MST Coil Waveform Optimization for Low Power
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Solution Overview
Problem
Conventional electronic devices using magnetic secure transmission (MST) communication require high power to generate large magnetic fields, leading to unreliable electronic payments when power is low.
Innovation Solution
Applying small waveforms to a coil in the electronic device to reduce power consumption while generating a magnetic signal, allowing for low-power data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If high power is applied to the coil to generate large magnetic fields for MST communication, then the magnetic field strength is improved, but the power consumption increases
Solution Approach 1:
The patent changes the waveform parameter from square wave to sinusoidal wave, which fundamentally alters how power is applied to the coil. Sinusoidal waveforms enable more efficient magnetic field generation with lower peak power requirements, directly resolving the contradiction between magnetic field strength and power consumption
Solution Approach 2:
The patent employs periodic sinusoidal waveforms to drive the coil, which allows for more efficient energy transfer compared to square waves. The periodic nature of sinusoidal waves enables smoother magnetic field generation that reduces power consumption while maintaining adequate field strength for MST communication
2Difficulty of detecting and measuring
If high power is applied to the coil to generate detectable magnetic fields, then the magnetic field detectability is improved, but the reliability of electronic payment decreases when power is low
Solution Approach 1:
By changing from square wave to sinusoidal waveform, the system achieves better power efficiency which directly improves payment reliability under low-power conditions while maintaining magnetic field detectability through the optimized waveform characteristics
Solution Approach 2:
The patent substitutes the conventional square wave driving mechanism with a sinusoidal wave driving mechanism, which provides more efficient energy utilization and maintains magnetic field strength at lower power levels, thereby improving both detectability and reliability
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
Enables reliable electronic payment transactions even with limited power by using sinusoidal or other low-power waveforms to generate magnetic fields detectable by POS terminals.
Implementation Method 1
a coil, and a processor. The processor may control the waveform-generating circuit to generate a first voltage or a first current corresponding to payment data. The processor may control the waveform-generating circuit to generate a second voltage or a second current corresponding to payment data
Data Source
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AI summary
An electronic device (101) according to one embodiment of the present disclosure may include a memory (130), a coil, a waveform-generating circuit, and a processor (120), and the processor is configured to: obtain card information stored in the memory (130); when a first part of the card information is a first value, apply, using the waveform-generating circuit, a first voltage or a first current having a first waveform having a first frequency to the coil, wherein a first tangential slope of a first amplitude of the first waveform for time changes in at least a part of a first interval corresponding to the first part; and when a second part of the card information is a second value, apply, using the waveform-generating circuit, a second voltage or a second current having current second waveform having a second frequency to the coil, wherein the second frequency is twice the first frequency, and a second tangential slope of a second amplitude of the second waveform for time changes in at least a part of a second interval corresponding to the second part. In addition, various embodiments are possible.