Optical Communication for Replaceable Image Forming Units
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Solution Overview
Problem
Existing image forming devices face challenges in efficiently communicating information about replaceable units, such as toner cartridges, beyond the use of smart chips and memory devices, which are limited in alternative communication means.
Innovation Solution
Incorporating transmissive or reflective members on the exterior of replaceable units that modify optical energy, allowing an optical sensor to detect characteristics like toner type, color, and capacity by changing the amount of optical energy received, enabling the image forming device to identify and authenticate the units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If smart chips and memory devices are used for communication between replaceable units and image forming devices, then information storage and communication reliability are improved, but device cost and complexity increase
Solution Approach 1:
The patent replaces electronic communication systems (smart chips and memory devices) with an optical communication system using transmissive members and optical sensors. This substitution eliminates the need for complex electronic components while maintaining reliable information transmission through optical properties such as transmissivity and reflectivity variations.
Solution Approach 2:
The patent employs inexpensive transmissive members (such as colored filters or opaque elements) on replaceable units that can be easily manufactured and replaced. These simple optical components provide cost-effective communication compared to expensive smart chips, while their disposability aligns with the replaceable nature of the units.
2Loss of information
If smart chips and memory devices are mounted on replaceable units, then information storage capability is improved, but manufacturing cost increases
Solution Approach 1:
The patent replaces expensive smart chips with inexpensive transmissive members that can be integrated into replaceable units during standard manufacturing processes. These optical elements (colored filters, opaque coatings) are significantly cheaper than electronic memory devices while providing sufficient information storage for identifying unit characteristics.
Solution Approach 2:
The patent utilizes color and optical property variations of transmissive members to encode information about replaceable unit characteristics. Different colors or transmissivity levels represent different information states, eliminating the need for complex electronic storage while maintaining information capability through simple, manufacturable optical materials.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method provides a reliable and cost-effective means to communicate unit characteristics, enhancing authentication and reducing reliance on expensive smart chips, while ensuring proper operation and preventing unauthorized units from being used.
Implementation Method 1
The at least one transmissive member is arranged to receive optical energy from the image forming apparatus and has a transmissivity for modifying an amount of the optical energy that leaves the at least one transmissive member relative to an amount of the optical energy received by the at least one transmissive member
Implementation Method 2
A system for determining at least one characteristic of a replaceable unit installable in an image forming device includes an optical sensor including a transmitter that emits optical energy along an optical path and a receiver positioned to receive the optical energy
Data Source
AI summary
A replaceable unit for an image forming apparatus according to one example embodiment includes a housing and at least one transmissive member positioned on an exterior of the housing. The at least one transmissive member is arranged to receive optical energy from the image forming apparatus and has a transmissivity for modifying an amount of the optical energy that leaves the at least one transmissive member relative to an amount of the optical energy received by the at least one transmissive member. The at least one transmissive member indicates information relating to a characteristic of the replaceable unit.