Nebula Projection Lamp with Rotating Diffraction Grating
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Solution Overview
Problem
Existing projection lamps fail to simulate the movement of stars and nebulae, have a complex and costly structure, and lack adjustable projection direction, limiting their ability to recreate a realistic and dynamic celestial experience.
Innovation Solution
A lamp design featuring a rotating optical sheet and diffraction sheet driven by a motor, combined with a laser assembly and frosted lens, which eliminates the need for a fixed optical sheet, allowing for dynamic projection of nebulae and starry skies that can be adjusted and remotely controlled.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixed optical sheet is used to project starry sky patterns, then the projection structure is stable, but the device complexity increases and cost rises
Solution Approach 1:
The patent removes the fixed optical sheet from the optical path entirely. Instead of using a static optical sheet to define star patterns, the invention uses direct laser projection through a rotating diffraction grating, extracting the unnecessary fixed optical component while maintaining projection functionality.
Solution Approach 2:
The patent introduces a rotating assembly that rotates the diffraction grating and light source assembly together. This dynamic rotation creates the starry sky projection effect without requiring a fixed optical sheet, transforming a static system into a dynamic one that achieves the same visual result with simpler optics.
2Ease of manufacture
If stationary projection patterns are used, then the manufacturing is simple, but the simulation of moving stars and nebulae is impossible
Solution Approach 1:
The rotating assembly enables dynamic projection by rotating the diffraction grating and light source assembly. This rotation creates moving star patterns and nebula effects, transforming a static projection system into a dynamic one that can simulate celestial motion while maintaining manufacturing simplicity.
Solution Approach 2:
The rotating assembly performs periodic rotation to create the illusion of moving stars and nebulae. By rotating at controlled speeds, the system generates dynamic projection patterns that simulate celestial motion, using periodic mechanical action to achieve versatile dynamic effects.
3Manufacturing precision
If multiple fixed optical components are used, then the projection quality is high, but the structure becomes complicated and costly
Solution Approach 1:
The patent extracts and removes multiple fixed optical components (fixed optical sheet, separate lenses, mirrors) from the system. By using direct laser projection through a rotating diffraction grating combined with a frosted lens, the invention achieves high projection quality with significantly fewer optical components.
Solution Approach 2:
The rotating diffraction grating serves multiple functions: it creates star patterns, defines nebula shapes, and controls light distribution. This single rotating component replaces what would traditionally require multiple fixed optical elements, achieving multi-functionality with a single universal component.
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 enables realistic simulation of rotating nebulae and starry skies, simplifies the lamp's structure, reduces costs, and allows for easy adjustment and remote control, providing a more immersive and flexible celestial projection experience.
Implementation Method 1
the laser assembly comprises a laser emitter and a heat sink
Implementation Method 2
a laser beam emitted by the laser emitter is configured to pass through the hollow protruding column and the diffraction sheet so as to form a moving projection of stars
Implementation Method 3
the light source assembly comprises a light source board, a light reflecting cup, the rotating optical sheet, and a lens assembly
Implementation Method 4
The light reflecting cup is configured to reduce a lighting angle of the light rays emitted by the light source board so as to enable the light rays emitted by the light source board to be projected onto the rotating optical sheet
Implementation Method 5
a second side of a lens of the lens assembly facing away from the rotating optical sheet has a frosted surface having an array of protrusions. The light rays scattered by the rotating optical sheet are configured to be projected onto a projection plane to form a projection of the nebula through the lens assembly after being scattered by the frosted surface of the lens assembly
Data Source
AI summary
The present disclosure discloses a lamp for projecting a nebula and a starry sky comprising a housing, a light source assembly, a laser assembly, a rotating assembly, a control board, a base seat, and a power source port. The light source assembly and the laser assembly are disposed in the housing and penetrate through the housing, and the rotating assembly and the control board are disposed in the housing. The rotating assembly is configured to drive a rotating optical sheet and a diffraction sheet to rotate. The light source assembly comprises a light source board, a light reflecting cup, the rotating optical sheet, and a lens assembly having a frosted surface with an array of protrusions. The light source board, the light reflecting cup, the rotating optical sheet, and the lens assembly are successively disposed along a path in which light rays emitted by the light source board move.