Rotatable Image Scanner Power Management via Posture Detection
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Solution Overview
Problem
Existing image reading apparatuses fail to effectively reduce power consumption when changing postures, particularly when switching between usage and non-usage states, without requiring dedicated user operations.
Innovation Solution
The image reading apparatus includes a controller that manages power supply modes by switching between powering and disabling specific detection units based on posture changes, allowing for reduced power consumption without user intervention, using a first power supply mode for document reading, a second mode with minimal power for non-usage states, and a third mode with even lower power consumption when idle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the apparatus main body changes posture to reduce projection area, then the device size is suppressed, but power consumption increases due to continuous operation of detection units
Solution Approach 1:
The patent applies dynamics by making the power supply state dynamic rather than static. The controller dynamically adjusts the power supply to detection units based on the detected posture of the apparatus main body. When the apparatus is in a first posture (not in use), the controller supplies power only to the posture change detection unit. When in a second posture (reading document), power is supplied to all detection units. This dynamic power management resolves the contradiction by adapting energy consumption to the actual operational needs of each posture.
Solution Approach 2:
The patent changes the power supply parameter based on posture detection results. The controller monitors the posture state and adjusts the power supply level accordingly - reducing power to only essential detection units in the first posture, and providing full power to all detection units in the second posture. This parameter change approach allows the system to optimize between compact design and energy consumption by adapting power levels to functional requirements.
2Measurement precision
If power is supplied to all detection units continuously, then detection accuracy is maintained, but power consumption increases
Solution Approach 1:
The patent applies local quality by providing different power supply levels to different detection units based on their current necessity. In the first posture, only the posture change detection unit receives power, while other detection units are powered down. In the second posture, all detection units receive power. This localized power management ensures that detection accuracy is maintained only for the units currently needed, rather than continuously powering all units, thus resolving the contradiction between measurement precision and energy consumption.
Solution Approach 2:
The system implements periodic action by continuously monitoring posture changes and dynamically switching power supply states. The controller periodically checks the posture detection unit's output and adjusts power supply accordingly. This periodic monitoring and adjustment ensures that power is supplied to detection units only when needed for accurate detection, rather than maintaining continuous power supply, thereby balancing detection accuracy with energy savings.
3Volume of moving object
If the apparatus remains in a compact posture, then space efficiency is improved, but usability decreases when document reading is required
Solution Approach 1:
The patent makes the apparatus posture dynamic rather than fixed. The apparatus main body can automatically switch between the first posture (compact, not in use) and the second posture (reading document) based on detection results. This dynamic posture adjustment allows the system to optimize for space efficiency during idle periods while automatically becoming usable when needed, resolving the contradiction between compact storage and operational accessibility.
Solution Approach 2:
The apparatus performs self-service by automatically detecting its own posture state and autonomously switching between postures without requiring user intervention. The posture change detection unit monitors the apparatus state, and the controller automatically adjusts the posture based on whether the apparatus is in use or not. This self-service capability allows the apparatus to maintain compactness while ensuring usability is restored automatically when document reading is required.
Data Source
AI summary
An image reading apparatus includes a first posture detection unit that detects a first posture that is a posture of the apparatus main body when not in use, a second posture detection unit that detects a second posture that is a posture of the apparatus main body when in use, and a posture change detection unit that detects a change in a posture of the apparatus main body. When the first posture detection unit detects a switchover of the apparatus main body to the first posture in a first power supply mode in which power is supplied to the first posture detection unit, the second posture detection unit, and the posture change detection unit, the first power supply mode transitions to the second power supply mode in which a controller supplies power to only the posture change detection unit.