OLED Color Conversion Layout With Shared Light Transmission Spacer
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Solution Overview
Problem
Current display devices face challenges in achieving high display quality and efficient manufacturing processes while reducing manufacturing costs, particularly in the integration of color conversion layers and light transmission patterns in organic light emitting diode (OLED) devices.
Innovation Solution
A display device design incorporating a first substrate with light emitting areas, light blocking areas, and specific patterns such as color conversion patterns, light transmission patterns, and column spacers, where the light transmission pattern and column spacer include scattering particles, and a method of manufacturing involving inkjet printing and exposure processes to form these patterns simultaneously, reducing material usage and processing steps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If color conversion layers are added to OLED displays to achieve different colors, then display quality is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent combines the column spacer and light transmission pattern into a single structural element made from the same material composition. This merging reduces the number of separate components and simplifies the manufacturing process while maintaining the color conversion functionality through integrated light management structures.
Solution Approach 2:
The light transmission pattern serves multiple functions: it acts as both a structural support element and a light management component that enables color conversion. By making the column spacer and light transmission pattern from the same material, the structure performs both mechanical support and optical functions simultaneously, reducing overall device complexity.
2Illumination intensity
If multiple color conversion patterns are implemented, then display quality is improved, but manufacturing process complexity increases
Solution Approach 1:
The patent forms the column spacer and light transmission pattern in a single manufacturing step using the same material composition. This combined formation approach simplifies the manufacturing process by reducing the number of deposition or fabrication steps required, while still enabling multiple color conversion patterns to be implemented across different regions.
Solution Approach 2:
The light transmission pattern is selectively formed in specific regions (third opening) while color conversion patterns are formed in other regions (first and second openings). This local differentiation allows multiple color conversion patterns to be implemented across the display while maintaining manufacturing efficiency through a unified material system.
3Use of energy by moving object
If scattering particles are incorporated into the light transmission pattern and column spacer, then light conversion rate is improved, but material complexity increases
Solution Approach 1:
The patent uses composite materials containing scattering particles incorporated into the column spacer and light transmission pattern. This composite material approach enhances light conversion rates by utilizing the scattering properties of the particles while maintaining a unified material system that simplifies the overall structure rather than increasing complexity.
Solution Approach 2:
The scattering particles modify the optical parameters of the light transmission pattern and column spacer, enhancing light conversion efficiency. By incorporating these particles into the existing material structure rather than adding separate components, the patent improves light conversion while avoiding additional structural 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 approach enhances light conversion rates, improves display quality, and streamlines the manufacturing process by reducing material waste and costs through the simultaneous formation of light transmission patterns, column spacers, and compensation patterns.
Implementation Method 1
a first color conversion pattern disposed in the first opening, where the first color conversion pattern converts a light of a first wavelength into a light of a second wavelength, a second color conversion pattern disposed in the second opening, where the second color conversion pattern converts the light of the first wavelength into a light of a third wavelength
Implementation Method 2
each of the light transmission pattern and the column spacer may include a scattering particle
Data Source
AI summary
A display device includes a first substrate including first to third light emitting areas, and a light blocking area surrounding first to third light emitting area, light emitting elements disposed on the first to third light emitting areas of a first substrate, a bank disposed on light emitting elements, where first to third openings exposing light emitting elements are defined in the bank, a first color conversion pattern disposed in the first opening to convert a light of a first wavelength into a light of a second wavelength, a second color conversion pattern disposed in the second opening to convert the light of the first wavelength into a light of a third wavelength, a light transmission pattern disposed in the third opening to transmit the light of the first wavelength, and a column spacer disposed on the bank and having a same composition as the light transmission pattern.