Compensation Pattern for Flat Insulating Layers in Display Devices
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Solution Overview
Problem
In display devices, the integration of scan drivers with the display panel can lead to uneven surfaces due to adjacent wires, resulting in grooves that affect the flatness of insulating layers and potentially cause short-circuits between metal wires, impacting the normal operation of drivers.
Innovation Solution
A display device structure that includes a compensation pattern made of a material with a different etching rate than the insulating layers, positioned in grooves between metal wires, ensures a flat upper surface and prevents short-circuits by maintaining the integrity of the insulating layers and metal wire configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If scan driver is integrated with display panel, then device complexity is reduced, but manufacturing precision deteriorates due to groove formation between adjacent wires
Solution Approach 1:
The compensation pattern is formed in advance during the manufacturing process, before the insulating layer is deposited. By pre-forming the compensation pattern in the groove between adjacent metal wires, the subsequent insulating layer can be deposited uniformly, ensuring flat upper surface without requiring additional post-processing steps.
Solution Approach 2:
The compensation pattern is selectively formed only in specific locations where grooves exist between adjacent metal wires, rather than uniformly across the entire substrate. This localized approach compensates for the uneven surface only where needed, maintaining manufacturing precision without adding unnecessary complexity to the overall structure.
2Area of stationary object
If adjacent metal wires are placed close together, then area is reduced, but reliability deteriorates due to potential short-circuits
Solution Approach 1:
The compensation pattern acts as an intermediary structure positioned between adjacent metal wires. It provides additional insulation and structural support in the groove region, preventing direct contact between adjacent wires and eliminating the short-circuit risk that would otherwise exist when wires are placed close together.
Solution Approach 2:
The compensation pattern is formed in advance to provide protective cushioning between adjacent metal wires. By pre-establishing this protective structure in the groove, the design anticipates and prevents potential short-circuit issues before they can occur during device operation.
Data Source
AI summary
A display device includes a substrate, first through fourth metal wires, first and second insulating layers, and a compensation pattern. The first metal wire is positioned on the substrate and extends in a first direction. The first insulating layer is positioned on the first metal wire and the substrate. The second metal wire is positioned on the first insulating layer, extends in the first direction, and is adjacent to the first metal wire. The second insulating layer is positioned on the first insulating layer and the second metal wire. The compensation pattern is positioned on the second insulating layer and is disposed between the first metal wire and the second metal wire. The third metal wire and the fourth metal wire are positioned on the second insulating layer and extend in a second direction that is different from the first direction.