Inkjet Scanner Edge Detection Speed Control
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Solution Overview
Problem
Existing ink-jet recording apparatuses face challenges in achieving high-speed marginless image recording due to the time-consuming process of detecting the edge positions of the recording medium, which hinders efficient image recording across the entire medium.
Innovation Solution
An image recording apparatus and method that incorporates a conveying mechanism and a scanning carriage with a detector to quickly sense the edges of the recording medium, allowing for precise detection and control of the scanning carriage's speed to optimize edge detection across the medium, enabling high-speed marginless recording.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the media sensor moves at low speed to detect edge positions accurately, then the detection precision is improved, but the image recording time increases
Solution Approach 1:
The patent divides the recording medium into multiple detection regions (leading edge detection region and intermediate detection region) and uses multiple detectors to simultaneously detect edge positions in different areas. This segmentation allows the system to detect all necessary edge positions in parallel rather than sequentially, improving detection speed while maintaining precision.
Solution Approach 2:
The patent performs preliminary detection of edge positions in the leading edge detection region before the main recording process. By detecting edge positions in advance and storing them, the system prepares the necessary information beforehand, allowing the recording process to proceed without waiting for sequential detection, thus reducing overall recording time.
2Measurement precision
If the media sensor is mounted on the carriage to detect edge positions, then the detection capability is improved, but the recording speed decreases
Solution Approach 1:
The patent combines multiple detectors and detection regions into a single integrated detection system mounted on the carriage. By merging the detection functions into one unified system that operates simultaneously across multiple regions, the patent achieves both comprehensive detection capability and high recording speed without the need for sequential operations.
Solution Approach 2:
The patent transitions from one-dimensional sequential detection to two-dimensional simultaneous detection by arranging detectors across multiple regions (leading edge and intermediate regions) that can detect edge positions in parallel. This dimensional change in the detection approach allows the system to gather all necessary information simultaneously rather than sequentially, improving productivity.
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 enables rapid and accurate detection of the recording medium's edges, significantly reducing the time required for image recording and enhancing the efficiency of marginless recording processes.
Implementation Method 1
Light transmitted from the light transmitting element is reflected on a recording medium and the presence of a recording medium is detected as the light receiving element receives the reflected light
Data Source
AI summary
An image recording apparatus includes a conveying mechanism for conveying a recording medium in a conveying direction, and a scanning carriage including a recording head for and a detector. The detector detects a first edge and a second edge of the recording medium in a leading edge detection region and in an intermediate detection region located between the leading edge detection region and the trailing edge of the recording medium. The scanning carriage moves in a scanning direction orthogonal to the conveying direction. Moreover, the image recording apparatus includes a storing unit for storing a first position of the first edge and a second position of the second edge, which are detected by the detector. The image recording apparatus further includes a controller for controlling movement of the scanning carriage. The controller controls a moving speed of the scanning carriage, such that the detector detects across the recording medium in the scanning direction including the first edge and the second edge. The detector detects the first and the second edge according to the first position of the first and the second position of the second edge in a leading edge detection region.