Light Source Module for Optical Projection Device
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Solution Overview
Problem
Current laser projection devices have low optical efficiency due to the use of multiple dichroic mirrors, resulting in a large volume and high power consumption, which limits their application in personal use scenarios.
Innovation Solution
A light source module utilizing a reduced number of dichroic mirrors and a compact optical structure, where light from multiple light-emitting units is processed through optical units to generate beams of light with three colors, such as blue, red, and green, using a combination of reflection and transmission to enhance light output efficiency and reduce volume.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple dichroic mirrors are used to generate three-color light beams, then the light source can produce red, green, and blue light, but the device volume increases and optical efficiency decreases
Solution Approach 1:
The patent combines multiple dichroic mirrors into a single integrated optical component that can separate and direct multiple wavelengths simultaneously. This merging of optical functions into one compact element reduces the overall light engine volume while maintaining the capability to generate red, green, and blue light beams for projection.
Solution Approach 2:
The optical units in the patent are designed to perform multiple functions: wavelength separation, light direction, and beam combination. This multi-functionality allows the system to generate three-color light beams using fewer optical components, thereby reducing device volume without sacrificing adaptability.
2Adaptability or versatility
If multiple dichroic mirrors are used to process light, then three-color light beams can be generated, but the number of optical parts increases and light transmission efficiency decreases
Solution Approach 1:
The patent integrates the functions of multiple dichroic mirrors into a single optical component that can handle multiple wavelengths. This reduces the total number of optical parts from four or more to just one or two integrated elements, simplifying the device structure while maintaining three-color light generation capability.
Solution Approach 2:
The optical units are designed with multi-functional capabilities to perform wavelength separation, light reflection, and beam combination simultaneously. This universality allows the system to achieve three-color light output with fewer components, reducing device complexity.
3Illumination intensity
If arc lamp is used as light source, then the projector has sufficient brightness, but the power consumption is high and volume is large
Solution Approach 1:
The patent replaces the traditional arc lamp (thermal radiation source) with laser diodes (electrical-optical conversion devices). This substitution eliminates the need for high-power electrical heating and large bulb structures, significantly reducing power consumption and device volume while maintaining sufficient brightness through efficient laser light generation and optical amplification.
Solution Approach 2:
The patent changes the fundamental operating parameters of the light source from thermal radiation (arc lamp) to stimulated emission (laser). This parameter change enables much higher electrical-to-optical conversion efficiency, reducing power consumption while maintaining or improving brightness output.
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 higher light transmission efficiency and output rate, allowing for the generation of multiple beams of three-color light with a more compact design, reducing the number of optical parts and enabling efficient recycling of blocked light, thus addressing the limitations of existing technologies.
Implementation Method 1
at least two optical units which can process incident light in a first manner and a second manner
Implementation Method 2
at least two optical units which can process incident light in a first manner and a second manner
Implementation Method 3
light from a second light-emitting unit forms first converted light including light having a second wavelength upon being processed by the first optical unit in the first manner and converted by a first light conversion unit
Data Source
AI summary
The light source module may include a plurality of light-emitting units, at least two optical units, and at least two light conversion units. Light from a first light-emitting unit exits as first exiting light processed by a first and second optical units, light from a second light-emitting unit forms first converted light processed by the first optical unit and converted by a first light conversion unit, light from a third light-emitting unit forms second converted light processed by the second optical unit and converted by a second light conversion unit. The second converted light exits as second exiting light processed by the second and first optical unit, and the first converted light serves as third exiting light processed by the first optical unit and is combined with the first and second exiting lights to form a first beam having a first, second, and third wavelength.