Current-Based Power Management for Tablet Modules
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Solution Overview
Problem
Conventional tablet computers face challenges in power management, as their energy-saving mechanisms are disrupted by system crashes or hardware failures, and they cannot activate sleep modes based on operating status, leading to inefficient power usage.
Innovation Solution
A power management method and system that detects the driving current of electronic devices, turns off idle modules when the current is below a set threshold, updates current values based on usage patterns, and activates an energy-saving mode when necessary to conserve power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional operating systems or hardware modules are used to monitor energy saving, then power consumption can be managed, but the monitor process will be terminated when system crash or hardware accidents occur
Solution Approach 1:
The patent extracts the energy saving monitoring function from the operating system and hardware modules, implementing it independently through current detection and comparison operations. This separation ensures that the energy saving function continues to operate even when the OS or hardware modules fail, resolving the contradiction between reliability and system complexity.
Solution Approach 2:
The patent introduces current detection and comparison operations as an intermediary mechanism between the power supply and electronic modules. This intermediary layer provides reliable energy saving monitoring by detecting current levels and controlling module power state based on predetermined thresholds, independent of OS or hardware module status.
2Loss of energy
If sleeping function is activated according to idle time, then power can be saved, but modules that are operating may be forced to turn off
Solution Approach 1:
The patent replaces the time-based sleeping mechanism with a current-based detection mechanism. Instead of using timers to determine idle state, the system directly detects the actual current consumption of modules and compares it with predetermined thresholds. This substitution ensures that modules are only put to sleep when they are truly idle, preventing forced shutdown of operating modules while still achieving power savings.
Solution Approach 2:
The patent implements a feedback mechanism where the actual current consumption of each module is continuously detected and fed back to the power management system. Based on this feedback and comparison with thresholds, the system intelligently controls the power state of modules, ensuring that operating modules are not incorrectly shutdown while idle modules are properly put to sleep to save power.
3Productivity
If all electronic modules are kept on to ensure system responsiveness, then system performance is maintained, but power consumption increases
Solution Approach 1:
The patent implements dynamic power management where the operational state of electronic modules is adjusted based on real-time current detection. Modules are dynamically switched between on and off states according to their actual usage status and predetermined current thresholds, allowing the system to maintain responsiveness when needed while conserving power during idle periods.
Solution Approach 2:
The patent changes the power state parameter of electronic modules based on detected current levels. When the detected current is below a predetermined threshold, the module is turned off to save power; when the current exceeds the threshold, the module is activated to maintain system performance. This parameter-based control resolves the contradiction between productivity and energy consumption.
Data Source
AI summary
A power management method utilizes the steps of reading the driving current; determining if a driving current of an electronic device is less than or equal to a first steady current value for a first period of time; turning off a first electronic module to decrease the driving current when the driving current is less than or equal to the first steady current value for the first period of time; determining if the driving current is within a first judging range for a second period of time; updating the first steady current value with a second steady current value when the driving current is within the first judging range for the second period of time; and determining if the second steady current value is less than or equal to an energy saving set value.