Branch Line Power Distribution for AMOLED Uniformity
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Solution Overview
Problem
The increasing size of Active-Matrix Organic Light-Emitting Diode (AMOLED) panels results in excessively large (current×resistance) voltage drops between different regions, leading to uneven optical characteristics and display issues due to inconsistent signal intensity across the panel.
Innovation Solution
A line structure for display screens comprising a display substrate, a main power supply line, and two branch lines that extend from the non-display area to the display area, ensuring consistent signal distribution by reducing the trace distance of signal intensity and minimizing the difference in signal intensities between different positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the panel size is increased, then the display area is enlarged, but the voltage drop difference across the panel becomes excessively large
Solution Approach 1:
The power supply line is divided into a main power supply line and two branch lines. The main power supply line extends from the non-display area to one end of the display area, while the two branch lines extend from opposite ends of the main power supply line toward the signal input side, respectively. This segmentation reduces the maximum trace distance for signal delivery across the panel.
Solution Approach 2:
The power supply network transitions from a single linear path to a branched three-dimensional configuration. By introducing vertical branching from the main line and extending lines in multiple directions along the signal input side, the patent creates a more efficient spatial distribution of power across the display area.
2Area of stationary object
If the panel size is increased, then the display area is enlarged, but the optical characteristics become inconsistent across the panel
Solution Approach 1:
The power supply network is segmented into a main line and two branch lines that extend toward opposite directions along the signal input side. This segmentation ensures that signal intensity is delivered more uniformly across different regions of the display area, improving optical characteristic consistency.
Solution Approach 2:
The patent implements localized power distribution by extending branch lines from opposite ends of the main power supply line toward the signal input side. This creates region-specific optimization where each area receives appropriate signal intensity based on its position, ensuring uniform optical characteristics across the entire display.
Data Source
AI summary
The disclosure discloses a line structure for a display screen including a display substrate, a main power supply line and two branch lines. The display substrate includes a display area and a non-display area. The main power supply line is used to transmit a negative signal power supply (VSS) signal, and a length of the main power supply line is less than a length of a long side of the display area, and two branch lines are electrically connected to an end of the main power supply line and extend toward opposite directions along a signal input side of the display area, respectively.