Image Forming Apparatus Ink Ribbon Authentication and Usage Tracking
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Solution Overview
Problem
Existing image forming apparatuses lack effective mechanisms to authenticate and manage consumables, particularly ink ribbons, to prevent the use of non-genuine products and ensure proper usage limits are not exceeded.
Innovation Solution
An image forming apparatus equipped with a reader to authenticate consumables via a unique identifier and digital certificate, and a controller to verify the certificate and cumulative usage amount, prohibiting printing if the certificate is incorrect or the usage exceeds the consumable's limits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If no authentication mechanism is implemented, then the device complexity is low and ease of operation is high, but the reliability is poor due to inability to prevent non-genuine consumables and overconsumption
Solution Approach 1:
The system performs authentication and usage amount verification before allowing printing operations. The controller reads the unique identifier and digital certificate from the consumable's tag, verifies the digital certificate's validity, checks the cumulative usage amount against the total consumable amount, and only permits printing if both checks pass. This preliminary verification prevents non-genuine consumables and overconsumption before they can cause reliability issues.
Solution Approach 2:
The patent introduces a tag with integrated circuit as an intermediary component attached to the consumable item. This tag stores the unique identifier, digital certificate, and consumable amount information, serving as a mediator between the consumable and the image forming apparatus. The reader reads information from this intermediary tag, enabling reliable authentication and usage tracking without requiring complex direct verification mechanisms between the consumable and controller.
2Reliability
If digital certificate verification and cumulative usage tracking are implemented, then the reliability and security are improved, but the device complexity and operation time increase
Solution Approach 1:
The system performs all authentication checks (reading the unique identifier, verifying the digital certificate, and checking the cumulative usage amount) before the actual printing operation begins. By completing these verification steps in advance, the system ensures that once authentication is successful, the printing process can proceed without delays, thus minimizing the impact on overall operation time while maintaining high reliability.
Solution Approach 2:
The patent replaces complex mechanical or manual verification systems with electronic and cryptographic methods. The digital certificate verification uses cryptographic algorithms to authenticate the consumable's legitimacy, and the cumulative usage amount is tracked using electronic storage in the tag and processed by the controller's software, eliminating the need for manual tracking and reducing processing time compared to mechanical counting or verification mechanisms.
3Reliability
If the system tracks cumulative usage amount across multiple image forming apparatuses, then the reliability is improved, but the need for communication infrastructure increases device complexity
Solution Approach 1:
The tag with integrated circuit serves multiple functions: storing the unique identifier, containing the digital certificate for authentication, tracking the cumulative usage amount, and enabling communication with the image forming apparatus. This multi-functional intermediary component allows the system to achieve reliable cumulative usage tracking across multiple apparatuses without requiring each apparatus to have complex independent tracking systems, as the tag itself maintains and updates the usage information.
Data Source
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AI summary
An image forming apparatus includes a reader and a controller. The reader reads, from a tag of an ink ribbon, a unique identifier, a digital certificate, and ribbon length information indicating a length of a ribbon. The controller verifies the digital certificate based on the unique identifier. The controller determines a cumulative ink ribbon usage amount of the ink ribbon corresponding to the unique identifier. The controller prohibits printing in response a determination that at least one of (a) the digital certificate is verified to be incorrect or (b) the cumulative ribbon usage amount is equal to or greater than the ribbon length information.