Duochromatic Laser Diode Module for Portable Projector Interactivity
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Solution Overview
Problem
Existing portable image projectors face challenges in implementing interactivity functionality in a cost-effective, efficient, and space-saving manner, as they require multiple laser diodes and additional optical components to generate imaging and interactive laser beams.
Innovation Solution
A duochromatic laser diode is used to generate two wavelengths of laser light, which are combined with monochromatic laser diodes' outputs to form a multi-spectral laser source, reducing the number of required diodes and optical components, and enabling interactivity through a single collimating optics system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple monochromatic laser diodes are used to generate imaging and interactive laser beams, then the required laser beams of different wavelengths can be obtained, but the number of laser diodes and optical components increases, leading to increased device complexity and space requirements
Solution Approach 1:
The patent combines a duochromatic laser diode (generating two wavelengths) with monochromatic laser diodes in a single laser module. The duochromatic laser diode integrates two laser sources into one component, reducing the total number of separate laser diodes needed while still providing multiple wavelengths for both imaging and interactivity functions
Solution Approach 2:
The laser module is designed to provide multiple functions using a reduced set of components. The duochromatic laser diode serves dual purposes by generating both imaging laser beams and interactive laser beams at different wavelengths, allowing a single component to perform multiple roles that would traditionally require separate laser diodes
2Adaptability or versatility
If multiple laser diodes and optical components are used, then comprehensive laser beam generation is achieved, but the production costs and adjustment complexity increase
Solution Approach 1:
By merging the duochromatic laser diode with monochromatic laser diodes in an integrated module design, the patent reduces the total component count. This integration simplifies the manufacturing process and reduces assembly adjustments needed, as fewer separate components require alignment and calibration
3Device complexity
If a duochromatic laser diode is used to reduce component count, then device complexity and space are reduced, but the collimating optics system must handle multiple wavelengths
Solution Approach 1:
The collimating optics system is designed with wavelength-specific optimization. The patent employs collimating lenses or optical elements that are tailored to work effectively with the specific wavelengths emitted by the duochromatic and monochromatic laser diodes, ensuring proper beam collimation for each wavelength range while maintaining a compact integrated design
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 approach reduces component count and space, lowers production costs, simplifies adjustment, and enhances interactivity accuracy by allowing simultaneous scanning and improved signal-to-noise ratio for interactive gestures detection.
Implementation Method 1
a laser diode (2a) which is designed to generate a first beam bundle (3a) having laser light of a first wavelength (650 nm or 635 nm or 780 nm)
Implementation Method 2
a first collimating optics system (5a) which is designed to collimate the first beam bundle (3a)
Data Source
AI summary
A laser module is described for an image projection system, which has a duochromatic laser diode designed to generate a first beam bundle having laser light of a first wavelength and laser light of a second wavelength; a first collimating optics system designed to collimate the first beam bundle; at least one first monochromatic laser diode designed to generate a second beam bundle having laser light of a third wavelength; a second collimating optics system designed to collimate the second beam bundle; and a first optical combination device developed to combine the first and second beam bundles in order to form an output beam bundle of the laser module.