Segmented Light Source Base for Projector Chromaticity
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Solution Overview
Problem
Existing light source devices with light-emitting elements and fluorescent members struggle to achieve desired output and chromaticity, as they often result in unwanted heat generation and limited color gamut coverage.
Innovation Solution
A light source device comprising a light-emitting element, a segmented base that controls light distribution, a fluorescent member excited by the light-emitting element, and a filter that transmits specific wavelengths to correct chromaticity and enhance output, using materials like borosilicate glass and inorganic binders to manage heat and improve efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a fluorescent member is used to convert light wavelength, then chromaticity is improved, but heat generation increases and output decreases
Solution Approach 1:
The base is divided into multiple segment regions (first, second, third segment regions) with different optical properties. The fluorescent member is selectively placed only in specific segments rather than uniformly across the entire base, allowing different regions to serve different functions: some for wavelength conversion, others for direct light transmission. This segmentation reduces unnecessary heat generation while maintaining chromaticity control.
Solution Approach 2:
Different regions of the base are assigned different optical characteristics. The first segment region has high light transmission for direct path light, the second segment region contains the fluorescent member for wavelength conversion, and the third segment region reflects light. This local differentiation optimizes each region's function, reducing overall heat generation while achieving desired chromaticity.
2Illumination intensity
If a fluorescent member is used to convert light wavelength, then chromaticity is improved, but device output is limited
Solution Approach 1:
The base is divided into multiple segment regions (first, second, third segment regions) with different optical properties. The fluorescent member is selectively placed only in specific segments rather than uniformly across the entire base, allowing different regions to serve different functions: some for wavelength conversion, others for direct light transmission. This segmentation reduces unnecessary heat generation while maintaining chromaticity control.
Solution Approach 2:
Different regions of the base are assigned different optical characteristics. The first segment region has high light transmission for direct path light, the second segment region contains the fluorescent member for wavelength conversion, and the third segment region reflects light. This local differentiation optimizes each region's function, reducing overall heat generation while achieving desired chromaticity.
3Productivity
If light is transmitted directly without filtering, then output is maintained, but chromaticity control is insufficient
Solution Approach 1:
The base is divided into multiple segment regions (first, second, third segment regions) with different optical properties. The fluorescent member is selectively placed only in specific segments rather than uniformly across the entire base, allowing different regions to serve different functions: some for wavelength conversion, others for direct light transmission. This segmentation reduces unnecessary heat generation while maintaining chromaticity control.
Solution Approach 2:
Different regions of the base are assigned different optical characteristics. The first segment region has high light transmission for direct path light, the second segment region contains the fluorescent member for wavelength conversion, and the third segment region reflects light. This local differentiation optimizes each region's function, reducing overall heat generation while achieving desired chromaticity.
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 achieves desired output and chromaticity by optimizing light transmission and reflection, extending the life of the device and enabling wider color gamut coverage, making it suitable for projectors and illuminating devices.
Implementation Method 1
a fluorescent member that is provided in at least one of the segment regions and that includes a fluorescent material that is excited by light from the light-emitting element and emits light with a different wavelength from the light emitted from the light-emitting element
Implementation Method 2
a filter that is provided so as to correspond to at least one of the fluorescent members, which transmits at least apart of light from the fluorescent material, and which transmits a part of light that is transmitted through the fluorescent member among the light from the light-emitting element
Data Source
AI summary
A light source device includes a light-emitting element; a base that includes a plurality of segment regions and that is controllable so that light from the light-emitting element sequentially enters the respective segment regions; a fluorescent member that is provided in at least one of the segment regions and that includes a fluorescent material that is excitable by light from the light-emitting element and configured to emit light with a different wavelength from the light emitted from the light-emitting element; and a filter that is provided so as to correspond to at least one of the fluorescent members, which is configured to transmit at least a part of light from the fluorescent material, and which is configured to transmit a part of light that is transmitted through the fluorescent member among the light from the light-emitting element.