Flexible Printed Substrate Electrode Wiring Width for Liquid Detection
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Solution Overview
Problem
Existing storage devices for liquids, such as ink tanks in printers, face challenges in accurately detecting the remaining amount of liquid due to limitations in detection accuracy, which can lead to inefficient use and potential running out of ink at undesirable times.
Innovation Solution
A storage device with a flexible printed substrate configuration, including a first electrode and a second electrode, where the width of the wiring in the direction of liquid decrease is narrower than the electrodes, enhancing capacitance measurement and detection accuracy by optimizing the arrangement of electrodes and wiring within the storage section.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the wiring width in the liquid decrease direction is made smaller than the electrode width, then the detection accuracy of liquid level is improved, but the manufacturing precision requirement increases
Solution Approach 1:
The patent applies parameter changes by deliberately setting the wiring width parameter to be smaller than the electrode width parameter. This parameter relationship creates a detection structure where the wiring acts as a reference element, improving the capacitance-based liquid level detection accuracy by establishing a clear geometric relationship between the wiring and electrode dimensions.
2Measurement precision
If the wiring width is made narrower than the electrode width, then the capacitance measurement accuracy is enhanced, but the device complexity increases
Solution Approach 1:
The patent applies local quality by creating a specific geometric relationship between the wiring and electrode at the detection region. The wiring is positioned with its width smaller than the electrode width, creating a localized detection zone where this dimensional relationship is critical for accurate capacitance measurement, while other parts of the device maintain simpler structures.
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 configuration improves the detection accuracy of the liquid level, allowing for precise monitoring of the remaining ink amount, reducing the likelihood of unexpected ink depletion and optimizing ink usage.
Implementation Method 1
a detection circuit that detects a storage amount of the liquid stored in the storage device
Data Source
AI summary
A storage device includes a storage section including a plurality of walls and storing an object in a space surrounded by the plurality of walls; and a flexible printed substrate including a first electrode provided in a first wall among the plurality of walls, a second electrode provided in a second wall among the plurality of walls, a first wiring coupled to the first electrode, and a second wiring coupled to the second electrode, in which a width of the first wiring in a first direction, which is a direction in which the object decreases in the storage section, is smaller than a width of the first electrode in the first direction, and a width of the second wiring in the first direction is smaller than a width of the second electrode in the first direction.