Silicon Partitioned Display Structure for High-Resolution Color Conversion
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Solution Overview
Problem
Current display devices, particularly head-mounted displays for virtual and augmented reality, face challenges in achieving ultra-high resolution and efficient light emission across various color spectrums due to limitations in wavelength conversion and substrate materials.
Innovation Solution
A display device design featuring a silicon-on-sapphire (SOS) substrate with partition walls and wavelength conversion layers, including color filters and quantum dot layers, to enhance light emission efficiency and resolution by converting blue light into white light and filtering specific wavelengths, thereby improving color reproduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a wavelength conversion layer is used to convert blue light to white light, then color reproduction is improved, but light emission efficiency deteriorates due to wavelength conversion losses
Solution Approach 1:
The wavelength conversion layer is segmented into multiple regions, each containing color filters with different spectral characteristics. This segmentation allows different portions of the blue light spectrum to be converted to different colors (red, green, blue) through selective absorption and re-emission, improving overall color reproduction while maintaining higher light emission efficiency by converting only specific wavelength ranges rather than the entire blue spectrum.
Solution Approach 2:
Different regions of the wavelength conversion layer are assigned different local qualities through the use of color filters with specific spectral transmission characteristics. Each local region converts blue light to a specific color range optimized for that portion of the display spectrum, allowing tailored wavelength conversion that improves color accuracy while minimizing energy loss in each local area.
2Measurement precision
If ultra-high resolution emission areas are formed, then display resolution is improved, but manufacturing precision requirements worsen
Solution Approach 1:
The display panel is divided into multiple emission areas, each corresponding to a specific pixel or sub-pixel region. By segmenting the wavelength conversion layer and color filter array to match this emission area segmentation, the patent achieves ultra-high resolution display while using standard manufacturing precision processes for each segmented unit, avoiding the need for extremely high precision across the entire panel at once.
3Illumination intensity
If color filters and wavelength conversion layers are aligned for precise light conversion, then color accuracy is improved, but device complexity worsens
Solution Approach 1:
The color filters and wavelength conversion layers are merged into a single integrated structure where the color filters are embedded within or directly adjacent to the wavelength conversion layer. This merging eliminates the need for separate alignment processes between two distinct layers, reducing device complexity while maintaining precise color conversion through the integrated optical path.
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 enables the formation of ultra-high resolution emission areas, enhances light emission efficiency for blue, green, and red lights, and improves color reproduction by aligning color filters and wavelength conversion layers for precise light conversion and filtering.
Implementation Method 1
wavelength conversion layers on the plurality of color filters, respectively, and configured to convert wavelengths of light emitted from the plurality of light emitting elements
Implementation Method 2
a plurality of color filters in the plurality of openings; wavelength conversion layers on the plurality of color filters, respectively, and configured to convert wavelengths of light
Data Source
AI summary
A display device includes: a plurality of light emitting elements on a first substrate; a second substrate facing the first substrate; a partition wall on one surface of the second substrate facing the first substrate, and including a plurality of openings; a plurality of color filters in the plurality of openings; wavelength conversion layers on the plurality of color filters, respectively, and to convert wavelengths of light emitted from the plurality of light emitting elements; and an adhesive layer adhering the first substrate and the second substrate to each other. The partition wall includes a silicon single crystal.