LED Dimming Controller Using AC Wave Counting
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Solution Overview
Problem
Conventional LED driving circuits lack user-adjustable light output, requiring external apparatuses for dimming, which is inconvenient and costly.
Innovation Solution
A controller with dimming control circuitry that adjusts the driving signal by counting AC signal waves, allowing for user-controlled dimming of LED light sources through a power switch, enabling adjustable light output without additional dimming apparatuses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional LED driving circuit with predetermined light output is used, then the circuit structure is simple, but the light output cannot be adjusted by users
Solution Approach 1:
The patent combines the dimming control function with the existing power switch by integrating dimming control circuitry that detects power switch operations. This merging allows the power switch to serve dual purposes: controlling power delivery and adjusting light output levels, thereby adding adaptability without significantly increasing device complexity
Solution Approach 2:
The dimming control circuitry automatically detects power switch operations and generates appropriate dimming control signals without requiring external dimming devices or additional user apparatus. The system serves itself by using its own power switch operations as the basis for dimming control, eliminating the need for separate dimming controls
2Adaptability or versatility
If external dimming apparatuses are used to control LED light output, then light output can be adjusted, but the device complexity and cost increase
Solution Approach 1:
The power switch is given universal functionality by making it control both power delivery and light output dimming. The dimming control circuitry detects the power switch operations and uses them to generate dimming control signals, allowing one device (power switch) to perform multiple functions (power control and dimming control), thereby eliminating the need for external dimming apparatuses
Solution Approach 2:
The dimming control circuitry acts as an intermediary that translates power switch operations into dimming control signals for the LED string. This intermediary component enables communication between the power switch and LED driver, allowing the power switch to control light output without requiring direct connection to dimming control apparatuses
3Adaptability or versatility
If a dedicated apparatus with adjusting buttons or remote control is used, then light output can be controlled, but ease of operation is reduced
Solution Approach 1:
The system uses the existing power switch operations as the basis for dimming control. When users operate the power switch (turning it on/off), the dimming control circuitry automatically detects these operations and generates corresponding dimming control signals. This self-service approach allows users to control light output using the same simple power switch they already have, significantly improving ease of operation compared to dedicated dimming apparatuses with buttons or remote controls
Data Source
AI summary
A controller for controlling dimming of an LED light source includes a control terminal and dimming control circuitry coupled to the control terminal. The control terminal provides a driving signal to control a control switch coupled to the LED light source, thereby controlling the dimming of the LED light source. The dimming control circuitry generates the driving signal according to a set of operations of a power switch that transfers an AC signal. The dimming control circuitry further adjusts the driving signal by counting multiple waves of the AC signal to control the dimming of the LED light source.