EMR Sensor Pad for Electronic Pen Detection in Slim Devices
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Solution Overview
Problem
Conventional electronic devices with built-in pen detection mechanisms require additional components, which increases size and complexity, and consume more power, contradicting modern design trends favoring slim designs and efficient power management.
Innovation Solution
Incorporating an ElectroMagnetic Resonance (EMR) sensor pad that detects the resonance frequency of an electronic pen's coil body when inserted, eliminating the need for additional detection components and optimizing power usage by selectively activating the sensor pad based on pen usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional detection mechanisms (hall sensor, switching device) are used to detect electronic pen insertion, then detection reliability is improved, but device size increases due to additional component mounting spaces
Solution Approach 1:
The EMR sensor pad is designed to serve dual purposes: it functions as a sensing element for detecting electronic pen insertion through electromagnetic resonance, and simultaneously serves as part of the display structure. This multi-functionality eliminates the need for separate detection components, resolving the contradiction between reliable detection and compact device size.
Solution Approach 2:
The patent replaces mechanical detection mechanisms (hall sensors, switching devices) with an electromagnetic field-based detection system. The EMR sensor pad uses electromagnetic resonance to detect the presence of the electronic pen, substituting mechanical components with a field-based approach that requires no additional physical mounting space, thereby maintaining detection reliability while minimizing device size.
2Measurement precision
If conventional detection mechanisms are continuously active to ensure accurate pen insertion detection, then measurement precision is improved, but power consumption increases
Solution Approach 1:
The EMR sensor pad operates in a periodic manner rather than continuously. The system activates the sensor pad only when pen insertion is detected or when the device transitions to a state where pen detection is relevant, rather than maintaining continuous operation. This periodic activation maintains detection precision while significantly reducing overall power consumption compared to continuous operation of conventional detection mechanisms.
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 minimizes the electronic device's size and power consumption while accurately detecting pen insertion and usage, enhancing efficiency and design compactness.
Implementation Method 1
When the electronic pen is mounted in the pen mounting space, the EMR sensor pad may detect a resonance frequency of a coil body of the electronic pen
Data Source
AI summary
An electronic device can include a housing including a first surface, a second surface, and a third surface, the first and second surface defining an electronic component mounting space and the second and third surface defining a pen mounting space adapted to receive an electronic pen; and a display and an ElectroMagnetic Resonance (EMR) sensor pad disposed in the electronic component mounting space. When the electronic pen is mounted in the pen mounting space, the EMR sensor pad may detect a resonance frequency of a coil body of the electronic pen.