Segmented LED Driver Modules for Compact Layout
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Solution Overview
Problem
Current LED lamps face challenges in compact design due to limited space for drivers, leading to complex installations and safety concerns, with existing solutions struggling to reduce the volume of single inductors and maintain efficient performance.
Innovation Solution
A driving device comprising multiple sub-driving modules with shared inductors and capacitors forming LC oscillation circuits, each connected to a sub-illuminating unit, allowing energy storage and distribution across multiple inductors, reducing the overall volume and improving layout safety on a circuit board.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a single driver is used to drive all LEDs in series, then the LED lamp can be driven, but the driver occupies too much space in thin and narrow LED lamps
Solution Approach 1:
The single driver is divided into multiple sub-driving modules, each responsible for driving a portion of the LED string. This segmentation reduces the volume of each individual driver module, allowing them to fit within the limited space of thin and narrow LED lamps while maintaining the overall functionality of driving all LEDs in series.
2Device complexity
If a single driver is used, then the circuit is simple, but the installation becomes complex with too much connection and safety concerns
Solution Approach 1:
The driver circuit is segmented into multiple independent sub-driving modules, each capable of independently driving a portion of the LED string. This modular approach simplifies installation by reducing the complexity of connections required, as each module can be independently connected and tested, thereby enhancing safety and ease of installation.
3Volume of moving object
If the frequency is increased to reduce inductor volume, then the inductor volume decreases, but the frequency cannot be made too high due to manufacturing limitations
Solution Approach 1:
Instead of using a single high-frequency inductor with complex manufacturing requirements, the system uses multiple sub-driving modules with inductors operating at lower, more manufacturable frequencies. The combined effect of multiple inductors achieves the same energy storage capacity as a single large inductor, while avoiding the manufacturing difficulties of high-frequency high-performance inductors.
4Object-affected harmful factors
If a high switching frequency power supply with high performance magnetic material is used, then EMC noises are suppressed, but the effect is quite poor and the volume is still large
Solution Approach 1:
The power supply is divided into multiple sub-driving modules, each with its own inductor and capacitor forming LC oscillation circuits. This segmentation distributes the electromagnetic interference across multiple smaller units rather than concentrating it in a single high-frequency power supply, thereby suppressing EMC noises more effectively while reducing the overall volume.
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 enables a compact LED lamp design with easier and safer circuit layout, improved service lifetime, and reduced wire crossings, allowing for efficient energy distribution to LED arrays without relying on a single large inductor.
Implementation Method 1
respective sub driving module further comprises a capacitor, and the capacitor and corresponding inductor constitute an LC oscillation circuit
Data Source
Figure 1
AI summary
The present invention relates to a driving device (1, 2, N) for an illuminating device, the illuminating device comprising a plurality of sub illuminating units (D12, D22, DN2), the driving device comprises a plurality of sub driving modules (L1, C1; L2, C2; LN, CN) in series connected to an input voltage source to distributively store energy from the input voltage source, each of the sub driving modules (L1, C1; L2, C2; LN, CN) being allocated to and electrically connected with one sub illuminating unit (D12, D22, DN2), so as to release the stored energy of a sub driving module (L1, C1; L2, C2; LN, CN) to the sub illuminating unit (D12, D22, DN2) allocated thereto. According to the present invention, an LED lamp having a small volume can be realized, and the layout of the LED lamp on the circuit board is easier and safer.