Shielding Electrode Layout for Inorganic LED Alignment in Displays
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Solution Overview
Problem
Existing display devices face challenges in aligning inorganic light-emitting diodes (LEDs) effectively, leading to non-uniform emission and increased loss rates during manufacturing.
Innovation Solution
Incorporating a shielding electrode layer that does not overlap with the electrodes, allowing for selective alignment of inorganic LEDs in specific areas where an electric field is formed, thereby improving alignment and reducing loss rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a shielding electrode layer is disposed to overlap with the first electrode and second electrode, then the alignment of light-emitting elements is improved, but the emission uniformity deteriorates due to non-uniform electric field distribution
Solution Approach 1:
The shielding electrode layer is segmented into a first shielding electrode and a second shielding electrode that are spaced apart from each other. This segmentation allows the creation of distinct electric field regions, improving light-emitting element alignment in specific areas while maintaining emission uniformity in other areas where the electrodes do not overlap.
Solution Approach 2:
The shielding electrode layer is configured to overlap only specific portions of the first and second electrodes, creating local electric field enhancement in targeted areas. This local quality approach enables improved alignment where needed while preserving uniform emission in non-overlapping regions.
2Manufacturing precision
If the shielding electrode layer overlaps with the electrodes, then the alignment of inorganic LEDs is enhanced, but the loss rate during manufacturing increases
Solution Approach 1:
By segmenting the shielding electrode layer into separate first and second shielding electrodes with spacing between them, the patent creates controlled electric field regions that improve LED alignment precision, thereby reducing manufacturing loss rate through better placement accuracy.
Solution Approach 2:
The shielding electrode layer is disposed beforehand to create predetermined electric field patterns that guide the alignment of light-emitting elements during the manufacturing process, enabling more precise placement and reducing material loss.
3Manufacturing precision
If the shielding electrode layer is disposed to overlap with both electrodes, then the alignment control is improved, but the device complexity increases
Solution Approach 1:
The shielding electrode layer is divided into a first shielding electrode and a second shielding electrode spaced apart from each other. This segmentation provides effective alignment control through localized electric fields while maintaining relatively simple device structure by using discrete, separated electrode regions rather than continuous complex patterns.
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
The shielding electrode layer enhances the alignment of inorganic LEDs, resulting in improved emission uniformity and reduced loss rates in display devices.
Implementation Method 1
a shielding electrode layer disposed on the first insulating layer and disposed to not overlap at least portions of the first electrode and the second electrode
Data Source
AI summary
A display device is provided. The display device comprises: a first electrode and a second electrode spaced apart from and arranged to face the first electrode; a first insulating layer arranged to cover at least a partial region of the first and second electrodes; a shielding electrode layer which is arranged on the first insulating layer and which does not overlap at least a portion of the first and second electrodes; and at least one light-emitting element arranged between the first and second electrodes so as to be spaced apart from the shielding electrode layer, wherein the at least one light-emitting element can be arranged in a region in which the shielding electrode layer does not overlap the first and second electrodes.