Rotating Display Antenna Orientation for SAR Compliance
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Solution Overview
Problem
Information processing apparatuses, such as tablet PCs, face challenges in satisfying radio wave absorption rate standards when antennas are positioned close to the user's body during tablet mode usage, potentially violating Japanese radio wave regulations.
Innovation Solution
The implementation of a display control function that adjusts the image orientation on the display unit to prevent the antenna from being closest to the user's body, ensuring compliance with radio wave absorption rate standards by controlling the image direction when switching between different usage patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the antenna is positioned in the display unit for wireless communication, then wireless communication capability is improved, but radio wave absorption rate increases when the display unit is close to the user's body
Solution Approach 1:
The patent applies dynamics by making the display unit rotatable relative to the main body through a hinge mechanism. This allows the antenna position to change dynamically as the display unit rotates, enabling the system to adapt between different usage modes (tablet mode with display facing outward, and display unit folded modes with display facing inward or outward). The rotatable connection ensures that the antenna's distance from the user's body varies with the display unit's angle, thus dynamically controlling radio wave absorption.
Solution Approach 2:
The patent changes the spatial parameter (position and orientation) of the display unit containing the antenna. By rotating the display unit to different angles relative to the main body, the patent alters the distance and orientation between the antenna and the user's body, thereby changing the specific absorption rate parameter to comply with regulatory standards while maintaining wireless communication functionality.
2Ease of operation
If the display unit is folded to enable tablet mode with display facing outward, then portability and usage flexibility are improved, but the antenna position may violate radio wave regulations
Solution Approach 1:
The hinge mechanism enables dynamic reconfiguration of the display unit's position. When transitioning to tablet mode, the display unit can be folded to specific angles that position the antenna away from the user's body, dynamically adjusting the system to maintain both ease of operation and regulatory compliance.
Solution Approach 2:
The patent utilizes the spatial dimension created by folding the display unit at an angle rather than keeping it flat. By changing the three-dimensional configuration of the device, the antenna is positioned in a different spatial location relative to the user's body, reducing radio wave absorption while maintaining tablet mode functionality.
3Adaptability or versatility
If multiple usage patterns are supported, then device versatility is improved, but controlling antenna position to maintain compliance becomes more complex
Solution Approach 1:
The single rotatable hinge mechanism provides a unified dynamic solution that handles multiple usage patterns. Rather than requiring separate mechanisms for each usage mode, the continuous rotational capability of the hinge allows the system to transition smoothly between different configurations, simplifying the overall control architecture while supporting diverse usage scenarios.
Data Source
AI summary
According to one embodiment, an information processing apparatus includes a display unit. A display portion is provided in the display unit. An antenna is provided in the display unit and radiates radio waves. When the display unit is used in a usage pattern where the antenna is located in a side of the display unit which side is closest to a user, a controlling unit controls a direction of an image displayed on the display portion not to correspond to a direction of the display unit.