Multi-Size Reference Point Assembly for Inkjet Dispensing
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Solution Overview
Problem
The challenge in manufacturing high-resolution display elements, such as OLED and QLED, is accurately managing the discharge point of chemical solutions from inkjet heads due to the small size of reference points being outside the field of view of confirming units, making it difficult to set the position of measurement units accurately.
Innovation Solution
An assembly and apparatus that generate and confirm at least two reference points of different sizes with a shared central axis, using a single reference point confirming unit, such as a vision camera, to facilitate accurate positioning and measurement of the inkjet head discharge dots.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single confirming unit is used to confirm reference points, then the device complexity is reduced, but the measurement precision deteriorates when the reference point size is very small and outside the FOV range
Solution Approach 1:
The reference point is segmented into multiple size variations (first reference point and second reference point) that share the same central axis. This segmentation allows the single confirming unit to detect different size versions of the reference point, ensuring accurate position confirmation even when the original small reference point is outside the FOV range.
Solution Approach 2:
The solution introduces a size dimension to the reference point by creating multiple reference points with different sizes but identical central positions. This dimensional transformation allows the confirming unit to capture at least one reference point within its FOV range, resolving the issue of the original small reference point being undetectable.
2Manufacturing precision
If the reference point size is kept very small for high precision positioning, then the manufacturing precision is improved, but the ease of operation deteriorates as the reference point becomes invisible to the confirming unit
Solution Approach 1:
Different parts of the reference point system have different sizes tailored to their specific functions. The multiple reference points share the same central axis (maintaining positioning precision) but have different sizes, with at least one size being large enough to be visible and confirmable by the confirming unit within its FOV range.
3Ease of operation
If multiple reference points of different sizes are generated, then the ease of operation is improved by ensuring visibility, but the device complexity increases
Solution Approach 1:
The reference point generation system is designed to generate multiple size variations of reference points using a single generation mechanism. This multi-functional capability allows the same system to produce both small reference points (for high precision positioning) and large reference points (for easy confirmation), avoiding the need for separate systems for each function.
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 approach allows for easier and more accurate setting of measurement units, ensuring precise discharge of chemical solutions onto densely packed pixels, enhancing the manufacturing process of high-resolution display elements.
Implementation Method 1
a reference point generating unit configured to generate at least two reference points of different sizes having a same central axis at a same position
Implementation Method 2
a reference point confirming unit configured to confirm both of the at least two reference points using only one in one place... different sizes for the at least two reference points are within a range satisfying a FOV of the vision camera
Data Source
AI summary
An apparatus for dispensing chemical solution includes: a printing unit configured to perform a chemical solution discharge process using an inkjet head, a maintenance unit that maintenance is performed on the inkjet head, and a reference point confirming unit including a reference point generating unit and a reference point confirming unit. The reference point generating unit is configured to generate a first reference point provided as a reference point when measuring discharge dot of chemical solution discharged from the inkjet head and a second reference point provided as a reference point when setting a measurement unit used for measuring the discharge dot. The reference point generating unit is configured to generate the first reference point and the second reference point to have a same central axis at a same position while having different sizes. The reference point confirming unit is configured to confirm both the first reference point and the second reference point using only one in one place.