LED Dimming Circuit With Single-Path Night Light Switching
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Solution Overview
Problem
Existing LED circuits require separate paths for main lighting and night light functions, increasing costs.
Innovation Solution
A dimming circuit with a night light function that uses a single light source path, incorporating a rectifier module, selection module, and dimming control module to control current values through different pathways, allowing both functions to be achieved without affecting the main lighting status.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate light source paths are used for main lighting and night light functions, then the lighting functions can be independently controlled, but the cost and device complexity increase
Solution Approach 1:
The patent applies universality by enabling a single light source path to perform multiple functions (main lighting and night light) through a selection module that can switch between different current output modes. The first pathway provides high current for main lighting while the second pathway provides low current for night light, allowing one light source to serve multiple purposes without requiring separate circuit paths for each function.
2Adaptability or versatility
If separate light source paths are used for main lighting and night light functions, then the lighting functions can be independently controlled, but the manufacturing cost increases
Solution Approach 1:
The patent reduces manufacturing cost by designing a universal light source path that can operate in multiple modes. Instead of manufacturing separate LED circuits for main lighting and night light functions, the invention uses one light source with a selection module that switches between high-current and low-current output modes, thereby reducing component count and manufacturing complexity.
Solution Approach 2:
The patent merges the main lighting and night light functions into a single integrated circuit path. The selection module combines the control of both functions within one pathway structure, where the first and second pathways share common input and output connections to the light source, reducing the need for separate manufacturing processes and lowering overall production cost.
3Ease of manufacture
If a single light source path is used for both main lighting and night light functions, then the cost is reduced, but the control complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the control function into distinct pathways within the selection module. The first pathway is dedicated to main lighting control while the second pathway handles night light control, allowing independent control logic for each function even though they share the same physical light source path. This segmented control approach manages complexity by organizing control functions into separate, manageable segments.
4Adaptability or versatility
If dimming control is added to achieve luminance control under main lighting state, then the lighting requirements for different luminance are met, but the device complexity increases
Solution Approach 1:
The dimming control module is designed to work universally with both main lighting and night light functions through the selection module interface. The same dimming control circuitry can adjust luminance for main lighting when the first pathway is active and can also control luminance for night light when the second pathway is active, providing multi-functional control without requiring separate dimming circuits for each lighting mode.
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
Reduces costs by using one light source path for both night light and main lighting functions, while providing luminance control under main lighting conditions.
Implementation Method 1
a rectifier module, an LED light source, a selection module and a dimming control module; an input end of the rectifier module being used to connect to a power supply
Implementation Method 2
an LED light source
Implementation Method 3
an LED light source
Data Source
AI summary
Disclosed is a dimming circuit with a night light function, having a rectifier module, an LED light source, a selection module and a dimming control module. An input end of the rectifier module is connected to a power supply; an output end of the rectifier module is respectively connected to an anode of the LED light source, a control input end of the selection module and a dimming signal input end of the dimming control module; the selection module has a first pathway and a second pathway which can be gated and output different current values; an output end of the dimming control module is connected to an input end of the first pathway and an input end of the second pathway respectively; and the cathode of the LED light source is connected to an output end of the first pathway and an output end of the second pathway.