MEMS Magnetic Sensor Credit Card Data Capture
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Solution Overview
Problem
Touch screen devices face issues with multi-touch accuracy, accidental input detection, lack of tactile feedback, and increased user interaction requirements due to limitations in resistive and capacitive sensors, which affect typing efficiency and user experience.
Innovation Solution
Incorporating physical sensors, such as MEMS magnetic field sensors and accelerometers, into touch screen devices to detect the force and type of touch, allowing for more precise input recognition and providing tactile feedback through physical perturbations, such as changes in position or magnetic fields, to enhance user interaction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If capacitive-based touch screens are used to enable multi-touch detection, then the ability to sense individual finger locations is improved, but accidental swipes are still sensed as user inputs causing errors
Solution Approach 1:
The patent changes the parameter being measured from binary touch detection to force magnitude detection. By measuring the magnitude of force applied to the touch screen, the system can distinguish between intentional presses (higher force) and accidental swipes (lower force), thereby improving reliability while maintaining multi-touch detection capability
Solution Approach 2:
The patent implements feedback by providing tactile sensation to the user through vibration or haptic response. This feedback mechanism allows users to confirm intentional inputs while filtering out accidental touches, as accidental swipes typically generate different vibration patterns or force magnitudes compared to deliberate presses
2Device complexity
If resistive-based sensor networks are used for touch detection, then device complexity is reduced, but multi-touch accuracy deteriorates and only one finger can be detected at a time
Solution Approach 1:
The patent makes the touch screen sensor network universal by enabling it to detect both single-touch and multi-touch scenarios with the same hardware infrastructure. The force-sensitive sensor network can handle various touch types (single finger, multiple fingers, stylus) without requiring separate detection mechanisms, thereby maintaining simplicity while improving multi-touch capability
3Measurement precision
If capacitive-based touch screens are used, then multi-touch capability is improved, but the user must constantly monitor automatic predictions which interferes with text-entry efficiency
Solution Approach 1:
The patent changes from binary touch detection to force magnitude detection, enabling the system to distinguish between intentional typing presses and accidental hovers. By setting force thresholds, the system can automatically filter out accidental touches without requiring spelling prediction software, thereby improving text-entry efficiency while maintaining accurate finger location sensing
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 enables accurate multi-touch detection, reduces accidental inputs, and provides tactile feedback, improving typing efficiency and user experience by allowing devices to sense the force and type of touch, thereby enhancing interaction with virtual interfaces.
Implementation Method 1
a MEMS magnetic field sensor configured to sense magnetic data stored on a magnetic stripe of the credit card
Implementation Method 2
one or more physical sensors, such as a magnetometer or an accelerometer
Data Source
AI summary
A computer implemented method for processing data stored on a magnetic stripe of a user medium performed by a hand-held computer system includes displaying an alignment GUI on a display of the computer system, wherein the GUI includes a visual alignment mark on the display at a first offset relative to a MEMS magnetic field sensor in the computer system, wherein when a user aligns the user medium to the alignment mark GUI, a portion of a first track of the magnetic stripe is disposed above the MEMS magnetic field sensor, sensing, by the MEMS magnetic field sensor, magnetic data stored on the first track when the user aligns the user medium to the visual alignment mark, and moves the user medium along the visual alignment mark, and determining user data stored on the first track from the magnetic data stored on the first track.