Pull-Chain LED Lamp Control for Dimming and Color Adjustment
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Solution Overview
Problem
Conventional pull chain switches in lamps only allow basic on/off functionality, failing to meet user demands for dimming and color adjustment.
Innovation Solution
A LED module lamp control device incorporating a pull chain switch assembly that enables control over dimming, color adjustment, and on/off operations through a control module connected to a power drive and dimming drive module, utilizing a control signal generated by the switch's position changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a pull chain switch is connected in series into a power supply branch to achieve basic on/off control, then the lamp can be turned on/off reliably, but the control functionality remains limited and cannot meet user demands for dimming and color adjustment
Solution Approach 1:
The pull chain switch assembly is designed to generate multiple types of switch signals (first, second, and third signals) corresponding to different user pulling actions. These signals control different functions including on/off switching, dimming, and color temperature adjustment, making a single mechanical component serve multiple control purposes and eliminating the need for separate controls for each function
2Adaptability or versatility
If a pull chain switch is used for decorative effect and unique user experience, then user satisfaction is improved, but the lamp cannot provide diversified control options for brightness and color temperature
Solution Approach 1:
The control module serves as an intermediary between the mechanical pull chain switch and the lighting control system. It receives the mechanical switching action and translates it into appropriate control signals for dimming and color temperature adjustment, bridging the gap between simple mechanical input and complex lighting control requirements while maintaining system reliability
Solution Approach 2:
The patent replaces the need for multiple mechanical controls (separate dimmer switches, color temperature controls) with a single mechanical pull chain switch. The mechanical action is substituted by an electronic control system that generates different control signals based on the pulling pattern, reducing mechanical complexity while expanding control capabilities
Data Source
AI summary
A LED module lamp control device using pull chain switch is disclosed, including a light-emitting assembly, a pull chain switch assembly, a control module, a power drive module and a dimming drive module. The pull chain switch assembly is configured to form a switch signal when being driven, the control module is provided with a signal input terminal, the signal input terminal of the control module is connected to the pull chain switch assembly to acquire a switch signal, the power drive module is configured to connect to a power supply, the dimming drive module is connected to the light-emitting assembly to form at least part of a dimming drive branch, the power drive module is connected to the dimming drive branch to supply power to the light-emitting assembly, and the control module is connected to a controlled end of the dimming drive module.