Image Formation Adjustment Segmented for Monochrome and Color Printing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing electrophotographic image forming apparatuses face challenges in efficiently and effectively adjusting image formation conditions for both monochrome and color printing, leading to potential instability in image quality and efficiency due to infrequent or frequent condition adjustment processes.
Innovation Solution
The image forming apparatus includes separate processing units for monochrome and color printing, with predefined adjustment conditions, executing specific types of condition adjustment processes based on the printing history, ensuring efficient and stable image quality by adjusting conditions like developing bias voltage and laser light amount only when necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If condition adjustment processes are executed frequently for both monochrome and color printing, then image quality stability is improved, but printing efficiency and productivity deteriorate due to excessive adjustment interruptions
Solution Approach 1:
The patent segments the condition adjustment process into two independent pathways: one for monochrome printing and another for color printing. Each pathway has its own execution conditions and frequency control, allowing optimized adjustment intervals for each printing type without compromising overall image quality stability or productivity
Solution Approach 2:
The patent implements dynamic adjustment frequency control where the condition adjustment processes are executed based on real-time printing history and type-specific conditions. The adjustment frequency adapts dynamically to the actual printing workload and type, preventing both excessive adjustments that reduce productivity and insufficient adjustments that compromise image quality
2Productivity
If condition adjustment processes are executed infrequently to maintain printing efficiency, then productivity is improved, but image quality stability deteriorates
Solution Approach 1:
By dividing the adjustment strategy into separate monochrome and color pathways, the system can apply different execution frequencies appropriate to each printing type's characteristics, ensuring adequate adjustment frequency for maintaining image quality while minimizing overall interruption to printing operations
Solution Approach 2:
The patent changes the execution parameters of condition adjustment processes based on printing history and type. By monitoring the number of printed sheets and printing type, the system adjusts when and how often condition adjustments occur, optimizing the balance between maintaining image quality and preserving printing efficiency
3Device complexity
If a unified condition adjustment process is used for both monochrome and color printing, then device complexity is reduced, but image quality stability deteriorates due to inability to optimize for each printing type
Solution Approach 1:
The patent introduces segmentation into the control logic by creating distinct adjustment pathways for monochrome and color printing. Each pathway evaluates its own execution conditions and performs adjustments independently, enabling type-optimized image quality control while maintaining relatively simple individual process flows that together provide comprehensive coverage
4Ease of operation
If condition adjustment processes are executed without considering printing history, then ease of operation is improved, but image quality stability worsens due to lack of adaptive optimization
Solution Approach 1:
The system implements self-service through automatic monitoring of printing history and autonomous decision-making about when condition adjustments should occur. The control unit automatically tracks the number of printed sheets and printing types, and independently determines the optimal timing for condition adjustments without requiring manual intervention or complex user configuration
Solution Approach 2:
The patent incorporates feedback mechanisms where the execution of condition adjustment processes is based on feedback from printing history data. The system continuously monitors printing activity and uses this feedback to adaptively control the timing and frequency of condition adjustments, ensuring image quality stability while maintaining operational simplicity
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 approach stabilizes image quality and maintains efficiency by optimizing condition adjustment processes for monochrome and color printing, balancing the need for frequent adjustments without compromising printing speed.
Implementation Method 1
electrophotographic image forming units corresponding to yellow, cyan, magenta, and black
Implementation Method 2
transfer the images to a sheet
Data Source
Figure 1
Figure 2
Figure 3
AI summary
An image forming apparatus (100) includes an image forming portion (3), a first image processing portion (52), and a second image processing portion (53). The first image processing portion (52) executes a plurality of types of condition adjustment processes of adjusting an image formation condition of the image forming portion (3) on the image forming unit of the plurality of image forming units (20) used for monochrome printing in units of a specific number of condition adjustment processes in order whenever an execution history of the monochrome printing satisfies a monochrome adjustment condition set in advance. The plurality of types of condition adjustment processes is set in advance. The second image processing (53) portion executes the plurality of types of condition adjustment processes on the image forming unit of the plurality of image forming units (20) used for color printing in units of a specific number of condition adjustment processes in order whenever an execution history of the color printing satisfies a color adjustment condition set in advance.