Series PCB LED Layout for High-Voltage Compact Red Lighting
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Solution Overview
Problem
Existing LED-based light generating devices face challenges in operating at higher voltages, achieving compact size, and providing efficient and color-tunable lighting solutions, particularly for red LEDs.
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 for efficient operation at higher voltages and compact design, with optional series configurations for color tunability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If multiple LEDs are connected in series to operate at higher voltages, then the operating voltage increases, but the device complexity increases
Solution Approach 1:
The patent combines multiple LED chips (including p-side up and n-side up LEDs) onto a single printed circuit board with integrated conductive traces. This merging approach allows series connection of LEDs to achieve higher operating voltages while maintaining a compact, unified structure that does not significantly increase overall device complexity
Solution Approach 2:
The printed circuit board serves multiple functions: it provides mechanical support for the LED chips, establishes electrical connections through conductive traces, enables series configuration for higher voltage operation, and facilitates compact integration. This multi-functional design resolves the contradiction by handling voltage increase without proportional complexity increase
2Power
If LEDs are arranged in series configuration for higher voltage operation, then the voltage handling capability improves, but the compactness of the device deteriorates
Solution Approach 1:
The patent utilizes the two-dimensional surface of the printed circuit board to arrange multiple LED chips in a compact layout. By spreading components across the board surface rather than stacking them vertically or extending the device lengthwise, the design achieves series connection for high voltage while maintaining small overall volume
Solution Approach 2:
Multiple LED chips are integrated onto a single printed circuit board, with conductive traces nested within the board structure. This nested integration allows series connection of LEDs without increasing external device dimensions proportionally, maintaining compactness while achieving high voltage operation
3Productivity
If p-side up and n-side up LEDs are used together in series, then the voltage operation efficiency improves, but the manufacturing precision requirements increase
Solution Approach 1:
The patent employs different LED chip orientations (p-side up and n-side up) at different locations on the printed circuit board, each optimized for its specific electrical connection requirements. This local quality approach allows efficient series connection for high voltage operation while the standardized PCB layout maintains manageable manufacturing precision requirements
4Productivity
If multiple conductive connections are made for series LED configuration, then the electrical performance improves, but the reliability of connections deteriorates
Solution Approach 1:
Multiple individual wire or trace connections are consolidated into integrated conductive pathways within the printed circuit board. This merging of connections into a unified PCB trace system improves electrical performance for series LED operation while increasing overall connection reliability by reducing the number of discrete connection points that could fail
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
Enables operation of LEDs at higher voltages, provides compact and efficient lighting with tunable color options, and supports various lighting applications including office, household, and automotive systems.
Implementation Method 1
the at least two first LEDs comprise solid-state LEDs configured to generate red LED light
Implementation Method 2
the at least two first LEDs are configured to generate first LED light having dominant wavelengths within 50 nm of each other
Data Source
Figure 1A~1B
Figure 1C~1E
Figure 1F~2A
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.