Laser Light Source with Dynamic Diffusion Plate for 3D Projection
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Solution Overview
Problem
Existing projection-type three-dimensional display apparatuses using laser light sources are bulky due to separate light source units and significant optical losses through fiber connections, necessitating a compact and efficient light source solution.
Innovation Solution
A light source apparatus comprising multiple color laser light sources with dichroic mirrors to combine and polarize light, and a dynamic diffusion plate to eliminate speckle noise, achieving a compact, high-efficiency light source with wide color gamut.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a separate laser light source apparatus is used and connected via optical fiber, then output brightness adjustment range is wide, but the entire size becomes large and optical loss increases
Solution Approach 1:
The patent combines the laser light source unit with the projection-type three-dimensional display apparatus into a single integrated system. The laser light source is positioned adjacent to the image forming element, eliminating the need for separate apparatus and optical fiber connections, thereby reducing overall size while maintaining brightness control capability through direct optical coupling
2Illumination intensity
If a separate laser light source apparatus is used and connected via optical fiber, then output brightness adjustment range is wide, but optical loss increases
Solution Approach 1:
The patent combines the laser light source unit with the projection-type three-dimensional display apparatus into a single integrated system. The laser light source is positioned adjacent to the image forming element, eliminating the need for separate apparatus and optical fiber connections, thereby reducing overall size while maintaining brightness control capability through direct optical coupling
3Productivity
If multiple color laser light sources are used, then efficiency and color gamut improve, but device complexity increases
Solution Approach 1:
The patent combines multiple laser light sources (red, green, blue) and the image forming element into a single integrated apparatus, reducing the number of separate components and simplifying the overall system architecture while maintaining high efficiency and wide color gamut performance
Solution Approach 2:
The integrated apparatus performs multiple functions within a single device: it generates multiple wavelengths through laser diodes, modulates images through the DMD, and projects three-dimensional images, thereby reducing device complexity through functional integration
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 enables a compact, high-efficiency light source apparatus that reduces optical losses and speckle noise, resulting in a projection-type three-dimensional display with a wide color gamut and small size, improving upon the bulkiness and inefficiencies of prior art.
Implementation Method 1
a plurality of dichroic mirrors that combines the color light rays and outputs a combined color light rays; and one of the dichroic mirrors is a dichroic mirror that reflects blue light
Implementation Method 2
a dynamic diffusion plate that diffuses incident light rays from the plurality of dichroic mirrors so as to remove speckles specific to laser beams
Implementation Method 3
The blue laser light source generates a P-polarized short-wavelength-band laser beam, and an S-polarized long-wavelength-band laser beam having a wavelength longer than a wavelength of the short-wavelength-band laser beam
Data Source
AI summary
A light source apparatus includes a plurality of laser light sources configured to emit color light rays having multiple wavelength bands. The light source apparatus further includes a plurality of dichroic mirrors configured to combine the color light rays and output combined color light rays; and a dynamic diffusion plate configured to diffuse incident light rays from the plurality of dichroic mirrors so as to remove speckles specific to laser beams. One of the plurality of dichroic mirrors is configured to reflect blue light, and each of the plurality of laser light sources includes a blue laser light source. The blue laser light source is configured to generate a P-polarized short-wavelength-band laser beam, and an S-polarized long-wavelength-band laser beam having a wavelength longer than a wavelength of the P-polarized short-wavelength-band laser beam.