Color Conversion Device Ink Fixation Control
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Solution Overview
Problem
Pigment ink used in image-forming devices has a lower fixing property compared to dye-based ink, leading to issues such as ink smearing and deposition on paper-conveying rollers, especially when printing on recording paper with low ink-fixing properties, and existing solutions do not adequately address these problems across various types of paper.
Innovation Solution
A color conversion device and method that adjusts achromatic and chromatic ink component values based on the type of recording medium, using a combination of first and second color converting units, adjustment value setting, and output value acquisition to minimize memory usage and ensure optimal ink fixation, thereby reducing ink smearing and deposition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a color table with low quantity settings for K ink is created based on recording paper with the lowest fixing property and used for all types of recording paper, then ink smearing and deposition on rollers is reduced, but image quality and accurate color tones cannot be achieved
Solution Approach 1:
The patent applies dynamics by making the K ink quantity adjustable based on recording paper type. Instead of using a fixed low K ink setting for all papers, the system dynamically selects appropriate K ink quantities from multiple preset values (first through fourth quantities) corresponding to different paper types (first through fourth types), allowing optimization for each specific paper type while preventing ink smearing on papers with low fixing properties
Solution Approach 2:
The patent changes the parameter of K ink quantity by presetting multiple different quantity values (first quantity < second quantity < third quantity < fourth quantity) in the color conversion table. The system selects the appropriate K ink quantity based on the recording paper type, thereby adjusting the ink fixation parameter to match the paper's absorbing characteristics and achieve both smearing prevention and high image quality
2Manufacturing precision
If color tables storing optimum black component values are created for each type of recording paper, then image quality is improved, but the number of steps for creating tables and memory usage become enormous
Solution Approach 1:
The patent segments the K ink quantity parameter into four discrete preset values (first, second, third, and fourth quantities) corresponding to four different recording paper types. This segmentation allows the system to handle multiple paper types with a manageable number of presets rather than requiring continuous adjustment or extremely fine-grained segmentation for every possible paper variation
Solution Approach 2:
The patent creates a universal color conversion table structure that can serve multiple recording paper types through the use of multiple K ink quantity presets. Rather than creating separate dedicated color tables for each paper type, a single color conversion table with multi-functional K ink quantity settings can adapt to different paper types, reducing memory usage and simplifying the system
Data Source
AI summary
A color conversion device converts an input value to an output value in order to form an image on a recording medium using an achromatic ink and a chromatic ink. The color conversion device include a first color converting unit, a second color converting unit, an adjustment value setting unit, and an output value acquiring unit. The first color converting unit converts the input value to first color data including a first chromatic component value. The second color converting unit converts the input value to second color data including a second chromatic component value and a first achromatic component value. The adjustment value setting unit sets an adjustment value based on a type of the recording medium. The output value acquiring unit acquires the output value by weighting the first color data and the second color data according to the adjustment value.