Optical Device Hollow Members Reduce Surface Diffraction
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Solution Overview
Problem
Optical devices with wave guide color filter (WGCF)-type structures experience ghost image and petal flare due to surface diffraction issues, which existing technologies have not effectively addressed.
Innovation Solution
The optical device incorporates a substrate with central and peripheral color filters and corresponding hollow members, featuring continuous wall structures with high refractive index and low-refractive-index material layers, forming complex periodic structures that reduce surface diffraction and enhance light energy trapping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a wave guide color filter (WGCF)-type structure with low-refractive-index material layer is used instead of microlens, then the device can eliminate the need for microlens above color filters, but ghost image and petal flare appear due to surface diffraction
Solution Approach 1:
The patent changes the refractive index parameter by introducing hollow members with air cores (refractive index ≈1.0) surrounded by high-refractive-index material layers. This parameter change creates strong refractive index contrast that forms effective microlens-like focusing structures, eliminating ghost image and petal flare while maintaining the WGCF-type structure's advantage of not requiring traditional microlenses above color filters.
Solution Approach 2:
The patent uses composite material structures where hollow members consist of multiple layers including high-refractive-index material layers and low-refractive-index material layers. This composite structure creates the necessary refractive index contrast to control surface diffraction and eliminate harmful optical effects while maintaining structural integration with the color filters.
2Object-affected harmful factors
If hollow members with continuous wall structures are introduced to reduce surface diffraction, then ghost image and petal flare are eliminated, but the device structure becomes more complex
Solution Approach 1:
The hollow members are nested within or integrated with the color filter structures, with high-refractive-index material layers surrounding air cores. This nested configuration allows the hollow members to be embedded within the existing WGCF-type structure, adding diffraction control functionality without requiring separate external components, thus limiting the increase in overall device complexity.
Solution Approach 2:
The hollow members serve multiple functions: they act as diffraction control elements to eliminate ghost image and petal flare, while also integrating with the color filter structure to maintain the WGCF-type configuration. This multi-functionality reduces the need for additional separate components, thereby limiting structural complexity increase.
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 effectively eliminates ghost images and petal flare while improving the quantum efficiency (QE) spectrum by reducing surface diffraction and increasing light energy trapping within the optical device.
Implementation Method 1
unexpected ghost image and petal flare appear on a display panel due to worse surface diffraction
Implementation Method 2
enhance light energy trapping
Data Source
AI summary
An optical device is provided. The optical device includes a substrate, a central color filter, a first color filter and a second color filter sequentially disposed on the substrate from the center to the edge of the substrate, and a central hollow member, a first hollow member and a second hollow member respectively disposed on the central color filter, the first color filter and the second color filter. There is no distance between a center of the central color filter and a center of the central hollow member. There is a first distance between a center of the first color filter and a center of the first hollow member. There is a second distance between a center of the second color filter and a center of the second hollow member. The first distance is greater than zero. The second distance is greater than the first distance.