Jet Discharge Nozzle for Low Aspect Ratio Liquid Lines
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Solution Overview
Problem
Jet type discharge devices struggle to form application lines with a small height-to-width ratio, which is required for applications like low-height light-blocking in liquid crystal display devices, and face difficulties in applying liquid material to step portions efficiently.
Innovation Solution
A jet type discharge device with a nozzle having multiple discharge ports arranged on a straight line, where the distance between ports allows globs of liquid material to join together, forming an application line with a small height-to-width ratio, and a relative driving device moves the discharge device and application target to enable linear application, including on step portions by adjusting nozzle orientation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a jet type discharge device is used to rapidly form application lines, then productivity is improved, but the height-to-width ratio of the application line cross-section becomes too large
Solution Approach 1:
The nozzle is divided into multiple discharge ports (first discharge port and second discharge port) arranged in the width direction. Each discharge port discharges liquid material that forms a separate glob, and these globs join together after landing to form the application line. This segmentation allows control of the height-to-width ratio while maintaining rapid formation speed.
2Productivity
If liquid material is discharged to form continuous application lines, then productivity is improved, but it becomes difficult to apply liquid material onto step portions effectively
Solution Approach 1:
The discharge device can dynamically adjust which discharge ports are active based on the application target geometry. For step portions, the device can selectively discharge liquid material from appropriate ports to accommodate different heights and positions, enabling effective application on complex surfaces while maintaining productivity.
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 the formation of application lines with a small height-to-width ratio and allows for one-time linear application on step portions, improving the efficiency and precision of line-drawing applications, particularly suitable for liquid crystal display devices.
Implementation Method 1
A so-called jet type discharge device discharges a liquid material in the form of a droplet from a discharge port by a forward moving process of a plunger rod disposed in a liquid chamber
Implementation Method 2
successively discharging the liquid material such that a plurality of liquid globs having been discharged from the plurality of discharge ports have no contact with each other before landing on the application target, and letting the globs of the liquid material having landed join together on the application target
Data Source
AI summary
A discharge device includes a nozzle (50) having a plurality of discharge ports, a liquid chamber (26) communicating with the plurality of discharge ports via a plurality of discharge flow paths, and a plunger rod (18) that reciprocates in the liquid chamber and is narrower than the liquid chamber. The plurality of discharge ports (62) is arranged un a straight nozzle arrangement line, and arranged with such a distance therebetween that globs of a liquid material having landed on an application target join together to form an application line. A plurality of liquid globs having been discharged from the plurality of discharge ports (62) have no contact with each other before landing on the application target, and letting the globs of the liquid material having landed join together on the application target.