LED Optoelectronic Circuit Dynamic Polarity Switching
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Solution Overview
Problem
Optoelectronic circuits with light-emitting diodes experience inhomogeneous light emission and unequal diode lifetimes due to varying durations of light emission, leading to potential observer perception issues and diode wear imbalance.
Innovation Solution
The optoelectronic circuit is designed with modular elementary electronic circuits, each containing a control circuit and current source, allowing for variable activation of light-emitting diodes based on supply voltage, with a master-slave configuration enabling random or sequenced activation and intensity control, promoting uniform light emission and adjustable diode count.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If fixed sequential switching of LEDs is used to control light emission, then the circuit structure is simple, but the light emission becomes inhomogeneous and LED lifetimes become unequal
Solution Approach 1:
The patent implements dynamic switching of LED groups based on the instantaneous polarity of the alternating voltage. Instead of fixed sequential switching, the circuit dynamically activates different groups of LEDs (odd groups during positive half-cycles, even groups during negative half-cycles), ensuring that all LEDs operate under comparable conditions and emit light homogeneously throughout the AC cycle.
2Device complexity
If fixed sequential switching of LEDs is used, then the circuit configuration is simple, but the LED lifespan becomes unequal due to varying emission durations
Solution Approach 1:
The switching device dynamically selects which group of LEDs to activate based on the voltage polarity, ensuring that all LEDs across different groups have equal opportunities to operate. This dynamic allocation balances the cumulative operating time and stress exposure of all LEDs, extending their overall lifespan and reliability.
Solution Approach 2:
The circuit utilizes the periodic nature of the alternating voltage to systematically switch between different LED groups in each half-cycle. This periodic switching pattern ensures that no single group of LEDs is overused, distributing the operational load evenly across all LED groups over time.
3Device complexity
If LEDs are arranged in a fixed pattern, then the circuit layout is simple, but the light output appears inhomogeneous to observers
Solution Approach 1:
By dynamically activating different spatial groups of LEDs based on voltage polarity, the circuit creates a dynamic light distribution pattern. This ensures that light is emitted from multiple locations throughout the circuit over time, creating a more uniform overall light output that appears homogeneous to observers, even if individual LEDs are arranged in a simple fixed pattern.
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
This solution enhances light emission homogeneity, extends the lifespan of diodes by optimizing usage, and simplifies circuit configuration and expansion, addressing the issues of inhomogeneous light output and unequal diode wear.
Implementation Method 1
an optoelectronic circuit comprising light-emitting diodes
Implementation Method 2
successively activate sets of light-emitting diodes (LEDs) in an optoelectronic circuit
Data Source
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AI summary
The invention relates to an optoelectronic circuit comprising separate interconnected basic electronic circuits (40), each of which (40) includes at least one light emitting diode (D) and at least one integrated circuit chip that has a circuit (46) for controlling the light emitting diode, said circuit (46) being suitable for activating or deactivating the light emitting diode.