Flatbed Scanner Scan Area Indicator for Scaling Alignment
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Solution Overview
Problem
Positioning documents correctly on flatbed scanners for accurate scanning, especially when different scaling is required, can be difficult due to the need for precise alignment and varying scan areas.
Innovation Solution
The scanner incorporates a scan area indicator system that uses light sources and actuators to visually cue users on the correct positioning of documents based on selected scaling values, providing modes for spot, line, and window indications to facilitate proper alignment and utilization of available space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If visual indication systems are added to indicate scan area, then ease of operation is improved, but device complexity increases
Solution Approach 1:
A visible indication mechanism (light source and movable indicator) is introduced as an intermediary between the scanner's internal scan area definition and the user. This indicator visually marks the scan area boundaries on the platen, making the abstract concept of scan area concrete and easy to understand, thereby improving ease of operation without requiring complex software interfaces or additional hardware beyond the simple indicator system.
Solution Approach 2:
The patent replaces complex software-based or electronic display-based scan area indication with a simple optical-mechanical system. A light source illuminates a movable indicator that physically traces the scan area boundaries on the platen surface. This mechanical-optical approach is simpler than using LCD displays or complex software overlays, resolving the contradiction by providing clear visual guidance while maintaining system simplicity.
2Adaptability or versatility
If multiple indication modes (spot, line, window) are provided, then adaptability is improved, but device complexity increases
Solution Approach 1:
The indication system is made dynamic and adjustable, allowing the indicator to change its form (spot, line, or window) based on the scanning requirements. The movable indicator can be positioned and shaped differently to match various scan area configurations, providing adaptability for different scanning scenarios while using a single flexible mechanism rather than multiple fixed systems.
Solution Approach 2:
A single indication mechanism is designed to perform multiple functions by changing its configuration. The same light source and indicator assembly can create spot indications, line indications, or window indications depending on the scan area definition, eliminating the need for separate indication systems for each mode and reducing overall device complexity while maintaining versatility.
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 ensures accurate document positioning, reduces complexity, and allows for efficient use of space by indicating the scan area dimensions, enabling proper scanning and scaling operations without additional cost or complexity.
Implementation Method 1
a light source configured to emit a generally non-diffuse visible light
Implementation Method 2
a movable indicator configured to reflect or block the visible light to form a visual representation
Data Source
AI summary
An apparatus may include a transparent platen, a command interface, a scanner unit, a controller and an indicator. The command interface is to receive externally originating instructions including a selected scaling value, other than 100%, for a scanning operation of a document resting against the transparent platen, wherein contents of the document to be scanned are proportionally magnified or shrunk based on the selected scaling value The controller controls a scanner unit to capture a portion of the transparent platen, the portion having borders automatically determined and proportionally changed by the controller based upon the selected scaling value. The indicator provides a visible indication of the portion.