Universal PWM Control IC for Multi-Dimmer Lighting Adaptability
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Solution Overview
Problem
Manufacturers face increased storage and manufacturing costs due to the need for a large variety of lighting devices equipped with different types of dimmers to meet diverse client requirements.
Innovation Solution
A PWM signal generating system and light device driving system that incorporate a PWM signal generating circuit, control IC, phase cutting dimmer, current detecting circuit, and voltage level dimmer, along with an auxiliary activate circuit and RC filter, allowing for the generation and control of PWM signals to accommodate multiple dimmer types, thereby reducing the need for multiple lighting devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If manufacturers prepare a large number of lighting devices with different kinds of dimmers to meet different client requirements, then the adaptability to different client needs is improved, but the storage cost and manufacturing cost are greatly increased
Solution Approach 1:
The patent implements a universal lighting device that can work with multiple dimmer types (Triac, voltage level control, wireless, PWM control) through a single integrated control IC. The control IC includes a mode selecting circuit that can identify and adapt to different dimmer types, allowing one device design to serve multiple client requirements without increasing manufacturing complexity or cost
2Adaptability or versatility
If manufacturers prepare a large number of lighting devices with different kinds of dimmers to meet different client requirements, then the adaptability to different client needs is improved, but the storage cost and manufacturing cost are greatly increased
Solution Approach 1:
The patent implements a universal lighting device that can work with multiple dimmer types (Triac, voltage level control, wireless, PWM control) through a single integrated control IC. The control IC includes a mode selecting circuit that can identify and adapt to different dimmer types, allowing one device design to serve multiple client requirements without increasing manufacturing complexity or cost
3Adaptability or versatility
If multiple lighting devices with different dimmers are prepared, then the variety of dimmer types supported is improved, but the device complexity increases
Solution Approach 1:
The patent merges multiple dimmer support functionalities into a single control IC with an integrated mode selecting circuit. Instead of having separate circuits for each dimmer type, the system combines Triac, voltage level control, wireless, and PWM control capabilities within one unified controller that automatically identifies and adapts to the connected dimmer type, thereby reducing overall device complexity
Data Source
AI summary
A PWM signal generating system comprising: a PWM signal generating circuit, configured to generate a PWM signal; a control IC, configured to control a PWM ratio of the PWM signal via controlling the PWM signal generating circuit; a phase cutting dimmer, configured to output a phase cutting signal to the control IC according to a phase of an input signal; a current detecting circuit, configured to provide a detect current corresponding to the PWM ratio; and a voltage level dimmer, configured to generate a preliminary PWM ratio control signal corresponding to an input voltage level. The control IC controls the PWM ratio to correspond to the phase of the input signal, according to the detect current in a first mode. The control IC controls the PWM ratio according to the preliminary PWM ratio control signal in a second mode.