Keyboard Position Detection via Electromagnetic Coupling Strength
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Solution Overview
Problem
Conventional information processing systems face challenges in providing flexible input/output control based on the positional relationship between an information processing device and an external keyboard, particularly when the keyboard is used in conjunction with a foldable display unit.
Innovation Solution
The system includes an external keyboard with an incoming coil and an information processing device featuring a feeding coil for electromagnetically induced coupling, allowing the detection of positional relationships and adaptive adjustment of the display area based on coupling strength, enabling more flexible input/output operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the keyboard position is fixed or manually adjusted, then the system structure is simple, but the input/output control flexibility is poor
Solution Approach 1:
The patent replaces manual mechanical adjustment of keyboard position with electromagnetic coupling detection. The feeding coil in the display unit creates an electromagnetic field that couples with the incoming coil in the keyboard, allowing automatic detection of positional relationships without mechanical sensors or manual adjustment mechanisms.
Solution Approach 2:
The system automatically detects keyboard position and adjusts display settings without user intervention. The electromagnetic coupling strength self-indicates the positional relationship, and the control unit automatically processes this information to optimize the display area, making the system self-configuring.
2Measurement precision
If electromagnetic coupling detection is implemented, then the positional relationship detection accuracy is improved, but the device complexity increases
Solution Approach 1:
The electromagnetic coupling mechanism serves multiple functions simultaneously: it provides wireless power transmission to the keyboard and enables positional detection. The same feeding coil that charges the keyboard also detects its position through coupling strength measurement, eliminating the need for separate detection hardware.
Solution Approach 2:
The system detects position changes by monitoring variations in electromagnetic coupling strength parameters. As the keyboard moves relative to the display unit, the coupling coefficient changes, providing continuous positional information without requiring complex sensor arrays.
3Ease of operation
If the display area is dynamically adjusted based on keyboard position, then the user interaction flexibility is improved, but the control system complexity increases
Solution Approach 1:
The system establishes a feedback loop where the control unit continuously monitors electromagnetic coupling strength, determines keyboard position, and automatically adjusts the display area accordingly. This closed-loop control provides adaptive user experience without requiring manual configuration.
Solution Approach 2:
The display area is made dynamically adjustable based on real-time keyboard position detection. The system transitions from static display configuration to dynamic adaptation, where the visible display region automatically optimizes based on the detected keyboard location and coupling strength.
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 enables more flexible input/output control by accurately detecting the positional relationship between the keyboard and the information processing device, allowing for dynamic adjustments to the display area and improved user interaction.
Implementation Method 1
a feeding coil disposed below the planar portion and configured to supply electricity to the incoming coil by an electromagnetically induced coupling
Implementation Method 2
a position detector configured to detect a positional relationship between the planar portion and the keyboard based on a coupling strength of the electromagnetically induced coupling between the feeding coil and the incoming coil
Data Source
AI summary
Systems that detect a positional relationship between an informal processing device and an external keyboard are disclosed. A system includes an external keyboard including a first communication unit, an incoming coil disposed inside thereof, and an input controller configured to control the first communication unit to transmit operating information indicating an input operation from a user, information processing device including a second communication unit configured to communicate with the first communication unit, a planar portion on which the keyboard is mountable, and a feeding coil disposed below the planar portion, the feeding coil configured to supply electricity to the incoming coil by an electromagnetically induced coupling, and a position detector configured to detect a positional relationship between the planar portion and the keyboard based on a coupling strength of the electromagnetically induced coupling between the feeding coil and the incoming coil. Similar apparatus and methods are also provided.