Scanner Tray Detection Logic for Accidental Platen Scanning
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Solution Overview
Problem
Image scanning apparatuses often accidentally scan documents placed on the document table when they are inaccurately positioned on the document tray of the automatic document feeder, leading to unnecessary scanning and resource wastage.
Innovation Solution
The apparatus includes a platen, a document cover that shifts between open and closed states, a first document detector for the tray, and an open-close detector to determine the user's intention based on the document cover's state, controlling the scanning unit to either scan the document on the tray or the platen accordingly, thereby reducing accidental scanning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the sensor detects the document on the document tray, then the apparatus scans the document fed from the tray, but when the document is inaccurately placed, the sensor fails to detect it and causes accidental scanning of the document on the platen
Solution Approach 1:
The system uses feedback from both the first document detector (on tray) and the open-close detector (on platen) to make an intelligent determination about which document to scan. The control unit processes the detection results from both sensors and selectively activates the scanning unit based on this feedback, preventing accidental scanning when the tray document is not properly detected.
Solution Approach 2:
The open-close detector acts as an intermediary element that provides additional information about the platen document state. This intermediate detection mechanism allows the control unit to distinguish between intentional platen scanning and accidental scanning, mediating between the two detection systems to prevent harmful accidental scanning while maintaining reliable tray document scanning.
2Adaptability or versatility
If the apparatus scans the document on the platen when the tray document is not detected, then it provides a fallback scanning option, but it causes resource wastage when the user has no intention of scanning
Solution Approach 1:
The system processes feedback from both detection sensors to make an intelligent decision about scanning. The control unit analyzes the combined information from the first document detector and open-close detector to determine whether the user intends to scan the platen document, thereby avoiding unnecessary energy consumption while maintaining scanning flexibility when truly needed.
Solution Approach 2:
The system changes the scanning decision parameter based on the detection results. Instead of a fixed fallback scanning behavior, the control unit dynamically adjusts the scanning action based on the state of both detectors, activating scanning only when the platen document detection indicates user intention, thus reducing energy waste.
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 solution effectively reduces accidental scanning of documents on the platen when they are inaccurately placed on the document tray, saving resources and preventing wastage by determining the user's scanning intent based on the document cover's state.
Implementation Method 1
an open-close detector configured to detect the state of the document cover
Implementation Method 2
a first document-detector configured to detect the document placed on the document tray
Implementation Method 3
a scanning unit configured to selectively scan the document placed on the platen and the document at the scanning position fed from the document tray and generate image data
Data Source
AI summary
An image scanning apparatus including an open-close detector configured to detect an open-close state of a document cover, a first document-detector, a scanning unit configured to scan a document placed on a platen or a document fed from a document tray, a control unit, and a commanding unit configured to input a start command to start scanning. When the start command is inputted, when the document placed on the document tray is detected by the first document-detector, the control unit controls the scanning unit to scan the document fed from the document tray, and when the document placed on the document tray is not detected, the control unit determines whether to execute scanning of the document placed on the platen. The determination is performed based on a result of detection performed by the open-close detector.