Color Converting Substrate Layout for Pixel Color Separation
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Solution Overview
Problem
Existing display devices face issues with color mixing due to the lack of effective color conversion and mixing prevention mechanisms, leading to reduced color accuracy and quality.
Innovation Solution
A color converting substrate with specific arrangements of light transmission and blocking areas, combined with wavelength converting patterns, is designed to prevent color mixing by strategically positioning first and second wavelength converting patterns and a light transmission pattern in alternating areas, accompanied by light blocking members to maintain color separation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If wavelength converting patterns are positioned close together to improve display resolution, then color mixing occurs between adjacent pixels, but color accuracy deteriorates
Solution Approach 1:
The patent introduces light blocking members as intermediary elements positioned between adjacent wavelength converting patterns. These members act as barriers that prevent light from one pixel from leaking into adjacent pixels, thereby eliminating color mixing while allowing the wavelength converting patterns to remain closely positioned for high resolution display
Solution Approach 2:
The patent divides the display structure into distinct segments by introducing light blocking members that physically separate adjacent wavelength converting patterns. This segmentation creates isolated optical zones for each pixel, preventing color mixing while maintaining high pixel density for improved display resolution
2Object-generated harmful factors
If light blocking members are made taller to improve color mixing prevention, then color separation improves, but structural stability deteriorates due to sagging or inclination
Solution Approach 1:
The patent applies different properties to different parts of the light blocking member structure. The lower portion has a first refractive index while the upper portion has a second refractive index, creating local quality variations that provide both mechanical support and optical functionality. This allows the structure to maintain stability while achieving effective color separation
Solution Approach 2:
The light blocking member is constructed as a composite structure with portions having different refractive indices. This composite design provides both mechanical strength for structural stability and optical properties for effective light blocking, resolving the contradiction between height requirements for color separation and structural stability
3Illumination intensity
If wavelength converting patterns are positioned in light transmission areas to improve light utilization, then luminance improves, but color mixing increases
Solution Approach 1:
The light blocking members serve as intermediaries that allow wavelength converting patterns to be positioned in light transmission areas for high luminance while preventing the converted light from mixing with adjacent pixels. The mediators enable both high light utilization and color isolation simultaneously
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 effectively prevents sagging or inclination of light blocking members, thereby preventing color mixing and enhancing color accuracy and quality in display devices.
Implementation Method 1
a first wavelength converting pattern positioned on the base portion and configured to wavelength-convert light of a first color into light of a second color
Implementation Method 2
a second wavelength converting pattern positioned on the base portion and configured to wavelength-convert the light of the first color into light of a third color
Implementation Method 3
a light transmission pattern positioned on the base portion and configured to transmit the light of the first color therethrough
Data Source
AI summary
Provided are a color converting substrate and a display device including same. The color converting substrate includes: a base portion in which a first light transmission area, a first light blocking area, and a second light transmission area, which are sequentially and closely arranged in a first direction, are defined; a first wavelength converting pattern located on the base portion and configured to wavelength-covert a first color light into a second color light; a second wavelength converting pattern located on the base portion and configured to wavelength-convert the first color light into a third color light; and a light transmission pattern located on the base portion and configured to transmit the first color light.