Photosensitive Drum Phase Matching for Color Registration
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Solution Overview
Problem
Existing image-forming apparatuses face issues with color mismatch due to differing rotation phases of photosensitive parts, leading to reduced image quality, and performing phase match before jobs increases output time, affecting user experience.
Innovation Solution
An image-forming apparatus with motors, phase sensors, and a control unit that performs phase match on photosensitive parts after at least one page of a job is completed, using phase sensors to detect and synchronize the rotation phases of the parts based on a phase match instruction, ensuring the phase difference is within a threshold without increasing output time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If phase match is performed before image-forming jobs, then color mismatch is prevented, but output time of the first page is increased
Solution Approach 1:
The patent applies preliminary action by performing phase match during the warm-up rotation phase before image formation begins. The control unit rotates the photosensitive part at a predetermined speed, detects the phase using a phase sensor, and adjusts the rotation phase to match the reference phase before the first page output. This ensures color accuracy is established in advance without affecting subsequent page performance.
Solution Approach 2:
The patent implements dynamics by making the phase match process adaptive and conditional. The control unit dynamically adjusts the rotation phase based on detected phase differences, and the system can perform phase match selectively based on operational conditions. This dynamic adjustment mechanism ensures color accuracy while minimizing impact on output time through intelligent control.
2Manufacturing precision
If phase match is performed before image-forming jobs, then rotation phase synchronization is achieved, but user experience is degraded
Solution Approach 1:
The patent performs phase match during the warm-up rotation phase, which occurs before the user expects the first page output. By completing phase synchronization in advance during this preparatory period, the system ensures high rotation phase accuracy without making the user wait longer for their document, thus maintaining good user experience.
Solution Approach 2:
The patent rushes through the phase match process during the warm-up rotation by using automated phase detection and adjustment mechanisms. The control unit quickly detects phase differences and makes necessary adjustments during the brief warm-up period, completing the synchronization task efficiently without extending the overall operational timeline that the user experiences.
3Productivity
If rotation phases of photosensitive parts are not synchronized, then image formation can proceed quickly, but color mismatch occurs reducing image quality
Solution Approach 1:
The patent performs phase synchronization as a preliminary action during warm-up rotation before image formation begins. The control unit detects the rotation phase using a phase sensor and adjusts the photosensitive part's rotation phase to match the reference phase in advance. This ensures that when image formation starts, the parts are already synchronized, preventing color mismatch while maintaining high image formation speed throughout the job.
Solution Approach 2:
The patent implements feedback by using a phase sensor to continuously detect the rotation phase of the photosensitive part and comparing it with the reference phase. The control unit receives this feedback and automatically adjusts the rotation phase to eliminate discrepancies. This closed-loop feedback mechanism ensures precise phase synchronization is achieved and maintained, guaranteeing color accuracy without compromising image formation speed.
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
The solution effectively prevents color mismatch by synchronizing photosensitive parts after initial job completion, maintaining image quality without prolonging the output time of the first page or subsequent pages.
Implementation Method 1
a phase sensor configured to detect a rotation phase of the photosensitive part
Data Source
AI summary
The present disclosure provides an image-forming apparatus and a phase match method of photosensitive parts. The image-forming apparatus includes a first motor, configured to rotate a first photosensitive part; a second motor, configured to rotate a second photosensitive part; a first phase sensor, configured to detect a first rotation phase of the first photosensitive part; a second phase sensor, configured to detect a second rotation phase of the second photosensitive part; and a control unit, configured to, after at least one page of image-forming job is received and at least one of the first motor and the second motor receives a phase match instruction, perform phase match on the first photosensitive part and the second photosensitive part according to a rotation phase of a photosensitive part corresponding to a motor receiving the phase match instruction.