Printer Media Drive Calibration via Optical Texture Detection
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Solution Overview
Problem
Current media advance calibration methods in printers are inefficient, requiring external devices and printed marks, leading to inaccuracies in media movement, resulting in defects like banding and grain, and are costly due to media waste and ink consumption.
Innovation Solution
Integration of a media surface detector and processor within the printer to detect media advances and adapt parameters for precise media drive calibration, eliminating the need for external devices and printed marks, using an optical detector to measure media texture and apply pattern recognition for accurate calibration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If external scanning tools and printed marks are used for calibration, then media advance accuracy can be measured, but device complexity and cost increase
Solution Approach 1:
The printer performs self-calibration using its own built-in optical detector and processor. The system automatically detects media advances by analyzing texture patterns on the media surface without requiring external scanning tools or printed fiducial marks, thereby reducing device complexity while maintaining measurement precision
Solution Approach 2:
The patent replaces mechanical external scanning devices with an optical detection system integrated into the printer. The optical detector captures images of the media surface texture, and the processor analyzes these images to determine media advance, eliminating the need for external mechanical scanning equipment
2Measurement precision
If printed marks and external scanning are used for calibration, then media advance can be measured, but media waste and ink consumption increase
Solution Approach 1:
The printer uses its existing optical detection capabilities to perform calibration without requiring additional printed marks on the media. The system analyzes the natural texture patterns of the media surface, eliminating the need to consume extra media for calibration purposes
Solution Approach 2:
The calibration process recovers and reuses the media surface texture information that would otherwise be discarded. By analyzing the existing texture patterns during normal media handling, the system extracts calibration data without requiring additional media consumption
3Measurement precision
If external scanning tools are used for calibration, then calibration can be performed, but calibration time and operational complexity increase
Solution Approach 1:
The printer automatically performs calibration using its integrated optical detector and processor without requiring external tools or manual intervention. The system executes calibration routines during normal operation or idle time, significantly reducing the time and operational complexity associated with external calibration processes
Solution Approach 2:
The optical detector and processor serve dual purposes: they perform their primary function of detecting media during normal printing operations and simultaneously execute calibration measurements. This multi-functionality eliminates the need for separate external scanning devices and streamlines the overall calibration process
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 enhances media advance accuracy, reduces defects, and lowers costs by allowing self-executed calibration within the printer, minimizing waste and ink usage, with potential savings of around $30 per calibration.
Implementation Method 1
an optical detector to measure media texture
Implementation Method 2
apply pattern recognition for accurate calibration
Data Source
AI summary
Calibrating a media drive, comprising advancing media with a media drive while detecting media advances within the printer, determining an error in the media advances, and calibrating the media drive so as to at least partly compensate for the determined error.