Partition Wall Structure for Flexible Display Phosphor Filling
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Solution Overview
Problem
Current display technologies, such as LCDs and AMOLEDs, face challenges like slow response time, short lifespan, and limited flexibility, while semiconductor light emitting devices struggle with mixed colors and size restrictions in high-definition displays. Additionally, existing partition wall structures for phosphor layers in flexible displays are not adequately developed.
Innovation Solution
A flexible display device using a semiconductor light emitting device with a novel partition wall structure that incorporates a light transmitting material for the partition wall, allowing for increased phosphor filling space and preventing mixed colors, enabling high-resolution displays with a pentile type structure and flexible material usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a partition wall structure is provided on the phosphor layer to prevent mixed colors, then color purity is improved, but the filling space of phosphor is reduced
Solution Approach 1:
A light transmitting material is introduced as an intermediary substance to fill the partition wall structure. This material allows light to pass through while maintaining the partition wall's function of preventing color mixing, thereby resolving the contradiction between color purity and light transmission efficiency
Solution Approach 2:
The partition wall structure is designed with different properties in different regions: the wall itself provides color separation (preventing mixing), while the light transmitting material within the wall allows light passage. This local differentiation of properties resolves the contradiction between preventing color mixing and maintaining phosphor filling space
2Measurement precision
If the size of semiconductor light emitting devices is reduced to implement high-definition display, then resolution is improved, but manufacturing precision requirements increase
Solution Approach 1:
The display is implemented using a pentile type structure where semiconductor light emitting devices are selectively arranged and sized differently for different colors (e.g., larger blue devices, smaller red and green devices). This segmentation approach allows high definition display while managing manufacturing precision requirements through standardized device sizes
3Adaptability or versatility
If flexible material is used for partition wall to enable flexible display, then flexibility is improved, but structural strength is reduced
Solution Approach 1:
The partition wall structure combines flexible materials with light transmitting properties. This composite approach maintains the flexibility needed for flexible displays while ensuring the partition wall retains sufficient strength to prevent color mixing between adjacent phosphor regions
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 solution enhances the filling space of phosphors, prevents color mixing, and allows for high-resolution displays at the same pixel size, particularly securing more area for green pixels, thereby improving display efficiency and flexibility.
Implementation Method 1
a phosphor layer disposed to cover the plurality of semiconductor light emitting devices
Data Source
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Figure 3a~3b
Figure 4~5b
AI summary
A display device include a substrate including a wiring electrode; an adhesive layer disposed on the substrate; a plurality of semiconductor light emitting devices adhered to the adhesive layer, and electrically connected to the wiring electrode; and a phosphor layer disposed to cover the plurality of semiconductor light emitting devices. Further, the phosphor layer includes a plurality of phosphor portions for converting a wavelength of light, and a plurality of partition wall portions formed between the plurality of phosphor portions, and the plurality of partition wall portions are sequentially disposed between the phosphor portions along a first direction and a second direction crossing each other, respectively, and at least one of the sequentially disposed partition wall portions overlaps with at least one of the plurality of semiconductor light emitting devices.