Laser Projection Apparatus Using Inclined Light-Combining Components
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Solution Overview
Problem
Current laser projection apparatuses face limitations in achieving high projection brightness and compact volume due to the inefficiencies in combining and directing laser beams of different colors, particularly in the arrangement and combination of laser arrays and light-combining components.
Innovation Solution
The apparatus employs multiple laser arrays emitting different colors (red, green, and blue) and utilizes specific light-combining components that are inclined relative to each laser array, allowing for the transmission and reflection of laser beams to combine them effectively along distinct directions, thereby increasing the power and reducing the volume of the apparatus.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If multiple laser arrays emitting different colors are used to increase projection brightness, then the projection brightness is improved, but the volume of the apparatus increases due to separate optical paths
Solution Approach 1:
The patent combines multiple laser beams of different colors (red, green, blue) into a single integrated optical path using light-combining components. The first light-combining component merges red and green laser beams, while the second light-combining component merges blue and yellow laser beams. This merging allows multiple laser arrays to share common optical paths, increasing projection brightness without proportionally increasing apparatus volume.
Solution Approach 2:
The patent employs inclined light-combining components that redirect laser beams from perpendicular directions into a unified optical path. By using dichroic mirrors and beam-combining optics arranged at specific angles, the system integrates laser arrays emitting in different spatial dimensions into a single projection path, effectively combining multiple light sources without requiring separate optical paths for each color.
2Volume of stationary object
If laser arrays are arranged perpendicular to each other with inclined light-combining components, then the apparatus volume is reduced, but the complexity of combining and directing beams increases
Solution Approach 1:
The patent divides the beam-combining function into multiple sequential stages. The first light-combining component handles the combination of red and green laser beams, while the second light-combining component handles blue and yellow laser beams. This segmentation allows each component to focus on specific wavelength combinations, simplifying the overall design compared to attempting to combine all beams in a single complex optical element.
Solution Approach 2:
The patent uses dichroic mirrors as intermediary elements that selectively reflect or transmit specific wavelengths. These intermediaries facilitate the combination of different colored laser beams by directing them through appropriate optical paths before merging them. The beam-combining components act as mediators that integrate multiple perpendicular laser paths into a unified optical trajectory without requiring direct interaction between all beam sources.
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
This configuration enhances the projection brightness and reduces the volume of the laser projection apparatus by efficiently combining laser beams of different colors, allowing for more lasers to be arranged in a limited space without the need for separate optical paths, leading to improved imaging quality and reduced speckle effects.
Implementation Method 1
the first light-combining component is configured to transmit the first laser beams and reflect the second laser beams
Implementation Method 2
the second light-combining component is configured to transmit the third laser beams and reflect the fourth laser beams
Implementation Method 3
the beam-combining component is configured to make the first laser beams and the second laser beams emitted from the first light-combining component and the third laser beams and the fourth laser beams emitted from the second light-combining component advance along a third direction
Data Source
Figure 1
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Figure 4~5
AI summary
A laser projection apparatus includes a first laser array, a second laser array, a third laser array, a fourth laser array, a first light-combining component, a second light-combining component and a beam-combining component. The first laser array is configured to emit first laser beams of a first color. The second laser array is configured to emit second laser beams of the first color. The third laser array is configured to emit third laser beams of a second color. The fourth laser array is configured to emit fourth laser beams of a third color. The first color, the second color and the third color are different from each other, and each of the first color, the second color and the third color is one of red, green and blue.