Night Light Projector with Rotating Plastic Film Dome
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Solution Overview
Problem
Existing night light projectors lack the ability to produce dynamic and clear imaging on walls or ceilings with varied patterns, often resulting in low transparency and high revolving speeds that cause user discomfort.
Innovation Solution
A night light projector with a rotatable plastic film dome made of high transparency materials like PET or PVC, coated with photosensitive ink for pattern projection, and a motor-driven gear system to control the dome's slow rotation, combined with a light emitter using individual control of Red, Green, Blue, and White LEDs for various emitting modes, ensuring stable and clear image projection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the projector uses a rotating dome to produce dynamic imaging, then the imaging variety is improved, but the revolving speed becomes too high causing user dizziness
Solution Approach 1:
The patent applies the Dynamics principle by implementing a controllable rotation system that can adjust between static and rotating states. The motor-driven rotator allows the dome to rotate at controlled speeds (0.5-2 RPM) or remain stationary, enabling the system to adapt its imaging behavior dynamically. This resolves the contradiction by providing both dynamic imaging variety through rotation and user comfort through controllable, slow rotation speeds.
2Adaptability or versatility
If the projector uses a rotating dome for pattern projection, then the dynamic imaging capability is improved, but the image clarity deteriorates due to motion blur
Solution Approach 1:
The system implements dynamics by allowing the dome to switch between static and rotating states. When high image clarity is needed, the dome remains stationary. When dynamic imaging variety is desired, the dome rotates at controlled slow speeds (0.5-2 RPM). This dual-state capability resolves the contradiction between dynamic imaging capability and image clarity.
Solution Approach 2:
The patent applies parameter changes by controlling the rotation speed within a specific range (0.5-2 RPM) to optimize both dynamic effect and image clarity. The slow rotation speed parameter ensures that the dome moves enough to create dynamic imaging variety but slowly enough to prevent motion blur, thus resolving the contradiction through precise parameter control.
3Loss of energy
If the projector uses high transparency material for the dome, then the light transmission efficiency is improved, but the structural strength deteriorates
Solution Approach 1:
The patent applies composite materials by using transparent plastic materials (such as PMMA or PC) that combine high light transmission properties with sufficient structural strength. These composite materials resolve the contradiction by simultaneously providing the needed optical performance (high transparency for light transmission efficiency) and mechanical performance (structural strength to support the dome shape and withstand rotation).
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 projector effectively produces dynamic images on walls or ceilings with improved clarity and reduced revolving speed, enhancing user experience through adjustable projection and reduced dizziness, while maintaining high transparency and stability.
Implementation Method 1
the plastic film dome covers the light emitter and allows partly transmitting and projecting the light from the light emitter
Implementation Method 2
the plastic film dome is made by material comprising PET or PVC and is partly coated with photosensitive ink so as to form multiple graphic patterns on the surface
Implementation Method 3
the gear ring is driven by a motor mounted in the housing so as to indirectly drive the plastic film dome on the support bracket to rotate
Data Source
AI summary
A night light projector comprises a housing and a light emitter accommodated in the housing. The projector further comprises a rotator rotatable around the light emitter and a plastic film dome placed on the rotator and rotatable with the rotator. The plastic film dome covers the light emitter and allows partly transmitting and projecting the light from the light emitter. By means of the rotatable plastic film dome, the projector is able to project rotating spatial pattern into surrounding space.