Wavelength Conversion Patterns for High-Resolution Displays
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Solution Overview
Problem
Current display devices face challenges in achieving high resolution and efficient color representation due to limitations in wavelength conversion patterns and manufacturing methods, which affect the quality and density of pixel arrangements.
Innovation Solution
A display device design incorporating a wavelength conversion pattern with specific emission and non-emission areas, including a base member, light emitting elements, and a method for manufacturing that involves forming sacrificial patterns, insulating layers, and inkjet deposition of wavelength shifters to create high-resolution pixel structures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a wavelength conversion pattern is disposed on the optical path from a light source to a viewer to enable each pixel to display a primary color, then color representation capability is improved, but manufacturing precision and resolution are limited due to conventional manufacturing methods
Solution Approach 1:
The display device is divided into multiple emission areas (first emission area, second emission area) separated by non-emission areas. Each emission area contains specific light emitting elements and wavelength conversion patterns, allowing independent optimization of color representation in different regions while maintaining overall manufacturing precision through standardized segmentation patterns.
Solution Approach 2:
Different regions of the display device are assigned different functional characteristics: the first emission area contains first light emitting elements with first wavelength conversion patterns, while the second emission area contains second light emitting elements with second wavelength conversion patterns. This local differentiation enables optimized color representation for different pixels while using conventional manufacturing processes for each region.
2Ease of manufacture
If conventional manufacturing methods are used to form wavelength conversion patterns, then manufacturing process simplicity is maintained, but resolution and pixel density are insufficient
Solution Approach 1:
The manufacturing process begins with forming a base member that includes pre-defined first emission areas, second emission areas, and non-emission areas. The light emitting elements and wavelength conversion patterns are then formed in these pre-established regions, allowing conventional manufacturing techniques to achieve high pixel density and resolution by following the predetermined structural framework.
3Manufacturing precision
If light emitting elements and wavelength conversion patterns are arranged to maximize pixel density, then resolution is improved, but device complexity increases due to precise positioning requirements
Solution Approach 1:
The base member is designed with uniform structural characteristics across different emission areas, creating an equipotential manufacturing environment. The first emission areas and second emission areas are arranged in a repeating pattern with identical structural relationships to the non-emission areas, allowing conventional manufacturing processes to achieve high pixel density without requiring complex positioning adjustments for different 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 enables the creation of high-resolution display devices with improved color accuracy and pixel density by precisely arranging wavelength conversion patterns and light emitting elements, enhancing the display's color representation capabilities.
Implementation Method 1
the first wavelength conversion pattern may include a first wavelength shifter converting light of the first color into light of the second color
Data Source
AI summary
A display device includes a first emission area, a second emission area disposed adjacent to the first emission area, and a non-emission area, a base member disposed in the first emission area, the second emission area, and the non-emission area, a light emitting element part disposed and including a first light emitting element disposed in the first emission area and a second light emitting element disposed in the second emission area, a wavelength conversion part disposed on the light emitting element part and including a first wavelength conversion pattern, a first insulating layer covering the first wavelength conversion pattern, opened at a portion disposed adjacent to the first emission area, exposing a portion of the first wavelength conversion pattern, and a light blocking member disposed in the non-emission area and covering the portion of the first wavelength conversion pattern. The wavelength conversion part is disposed in the second emission area.