Field Emission Light Source with Oriented Carbon Nanotube Anode
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Solution Overview
Problem
Conventional field emission light sources cannot emit polarized light, requiring the use of an additional polarizer and light source for polarized light emission.
Innovation Solution
A field emission light source incorporating a carbon nanotube film structure in the anode layer, where carbon nanotubes are arranged in a preferred orientation to absorb light parallel to them and transmit light normal to them, allowing for direct polarized light emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional field emission light source structure is used, then the device structure is simple, but it cannot emit polarized light
Solution Approach 1:
The patent merges the anode layer and polarizer functions into a single integrated component. The anode layer is constructed with carbon nanotubes arranged in a preferred orientation, which inherently provides both electrical conduction and polarization capabilities. This eliminates the need for a separate polarizer component while achieving polarized light emission.
Solution Approach 2:
The patent uses carbon nanotube film as a composite material structure for the anode layer. The carbon nanotubes are arranged in a preferred orientation to create an anisotropic structure that selectively transmits light polarized parallel to the nanotube alignment direction while absorbing perpendicular polarization, thus providing polarization functionality through material structure rather than adding separate components.
2Adaptability or versatility
If an additional polarizer and light source are used to achieve polarized light emission, then polarized light can be emitted, but the device complexity increases
Solution Approach 1:
The patent merges the anode layer and polarizer functions into a single integrated component. The anode layer is constructed with carbon nanotubes arranged in a preferred orientation, which inherently provides both electrical conduction and polarization capabilities. This eliminates the need for a separate polarizer component while achieving polarized light emission.
Solution Approach 2:
The carbon nanotube-based anode layer serves multiple functions simultaneously: it acts as the electrical anode for field emission, provides structural support, and functions as a polarizer for light emission. This multi-functionality reduces the overall device complexity by eliminating the need for separate dedicated components for each function.
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
Enables the direct emission of polarized light from the field emission light source, improving upon conventional systems by integrating polarization capabilities within the light source itself.
Implementation Method 1
carbon nanotubes are arranged in a preferred orientation to absorb light parallel to them and transmit light normal to them
Implementation Method 2
a light source using the field emission effect is generally named a field emission light source
Data Source
AI summary
A field emission light source includes a substrate, a cathode conductive layer, a plurality of electron emitters, a transparent substrate, an anode layer and a fluorescent layer. The cathode conductive layer is formed on the substrate. The electron emitters are disposed on the cathode conductive layer. The transparent substrate is spaced from the cathode conductive layer. The anode layer is formed on the transparent substrate facing the electron emitters and includes a carbon nanotube film structure having carbon nanotubes arranged in a preferred orientation. The fluorescent layer is formed on the anode layer facing the electron emitters.