Segmented Sub-Insulating Layers for LED Contact
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Solution Overview
Problem
Ultra-small LED elements with cylindrical shapes pose challenges in achieving effective contact with electrodes due to their geometry, leading to inadequate contact areas and alignment, which affects the performance of display devices.
Innovation Solution
The display device incorporates a substrate with first and second electrodes, sub-insulating layers, and light emitting elements arranged in a specific configuration, where the sub-insulating layers are thinner and spaced to facilitate better alignment and contact, with contact electrodes covering the light emitting elements to enhance contact areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If contact electrodes are arranged to cover the ultra-small LED elements, then the contact area should be improved, but the cylindrical shape of the elements prevents normal contact at the lower portions
Solution Approach 1:
The insulating layer is segmented into multiple first sub-insulating layers arranged in the second direction, creating gaps between them. These gaps allow contact electrodes to access and contact the lower portions of the cylindrical light emitting elements that would otherwise be inaccessible, thereby improving contact area without compromising alignment precision
Solution Approach 2:
The first sub-insulating layers act as intermediary structures that are selectively removed to create access paths. They mediate between the need for insulation and the need for contact, allowing contact electrodes to reach the lower portions of the light emitting elements through the gaps while maintaining overall structural integrity and alignment
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration improves the degree of alignment and contact areas of light emitting elements, reducing contact resistance and enhancing the performance of the display device by ensuring better electrical connectivity.
Implementation Method 1
Voltages with polarities opposite to each other are applied to the first electrode and the second electrode, so that a plurality of ultra-small LED elements are arranged toward the first electrode and the second electrode by electric fields formed in the first electrode and the second electrode
Data Source
AI summary
Provided is a display device including a substrate, a first electrode disposed on the substrate, a second electrode disposed on the substrate and spaced apart from the first electrode, a plurality of first sub-insulating layers extending in a first direction, disposed on the substrate and on the first and second electrodes, and arranged in a second direction crossing the first direction, and a plurality of light emitting elements disposed between the first sub-insulating layers and electrically connected to the first electrode and the second electrode.