Power Supply Control for Image Processing Devices
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Solution Overview
Problem
Existing power supply control systems for image processing devices lack efficient methods to manage power consumption, particularly in transitioning between operational and sleep modes, leading to unnecessary energy usage and delayed startup times due to inadequate detection of user presence.
Innovation Solution
A power supply control device with a load, detection units, and a transition time determining unit that employs stepwise power supply control, using a pyroelectric sensor for initial detection and an image sensor for authentication, to minimize power consumption and quickly resume operations when a user is present.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by stationary object
If power supply control systems use traditional motion sensors for user presence detection, then power consumption is reduced during sleep modes, but detection accuracy and user authentication capability deteriorate
Solution Approach 1:
The detection system is segmented into multiple independent detection units with different power consumption characteristics. A first detection unit (motion sensor) operates continuously at low power to detect gross movement, while a second detection unit (image sensor) operates intermittently at higher power for detailed authentication. This segmentation allows the system to achieve both low power consumption and high detection accuracy by activating different units based on detection needs.
2Loss of time
If the image processing device transitions quickly from sleep mode to operational mode, then user convenience is improved, but power consumption increases due to premature activation of high-power components
Solution Approach 1:
The first detection unit performs preliminary detection of user presence before activating the second detection unit. This preliminary action allows the system to prepare for quick startup by detecting user approach in advance, then only activating high-power components when actually needed for authentication, thus reducing both startup time and unnecessary power consumption.
Solution Approach 2:
The power supply control system dynamically adjusts the operational state of different detection units based on real-time detection needs. The system transitions from a low-power state with only the first detection unit active to a high-power state with both units active when user presence is detected, and back to low-power state after authentication completes. This dynamic adjustment optimizes the balance between startup speed and power consumption.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution enables the image processing device to maintain minimal power usage during sleep modes while ensuring rapid startup and efficient operation by accurately detecting user presence, thereby balancing energy savings with convenience.
Implementation Method 1
a first detection unit 28A that detects, with a pyroelectric sensor, presence or absence of a user in a first detection area
Implementation Method 2
a second detection unit 30A that detects, with an image sensor, an image of the user when the user is present in a second detection area
Data Source
AI summary
There is disclosed a power supply control device including a load that executes a predetermined process and operates when power is supplied; a power supply state transition controlling unit that allows at least the load to be transitioned to a power supply state, or a power interruption state; plural detection units that can operate within respective power-consumption ranges, and detects information related to the execution of the load; a power supply control unit for detection unit, which supplies power continuously to a minimum power-consumption type detection unit, and which supplies power to a detection unit having a relatively large power-consumption based on a detection result of a detection unit having a relatively small power-consumption; and a transition time determining unit that is executed when power is supplied with respect to a maximum power-consumption type detection unit, and that determines a transition time by the power supply state transition controlling unit.