Solid-State Light Source Device with Wavelength Selective Planes
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Solution Overview
Problem
High-power LED light sources used in image display devices and vehicle lamps face inefficiencies in light condensation due to light absorption by pigments, leading to reduced light use efficiency and design limitations, especially when trying to extract specific colors.
Innovation Solution
A solid-state light source device comprising multiple light source cells and a light combining device with reflective and wavelength-selective planes, including a paraboloidal light reflecting/combining unit, which enhances light efficiency and allows for selective extraction of desired colors by optimizing light emission and reflection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If pigments are used to selectively transmit light of a specific color, then light of the desired color can be obtained, but light use efficiency is deteriorated due to light absorption by pigments
Solution Approach 1:
The patent replaces the chemical/optical filtering mechanism (pigments) with a structural optical system consisting of reflective planes and wavelength selective reflective planes. This structural approach redirects and separates wavelengths through reflection geometry rather than absorption, eliminating the energy loss associated with pigment absorption while maintaining color selectivity.
Solution Approach 2:
The patent introduces wavelength selective reflective planes as intermediary elements between the light source and the final output. These planes act as mediators that selectively reflect specific wavelengths while transmitting others, enabling color separation without the need for absorbing pigments, thus preserving light use efficiency.
2Illumination intensity
If pigments are used for color selection, then desired color transmission is achieved, but external light absorption causes coloring of external parts and design property deterioration
Solution Approach 1:
The patent replaces pigment-based optical filtering with a reflective optical system. By using wavelength selective reflective planes and geometric reflection, the system achieves color selection without absorbing external light, thereby preventing coloring of external parts and maintaining design flexibility.
3Illumination intensity
If a white light source is used with pigment filtering, then specific colors can be extracted, but position relationship between light source and lamp device is limited
Solution Approach 1:
The patent segments the optical system into multiple functional planes: reflective planes for light redirection and wavelength selective reflective planes for color separation. This segmentation allows independent optimization of each component's position and orientation, providing flexibility in arranging the light source and lamp device without compromising color extraction performance.
Solution Approach 2:
The patent utilizes three-dimensional spatial arrangement of reflective planes and wavelength selective planes to achieve color separation. By operating in multiple spatial dimensions rather than relying on a fixed linear path through pigments, the system provides flexibility in positioning the light source and lamp device while maintaining effective color extraction.
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 high light use efficiency and enables the selective extraction of desired colors, improving design flexibility and reducing external light absorption, resulting in enhanced performance for both image display devices and vehicle lamps.
Implementation Method 1
the light combining device has a reflective plane on a surface thereof, has a plurality of columnar-shaped regions divided along emission directions in an interior thereof, and has wavelength selective reflective planes in interfaces between the columnar-shaped regions
Implementation Method 2
light reflecting/combining unit reflecting the light emitted from the light source cells and emitting the light to the light combining device, and light reflecting/combining unit is configured in a substantially paraboloidal shape on a surface thereof
Data Source
AI summary
A solid-state light source device 1 includes a plurality of light source cells 10, a light combining device 20 combining light emitted from the plurality of light source cells and emitting combined light, and a light reflecting/combining unit 30 reflecting the light emitted from the light source cells and emitting the light to the light combining device. The light combining device 20 has a reflective plane on a surface thereof, has a plurality of columnar-shaped regions divided along emission directions in an interior thereof, and has wavelength selective reflective planes in interfaces between the columnar-shaped regions. The light reflecting/combining unit 30 is configured in a substantially paraboloidal shape having a reflective plane on a surface thereof. Accordingly, light use efficiency is improved, and light of a desired color can be selectively extracted.