OLED Solution Spraying Apparatus with In-Line Spectrometer
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Solution Overview
Problem
Existing OLED display manufacturing processes lack efficient methods for ensuring uniform concentration of light emissive materials, leading to potential thickness variations and non-uniform light generation in organic emission layers.
Innovation Solution
A solution-providing apparatus comprising a storage unit, spraying unit, emission-inducing unit, and spectrometer that measures and adjusts the concentration of light emissive materials by applying energy to induce light emission and analyzing wavelength and intensity to control the amount of solution sprayed, ensuring uniform deposition and curing of organic emission layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional spraying methods are used to deposit solution onto substrate, then the manufacturing process is simple, but the concentration of light emissive materials is not uniform leading to thickness variations
Solution Approach 1:
The patent applies preliminary action by measuring the concentration of the solution before spraying onto the substrate. The spectrometer analyzes the light emissive material concentration in advance, allowing the system to adjust subsequent spraying parameters to ensure uniform deposition and prevent thickness variations in the organic emission layer.
Solution Approach 2:
The patent implements feedback control by using the spectrometer to continuously monitor solution concentration and automatically adjusting the spraying process based on measured values. The controller receives concentration data and modifies spraying parameters in real-time to maintain uniform deposition, creating a closed-loop control system that ensures manufacturing precision.
2Manufacturing precision
If solution concentration is not monitored, then the manufacturing process is fast and simple, but thickness variations and non-uniform light generation occur
Solution Approach 1:
The patent replaces manual concentration monitoring and adjustment with an automated optical measurement system. The spectrometer uses light absorption principles to non-contact, non-destructively measure solution concentration, eliminating the need for manual sampling and laboratory analysis, thereby maintaining high manufacturing efficiency while achieving precise control.
Solution Approach 2:
The system performs self-monitoring and self-adjustment of solution concentration during the spraying process. The spectrometer continuously measures the solution properties, and the controller automatically adjusts spraying parameters without requiring external intervention, enabling the manufacturing process to maintain both precision and productivity autonomously.
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 precise control of solution concentration and uniform thickness of organic emission layers, enhancing the consistency and efficiency of light generation in OLED displays.
Implementation Method 1
the emission-inducing unit provides energy to the solution flowing through the pipe to induce the generation of a light from the solution
Implementation Method 2
the spectrometer measures the wavelength and intensity of the light generated from the solution
Data Source
AI summary
A solution-providing apparatus and method of manufacturing organic light-emitting diode (OLED) display using the apparatus are disclosed. In one aspect, the apparatus comprises a storage unit, a spraying unit, a pipe, an emission-inducing unit, and a spectrometer. The storage unit is configured to store the solution that includes a light emissive material. The spraying unit is configured to spray the solution toward the substrate. The pipe interconnects the storage unit and the spraying unit. The emission-inducing unit is configured to excite the light emissive material of the solution that flows through the pipe so as to emit light from the solution. The spectrometer is configured to measure the wavelength and intensity of the light.