Viewing-Angle Display Structure With Uniform Transmittance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Display devices face challenges in maintaining uniform transmittance and reliability due to variations in viewing angles, particularly when requiring a narrow viewing angle for specific positional recognition, which existing technologies struggle to address effectively.
Innovation Solution
A display device design featuring light control patterns with alternately stacked light blocking and organic patterns, including a substrate with light emitting diodes, and an organic film between adjacent light control patterns, ensures consistent light passage and uniform transmittance by using materials like molybdenum-tantalum oxide and black pigments, and employing a photoresist pattern for precise patterning of these layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If light control patterns are implemented to adjust viewing angle, then viewing angle control is improved, but transmittance uniformity deteriorates
Solution Approach 1:
The light control pattern is segmented into multiple alternating layers (first light blocking layer, first organic layer, second light blocking layer, second organic layer, third light blocking layer) with different transmittance characteristics. This segmentation allows each layer to contribute differently to light control, achieving both viewing angle adjustment and transmittance uniformity through the composite structure.
Solution Approach 2:
The patent uses composite material structure combining light blocking materials (with low transmittance) and organic materials (with high transmittance) in alternating layers. This composite approach enables the light control pattern to simultaneously achieve viewing angle restriction and uniform transmittance by balancing the optical properties of different materials.
2Manufacturing precision
If multiple alternating layers are used to maintain uniform transmittance, then transmittance uniformity is improved, but device complexity increases
Solution Approach 1:
The alternating light blocking and organic layers serve multiple functions simultaneously: they control viewing angles through their alternating transmittance properties, maintain uniform overall transmittance through the composite structure, and provide mechanical support. This multi-functionality reduces the need for additional separate components, thereby managing complexity.
3Manufacturing precision
If photoresist pattern is used for precise patterning, then manufacturing precision is improved, but process time increases
Solution Approach 1:
The photoresist pattern is formed in advance before the sequential patterning of multiple layers. This preliminary action allows the photoresist to serve as a master mask that guides the patterning of all subsequent layers (light blocking layers and organic layers), ensuring precision while avoiding the need to apply separate photoresist for each layer.
Data Source
AI summary
A display device includes a substrate, a light emitting diode disposed on the substrate and light control patterns overlapping the light emitting diode, the light control patterns including at least three light blocking patterns and at least two organic patterns alternately disposed on the light emitting diode and spaced apart from each other.