Triangular Prism Illumination Assembly for Compact Projection
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Solution Overview
Problem
Conventional light guide assemblies for projection devices are large in size and complex in structure, making it difficult to reduce the size and cost of projection devices while meeting market demands for brightness, color saturation, and service life.
Innovation Solution
An illumination assembly featuring a light source module and a light guide module with a first light guide triangular prism that includes a beam-splitting surface, allowing multiple beams with different wavelengths to be integrated, resulting in a compact, simple structure and low cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional light guide assemblies are used to guide beams from multiple light sources, then the projection device can meet market demands for brightness and color saturation, but the device size becomes large and the structure becomes complex
Solution Approach 1:
The patent combines multiple light guide functions into a single integrated light guide assembly. The light guide assembly includes a light guide plate with multiple light guide regions that can guide beams from different light sources (laser, LED, lamp) through a unified structure, eliminating the need for separate light guide components for each light source and reducing overall structural complexity
Solution Approach 2:
The light guide assembly is designed as a multi-functional component that can handle multiple wavelengths and beam types simultaneously. The beam splitting layer can separate different wavelengths, while the light guide plate can guide various types of light beams (laser, LED, lamp) through the same structure, making the assembly universal for different light source configurations
2Adaptability or versatility
If conventional light guide assemblies are used to guide beams from multiple light sources, then the projection device can provide beams with different wavelengths, but the device size cannot be reduced
Solution Approach 1:
The patent utilizes the thickness dimension of the light guide plate to accommodate multiple light guide regions and beam paths. By arranging light guide regions at different positions and orientations within the plate's thickness, the design can handle multiple wavelengths and beam types without increasing the planar footprint, effectively using the third dimension to reduce overall device volume
Solution Approach 2:
The light guide regions are nested within the light guide plate structure, with each region containing specific optical pathways for different wavelengths. The beam splitting layer is integrated within the light guide assembly, creating a compact nested arrangement where multiple functional elements are contained within a single unified structure, minimizing the overall device size
3Adaptability or versatility
If conventional light guide assemblies are used to guide beams from multiple light sources, then the projection device can provide beams with different wavelengths, but the cost is difficult to reduce
Solution Approach 1:
The light guide plate is divided into multiple light guide regions, each optimized for specific wavelength ranges or beam types. This segmentation allows for modular manufacturing where each region can be independently processed or adjusted, simplifying the overall manufacturing process and reducing costs compared to creating entirely separate light guide assemblies for each wavelength
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 small volume, simple structure, and low-cost projection device with improved image quality by integrating multiple beams, addressing the size and cost issues of conventional systems.
Implementation Method 1
The first light guide layer is configured to guide the first beam to the first beam-splitting layer
Implementation Method 2
The first beam-splitting layer is configured to allow the second beam to pass therethrough and reflect the first beam
Data Source
AI summary
An illumination assembly includes a light source module and a light guide module. The light source module provides first and second beams. The light guide module includes a first light guide triangular prism having a first surface, a second surface and a beam-splitting surface. The first surface is located on a transmission path of the first beam, and the beam-splitting surface is located on a transmission path of the second beam. The first light guide triangular prism includes a first light guide layer arranged on the second surface and a first beam-splitting layer arranged on the beam-splitting surface. The first light guide layer guides the first beam to the first beam-splitting layer. The first beam-splitting layer allows the second beam to pass therethrough and reflect the first beam, so that the first and second beams are emitted from the second surface. A projection device is also provided.