OLED Data Line Repair Structure With Shielding Line Access
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Solution Overview
Problem
Existing OLED display devices face challenges in repairing damaged data lines, which can lead to display defects and reduced performance.
Innovation Solution
The display device incorporates a repair electrode and shielding lines that overlap and connect to sub-data lines through holes in the passivation layer, allowing for the direct current power supply to the data lines, enabling repair and maintenance of damaged data lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If data lines are made to be replaceable/repairable, then reliability is improved, but device complexity increases
Solution Approach 1:
The data line is divided into multiple sub-data lines (first sub-data line and second sub-data line) that can be independently accessed and repaired. The shielding line is also segmented into sub-shielding lines corresponding to each sub-data line, enabling localized repair operations without affecting the entire data line structure.
Solution Approach 2:
A repair electrode is introduced as an intermediary component between the sub-data lines and the external repair circuitry. The repair electrode receives repair signals from outside the pixel and transmits them to the sub-data lines through the holes in the passivation layer, facilitating the repair process without directly exposing the data line structure.
2Ease of repair
If holes are created in the passivation layer for repair access, then ease of repair is improved, but protection against harmful factors deteriorates
Solution Approach 1:
The repair electrode serves as a mediator that accesses the sub-data lines through the holes in the passivation layer while maintaining electrical isolation. The repair electrode receives repair signals from outside and safely transmits them to the data lines without creating direct exposure pathways for harmful external interference.
Solution Approach 2:
The holes in the passivation layer are positioned and sized to provide localized access only where needed for repair operations, rather than creating widespread openings. The shielding lines are strategically placed to provide localized electromagnetic shielding around the holes and sub-data lines, protecting only the critical repair areas from external interference.
3Reliability
If shielding lines are added to protect data lines, then reliability is improved, but device complexity increases
Solution Approach 1:
The shielding function is merged with the existing data line structure by integrating sub-shielding lines that are electrically connected to the sub-data lines. The shielding lines are positioned to overlap with the data lines in the same layer, combining the shielding function with the existing conductive structure rather than adding completely separate shielding elements.
Solution Approach 2:
The shielding lines are positioned to provide localized electromagnetic shielding only in the regions where data lines are present and most vulnerable to interference. The shielding lines are strategically placed to overlap with the sub-data lines and are electrically connected only where needed, providing protection only to the critical areas rather than uniformly across the entire display structure.
Data Source
AI summary
The disclosure relates to a display device, and, to a display device and an electronic device capable of repairing data lines. A display device includes a data line disposed on a substrate; a passivation layer disposed on the data line; a via layer disposed on the passivation layer; a shielding line disposed on the via layer and overlapping the data line; a light-emitting element layer disposed on the shielding line; a first hole penetrating the via layer and overlapping a side of the data line; and a second hole penetrating the via layer and overlapping another side of the data line.