E-Paper Display Standby Power Control With Dual Processors
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Solution Overview
Problem
Electronic devices consume high standby power due to continuously active RF communication modules, leading to unnecessary power waste, especially in IoT devices.
Innovation Solution
Implementing a dual-power supply system with a main and sub-power supply, controlled by a first and second processor, to switch between general and low power modes based on user usage time, deactivating unnecessary components during low power mode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the RF communication module is continuously activated to provide various functions and enable faster booting, then the device functionality and response speed are improved, but the standby power consumption increases significantly
Solution Approach 1:
The patent divides the processor into two distinct processors: a first processor that handles general device operations and a second processor that specifically manages communication functions (IR and RF modules). This segmentation allows the communication functions to be independently controlled and deactivated when not needed, reducing standby power consumption while maintaining device functionality.
Solution Approach 2:
The patent implements dynamic power management by switching between different power supply modes based on operational requirements. The power supply unit can dynamically connect the main power supply to activate the first processor and RF module, or switch to a low-power state by deactivating these components when not in use, thereby adapting power consumption to actual usage needs.
2Speed
If the electronic device does not provide a power-saving state to minimize booting delay, then the booting speed is maintained, but the standby power consumption increases
Solution Approach 1:
The patent keeps the second processor and communication modules in a pre-initialized but deactivated state during standby, with all necessary software and drivers pre-loaded. When booting is required, the system can quickly activate the second processor and communication functions without needing to load or initialize components from scratch, thus maintaining fast booting speed while enabling power-saving mode during idle periods.
3Ease of operation
If all functions and loads are activated without unnecessary activation, then the device is ready for immediate use, but power waste increases during inactive periods
Solution Approach 1:
The patent implements an automated power management system where the power supply unit autonomously determines when to activate or deactivate the first processor and RF communication module based on operational conditions. The system self-adjusts power distribution without requiring manual user intervention, switching to low-power mode during inactive periods while maintaining readiness to quickly resume full functionality when needed.
Data Source
AI summary
An e-paper display device includes: a main power supply; a sub-power supply; an IR communication module; an RF communication module; a first processor; and a second processor, wherein the first processor is configured to: control the IR communication module and the RF communication module during a general mode of the device, the first processor activated by power supplied by the main power supply, and switch to a low power mode by controlling the sub-power supply to supply power the second processor and controlling the main power supply to stop supply of power to deactivate the first processor and the RF communication module, and the second processor is configured to: control the IR communication module during the low power mode, the second processor activated by power supplied by the sub-power supply, and switch to the general mode by controlling supply of power to the first processor and the RF communication module . . .