DC Sensing Device for LED Lighting Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional light modulators designed for AC power supplies are incompatible with LED lighting equipment that requires DC power, leading to increased costs, heat generation, and reduced component lifetime, as they need AC-to-DC adapters and higher voltage capabilities.
Innovation Solution
A sensing device with a control module, signal adjusting unit, object detecting unit, and manual time-delay adjustor that uses an external DC power source to send PWM or PFM signals to control LED lighting equipment, allowing for adjustable illuminating levels and reducing equipment costs by eliminating the need for AC-to-DC adapters and high-voltage components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional light modulators are used with AC power supply, then they can control illuminating levels, but they require AC-to-DC adapters and high-voltage components which increase cost and device volume
Solution Approach 1:
The patent changes the power supply parameter from AC to DC, eliminating the need for AC-to-DC adapters and high-voltage components. The light modulator is redesigned to operate directly on DC power, reducing device complexity and cost while maintaining illuminating level control functionality through PWM or PFM signal generation.
Solution Approach 2:
The patent extracts and removes the AC-to-DC adapter and high-voltage components from the system by redesigning the light modulator to accept DC power directly. This extraction simplifies the overall device structure, reduces volume, and lowers cost while preserving the core light control function.
2Reliability
If conventional light modulators operate under AC power, then they can function properly, but electronic components generate large amounts of heat reducing component lifetime
Solution Approach 1:
The patent changes the operating power parameter from AC to DC, which fundamentally alters the thermal characteristics of the system. DC operation eliminates the rectification and filtering processes that generate heat in AC-powered systems, thereby reducing heat generation and improving component lifetime and reliability.
3Adaptability or versatility
If AC-to-DC adapters are employed to enable conventional light modulators with LED lighting equipment, then compatibility is achieved, but cost and volume of the equipment are increased
Solution Approach 1:
The patent creates a universal light modulator design that can operate directly with DC-powered LED lighting equipment without requiring additional adapter components. This multi-functional design integrates power conditioning and light control in a single unit, eliminating the need for separate AC-to-DC adapters and reducing overall equipment volume.
Data Source
AI summary
A sensing device, for controlling an LED lighting equipment, and more especially for electrical connection with at least one LED lighting equipment that can be driven by a DC power supply, is disclosed. The sensing device, which can be supplied with an external DC power source, comprises a control module, a signal adjusting unit, an object detecting unit, and a manual time-delay adjustor. The control module can send a control signal train of PWM or PFM to the signal adjusting unit, which will in turn send an amplified signal train of PWM or PFM to the LED lighting equipment, so as to control the illuminating level of the equipment. Thus, the problems of the conventional light modulators, resulting from the use of an AC power supply, can be alleviated. Also, the associated cost of the equipment can be reduced.