Color Conversion Substrate with Segmented Low Refractive Patterns
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Solution Overview
Problem
Current display devices with color conversion substrates face challenges in achieving improved light efficiency and reliability due to limitations in the design and materials used for the color conversion layer, which affect the overall display quality and durability.
Innovation Solution
A color conversion substrate is designed with a partition layer, reflective layer, color filter patterns, low refractive patterns, and color conversion patterns, where the low refractive patterns are spaced apart to prevent oxygen, moisture, and foreign substance penetration, and a reflective layer is used to enhance light efficiency by being strategically positioned around the light emitting areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the color conversion layer uses wavelength conversion particles to convert light wavelength, then the display quality is improved, but the light efficiency deteriorates due to material limitations and design constraints
Solution Approach 1:
The patent applies local quality by creating pixel openings with specific depths in the partition layer, positioning color filter patterns, low refractive patterns, and color conversion patterns at different locations within the pixel openings. This localized structural arrangement optimizes light conversion efficiency in specific regions while maintaining overall display quality.
Solution Approach 2:
The patent introduces depth as an additional dimension by varying the depth of pixel openings in the partition layer. This dimensional change allows for optimized light path control and enhanced interaction between light and color conversion materials, improving both display quality and light efficiency simultaneously.
2Loss of energy
If continuous low refractive patterns are used to fill pixel openings, then light efficiency is improved, but reliability deteriorates due to penetration of oxygen, moisture, and foreign substances
Solution Approach 1:
The patent segments the low refractive patterns into discrete, spaced-apart structures rather than continuous fillers. This segmentation maintains the optical benefits of low refractive index materials for light efficiency while creating gaps that prevent penetration of oxygen, moisture, and foreign substances, thereby ensuring reliability.
Solution Approach 2:
The spaced-apart low refractive patterns act as intermediary structures that mediate between the need for light efficiency (requiring material presence) and reliability (requiring barrier properties). The spacing between patterns allows them to fulfill optical functions while preventing harmful substance penetration.
3Loss of energy
If the pixel openings are made deeper to improve light conversion, then light efficiency is improved, but manufacturing precision deteriorates due to difficulty in controlling depth uniformity
Solution Approach 1:
The patent employs partial action by optimizing pixel opening depths to a specific range that provides sufficient light conversion efficiency without excessive depth. This controlled depth ensures manufacturability and precision while achieving the necessary optical performance, avoiding the pitfalls of overly deep openings that would be difficult to manufacture uniformly.
4Illumination intensity
If more materials are used to enhance light conversion, then display quality is improved, but device complexity increases
Solution Approach 1:
The patent merges multiple functions into integrated patterns: color filter patterns and color conversion patterns are positioned within the same pixel openings, and low refractive patterns are combined with the partition layer structure. This merging reduces the number of separate components and simplifies the overall device structure while maintaining enhanced light conversion and display quality.
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 light efficiency and reliability by controlling the depth of pixel openings, reducing material usage, and preventing penetration through the low refractive patterns, while the reflective layer improves light emission and prevents color mixing between adjacent light emitting areas.
Implementation Method 1
the low refractive patterns are spaced apart to prevent oxygen, moisture, and foreign substance penetration
Implementation Method 2
a reflective layer is used to enhance light efficiency by being strategically positioned around the light emitting areas
Implementation Method 3
The color conversion layer may convert a wavelength of light provided from the display substrate. For example, the color conversion layer may include wavelength conversion particles, such as quantum dots
Data Source
AI summary
A color conversion substrate includes: a substrate including light emitting areas, and a peripheral area surrounding the light emitting areas; a partition layer on the substrate, and having a plurality of pixel openings defined in the light emitting areas, respectively, and a sub-opening defined in the peripheral area and around the pixel openings; color filter patterns in the pixel openings, respectively; low refractive patterns in the pixel openings, and on the color filter patterns, respectively; and color conversion patterns in the pixel openings, and on the low refractive patterns, respectively.