Foldable Cover Detection Using Magnetic Arrays
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Solution Overview
Problem
Portable electronic devices face challenges in accurately and reliably determining the presence and configuration of accessory devices, such as protective covers, due to limited space for attachment mechanisms and the need for efficient power management.
Innovation Solution
A foldable accessory device with a connector assembly and hinge mechanism that allows it to pivotally attach to a host device, using sensors like Hall Effect sensors and magnetic arrays to detect spatial relationships and operational states, enabling the device to adjust its operation based on the cover's configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a substantial portion of the electronic device is dedicated to display to improve visual content presentation, then the display area is increased, but the space available for attachment mechanisms is reduced
Solution Approach 1:
The patent transitions from mechanical attachment mechanisms operating in two dimensions to magnetic field-based detection operating in three-dimensional space. Magnetic sensors detect the presence and configuration of the protective cover through magnetic field interactions, eliminating the need for physical attachment mechanism space and enabling full display area utilization.
2Use of energy by moving object
If the display is rendered temporarily inoperable when covered to save power, then energy consumption is reduced, but the ability to detect accessory device configuration is compromised
Solution Approach 1:
The magnetic sensors continuously monitor the magnetic field environment in advance, detecting the presence and configuration of the protective cover before the display needs to be activated. This preliminary detection enables the system to determine accessory device configuration even when the display is inoperable, maintaining detection accuracy while preserving energy.
3Measurement precision
If magnetic sensors and magnetic arrays are used to detect spatial relationships, then detection accuracy is improved, but device complexity increases
Solution Approach 1:
The magnetic array embedded in the protective cover serves a dual function: it enables the sensors to detect the cover's presence, configuration, and even identifies specific characteristics of the accessory device. The magnetic field naturally provides spatial relationship information without requiring additional complex detection systems, as the magnetic array itself carries the identification information.
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 accurate detection of the accessory device's configuration, allowing the host device to operate accordingly, conserve power by rendering the display viewable only when necessary, and enhance user interaction through capacitive and optical sensing.
Implementation Method 1
The processor can include a Hall Effect sensor that can detect a magnetic field generated by a magnetic array
Implementation Method 2
The magnetic array can include a number of magnets arranged in a magnetic array that can be detected by the Hall Effect sensor
Implementation Method 3
The accessory device can include capacitive elements arranged in a capacitive array, and the electronic device can include a multi-touch circuit that can detect the capacitive array
Data Source
AI summary
A tablet device determines a spatial relationship between the tablet device and a protective cover. The tablet device operates in accordance with the spatial relationship.