Electronic Apparatus Wireless Power Control via Open-Closed Sensor
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Solution Overview
Problem
Detachable PCs face issues with wireless communication performance deterioration due to unnecessary reduction in transmission output when a proximity sensor detects the keyboard dock instead of a human body, leading to potential heating effects on humans.
Innovation Solution
Incorporating a system with a first sensor to detect object approach and a second sensor to determine the open or closed state, the circuitry reduces wireless communication power only when the first sensor detects human proximity and not when the second sensor indicates a change from an open to a closed state, preventing false proximity detection by the keyboard dock.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a proximity sensor is used to detect human body approach and control transmission output, then radio wave safety is improved, but wireless communication performance deteriorates when the sensor falsely detects the keyboard dock instead of a human body
Solution Approach 1:
An open/closed sensor is introduced as an intermediary device to distinguish between the keyboard dock and human body. The sensor detects whether the display is closed while fixed to the docking port, providing additional information that helps the control unit differentiate between false proximity detections (keyboard dock) and true proximity detections (human body), thereby preventing unnecessary transmission output reduction while maintaining safety.
2Adaptability or versatility
If the display can be fixed to the docking port either face up or face down to enable reverse tablet mode, then device versatility is improved, but false proximity detection occurs when the display is laid on the keyboard dock
Solution Approach 1:
The open/closed sensor acts as an intermediary that detects the display's closed state regardless of orientation. By combining this state information with proximity sensor data, the system can distinguish between the keyboard dock (when display is closed in reverse tablet mode) and human body proximity, maintaining measurement precision while preserving device versatility.
Solution Approach 2:
The proximity sensor system is enhanced with multi-functionality by integrating open/closed sensor detection. This combined system serves multiple functions: detecting human body proximity for safety control, identifying reverse tablet mode operation, and preventing false detections, thereby maintaining accuracy across diverse usage scenarios.
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 ensures that wireless communication output is controlled accurately, preventing unnecessary power reduction and maintaining performance while ensuring safety standards are met, thereby reducing the risk of heating effects on humans.
Implementation Method 1
A capacitor is formed of two parallel plates in which a detection surface of the sensor is one electrode and an object to be detected (human body) is the other electrode, and the proximity of the object to be detected can be detected on the basis of capacitance between the electrodes.
Data Source
AI summary
According to one embodiment, an electronic apparatus includes a first unit and circuitry. The first unit includes first and second sensors and a wireless device. The first sensor detects approach of an object. The second sensor detects whether the first unit is open or closed. The circuitry reduces transmission power of the wireless device when the first sensor detects approach of the object, and not to reduce transmission power when the second sensor detects a change from an open state to a closed state and the first sensor detects approach of the object.