Image Reading Device Position Detection Without End Marks
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Solution Overview
Problem
Conventional image forming apparatuses require end marks for detecting the start position of colorimetry patches, which narrows the usable image region on the recording medium, increases ink and toner consumption, and is inefficient.
Innovation Solution
An image reading device with a conveyance path, a colorimeter, a detector, and a hardware processor that controls the colorimeter to read images based on the detector's position detection, allowing accurate patch reading without end marks, enabling the expansion of the usable image region and reducing toner consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If end marks are formed on the recording medium to detect the start position of colorimetry, then the start position detection is reliable, but the usable image region is reduced and toner consumption increases
Solution Approach 1:
The invention extracts and removes the end mark from the system by replacing it with a detector that reads position information from a fixed position on the recording medium (such as a corner or edge), thereby eliminating the need for dedicated end mark regions and expanding the usable image area
Solution Approach 2:
The invention introduces an intermediary detector that reads position information from a fixed location on the recording medium, which then provides this information to the control unit to determine the start position of colorimetry, thereby eliminating the need for end marks while maintaining reliable position detection
2Reliability
If end marks are formed on the recording medium, then the start position of colorimetry can be detected, but ink and toner consumption increases
Solution Approach 1:
The invention extracts and removes the end mark from the system by replacing it with a detector that reads position information from a fixed position on the recording medium (such as a corner or edge), thereby eliminating the need for dedicated end mark regions and expanding the usable image area
Solution Approach 2:
The invention introduces an intermediary detector that reads position information from a fixed location on the recording medium, which then provides this information to the control unit to determine the start position of colorimetry, thereby eliminating the need for end marks while maintaining reliable position detection
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 allows for accurate reading of patches and creation of high-quality images without the need for end marks, expanding the usable image region and reducing toner consumption by enabling precise colorimetry and image formation.
Implementation Method 1
a detector that detects a position of the recording medium in a direction intersecting a conveyance direction of the recording medium
Implementation Method 2
a colorimeter that reads an image to be subjected to colorimetry, the image being recorded on the recording medium
Data Source
AI summary
An image reading device includes a conveyance path along which a recording medium is conveyed, a colorimeter that reads an image to be subjected to colorimetry, the image being recorded on the recording medium conveyed on the conveyance path, a detector that detects a position of the recording medium in a direction intersecting a conveyance direction of the recording medium; and a first hardware processor that controls the colorimeter so as to read the image to be subjected to colorimetry on a basis of a detection result by the detector.