Rotating Condensing Lampshade for Dynamic Starry Sky Projection
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Solution Overview
Problem
Conventional star projection lamps appear rigid and static, and often produce local strong, dazzling light, making it difficult to observe dynamic starry sky effects for extended periods.
Innovation Solution
A projection device with a rotating condensing lampshade arranged behind an interference disk, driven by a motor or belt drive assembly, which generates a moving cloud effect without directly rotating the interference disk, maintaining stable light paths and reducing intense local light.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If the interference disk is directly rotated to produce dynamic cloud effects, then the starry sky effect becomes dynamic, but the appearance remains rigid and static and causes local strong light that is too bright and dazzling
Solution Approach 1:
The patent extracts the rotation function from the interference disk and transfers it to the condensing lampshade. The interference disk remains stationary while the condensing lampshade rotates, carrying the interference patterns around the light source. This separation allows the dynamic effect to be achieved without rotating the interference disk, thereby avoiding local strong light while maintaining the moving cloud effect.
Solution Approach 2:
Instead of rotating the interference disk to create dynamic effects, the patent inverts the approach by rotating the condensing lampshade that contains the interference patterns. This inversion changes which component rotates, achieving the same dynamic visual effect but without the harmful local strong light concentration that occurs when the interference disk rotates directly.
2Shape
If the interference disk is arranged inside the projection device, then the structure is compact, but the rotation of the interference disk cannot be directly observed making the appearance rigid and static
Solution Approach 1:
The patent creates a visual copy of the rotation effect by projecting the interference patterns on the rotating condensing lampshade onto the surrounding environment. The actual rotation of the condensing lampshade is not directly visible, but its effect is copied and projected as moving cloud patterns, giving the appearance of dynamics without requiring direct observation of the rotating mechanism.
Solution Approach 2:
The condensing lampshade with integrated interference patterns is nested around the light source, with the interference patterns embedded on the lampshade surface. This nested structure allows the interference patterns to be carried along with the rotation of the lampshade, creating dynamic projections while maintaining a compact internal structure.
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 creates a dynamic, non-rigid appearance and reduces the intensity of local light, allowing for prolonged observation of the starry sky effect by isolating the rotation of the interference disk and using a rotating condensing lampshade to produce a moving cloud effect.
Implementation Method 1
The projection light generated by the first light sources generates an interference effect after passing through the interference disk
Implementation Method 2
The projection light generated by the first light sources generates an interference effect after passing through the interference disk
Implementation Method 3
a condensing lampshade arranged on the light paths of the first light sources and behind the interference disk
Implementation Method 4
The condensing lampshade further comprises a lens portion configured to expand a projection range
Data Source
AI summary
A projection device comprises first light sources, an interference disk, a condensing lampshade, and a driving device. Both of the interference disk and the condensing lampshade are arranged on light paths of the first light sources. The condensing lampshade is arranged behind the interference disk, and the interference disk is made stationary relative to the first light sources. The driving device drives the condensing lampshade to rotate. When the driving device drives the condensing lampshade to rotate, the projection light emitted after sequentially passing through the interference disk and the condensing lampshade projects an effect of clouds moving. The light paths of the projection light emitted by the first light sources are relatively stable after passing through the interference disk and before entering the condensing lampshade.