Multi-Voltage LED Devices with Integrated Voltage Limiting
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Solution Overview
Problem
Existing LED technologies are limited in their ability to operate at multiple voltage levels and brightness levels, particularly when powered by AC sources, and lack integrated circuit configurations that allow for flexible voltage and current selection, which restricts their versatility and efficiency in various applications.
Innovation Solution
The development of multi-voltage and multi-brightness LED devices that can be configured for direct AC or DC power operation by integrating multiple single voltage LED circuits in series or parallel configurations, allowing for selectable voltage and brightness levels through electrical connections, and the use of high-frequency transformers or inverters to optimize power delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If LEDs are driven by DC voltage sources using resistors or regulators to limit voltage and current, then the LED operates reliably, but the device complexity increases and the adaptability to different voltage sources decreases
Solution Approach 1:
The patent extracts the voltage limiting function from external resistors or regulators and integrates it directly into the LED device through built-in series diodes. This eliminates the need for separate external components while maintaining reliable operation, thereby reducing device complexity without sacrificing reliability
Solution Approach 2:
The patent creates LED devices that can operate with multiple different voltage sources (e.g., 5V, 12V, 24V, or higher) by incorporating multiple series diodes that can be selectively connected. This multi-functionality allows a single device design to serve multiple voltage requirements, reducing the need for multiple specialized devices
2Adaptability or versatility
If multiple LED devices are used to achieve different voltage levels and brightness settings, then the adaptability improves, but the device complexity and manufacturing cost increase
Solution Approach 1:
The patent combines multiple LED devices with different voltage requirements into a single integrated device by connecting multiple series diode strings in parallel configurations. Each string is designed for a specific voltage level, and they are all contained within one device package with common cathode or anode connections, eliminating the need for separate devices
Solution Approach 2:
The patent enables dynamic brightness control by allowing selective activation of different LED strings based on the input voltage level. The device can dynamically adapt its configuration to match the available power source, providing both voltage adaptation and brightness control in a single device
3Ease of operation
If standard AC voltages are used to power LEDs, then the ease of operation improves, but the device complexity increases due to rectification and voltage regulation requirements
Solution Approach 1:
The patent enables LED devices to self-adapt to AC power sources by incorporating rectifying diodes that automatically convert AC to DC and series diodes that automatically limit the voltage to safe levels for the LED chips. This self-service approach eliminates the need for complex external rectification and regulation circuits, allowing direct connection to standard AC outlets
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 LED devices to operate efficiently at various voltage levels and brightness settings, improving their adaptability to different power sources and applications, reducing the size and cost of power supplies, and enhancing production and inventory management for manufacturers.
Implementation Method 1
the use of high-frequency transformers or inverters to optimize power delivery
Implementation Method 2
LEDs are semiconductor devices that produce light when a current is supplied to them
Implementation Method 3
LEDs are semiconductor devices that produce light when a current is supplied to them
Data Source
AI summary
A system and method transforming AC voltage to a high-frequency AC voltage and providing the high-frequency AC voltage to an AC LED circuit or rectifying the high-frequency circuit to a DC voltage and providing the DC voltage to a DC LED circuit.