Power Supply Controlling Circuit for Dual USB Scanner Stability
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Solution Overview
Problem
Current scanner units face challenges in stabilizing power supply when receiving power from a computer via a single USB cable, limiting peak current and resulting in insufficient power delivery, and struggle to maintain optimal reading and processing speeds while minimizing power consumption.
Innovation Solution
A power supply controlling circuit that allows power reception from two USB ports of an information processing apparatus, enabling stable power supply and adaptive power management between AC power sources and USB ports, with a first power unit maintaining constant operation and a second power unit varying according to power source changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If power is supplied from a single USB cable from the computer, then the connection is simple and portable, but the peak current is limited and sufficient power cannot be fed stably
Solution Approach 1:
The patent combines power from two USB ports into a single power supply system. The power supply controlling circuit receives power signals from both USB ports and merges them to provide stable power to the scanner unit, resolving the contradiction between simple connection and stable power supply.
Solution Approach 2:
The power supply controlling circuit is designed to universally accept power from multiple sources (two USB ports) and automatically manage the power distribution. This multi-functional power reception capability allows the system to maintain simplicity while achieving stable power supply through dual-port utilization.
2Use of energy by moving object
If power consumption of the scanner unit is reduced, then portability is improved, but reading speed and data transfer speed are reduced
Solution Approach 1:
The patent implements dynamic power management where the power supply controlling circuit dynamically adjusts power distribution based on operational requirements. When AC power is available, the system operates at full power for optimal reading speed. When USB power is used, the system adaptively manages power consumption to maintain acceptable performance, resolving the contradiction between power consumption reduction and speed maintenance.
Solution Approach 2:
The system changes operational parameters based on power source availability. The power supply controlling circuit monitors the power source type and adjusts operating parameters such as reading speed, data transfer rate, and component power levels to optimize performance for each power scenario, thereby maintaining productivity while adapting power consumption levels.
3Use of energy by moving object
If the scanner unit operates in power saving mode, then power consumption is reduced, but the reading operation performance deteriorates
Solution Approach 1:
The power supply controlling circuit incorporates feedback mechanisms to monitor power source availability and operational performance. Based on this feedback, the system intelligently switches between power saving mode and normal operation mode, ensuring that reading performance requirements are met when AC power is available while reducing consumption when USB power is used, thus resolving the contradiction between power consumption and performance reliability.
Data Source
AI summary
A power supply controlling circuit includes: power supplied portions, adapted to receive power supply from at least one external apparatus; a first power unit, adapted to be driven by a first power; and a second power unit, adapted to be driven by a second power. In response to a change of the power supply, the second power is varied, while the first power is maintained.