Metal Bridging Structures for Display Panel Voltage Uniformity
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Solution Overview
Problem
The resistance of transparent conductive materials in display panels is high, leading to low voltage uniformity across common electrode line patterns, which affects the performance of display devices.
Innovation Solution
A method is introduced where metal bridging structures with low resistance are formed between common electrode lines and connection blocks on either side of gate lines, reducing the resistance and improving voltage uniformity by electrically connecting them through via holes in an insulating layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If transparent conductive materials are used for common electrode line patterns, then the display panel can be manufactured with standard processes, but the resistance is high leading to low voltage uniformity
Solution Approach 1:
The patent uses a composite conductive structure combining transparent conductive material (for the common electrode line pattern) and metal material (for bridging structures). This composite approach allows the common electrode lines to maintain transparency while adding low-resistance metal bridges to improve voltage uniformity across the display panel.
Solution Approach 2:
The patent applies different material properties to different parts of the conductive system: transparent conductive material is used for the common electrode line patterns where transparency is needed, while metal material with low resistance is used for bridging structures where electrical connection is prioritized. This local differentiation resolves the contradiction between transparency and low resistance.
2Reliability
If metal bridging structures are added to improve voltage uniformity, then resistance is reduced and voltage uniformity is enhanced, but the device structure becomes more complex
Solution Approach 1:
The patent segments the conductive system into functionally distinct parts: common electrode line patterns made of transparent conductive material and bridging structures made of metal material. This segmentation allows each part to be optimized for its specific function while maintaining overall system performance.
Solution Approach 2:
The bridging structures act as intermediary elements that connect adjacent common electrode lines. These metal bridges serve as mediators to equalize voltage between different electrode lines, resolving the voltage uniformity issue without requiring complete redesign of the electrode system.
3Reliability
If via holes are formed through insulating layers to create metal bridging structures, then electrical connection is improved, but the manufacturing process becomes more complex
Solution Approach 1:
The patent forms via holes through the insulating layer before depositing the metal bridging structures. This preliminary action of creating the via holes in advance allows subsequent metal deposition to directly form the bridging structures in the correct positions, simplifying the overall manufacturing sequence.
Solution Approach 2:
The manufacturing process maintains continuity by forming via holes and then immediately depositing metal material to create bridging structures without interrupting the fabrication flow. This continuous process approach minimizes additional manufacturing steps while achieving the desired electrical connections.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution enhances voltage uniformity across the common electrode line pattern, improving the performance and reliability of display panels by reducing the risk of short circuits during repair processes.
Implementation Method 1
any of the bridging structures being electrically connected with a common electrode line and a common electrode connection block which are adjacent on two sides of one of the plurality of gate lines through the via hole
Data Source
AI summary
A method for manufacturing a display panel, a display panel, and a display device are provided. The method includes: forming a plurality of gate lines and a common electrode line pattern on a base substrate; forming an insulating layer on the base substrate on which the plurality of gate lines and the common electrode line pattern are formed; forming a via hole on the insulating layer; and forming a metal conductive pattern on the base substrate on which the insulating layer is formed. The common electrode line and the common electrode connection block located on two sides of a gate line are electrically connected through a bridging structure in a conductive layer made of metal, which reduces the resistance of the bridging structure, so that the voltage uniformity throughout the common electrode line pattern which is bridged through the bridging pattern is high.