OLED Display Gate Wire Layering for Resolution and Quality
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Solution Overview
Problem
High-resolution OLED displays face issues such as wire distribution problems, voltage drop, and quality deterioration due to increased numbers of gate wires, data wires, and organic light emitting diodes, leading to reduced display quality.
Innovation Solution
The design includes a layered structure with non-overlapping first and second gate wires, separated scan and reset power lines, and a pixel circuit with multiple thin film transistors and capacitors, optimized insulation layers, and specific electrode configurations to enhance resolution and reduce wire overlap, thereby improving display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the numbers of gate wires, data wires, and organic light emitting diodes are increased to achieve high-resolution displays, then the display resolution is improved, but wire distribution problems and voltage drop occur leading to quality deterioration
Solution Approach 1:
The patent applies dimensionality change by transitioning from a single-layer gate wire structure to a multi-layer structure where gate wires are distributed across different layers. This spatial redistribution in the vertical dimension allows for better wire management, reduced overlap, and improved voltage distribution, thereby maintaining display quality while achieving high resolution
Solution Approach 2:
The gate wire system is segmented into multiple layers with different functions (first gate wires for scan signals, second gate wires for emission control). This segmentation allows independent optimization of each wire layer, reducing interference and voltage drop while supporting higher pixel densities
2Measurement precision
If more gate wires are provided to increase pixel density, then the display resolution is improved, but wire overlap and distribution problems occur
Solution Approach 1:
The patent resolves wire distribution complexity by utilizing multiple layers to accommodate gate wires. Instead of increasing wire density in a single plane which leads to overlap, the wires are distributed across different vertical layers, simplifying the two-dimensional layout problem while achieving higher pixel density
Solution Approach 2:
The gate wire function is segmented across two separate layers: first gate wires for scan signal transmission and second gate wires for emission control. This functional segmentation reduces wire overlap and simplifies routing complexity while enabling higher pixel density
3Measurement precision
If the number of organic light emitting diodes is increased to achieve high-resolution displays, then the display resolution is improved, but voltage drop in wires occurs
Solution Approach 1:
The multi-layer gate wire structure reduces voltage drop by distributing wires across different vertical levels, allowing for optimized current paths and reduced resistance. This spatial arrangement minimizes energy loss while supporting a higher number of OLEDs for high-resolution displays
Solution Approach 2:
By segmenting gate wires into functional layers (scan lines in first layer, emission control in second layer), the patent optimizes current distribution and reduces voltage drop across the display, enabling higher OLED density without significant energy loss
Data Source
AI summary
An organic light emitting diode display includes: first gate wires provided on a substrate with a first insulation layer therebetween and extended in a first direction; second gate wires provided on a second insulation layer above the first insulation layer and extended in the first direction; data wires provided on a third insulation layer above the second insulation layer and extended in a second direction crossing the first direction; a pixel circuit connected to the first gate wires, the second gate wires, and the data wires; and an organic light emitting diode connected to the pixel circuit.