Series LED PCB Layout for Higher-Voltage Color-Tunable Lighting
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Solution Overview
Problem
Existing LED-based devices face challenges in operating at higher voltages, particularly for blue and green LEDs, and there is a desire for compact, efficient, and color-tunable lighting solutions with improved electrical design.
Innovation Solution
A light generating device comprising a series of electrically conductively coupled LEDs, including p-side up and n-side up LEDs, supported by a printed circuit board, allowing operation at higher voltages and enabling compact, color-tunable lighting with controlled voltage differences across series.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If LEDs are connected in series to operate at higher voltages, then voltage compatibility is improved, but device complexity increases
Solution Approach 1:
The patent combines multiple LEDs (different orientations and colors) into a single integrated device mounted on one PCB, with all series connections made within the device. This merging approach allows the device to operate at higher voltages (e.g., 12V) while keeping the electrical design contained within a single unit, reducing system-level complexity.
Solution Approach 2:
The device achieves multi-functionality by integrating LEDs of different colors (red, green, blue) and orientations (p-side up, n-side up) into a single series circuit. This universal design allows one device to provide multiple lighting functions and voltage compatibility without requiring separate circuits for each function.
2Volume of moving object
If multiple LEDs are integrated into a compact device, then device size is reduced, but heat dissipation becomes more difficult
Solution Approach 1:
The patent segments the device into multiple functional zones on the PCB: LED mounting areas, heat sinking areas, and electrical connection areas. By separating heat-generating LED components from heat dissipation structures, the design manages thermal load effectively within a compact form factor.
Solution Approach 2:
The PCB serves as an intermediary between the LEDs and the heat sinking structure. It provides both electrical connections and thermal management, acting as a mediator that transfers heat from the LEDs to dedicated heat dissipation areas while maintaining compact integration.
3Productivity
If p-side up and n-side up LEDs are used together, then manufacturing efficiency is improved, but electrical connection complexity increases
Solution Approach 1:
The patent applies local quality by assigning different orientations (p-side up or n-side up) to different LEDs based on their specific requirements. Each LED can be optimally oriented for its color and function, while the PCB provides localized electrical connections that simplify the overall wiring complexity through strategic placement of contact pads.
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 solution enables efficient operation of LEDs at higher voltages, provides compact and color-tunable lighting, and allows for controlled color temperature adjustment, enhancing electrical design and flexibility in lighting applications.
Implementation Method 1
a first series of at least two first LEDs, which are electrically conductively coupled
Implementation Method 2
the at least two first LEDs comprise solid-state LEDs
Data Source
AI summary
The invention provides a light generating device (1000) comprising (i) a first series (1100) of at least two first LEDs (100), which are electrically conductively coupled, and (ii) a first support (2100) configured to support the at least two first LEDs (100), wherein: (i) the at least two first LEDs (100) comprise solid-state LEDs (10); and (ii) the at least two first LEDs (100) comprise a p-side up LED (110) and an n-side up LED (120), and wherein the at least two first LEDs (100) are configured to generate first LED light (101) having dominant wavelengths within 50 nm of each other.