Micro-LED Display Power Line Layout for Stable Large-Area Panels
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Solution Overview
Problem
Existing micro-LED display panels face challenges in efficiently managing power distribution and signal transmission due to the large number of chip-like micro-LEDs, which can lead to inefficiencies and limitations in achieving high definition and large-scale displays.
Innovation Solution
A display device design incorporating a flexible wiring substrate with a first and second power line system, connected by a conductive material, to stabilize voltage potentials and facilitate efficient power supply to micro-LEDs, along with a control module for managing signal transmission and scanning control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the display panel is enlarged to achieve larger scale display, then the display area increases, but the power line resistance increases leading to display quality degradation
Solution Approach 1:
The power supply system is segmented into multiple independent power lines (first power line and second power line) that are spatially separated and extend in different directions. This segmentation allows each power line to serve a specific region of the display panel, reducing the effective current path length and minimizing resistance accumulation in each individual power line while maintaining overall large display area coverage
Solution Approach 2:
Different regions of the display panel are assigned different power supply characteristics through the first and second power lines. The first power line supplies power to a first region while the second power line supplies power to a second region, allowing each region to receive optimized power distribution tailored to its specific requirements, thereby maintaining display quality across the entire enlarged panel
2Area of stationary object
If the power line length is increased to cover larger display areas, then the display coverage increases, but the ohmic drop increases causing potential instability
Solution Approach 1:
The power distribution network is divided into multiple segmented power lines that extend in different directions from the basement. This segmentation breaks down the long current path into shorter segments, reducing the cumulative resistance and ohmic drop in each segment while collectively covering the entire large display area
Solution Approach 2:
Instead of extending a single power line linearly across the display panel, the patent introduces power lines that extend in multiple dimensions and directions from the basement. The first power line and second power line are arranged to cover different spatial regions, transforming the one-dimensional power distribution into a multi-dimensional network that reduces current path length and resistance
3Reliability
If multiple power lines are added to improve power distribution, then the power coverage improves, but the device complexity increases
Solution Approach 1:
The first power line and second power line are merged at the basement, which serves as a common power supply node. This merging point allows both power lines to be supplied from a single power source while maintaining their separate paths across different regions of the display panel, achieving uniform power distribution without requiring completely independent power supply systems
Solution Approach 2:
The basement serves multiple functions: it acts as the common power supply node for both the first and second power lines, and simultaneously serves as the mounting substrate for the micro-LEDs. This multi-functionality reduces the need for additional dedicated power supply structures, thereby limiting the increase in device complexity while achieving improved power distribution
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
The design ensures stable power distribution and effective signal management, enhancing the performance and scalability of micro-LED displays by maintaining consistent voltage potentials and optimizing pixel control.
Implementation Method 1
a first conductive material located between the first connection surface and the first wiring substrate to connect the first power line with the first wiring substrate
Data Source
AI summary
According to one embodiment, a display device includes a display panel, a first wiring substrate, and a first conductive material. The display panel includes a basement located in a display area and a non-display area, a plurality of pixels arranged above the basement and located in the display area, a plurality of pads arranged above the basement and located in the non-display area, and a first power line arranged above the basement, located between the display area and the plurality of pads in the non-display area, and including the first connection surface.