Reflective Device Light Conversion Structure Wavelength Efficiency
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Solution Overview
Problem
Existing reflective display devices utilizing Fabry-Perot resonant cavities suffer from low light utilization due to inefficient reflection of incident light across different wavelength ranges, with most wavelengths being absorbed rather than reflected.
Innovation Solution
A reflective device incorporating a resonant cavity with a light conversion structure that converts incident light of a second wavelength range into a first wavelength range, optimizing the placement and material selection of the light conversion structure within the cavity to enhance light reflection efficiency, including the use of down-conversion and up-conversion materials doped with rare earth ions, and anti-reflection films to improve light utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a Fabry-Perot resonant cavity structure is used to achieve light reflection, then the device can reflect light of a specific wavelength range, but the light utilization is low due to inefficient reflection of incident light across different wavelength ranges
Solution Approach 1:
The patent introduces a light conversion structure that changes the wavelength parameter of incident light. The structure converts light from a second wavelength range (outside the resonant cavity's reflection band) into light of a first wavelength range (within the reflection band), enabling the resonant cavity to effectively reflect converted light and improve overall light utilization efficiency
Solution Approach 2:
The light conversion structure acts as an intermediary between incident light and the resonant cavity. It mediates the interaction by converting wavelengths so that light originally outside the cavity's reflection range can be transformed into wavelengths that the cavity can efficiently reflect, thereby resolving the mismatch between incident light spectrum and cavity reflection characteristics
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 significantly increases the reflective efficiency of the device by effectively utilizing incident light across different wavelength ranges, converting non-reflective wavelengths into the desired reflective wavelengths, thereby enhancing light reflectivity and improving display performance.
Implementation Method 1
some reflective display devices utilize a Fabry-Perot resonant cavity structure to achieve light reflection
Implementation Method 2
a light conversion structure disposed within the resonant cavity and configured to convert an incident light of a second wavelength range into the light of the first wavelength range
Data Source
AI summary
The present disclosure relates to a reflective device and a display apparatus. In one embodiment, a reflective device includes: a resonant cavity configured to reflect a light of a first wavelength range; and a light conversion structure disposed within the resonant cavity and configured to convert an incident light of a second wavelength range into the light of the first wavelength range.