Solid State Illuminator for Stereoscopic Displays Using Photoluminescence
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Solution Overview
Problem
Conventional stereoscopic display devices using wavelength multiplexing technology face inefficiencies and high costs due to the use of lasers, particularly in the green wavelength range, which are expensive and inefficient.
Innovation Solution
A solid state illuminator is designed with a configuration of light sources, photoluminescence elements, filters, and liquid crystal modules to control beam paths, enabling the optional provision of red, green, or blue beams, and two different sets of red, green, and blue beams sequentially, without overlapping wavelengths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If lasers are used as light sources in conventional stereoscopic display devices, then two sets of three primary colors can be produced, but the efficiency at green wavelength range is poor and the cost is high
Solution Approach 1:
The patent divides the light source system into multiple independent modules: a blue light source module and a yellow light source module. Each module can independently produce specific wavelengths, which are then combined to create the full color spectrum. This segmentation allows optimization of each module's efficiency while reducing overall system cost compared to using three separate lasers.
Solution Approach 2:
The patent introduces photoluminescence conversion layers as intermediary elements between the light sources and the final color output. These conversion layers convert the emitted light from the blue and yellow sources into the required red, green, and blue wavelengths, achieving efficient green light production without requiring expensive green lasers.
2Adaptability or versatility
If lasers are used as light sources, then two sets of primary colors can be produced for stereoscopic display, but the price significantly increases
Solution Approach 1:
The patent designs a universal light source system where the blue and yellow light sources serve multiple functions. By adjusting the photoluminescence conversion layers and optical paths, the same physical light sources can produce different wavelength combinations for left-eye and right-eye images, eliminating the need for separate laser systems for each eye.
Solution Approach 2:
The patent merges the functions of multiple light sources into a compact integrated system. The blue light source and yellow light source are combined with photoluminescence conversion layers to simultaneously generate red, green, and blue wavelengths, reducing the total number of components and lowering manufacturing costs while maintaining the capability to produce two sets of primary colors.
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 the efficiency and reduces costs by using solid state technology to produce stereoscopic images, improving the efficiency of green light production and reducing the overall cost of light sources, while maintaining effective beam control and image differentiation.
Implementation Method 1
a first photoluminescence module (500), a second photoluminescence module (600)... The first optical module (700) receives the first beam or the second beam from the path choosing module, enables the first beam to enter the first photoluminescence module and to be transformed into the third beam or the fourth beam
Implementation Method 2
The second beam transmits through the multi-band filter, and the first beam is reflected by the multi-band filter
Implementation Method 3
the path choosing module includes two liquid crystal optical modulators and a polarizing beam splitter, the liquid crystal optical modulators are disposed corresponding to the first light source and the second light source respectively
Implementation Method 4
the polarizing beam splitter is disposed on a plurality of paths of the first beam and the second beam, so that the first beam and the second beam pass through the liquid crystal optical modulators respectively and then both enter the polarizing beam splitter
Data Source
AI summary
A solid state illuminator for generating time sequential 6-primary color includes a first light source, a second light source, a path choosing module, a multi-band filter, a first photoluminescence module, a second photoluminescence module, a first optical module, and a second optical module. The first light source and the second light source provide a first beam with a first wavelength and a second beam with a second wavelength respectively, and the first wavelength is not overlapped with the second wavelength. The first optical module enables the first beam to enter the first photoluminescence module and guide the beam to pass through the multi-band filter to arrive at a predetermined position. The second optical module enables the second beam to enter the second photoluminescence module and guide the beam to be reflected by the multi-band filter to arrive at the predetermined position.