I2C Logic Package for Replaceable Print Component Communication
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Solution Overview
Problem
Existing printing systems face challenges in efficiently communicating and managing data between replaceable print apparatus components and the print apparatus, particularly in terms of identity, capabilities, status, and resource management, due to limitations in communication protocols and resource constraints of replaceable components.
Innovation Solution
The implementation of a logic circuitry package that utilizes the I2C protocol to enable communication between master and slave ICs, allowing for data exchange, sensor monitoring, and command execution through a bus interface, with features like multiple addresses for different functions and secure microcontroller functions, facilitating efficient data processing and resource management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple communication protocols are used for data exchange between print components and print apparatus, then communication versatility is improved, but device complexity increases
Solution Approach 1:
The patent segments the communication system into a master controller in the print apparatus and slave controllers in replaceable components, with each slave having a unique address. This segmentation allows multiple components to communicate through a standardized I2C bus protocol without requiring complex protocol switching, resolving the contradiction by organizing complexity hierarchically rather than horizontally across protocols.
Solution Approach 2:
The patent implements a universal I2C communication interface that can address multiple slave devices with different functions (ink level sensing, cartridge identification, printhead control) through a single standardized protocol. This universal interface eliminates the need for multiple specialized communication protocols while maintaining versatility through address-based device selection.
2Adaptability or versatility
If replaceable print components include integrated logic circuitry for monitoring and communication, then functionality is improved, but manufacturing complexity increases
Solution Approach 1:
The patent merges the logic circuitry for communication and monitoring functions directly into the replaceable print components (cartridges, printheads), combining what could be separate entities into integrated units. This integration improves functionality by enabling autonomous monitoring and communication while simplifying manufacturing by reducing the number of discrete components that need to be assembled.
Solution Approach 2:
The replaceable components are equipped with self-contained logic circuitry that autonomously performs monitoring functions (ink level detection, component status sensing) and communicates with the master controller without requiring external processing. This self-service capability enhances functionality while keeping manufacturing relatively simple by using standardized integrated circuits.
3Ease of operation
If a standardized communication interface is implemented across all print components, then ease of operation is improved, but adaptability to different component types decreases
Solution Approach 1:
The patent implements a feedback mechanism where slave controllers in replaceable components automatically report their identity, capabilities, and status to the master controller through the I2C interface. The master controller uses this feedback information to dynamically adapt its operations to the specific component type installed, thereby maintaining ease of operation through standardized interfacing while preserving adaptability to different component variations.
Data Source
AI summary
A logic circuitry package for a replaceable print apparatus component includes an I2C interface to communicate with a print apparatus logic circuit and at least one logic circuit. The at least one logic circuit is configured to respond to communications over the I2C interface that are directed to an initial or reconfigured I2C address. The at least one logic circuit is configured to receive, via the I2C interface, a write command to a first memory address of the logic circuit to initiate a first function of the logic circuit. The at least one logic circuit is configured to generate first data in response to the first function. The at least one logic circuit is configured to receive, via the I2C interface, a first read command to a second memory address of the logic circuit. The at least one logic circuit is configured to transmit, via the I2C interface, the first data in response to the first read command to the second memory address.