Reflective Dynamic Projector with Bump Textures

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Solution Overview

Problem

Existing starry sky projection lamps rely on direct light sources and large, heavy glass lenses, which complicate design, increase weight, and make them prone to damage.

Innovation Solution

A reflective dynamic projector with a diffuse reflection surface and rotating light sources, eliminating the need for glass lenses by using bump textures on the reflective surface to create a diffuse reflection effect, supported by a motor-driven system and gear mechanisms for pattern projection.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Illumination intensity

If direct light sources with glass lenses are used to project starry sky effects, then the light projection function is achieved, but the device becomes heavy and complex in structure

Engineering Contradiction:

Improvelight projection effectVSAvoidweight of glass lens

Core Design Contradiction:

Illumination intensityVSWeight of stationary object

Solution Approach 1:

The patent removes the glass lens component entirely from the optical system. Instead of using a lens to focus and project light, the invention uses a reflective element with bump textures that directly reflects light from LED sources to create the starry sky projection effect, eliminating the heavy glass lens while maintaining the light projection function

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent replaces the optical-mechanical lens system with a reflective optical system using LED light sources and a textured reflective element. This substitution eliminates the need for heavy glass lenses while achieving the same starry sky projection effect through light reflection and diffusion

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Illumination intensity

If large glass lenses are used for light projection, then the projection effect is achieved, but the device complexity and manufacturing difficulty increase

Engineering Contradiction:

Improveprojection effectVSAvoidstructure complexity

Core Design Contradiction:

Illumination intensityVSDevice complexity

Solution Approach 1:

The patent extracts and removes the complex glass lens assembly from the device. The simplified design uses only LED light sources mounted on a circuit board and a reflective element with bump textures, eliminating the need for precise optical alignment and complex mechanical structures required for lens mounting

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent changes the optical approach from refraction-based lens projection to reflection-based projection. By using a reflective element with specific bump texture parameters, the system achieves starry sky projection without requiring the precise optical parameters and complex adjustments needed for glass lenses

Inventive Principle:

Principle #35Parameter changes

3Illumination intensity

If glass lenses are used in the projection system, then light projection is achieved, but the reliability decreases due to susceptibility to damage

Engineering Contradiction:

Improvelight projection functionVSAvoiddurability against damage

Core Design Contradiction:

Illumination intensityVSReliability

Solution Approach 1:

The patent replaces the fragile, expensive glass lens with a durable reflective element that can be made from robust materials. The LED light sources are also more reliable and longer-lasting than traditional bulb-based systems, improving overall system reliability and reducing maintenance needs

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

Solution Approach 2:

The patent substitutes the fragile glass lens with a reflective element that has no moving parts and is resistant to breakage. This mechanical substitution significantly improves the reliability of the projection system, making it suitable for various environments including mobile and outdoor applications

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

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

Simplifies the structure, reduces weight, and enhances durability while projecting a realistic aurora effect without the need for glass lenses, improving user experience with a more robust and efficient design.

Implementation Method 1

a reflective element with a reflective surface, wherein there are bump textures arranged on the reflective surface which make the reflective surface to be a diffuse reflection surface

Methodology Applied

Scientific EffectDiffuse reflection: Reflection

Data Source

PatentUS11215912B1Reflective dynamic projector and starry sky lamp

Publication Date: 2022.01.04 SHENZHEN JINGDU TECH CO LTD

AI summary

A reflective dynamic projector includes a light projection device. The light projection device includes a reflective element with a reflective surface, a plurality of first light sources, and a first driving unit. There are bump textures arranged on the reflective surface which make the reflective surface to be a diffuse reflection surface. The reflective surface surrounds the plurality of first light sources and each of the plurality of first light sources is arranged towards the reflective surface; or an outer surface of the reflective element is the reflective surface, the plurality of first light sources surrounds the reflective element, and each of the plurality of first light sources is arranged towards the reflective surface. The first driving unit is connected with the reflective element or the plurality of first light sources and drives the reflective element or the plurality of first light sources to rotate.