Display Device Electrode Insulating Portion Parasitic Current Prevention
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Solution Overview
Problem
Display devices face inefficiencies due to parasitic currents flowing between electrodes, which reduce emission efficiency and light output per unit area.
Innovation Solution
A display device design that includes an electrode insulating portion covering the electrode separation part and cut areas, preventing parasitic currents by overlapping specific layers and electrodes, and a method of fabricating this structure to enhance emission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If electrodes are placed close together to increase pixel density, then the area of the display device is improved, but parasitic currents flow between electrodes reducing emission efficiency
Solution Approach 1:
The electrode separation part divides the electrode structure into distinct segments, creating physical and insulating barriers between adjacent electrodes. This segmentation prevents parasitic current flow while maintaining compact electrode spacing for high pixel density.
Solution Approach 2:
The electrode separation part acts as an intermediary insulating structure between adjacent electrodes. This mediator prevents direct electrical contact and parasitic current flow while allowing the electrodes to remain in close proximity for high-resolution display.
2Loss of energy
If electrode separation parts are added to prevent parasitic currents, then emission efficiency is improved, but the device complexity increases
Solution Approach 1:
The electrode separation part is integrated with the insulating layer to form a unified structure. This merging reduces the number of discrete components and simplifies the overall device architecture while maintaining the function of preventing parasitic currents.
Solution Approach 2:
The electrode separation part serves multiple functions simultaneously: it provides electrical insulation between electrodes, defines pixel boundaries, and maintains structural integrity. This multi-functionality reduces the need for additional separate components.
Data Source
AI summary
A display device includes a first electrode extending in a first direction on a substrate, a second electrode disposed parallel to the first electrode on the substrate, a third electrode separated from the first electrode by an electrode separation part on the substrate, a first insulating layer on the first to third electrodes and being patterned to correspond to the electrode separation part, a first light-emitting element between the first and second electrodes on the first insulating layer, a second insulating layer on a part of the first light-emitting element and the first insulating layer and being patterned to correspond to the electrode separation part, an electrode insulating portion overlapping an end of each of the first and third electrodes facing each other separated by the electrode separation part, and a third insulating layer overlapping the second insulating layer and the electrode insulating portion.