Display Power Grid Layout for Pixel Voltage Stability
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Solution Overview
Problem
The challenge of stably supplying drive voltage to pixels in display devices due to IR drop issues caused by power line resistance is addressed.
Innovation Solution
A power line configuration is implemented with alternating connections of horizontal and vertical power lines, ensuring stable voltage distribution by crossing and connecting in a specific pattern.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a simple power line configuration is used, then the device complexity is reduced, but the voltage stability deteriorates due to IR drop
Solution Approach 1:
The power line configuration is segmented into multiple horizontal and vertical power lines that form a grid structure. This segmentation allows the power distribution network to be divided into smaller zones, reducing the effective resistance path for each pixel and mitigating IR drop effects while maintaining overall system simplicity
Solution Approach 2:
The power line configuration transitions from a single-dimensional linear arrangement to a two-dimensional grid structure by introducing both horizontal and vertical power lines. This dimensional change creates multiple parallel current paths, reducing overall resistance and improving voltage stability without significantly increasing complexity
2Ease of manufacture
If the power line resistance is increased, then the ease of manufacture is improved, but the voltage supply stability deteriorates
Solution Approach 1:
Multiple power lines (both horizontal and vertical) are merged into a unified grid configuration where they intersect and connect. This merging creates redundant current paths that compensate for resistance effects, allowing the use of standard manufacturing processes while achieving improved voltage stability through the combined effect of multiple conductive paths
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 reduces the impact of IR drop, stabilizes voltage supply to pixels, and enhances the lifespan and performance of the display device.
Implementation Method 1
the drive voltage may not be stably supplied to the pixels when there is an IR drop, depending on the resistance of the power line
Data Source
AI summary
A display device includes a plurality of pixels. A power line is connected to the plurality of pixels. The power line includes a plurality of horizontal power lines extending in a first direction and arranged in a second direction crossing the first direction and a plurality of vertical power lines extending in the second direction and arranged in the first direction. The plurality of vertical power lines cross the plurality of horizontal power lines when viewed from above a plane. The plurality of horizontal power lines is alternately connected to two adjacent vertical power lines of the plurality of vertical power lines.