Stacked Connection Electrode Layout for Uniform Flexible Displays
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Solution Overview
Problem
In display apparatuses, such as organic light-emitting displays, the quality of images degrades when the area occupied by drivers and peripheral components is large or reduced, leading to potential image quality issues.
Innovation Solution
The display apparatus incorporates a first and second connection electrode layer with horizontal and vertical connection lines, a driving voltage line with protrusions, and a semiconductor layer configuration that includes oxide semiconductor materials to optimize signal transmission and reduce structural differences between pixels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the area occupied by drivers and peripheral components is increased, then the image quality degrades due to larger non-display area, but reducing the area leads to insufficient space for proper signal transmission and voltage supply
Solution Approach 1:
The patent transitions from a conventional planar layout to a three-dimensional stacked architecture. Connection electrodes are arranged in multiple layers (first connection electrode layer, second connection electrode layer) with vertical stacking, allowing signal transmission paths to extend in the vertical dimension rather than only horizontally. This enables compact driver region area while maintaining adequate signal transmission length and quality.
Solution Approach 2:
The connection electrode system is divided into multiple functional layers: first connection electrodes for initial signal distribution, second connection electrodes for further distribution, and protrusion structures for vertical inter-layer connectivity. This segmentation allows each layer to perform specific functions efficiently, optimizing both space utilization and signal transmission within the driver region.
2Device complexity
If conventional connection electrode layouts are used, then the structure is simple, but brightness variations occur across different pixels due to unequal voltage supply
Solution Approach 1:
The connection electrode system implements local quality optimization through protrusion structures that extend from the first connection electrode layer to the second connection electrode layer. These protrusions are strategically positioned to ensure equal potential distribution to each pixel region. The structure creates localized voltage supply points that compensate for distance variations, ensuring uniform brightness across all pixels despite different positions in the display panel.
3Adaptability or versatility
If flexible substrates are used to enable bending, then adaptability improves, but structural integrity and image quality may be compromised
Solution Approach 1:
The stacked connection electrode architecture distributes structural stress across multiple layers rather than concentrating it in a single plane. The vertical stacking provides structural reinforcement that maintains electrical connectivity and signal transmission integrity even when the flexible substrate is bent, preserving image quality while enabling flexibility.
Data Source
AI summary
A display apparatus includes: a first connection electrode layer on a substrate and comprising a horizontal connection line extending in a first direction; and a second connection electrode layer on the first connection electrode layer, comprising a vertical connection line extending in a second direction crossing the first direction and a driving voltage line extending in the second direction, the driving voltage line comprising a protrusion overlapping the horizontal connection line.