Storage Capacitor Electrode Integration for High-Resolution Displays
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Solution Overview
Problem
The increasing demand for high-resolution display panels with smaller pixel sizes and more complex circuit structures poses challenges in manufacturing efficient and high-resolution display devices, particularly in reducing the structural complexity and spatial limitations of components like storage capacitors.
Innovation Solution
The display device incorporates a scan line, data line, driving voltage line, transistors, a light emitting element, and a storage capacitor with a specific electrode configuration and insulating layers to reduce structural complexity and enhance resolution, including a unique configuration for the storage capacitor where the upper and lower electrodes do not overlap, allowing for increased capacitance and simplified manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the pixel size is decreased to increase resolution, then the display resolution is improved, but the structural complexity and spatial limitations of components increase
Solution Approach 1:
The storage capacitor electrode is merged with the auxiliary power source line, allowing the same conductive structure to serve dual functions: providing power to the light emitting element and serving as one electrode of the storage capacitor. This integration reduces the number of separate components and simplifies the overall pixel structure while maintaining high resolution.
Solution Approach 2:
The auxiliary power source line is designed to perform multiple functions simultaneously: it acts as a power supply line for the light emitting element, serves as one electrode of the storage capacitor, and provides electrical connection through the insulating layers. This multi-functionality reduces component count and structural complexity in small-pixel high-resolution displays.
2Ease of manufacture
If the storage capacitor electrode configuration is simplified to reduce manufacturing complexity, then the manufacturing process is improved, but the capacitance may be reduced
Solution Approach 1:
The storage capacitor structure is nested within the existing power source line architecture. The auxiliary power source line serves as the lower electrode, the first insulating layer contains the dielectric, and the upper electrode is formed above it, creating a nested configuration that integrates seamlessly into the manufacturing process without requiring separate capacitor fabrication steps.
Solution Approach 2:
The storage capacitor is formed by utilizing the vertical stacking of insulating layers rather than requiring lateral expansion. The lower electrode extends in the plane of the auxiliary power source line, while the upper electrode is positioned in a higher dimensional layer, separated by the first insulating layer, creating capacitance through vertical stratification rather than horizontal arrangement.
Data Source
AI summary
A display device includes a scan line extending primarily in a first direction, disposed on a substrate, and transmitting a scan signal, a data line extending primarily in a second direction intersecting the first direction and transmitting a data signal, a driving voltage line extending primarily in the second direction and transmitting a driving voltage, a plurality of transistors including first and second transistors, wherein the second transistor is connected to the scan line and the data line, and the first transistor is connected to the second transistor, a light emitting element connected to the plurality of transistors, and a storage capacitor disposed between the substrate and an active pattern of the first transistor, the storage capacitor including a first electrode disposed on the substrate and a second electrode at least partially overlapping the first electrode. A first insulating layer is disposed between the first and second electrodes.