Display Substrate Fanout Layout for Lower IR Drop
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Solution Overview
Problem
The increase in screen size of mobile devices leads to longer signal lines, resulting in IR drops and voltage loading, causing non-uniform brightness and color non-uniformity across the screen.
Innovation Solution
A display substrate design with optimized power source line layout, including angled subpixels and fanout regions, reduced power source line lengths, and integrated gate driving circuits, to minimize IR drops and improve brightness uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the screen size is increased to provide larger display area, then the display area is improved, but the signal line length increases causing IR drop and voltage loading
Solution Approach 1:
The patent divides the display substrate into multiple pixel regions, each with its own power source lines. This segmentation allows each region to be powered independently through shorter lines, reducing overall IR drop while maintaining the large display area.
Solution Approach 2:
The patent introduces a first power source line extending in a first direction and a second power source line extending in a second direction (perpendicular to the first direction). This two-dimensional power distribution network allows power to be delivered to distant pixel regions through multiple short paths rather than one long path, reducing the effective signal line length.
2Area of stationary object
If the signal line length is increased to accommodate larger screen, then the display area is improved, but the IR drop increases causing brightness non-uniformity
Solution Approach 1:
The patent segments the power distribution into multiple independent power source lines extending in different directions. Each line serves a specific pixel region, ensuring that the length of each individual power line remains short, thereby minimizing IR drop and maintaining uniform brightness across the entire display area.
Solution Approach 2:
The patent provides different power source line configurations for different pixel regions. Each region receives power through lines optimized for its specific location and requirements, ensuring uniform power delivery and brightness across the entire display area.
3Loss of energy
If the power source line length is reduced to minimize IR drop, then the brightness uniformity is improved, but the device layout complexity increases
Solution Approach 1:
The patent introduces a second power source line extending in a direction perpendicular to the first power source line. This two-dimensional arrangement allows the system to achieve short power line lengths in both directions, minimizing IR drop while distributing power efficiently across the display substrate through a systematic grid-like pattern.
Data Source
AI summary
The present disclosure provides a display substrate, a manufacturing method and a display device. The display substrate includes a pixel region, a plurality of subpixels, a plurality of first power source lines and a fanout region. An angle between a second direction and a first direction is 80° to 100°, at least a portion of the first power source line extends in the first direction, the pixel region is provided with a first side and a second side arranged in the first direction, and the fanout region is arranged at the first side.