Color Wheel with Segmented Filter Layers for Dual Color Gamut Support
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Solution Overview
Problem
Current display technologies using color wheels can only emit primary color light meeting a single color gamut requirement, limiting their application and unable to meet requirements for multiple types of color gamuts.
Innovation Solution
A color wheel design with a substrate, conversion layer, first filter layer, and second filter layer, where the conversion layer performs wavelength conversion, and the first and second filter layers filter excited light to achieve primary color light for two types of color gamuts, with the filter layers having distinct bandwidths and central angles to cover different color gamut ranges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single filter layer is used in the color wheel, then the device complexity is reduced, but the adaptability to support multiple color gamut ranges is limited
Solution Approach 1:
The color wheel is designed with multiple filter layers (first filter layer with first bandwidth and second filter layer with second bandwidth) that can selectively filter excited light to produce primary color light for different color gamut ranges. This multi-functional structure allows a single color wheel to support multiple color gamuts (e.g., first color gamut and second color gamut) without requiring separate devices, thereby improving adaptability while maintaining reasonable device complexity through integrated design.
Solution Approach 2:
The filter layer is segmented into multiple sections with different bandwidth characteristics. The first filter layer has a first bandwidth optimized for one color gamut, while the second filter layer has a second bandwidth optimized for another color gamut. This segmentation allows each layer to be specifically tuned for its target color gamut, enabling the system to handle multiple color gamut requirements through selective activation of appropriate filter layers.
2Adaptability or versatility
If the bandwidth of the filter layer is widened to cover more color ranges, then the adaptability improves, but the manufacturing precision requirements increase
Solution Approach 1:
Instead of using a single filter layer with a very wide bandwidth that would be difficult to manufacture precisely, the solution segments the filtering function into multiple filter layers. Each layer has a specific, controllable bandwidth (first bandwidth and second bandwidth respectively), making manufacturing more feasible. The combination of these segmented layers achieves the overall wide color gamut coverage through their coordinated spectral filtering characteristics.
Solution Approach 2:
The patent employs filter layers with different bandwidth parameters (first bandwidth vs. second bandwidth) to achieve different color gamut coverages. By varying the bandwidth parameter of each filter layer, the system can selectively optimize for different color gamut standards. This parameter-based approach allows flexible adaptation to different color gamut requirements while maintaining manufacturable bandwidth specifications for each individual layer.
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 design allows for flexible control of primary color light emission to meet various color gamut requirements, enhancing user experience by achieving different viewing effects for diverse image data.
Implementation Method 1
The conversion layer is configured to perform wavelength conversion on incident light to obtain excited light
Implementation Method 2
the first filter layer is configured to filter the excited light to obtain first light for modulating an image in a first color gamut range
Implementation Method 3
the second filter layer is configured to filter the excited light, to obtain second light for modulating an image in a second color gamut range
Data Source
AI summary
Provided is a color wheel. The color wheel includes a substrate, a conversion layer disposed on the substrate for wavelength conversion of incident light and obtaining irradiated laser, a first filter layer for filtering the irradiated laser to obtain a first light for modulating an image in a first color gamut range, and a second filter layer for filtering the irradiated laser to obtain a second light for modulating an image in a second color gamut range. Planes, in which the light incident surface of the conversion layer, the light incident surface of the first filter layer and the light incident surface of the second filter layer are located respectively, are parallel or coincide with each other.