Color Conversion Substrate Layout for External Light Reflection Control
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Solution Overview
Problem
Existing display devices, particularly OLEDs, face challenges in achieving improved display quality through effective color conversion patterns or wavelength conversion patterns for each pixel on the light path from a light source to a viewer.
Innovation Solution
A color conversion substrate is designed with a base portion that includes defined light-blocking and light-transmitting areas, where color filters and wavelength conversion patterns are strategically disposed to convert light of one color into light of another, thereby enhancing display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If color conversion patterns or wavelength conversion patterns are arranged for each pixel on the light path, then each pixel can uniquely represent one basic color, but display quality is insufficient due to color distortion from external light reflection
Solution Approach 1:
The pixel structure is segmented into multiple functional layers: color conversion pattern, color filter pattern, and light-blocking member. This segmentation allows each component to address specific optical issues independently, with the light-blocking member specifically targeting external light reflection problems while the color conversion and filter patterns handle color accuracy.
Solution Approach 2:
The light-blocking member acts as an intermediary element positioned between the external environment and the color conversion components. It mediates the interaction by blocking harmful external light reflections before they can reach the color conversion patterns, thereby preventing color distortion without interfering with the desired light path from the OLED.
2Productivity
If multiple color filters and wavelength conversion patterns are disposed sequentially, then color conversion efficiency is improved, but device structure becomes more complex
Solution Approach 1:
The patent combines multiple color conversion mechanisms into a single integrated substrate structure. The color conversion pattern, color filter pattern, and light-blocking member are merged into one cohesive assembly that performs multiple functions simultaneously, reducing the need for separate components and simplifying the overall device architecture.
Solution Approach 2:
The color conversion substrate is designed as a multi-functional component that simultaneously performs color conversion, color filtering, and light blocking functions. This universal design allows a single substrate to replace what would otherwise require multiple separate components, thereby improving color conversion efficiency without proportionally increasing device complexity.
3Reliability
If light-blocking members are disposed in contact with the base portion, then light blocking effectiveness is improved, but manufacturing alignment precision requirements increase
Solution Approach 1:
The light-blocking member is designed to extend to and contact the base portion in advance, creating a preliminary barrier that ensures complete light blocking before light can reach other components. This preliminary action guarantees light blocking effectiveness while the extended structure provides inherent alignment tolerance, reducing the stringency of manufacturing alignment requirements.
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 display quality by effectively converting light colors and reducing color distortion due to external light reflection, resulting in enhanced luminance, contrast, and color gamut.
Implementation Method 1
a first wavelength conversion pattern disposed on the second color filter and which wavelength-converts light of a first color into light of a second color
Implementation Method 2
a second wavelength conversion pattern disposed on the third color filter and which wavelength-converts the light of the first color into light of a third color
Implementation Method 3
the first color filter may transmit the light of the first color and block the light of the second color and the light of the third color
Data Source
AI summary
A color transformation substrate comprises: a base portion having first and second light-blocking areas and first to third light-transmitting areas, where the light-transmitting areas are successively positioned along a first direction; first to third color filters positioned in the first to third light-transmitting areas, respectively; a light-blocking member positioned in the first light-blocking area, and including part contacting the base portion; a color pattern positioned in the second light-blocking area so as to contact the base portion; a first wavelength conversion pattern positioned on the second color filter so as to wavelength-convert light having a first color into light having a second color; and a second wavelength conversion pattern positioned on the third color filter so as to wavelength-convert light having the first color into light having a third color different from light having the second color. The color pattern and the first color filter comprise the same color material.