Projection Lamp Optical Assembly for Uniform Brightness
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing projection lamps suffer from non-uniform brightness due to Lambertian distribution, stray light, and complex assembly, leading to unsatisfactory projection effects and increased size, which is problematic for automotive applications.
Innovation Solution
An image projection apparatus with a lighting assembly and optical components, including compound eyes and snap-fit connections, to control light distribution and simplify assembly, ensuring high-definition and large-range projections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If multiple lenses are designed inside the projection lamp to correct images, then image correction capability is improved, but the length and overall size of the projection lamp increase
Solution Approach 1:
The projection lamp is divided into multiple modular components including a light source module, image generation module with diffractive optical element, and projection module with compound eye lens array. Each module can be independently optimized and assembled, reducing the overall length while maintaining image correction capability through the specialized diffractive structure
Solution Approach 2:
The patent employs a diffractive optical element with specific micro-structure parameters to achieve image correction. By changing the optical parameters from traditional refractive lenses to diffractive structures, the system achieves compact size with effective image correction through precise control of light diffraction patterns
2Manufacturing precision
If multiple lenses are designed inside the projection lamp to correct images, then image correction capability is improved, but the processing complexity and cost increase
Solution Approach 1:
The patent combines multiple optical functions (collimation, image generation, projection, and correction) into integrated modules. The diffractive optical element integrates image correction and light distribution functions, while the compound eye lens array combines multiple lens elements into a unified structure, simplifying manufacturing processes and reducing costs
Solution Approach 2:
The patent replaces complex mechanical lens assemblies with a diffractive optical element that achieves image correction through micro-structure patterns rather than mechanical lens positioning. This substitution simplifies manufacturing by using precision molding techniques for the diffractive structures instead of complex mechanical assembly
3Device complexity
If traditional projection systems are used with weak light control capability, then device complexity is reduced, but stray light increases and projection definition decreases
Solution Approach 1:
The compound eye lens array provides localized light control for each projection element, with each lens precisely directing light from its corresponding image generation point. This local optimization prevents stray light by ensuring each light path is precisely controlled, achieving high definition projection without requiring complex overall system design
Solution Approach 2:
The diffractive optical element acts as an intermediary between the light source and projection modules, pre-structuring the light distribution patterns before they reach the projection lenses. This intermediary structure controls light paths early in the system, preventing stray light generation while maintaining relatively simple downstream optical components
4Area of stationary object
If the projection lamp occupies large space in automobile, then projection range is reduced, but assembly and installation become more difficult
Solution Approach 1:
The projection lamp is segmented into independent modules that can be pre-assembled and tested separately, then installed as compact units in the automobile. The modular design with standardized interfaces simplifies installation while the compact integrated structure minimizes space occupation in the vehicle
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 apparatus achieves uniform brightness and high-definition projections with reduced assembly complexity and cost, suitable for automotive use.
Implementation Method 1
a first snap-fit piece, disposed at the first optical component; a second optical component, configured to allow the light passing through the first optical component to pass through; and a second snap-fit piece, disposed at the second optical component, and adapted to be connected with the first snap-fit piece in a snap-fit fashion to assemble the first optical component and the second optical component integrally
Data Source
AI summary
Provided in the present disclosure are an image projection device, and a method for manufacturing the image projection device. The image projection device comprises: an illumination assembly for emitting a light beam; and a first optical component, which is used for allowing light emitted by the illumination assembly to pass through. The image projection device is characterized in further comprising: a first fastening member, which is arranged on the first optical component; a second optical component, which is used for allowing the light passing through the first optical component to pass through; and a second fastening member, which is arranged on the second optical component and adapted to be fastened to the first fastening member, so as to assemble the first optical component and the second optical component as a whole.