Fluorescent Wheel Segmentation for Projector Color Gamut
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Projectors face a contradiction between color gamut and luminance, where high color gamut results in low luminance efficiency and vice versa, making it difficult to meet user requirements for both aspects simultaneously.
Innovation Solution
A fluorescent wheel with a substrate and a fluorescent layer divided into high and low color gamut regions, combined with a projection light source using dichroic mirrors to alternate between these regions during different frames, allowing for improved display effects by combining frames to homogenize luminance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the fluorescent wheel uses a single fluorescent layer for high color gamut, then the color gamut is improved, but the luminance efficiency deteriorates
Solution Approach 1:
The fluorescent layer is segmented into multiple regions with different fluorescent materials, each optimized for specific color ranges. This allows different parts of the spectrum to be generated by materials with different luminous efficiencies, resolving the contradiction between color gamut coverage and overall luminance efficiency.
Solution Approach 2:
Different regions of the fluorescent wheel are assigned different fluorescent materials with optimized properties for local color generation. This local optimization allows each region to contribute maximally to its specific color range while maintaining overall system efficiency, balancing color gamut and luminance.
2Loss of energy
If the fluorescent wheel uses a single fluorescent layer for high luminance efficiency, then the luminance is improved, but the color gamut deteriorates
Solution Approach 1:
The fluorescent layer is divided into multiple functional segments, each responsible for specific color ranges. This segmentation allows the system to achieve high luminance efficiency in each segment while collectively covering a broad color gamut, resolving the trade-off between luminance and color coverage.
Solution Approach 2:
The fluorescent wheel employs composite fluorescent materials with different emission characteristics in different regions. This composite approach enables the system to combine the high luminance efficiency of optimized materials with the broad spectral coverage needed for high color gamut, achieving both objectives simultaneously.
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 solution enhances display effects by incorporating both high and low color gamut portions in a single image, achieving a balance between color gamut and luminance, thereby improving the projector's overall performance.
Implementation Method 1
the fluorescent layer is excited by the first color light to give out a second color light
Implementation Method 2
the first color light emitted from the first sub-light source is reflected by first dichroic mirror and projected away from the fluorescent wheel; the second color light emitted from the second sub-light source is reflected by the first dichroic mirror and projected on the fluorescent layer
Data Source
AI summary
An embodiments of the present disclosure relate to a fluorescence wheel, a projection light source, a projector and its control method. The fluorescent wheel includes a substrate having a reflecting surface; and a fluorescent layer disposed on the reflecting surface of the substrate. The fluorescent layer includes a high color gamut region and a low color gamut region.