Wavelength Conversion Pixel Layout to Prevent Display Color Mixing
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Solution Overview
Problem
Display devices face challenges in achieving improved display quality and light efficiency due to color mixing issues between adjacent pixel areas, which affect the overall brightness and color accuracy.
Innovation Solution
The display device incorporates a base layer with wavelength conversion parts, partition walls, and a cover part, where the partition walls have a lower refractive index than the cover part, preventing color mixing by total internal reflection and maintaining uniform distance between the image display part and the base layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If wavelength conversion parts are disposed close to each other to increase aperture ratio, then productivity and area utilization are improved, but color mixing occurs between adjacent pixel areas reducing display quality
Solution Approach 1:
The invention introduces partition walls that divide the space between adjacent wavelength conversion parts, effectively segmenting the optical path. This segmentation prevents light from one pixel area from reaching adjacent wavelength conversion parts, thereby preventing color mixing while maintaining high aperture ratio.
Solution Approach 2:
The partition wall acts as an intermediary structure between adjacent wavelength conversion parts. By positioning the partition wall between the wavelength conversion parts and utilizing its lower refractive index, the invention mediates the optical interaction between adjacent pixels to prevent harmful light crossover while maintaining structural integrity.
2Manufacturing precision
If partition walls are introduced to prevent color mixing, then display quality is improved, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The invention utilizes parameter changes in refractive index by selecting materials with specific optical properties. The partition wall is made of material with lower refractive index than the cover part, creating total internal reflection conditions that prevent color mixing. This parameter-based approach achieves the desired optical separation without complex mechanical structures.
Solution Approach 2:
The partition wall is strategically positioned only where needed - between adjacent wavelength conversion parts - rather than throughout the entire device. This localized approach provides the necessary optical separation precisely where color mixing occurs, while minimizing overall structural complexity and material usage.
3Loss of energy
If partition walls with lower refractive index than cover part are used to achieve total internal reflection, then light efficiency is improved, but material selection and manufacturing precision requirements increase
Solution Approach 1:
The invention exploits the parameter of refractive index by selecting materials where the partition wall has lower refractive index than the cover part. This parameter difference creates the conditions for total internal reflection at the interface, efficiently redirecting light that would otherwise be lost, thereby improving light efficiency while managing material selection 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
This configuration enhances display quality by preventing color mixing and increasing the aperture ratio, while also improving light efficiency by minimizing light loss through total internal reflection.
Implementation Method 1
the partition walls have a lower refractive index than the cover part, preventing color mixing by total internal reflection
Data Source
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AI summary
Provided is a display device (DD). The display device includes a base layer (BS), a plurality of wavelength conversion parts (CCF1, CCF2, CCF3) disposed on one surface of the base layer, a partition wall (BR) disposed between the adjacent wavelength conversion parts of the plurality of wavelength conversion parts and having a first refractive index, a cover part (CP) configured to cover the plurality of wavelength conversion parts and having a second refractive index greater than the first refractive index, and an image display part (IDP) disposed on a surface provided by the partition wall (BR) and the cover part (CP).