Hall IC Driving Shield Magnet for Mobile Terminal Case
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Solution Overview
Problem
Conventional cellular phone cases lack integrated functions that enhance user convenience beyond protection and aesthetics, failing to provide additional operational capabilities for the phone.
Innovation Solution
Incorporating a Hall IC driving shield magnet with a specific structure, comprising a permanent magnet and a yoke, into the cellular phone case to automatically operate the phone when the case is opened or closed, thereby enhancing user convenience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional protective case is used, then the phone exterior is protected, but no additional operational functions are provided
Solution Approach 1:
The patent combines the protective case with a Hall IC driving magnet system, merging the protective function with the operational control function into a single integrated unit. The magnet is embedded within the case structure, allowing the case to both protect the phone and trigger automatic power on/off operations.
Solution Approach 2:
The case is designed to perform multiple functions: physical protection of the phone exterior and automatic power control through the Hall IC magnet system. This multi-functionality allows a single component (the case) to serve both protective and operational purposes.
2Extent of automation
If a magnet is placed near the Hall IC, then automatic operation is enabled, but magnetic force may cause misoperation when the case is bent
Solution Approach 1:
The yoke is strategically positioned to create localized magnetic field distribution. It shields the magnetic field in certain directions (toward the rear surface) while allowing it to act effectively in other directions (toward the Hall IC when the case is open), providing direction-dependent magnetic control.
Solution Approach 2:
The yoke acts as an intermediary between the magnet and the magnetic field environment. It modifies and directs the magnetic field lines, preventing direct magnetic interaction when the case is closed while enabling interaction when opened, thus mediating between the magnet and the Hall IC.
3Volume of moving object
If a small magnet is used to drive the Hall IC, then the case structure remains compact, but the magnetic force may be insufficient without a yoke
Solution Approach 1:
The yoke serves as a magnetic mediator that amplifies and directs the magnetic field from the small magnet. It concentrates the magnetic flux toward the Hall IC when needed, enabling a compact magnet to generate sufficient effective magnetic force for reliable Hall IC operation.
Solution Approach 2:
The yoke changes the magnetic field parameters (distribution, concentration, direction) without requiring a larger magnet. By modifying the magnetic circuit through the yoke's high permeability material, the system achieves enhanced magnetic force effectiveness while maintaining compact dimensions.
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 allows for automatic phone operation with increased user convenience, utilizing a small magnet to drive the Hall IC and preventing misoperation by shielding magnetic forces effectively, allowing the phone to turn on/off with case opening/closing.
Implementation Method 1
a shield magnet implemented through a permanent magnet and a yoke is configured to be incorporated at a point of a front surface part of the cellular phone case corresponding to a Hall IC incorporated in the cellular phone
Implementation Method 2
a Hall IC, which applies a sensing signal for operating a device in a mobile communication terminal such as a smart phone or a tablet PC, is incorporated along with a shield magnet having a specific structure, which is used to drive the Hall IC
Implementation Method 3
One of the poles of the shield magnet is sealed by the yoke, and the magnetic force is reduced (shielded) to have a strength in the range of 20 to 96% in the closed pole covered by the yoke
Data Source
AI summary
The present invention relates to a mobile terminal and a corresponding case with a shield magnet for driving a Hall IC of the terminal, in which the case can be used to automatically operate the mobile terminal simultaneously with opening and closing the case by utilizing the magnetic force of the shield magnet which is composed of a yoke and a permanent magnet and attached to the case.