Scanning Projector Uniform Beam Distribution via Multi-Source Segmentation
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Solution Overview
Problem
Scanning projectors face challenges in achieving uniform image scanning due to non-uniform beam distribution, leading to degradation in image quality and resolution, particularly when using progressive scanning methods that result in regions with densely or sparsely disposed scanning beams between pixels.
Innovation Solution
The scanning projector employs multiple color light sources, such as red, green, and blue laser diodes, with collimating lenses and light combining units to ensure parallel beam projection, and utilizes a processor to control the scanner's operation, including phase offset between frames to achieve uniform scanning in both horizontal and vertical directions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If progressive scanning method is used to generate images, then scanning speed is improved, but beam distribution becomes non-uniform causing image quality degradation
Solution Approach 1:
The patent applies local quality by differentiating the treatment of light beams at different positions. Multiple light sources are positioned and oriented to provide uniform beam distribution across different regions of the scanning area, with each light source contributing to specific spatial zones to ensure consistent illumination quality throughout the entire projection area.
Solution Approach 2:
The patent introduces a spatial dimension by arranging multiple light sources at different positions and orientations. This multi-dimensional arrangement of light sources allows the system to compensate for the non-uniform beam distribution inherent in progressive scanning, achieving uniform coverage across the projection area while maintaining high scanning speed.
2Manufacturing precision
If multiple light sources are used to improve beam distribution, then image quality is enhanced, but device complexity increases
Solution Approach 1:
The patent applies universality by designing a system where multiple light sources serve multiple functions: they provide uniform beam distribution, compensate for scanning artifacts, and maintain image quality across different regions. The light sources are configured to work together as an integrated system that addresses multiple quality requirements simultaneously.
Solution Approach 2:
The patent utilizes parameter changes by adjusting the orientation, position, and emission characteristics of multiple light sources. By optimizing these parameters, the system achieves uniform beam distribution and improved image quality while managing the complexity through controlled variation of light source configurations.
3Productivity
If scanning beams are densely disposed between pixels, then scanning coverage is improved, but image resolution deteriorates due to non-uniform distribution
Solution Approach 1:
The patent applies local quality by ensuring uniform beam distribution across different spatial regions. Multiple light sources are positioned and oriented to provide consistent scanning coverage throughout the projection area, preventing the densely disposed beam regions that cause resolution degradation while maintaining comprehensive scanning coverage.
Solution Approach 2:
The patent segments the scanning system into multiple independent light sources, each contributing to specific regions. This segmentation allows for more uniform distribution of scanning beams across the entire area, preventing clustering of beams in particular regions and thereby maintaining image resolution while preserving scanning coverage.
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 approach enhances image quality by ensuring uniform beam distribution across the screen, reducing power consumption, and preventing image distortion, while maintaining high resolution and processing speed.
Implementation Method 1
collimating lenses to ensure parallel beam projection
Implementation Method 2
scanner configured to execute scanning in a horizontal direction and scanning in a vertical direction using light beams emitted from the light source unit
Data Source
AI summary
A scanning projector and a method for operating a scanning projector including a light source module including a plurality of color light sources including at least one color light source provided in a plurality, and a scanner configured to execute scanning in the horizontal direction and the vertical direction using light beams emitted from the light source module. Light beams emitted from the plurality of same color light sources are projected on different positions on a screen within one frame and, thus, more rapid and effective scanning may be executed and a high-quality image may be formed.