Floating Electrode Display Layout for Light Leakage Control
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Solution Overview
Problem
Existing display devices face challenges with light leakage and alignment issues of light emitting elements due to electrical double layer expansion and AC electro-osmosis phenomena.
Innovation Solution
The display device design includes electrodes arranged on the same layer with a third electrode electrically separated from the first and second electrodes, forming floating lines to prevent electrical double layer expansion and mitigate light leakage, while maintaining excellent alignment of light emitting elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If electrical signals are provided to all electrodes for alignment, then light emitting element alignment is improved, but electrical double layer expansion occurs causing light leakage
Solution Approach 1:
The electrode structure is segmented into three distinct electrodes (first, second, and third electrodes) arranged on the same layer. The third electrode is electrically separated from the first and second electrodes, allowing independent control of electrical signals. This segmentation enables alignment signals to be applied only to the first and second electrodes without causing electrical double layer expansion that would occur if all electrodes were electrically connected.
Solution Approach 2:
The third electrode is extracted as a separate, electrically isolated component from the electrode system. By removing the electrical connection between the third electrode and the first/second electrodes, the harmful electrical double layer expansion is eliminated while the third electrode continues to provide structural support and alignment reference for the light emitting elements.
2Object-generated harmful factors
If floating lines are used to prevent electrical double layer expansion, then light leakage is reduced, but device complexity increases
Solution Approach 1:
The third electrode serves multiple functions simultaneously: it provides structural support, acts as an alignment reference for light emitting elements, and functions as a floating line to prevent electrical double layer expansion. By making the third electrode multi-functional, the patent reduces overall device complexity despite adding an additional electrode structure.
Solution Approach 2:
The patent merges the alignment function and the electrical isolation function into a unified electrode configuration. The first, second, and third electrodes work together as an integrated system where the third electrode's floating line structure combines structural support with electrical isolation, simplifying the overall design compared to using separate components for each function.
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 solution effectively prevents light leakage and improves alignment of light emitting elements by using floating electrodes, ensuring better electrical stability and reduced light leakage.
Implementation Method 1
light leakage and alignment issues of light emitting elements due to electrical double layer expansion and AC electro-osmosis phenomena
Implementation Method 2
light leakage and alignment issues of light emitting elements due to electrical double layer expansion and AC electro-osmosis phenomena
Implementation Method 3
aligning the light emitting element between the first electrode and the second electrode by forming an electric field between the first electrode and the second electrode
Implementation Method 4
the third electrode may include a reflective material, such that light provided to the third electrode is reflected in a display direction of the display device
Data Source
AI summary
A display device and a method of fabricating a display device are provided. A display device includes: a first electrode and a second electrode on a substrate and spaced apart from each other; a third electrode on the substrate; and a first light emitting element between the first electrode and the second electrode. The first electrode, the second electrode, and the third electrode may be arranged on a same layer. The third electrode may be electrically separated from the first electrode and the second electrode.