Annular Reflector Light Source Assembly for Uniform Projection
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Solution Overview
Problem
Projection devices face challenges with increased volume and cost due to multiple light sources requiring more optical elements, leading to uneven brightness and compromised image quality.
Innovation Solution
A light source assembly featuring a first annular reflector and a second annular reflector arranged coaxially, with multiple light source modules positioned annularly around the central axis, simplifying the optical path and ensuring uniform brightness by reflecting beams in a parallel direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the quantity of light sources is increased to improve brightness and color saturation, then the illumination performance is improved, but the volume of the projection device increases due to more optical elements
Solution Approach 1:
Multiple light sources (first light source module and second light source module) are merged into a single illumination optical path through the light source assembly. The first annular reflector and second annular reflector integrate beams from both light sources, allowing them to work together in one compact system rather than requiring separate optical paths for each light source.
Solution Approach 2:
The light source assembly adopts a nested structure where the first annular reflector and second annular reflector are arranged concentrically around a central axis. The first light source module and second light source module are positioned at different radial distances but share the same optical path, creating a compact nested arrangement that reduces overall device volume.
2Illumination intensity
If the quantity of light sources is increased to improve illumination performance, then the brightness is improved, but the cost of the projection device increases
Solution Approach 1:
Multiple light sources are merged into a single illumination optical path through the light source assembly. The first annular reflector and second annular reflector integrate beams from both light sources, allowing them to work together in one compact system rather than requiring separate optical paths for each light source.
Solution Approach 2:
The light source assembly serves multiple functions: it integrates beams from different light sources, provides uniform illumination, and maintains a compact structure. The annular reflectors and light source modules work together to achieve both brightness enhancement and cost reduction through shared optical components.
3Volume of stationary object
If light sources are arranged in limited space, then the device volume is reduced, but the brightness uniformity of the light spot deteriorates
Solution Approach 1:
The patent applies local quality by positioning light sources and reflectors at specific radial distances from the central axis. The first light source module and second light source module are placed at different radial positions, and the annular reflectors are designed with specific geometries to ensure that each region contributes appropriately to uniform overall illumination.
Solution Approach 2:
The first annular reflector and second annular reflector utilize curved surfaces arranged concentrically around the central axis. These curved reflective surfaces are designed to redirect light beams uniformly, ensuring that the combined light spot achieves even brightness distribution despite the compact arrangement of multiple light sources.
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 results in a compact, cost-effective projection device with improved image quality by reducing volume and enhancing light utilization and uniformity.
Implementation Method 1
The first reflective surface is configured to reflect the plurality of first beams to the second reflective surface
Implementation Method 2
The second reflective surface is configured to reflect the plurality of first beams and make the plurality of first beams emit out along a direction parallel to a central axis of the second annular reflector
Data Source
AI summary
A light source assembly includes a first annular reflector, a second annular reflector and a plurality of first light source modules. The first annular reflector has a first reflective surface. The second annular reflector is coaxial with the first annular reflector. A radius of the first annular reflector is greater than that of the second annular reflector. The second annular reflector has a second reflective surface facing the first reflective surface. The first light source modules take a central axis of the first annular reflector as a center and annularly arranged around the center. The first light source modules provide first beams to the first reflective surface, which reflects the first beams to the second reflective surface. The second reflective surface reflects the first beams and makes the first beams emit along a direction parallel to a central axis of the second annular reflector. A projection device is also provided.