Computer System Power State Management for Battery Life
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Solution Overview
Problem
In modern standby states of information processing apparatuses, computing operations are not fully stopped, leading to unexpected increases in power consumption and reduced battery life.
Innovation Solution
The information processing apparatus is configured to switch between a normal state, a first low power state, and a second low power state, with the system state controlled based on operating time. When in the first low power state and actual power consumption exceeds a predetermined reference value, the system state is changed to the second low power state, which has even lower power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If the system maintains modern standby state for extended period, then the operational duration is extended, but power consumption unexpectedly increases and battery life is reduced
Solution Approach 1:
The system continuously monitors actual power consumption during modern standby state and compares it against expected consumption values. When actual consumption exceeds expected levels, the system automatically transitions to hibernation state. This feedback mechanism resolves the contradiction by enabling extended operational duration while preventing excessive power consumption through real-time monitoring and adaptive state management.
Solution Approach 2:
The system dynamically adjusts its power state between modern standby and hibernation based on real-time power consumption conditions. Rather than fixed state management, the system flexibly transitions between states to optimize both operational duration and power consumption, resolving the contradiction through adaptive state management.
2Use of energy by moving object
If the system enters hibernation state to reduce power consumption, then power consumption is reduced, but return time to active state increases
Solution Approach 1:
The system applies partial action by using hibernation state only when necessary (when power consumption exceeds thresholds), rather than continuously. This allows significant power savings during high-consumption periods while avoiding the full time penalty of hibernation during normal operation, thus optimizing the balance between power consumption and return time.
Solution Approach 2:
The system changes the operational parameter (power state) based on real-time conditions. By transitioning between modern standby and hibernation states according to power consumption levels, the system optimizes both power savings and return time, resolving the contradiction through parameter-based adaptive management.
Data Source
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AI summary
An object is to secure an opportunity to use a battery while maintaining a remaining capacity of the battery. A power supply circuit is configured to convert power supplied from a power source into operating power and to supply the operating power to a computer system, and the computer system is configured to switch an operating state among a normal state, a first low power state in which power consumption is lower than power consumption in the normal state, and a second low power state in which power consumption is lower than the power consumption in the first low power state, and to change the system state to the second low power state when the system state is the first low power state and an actual measurement value of power consumption is greater than a predetermined reference value.