Dimmable Light Interface Circuit for NFC-to-PWM Control
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Solution Overview
Problem
Existing systems for controlling equipment using near-field communication face challenges in efficiently converting control or configuration data into interpretable signals without requiring complex and costly microcontrollers, and suffer from noise interference between PWM and RFID circuits.
Innovation Solution
An integrated circuit with a non-volatile memory and state machine logic is used to convert near-field communication data into PWM signals, ensuring unidirectional data flow and incorporating noise suppression measures to minimize interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If microcontrollers are used to convert near-field communication data into control signals, then data conversion capability is improved, but device complexity and cost increase
Solution Approach 1:
The patent extracts the data conversion function from a microcontroller and implements it using dedicated state machine logic circuits. This separation removes the need for complex microcontroller software, reducing device complexity while maintaining data conversion capability. The state machine logic is hardwired to perform specific conversion tasks without requiring general-purpose processing.
Solution Approach 2:
The patent replaces the software-based microcontroller system with a hardware-based state machine logic system. This substitution eliminates the need for program storage, execution, and interpretation, simplifying the device architecture. The hardware logic directly converts near-field communication data into PWM control signals through dedicated circuit pathways.
2Area of stationary object
If PWM and RFID circuits are integrated in close proximity, then surface area is reduced, but noise interference increases
Solution Approach 1:
The patent extracts the PWM generation function into a separate dedicated circuit module, physically separated from the RFID near-field communication circuit. This spatial separation reduces electromagnetic noise interference between the two circuits while maintaining integration benefits. The PWM circuit and RFID circuit operate in distinct physical zones within the device.
Solution Approach 2:
The patent introduces a buffer or isolation circuit between the RFID circuit and PWM circuit to mediate their interaction. This intermediary element reduces noise coupling while allowing functional integration. The buffer circuit acts as a shield, preventing electromagnetic interference from the PWM switching operations from affecting the sensitive RFID communication.
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
This solution reduces the need for microcontrollers, lowers costs, minimizes noise interference, and provides accurate control of equipment parameters with improved efficiency and reduced surface area.
Implementation Method 1
a first circuit capable of receiving at least one control set point by near-field radio frequency communication
Implementation Method 2
a second circuit for generating one or a plurality of electric signals in pulse width modulation (PWM)
Data Source
AI summary
Control over the operation of a dimmable light is supported by an interface circuit between the dimmable light and a near-field radio frequency communication controller. The interface circuit includes a first circuit that receives at least one control set point through a near-field radio frequency communication issued by the near-field radio frequency communication controller. A second circuit of the interface generates one or more electric signals in pulse width modulation based on the control set point.