Dynamic Power Control for Electronic Device Interfaces
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Solution Overview
Problem
Current display systems with data transmission interfaces like HDMI and USB require main control chips to remain powered on continuously, leading to increased system power consumption and resource wastage, as they wait for handshake signals from external devices.
Innovation Solution
An electronic device with a control method that detects an external device accessing its interface, determines if it's a multimedia signal source, and powers on the multimedia output controller only when necessary, switching to a mode where it functions as a multimedia output terminal, converting received data based on the target display area, thereby reducing unnecessary power usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the main control chip remains powered on continuously to wait for handshake signals, then the responsiveness to external devices is improved, but the system power consumption increases
Solution Approach 1:
The patent implements dynamic power management by switching the main control chip between powered-on and powered-off states based on whether an external device is detected. The chip is powered on only when needed (when USB or HDMI connection is detected) and powered off during idle periods, making the system's operational state dynamic rather than static.
Solution Approach 2:
The system performs periodic detection of external devices through detection interfaces and uses this periodic information to control the power state of the main control chip. The detection occurs at specific intervals or events (connection detection), and the power state is adjusted accordingly, creating a periodic check-and-respond operation pattern.
2Loss of time
If the main control chip is powered on all the time, then the system can immediately respond to external device connections, but resources are wasted
Solution Approach 1:
The patent employs preliminary detection action through detection interfaces that continuously or periodically check for external device connections before the main control chip needs to respond. This preliminary detection allows the system to prepare for upcoming operations by knowing in advance when an external device will connect, enabling timely power state transitions without delaying the actual response.
3Productivity
If the multimedia output controller is powered on continuously, then multimedia data can be processed immediately, but power consumption increases
Solution Approach 1:
The multimedia output controller's power state is dynamically adjusted based on the operational mode of the electronic device. When the device is in computer mode, the controller remains powered on to process multimedia data immediately. When switched to tablet mode without external devices, the controller is powered off to save energy, creating a dynamic adaptation to operational requirements.
4Reliability
If the system maintains continuous power to control chips, then interface handshaking can occur without delay, but system efficiency decreases
Solution Approach 1:
The system uses detection interfaces that operate independently to monitor for external device connections. These detection interfaces self-service the function of identifying when the main control chip should be powered on, eliminating the need for continuous power while maintaining reliable detection capability. The detection subsystem serves itself without requiring the main control chip to remain active.
Data Source
AI summary
A control method applied to an electronic device includes, in response to detecting that a first interface of the electronic device is accessed to an external device, determining whether the external device is a signal source device of a multi-media signal source, in response to the external device being the signal source device of the multi-media signal source, controlling a multi-media output controller of the electronic device to power on, and controlling the electronic device to switch to a first mode, in the first mode, the electronic device being controlled to be a multi-media output terminal of the external device. In the first mode, the multi-media output controller receives first multi-media data of the external device. First display data of the first multi-media data is converted into a second display signal based on a size of a target display area of a display of the electronic device.