Display Substrate Side Wiring Isolation With Blocking Wall
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Solution Overview
Problem
The existing Micro/Mini LED display technology faces challenges in manufacturing large-sized display substrates due to limitations in transferring technology, requiring splicing of small-sized LED display substrates, which can lead to short circuits and yield issues during the formation of side wirings.
Innovation Solution
A display substrate design with a base having a display area and an epitaxial area, featuring a driving functional layer, binding electrodes, and a blocking wall that prevents metal ions from entering the display area during the formation of side wirings, ensuring electrical isolation and preventing short circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If small-sized LED display substrates are spliced to form large-sized display substrates, then the display substrate size can be increased, but the risk of short circuits and yield issues increases during side wiring formation
Solution Approach 1:
A blocking wall structure is introduced as an intermediary element between adjacent binding electrodes. This blocking wall prevents metal ions from migrating between electrodes during the side wiring formation process, thereby eliminating short circuit risks while allowing large-sized substrates to be manufactured through splicing.
Solution Approach 2:
The blocking wall is formed in advance before the side wiring formation process. By pre-establishing this protective structure, the patent prevents potential short circuits before they can occur during subsequent manufacturing steps, ensuring high yield in large-sized substrate production.
2Reliability
If side wirings are formed to electrically couple binding electrodes, then electrical connectivity is achieved, but metal ion contamination can cause short circuits between adjacent electrodes
Solution Approach 1:
The blocking wall serves as a protective intermediary that allows electrical connectivity to be achieved through side wirings while simultaneously blocking the harmful migration of metal ions between adjacent binding electrodes during the formation process.
3Reliability
If blocking wall is added to prevent metal ion migration, then short circuit risk is reduced, but device complexity increases
Solution Approach 1:
The blocking wall is strategically positioned only in the critical regions where metal ion migration could cause short circuits, specifically between adjacent binding electrodes. This localized approach provides effective protection without unnecessarily complicating the overall device structure.
Data Source
AI summary
A display substrate, a method for manufacturing a display substrate and a display device are provided, and the display substrate includes: a base having a first surface, a second surface and a side surface, the base includes a display area and an epitaxial area; a driving functional layer in the display area and first binding electrodes in the epitaxial area on the first surface, the first binding electrodes are coupled with the driving functional layer; second binding electrodes located on the second surface and coupled with the first binding electrodes through side wirings; a portion of each side wiring is located on the side surface; a blocking wall on the first surface and in the epitaxial area, an orthographic projection of the blocking wall on the base at least passes through spacing regions between every two adjacent first binding electrodes along an arrangement direction of the first binding electrodes.