OLED Panel Net-Shaped Current Supply Lines Reduce Cross-Talk
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Solution Overview
Problem
Organic electro luminescent display panels experience significant voltage drop and cross-talk issues, leading to non-uniform luminance and decreased performance, particularly when displaying large white blocks or images with varying gray scales.
Innovation Solution
The implementation of a display panel design featuring main current supply lines and auxiliary current supply lines arranged in a net shape to uniformize voltage distribution, with the auxiliary lines being substantially perpendicular to the main lines, and the use of switching and driving transistors to control current flow between the organic electro luminescent part and the current supply lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If current supply lines are arranged in parallel with data lines, then device complexity is reduced, but voltage drop increases causing non-uniform luminance
Solution Approach 1:
The patent transitions from a one-dimensional parallel arrangement of current supply lines to a two-dimensional net-shaped arrangement by introducing auxiliary current supply lines perpendicular to main current supply lines. This dimensional change enables uniform voltage distribution across the display panel while maintaining manageable device complexity through systematic layout.
Solution Approach 2:
The patent segments the current supply system into main current supply lines extending in the first direction and auxiliary current supply lines extending in the second direction. This segmentation divides the voltage distribution task across multiple orthogonal pathways, reducing the voltage drop in each individual line while achieving overall uniformity.
2Ease of manufacture
If current supply lines are arranged in parallel, then ease of manufacture is improved, but cross-talk between adjacent pixels increases
Solution Approach 1:
By adding auxiliary current supply lines in the perpendicular direction, the patent creates a two-dimensional net structure that isolates current paths for adjacent pixels. This orthogonal arrangement prevents lateral current leakage between pixels while maintaining manufacturing simplicity through standard photolithography processes.
Solution Approach 2:
The auxiliary current supply lines act as intermediaries that provide dedicated current pathways between main current supply lines and pixel electrodes. This intermediary structure channels current flow precisely to intended pixels, preventing cross-talk while preserving ease of manufacture through systematic routing.
3Device complexity
If simple parallel current supply lines are used, then device complexity is reduced, but luminance uniformity deteriorates
Solution Approach 1:
The patent segments the voltage distribution network into orthogonal main and auxiliary current supply lines. This segmentation creates multiple short current paths that maintain low resistance and uniform voltage delivery across the display panel, ensuring consistent luminance without excessive complexity.
Solution Approach 2:
The patent adds the second dimension by introducing auxiliary current supply lines perpendicular to main current supply lines. This two-dimensional net configuration ensures that every pixel is equidistant from voltage sources in both directions, achieving uniform luminance intensity while keeping the overall structure manageable.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration effectively reduces voltage drop and cross-talk, enhancing luminance uniformity and improving the display's ability to maintain consistent gray-scale representation across the panel.
Implementation Method 1
The OELD apparatus generates a light using an electro-luminescence of an organic material or polymers. When an electric energy is applied to the organic material or the polymers, the light is generated through the electro-luminescence.
Data Source
AI summary
In an OELD panel capable of decreasing a cross-talk and an OELD apparatus having the OELD panel, a switching part is formed in a unit pixel defined by a data line and a scan line to control the output of a data signal in response to a scan signal. A current supply line is disposed on at least two sides of the unit pixel to transfer a current. The sides of the unit pixel are disposed adjacent to one another. An organic electro luminescent part generates a light in response to the current. A driving part is disposed between the organic electro luminescent part and the current supply line to control the current in response to the data signal outputted from the switching part. Therefore, the current supply line forms a net shape to decrease a cross-talk.