Display Device Light Transmission Layer Plasma Treatment
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Solution Overview
Problem
Existing display devices struggle to effectively control the viewing angle, which can lead to limited visibility and increased image reflection.
Innovation Solution
A display device is designed with a substrate having a light emitting area and a non-light emitting area, featuring a light emitting element, a light transmission layer with plasma-treated surface parts, and light control patterns disposed in openings of the light transmission layer. The light control patterns have a trapezoidal shape in cross-section, with a width that decreases as the distance from the light emitting element increases.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional display devices are used, then the structure is simple, but the viewing angle control is ineffective leading to limited visibility and increased image reflection
Solution Approach 1:
The light transmission layer is divided into multiple openings that are spaced apart from each other, creating a segmented structure. This segmentation allows different regions to control light transmission independently, effectively reducing image reflection while maintaining visibility from various angles.
Solution Approach 2:
The plasma-treated surface part is applied locally to specific regions of the light transmission layer rather than uniformly across the entire surface. This local treatment creates areas with enhanced light transmission properties where needed, effectively controlling viewing angle and reducing reflection without affecting the entire display structure.
2Ease of manufacture
If conventional light transmission layers are used, then the manufacturing process is simple, but light efficiency is reduced
Solution Approach 1:
The plasma treatment is applied to the light transmission layer before the final assembly is completed. This preliminary action modifies the surface properties of the light transmission layer to enhance light transmission efficiency, ensuring optimal performance is achieved before the device is finalized.
Solution Approach 2:
The plasma treatment changes the physical and chemical parameters of the light transmission layer surface, such as surface energy and roughness. These parameter changes improve light transmission efficiency by reducing scattering and absorption losses, thereby reducing energy loss while maintaining manufacturing feasibility.
3Ease of manufacture
If the light transmission layer has uniform structure, then the manufacturing is easier, but the viewing angle control is limited
Solution Approach 1:
The light transmission layer incorporates asymmetric features through the plasma-treated surface part and the specific arrangement of openings. The trapezoidal shape of light control patterns creates asymmetric light transmission properties that enable effective viewing angle control, allowing the display to perform well from various angles while maintaining reasonable manufacturing 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
The display device achieves enhanced light efficiency and improved control over the viewing angle, reducing image reflection and increasing visibility from various angles.
Implementation Method 1
A plasma-treated surface part is formed by plasma treating a surface of the organic layer
Implementation Method 2
The plasma treating the surface of the organic layer may be performed through an ion implantation process
Data Source
AI summary
A display device includes a substrate having a light emitting area and a non-light emitting area. A light emitting element us disposed in the light emitting area on the substrate. A light transmission layer is disposed on the light emitting element. The light transmission layer includes a plurality of openings spaced apart from each other. The light transmission layer includes a plasma-treated surface part. A plurality of light control patterns is disposed in the plurality of openings.