Droplet Volume Measurement Using Test Table Profile
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Solution Overview
Problem
Existing display apparatus manufacturing methods face challenges in accurately measuring and discharging droplets onto substrates, leading to inconsistencies in the formation of organic material patterns, which affect the resolution and performance of display devices.
Innovation Solution
A method and apparatus that utilize a test table with profile measurement portions to accurately measure the volume of droplets by reflecting the surface profile of the test table and the droplet, ensuring precise discharge onto a substrate, incorporating a controller to adjust the droplet volume based on measured differences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If droplet volume is measured using conventional methods, then measurement process is simple, but measurement precision is insufficient leading to inconsistent droplet discharge
Solution Approach 1:
The patent introduces a test table as an intermediary object with a known surface profile. By measuring the surface profile change caused by the droplet on this standardized test table, the system can accurately determine droplet volume without requiring direct complex measurement of the droplet itself. The test table acts as a mediator that translates difficult droplet measurements into manageable surface profile measurements.
Solution Approach 2:
The patent replaces conventional direct mechanical or optical droplet measurement methods with a surface profile measurement approach. Instead of directly measuring the three-dimensional droplet shape, the system measures the two-dimensional surface profile of the test table before and after droplet deposition, then calculates volume from the difference. This substitution simplifies the measurement mechanism while improving precision.
2Manufacturing precision
If droplet discharge precision is improved through accurate volume measurement, then display resolution improves, but manufacturing process complexity increases
Solution Approach 1:
The patent implements preliminary measurement of the test table's surface profile before droplet discharge. By establishing a baseline surface profile in advance, the system can accurately calculate droplet volume by comparing post-discharge surface changes against this pre-established reference, thereby improving discharge precision without requiring complex real-time measurement systems.
Solution Approach 2:
The system uses feedback from surface profile measurements to control and adjust droplet discharge parameters. By continuously measuring the actual droplet volume deposited on the test table and comparing it with the target volume, the system can adjust discharge parameters to achieve consistent precision in subsequent operations, reducing the need for overly complex mechanical precision mechanisms.
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 enhances the precision of droplet discharge, improving the resolution and consistency of display apparatus manufacturing by accurately measuring and controlling the volume of droplets, thereby reducing errors and improving the overall performance of display devices.
Implementation Method 1
at least one profile measurement portion disposed adjacent to the at least one test table to measure a surface profile of the at least one test table and a surface profile of the droplet disposed on the at least one test table
Data Source
AI summary
An apparatus for manufacturing a display apparatus includes at least one test table on which a droplet is disposed, at least one profile measurement portion disposed adjacent to the at least one test table to measure a surface profile of the at least one test table and a surface profile of the droplet disposed on the at least one test table, and a controller electrically connected to the at least one profile measurement portion to measure a volume of the droplet from a difference between the surface profile of the at least one test table and the surface profile of the droplet disposed on the at least one test table.