Laser Projection Combining Component for Compact Low-Loss Optics
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Solution Overview
Problem
Existing laser projection apparatuses face challenges in miniaturization due to their large volume and inefficient optical design, which affects cost and display performance.
Innovation Solution
A laser projection apparatus with a compact design that includes a laser source, light modulating engine, and projection lens, utilizing a combining component with reflecting and transmitting regions, and a phosphor wheel to optimize beam paths and enhance optical efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If traditional laser projection apparatus design is used, then basic illumination function is achieved, but the volume is large and miniaturization is difficult
Solution Approach 1:
The patent combines multiple optical functions into a single integrating component that merges laser beam transmission and fluorescent beam reflection into one unified structure. This integration reduces the number of separate optical components and their associated mounting structures, directly reducing the overall volume of the laser projection apparatus while maintaining the necessary optical functionality.
Solution Approach 2:
The integrating component performs multiple functions simultaneously: it transmits laser beams from the laser device, reflects fluorescent beams from the phosphor wheel, and directs both beam types through the same optical path to the display component. This multi-functionality eliminates the need for separate optical paths and components, enabling miniaturization without sacrificing performance.
2Loss of energy
If traditional optical design is used, then illumination function is achieved, but optical efficiency is low with significant beam loss
Solution Approach 1:
By merging laser and fluorescent beam paths through a single integrating component, the patent eliminates multiple beam direction changes and optical interface losses. The unified optical path reduces scattering and absorption at component interfaces, thereby reducing overall optical loss and improving efficiency.
Solution Approach 2:
The integrating component features locally optimized optical surfaces with different properties: one side transmits laser beams with high transmission quality, while the other side reflects fluorescent beams with high reflectivity. This local optimization of optical properties at different locations on the same component minimizes losses for both beam types simultaneously.
3Volume of moving object
If compact design is implemented, then miniaturization is achieved, but display effect may be compromised
Solution Approach 1:
The integrating component's ability to handle both laser and fluorescent beams through a single unified structure ensures that all optical energy is efficiently directed to the display component. This multi-functional design maintains high illumination intensity by preventing energy loss that would occur with multiple separate components, even in a compact configuration.
Solution Approach 2:
The component's surface is locally optimized with high-transmission regions for laser beams and high-reflectivity regions for fluorescent beams. This local quality optimization ensures maximum light intensity is preserved for each beam type, maintaining superior display effect despite the reduced overall size of the apparatus.
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 compact design improves the miniaturization and display performance by increasing the utilization rate of laser and fluorescent beams, reducing optical losses, and enhancing the display effect.
Implementation Method 1
the second region is configured to be excited to emit a fluorescent beam due to irradiation of the laser beams converged by the first lens
Implementation Method 2
The reflecting region is configured to reflect a laser beam and a fluorescent beam incident on the reflecting region
Implementation Method 3
The first lens is configured to converge the laser beams transmitted by the transmitting regions
Data Source
AI summary
A laser projection apparatus includes a laser source, a light modulating engine and a projection lens. The laser source includes a laser device, a combining component, a first lens and a phosphor wheel. The combining component includes a reflecting region and two transmitting regions. The reflecting region is configured to reflect a laser beam and a fluorescent beam incident on the reflecting region. The two transmitting regions are disposed on two sides of the reflecting region respectively, and the transmitting regions are configured to transmit a plurality of laser beams emitted by the laser device. The phosphor wheel includes a first region and a second region. The first region is configured to diffuse and reflect the laser beams incident on the first region. The second region is configured to be excited to emit a fluorescent beam due to irradiation of the laser beams incident on the second region.