Wavelength Conversion Substrate Plasmon Resonance Energy Efficiency
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Solution Overview
Problem
The existing liquid-crystal elements face challenges in achieving high-intensity emitted light and energy efficiency, particularly when transmitting light of a specific wavelength band, due to energy loss as heat within metallic nanostructures.
Innovation Solution
A wavelength conversion substrate is designed with metallic structures that exhibit plasmon resonance and wavelength conversion units adjacent to them, utilizing materials like gold, silver, or aluminum, where the resonance wavelength aligns with the absorption spectrum of the wavelength converting material, enhancing light emission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If metallic nanostructures are used to transmit light of a specific wavelength band, then wavelength selectivity is improved, but energy efficiency deteriorates due to heat loss
Solution Approach 1:
A wavelength converting material is introduced as an intermediary between the metallic nanostructure and the external environment. The metallic structure absorbs incident light and converts it to a different wavelength through the wavelength converting material, which then emits light at the desired wavelength. This mediator approach allows the metallic structure to operate at its resonant wavelength while the output is at a different wavelength, solving the energy loss problem.
Solution Approach 2:
The patent converts the harmful heat energy that was previously lost into useful light emission. By placing wavelength converting material adjacent to the metallic nanostructure, the energy that would have been dissipated as heat is instead converted into emitted light at a different wavelength, transforming an energy loss into a beneficial output.
2Measurement precision
If metallic nanostructures are used to transmit light of a specific wavelength band, then wavelength selectivity is improved, but emitted light intensity deteriorates
Solution Approach 1:
The wavelength converting material serves as a mediator that receives energy from the metallic nanostructure and re-emits it as light. This two-step process (absorption by metal, conversion, then emission by wavelength converting material) enables high-intensity emitted light while maintaining wavelength selectivity, as the emission intensity is determined by the conversion efficiency of the wavelength converting material rather than the transmission characteristics of the metallic structure.
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 configuration enables liquid-crystal elements to produce high-intensity light with improved energy efficiency by converting absorbed energy into emitted light, overcoming previous energy loss issues.
Implementation Method 1
a plurality of metallic structures periodically provided at intervals from one another on one surface of the first substrate and configured to exhibit plasmon resonance due to incident light
Implementation Method 2
a plurality of wavelength conversion units provided so that at least some wavelength conversion units are adjacent to the plurality of metallic structures and including a wavelength converting material configured to emit light in a wavelength band different from a wavelength band of the incident light
Data Source
AI summary
A wavelength conversion substrate according to one aspect of the present invention includes: a first substrate having an optical transparency; and a light modulation unit provided on one surface of the first substrate and configured to modulate a spectrum of incident light in accordance with a polarization state of the incident light. The light modulation unit includes: a plurality of metallic structures periodically provided at intervals from one another on one surface of the first substrate and configured to exhibit plasmon resonance due to incident light; and a plurality of wavelength conversion units provided so that at least some wavelength conversion units are adjacent to the plurality of metallic structures and comprising a wavelength converting material configured to emit light in a wavelength band different from a wavelength band of the incident light.