Image Erasing Apparatus User Authentication Control
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Solution Overview
Problem
Shared image erasing apparatuses risk mistakenly erasing images from sheets belonging to other users due to mixed usage, and lack user authentication to control access.
Innovation Solution
An image erasing apparatus with a readout unit to identify user authentication information printed on sheets, an erasing unit to remove images, and a control unit to ensure that only authorized users can erase their own images by matching the readout information with user authentication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the image erasing apparatus is shared by many users without authentication, then the ease of operation is improved, but the reliability deteriorates due to mistaken erasure of other users' images
Solution Approach 1:
The system performs preliminary authentication of the user before allowing the erasing operation to proceed. The control unit reads authentication information from the sheet and compares it with the authenticated user's information, ensuring that only authorized users can erase images. This preliminary check prevents mistaken erasure while maintaining ease of use for legitimate users.
2Reliability
If user authentication information is added to the system, then the reliability is improved by preventing mistaken erasure, but the device complexity increases
Solution Approach 1:
The patent introduces an intermediary authentication information element that is printed on the sheet along with the image. This intermediary carrier contains the user identification data and serves as a mediator between the sheet and the authentication system. The control unit reads this intermediary information to verify user identity, adding authentication capability without significantly complicating the overall device structure.
3Reliability
If authentication information is printed on the sheet, then the reliability is improved through user identification, but the loss of information increases due to the additional data requirement
Solution Approach 1:
The authentication information is merged with the image data on the sheet, both being printed using the same printing mechanism. This combination allows the system to retrieve and verify user authentication data without requiring separate physical tags or additional processing steps, thereby improving reliability while minimizing the increase in information handling complexity.
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
Prevents unintended image erasure and restricts access to authorized users, ensuring that only intended images are erased.
Implementation Method 1
a readout unit (106) which reads out authentication information of a user who prints an image, the authentication information of the user being contained in the image printed on the sheet
Implementation Method 2
The erasable color agent is decolored by, for example, heating. Accordingly, the image erasing apparatus includes an erasing unit which heats the image on the sheet
Implementation Method 3
The erasable color agent is decolored by, for example, heating
Data Source
AI summary
Provided are an image erasing apparatus which erases an image printed on a sheet and an image forming apparatus having an image erasing function. The image erasing apparatus and the image forming apparatus each include a readout unit, an erasing unit, and a control unit. The control unit acquires authentication information of a user who uses the apparatuses and allows the erasing unit to erase the image when determining that the acquired authentication information coincides with authentication information read out by the readout unit.