Modular LED Lighting Device with Dynamic Series-Parallel Switching
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Solution Overview
Problem
State-of-the-art LED lighting devices face inefficiencies due to the need for multiple LEDs in series, which can lead to prolonged shunting and reduced lighting efficiency when connected to conventional alternating current power sources, as the peak voltage exceeds the maximum admissible voltage for each LED.
Innovation Solution
The device comprises modular LED components with internal and additional switches that can adjust their configuration between series and parallel modes based on current measurements, using sensors and control circuits to manage voltage and current, including rectifier bridges and ASICs for efficient power management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If multiple LEDs are connected in series to achieve satisfactory lighting levels, then the lighting efficiency is improved, but the device requires complex power supply circuits to manage voltage and current constraints
Solution Approach 1:
The lighting device is divided into multiple independent modules, each containing a limited number of LEDs (e.g., 2-3 LEDs per module). This segmentation allows each module to operate within safe voltage and current constraints while maintaining high lighting efficiency through series connection of multiple modules. The complexity of power management is distributed across modules rather than concentrated in a single complex circuit.
Solution Approach 2:
The device incorporates dynamic switching mechanisms that can reconfigure LED connections between series and parallel arrangements based on real-time voltage and current conditions. This dynamic adaptability allows the system to optimize lighting efficiency under varying power supply conditions without requiring overly complex fixed circuitry, as the configuration adjusts automatically to maintain efficient operation.
2Adaptability or versatility
If LEDs are connected to alternating current power sources with peak voltage exceeding maximum admissible voltage, then the device can operate with conventional power sources, but the LEDs may be damaged or require prolonged shunting which reduces lighting efficiency
Solution Approach 1:
The device uses dynamic switching circuits that continuously monitor voltage levels and reconfigure LED connections in real-time. When AC voltage peaks exceed safe levels, the switching mechanism automatically shifts LEDs from series to parallel configuration, preventing damage while minimizing the duration of non-optimal operation. This dynamic response maintains high lighting efficiency by limiting shunting to only when absolutely necessary.
Solution Approach 2:
The switching mechanism operates periodically in sync with the AC power cycle, anticipating voltage peaks and valleys. By pre-configuring LED arrangements before dangerous voltage levels are reached and switching back when voltage decreases, the system maintains compatibility with conventional AC power sources while minimizing the time LEDs spend in reduced-efficiency shunted states.
3Adaptability or versatility
If the supply voltage varies with the power source, then the device can operate with different power sources including AC mains, but the current through LEDs must be carefully controlled to prevent damage
Solution Approach 1:
Current control is implemented at the module level rather than requiring a single complex centralized control circuit. Each module contains its own simplified current management logic and switching elements, distributing the control complexity across multiple independent units. This modular approach enables versatile power source compatibility while keeping individual control circuits simple and manageable.
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 modular architecture allows for flexible voltage and current management, enhancing lighting efficiency by optimizing the arrangement of LEDs in response to supply voltage variations and ensuring consistent illumination even with alternating current sources.
Implementation Method 1
The device may comprise a rectifier bridge or several rectifier bridges each associated with one of said several sub-assemblies to rectify the supply voltage of the device
Implementation Method 2
The elementary lighting components are light-emitting diodes, in particular LED and/or OLED and/or PLED
Data Source
Figure 1~5
Figure 6~7
Figure 8~9
AI summary
Lighting and/or display device with low-voltage elementary lighting components such as a light-emitting diode, the device comprising several electrically connected elementary modules (1) so as to be able to be arranged in series, at least one module comprising a lower terminal (2) and an upper terminal (3), between which are arranged at least two elementary lighting components and several switches (5, 7, 8), so as to be able to arrange two elementary lighting components in series or in parallel between the two lower (2) and upper (3) terminals, in which the at least one elementary module (1) comprises a control circuit (11, 12) for switches (5, 7, 8) of said elementary module, the control circuit (11, 12) for switches (5, 7,8) being connected to the device so as to have across its terminals a low voltage potential difference corresponding to the potential difference (V2-V1) between the lower terminal (2) and the upper terminal (3) of said elementary module or the potential difference (V2'-V1) between a terminal of said elementary module and a terminal of a neighboring elementary module.