Image Forming Apparatus Toner Mode Switching
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Solution Overview
Problem
In image forming apparatuses, unnecessary consumption of color toners occurs during startup when both color and monochrome modes are corrected before determining the actual printing job, leading to inefficient use of resources and increased time before starting a monochrome printing job.
Innovation Solution
An image forming apparatus with a first mode using multiple colors and a second mode using only black toner, featuring a cumulative page counter and determiner to switch to the black toner mode when a threshold of pages printed with multiple colors is exceeded, thereby optimizing toner usage based on the printing mode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If color matching correction and tone correction are executed in both color mode and monochrome mode during startup, then correction accuracy is improved, but color toner consumption increases unnecessarily
Solution Approach 1:
The system dynamically switches between color mode and monochrome mode based on the detected printing job type. The control unit determines whether to execute color matching correction and tone correction for color toners or only for black toner, adapting the correction process to the actual printing requirements rather than always using color mode
Solution Approach 2:
The system changes the operational parameters of the correction process by switching between two distinct modes: color mode (with color matching correction and color tone correction) and monochrome mode (with only black tone correction). This parameter switching eliminates unnecessary color toner consumption while maintaining correction accuracy for the actual printing job
2Reliability
If color matching correction is executed before determining the printing job mode, then correction completeness is improved, but startup time increases
Solution Approach 1:
The system dynamically adjusts the correction process based on the printing job mode detected after startup. Instead of always executing the complete color correction process, the system adapts the correction scope to match the actual printing requirements, reducing unnecessary processing time while maintaining correction completeness for the relevant toners
Solution Approach 2:
The system performs preliminary detection of the printing job mode (color or monochrome) before executing the appropriate correction process. This allows the system to prepare and execute only the necessary corrections for the detected job type, avoiding the time penalty of executing unnecessary color corrections in monochrome jobs
3Manufacturing precision
If tone correction is executed for all toners in monochrome mode, then image quality is improved, but toner consumption increases
Solution Approach 1:
The system changes the toner correction parameters by switching to monochrome mode when a monochrome printing job is detected. In this mode, tone correction is executed only for black toner rather than all toners, maintaining image quality for black-and-white printing while eliminating unnecessary color toner consumption
Data Source
AI summary
An image forming apparatus for which a first mode using toners of plural colors including a black toner and a second mode using only the black toner can be set, includes a first printing cumulatively counting part that cumulatively counts a first number of pages for which image forming has been executed by using the toners of plural colors; a first printing determining part that determines whether the first number of pages counted by the first printing cumulatively counting part has exceeded a threshold; and a correction control part that controls not to execute a correcting process for image forming that uses the toners of plural colors but to execute a correcting process for image forming that uses only the black toner, when the second mode has been set in a case where the first printing determining part has determined that the first number of pages has exceeded the threshold.