Display Edge Step Compensation for Color Conversion Layer Alignment
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Solution Overview
Problem
Current display devices face challenges in achieving improved reliability and efficiency in their manufacturing processes, particularly in the integration of light emitting elements and color conversion layers, which affect the overall performance and durability of the display.
Innovation Solution
The proposed solution involves a display device design that includes a substrate with a display area and a non-display area, featuring a light emitting element, a color conversion layer, and step difference compensation patterns made of the same material as the color filter layer, along with specific structural elements like bank patterns and insulating layers to enhance light emission and color reproducibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If step difference compensation patterns are added to the non-display area, then manufacturing precision is improved, but device complexity increases
Solution Approach 1:
The first and second step difference compensation patterns are formed in advance in the non-display area before the color conversion layer is applied. This preliminary action prevents step differences from affecting the final display quality and eliminates the need for post-processing corrections, thereby improving manufacturing precision without significantly increasing operational complexity
Solution Approach 2:
The step difference compensation patterns act as intermediary structures between the non-display area and the display area. These patterns provide a gradual transition in height, mediating the step difference that would otherwise directly impact the color conversion layer and display quality
2Manufacturing precision
If multiple layers including color filter layer and step difference compensation pattern are stacked, then manufacturing precision is improved, but ease of manufacture decreases
Solution Approach 1:
The step difference compensation patterns are formed using the same material as the color filter layer. This homogeneity in material composition allows both layers to be processed using the same fabrication techniques and conditions, simplifying the overall manufacturing process while maintaining precise layer alignment
Solution Approach 2:
The formation of the color filter layer and the step difference compensation patterns are combined into an integrated fabrication process. By using the same material and processing steps for both layers, the patent reduces the number of separate manufacturing operations required
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 design improves the reliability and efficiency of the display device by optimizing the light emission and color conversion processes, leading to enhanced performance and durability.
Implementation Method 1
a color conversion layer located on the light emitting element
Data Source
AI summary
A display device including: a substrate including a display area including a pixel area, and a non-display area at at least one side of the display area; a pixel in the pixel area, and including a light emitting element, a color conversion layer located on the light emitting element, and a color filter layer located on the color conversion layer; a first step difference compensation pattern in the non-display area, and around the display area; and a second step difference compensation pattern in the non-display area, and including a first end adjacent to the display area, and a second end opposite to the first end and located adjacent to an edge of the substrate, wherein the second step difference compensation pattern is located on the first step difference compensation pattern and overlaps the first step difference compensation pattern, and covers one end of the first step difference compensation pattern.