Developer Type Matching in Image Forming Apparatus

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Solution Overview

Problem

Users face inconvenience in identifying and setting the type of developer in image forming apparatuses when developer cartridges and developing devices can be separated, leading to inappropriate image formation.

Innovation Solution

An image forming apparatus with a cartridge side identification section, a developing device side identification section, and a detecting section that compares the types of developers stored in the cartridge and used by the device, prohibiting image formation if they do not match and adjusting settings accordingly.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a cartridge side identification section and a developing device side identification section are provided to detect developer types, then image formation appropriateness is improved, but device complexity increases

Engineering Contradiction:

Improveimage formation appropriatenessVSAvoididentification section complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The identification system is segmented into two independent parts: a cartridge side identification section (including reader/writer or optical sensor) and a developing device side identification section (including memory or reflection section). This segmentation allows each part to perform a specific function, improving reliability while keeping individual components simple.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The identification sections are configured to detect developer types before image formation begins. The cartridge side identification section reads the developing device side identification section in advance, and the control section determines appropriateness before allowing operation, preventing inappropriate image formation.

Inventive Principle:

Principle #10Preliminary action

2Ease of operation

If the developer cartridge and developing device can be separated, then ease of operation is improved, but the ability to ensure correct developer type matching deteriorates

Engineering Contradiction:

Improvecartridge replacement convenienceVSAvoiddeveloper type matching accuracy

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The system provides feedback by having the cartridge side identification section read the developing device side identification section upon cartridge insertion. The control section receives this feedback, determines type matching appropriateness, and provides user feedback through display or notification, ensuring correct matching while maintaining separation convenience.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The identification system operates automatically without requiring manual user intervention. The cartridge side identification section automatically reads the developing device side identification section, and the control section automatically determines type matching, allowing users to simply replace cartridges without worrying about compatibility.

Inventive Principle:

Principle #25Self-service

3Measurement precision

If multiple identification methods (projection or radio tag) are used in the cartridge, then developer type identification is improved, but ease of operation deteriorates due to manual setting requirements

Engineering Contradiction:

Improvedeveloper type identification accuracyVSAvoidmanual setting convenience

Core Design Contradiction:

Measurement precisionVSEase of operation

Solution Approach 1:

The system performs self-identification automatically. The cartridge side identification section (reader/writer or optical sensor) automatically reads the developing device side identification section (memory or reflection section) when the cartridge is inserted, and the control section automatically determines type matching appropriateness, eliminating the need for manual user settings.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

Manual mechanical setting operations are replaced with automatic detection systems. Instead of requiring users to manually set parameters based on cartridge type, the system uses optical sensors or radio frequency identification to automatically detect and determine developer type compatibility.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Data Source

PatentUS8744283B2Image forming apparatus and image forming method

Publication Date: 2014.06.03 KK TOSHIBA

AI summary

According to one embodiment, an image forming apparatus includes an identification-section detecting device configured to detect, on the basis of an identification section included in a developer cartridge, a type of a developer stored by the developer cartridge and detect, on the basis of an identification section included in a developing device, a type of a developer used by the developing device and a control section configured to determine, on the basis of an output of the identification-section detecting device, whether the type of the developer stored by the developer cartridge and the type of the developer used by the developing device coincide with each other, prohibit from performing image formation if the types of the developers do not coincide with each other, and set an image forming method according to the determined types of the developers if the types of the developers coincide with each other.