LED Temperature-Based Colorimetry Calibration for Faster Measurement
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Solution Overview
Problem
Existing colorimetry devices require excessive time for calibration due to performing calibration after each line of color patch measurement, leading to inefficiencies in the colorimetry process.
Innovation Solution
A colorimetry device with a temperature detecting unit that determines the need for calibration based on the temperature of the light source or substrate, and a control unit that moves the colorimetry unit to a calibration member for calibration when necessary, reducing unnecessary recalibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If calibration is performed after each line of color patch measurement, then measurement precision is maintained, but time required for colorimetry increases
Solution Approach 1:
The patent applies parameter changes by monitoring temperature parameters of the light source and substrate to determine when calibration is necessary. Instead of calibrating after every measurement line, the system changes the calibration frequency based on temperature parameter thresholds, thereby reducing unnecessary calibration operations while maintaining measurement precision when temperature variations exceed acceptable ranges.
2Measurement precision
If frequent calibration is performed, then colorimetry accuracy is maintained, but productivity decreases
Solution Approach 1:
The patent implements feedback control by continuously monitoring light source temperature and substrate temperature, then using this feedback information to dynamically adjust calibration timing. The control unit receives temperature data and decides whether calibration is needed based on predetermined thresholds, creating a closed-loop system that maintains accuracy while optimizing productivity by avoiding unnecessary calibration cycles.
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 approach reduces the time required for colorimetry by minimizing unnecessary recalibrations, improving the efficiency and speed of the colorimetry process.
Implementation Method 1
a temperature detecting unit configured to detect a temperature of the light source or a temperature of the substrate
Implementation Method 2
a colorimetry unit including an irradiation unit including a light source configured to irradiate an image printed on the medium supported by the support unit with light and a substrate provided with the light source, and a light-receiving unit configured to receive reflected light that is light irradiated from the light source and reflected by the image
Data Source
AI summary
A colorimetry device includes: a colorimetry unit including an irradiation unit including a substrate provided with a LED, and a light-receiving unit configured to receive reflected light that is light irradiated from the LED and reflected by the color chart image, the colorimetry unit being configured to perform colorimetry of the color chart image; a movement unit configured to cause the colorimetry unit to reciprocate along an intersecting direction; a calibration member provided in the intersecting direction; a temperature sensor configured to detect a temperature of the LED or a temperature of the substrate; and a colorimetry device control unit configured to move the colorimetry unit by the movement unit to a calibration member and calibrate the colorimetry unit when determining that the colorimetry unit is to be calibrated for the colorimetry of the color chart image based on the temperature detected by the temperature sensor.