Transparent Electrode Layout for High-PPI Display Panels
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Solution Overview
Problem
Conventional display panels for VR/AR devices face challenges in achieving high pixel resolution while maintaining a sufficient safety distance, which limits the product yield due to space constraints.
Innovation Solution
The display panel incorporates a substrate with a first metal layer, a metal oxide semiconductor layer, and two transparent conductive layers. The metal oxide semiconductor layer includes transparent active layers with first electrode conductor portions, which are electrically connected to first and second transparent electrodes through via holes, allowing for higher pixel density and resolution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the resolution of the display panel is improved, then the pixel density increases, but the safety distance cannot be ensured due to limited layout space
Solution Approach 1:
The patent transitions from a conventional single-layer transparent electrode structure to a multi-layer transparent electrode structure (first transparent conductive layer and second transparent conductive layer). This dimensional change in the electrode architecture allows for increased pixel density and resolution while maintaining adequate safety distances through the vertical stacking of layers, effectively resolving the contradiction between high resolution and limited layout space.
2Manufacturing precision
If the pixel resolution is increased beyond 1000-1500 PPI, then the display quality improves, but the product yield decreases due to safety distance constraints
Solution Approach 1:
The patent segments the transparent electrode function into multiple independent layers (first transparent conductive layer and second transparent conductive layer), each performing specific electrical connection functions. This segmentation allows for optimized pixel arrangement and reduced interference between adjacent pixels, enabling higher resolution manufacturing with improved yield by reducing the risk of defects affecting the entire panel.
3Reliability
If the transparent active layers are arranged in array with via hole connections, then the electrical connection reliability improves, but the manufacturing complexity increases
Solution Approach 1:
The patent combines the transparent active layer, via hole connections, and transparent electrode functions into an integrated multi-layer structure. The first and second transparent conductive layers are merged with the metal oxide semiconductor layer to form a unified thin-film transistor structure, where the via holes serve dual purposes as both connection channels and alignment features, thereby improving reliability while managing manufacturing complexity.
Data Source
AI summary
A display panel has a display area, and in the display area the display panel includes multiple transparent active layers. Two first electrode conductor portions respectively in any two adjacent transparent active layers are electrically connected to a first transparent electrode and a second transparent electrode by via hole connections, respectively. The first transparent electrode and the second transparent electrode are disposed respectively in different layers insulated from each other.