Display Panel Voltage Line Stacking for Low-Resistance Pixel Drive
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Solution Overview
Problem
Existing display panels face challenges in achieving improved display quality due to high resistance in voltage lines, which affect the performance and efficiency of pixel drive circuits.
Innovation Solution
The display panel incorporates a low-resistance circuit element in the voltage line, featuring a stacked and connected pattern structure with integral patterns, and includes light-blocking layers to enhance the efficiency of pixel drive circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional voltage lines are used in display panels, then the structure is simple and easy to manufacture, but the resistance is high which deteriorates display quality and pixel drive circuit performance
Solution Approach 1:
The voltage line is divided into multiple segments (first voltage line segment, second voltage line segment, third voltage line segment) arranged in a stacked pattern. Each segment is connected through contact holes, creating a multi-layer structure that reduces overall resistance while maintaining manufacturability through standard photolithography processes.
Solution Approach 2:
The voltage line structure transitions from a single-plane configuration to a multi-layer stacked configuration. By utilizing vertical stacking in the third dimension, the patent achieves lower resistance paths without increasing the horizontal footprint, thereby improving display quality without proportionally increasing device complexity.
2Productivity
If voltage lines with high resistance are used, then the manufacturing process is simple, but the performance and efficiency of pixel drive circuits deteriorate
Solution Approach 1:
Multiple voltage line segments are merged into a unified electrical pathway through conductive connections. The first, second, and third voltage line segments are electrically connected via contact holes, forming a continuous low-resistance path that enhances pixel drive circuit efficiency while using standard manufacturing techniques.
Solution Approach 2:
The voltage line structure employs composite construction with different conductive material layers. Each voltage line segment may utilize optimized conductive materials with lower resistance characteristics, and the stacked configuration creates a composite electrical pathway that achieves superior electrical performance.
Data Source
AI summary
A display panel includes a base layer, first to third pixels, data lines, a first voltage line that is connected to the first to third pixels and that extends in a second direction, and an initialization voltage line that is connected to the first to third pixels and that extends in the second direction. Each of the first to third pixels includes a light-emitting element including an anode, a first transistor that is connected between the first voltage line and the anode and that includes a gate electrode, a second transistor connected with a data line of the data lines, a third transistor that is connected between the initialization voltage line and a node and that includes a gate electrode, and a fourth transistor that is connected between the node and the anode and that includes a gate electrode connected with the first voltage line.