Developing Device Speed Control for High-Saturation Printing
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Solution Overview
Problem
Conventional image forming apparatuses do not provide users with information on the increased toner supply amount, leading to shortened toner cartridge life due to high toner consumption, which is not easily detectable.
Innovation Solution
An image forming apparatus that sets a relative speed between the developing device and photosensitive drum to a higher speed for high saturation printing, with a storage unit to track the number of pages printed in this mode and a printing unit to provide information on the number of pages and toner consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the relative speed of the developing device with respect to the photosensitive drum is increased to increase toner supply amount, then the color saturation and density of recorded images are improved, but the toner consumption amount increases which shortens the life of the toner cartridge
Solution Approach 1:
The patent applies dynamics by making the developing device rotation speed adjustable rather than fixed. The control unit dynamically changes the rotation speed of the developing device based on the selected printing mode (standard mode vs. high saturation mode), allowing the system to adapt between normal toner consumption and high toner consumption scenarios while providing users with information feedback through the display unit about pages printed in high saturation mode.
2Manufacturing precision
If high saturation printing mode is used frequently, then image quality and color density are improved, but the toner cartridge life is significantly reduced, which users cannot detect without information feedback
Solution Approach 1:
The patent implements feedback by equipping the image forming apparatus with a display unit that shows information about the number of pages printed in high saturation mode. This feedback mechanism allows users to monitor their printing habits and understand the relationship between high saturation printing frequency and toner cartridge consumption, enabling them to make informed decisions about when to replace the toner cartridge.
3Quantity of substance
If the developing device rotation speed is increased to improve toner application, then the amount of toner transferred to the photosensitive drum increases, but this leads to excessive toner consumption and waste
Solution Approach 1:
The patent applies parameter changes by offering users a choice between standard mode and high saturation mode, which correspond to different developing device rotation speeds. In standard mode, the rotation speed is set to normal levels for efficient toner usage. In high saturation mode, the rotation speed is increased to improve color density, but users are made aware of the increased toner consumption through display feedback, allowing them to control and limit excessive toner usage.
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 users to monitor and limit high saturation printing to extend toner cartridge life by providing accurate toner consumption data, allowing for informed usage and replacement.
Implementation Method 1
an electrostatic latent image is formed on a photosensitive drum
Implementation Method 2
a developing device applies toner to the photosensitive drum to develop the electrostatic latent image
Implementation Method 3
the toner is transferred from the photosensitive drum to a recording material
Data Source
AI summary
An image forming apparatus that performs image formation by rotating a developing device in such a manner that a relative speed of the developing device with respect to a photosensitive drum is set to a first speed, the image forming apparatus includes a setting unit configured to set a predetermined mode in which the relative speed of the developing device with respect to the photosensitive drum is set to a second speed higher than the first speed, a storage unit configured to store, in a recording medium disposed in a toner cartridge containing the toner, information on a number of pages printed in the image formation performed in the predetermined mode, and a printing unit configured to print information on the number of pages stored in the recording medium.