Display Bank Scatterer Structure for NIR Alignment Key Recognition
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing display devices face challenges in achieving improved light output efficiency and display quality, as well as in properly recognizing the alignment key structure during manufacturing processes.
Innovation Solution
A display device design that includes a base layer, a display layer with light emitting elements, a conductive pattern layer acting as an alignment key, and a bank structure with first and second bank scatterers of different sizes, which enhances light transmittance in the near-infrared wavelength band and reflectance in the visible light range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the bank structure is designed to improve light output efficiency, then light transmittance in near-infrared band is improved, but light reflectance in visible range may be affected
Solution Approach 1:
The bank structure incorporates scatterers with specific size distributions (first scatterers: 200-300 nm, second scatterers: 100-200 nm) to create localized optical properties that selectively transmit near-infrared light while maintaining visible light reflectance. This local quality differentiation resolves the contradiction by optimizing light interaction at specific spatial locations within the bank structure.
Solution Approach 2:
The bank structure uses a composite material system comprising multiple scatterer types (different sizes and materials such as TiOx, SiOx, ZrOx, AlxOy) embedded in a matrix material. This composite approach enables simultaneous optimization of near-infrared transmittance and visible light reflectance by leveraging the complementary optical properties of different scatterer components.
2Use of energy by moving object
If the bank structure is optimized for light transmittance, then near-infrared light transmission is improved, but manufacturing precision requirements may increase
Solution Approach 1:
The patent specifies precise parameter ranges for scatterer sizes (first scatterers: 200-300 nm, second scatterers: 100-200 nm) and their weight ratios (6-7% and 12-16% respectively) to achieve the desired near-infrared transmittance. By defining these parameter ranges, the invention balances optical performance with manufacturability, as precise control within these ranges can be achieved using conventional manufacturing techniques.
Solution Approach 2:
The bank structure incorporates scatterers at specific concentration levels (6-7% and 12-16% by weight) that provide sufficient light scattering for near-infrared transmittance optimization without excessive scatterer loading that would complicate manufacturing. This partial action approach achieves the optical goal while maintaining reasonable manufacturing precision requirements.
3Illumination intensity
If the bank thickness is increased to improve light scattering, then visible light reflectance is improved, but near-infrared light transmittance may decrease
Solution Approach 1:
The bank structure uses scatterers with specific size distributions localized within the bank thickness to create differentiated optical zones. The first scatterers (200-300 nm) and second scatterers (100-200 nm) are distributed to optimize local light scattering for visible reflectance while maintaining transparency for near-infrared transmission.
Solution Approach 2:
The composite scatterer system with multiple size ranges and material compositions enables the bank to simultaneously achieve visible light reflectance and near-infrared transmittance. The combination of different scatterer types creates a synergistic effect where each component contributes to different wavelength ranges, resolving the thickness-related contradiction.
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 improves light output efficiency and display quality by optimizing the bank structure's light transmittance and reflectance characteristics, enabling accurate recognition of the alignment key during manufacturing and facilitating a normal manufacturing process.
Implementation Method 1
the bank may include a first bank scatterer and a second bank scatterer, the second bank scatterer may have a size different from that of the first bank scatterer
Data Source
AI summary
A display device that includes a base layer, a display layer disposed on the base layer and including a light emitting element, a conductive pattern layer disposed on the display layer, and a bank disposed on the display layer, the bank protruding in a thickness direction of the base layer and surrounding at least a portion of an area. The bank covers the conductive pattern layer and includes a first bank scatterer and a second bank scatterer, the second bank scatterer having a size different from that of the first bank scatterer.