Multi-wavelength Emitter Array Using Electro-Optic Waveguide Switching
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Solution Overview
Problem
Current multi-wavelength arrays face limitations in efficiently emitting multiple wavelengths and require complex fabrication methods, which can lead to reduced reliability and increased costs.
Innovation Solution
The development of an array of pixel assemblies using electro-optically active waveguides with discrete emitters and switches that can redirect wavelengths by 90 degrees, allowing for the emission of multiple wavelengths through a pixel area, facilitated by a backplane electronic circuit for switching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If complex fabrication methods are used to create multi-wavelength arrays, then multiple wavelengths can be emitted, but reliability decreases and costs increase
Solution Approach 1:
The invention segments the multi-wavelength emission function into separate discrete emitters (e.g., separate LED chips for red, green, blue wavelengths) rather than attempting to create a single complex multi-wavelength source. Each emitter is independently fabricated and then bonded to the waveguide, simplifying the fabrication process for each component while achieving multi-wavelength capability through assembly.
Solution Approach 2:
The invention introduces waveguides as intermediary optical channels that transport light from discrete emitters to the output. This mediator allows separate emitters to be spatially distributed and independently fabricated, then combined through the waveguide system to achieve multi-wavelength emission, reducing the complexity and improving reliability of the overall system.
2Adaptability or versatility
If discrete emitters are bonded to waveguide ends, then multiple wavelengths can be propagated, but device complexity increases
Solution Approach 1:
The waveguide structure serves multiple functions: it acts as an optical channel for transporting different wavelengths, provides a mounting platform for multiple discrete emitters, and functions as part of the switching mechanism through its electro-optically active material. This multi-functionality reduces the need for separate components and simplifies the overall device architecture.
Solution Approach 2:
The invention merges the emitter mounting structure with the waveguide itself, eliminating the need for separate mounting hardware. Multiple discrete emitters are directly bonded to the waveguide ends, combining the optical channel and emitter support functions into a single integrated component, thereby reducing device complexity.
3Ease of operation
If electro-optically active waveguides with switches are used, then wavelengths can be redirected by 90 degrees, but manufacturing complexity increases
Solution Approach 1:
The invention replaces mechanical wavelength routing mechanisms with electro-optically controlled waveguides. Instead of physically moving mirrors or prisms to redirect light, the system uses electrical signals to modulate the refractive index of the electro-optically active waveguide material, dynamically steering wavelengths through 90-degree bends via the Pockels effect or similar electro-optic phenomena.
Solution Approach 2:
The invention changes the optical parameters (refractive index) of the waveguide material dynamically through electrical field application. By altering the refractive index distribution in the electro-optically active material, the light propagation path is modified to achieve 90-degree redirection, enabling dynamic wavelength routing without mechanical movement or complex fabrication of fixed optical paths.
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 solution enables the creation of expanded color gamuts with improved pixel light-independence and reduced cross-talk, allowing for more vivid and reliable displays with fewer manufacturing processes, exceeding the color capabilities of current HDTV and NTSC standards.
Implementation Method 1
one or more waveguides made from electro-optically active material; a plurality of different wavelength emitters, the different wavelength emitters disposed at one or more of the ends of the respective one or more waveguides to propagate their respective wavelengths therealong
Implementation Method 2
at least one switch disposed in relation to the one or more waveguides to cause when activated, a shifting of the wavelengths propagating in the one or more waveguides of the pixel assembly by substantially 90 degrees
Data Source
AI summary
An array of pixel assemblies emitting multiple wavelengths in a direction and a method therefor, the array comprising: a plurality of pixel assemblies, each respective pixel assembly having a respective pixel area, the respective pixel assembly formed by: one or more waveguides made from electro-optically active material; a plurality of different wavelength emitters, the different wavelength emitters disposed at one or more of the ends of the respective one or more waveguides to propagate their respective wavelengths therealong and capable of being switched; and a one switch disposed to cause when activated, a shifting of the wavelengths propagating in the one or more waveguides of the pixel assembly by substantially 90 degrees to be emitted through the respective pixel area; and a backplane with an electronic circuit for switching the plurality of switches and the emitters.