Transparent Liquid Inspection Using Monochromatic Light Contrast
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Solution Overview
Problem
Existing inspection methods struggle to accurately detect faulty discharge of transparent liquids in inkjet recording apparatuses, particularly when discharged onto colored streaks, due to the difficulty in distinguishing the transparent ink from the colored background.
Innovation Solution
An inspection apparatus equipped with a liquid discharge head that discharges transparent liquids and a first light source emitting light with a single peak wavelength, causing a difference between brightness and darkness to facilitate detection of faulty discharge patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If transparent liquid is discharged onto colored background, then the liquid can be discharged effectively, but the discharge detection becomes difficult
Solution Approach 1:
The patent uses light sources with specific wavelengths that interact with the transparent liquid to create brightness differences. By selecting light wavelengths that cause refraction or reflection changes in the transparent liquid, the inspection apparatus creates visible contrast between the liquid pattern and the colored background, enabling accurate discharge detection.
Solution Approach 2:
The patent introduces light as an intermediary substance between the transparent liquid and the detection system. The light interacts with the liquid to produce optical effects (brightness variations) that make the invisible transparent liquid visible for inspection purposes.
2Measurement precision
If conventional inspection methods are used, then the apparatus structure remains simple, but the inspection accuracy deteriorates
Solution Approach 1:
The patent replaces complex mechanical inspection systems with an optical-based inspection system. Instead of using mechanical sensors or complex contact-based detection methods, the invention uses light sources and optical detection to achieve high inspection accuracy with a simpler apparatus structure.
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
Enables effective detection of faulty discharge of transparent liquids by creating a visible contrast between the transparent liquid and the background, improving the accuracy of inspection and reducing maintenance time and ink usage.
Implementation Method 1
a first light source configured to irradiate a pattern formed by the transparent liquid discharged onto the discharged object with light having a single peak wavelength to cause a difference between brightness and darkness
Data Source
AI summary
An inspection apparatus includes a liquid discharge head and a first light source. The liquid discharge head is configured to discharge a transparent liquid onto a discharged object. The first light source is configured to irradiate a pattern formed by the transparent liquid discharged onto the discharged object with light having a single peak wavelength to cause a difference between brightness and darkness.