Lighting Control Device for Automatic and Manual Dimming Modes
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing lighting systems struggle to implement automatic dimming control based on surrounding brightness, in addition to manual control, due to limitations in dimming signal conversion and control configurations.
Innovation Solution
A lighting control device with an input circuit for receiving dimming signals, an output circuit, a detector for measuring surroundings, and a controller that selects between two operation modes to generate appropriate dimming signals for either automatic brightness adjustment or manual control, allowing for increased types of dimming control and improved usability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a dimming signal conversion device is used to convert duty signals to phase control signals, then the lighting fixture can be controlled, but automatic dimming control based on surrounding brightness cannot be implemented
Solution Approach 1:
The lighting control device is designed to perform multiple functions: it can convert duty signals to phase control signals for manual control, and it can also generate dimming signals based on brightness detector input for automatic control. This multi-functionality allows the system to support both manual and automatic dimming control modes without requiring separate control devices.
Solution Approach 2:
The lighting control device acts as an intermediary between the brightness detector and the lighting fixture. It receives both duty signals from manual control interfaces and brightness information from detectors, processes this information, and generates appropriate dimming signals to control the lighting fixture, thereby enabling automatic control functionality.
2Ease of operation
If manual control interface is provided for dimming control, then user can adjust brightness, but automatic brightness adjustment based on surroundings is not available
Solution Approach 1:
The lighting control device dynamically switches between manual control mode and automatic control mode based on the type of input signal received. When a duty signal is received from a manual control interface, it operates in manual mode; when brightness information is received from a detector, it operates in automatic mode. This dynamic adaptability allows the system to provide both manual and automatic control capabilities.
3Device complexity
If duty signal with limited duty cycle range is used, then control is simple, but automatic dimming control based on brightness measurement cannot be achieved
Solution Approach 1:
The lighting control device changes the interpretation of the duty cycle parameter based on the input signal type. When receiving a duty signal, it interprets the duty cycle within the traditional range (e.g., 0-100%). When receiving brightness information from a detector, it translates the brightness level into an appropriate duty cycle value to generate the dimming signal. This parameter transformation enables automatic dimming control while maintaining compatibility with existing signal formats.
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 solution enables dynamic dimming control that adjusts lighting levels based on surrounding brightness and manual input, enhancing the flexibility and usability of lighting systems by allowing seamless transitions between different dimming modes.
Implementation Method 1
a detector configured to measure brightness of surroundings
Data Source
AI summary
The lighting control device includes a controller. The controller generates a second dimming signal corresponding to a measurement result of brightness of surroundings in the first mode and generates a second dimming signal corresponding to a first dimming signal in the second mode. The controller selects the first mode and start operating in the first mode when receiving the first dimming signal having a third duty cycle not falling within a range from a first duty cycle corresponding to an upper limit of the dimming level to a second duty cycle corresponding to a lower limit of the dimming level. The controller selects the second mode and start operating in the second mode when receiving the first dimming signal having a duty cycle falling within the range.