CRUM Color Conversion Table Selection for Print Quality
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Solution Overview
Problem
Conventional image forming devices using a single color conversion table often result in deteriorated print quality, especially for color images, as they do not consider the device's specification and usage information, making it difficult to achieve optimum print quality.
Innovation Solution
An image forming device that reads a target color conversion table from a customer replaceable unit memory (CRUM) based on current status information, including specification and usage information, to apply the appropriate color conversion table for optimal print quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single color conversion table is used in a color image forming device, then the device complexity is reduced, but the print quality deteriorates because it cannot adapt to different device statuses and usage conditions
Solution Approach 1:
The patent segments the single color conversion table into multiple color conversion tables, each optimized for specific device statuses (e.g., new device, used device, different recording material types). The CRUM stores multiple color conversion tables that are selected based on current device conditions, allowing the system to maintain high print quality without excessive complexity by only loading the necessary table.
Solution Approach 2:
The patent implements dynamic selection of color conversion tables based on real-time device status information stored in the CRUM. The system automatically switches between different color conversion tables according to factors such as device usage history, recording material type, and environmental conditions, making the color conversion process adaptive rather than static.
2Manufacturing precision
If multiple color conversion tables are stored in the CRUM based on device status, then the print quality is improved, but the memory requirements and device complexity increase
Solution Approach 1:
The CRUM is segmented to store multiple color conversion tables organized by device status categories. Rather than storing all possible tables indiscriminately, the system segments them into groups based on device age, recording material type, and other status factors, allowing efficient storage and retrieval of only the relevant tables needed for current operating conditions.
Solution Approach 2:
The patent changes the parameter of color conversion table selection based on device status parameters stored in the CRUM. The system monitors parameters such as device usage count, recording material type, and environmental conditions, then selects the appropriate color conversion table that matches the current parameter set, optimizing print quality for each specific operating scenario.
3Manufacturing precision
If color conversion tables are selected based on detailed status information, then the print quality is optimized, but the measurement and detection requirements increase
Solution Approach 1:
The CRUM automatically stores and manages device status information without requiring external intervention. The system self-monitors parameters such as device usage history, recording material type, and operational conditions, and automatically updates the CRUM with this information. This self-service approach simplifies the detection process by making status information readily available in a structured format that the color conversion table selection logic can directly utilize.
Data Source
AI summary
An image forming device and a controlling method thereof, in which the image forming device includes: a customer replaceable unit memory (CRUM) associated with a recording material storage medium to store a color conversion table group including a color conversion table that corresponds to status information of the image forming device, and a controller to determine current status information of the image forming device, to read a target color conversion table from among the color conversion table group according to the determined current status information, and to apply the target color conversion table to perform a printing operation on a document. Therefore, an optimum print quality can be guaranteed according to the determined current status of the image forming device.