Lighting Device Coding Switch Illumination Compensation
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Solution Overview
Problem
Current lighting devices face challenges in illumination compensation due to varying wire lengths, which increase costs when using traditional phototube-based mechanisms.
Innovation Solution
A lighting device with a coding switch connected to a controller, where the coded value is adjustable to match the wire length, allowing the controller to adjust the duty cycle of the driving signal to compensate for wire length variations, eliminating the need for a phototube and reducing manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a phototube-based illumination compensation mechanism is used, then illumination compensation function is achieved, but manufacturing cost significantly increases
Solution Approach 1:
The patent extracts and removes the phototube component from the illumination compensation system. Instead of using a phototube to detect ambient light and automatically adjust illumination, the patent uses a coding switch to manually select wire length configurations, thereby eliminating the expensive phototube while maintaining compensation functionality through a different mechanism.
Solution Approach 2:
The patent replaces the expensive phototube with a much cheaper coding switch mechanism. The coding switch uses simple electrical contacts and wiring configurations to achieve illumination compensation, sacrificing the automatic detection capability of phototubes for a cost-effective manual selection system.
2Reliability
If wire length of conducting wire is changed, then illumination compensation is needed, but device complexity increases
Solution Approach 1:
The patent segments the conducting wire into multiple sections with different lengths, each corresponding to a specific coding switch position. This segmentation allows the system to compensate for illumination variations by selecting different wire length configurations, thereby achieving compensation without requiring complex automatic detection and adjustment mechanisms.
Solution Approach 2:
The patent introduces dynamic configurability through the coding switch, allowing the wire length configuration to be changed based on illumination conditions. The coding switch can dynamically select different wire length settings, providing adaptability while keeping the overall device structure relatively simple compared to automatic phototube-based systems.
Data Source
AI summary
A lighting device includes a light source, a conducting wire, a controller and a coding switch. The conducting wire is connected to the light source. The controller is connected to a power source and a conducing wire. The coding switch is connected to the controller. The coded value of the coding switch is adjustable, such that the coded value is corresponding to the wire length of the conducting wire. The controller adjusts the duty cycle of a driving signal according the wire length corresponding to the coded value, and outputs the driving signal to the light source in order to drive the light source. The lighting device can provide the illumination compensation function via the coding switch without a phototube, which can significantly reduce the cost of the lighting device in order to satisfy the actual requirements.