OLED Time-Division Driving Circuit Layout for Aperture Ratio
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing time-divisional driving organic electroluminescence displays face a reduction in aperture ratio due to complex circuitry wiring, particularly in bottom emission devices where multiple lines are on the lower layer, leading to reduced signal transmission efficiency and increased power noise.
Innovation Solution
The power supply lines are arranged parallel to the data lines, allowing for a higher aperture ratio by simplifying the circuit layout and reducing the complexity of wiring, thereby enhancing signal transmission efficiency without compromising the power supply line width.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If multiple lines are arranged on the lower layer in bottom emission devices, then circuit connectivity is achieved, but aperture ratio is reduced
Solution Approach 1:
The patent transitions from arranging all lines on the lower layer to distributing lines across multiple layers. Specifically, data lines are positioned on the lower layer while power supply lines are positioned on the upper layer, utilizing the vertical dimension to resolve the conflict between circuit connectivity and aperture ratio. This dimensional redistribution allows both requirements to be satisfied simultaneously.
Solution Approach 2:
The patent segments the line arrangement by function and layer. Data lines and power supply lines are separated into different layers rather than being mixed on a single layer. This segmentation allows each line type to be optimized for its specific function while reducing overall wiring complexity and improving aperture ratio.
2Adaptability or versatility
If complex circuitry wiring is used, then all connections are achieved, but signal transmission efficiency is reduced
Solution Approach 1:
The patent merges the routing paths of data lines and power supply lines by positioning them parallel to each other on different layers. This merging of spatial arrangements simplifies the overall wiring structure, reduces the number of turns and intersections, and thereby improves signal transmission efficiency while maintaining all necessary connections.
Solution Approach 2:
By utilizing the vertical dimension to separate data lines and power supply lines onto different layers, the patent eliminates the need for complex planar routing. This dimensional approach straightens out the wiring paths and reduces signal path length, directly improving signal transmission efficiency.
3Area of stationary object
If power supply line width is narrowed, then aperture ratio is improved, but power noise increases
Solution Approach 1:
The patent resolves this contradiction by moving power supply lines to the upper layer, where they can maintain adequate width without compromising aperture ratio. The vertical separation allows power supply lines to be positioned where they occupy minimal planar space while still providing sufficient cross-sectional area for low-power-noise operation.
Solution Approach 2:
The patent applies different spatial characteristics to different line types. Power supply lines are positioned on the upper layer with optimized width for low power noise, while data lines occupy the lower layer. This local optimization of line dimensions based on functional requirements allows both aperture ratio and power noise performance to be improved simultaneously.
Data Source
AI summary
A time-divisional driving organic electroluminescence display in which a power supply line for supplying a power supply voltage is shared by two pixels coupled with the power supply line, and the power supply line is substantially parallel to and interposed between two data lines installed to drive the two pixels. Each pixel is arranged between a data line and the power supply line.