Projection Illumination Layout for Symmetric RGB Light Distribution
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Solution Overview
Problem
Current projection devices face challenges in achieving uniform color distribution and brightness due to the misalignment of light sources of different colors, leading to uneven illumination.
Innovation Solution
The illumination system incorporates multiple light source modules and optical elements to separately and evenly transmit red, blue, and green beams along distinct paths, using dichroic mirrors to align and combine these beams for uniform illumination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If light sources of different colors are formed on different modules with separate heat dissipation modules, then heat dissipation efficiency is improved, but the illumination system becomes overly large and color distribution becomes uneven
Solution Approach 1:
The patent combines multiple light source modules (first, second, and third light source modules emitting different colors) into a single integrated illumination system with a unified heat dissipation module, merging previously separate heat dissipation functions into one shared structure, thereby reducing overall system size while maintaining effective heat management
2Ease of manufacture
If light sources of different colors are formed on different modules, then individual light emission control is improved, but the combined light beams cannot be easily aligned along the same optical path
Solution Approach 1:
The patent segments the illumination system into multiple specialized light source modules (first light source module for first color, second light source module for second and third colors, third light source module for third color), each optimized for its specific function, while using optical elements to guide their beams along distinct but coordinated paths that converge at the projection target
3Reliability
If separate light source modules are used for different colors, then color purity is improved, but uniformity of illumination beam is degraded
Solution Approach 1:
The patent applies local quality by assigning different specialized functions to different modules (each light source module optimized for specific color emission) while using optical elements to redistribute and homogenize the light across the projection target, ensuring that each region receives appropriate color composition for uniform overall illumination
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
This configuration results in symmetrically distributed light spots and improved brightness by ensuring each path includes red, blue, and green light, providing uniform illumination.
Implementation Method 1
the first optical element, the second optical element, and the third optical element are all disposed on the transmission paths of the first color beam, the second color beam, and the third color beam
Implementation Method 2
using dichroic mirrors to align and combine these beams for uniform illumination
Data Source
AI summary
An illumination system includes a first light source module, a second light source module, a third light source module, a first optical element, a second optical element, and a third optical element. The first light source module provides only a first color beam. The second light source module provides only a second color beam and a third color beam. The third light source module provides the third color beam. The first to the third optical elements are disposed on transmission paths of the first to the third color beams. The first and second light source modules are respectively located on two opposite sides of the first optical element and the second optical element. The second optical element is located between the first and third optical element. In this way, brightness of the illumination system is improved, and uniformity of three colors in the illumination beam is improved.