Array Substrate Spare Element Defect Repair Mechanism
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Solution Overview
Problem
Defects such as bright dots and dark dots in liquid crystal displays due to foreign particles or manufacturing issues significantly affect the yield and quality of array substrates, making it difficult to achieve optimal product performance.
Innovation Solution
An array substrate design that includes a backplane with scanning and data lines, where pixel units are defined by intersecting lines, and a spare element is arranged between adjacent pixel electrodes to stride across the data line, allowing for insulated connection and defect repair by ensuring equal brightness between adjacent pixels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a repairing process is used to fix defects, then some defects can be repaired into normal dots, but dark dots still greatly affect the overall yield and quality
Solution Approach 1:
The patent applies preliminary action by pre-configuring spare elements (such as spare pixel electrodes or compensation circuits) during the manufacturing process before defects occur. These spare elements are positioned and prepared in advance so that when defects like dark dots are detected, the repair can be performed immediately by activating or connecting the pre-positioned spare elements, thereby improving both display quality and yield without requiring complex post-processing
Solution Approach 2:
The patent implements discarding and recovering by identifying defective pixel elements during manufacturing or operation, discarding them from normal function, and recovering the overall display performance by activating alternative pathways or spare elements. This allows the system to recover from defects and maintain high yield by converting failed elements into non-critical components while preserving display functionality through compensation mechanisms
2Reliability
If spare elements are added to repair defects, then both bright and dark dots can be repaired, but the device complexity increases
Solution Approach 1:
The patent applies universality by designing spare elements that can serve multiple functions and repair multiple types of defects. The spare pixel electrodes or compensation circuits are configured to handle both bright dots and dark dots through a unified repair mechanism, reducing the need for separate repair systems for different defect types and thereby limiting the increase in device complexity while maintaining comprehensive repair capability
Solution Approach 2:
The patent uses copying by creating simplified replica elements (spare pixel electrodes) that replicate the basic structure and function of normal pixel elements. These copied elements are easier to manufacture and integrate than complex repair mechanisms, allowing defect repair while minimizing additional structural complexity. The spare elements are essentially simplified copies that can be mass-produced and integrated without significantly increasing overall device complexity
3Reliability
If more repair mechanisms are implemented, then product performance improves, but the space occupied increases
Solution Approach 1:
The patent applies nested doll by integrating spare elements within the existing pixel structure and array substrate layout. The spare pixel electrodes are positioned in interstitial spaces or overlapping regions within the existing pixel array, nesting the repair functionality within the original structure rather than adding separate external repair components. This minimizes additional space occupation while maintaining comprehensive repair capability for both bright and dark dot defects
Data Source
AI summary
Disclosed are an array substrate, a display panel and a display apparatus. Two adjacent pixel electrodes of the array substrate are spaced from each other by a data line, and a spare element strides across the data line and is connected with at least one pixel electrode in an insulated manner.