Printer Cartridge Memory System for Authorized Use Control
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Solution Overview
Problem
There is a need to control and limit the use of printing material cartridges in printers to ensure that only authorized cartridges are used, particularly in contractual agreements where specific cartridges are required for printing services.
Innovation Solution
The implementation of a memory system in printing material cartridges that uses write once read only memory (WORM) and rewriteable memory to store and manage printer identifiers, allowing the cartridge to function only in specific or authorized printers by writing a printer identifier to the cartridge memory during initial installation, ensuring compatibility and authorization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a printing material cartridge is designed to be universally compatible with multiple printers, then ease of operation is improved, but control and authorization capability deteriorates
Solution Approach 1:
The patent applies preliminary action by pre-programming the cartridge memory with a prompt at a first memory address before the cartridge is used. This prompt instructs the printer to write a printer identifier to a second memory address during initial installation. This advance preparation enables later authorization control without requiring complex real-time processing, resolving the contradiction between ease of operation and authorization capability.
2Adaptability or versatility
If cartridge memory is made rewriteable to store printer identifiers, then adaptability is improved, but reliability deteriorates due to potential alteration of data
Solution Approach 1:
The patent segments the cartridge memory into distinct functional areas: a first memory address storing the prompt (write once, read many) and a second memory address for the printer identifier (rewriteable). This segmentation allows different portions of the memory to have different access characteristics, enabling the printer identifier to be rewritten for adaptability while the prompt remains protected for reliability, thus resolving the contradiction between adaptability and data integrity.
3Adaptability or versatility
If the printer writes a printer identifier to the cartridge memory, then authorization control is improved, but device complexity increases due to additional memory operations
Solution Approach 1:
The patent applies self-service by designing the cartridge memory with a built-in prompt that automatically instructs the printer what to do. When the printer reads the prompt from the first memory address, it self-directs to write the printer identifier to the second memory address without requiring complex external control logic. This reduces the complexity of authorization control while maintaining adaptability, as the cartridge essentially guides the printer through the process.
Data Source
AI summary
In one example, a printing material cartridge includes a container to contain a printing material and a memory to enable an exchange of information between the cartridge and a printer controller when the cartridge is installed in the printer. The memory includes a first write once then read only memory with a first memory address, a second write once then read only memory with a second memory address, the first memory address having information to prompt the printer controller to write a printer identifier to the second memory address, and a memory controller to control data storage and retrieval to and from the write once then read only memories and to control the exchange of information with the printer controller.