Multi-function Lighting Device with Full-bridge Circuit for Dimming
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Solution Overview
Problem
Current lighting devices typically offer only step-dimming and lack the ability to provide stepless dimming and color temperature adjustment functions, requiring multiple driving power sources and resulting in complex circuit structures and increased costs.
Innovation Solution
A multi-function lighting device with a controller, bipolar junction transistors, and light-emitting diodes connected in an inverse parallel configuration, allowing for the adjustment of control signals to achieve stepless dimming and color temperature adjustments using a single driving power source, reducing circuit complexity and cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a lighting device provides both stepless dimming function and color temperature adjustment function, then the functionality and performance are enhanced, but at least two driving power sources are needed and the circuit structure becomes very complicated
Solution Approach 1:
The patent combines two separate driving power sources into one by using a full-bridge circuit configuration. The full-bridge circuit integrates multiple switching elements (first switch connected to positive electrode, second switch connected to negative electrode) that can independently control different light sources through complementary PWM signals, eliminating the need for separate driving power sources while maintaining both stepless dimming and color temperature adjustment functions
Solution Approach 2:
The full-bridge circuit serves multiple functions simultaneously: it acts as a single driving power source, provides independent control for different light sources through PWM modulation, enables both brightness adjustment and color temperature control, and reduces overall system complexity. This multi-functional design allows one circuit structure to replace what would traditionally require multiple separate components
2Adaptability or versatility
If a lighting device provides both stepless dimming function and color temperature adjustment function, then the performance is enhanced, but the cost is significantly increased
Solution Approach 1:
The patent reduces manufacturing cost by merging multiple driving power sources into a single full-bridge circuit configuration. By using one integrated circuit structure with complementary PWM control instead of multiple separate driving power sources, the bill of materials is reduced, assembly steps are simplified, and overall manufacturing complexity is lowered, directly decreasing production cost
3Adaptability or versatility
If multiple driving power sources are used to achieve stepless dimming and color temperature adjustment, then the functionality is improved, but the device size increases
Solution Approach 1:
The patent consolidates multiple driving power sources into a single full-bridge circuit, reducing the physical space required for power supply components. The integrated circuit structure occupies less board area compared to multiple separate driving power sources, thereby reducing overall device volume while maintaining full functionality for stepless dimming and color temperature adjustment
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 provides enhanced performance by enabling both brightness and color temperature adjustments with reduced size and cost, achieving market competitiveness through simplified circuitry and efficient power usage.
Implementation Method 1
the first switch, the second switch, the third switch and the fourth switch are bipolar junction transistors (BJT)
Implementation Method 2
The light source group includes a first light source and a second light source... The first light source and the second light source are light-emitting diodes (LED) or LED arrays
Data Source
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AI summary
A multi-function lighting device includes a controller, a first switch, a second switch, a third switch, a fourth switch and a light source group including a first light source and a second light source. The three ends of the first switch are connected to the controller, a driving power source and a first node respectively. The three ends of the second switch are connected to the controller, the first node and a grounding point respectively. The three ends of the third switch are connected to the controller, the driving power source and a second node respectively. The three ends of the fourth switch are connected to the controller, the second node and the grounding point respectively. The light source group is connected to the first node and the second node.