Media Reader Power Management for Reduced Access Time
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Solution Overview
Problem
Existing electronic appliances, especially portable game apparatuses and personal computers, face challenges in reducing the time required to read information from recording media while minimizing power consumption, as initial processes for stable access are time-consuming and power-intensive.
Innovation Solution
An electronic apparatus with a media reader that stores initial process results in memory when power is discontinued, allowing for immediate access upon power resumption without reperforming initial processes, and includes an exchange determination unit to skip these processes if the media has not been changed, reducing power consumption and access time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If initial processes are performed for stable access to the recording medium, then access reliability is improved, but time required to read information increases
Solution Approach 1:
The patent performs initial processes (reading recording medium information and detecting characteristics) in advance before power is discontinued. The results are stored in a memory that retains content during power discontinuation. When power is resumed, these pre-obtained results are reused, eliminating the need to repeat initial processes and thus reducing access time while maintaining reliability
Solution Approach 2:
The patent creates a copy of the initial process results (recording medium information and characteristic detection data) and stores it in a memory device. This copy can be reused when power is resumed, avoiding the need to reperform the initial processes on the actual recording medium, thereby reducing read time while preserving access reliability
2Reliability
If initial processes are performed for stable access to the recording medium, then access reliability is improved, but power consumption increases
Solution Approach 1:
The patent performs initial processes before power discontinuation and stores the results in a memory that retains data without power. When power is discontinued to save energy, the initial process results are preserved. Upon power resumption, the stored results are reused, eliminating the need to consume power again for repeating initial processes, thus reducing overall power consumption while maintaining access reliability
Solution Approach 2:
The patent creates a copy of the initial process results and stores it in a memory device that can retain data during power discontinuation. This allows the system to discontinue power to the media reader for power saving while still having access to the copied initial process results, thereby reducing power consumption without sacrificing access reliability
3Use of energy by moving object
If power supply to the media reader is discontinued for power saving, then power consumption is reduced, but time required to perform initial processes increases upon power resumption
Solution Approach 1:
The patent performs the initial processes (reading recording medium information and detecting characteristics) in advance before power is discontinued. The results are stored in a memory that retains content during power discontinuation. When power is resumed, these pre-obtained results are immediately available, eliminating the need to wait for initial processes to complete again, thus reducing the time required upon power resumption while maintaining power saving benefits
Solution Approach 2:
The patent creates a copy of the initial process results and stores it in a memory device that retains data during power discontinuation. This copy can be immediately reused when power is resumed, avoiding the time-consuming initial processes and thus reducing access time while preserving power consumption reductions
Data Source
AI summary
An electronic apparatus is provided with a media reader for accessing a removable recording medium and performs initial processes for ensuring proper access to the recording medium. A memory retains its content even when the supply of power to the media reader is discontinued. The result of the initial processes is stored in the memory when the supply of power to the media reader is discontinued. When the supply of power to the media reader is resumed, the media reader accesses the recording medium by using the result of the initial processes held in the memory.