Power Control Device for Image Processing with Presence Detection
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Solution Overview
Problem
Existing power controlling devices for image processing systems are inefficient in managing power consumption, particularly in transitioning between operational and sleep modes, leading to unnecessary energy usage when not in use or when a user is absent.
Innovation Solution
A power controlling device with a detecting unit, a first imaging unit, and a second imaging unit that detects user presence and activates only necessary components when a user approaches, performing face authentication and optimizing power usage by shifting to sleep mode when the user is absent, thereby reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the system remains in operating state to ensure immediate response to user authentication, then user authentication speed is improved, but power consumption increases
Solution Approach 1:
The system dynamically transitions between operating state and sleep state based on user presence detection. When a user is detected by the detecting unit, the system shifts to operating state for immediate authentication. When no user is present, the system enters sleep state to conserve power, thus adaptively optimizing both response speed and power consumption.
Solution Approach 2:
The detecting unit continuously monitors for user presence in advance before authentication is needed. This preliminary detection allows the system to proactively transition to the operating state before authentication is requested, ensuring immediate response without keeping the system continuously active, thereby reducing overall power consumption.
2Productivity
If all components are activated to ensure system readiness, then system responsiveness is improved, but power consumption increases
Solution Approach 1:
The system segments components into different activation groups: the detecting unit operates continuously in low-power mode, while imaging units and processing units are activated only when user presence is detected. This segmentation allows critical detection functions to remain ready while expensive-to-activate components sleep, optimizing the balance between responsiveness and power consumption.
Solution Approach 2:
Instead of continuous activation, the system uses periodic activation of imaging and processing units triggered by detection events. The detecting unit periodically checks for user presence, and only when detected does it trigger the periodic activation of higher-power components, creating an event-driven activation pattern that maintains responsiveness while reducing power consumption.
3Use of energy by moving object
If the system transitions to sleep mode to reduce power consumption, then power efficiency is improved, but system activation time increases
Solution Approach 1:
The detecting unit performs preliminary continuous monitoring even in sleep state, so user presence is detected before full system activation is needed. This preliminary detection eliminates waiting time by ensuring the system transitions to operating state immediately upon user arrival, rather than requiring full system wake-up from a completely dormant state.
Solution Approach 2:
The system implements dynamic state transitions with multiple intermediate levels rather than a single sleep/awake binary. The detecting unit remains in a light-active state during sleep mode, enabling faster transition to full operating state compared to a complete shutdown, thus dynamically optimizing the balance between power savings and activation speed.
Data Source
AI summary
A power controlling device includes a detecting unit that detects a person in a detection area, a first imaging unit that takes an image of the person in a detecting range in an operating state, a second imaging unit that takes an image of a face of the person for use in user authentication in an operating state, and a power controller that supplies power to and brings the first imaging unit into the operating state if the person is detected, supplies power to and brings a processing unit that performs a process into an operating state if the approach of the person is determined on the basis of the taken image of the person, and supplies power to an brings the second imaging unit into the operating state during a period from the detection of the person to the shift of the processing unit to the operating state.