Display Panel Initialization Voltage Mesh for Line Defect Prevention
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Solution Overview
Problem
Existing display panels face challenges in ensuring reliable and high-quality performance due to insufficient initialization voltage distribution, leading to issues such as visible horizontal lines and reduced reliability.
Innovation Solution
The display panel design incorporates a mesh-shaped configuration of initialization voltage lines, including both upper and lower initialization voltage lines, connected via a connection line with multiple contact holes, to ensure efficient voltage application and reduce resistance, thereby enhancing reliability and quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single initialization voltage line is used, then the device complexity is low, but the voltage distribution is insufficient leading to visible horizontal lines and reduced reliability
Solution Approach 1:
The initialization voltage line is segmented into multiple lines (first initialization voltage line and second initialization voltage line) positioned at different locations. This segmentation allows voltage to be distributed through multiple pathways, improving voltage uniformity and eliminating horizontal line defects while maintaining manageable complexity through systematic arrangement.
Solution Approach 2:
The patent transitions from a single-plane voltage line to a multi-dimensional configuration by placing initialization voltage lines at different vertical positions (first and second initialization voltage lines) and horizontal positions. This spatial distribution across multiple dimensions ensures comprehensive voltage coverage and eliminates dead zones that cause display defects.
2Reliability
If the initialization voltage line extends in one direction only, then the manufacturing process is simple, but the voltage distribution coverage is insufficient
Solution Approach 1:
The first and second initialization voltage lines are configured with different extending directions and positions, creating an asymmetric layout. This asymmetric arrangement optimizes voltage distribution coverage across the display panel by targeting different regional requirements, ensuring comprehensive coverage while following a systematic design that facilitates manufacturing.
Data Source
AI summary
A display panel includes a substrate in which a display area including a pixel area and a peripheral area surrounding at least a part of the display area are defined, a first thin-film transistor disposed in the pixel area, where the first thin-film transistor includes a first semiconductor layer and a first gate electrode overlapping the first semiconductor layer, an initialization voltage line disposed on the first thin-film transistor and extending in a first direction, and a lower initialization voltage line disposed under the first thin-film transistor, extending in a second direction crossing the first direction and electrically connected to the initialization voltage line.