Pixel Electrode Layout With Insulated Floating Pattern Isolation
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Solution Overview
Problem
Existing display devices face challenges in achieving reliable pixel performance due to issues such as short-circuiting and reduced emission efficiency, particularly in the alignment of electrodes and floating patterns.
Innovation Solution
The implementation of a pixel structure with a core-shell light emitting element design, including a first and second semiconductor layer with an active layer in between, surrounded by an insulating layer, and connected by contact electrodes, enhances reliability and emission efficiency by preventing short-circuits and improving light transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If alignment electrodes and floating patterns are used in the pixel structure, then emission efficiency is improved, but short-circuiting between electrodes occurs reducing reliability
Solution Approach 1:
An insulating layer is introduced as an intermediary between the alignment electrode and floating pattern to prevent direct contact and short-circuiting. This insulating barrier allows the electrodes to maintain their functional proximity for efficient light emission while eliminating the harmful electrical connection that causes short-circuits.
Solution Approach 2:
The pixel structure is segmented into distinct functional layers with the insulating layer separating the conductive elements. By dividing the structure into electrically isolated segments (alignment electrode, insulating layer, floating pattern), the design maintains emission efficiency while preventing harmful electrical interactions between adjacent components.
2Illumination intensity
If electrode alignment is optimized for emission efficiency, then light transmission improves, but structural complexity increases
Solution Approach 1:
The alignment electrode and floating pattern are merged into a unified structure where the floating pattern extends from the alignment electrode. This integration simplifies the overall device complexity by reducing the number of separate components while maintaining optimized electrode alignment for high light transmission efficiency.
Solution Approach 2:
The floating pattern serves multiple functions: it extends the alignment electrode structure, provides additional conductive pathways, and maintains structural integrity. This multi-functionality reduces the need for separate components, thereby simplifying the overall structure while preserving optimized light transmission characteristics.
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 proposed pixel structure improves reliability and emission efficiency by minimizing short-circuits and optimizing light emission, thereby enhancing the overall performance of display devices.
Implementation Method 1
a light emitting element LD disposed between the first alignment electrode and the second alignment electrode
Data Source
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AI summary
A pixel may include a first sub-pixel, a third sub-pixel, and a second sub-pixel that are arranged in a second direction and each include an emission area and a non-emission area. Each of the first, second, and third sub-pixels may include: a pixel circuit layer including a passivation layer including first to third via holes; a first alignment electrode disposed on the passivation layer; a second alignment electrode spaced apart from the first alignment electrode; a floating pattern spaced apart from the first alignment electrode; a light emitting element disposed between the first alignment electrode and the second alignment electrode. A first via hole of the first sub-pixel, a first via hole of the third sub-pixel, and a first via hole of the second sub-pixel may be positioned in a same column.