Image Scanner Illumination Lamp Positioning for Stacked Document Visibility
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Solution Overview
Problem
Conventional image reading apparatuses face challenges in maintaining consistent visibility of the original discharge portion, especially when multiple originals are stacked, due to reduced illumination range and potential mixing of documents between users, as existing solutions either intercept illumination or fail to provide stable recognition.
Innovation Solution
An image reading apparatus with an illumination lamp positioned outside the original stacking area but below the placing portion, ensuring that the extended portion of the discharge area is illuminated, allowing for stable recognition of the discharge portion regardless of the number of stacked originals and preventing document mixing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the illumination lamp is positioned above the stacking portion, then the stacking area can be illuminated, but the illumination range shrinks when multiple originals are stacked and the discharged original blocks the illumination light
Solution Approach 1:
The illumination lamp is extracted from the stacking area and repositioned to the original discharge portion, separating the illumination function from the stacking space to eliminate the blocking problem caused by stacked originals
Solution Approach 2:
The original discharge portion acts as an intermediary structure that carries both the discharged original and the illumination lamp, allowing the lamp to illuminate the stacking area indirectly without being blocked by the originals
2Loss of information
If the illumination lamp illuminates the stacking area, then the discharged original can be visually recognized, but the illumination light is intercepted by the discharged original during discharge operation
Solution Approach 1:
The illumination lamp is extracted from the stacking area and repositioned to the original discharge portion, allowing it to illuminate the discharged original without being intercepted by it during discharge
3Quantity of substance
If the distance between the uppermost original and illumination lamp is decreased, then more originals can be stacked, but the range of illumination shrinks making it difficult to visually recognize the illuminated area
Solution Approach 1:
The illumination lamp is extracted from the stacking area and positioned at the original discharge portion, where it can illuminate the discharged original regardless of the number of originals in the stack, maintaining constant illumination range
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 provides consistent and stable visibility of the original discharge portion, reducing the risk of document mixing and improving user awareness of discharged documents, while conserving energy by only illuminating when necessary.
Implementation Method 1
an illuminating portion (illumination lamp 26) which is disposed above the stacking portion and below the placing portion to illuminate the stacking portion
Data Source
AI summary
An image reading apparatus comprising: a placing portion on which an original being fed is placed; an original conveying portion which conveys the original placed on the placing portion; an image reading portion which reads an image on the original conveyed by the original conveying portion; an stacking portion which is disposed under the placing portion and on which the original read by the image reading portion is stacked; and an illuminating portion which is disposed above the stacking portion and below the placing portion to illuminate the stacking portion, wherein the illuminating portion is disposed outside an original stacking area, that a maximum-sized original in a width direction orthogonal to an original conveyance direction is stacked, in the width direction.