Toner Cartridge Genuineness Verification Without Memory
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Solution Overview
Problem
Existing image-forming apparatuses, such as laser printers, incur unnecessary costs by requiring a memory device in supplied toner cartridges, leading to erroneous genuineness verification if no memory device is present.
Innovation Solution
An image-forming apparatus with a counter, cartridge detector, and reader that exercises different control types based on the presence or absence of a toner cartridge and memory device, allowing verification of genuine cartridges without a memory device, such as supplied toner cartridges, by counting image formation values or toner consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a memory device is always installed in supplied toner cartridges, then genuineness verification accuracy is improved, but manufacturing cost increases
Solution Approach 1:
The invention changes the verification parameter from solely relying on memory device presence to using a combination of counter value and memory device status. The controller verifies genuineness by checking both the counter value (which increases with each image formation) and the memory device presence, allowing supplied cartridges without memory devices to be correctly identified as genuine based on their counter values.
2Reliability
If a memory device is required for genuineness verification, then verification reliability is improved, but device complexity increases
Solution Approach 1:
The invention extracts the memory device from being a mandatory component and makes it optional. The system is designed to handle two cases: cartridges with memory devices and cartridges without memory devices. The counter value serves as an alternative verification parameter when the memory device is absent, thereby reducing the requirement for universal memory device installation.
Solution Approach 2:
The verification system is designed to be universal by accommodating both types of cartridges (with and without memory devices). The controller performs multi-functional verification: it can verify genuineness using memory device data when present, or using counter value when memory device is absent, or using both together for enhanced verification.
3Measurement precision
If counter value verification is added to genuineness checking, then verification accuracy is improved, but control complexity increases
Solution Approach 1:
The counter value is preliminarily accumulated during each image formation operation, incrementing by a predetermined amount. This preliminary action prepares the verification data in advance, so that during genuineness verification, the controller only needs to read and compare the pre-accumulated counter value against expected ranges, rather than calculating or measuring it during the verification process itself.
Data Source
AI summary
In an image-forming apparatus for forming an image using toner contained in a toner cartridge, genuineness of the toner cartridge with or without a memory device is verified. A counter counts a value concerning image formation. A cartridge detector determines the presence or absence of the toner cartridge. A reader is configured to retrieve data from a memory device if any provided in the toner cartridge. A controller is configured to exercise two types of control. If the cartridge detector determines that the toner cartridge is present, the value counted by the counter is greater than a predetermined value, and the reader has failed retrieval of predetermined data, then a first type of control conformable to a toner cartridge other than a genuine toner cartridge is exercised. Otherwise, a second type of control conformable to the genuine toner cartridge is exercised.