Display Device Light Emitting Element Alignment via Refractive Index Layers
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Solution Overview
Problem
Current display device manufacturing processes face challenges in aligning light emitting elements efficiently, leading to defects and increased complexity, which hinders the improvement of alignment quality and simplifies the manufacturing process.
Innovation Solution
A display device design that includes a substrate with pixel areas and non-display areas, featuring a configuration of electrodes, bank patterns, and intermediate layers with different refractive indices, allowing for precise alignment of light emitting elements using conductive lines within the pixel circuit, thereby simplifying the alignment process and reducing defects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional alignment methods are used for light emitting elements, then the manufacturing process becomes complex and time-consuming, but the alignment precision is insufficient
Solution Approach 1:
The patent introduces intermediate layers with different refractive indices as mediators between the bank pattern and light emitting elements. These intermediate layers create optical contrast that enables precise alignment without complex mechanical positioning systems, thus improving alignment precision while avoiding manufacturing process complexity
Solution Approach 2:
The patent replaces mechanical alignment methods with optical alignment methods. By using intermediate layers with different refractive indices, the system uses optical field effects rather than mechanical positioning to achieve precise alignment of light emitting elements, simplifying the manufacturing process while maintaining high precision
2Manufacturing precision
If conventional alignment methods are used for light emitting elements, then the manufacturing process takes more time, but the alignment quality does not improve
Solution Approach 1:
The intermediate layers with different refractive indices enable the light emitting elements to self-align through optical field effects. The elements automatically position themselves in the desired locations based on optical contrast, eliminating the need for time-consuming manual or mechanical alignment procedures while achieving high alignment quality
Solution Approach 2:
The patent replaces time-consuming mechanical alignment procedures with rapid optical alignment. The optical field effects created by intermediate layers with different refractive indices enable quick and accurate positioning of light emitting elements, significantly reducing manufacturing time while improving alignment quality
3Reliability
If light emitting elements are not properly aligned, then manufacturing defects increase, but the alignment process becomes more difficult
Solution Approach 1:
The intermediate layers act as mediators that provide clear optical signals for alignment. By creating refractive index differences, these layers make misalignment immediately visible and correctable, reducing manufacturing defects without requiring complex alignment monitoring systems
Solution Approach 2:
The intermediate layers with different refractive indices create optical contrast that appears as visual differences during alignment. This optical signaling mechanism allows operators to easily identify alignment status and make corrections, reducing defects while keeping the alignment process simple
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 proposed solution enhances the alignment degree of light emitting elements, simplifies the manufacturing process, and improves the efficiency of light emission by aligning elements in a desired area using electric fields formed between electrodes, resulting in improved light output and reduced manufacturing complexity.
Implementation Method 1
aligning elements in a desired area using electric fields formed between electrodes
Data Source
AI summary
A display device may include a substrate including pixel areas, and a pixel disposed in each of the pixel area. The pixel may include a transistor and a driving voltage line disposed in the substrate, first and second electrodes spaced apart from each other, a bank pattern disposed on the first and second electrodes, respectively, intermediate layers disposed on the bank pattern, light emitting elements disposed between two adjacent intermediate layers of the intermediate layers, a first contact electrode disposed on one of the two adjacent intermediate layers and electrically connected to an end of each of the light emitting elements, and a second contact electrode disposed on another one of the two adjacent intermediate layers and electrically connected to another end of each of the light emitting elements.