Image Forming Apparatus Toner Consumption Reduction
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Solution Overview
Problem
Image forming apparatuses face issues with excessive consumption of developing material due to phenomena like the 'edge effect' and 'sweeping', which are influenced by environmental conditions and the lifespan of components, leading to inefficient toner usage and image quality degradation.
Innovation Solution
The apparatus corrects pixel values in image data by specifying and adjusting exposure conditions for specific pixels, dividing them into sub-pixels, and thinning out certain sub-pixels to reduce excessive toner consumption, using a CPU and lookup table to determine correction parameters based on detected environmental and operational parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If exposure intensity is reduced for image regions to decrease toner consumption, then toner consumption is reduced, but image density and quality deteriorate
Solution Approach 1:
The pixel is divided into multiple sub-pixels, allowing selective exposure of only necessary sub-pixel regions. This segmentation enables precise control of toner deposition areas, reducing overall toner consumption while maintaining image density in critical regions.
Solution Approach 2:
Different exposure strategies are applied to different regions within a pixel based on local image characteristics. By identifying and correcting specific pixels showing excessive developing material, the system maintains high image quality where needed while reducing toner usage in less critical areas.
2Quantity of substance
If developing material amount is increased to improve image coverage, then image coverage is improved, but edge effect and sweeping increase
Solution Approach 1:
The system performs preliminary correction by identifying pixels prone to edge effect and sweeping before development occurs. By adjusting exposure conditions for these specific pixels in advance, the system prevents excessive developing material accumulation at edges and following ends, thereby eliminating harmful effects before they manifest.
Solution Approach 2:
The system uses detected information about actual developing material distribution to identify pixels with excessive material. This feedback mechanism allows continuous optimization of exposure conditions, adjusting development parameters based on observed patterns of edge effect and sweeping to minimize these harmful phenomena.
3Loss of substance
If pixel correction is performed by dividing into sub-pixels and thinning, then toner consumption is reduced, but device complexity increases
Solution Approach 1:
The system performs pixel correction calculations and sub-pixel division in advance before the actual development process. By pre-processing the image data and determining which sub-pixels to expose, the system reduces real-time processing complexity during development while achieving toner savings.
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 effectively reduces toner consumption by minimizing edge effects and sweeping, resulting in improved image quality and more efficient use of developing material.
Implementation Method 1
an exposure unit configured to form an electrostatic latent image on the image carrier by irradiating the image carrier with light based on image data
Implementation Method 2
a developing unit configured to develop the electrostatic latent image formed on the image carrier using a developing material
Data Source
AI summary
When an edge effect or sweeping occurs in a developing material, pixels, among a plurality of pixels that configure image data, will arise in which a developing material consumption amount rises beyond an original consumption amount. A CPU corrects the developing material consumption amount for the pixels, among the plurality of pixels that configure the image data, in which the developing material consumption amount will rise beyond the original consumption amount.