Display Panel Electrode Layout for Equal-Position LED Repair
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Solution Overview
Problem
Conventional pixel repair techniques for display panels, such as those using Micro LED and Mini LED, face challenges in achieving equal-position repair of non-light-emitting LEDs, particularly when the number of redundant positions is insufficient, leading to suboptimal repair effects.
Innovation Solution
The display panel incorporates multiple electrode groups with initial and redundant electrodes, where light-emitting devices are connected in series, and redundant electrodes are configured to receive specific electric potentials, allowing for the introduction of redundant light-emitting devices to replace failing ones, ensuring equal-position repair and enhanced repair effectiveness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If redundant positions are provided in the display panel to replace non-light-emitting LEDs, then the repair capability is improved, but the device complexity increases and the number of redundant positions is limited
Solution Approach 1:
The electrode group is designed to serve multiple functions: initially connecting normal light-emitting devices, and subsequently binding redundant light-emitting devices to repair defective positions. The same electrode structure (first electrode, intermediate electrode, second electrode) is reused for both initial and redundant connections, eliminating the need for separate redundant electrode structures and reducing overall device complexity.
Solution Approach 2:
The electrode group is pre-configured with initial electrodes (first, intermediate, second electrodes) that can subsequently be used to bind redundant light-emitting devices. The intermediate electrode is specifically designed to facilitate both initial connections and redundant connections, preparing the structure in advance for potential repairs without requiring additional complex wiring.
2Device complexity
If the quantity of redundant positions is smaller than the quantity of non-light-emitting LEDs, then the device complexity is reduced, but the repair effectiveness deteriorates
Solution Approach 1:
The electrode group configuration is made dynamic and adaptable. The same electrode group can be reconfigured to bind different numbers of redundant light-emitting devices based on the actual defect situation. The intermediate electrode can serve different roles: forming a first electrode pair with the first electrode, a second electrode pair with the second electrode, or a third electrode pair spanning both, allowing flexible adaptation to various repair scenarios.
Solution Approach 2:
The electrode group is segmented into multiple functional pairs: first electrode pair (first electrode + intermediate electrode), second electrode pair (second electrode + intermediate electrode), and third electrode pair (first electrode + second electrode). This segmentation allows the system to selectively activate different electrode pairs based on repair needs, enabling efficient use of limited redundant positions to address multiple defects.
3Ease of repair
If equal-position repair is implemented using redundant light-emitting devices, then the repair effectiveness is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The intermediate electrode is positioned locally between the first and second electrodes, creating distinct functional zones. The first electrode pair and second electrode pair can be independently configured to bind redundant light-emitting devices at specific positions, allowing precise local repair without affecting other regions. This local quality approach enables targeted repair while maintaining overall manufacturing feasibility.
Data Source
AI summary
A display panel, a method for repairing thereof, and a display device. The display panel includes multiple electrode groups including an initial electrode and a redundant electrode. The initial electrode includes a first electrode, an intermediate electrode and a second electrode, which form a first initial electrode pair and a second initial electrode pair. Light-emitting devices connected to the above initial electrode pairs are connected in series; the redundant electrode includes a first redundant electrode, an intermediate redundant electrode and a second redundant electrode, which form a first redundant electrode pair and a second redundant electrode pair; and/or, which form a third redundant electrode pair; the first redundant electrode and the first electrode have the same electric potential, the intermediate redundant electrode and the intermediate electrode have the same electric potential, and the second redundant electrode and the second electrode have the same electric potential.