Pixel Electrode Layout With Dummy Pattern Against Short-Circuiting
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Solution Overview
Problem
Current display devices face reliability issues due to potential short-circuiting between electrodes, which affects the performance and longevity of light emitting elements.
Innovation Solution
A display device design featuring a dummy pattern made of the same material as the second insulating layer, strategically located between the light emitting element and the electrodes, prevents short-circuiting by creating a gap that electrically and physically separates the electrodes, enhancing the reliability of the pixel structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If insulating layers are disposed above and below light emitting elements, then electrical insulation is improved, but short-circuiting between electrodes may occur due to space enclosure
Solution Approach 1:
A dummy pattern is introduced as an intermediary element between the first and second electrodes in the enclosed space. This dummy pattern acts as a mediator that prevents direct contact or short-circuiting between the electrodes while maintaining the insulating layer structure. The dummy pattern is positioned within the space enclosed by the light emitting element and insulating layer, serving as a protective barrier that eliminates the harmful short-circuiting effect without compromising the electrical insulation function.
2Stability of the object's composition
If space is enclosed by insulating layers around light emitting elements, then structural integrity is improved, but electrode short-circuiting is facilitated
Solution Approach 1:
The enclosed space between the light emitting element and insulating layer is segmented by introducing a dummy pattern. This segmentation divides the continuous enclosed space into separate regions, preventing the formation of a direct conductive path between the first and second electrodes. The dummy pattern creates physical separation within the enclosed space, maintaining structural integrity while ensuring electrode isolation by breaking the potential short-circuit path.
Data Source
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AI summary
A display device may include pixels on a substrate. Each of the pixels may include: a first alignment electrode and a second alignment electrode located on the substrate and spaced from each other; a first insulating layer on the first alignment electrode and the second alignment electrode; a light emitting element located on the first insulating layer between the first and second alignment electrodes; a dummy pattern located between the first insulating layer and the light emitting element; a second insulating layer located on the light emitting element and exposing first and second ends of the light emitting element; a first electrode electrically connected to the first end of the light emitting element; and a second electrode spaced from the first electrode, and electrically connected to the second end of the light emitting element. The dummy pattern may include the same material as the second insulating layer.