Switchable Background Backing for Image Reading Accuracy
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Solution Overview
Problem
Existing image reading apparatuses struggle to accurately read and inspect images printed on white print media and transparent films due to the inability to distinguish between the image and the white background, leading to reduced productivity in printing processes.
Innovation Solution
An image reading apparatus with a backing part that can switch its background color to multiple colors based on the type of print medium and the color of the image, allowing for appropriate reading and inspection of images on both white and non-white media.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a white background is used for reading images, then images on white print media can be read accurately, but images on transparent films or colored media cannot be distinguished from the background
Solution Approach 1:
The backing part is made switchable between white and black colors based on the type of print medium being used. When a transparent film or colored media is detected, the backing part switches to black to provide contrast, whereas for white print media it remains white. This dynamic adaptation resolves the contradiction by allowing the system to maintain high reading accuracy across different media types.
Solution Approach 2:
The color parameter of the backing part is changed according to the print medium type. The control unit detects the medium type and accordingly changes the backing part's color from white to black or vice versa, enabling accurate reading regardless of the media being used.
2Measurement precision
If manual switching between white and black background measurement is performed, then appropriate inspection for each background color can be achieved, but productivity is reduced due to time-consuming manual operation
Solution Approach 1:
The system performs self-service by automatically detecting the print medium type and switching the backing part color without manual intervention. The control unit monitors the medium type and autonomously adjusts the backing part, eliminating the need for manual switching while maintaining inspection accuracy.
Solution Approach 2:
The control unit receives feedback about the print medium type and automatically adjusts the backing part color in response. This feedback mechanism enables the system to adapt to different media types in real-time, maintaining both accuracy and productivity.
3Device complexity
If a fixed white background is used, then the reading apparatus is simple in structure, but it cannot handle transparent films or colored media effectively
Solution Approach 1:
The backing part is designed with switchable color capability, transforming from a static white surface to a dynamic element that can change between white and black. This adds minimal complexity while dramatically improving adaptability to handle transparent films and colored media effectively.
Data Source
AI summary
An image reading apparatus includes: a reader that reads an image formed on a print medium; and a backing part that is disposed at a position facing the reader and is capable of switching a color of a portion to be a background of the print medium upon reading by the reader to a plurality of colors according to a type of the print medium and/or a color read from the print medium.