Display Device Via Layer Groove Conductor Short Circuit Prevention
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Solution Overview
Problem
Display devices face short circuit issues due to direct contact of contact electrodes with the ends of light emitting elements, which affects electrical stability and efficiency.
Innovation Solution
A display device design featuring a concave groove in the via layer to house the light emitting element, with a conductor covering its ends and contact electrodes placed flat on the conductor to avoid direct contact, along with an insulating layer and anchor to enhance electrical connectivity and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If contact electrodes directly contact the ends of light emitting elements, then electrical connectivity is achieved, but short circuit issues occur affecting electrical stability
Solution Approach 1:
The patent introduces a conductor as an intermediary component between the contact electrode and the light emitting element. The conductor is positioned in the groove to cover the end of the light emitting element, while the contact electrode contacts the conductor instead of directly contacting the light emitting element. This intermediary structure prevents direct contact that causes short circuits while maintaining electrical connectivity through the conductor.
Solution Approach 2:
The patent utilizes a three-dimensional groove structure to separate the contact electrode and light emitting element in the vertical dimension. The groove provides depth separation, allowing the conductor to bridge the electrical connection while preventing lateral direct contact. This dimensional approach resolves the contradiction by spatially separating components that would otherwise be in direct contact.
2Reliability
If a conductor is introduced to cover the ends of light emitting elements, then short circuits are prevented, but device complexity increases
Solution Approach 1:
The conductor serves multiple functions simultaneously: it provides electrical connectivity between the contact electrode and light emitting element, prevents short circuits by covering the light emitting element end, and acts as a structural filler within the groove. This multi-functionality reduces the need for additional separate components, thereby limiting the increase in device complexity while achieving reliable short circuit prevention.
3Manufacturing precision
If the groove dimensions are increased to accommodate alignment, then manufacturing precision is improved, but device area increases
Solution Approach 1:
The groove is designed with specific local dimensions optimized for the light emitting element: the width is greater than the diameter of the light emitting element to allow alignment, while the depth is controlled to be greater than the diameter to provide sufficient coverage. This localized dimensional optimization ensures precise alignment without unnecessarily increasing the overall device area, as the groove is confined to the specific region where the light emitting element is positioned.
Data Source
AI summary
A display device includes a base layer; a via layer over the base layer, the via layer having a concave groove; a light emitting element in the groove; a first electrode over the via layer; a second electrode over the via layer and spaced from the first electrode; and an anchor over the light emitting element within the groove. A first conductor is in the groove and covers an end of the light emitting element.