Capacitor-Free LED Illuminator Using Three-Phase Rectification
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Solution Overview
Problem
Conventional LED illuminating devices require capacitors for energy storage and filtering functions, which may not be necessary or efficient in all applications.
Innovation Solution
An LED illuminating device is designed without using a capacitor, incorporating a circuit substrate with surge absorbers, bridge rectifiers, LED chip groups, and current-limiting chips to provide a lighting source using a three-phase power supply, eliminating the need for capacitors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If capacitors are used for energy storage and filtering functions, then the device can maintain stable operation, but the device complexity and potential failure points increase
Solution Approach 1:
The patent removes capacitors from the LED illuminating device circuit, eliminating the energy storage and filtering functions that capacitors traditionally provide. This extraction of the capacitor component directly reduces device complexity and potential failure points while the invention compensates for the removed functionality through alternative circuit design using bridge rectifiers and surge absorbers in a three-phase configuration
Solution Approach 2:
The bridge rectifier group and surge absorber group perform multiple functions simultaneously: they provide power conversion, voltage regulation, surge protection, and implicit filtering without requiring separate capacitor components. This multi-functionality compensates for the removed capacitor while maintaining operational stability
2Use of energy by moving object
If capacitors are used for energy storage, then the device can handle power fluctuations, but the risk of flicker increases
Solution Approach 1:
The three-phase power supply configuration with bridge rectifier groups ensures continuous power delivery to the LED chip groups without the flicker associated with capacitor charging/discharging cycles. The multiple phases provide overlapping power delivery that maintains continuous illumination without the intermittent operation caused by capacitor-based energy storage
Solution Approach 2:
By removing capacitors from the circuit, the patent eliminates the primary source of flicker in LED devices. The alternative design using three-phase rectification provides smooth, continuous power delivery without the voltage ripple and intermittent operation that characterizes capacitor-based energy storage systems
3Reliability
If capacitors are used for filtering, then the device can smooth power delivery, but the device cannot operate in higher temperature environments
Solution Approach 1:
The patent employs surge absorber groups that can be easily replaced if needed, and the overall circuit design uses simple, robust components without capacitors that have limited temperature tolerance. This approach prioritizes temperature resilience over sophisticated filtering, accepting some power delivery variation in exchange for extended high-temperature operation
Solution Approach 2:
By eliminating capacitors from the circuit, the patent removes the primary temperature limitation. Capacitors have restricted operating temperature ranges and degrade at high temperatures; their removal enables the device to operate reliably in higher temperature environments while the three-phase rectifier design provides adequate power smoothing without temperature-sensitive components
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 device effectively generates a lighting source using a three-phase power supply, reducing the risk of flicker and allowing operation in higher temperature environments without the need for capacitors.
Implementation Method 1
a first surge absorber electrically connected between the first AC power input terminal and the second AC power input terminal
Implementation Method 2
a first bridge rectifier electrically connected between the first AC power input terminal and the second AC power input terminal
Implementation Method 3
the first LED chip group is electrically connected to the first bridge rectifier, and the first LED chip group includes a plurality of first LED chips
Implementation Method 4
a first current-limiting chip electrically connected between the first LED chip group and the first bridge rectifier
Data Source
AI summary
An LED illuminating device without using a capacitor includes a surge absorber group, a three-phase rectifier bridge module, an LED chip group and a current-limiting chip group. The surge absorber group includes a first surge absorber electrically connected between the first and the second AC power input terminal, and a second surge absorber electrically connected between the second and the third AC power input terminal, and a third surge absorber electrically connected between the third and the first AC power input terminal. The three-phase rectifier bridge module is electrically connected to the first, the second and the third AC power input terminal. The LED chip group is electrically connected to the three-phase rectifier bridge module. The current-limiting chip group is electrically connected to the bridge rectifier group. The LED illuminating device can generate a lighting source through a three-phase power provided by a three-phase power supply.