Light Control Layer Sidewall Structure for High-Resolution Flexible Displays
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Solution Overview
Problem
Existing display devices face challenges in achieving high resolution while minimizing the number of optical functional layers, particularly in thin and flexible display designs such as curved, rollable, or foldable displays.
Innovation Solution
A display device is designed with a light control layer that includes light control patterns and a division pattern with inclined side walls, allowing for a fine inkjet process to form the light control layer, which enhances resolution and flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If the number of optical functional layers is reduced to achieve thin display devices, then device thickness is decreased, but manufacturing precision becomes more difficult to maintain
Solution Approach 1:
The division pattern is segmented into multiple side walls (first side walls and second side walls) with different orientations and spacing. This segmentation allows each side wall to be independently optimized for inkjet deposition control, enabling precise light control pattern formation even with reduced layer thickness.
Solution Approach 2:
Different side walls are designed with different local properties: first side walls extend in a first direction with specific spacing, while second side walls extend in a second direction with greater spacing. This local differentiation optimizes the inkjet process for forming light control patterns at different locations within the same structure.
2Manufacturing precision
If high resolution is achieved through fine inkjet processes, then light control pattern precision is improved, but device complexity increases
Solution Approach 1:
The division pattern employs asymmetric design where second side walls are spaced farther apart than first side walls. This asymmetric configuration simplifies the inkjet deposition process by creating larger access channels in certain directions, reducing the complexity of forming high-resolution light control patterns.
Solution Approach 2:
The division pattern utilizes two-dimensional arrangement of side walls extending in different directions (first direction and second direction). This dimensional approach allows the inkjet process to deposit material along multiple pathways, achieving high-resolution light control patterns without requiring overly complex single-direction structures.
3Adaptability or versatility
If flexible display designs are implemented, then adaptability is improved, but manufacturing precision deteriorates
Solution Approach 1:
The division pattern with its predefined side wall structure is formed beforehand to guide the inkjet deposition process. This preliminary structural framework ensures that light control patterns are formed with high precision on flexible substrates, compensating for the challenges of manufacturing on non-rigid surfaces.
Data Source
AI summary
A display device includes a light control layer including a plurality of light control patterns and a division pattern that divides the plurality of light control patterns. The division pattern includes a plurality of side walls that define the openings. The plurality of side walls includes first side walls and second side walls. The first side walls include a first inclined surface inclined in a direction away from a corresponding light control pattern among the plurality of light control patterns.