Recording Medium Type Determination Using Moisture Correction
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Solution Overview
Problem
Existing methods for determining the type of a recording medium in image forming apparatuses do not adequately consider moisture content, leading to variations in detection accuracy and image quality.
Innovation Solution
An apparatus that includes a detection unit for physical characteristics, a measurement unit for moisture content, and a determination unit that corrects characteristic values or rules based on measured moisture content to improve detection accuracy by adjusting image forming conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If detection methods (ultrasonic wave detection or CMOS sensor detection) are used to determine recording medium type, then image quality can be maintained at a certain level, but detection accuracy deteriorates due to variations caused by moisture content
Solution Approach 1:
The invention changes the detection parameters by introducing moisture content as an additional parameter to the existing detection methods. The determination unit uses both the original detection value (from ultrasonic waves or CMOS sensor) and the moisture content value to determine recording medium type, thereby compensating for variations caused by moisture content and improving detection accuracy.
Solution Approach 2:
The invention implements feedback by measuring moisture content and using this information to correct or adjust the determination of recording medium type. The determination unit refers to the moisture content value when determining the type, effectively using the feedback from moisture measurement to improve the accuracy of the detection result.
2Reliability
If image forming conditions are adjusted according to detected recording medium type, then image quality can be maintained, but reliability deteriorates due to inaccurate detection caused by moisture content variations
Solution Approach 1:
The invention changes the parameters used for determining recording medium type by incorporating moisture content as an additional factor. This ensures that the determination is not based solely on potentially misleading detection values that vary with moisture content, but on a combined assessment that includes moisture information, thereby improving reliability.
Solution Approach 2:
The invention provides beforehand cushioning by measuring moisture content in advance and using this information to pre-correct or pre-adjust the determination of recording medium type. This prevents inaccurate determinations from affecting image forming reliability before they can cause problems.
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
Enhances detection accuracy for the type of recording medium, allowing for more precise adjustment of image forming conditions and improved image quality by accounting for moisture content variations.
Implementation Method 1
Japanese Patent Laid-Open No. 2004-107030 proposes detecting the grammage (weight per unit of area) of a recording medium using ultrasonic waves
Implementation Method 2
A measurement unit is configured to measure a moisture content correlated with a moisture content of the recording medium
Data Source
AI summary
An apparatus for determining a type of a recording medium is provided. A detection unit detects a characteristic value indicating a physical characteristic of a recording medium. A measurement unit measures a moisture content correlated with a moisture content of the recording medium. A determination unit determines the type of the recording medium based on the moisture content and the characteristic value. The determination unit may correct the characteristic value using the moisture content or correct a rule for determining the type of the recording medium using the moisture content unit, and determines the type of the recording medium in accordance with the corrected characteristic value or the corrected rule.