OLED Deposition Angle Control via Sliding Member
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Solution Overview
Problem
In the manufacturing of organic light emitting diode (OLED) displays, existing deposition methods face challenges in maintaining a consistent deposition angle over time, leading to non-uniform thin film thickness and luminance across pixels, which affects the overall display quality and manufacturing efficiency.
Innovation Solution
A deposition apparatus with angle control members, comprising sliding members that can move forward and backward to adjust the emission direction of deposition materials, ensuring a uniform deposition angle even as process time increases, allowing for the formation of uniform thin films across the entire pixel arrangement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If vacuum deposition method is used to form thin films on substrates, then metal organic material or electrode can be deposited, but deposition angle changes as process time increases leading to non-uniform thin film thickness
Solution Approach 1:
The patent applies the Dynamics principle by making the angle control member movable rather than fixed. The angle control member can adjust its position to change the emission direction angle of the deposition material, allowing the system to adapt to deposition angle changes that occur over time. This dynamic adjustment capability enables compensation for angle drift during the deposition process, maintaining uniform thin film thickness even as process time increases.
2Manufacturing precision
If deposition angle is not controlled consistently, then manufacturing process is simpler, but thin film thickness and luminance uniformity across pixels deteriorates
Solution Approach 1:
The patent introduces an angle control member as an intermediary component between the deposition source and the substrate. This angle control member serves as a mediator that adjusts the emission direction of the deposition material, enabling precise control of the deposition angle without fundamentally changing the core deposition process. The intermediary component adds minimal complexity while achieving the desired luminance uniformity across pixels.
3Manufacturing precision
If angle control member is made movable to adjust emission direction, then deposition angle uniformity improves, but device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the angle control function into separate, modular angle control members positioned at different locations. Each angle control member can be independently adjusted to control the emission direction from specific deposition sources. This segmented approach allows for localized angle adjustments without requiring complex centralized control mechanisms, thereby improving deposition angle consistency while limiting overall device complexity.
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 solution ensures improved luminance uniformity across OLED pixels, simplifies the manufacturing process, and enhances manufacturing yield by allowing for continuous operation without stopping the process, even when conditions change, and is applicable to large-sized substrates.
Implementation Method 1
a vacuum deposition method is used, and thus metal used as an organic material or an electrode forms a thin film on a flat plate by depositing the corresponding material in a vacuum condition
Implementation Method 2
the organic material is vaporized or sublimated using a deposition source unit and is thus deposited on the substrate
Implementation Method 3
the organic material is vaporized or sublimated using a deposition source unit and is thus deposited on the substrate
Data Source
AI summary
A deposition apparatus includes a deposition source emitting a deposition material and an angle control member disposed on both sides of the deposition source and controlling an emission direction angle of the deposition material. The angle control member includes a housing having an internal space opened in an emission direction of the deposition material and a sliding member having a first end which is inserted into the internal space and a second end disposed on an emission path of the deposition material. The sliding member is movable forward and backward in the emission direction of the deposition material along the internal space. A method of manufacturing an organic light emitting diode (OLED) display which uses the deposition apparatus is also disclosed.