Print Control Device Using Dual-Axis Paper Sensor
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Solution Overview
Problem
Existing print control technologies fail to accurately consider the longitudinal direction of a print sheet, leading to inadequate printing when the detected sheet width is used as the sole reference, and errors in sheet width detection can result in unsuitable printing due to incorrect identification of sheet size.
Innovation Solution
A print control device and method that uses a paper sensor to detect the width and length of a print sheet, employing a CPU to determine the paper size by referencing a paper size table and adjusting the printing image accordingly, ensuring accurate printing even when the detected size differs from the set size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the width of a print sheet is detected by a sensor and used as the sole reference for enlargement or reduction, then the necessity for user paper size selection operations is eliminated, but the longitudinal direction of the print sheet is not considered leading to inadequate printing
Solution Approach 1:
The patent transitions from one-dimensional width detection to two-dimensional size determination by incorporating both width and length detection. The CPU calculates paper size based on width detected by the paper width sensor and length detected by the paper length sensor, enabling accurate printing that considers both dimensions of the print sheet.
2Device complexity
If only width detection is used to identify paper size, then the detection process is simplified, but detection errors can result in incorrect identification of sheet size
Solution Approach 1:
The system uses feedback from both the paper width sensor and paper length sensor to verify and determine the correct paper size. The CPU compares the detected width and length against stored paper size information, using this feedback loop to accurately identify the paper size even when detection errors occur in individual measurements.
Data Source
AI summary
In a case that a setting size for a print medium is set in print target data and the setting size has not been acquired as a candidate, a size having an aspect ratio corresponding to the aspect ratio of the setting size is specified. Next, a printer is controlled to print an image based on the print target data having a size corresponding to the size.