Electronic Device Cross-Device Control Priority Management
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Solution Overview
Problem
In image recording devices with multiple interfaces like USB and HDMI, simultaneous connections to a personal computer and an image display device lead to complicated control scenarios, resulting in interrupted HDMI control and reduced user convenience.
Innovation Solution
An electronic device with a general-purpose serial bus interface and a multimedia interface is equipped with a control unit that prohibits cross-device control when an external device is connected via the serial bus interface, ensuring seamless operation by prioritizing USB or HDMI control based on user selection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the image recording device is connected to both a personal computer via USB and an image display device via HDMI simultaneously, then the device can be controlled from multiple hosts, but control becomes complicated and HDMI control is interrupted
Solution Approach 1:
The patent implements dynamic switching of control modes based on connection status. When a USB connection is detected, the system automatically transitions from HDMI CEC control mode to USB control mode, and vice versa. This dynamic adaptation resolves the contradiction by allowing multi-host capability while maintaining simple control through automatic mode switching based on which host is currently connected.
2Device complexity
If HDMI control is interrupted when USB is connected, then control complexity is reduced, but user convenience is reduced because the image display device ceases displaying
Solution Approach 1:
The patent ensures continuous useful action by maintaining the image display function throughout connection transitions. When switching between USB and HDMI connections, the system preserves the display output continuity and automatically re-establishes the appropriate control mode without interrupting the user experience. This resolves the contradiction by keeping control simple while preventing display interruption through continuous operation maintenance.
3Ease of operation
If the system automatically switches control priority between USB and HDMI, then user convenience is improved, but control logic becomes more complex
Solution Approach 1:
The patent implements self-service control logic where the system automatically detects connection status and switches control modes without user intervention. The control unit monitors USB and HDMI connection states and autonomously determines which interface should have priority, eliminating the need for manual user configuration. This resolves the contradiction by improving user convenience through automation while containing logic complexity within the system's automatic detection and switching mechanisms.
Data Source
AI summary
An electronic device provided with a multimedia interface having a cross-device control function and a general-purpose serial bus interface is provided with a control unit that prohibits the use of the cross-device control function whenever an external device is connected via the general-purpose serial bus interface during a state permitting control by the cross-device control function from an image display device connected via the multimedia interface.