Printer Ink Type Detection via Multi-Wavelength Spectroscopy
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Solution Overview
Problem
Current printer technologies lack effective methods for accurately determining the presence and type of ink in ink containers, leading to inefficiencies in ink management and potential printing disruptions.
Innovation Solution
A printer system that includes an ink tank, a print head, a light source emitting light of different wavelengths, and a sensor to detect light amounts, allowing for the determination of ink type based on the detected light amounts, enabling precise ink management and monitoring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a light emitter and light receiver are used to detect ink level by receiving light passing through the ink bottle, then ink level detection is enabled, but the system cannot accurately determine ink type
Solution Approach 1:
The light receiver is divided into multiple detection units, each sensitive to specific wavelength bands. The sensor section includes first to fourth light receivers that detect different wavelength ranges (first visible band, second visible band, ultraviolet band), allowing simultaneous measurement of multiple light parameters to identify both ink level and ink type
Solution Approach 2:
The light receiver is designed to perform multiple functions: it not only detects ink level by measuring light transmission but also identifies ink type by analyzing the spectral characteristics across different wavelength bands. This multi-functional sensor replaces the need for separate detection systems
2Measurement precision
If multiple wavelength bands are detected to determine ink type, then ink type identification accuracy is improved, but device complexity increases
Solution Approach 1:
Multiple light receivers detecting different wavelength bands are integrated into a single sensor section. The first to fourth light receivers are combined in one sensor unit, allowing simultaneous detection of multiple wavelength bands without requiring separate detection systems, thus reducing overall device complexity while maintaining high measurement precision
Solution Approach 2:
The sensor section is designed as a universal detection unit that handles both ink level measurement and ink type identification through its multiple light receivers. This multi-functional design consolidates what would otherwise require separate detection systems into one integrated component
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 allows for accurate detection of ink levels and types, preventing printing disruptions and optimizing ink usage by providing real-time monitoring and management capabilities.
Implementation Method 1
a light source that emits light into the ink tank; a sensor that detects first light of a first wavelength band and second light of a second wavelength band incident from an ink tank side
Implementation Method 2
a processing section that acquires a first light amount of the first light at a position where the ink exists and a second light amount of the second light at the position where the ink exists from the sensor, and determines an ink type of the ink in the ink tank based on the first light amount and the second light amount
Data Source
AI summary
A printer includes an ink tank, a print head that performs printing using ink IK in the ink tank, a light source that emits light into the ink tank, a sensor that detects first light of a first wavelength band and second light of a second wavelength band incident from an ink tank side, in a period during which the light source emits light, and a processing section. The processing section determines the ink type of the ink in the ink tank based on a first light amount of the first light and a second light amount of the second light at a position where the ink exists.