Display Panel Common Electrode Opaque Region Crosstalk Shielding
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Solution Overview
Problem
High-resolution display panels face challenges with pixel crosstalk due to reduced pixel pitch, which is typically addressed by increasing the width of the black matrix, but this reduces the opening region of the pixel, leading to decreased brightness.
Innovation Solution
A display panel design that includes a common electrode with at least a partial opaque region to shield crosstalk boundaries and a reflection layer to enhance light emission efficiency, while maintaining suitable widths for the opaque region and reflection layer to balance brightness and transmittance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the width of the black matrix is increased to cover crosstalk positions, then pixel crosstalk is reduced, but the area of the opening region of the pixel is reduced, causing decreased overall brightness
Solution Approach 1:
The common electrode is segmented into transparent and opaque regions, with the opaque region specifically positioned to block crosstalk between adjacent pixels while the transparent region allows light transmission. This segmentation enables selective blocking of harmful light paths without sacrificing overall pixel brightness area.
Solution Approach 2:
The common electrode exhibits local quality variation through its transparent and opaque regions. The opaque region is locally positioned at boundaries where crosstalk occurs, while other regions remain transparent to maintain brightness. This local differentiation allows targeted crosstalk suppression without global brightness reduction.
2Object-affected harmful factors
If the width of the black matrix is increased to cover crosstalk positions, then pixel crosstalk is reduced, but the opening region area is reduced
Solution Approach 1:
The common electrode is divided into transparent and opaque segments, with the opaque segment strategically positioned only where crosstalk occurs at pixel boundaries. This segmentation allows crosstalk blocking without requiring a uniformly wide black matrix that would reduce the overall opening region area.
Solution Approach 2:
The opaque region of the common electrode acts as an intermediary element that blocks crosstalk light paths between pixels without requiring physical expansion of the black matrix. This intermediary structure achieves crosstalk suppression while preserving the opening region area.
3Object-affected harmful factors
If the common electrode includes opaque regions to shield crosstalk, then crosstalk is reduced, but light transmission may be affected
Solution Approach 1:
The common electrode is segmented into transparent and opaque regions, allowing light transmission through the transparent portions while blocking crosstalk through the opaque portions. This segmentation minimizes energy loss by ensuring that opaque regions are positioned only where crosstalk occurs, not across the entire electrode area.
Solution Approach 2:
The common electrode exhibits local quality variation with transparent and opaque regions positioned according to their specific functions. The opaque region is locally placed at crosstalk-prone boundaries, while other regions remain transparent for optimal light transmission, thus minimizing overall energy loss.
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 reduces pixel crosstalk and improves light emission efficiency, maintaining brightness while ensuring adequate transmittance, thus addressing the limitations of existing technologies.
Implementation Method 1
a reflection layer, located between the first base substrate and the driving layer; where the reflection layer includes a plurality of openings for exposing the pixel electrodes
Implementation Method 2
at least a partial region of the common electrode is opaque
Data Source
AI summary
A display panel includes a first base substrate, a driving layer, a plurality of pixel electrodes, a common electrode, and a reflection layer. The driving layer is at a side of the first base substrate. The pixel electrodes are at a side of the driving layer away from the first base substrate and are electrically connected with the driving layer. The common electrode is at a side of the pixel electrodes away from the driving layer, is insulated from the pixel electrodes, and includes a plurality of openings for exposing the pixel electrodes. At least a partial region of the common electrode is opaque. The reflective layer is between the first base substrate and the driving layer and includes a plurality of openings for exposing the pixel electrodes.