Rotating Grating Laser Projector for Animated Visuals
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Solution Overview
Problem
Traditional laser projection devices project only single fixed images, lacking the ability to create animated visuals, which is a limitation for decorative purposes during holidays and other occasions.
Innovation Solution
A laser projection device featuring a ring-shaped arrangement of gratings with a motor to rotate them, allowing sequential light passage from laser sources to project continuous and animated patterns, enabling the creation of dynamic images.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional laser projection devices use a fixed image projection system, then the device structure is simple, but the device can only project single fixed images without animation capability
Solution Approach 1:
The projection system is segmented into multiple independent gratings arranged in a ring, each grating containing specific pattern elements. By dividing the animation sequence into discrete grating segments, the system achieves animation capability while maintaining manageable structural complexity through modular design
Solution Approach 2:
The grating assembly is made dynamic through rotational movement driven by a motor. The gratings rotate to sequentially present different pattern elements to the laser beam, transforming a static projection system into a dynamic animation-capable device without requiring complex image processing mechanisms
2Adaptability or versatility
If a motor is added to rotate gratings for animation, then animated images can be projected, but the device complexity increases
Solution Approach 1:
The motor implements periodic rotational action to cycle through the ring of gratings at controlled intervals. This periodic rotation naturally synchronizes with the laser pulse frequency to create smooth animation sequences, achieving complex visual effects through simple repetitive mechanical motion
Solution Approach 2:
The rotating grating assembly serves multiple functions: it stores multiple animation frames, controls light modulation timing, and enables various animation sequences. This multi-functional design reduces the need for separate mechanisms for each animation function, thereby limiting the increase in overall device complexity
3Adaptability or versatility
If multiple gratings are arranged in a ring, then sequential light passage creates animation, but the manufacturing complexity increases
Solution Approach 1:
The animation sequence is segmented across multiple discrete gratings that can be manufactured independently using standard photolithography or etching processes. Each grating is a simple optical element that can be produced with conventional manufacturing techniques, avoiding the need for complex custom fabrication
Solution Approach 2:
Multiple individually manufacturable gratings are merged into a single rotating assembly that functions as one integrated animation system. The ring configuration allows straightforward mechanical mounting and alignment, combining several simple components into a cohesive unit that achieves animation capability without requiring complex assembly procedures
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 device effectively projects animated images by rotating gratings with sequential patterns, enhancing visual effects and overcoming the limitations of traditional devices by providing a changing image display.
Implementation Method 1
at least one laser light source... configured to emit a laser beam
Implementation Method 2
a plurality of gratings... each grating having a pattern for forming an image when light is passed through the pattern
Data Source
AI summary
A laser projection device has at least one laser light source and a plurality of gratings, each grating having a light receiving side and a light emitting side. The plurality of gratings are arranged in a ring-shape having at least one row with the light receiving side of each grating facing a center of the ring. The laser projection device also has a motor configured to rotate the plurality of gratings about a rotational axis passing through the center of the ring. The plurality of gratings each comprise a pattern for forming an image when light is passed through the pattern. The plurality of gratings are arranged around the ring such that the plurality of patterns are configured to project an animated image when the plurality of gratings sequentially receive light from the at least one laser light source upon rotation of the grating set.