Image Density Adjustment in Image Forming Apparatus
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Image density defects in image forming apparatuses are challenging to diagnose and adjust, often requiring expert intervention, as they can be caused by various factors, including toner adhesion issues and mismatched print settings, leading to inefficiencies and unnecessary service engineer involvement.
Innovation Solution
An image forming apparatus with a user input system that allows subjective evaluation of image density, performing sequential adjustments of developing bias voltage, transfer bias voltage, and toner density to match user preferences, prioritizing adjustments that are quickest to perform and most likely to resolve density issues without extensive technician expertise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If sequential adjustments of developing bias voltage, transfer bias voltage, and toner density are performed, then image density adjustment efficiency is improved, but device operation complexity increases
Solution Approach 1:
The image density adjustment process is segmented into three distinct sequential adjustments: first adjusting developing bias voltage, then transfer bias voltage, and finally toner density. This segmentation allows the system to systematically address different potential causes of density issues in a structured manner, improving adjustment efficiency while maintaining clear operational procedures for each step.
Solution Approach 2:
The system performs preliminary diagnostic evaluation by obtaining an initial image density evaluation before executing any adjustments. Based on this preliminary assessment, the system determines whether adjustments are needed and which specific adjustment to perform first, enabling targeted and efficient problem resolution rather than random trial-and-error adjustments.
2Manufacturing precision
If toner density adjustment is performed as a second adjustment, then image density can be corrected, but risk of failure increases due to incorrect settings
Solution Approach 1:
Before adjusting toner density, the system first performs preliminary adjustments of developing bias voltage and transfer bias voltage. This preliminary action sequence ensures that simpler, less invasive adjustments are attempted first, reducing the likelihood that toner density adjustment will be needed and thereby minimizing the risk of failure from incorrect toner density settings.
Solution Approach 2:
The system obtains image density evaluations after each adjustment step and uses this feedback to determine whether to proceed to the next adjustment. This feedback mechanism ensures that adjustments are made only when necessary and that the system can verify whether each adjustment is having the desired effect, improving overall reliability by avoiding unnecessary or incorrect adjustments.
3Adaptability or versatility
If user subjective evaluation is used for image density, then adaptability to user preferences is improved, but measurement precision is reduced
Solution Approach 1:
The system implements a feedback loop where users provide subjective evaluations of image density, and the system uses this feedback to automatically perform sequential adjustments. The feedback is processed through structured evaluation categories (e.g., too light, too dark, just right) that guide the adjustment process, combining subjective user preference with objective automated adjustment to achieve both adaptability and precision.
Solution Approach 2:
The system enables users to directly evaluate and control image density according to their own preferences without requiring expert intervention. Users can input their subjective evaluation, and the system autonomously performs the appropriate adjustments, making the image forming apparatus self-adjusting based on user feedback rather than requiring external expert diagnosis and adjustment.
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
Enables efficient and user-driven adjustment of image density, reducing the need for expert intervention by prioritizing quick and effective adjustments, ensuring appropriate image density is achieved while minimizing potential failures from incorrect toner density settings.
Implementation Method 1
a developing unit configured to supply a toner to an image carrier and form a toner image thereon
Implementation Method 2
a transfer unit configured to transfer the toner image on the image carrier to a recording medium and thereby form an image on the recording medium
Data Source
AI summary
An image forming apparatus includes a developing unit, a transfer unit, a power source unit configured to supply a developing bias voltage to the developing unit and a transfer bias voltage to the transfer unit, and an input device to receive an image density evaluation. A processor performs adjusts the developing bias voltage when an evaluation input indicating a defect in the image density is received. If, after the first adjustment, another evaluation input indicating a defect in image density is received, the processor adjusts one of the developing bias voltage, the transfer bias voltage, or the toner density in the developing unit.