Display Device Insulating Layers Prevent Power Scan Shorts
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Solution Overview
Problem
Existing display devices face challenges in preventing shorts between the power voltage line and the scan driving line, particularly at overlapping areas, which can lead to electrical failures and reduced device reliability.
Innovation Solution
A display device design that incorporates a substrate with scan stages, a first conductive layer including scan control lines, and organic insulating layers between the power voltage line and the scan stages, effectively suppressing or avoiding shorts by controlling the thickness of these insulating layers within specific ranges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the power voltage line and scan driving line are placed close to each other to reduce device area, then the area is reduced, but the risk of short circuit between the lines increases
Solution Approach 1:
An organic insulating layer is introduced as an intermediary substance between the power voltage line and scan driving line. This insulating layer physically separates the two conductive lines while allowing them to remain in close proximity, thereby preventing short circuits without significantly increasing the device area.
Solution Approach 2:
The patent employs a composite structure combining conductive materials (power voltage line, scan driving line) with an organic insulating material. This composite approach allows the conductive lines to be placed close together for area efficiency while the insulating material provides the necessary electrical isolation to prevent short circuits.
2Length of moving object
If the thickness of the organic insulating layer is reduced to minimize device thickness, then the device becomes thinner, but the insulation effectiveness decreases leading to potential shorts
Solution Approach 1:
The patent optimizes the thickness parameter of the organic insulating layer to a specific range that balances device thinness with insulation effectiveness. By carefully controlling this dimensional parameter, the design achieves minimal device thickness while maintaining sufficient insulation to prevent short circuits between the power voltage line and scan driving line.
Data Source
AI summary
A display device includes a substrate, one or more scan stages disposed on the substrate, a first conductive layer disposed on the substrate, and scan control lines electrically connected to each of the one or more scan stages, a first organic insulating layer disposed on the first conductive layer, and a second organic insulating layer disposed on the first organic insulating layer. The first organic insulating layer and the second organic insulating layer overlap the scan control lines.