Micro-LED Power Line Layout for Uniform Array Brightness
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Solution Overview
Problem
Existing light-emitting element arrays in electronic devices suffer from uneven luminous intensity due to increased wire length and impedance, leading to decreased brightness in elements farther from the power supply, resulting in an undesirable viewing experience.
Innovation Solution
The electronic device employs a circuit arrangement where power lines in different areas are configured to minimize impedance, with non-overlapping areas and varying widths and materials to ensure consistent luminous intensity across the array.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If power lines are extended to reach light-emitting elements farther from the power supply, then more elements can be illuminated, but impedance increases causing decreased brightness
Solution Approach 1:
The light-emitting array is divided into multiple independent areas, each with its own dedicated power line and power supply element. This segmentation prevents the impedance problem from affecting the entire array, as each segment operates independently with its own power delivery path.
Solution Approach 2:
Different areas of the light-emitting array are provided with locally optimized power supply configurations. Each area has its own power line and power supply element positioned and sized appropriately for that specific area, ensuring uniform brightness across the entire array without being constrained by distance from a single power source.
2Illumination intensity
If power lines are made wider to reduce impedance, then brightness uniformity improves, but device area increases
Solution Approach 1:
The array is divided into multiple areas with separate power lines, allowing each power line to be optimized for its specific area. This eliminates the need for excessively wide power lines spanning the entire array, as each segment only requires sufficient width for its local requirements.
Solution Approach 2:
Instead of solving the impedance problem by increasing power line width in two dimensions, the solution transitions to a third-dimensional approach by distributing multiple power supply elements throughout the array structure, providing localized power delivery that reduces the burden on individual power line dimensions.
3Device complexity
If a single power supply element is used for the entire array, then device complexity is reduced, but brightness uniformity deteriorates
Solution Approach 1:
The array is divided into multiple areas, each with its own power supply element. This segmentation approach accepts increased device complexity as a necessary trade-off to achieve uniform brightness across the entire array, with each segment independently optimized for consistent illumination.
Solution Approach 2:
Each area of the array is provided with a locally positioned power supply element, ensuring that all light-emitting elements in that area receive power at optimal impedance levels. This local quality approach guarantees consistent luminous intensity across the entire array, with each area independently optimized for its specific spatial requirements.
Data Source
AI summary
An electronic device is provided, including a substrate; a plurality of inorganic light-emitting diodes disposed on the substrate; a connecting line layer including a first and second connecting line disposed on the substrate; an electrical line disposed on the substrate; and a printed circuit board. The plurality of inorganic light-emitting diodes include a first, second, third and fourth inorganic light-emitting diode. The connecting line includes a first part extending in a first direction and a second part extending in a second direction different from the first direction. A range is surrounded by an outer edge of the first inorganic light-emitting diode, an outer edge of the second inorganic light-emitting diode, an outer edge of the third inorganic light-emitting diode and an outer edge of the fourth inorganic light-emitting diode, and at least a portion of the first part of the first connecting line is disposed in the range.