Dimming Interface Control Circuit for DALI and Push-Button Modes
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing DALI dimming interface circuits suffer from low accuracy, high susceptibility to temperature drifts, and complex peripheral circuitry, particularly in low-accuracy voltage detection and overvoltage protection, which limits their consistency and cost-effectiveness.
Innovation Solution
A dimming interface control circuit compatible with multiple dimming modes, including DALI and push-button dimming, featuring a transmission control module, reception control module, and push-button dimming control module, utilizing MOS transistors and bandgap reference voltage sources to simplify circuitry, enhance accuracy, and provide overvoltage protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a standalone triode component is used for voltage detection and overvoltage protection, then the circuit can be implemented with simple components, but the measurement precision and temperature stability deteriorate
Solution Approach 1:
The patent merges the voltage detection function and overvoltage protection function into a single integrated circuit chip. The chip contains both the detection module (with first comparison circuit) and protection module (with second comparison circuit and control switch) integrated together, eliminating the need for separate standalone triode components while achieving both high precision and temperature stability.
Solution Approach 2:
The patent introduces an intermediary integrated circuit chip that acts as a mediator between the simple component approach and high precision requirements. The chip internally implements complex precision detection circuits while presenting a simple external interface, serving as an intermediary solution that bridges component simplicity and measurement precision.
2Device complexity
If a standalone triode component is used for voltage detection, then the circuit structure remains simple, but temperature drift susceptibility increases
Solution Approach 1:
The patent combines temperature compensation circuits and stable reference voltage sources within the integrated chip structure. The detection module uses internally compensated comparison circuits that maintain consistent performance across temperature variations, achieving temperature stability without increasing external circuit complexity.
Solution Approach 2:
The patent employs parameter changes in the form of internally compensated comparison circuits with optimized threshold voltages and reference parameters. The chip internally adjusts operating parameters to compensate for temperature effects, maintaining stable detection thresholds across different temperature conditions without requiring external temperature compensation components.
3Adaptability or versatility
If separate components are used for voltage detection and overvoltage protection, then component selection is flexible, but the overall circuit complexity increases
Solution Approach 1:
The patent merges multiple functions (voltage detection, overvoltage protection, threshold comparison, and control switching) into a single integrated circuit chip. This consolidation eliminates the need for multiple separate components and their interconnections, significantly reducing peripheral circuitry complexity while maintaining design flexibility through the chip's integrated functionality.
Solution Approach 2:
The integrated circuit chip performs multiple functions universally - it simultaneously provides voltage detection, overvoltage protection, and control switching capabilities. The chip can be configured for different voltage thresholds and protection levels through internal programming or external pins, providing versatility without requiring different component selections for different functions.
4Ease of manufacture
If traditional voltage detection methods are used, then the implementation is straightforward, but consistency across different operating conditions deteriorates
Solution Approach 1:
The patent combines consistent reference voltage sources, temperature-compensated comparison circuits, and protected control switches into a single integrated chip. This integration ensures that all components operate under consistent electrical and thermal conditions, improving reliability and operational consistency across different working conditions while maintaining straightforward implementation through the unified chip interface.
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 achieves higher accuracy, reduced temperature drift susceptibility, improved consistency, and increased surge immunity, enabling effective operation in both DALI and push-button dimming modes with fewer peripheral components and lower costs.
Implementation Method 1
utilizing MOS transistors and bandgap reference voltage sources to simplify circuitry, enhance accuracy, and provide overvoltage protection
Implementation Method 2
a first power supply module coupled to each of an energy-storage capacitor, the DALI bus, the transmission control module, the reception control module and the push-button dimming control module
Implementation Method 3
utilizing MOS transistors and bandgap reference voltage sources to simplify circuitry, enhance accuracy, and provide overvoltage protection
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
A dimming interface control circuit compatible with multiple dimming modes and a dimming system are disclosed. The dimming interface control circuit is coupled to both a DALI bus and a DALI control gear, includes a first power supply module, a transmission control module, a reception control module and a push-button dimming control module and is compatible with both DALI dimming and push-button dimming modes. Associated peripheral circuitry for the dimming interface control circuit can be simplified to be more consistent and include fewer peripheral components, compared to existing interface circuits consisting of standalone components. Additionally, signal path(s) in the transmission control module and/or reception control module may be switched on and off using MOS transistor(s), resulting in higher accuracy, less susceptibility to temperature drifts and better consistency. Further, apart from transmission of a push-button dimming signal, an overvoltage protection circuit may be integrated in the push-button dimming control module to impart overvoltage protection ability to the chip, which enables the chip to withstand high voltage required by push-button dimming.