Array Substrate Fan-Out Structures for Horizontal IR Drop Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Display panels face significant horizontal IR drops, leading to uneven brightness due to voltage drops along anode or cathode lines, which existing technologies have not adequately addressed, particularly in larger panels where horizontal IR drops are greater than vertical drops.
Innovation Solution
The array substrate design includes multiple power supply input terminals and fan-out structures with equal resistances, allowing for efficient distribution of power supply signals to pixel columns, reducing horizontal IR drops and improving brightness uniformity by ensuring each power supply input terminal corresponds to multiple pixel columns, thereby minimizing voltage drops across the display area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single power supply input terminal is used for the display panel, then the device complexity is reduced, but horizontal IR drop increases causing uneven brightness
Solution Approach 1:
The power supply input terminals are segmented into multiple terminals (first power supply input terminals and second power supply input terminals) that are spatially distributed across the display panel. Each terminal serves specific pixel columns, dividing the power distribution function into multiple independent units to reduce voltage drops and improve brightness uniformity.
2Illumination intensity
If multiple power supply input terminals are used, then brightness uniformity is improved, but device complexity increases
Solution Approach 1:
Different power supply input terminals are assigned to different regions of the display panel, with each terminal optimally positioned to serve its local area. The first power supply input terminals are configured for first pixel columns while second power supply input terminals serve second pixel columns, creating localized power distribution zones that minimize resistance and improve efficiency.
3Area of stationary object
If power supply lines are extended to cover larger display areas, then the display area increases, but horizontal IR drop increases causing voltage variations
Solution Approach 1:
The power supply terminals are arranged in both horizontal and vertical dimensions across the display panel. By distributing terminals along the vertical direction (different rows) and horizontal direction (different columns), the patent creates a two-dimensional power distribution network that reduces the length of power supply lines in any single direction, thereby minimizing horizontal IR drops while maintaining large display area coverage.
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 design effectively reduces horizontal IR drops, enhancing the uniformity of display brightness and preventing driving chip overload, resulting in improved display quality and reduced voltage variations across the panel.
Implementation Method 1
Each first power supply input terminal is connected to multiple pixel columns of the plurality of pixel columns through one first fan-out structure, so as to provide a first power supply signal to the multiple pixel columns
Implementation Method 2
resistances of the plurality of first conductive units are substantially equal... effectively reduces horizontal IR drops
Data Source
AI summary
An array substrate has a display area and a non-display area including a first bonding region and a fan-out region located between the display area and the first bonding region. The array substrate includes: a plurality of pixel columns disposed in the display area, at least two first power supply input terminals disposed in the first bonding region, and at least two first fan-out structures disposed in the fan-out region. Each pixel column includes light-emitting units. Each first power supply input terminal is connected to multiple pixel columns of the plurality of pixel columns through one first fan-out structure, so as to provide a first power supply signal to the multiple pixel columns. Each first fan-out structure includes a plurality of first conductive units, and each first conductive unit is electrically connected to at least one of the plurality of pixel columns.