Laser Diode Light Combiner Layout for Uniform Projection Spots
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing projection apparatuses with multiple laser diode chip packaged light sources experience uneven or asymmetric light spot generation, leading to reduced wavelength conversion efficiency and the need for additional lens elements or increased volume to compensate.
Innovation Solution
A light source module comprising laser diode arrays and light combiners with alternating transmissive and reflective regions, arranged in specific directions to evenly distribute light intensity, forming uniform light spots on a wavelength conversion element.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If multiple laser diode chip packaged light sources are arranged side by side, then the internal configuration becomes compact, but uneven or asymmetric light spot generation occurs
Solution Approach 1:
The light combiner is divided into multiple light combining units, each corresponding to a laser diode array. Each unit includes specific reflective regions and transmissive regions that segment the light paths, allowing independent control and optimization of light from each laser diode array, thereby achieving uniform light spot distribution while maintaining compact configuration
Solution Approach 2:
The patent introduces a second arrangement direction perpendicular to the first arrangement direction of laser diode arrays. The light combiner utilizes both directions for arranging reflective and transmissive regions, creating a two-dimensional light combining structure that effectively distributes light from multiple arrays in a compact space while ensuring uniform illumination
2Illumination intensity
If additional lens elements are added to improve light distribution, then light spot uniformity improves, but device complexity and volume increase
Solution Approach 1:
The light combiner performs multiple functions simultaneously: it combines light from multiple laser diode arrays, corrects light distribution uniformity, and directs light toward the wavelength conversion element. By integrating these functions into a single component with strategically arranged reflective and transmissive regions, the patent eliminates the need for additional dedicated lens elements, maintaining device simplicity while achieving uniform light spots
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 ensures uniform light intensity distribution, eliminating the need for additional lens elements and reducing the apparatus volume while maintaining high conversion efficiency.
Implementation Method 1
The first reflective regions are configured to reflect the second light from the second laser diode array to the second light combiner
Implementation Method 2
The second reflective regions are configured to reflect the third light from the third laser diode array to the third light combiner
Implementation Method 3
The third reflective region is configured to reflect the first light to the third light from the second light combiner to be transmitted in the second direction
Data Source
AI summary
A light source module includes a first to a fourth laser diode array and a first light combiner to a third light combiner. The first light combiner includes a plurality of first transmissive regions and a plurality of first reflective regions arranged in an alternate order along a first arrangement direction to guide a first light and a second light to the second light combiner. The second light combiner includes a plurality of second transmissive regions and a plurality of second reflective regions arranged in the alternate order along a second arrangement direction to guide first light to a third light to the third light combiner. The third light combiner includes a plurality of third transmissive regions and a third reflective region to guide the first to fourth light to be transmitted in the second direction.