Display Droplet Deposition Layout to Prevent Moiré Patterns
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Solution Overview
Problem
The concentration of scatterers in liquid droplets used in display apparatuses can lead to a moiré phenomenon, causing improper operation and visibility issues.
Innovation Solution
A method of manufacturing a display apparatus involves discharging liquid droplets in specific areas of a substrate while moving the discharge part by varying distances and directions, ensuring uniform distribution of scatterers and quantum dots, and forming layers such as color filters and encapsulation layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If liquid droplets including scatterers are supplied and arranged on a substrate by using a nozzle, then the emission layer or color converting layer can be formed, but a moiré phenomenon may occur due to the concentration of scatterers
Solution Approach 1:
The patent applies dynamics by making the discharge part movable with variable movement distances. The discharge part moves by a first distance when discharging liquid droplets in a first area, and by a second distance (different from the first) when discharging in a second area. This dynamic adjustment of movement parameters ensures uniform distribution of scatterers across different areas of the substrate, preventing the moiré phenomenon while maintaining consistent layer formation quality.
Solution Approach 2:
The patent changes the movement parameter (distance) of the discharge part based on the area being processed. By adjusting the movement distance parameter dynamically according to the discharge area, the system achieves uniform scatterer concentration across the entire substrate surface, resolving the moiré issue without compromising the formation quality of the emission or color converting layers.
2Ease of manufacture
If the nozzle is moved by the same distance, then the discharge process is simple, but the moiré phenomenon may severe and may be visible to the user
Solution Approach 1:
The system transitions from a static discharge part with fixed movement distance to a dynamic discharge part with variable movement distances. The controller adjusts the movement distance based on the discharge area, enabling uniform scatterer distribution while maintaining automated operation. This dynamic approach balances manufacturing simplicity with quality requirements by eliminating the need for manual intervention while preventing moiré patterns.
Solution Approach 2:
The system incorporates feedback control where the controller determines the appropriate movement distance based on the discharge area being processed. This feedback mechanism ensures that the discharge part moves by the correct distance (first distance or second distance) for each area, maintaining uniform scatterer concentration and preventing moiré phenomenon while keeping the process automated and simple to operate.
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 ensures uniform concentration of scatterers and quantum dots, preventing moiré phenomena and enhancing display performance.
Implementation Method 1
Liquid droplets including scatterers may be supplied and arranged on a substrate by using a nozzle to form an emission layer or color converting layer
Data Source
AI summary
A method of manufacturing a display apparatus includes discharging liquid droplets in a first area of a substrate, moving a discharge part by a first distance along a side of the substrate and discharging the liquid droplets in a second area of the substrate, and moving the discharge part by a second distance along the side of the substrate and discharging the liquid droplets in a third area of the substrate. The first distance is different from the second distance.