Impedance Branch for Contact Reliability Detection in Printer Chips
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Solution Overview
Problem
Existing image forming apparatus technologies lack reliable detection methods to determine if the contact between the chip in a replaceable unit and the image forming apparatus is stable, leading to potential data transmission errors and incorrect identification of installation issues.
Innovation Solution
Incorporating an impedance branch in the chip to detect the reliability of contact between the chip and the image forming apparatus, allowing for accurate assessment of contact stability and distinguishing between chip-related errors and installation-related errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a chip is added to the replaceable unit to detect installation status, then the ability to identify installation issues is improved, but the device complexity increases
Solution Approach 1:
The patent changes the detection parameter from complex multi-point contact verification to simple impedance measurement. By measuring the impedance value of the contact interface, the system can determine installation status with a single parameter, reducing chip complexity while maintaining detection accuracy.
Solution Approach 2:
The patent replaces mechanical contact verification methods with electrical impedance measurement. Instead of mechanically checking contact points, the system uses electrical properties (impedance) to detect installation status, simplifying the chip design while improving reliability.
2Ease of operation
If elastic contact is used between chip and contact terminal, then the ease of installation is improved, but the measurement precision of contact reliability deteriorates
Solution Approach 1:
The patent introduces feedback through impedance measurement to verify contact reliability. The system measures the impedance value and compares it against expected ranges, providing feedback on whether the elastic contact is sufficient for reliable data transmission, thus enabling precise detection despite the mechanical compliance of elastic contacts.
Solution Approach 2:
The patent uses impedance as a sensitive parameter to detect contact quality. By monitoring impedance changes, the system can precisely determine whether elastic contacts are making reliable connection, converting the difficult-to-measure mechanical contact stability into an easily measurable electrical parameter.
3Device complexity
If no contact reliability detection is implemented, then the device complexity is reduced, but data transmission errors increase
Solution Approach 1:
The patent performs contact reliability detection before data transmission begins. By measuring impedance during the installation phase, the system identifies poor contacts in advance and prevents data transmission errors, ensuring reliability without requiring complex error correction mechanisms during operation.
Data Source
AI summary
A chip used for a replaceable unit of an image forming apparatus includes a storage unit configured to store related parameters of the replaceable unit, a plurality of electrical contacts, and an impedance branch. The image forming apparatus is provided with an electrical contact terminal. An electrical contact is capable of electrically connecting to the electrical contact terminal. One end of the impedance branch is connected to at least one of the plurality of electrical contacts for achieving a detection of contact reliability between the at least one of the plurality of electrical contacts connected to the impedance branch and the electrical contact terminal of the image forming apparatus.