Projection Light Engine Module Segmentation for High Luminance
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Solution Overview
Problem
High-luminance projection systems with single digital micromirror devices face challenges in meeting market demands due to limited luminance and high production costs, particularly with the expensive digital micromirror device technology.
Innovation Solution
A projection device and light engine module design incorporating a light source module with a first and second dichroic element, light valves, converging elements, and guiding elements to divide and convert illumination beams into color beams, reducing the size of the light combining element and overall module volume, allowing for a smaller projection lens and lower manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a single digital micromirror device is used for high-luminance projection, then the projection system can be simpler in structure, but the luminance requirement cannot be met and the cost is high
Solution Approach 1:
The patent divides the light engine into two separate light engines, each processing a different color channel (first light engine for first color, second light engine for second color). This segmentation allows each light engine to be optimized independently, achieving high luminance for each color channel while maintaining overall system manageability and cost-effectiveness.
2Device complexity
If a single digital micromirror device is used, then the device structure is simpler, but the production cost increases
Solution Approach 1:
By segmenting the light engine into two separate units, each handling a specific color channel, the patent enables independent manufacturing and optimization of each module. This approach reduces the complexity of manufacturing a single high-performance device while lowering overall production costs through modular assembly.
3Ease of operation
If the light combining element is made larger to accommodate wider opening angles, then all color beams can be combined effectively, but the overall module volume increases
Solution Approach 1:
The patent separates the light combination process into two independent light engines, each combining light beams for a specific color channel. This segmentation allows each light combining element to be optimized for its specific function with appropriate size, rather than requiring one large element to handle all color channels simultaneously, thus reducing overall module volume.
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 design achieves high luminance projection while reducing production costs and module size, simplifying lens design and reducing light interference, enabling a more competitive and cost-effective high-luminance projection solution.
Implementation Method 1
The first dichroic element is disposed on a transmission path of the illumination beam and is used for dividing the illumination beam into a first color beam and a second color beam. The first wavelength range of the illumination beam passes through the first dichroic element to form the first color beam. The second wavelength range of the illumination beam is reflected by the first dichroic element to form the second color beam.
Implementation Method 2
The first light converging element is disposed between the first light valve and the light combining element.
Implementation Method 3
The second light converging element is disposed between the second light valve and the light combining element.
Implementation Method 4
The light combining element is disposed on transmission paths of the first image beam from the first light valve and the second image beam from the second light valve.
Data Source
AI summary
A projection device and a light engine module thereof are provided. The light engine module includes a first dichroic element, a first light valve, a second light valve, a light combining element, a first light converging element, a second light converging element, a first light guiding element, and a second light guiding element. The first dichroic element divides an illumination beam into a first color beam and a second color beam. The first light valve converts the first color beam into a first image beam. The second light valve converts the second color beam into a second image beam. The light combining element is disposed on transmission paths of the first image beam and the second image beam. The first light guiding element guides the first color beam to the first light valve.