Liquid Discharge Head Temperature Detection Accuracy
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Solution Overview
Problem
Existing liquid discharge heads face challenges in improving the detection accuracy of temperature detection elements, which affects the precise drive control of resistive heating elements, leading to suboptimal liquid discharge performance.
Innovation Solution
A liquid discharge head configuration with a temperature detection element arranged between the resistive heating element and the bubble chamber in a conductive layer closest to the bubble chamber, allowing for enhanced detection accuracy and functionality as an anti-cavitation film, reducing manufacturing costs and improving discharge quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the temperature detection element is arranged in a conventional position, then the structure is simple, but the detection accuracy is insufficient
Solution Approach 1:
The temperature detection element is merged with the conductive layers of the insulating member, specifically utilizing the uppermost conductive layer as the temperature detection element. This integration eliminates the need for separate temperature detection structures while improving detection accuracy through proximity to the bubble chamber.
Solution Approach 2:
The uppermost conductive layer of the insulating member serves dual functions: as part of the insulating structure and as the temperature detection element. This multi-functionality reduces the number of separate components while enhancing temperature detection capability near the bubble chamber.
2Measurement precision
If the temperature detection element is positioned closer to the bubble chamber, then the detection accuracy improves, but the risk of cavitation damage increases
Solution Approach 1:
The insulating member with its conductive layers is positioned between the resistive heating element and the bubble chamber, providing protective cushioning to the temperature detection element against cavitation damage while maintaining close proximity for accurate temperature detection.
Solution Approach 2:
The insulating member acts as an intermediary structure that allows the temperature detection element to be positioned near the bubble chamber for accurate detection while protecting it from harmful cavitation effects. The conductive layer integrates temperature detection functionality within this protective intermediary 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
This configuration enhances the detection accuracy of the temperature detection element, enabling more precise drive control of the resistive heating elements, leading to improved liquid discharge performance and reduced manufacturing costs.
Implementation Method 1
a resistive heating element (102) arranged in the insulating layer (101) and configured to generate thermal energy used to discharge a liquid
Implementation Method 2
a temperature detection element (105) capable of detecting a temperature in the bubble chamber (112)
Implementation Method 3
the temperature detection element (105) is arranged between the resistive heating element (102) and the bubble chamber (112) and in a conductive layer closest to the bubble chamber
Data Source
AI summary
A liquid discharge head, comprising an insulating member arranged on a substrate, a resistive heating element arranged in the insulating member and configured to generate thermal energy used to discharge a liquid, a bubble chamber provided above the insulating member and configured to generate bubbles of the liquid based on the thermal energy, and a temperature detection element capable of detecting a temperature in the bubble chamber, wherein the temperature detection element is arranged between the resistive heating element and the bubble chamber and in a conductive layer closest to the bubble chamber in a plurality of conductive layers provided with respect to the insulating member.