Dual-Color Laser Module Package Integrating Red and Blue Dies
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Solution Overview
Problem
Conventional projector light sources, such as metal halide and high pressure mercury arc bulbs, suffer from high temperature, short durability, and low efficiency, while LED sources have optical loss due to wide light emission angles, and existing dual laser source structures are complex and costly.
Innovation Solution
A laser module package with dual colors and multi-dies is designed, featuring a housing with two printed circuit boards, reflectors, and collimators, where first and second dies emit red and blue laser beams respectively, reducing volume and cost by integrating dual colors in a single module with fewer electrodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single blue laser device with fluorescence wheel is used, then the structure is simple, but the red fluorescence emitting efficiency is low and color purity is poor
Solution Approach 1:
The patent combines multiple laser devices (blue laser device and red laser device) into a single integrated laser module package, merging their functions to achieve both structural simplicity and high emitting efficiency. The multiple dies are mounted on a common substrate with shared optical components, creating a unified system that resolves the contradiction between simplicity and performance.
Solution Approach 2:
The laser module package is designed as a multi-functional unit that can emit multiple colors (blue and red laser beams) simultaneously. The fluorescence wheel serves multiple purposes by receiving excitation from both blue and red laser devices, generating green and red fluorescence respectively, thus achieving universal color output from a single module.
2Reliability
If dual laser light sources are introduced, then color purity and stability are improved, but manufacturing costs increase and structure becomes complex
Solution Approach 1:
The patent merges dual laser light sources (blue laser device and red laser device) into a single integrated package with shared mounting substrate and optical components. This combination maintains the color purity benefits of dual sources while reducing overall structural complexity through integration.
Solution Approach 2:
The laser module package segments the dual laser system into independent dies mounted on a common substrate, allowing each laser device to be optimized for its specific function while sharing common support structures and optical paths, thus reducing complexity.
3Device complexity
If conventional bulb light sources are used, then the structure is simple, but durability is short and energy efficiency is low
Solution Approach 1:
The patent replaces conventional thermal bulb light sources with semiconductor laser diodes, substituting a mechanical/thermal system with a solid-state electronic system. This substitution dramatically improves durability (20000 hours vs. less than 1000 hours for metal halide bulbs) and energy efficiency while maintaining structural simplicity through direct electrical connection to PCBs.
4Duration of action of stationary object
If LED light sources are used, then durability and energy efficiency are improved, but optical loss increases due to wide light emission angle
Solution Approach 1:
The patent applies local quality control by using reflectors and collimators positioned specifically around each laser die to control the emission angle locally. The reflectors redirect light at specific angles, and collimators focus the beams, ensuring that energy is directed precisely where needed rather than dispersing widely, thus reducing optical loss while maintaining the durability benefits of LED technology.
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 provides a compact, efficient, and cost-effective laser module with stable dual color emission, reducing manufacturing complexity and external electrode count, while maintaining long durability and low energy consumption.
Implementation Method 1
a plurality of first dies and a plurality of second dies respectively emitting a plurality of first laser beams and a plurality of second laser beams
Implementation Method 2
said first and second dies respectively fixed on said first and second printed circuit boards and electrically connected thereto, forming a laser module with dual colors and multi-dies; a cover made of metals to be disposed on said housing and including a plurality of first openings and a plurality of second openings, each first opening arranged at a position correspondingly to a position of one first reflector
Implementation Method 3
each first collimator disposed in one of said first openings for said first reflectors to reflect a corresponding first laser beam to a corresponding first collimator and each second collimator disposed in one of said second openings for said second reflectors to reflect a corresponding second laser beam to a corresponding second collimator
Data Source
AI summary
A laser module package with dual colors and multi-dies mainly includes a first PCB arranged in long shape and electrically connected to a plurality of first dies, a second PCB arranged in long shape and electrically connected to a plurality of second dies, a plurality of first collimators correspondingly disposed in a plurality of first openings, and a plurality of second collimators correspondingly disposed in a plurality of second openings. A plurality of first reflectors correspondingly reflects laser beams emitted from the first dies to the first collimators and a plurality of second reflectors correspondingly reflects laser beams emitted from the second dies to the second collimators; or having a plurality of first metal pieces fixing corresponding first dies for the laser beams emitted therefrom to go through the corresponding first collimators and a plurality of second metal pieces fixing corresponding second dies for the laser beams emitted therefrom to go through the corresponding second collimators.