productivity
If repair is performed within the active area, then productivity is improved, but device complexity increases
Solution Approach 1:
By pre-configuring repair lines and multipath power lines within the active area during manufacturing, the patent enables defects to be repaired without removing the device from production lines. This preliminary preparation significantly improves productivity and yield by allowing in-situ repairs, with the added complexity being managed through integrated design
Solution Approach 2:
The multipath power lines serve dual functions: normal power supply operation and defect repair pathways. This multi-functionality improves productivity by eliminating the need for separate repair infrastructure, as the same structures serve both operational and repair purposes, thereby managing complexity efficiently
Data Source
AI summary
A display device includes: a substrate comprising an active area; data lines extending in a first direction in the active area; scan lines extending in a second direction crossing the first direction in the active area; a plurality of repair lines extending in the first direction or in the second direction in the active area; and a multipath power line comprising a plurality of first wires in the active area and crossing the repair lines, and at least one second wire electrically connected to the first wires and extending in the active area to cross the first wires.