Light Emitting Screen with Selective Reflection Layers
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current light emitting screens with laminated blue, green, and red light emitting layers suffer from inadequate color reproducibility and brightness due to excitation light transmission between layers, leading to inefficient light emission.
Innovation Solution
Incorporating selective reflection layers between the light emitting layers to reflect excitation light and prevent it from reaching adjacent layers, thereby enhancing light emission efficiency and brightness, and using quantum rods or dots in the layers to optimize emission spectra.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If excitation light is radiated to light emitting layers, then light emission is achieved, but excitation light transmits through layers causing color contamination and reduced brightness
Solution Approach 1:
A reflective layer is introduced as an intermediary component between the light emitting layers. This reflective layer intercepts and reflects excitation light that has transmitted through the blue light emitting layer, preventing it from reaching the green and red light emitting layers. By placing this intermediary layer at a strategic position, the harmful effect of excitation light transmission is eliminated while maintaining the light emission function of all layers.
Solution Approach 2:
The harmful effect of excitation light transmission is extracted and isolated by introducing a dedicated reflective layer. Instead of allowing the excitation light to naturally transmit through all layers and cause color contamination, the system explicitly separates the excitation light path from the emission light paths by extracting and redirecting the transmitted excitation light at the reflective layer.
2Adaptability or versatility
If multiple light emitting layers are laminated, then full color emission is achieved, but color reproducibility deteriorates due to excitation light affecting adjacent layers
Solution Approach 1:
The reflective layer serves as an intermediary that preserves the integrity of each light emitting layer's color emission. By reflecting excitation light before it reaches adjacent layers, the reflective layer ensures that each layer emits only its designated color without contamination from excitation of neighboring layers, thereby maintaining accurate color reproduction while preserving full color capability.
Solution Approach 2:
The reflective layer is positioned specifically between the blue and green light emitting layers, creating a localized solution to the color contamination problem. This local intervention ensures that the blue layer's excitation light does not contaminate the green and red layers, allowing each layer to maintain its specific color quality and emission characteristics.
3Measurement precision
If quantum rods or dots are used in light emitting layers, then emission spectrum is optimized, but manufacturing complexity increases
Solution Approach 1:
Quantum rods or dots are used to change the emission parameters of the light emitting layers. By utilizing the quantum confinement effect, these nanomaterials enable precise control over emission wavelengths through size and composition adjustments, allowing optimization of the emission spectrum while maintaining compatibility with standard manufacturing processes for displaying devices.
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 improves color reproducibility and brightness by preventing unwanted excitation light absorption and enhancing light emission efficiency, resulting in a more effective light emitting screen.
Implementation Method 1
selective reflection layers that reflect light having a predetermined wavelength are disposed in predetermined positions
Implementation Method 2
the blue light emitting layer, the green light emitting layer, and the red light emitting layer contain quantum rods or quantum dots
Data Source
AI summary
The light emitting screen of the present invention includes: a blue light emitting layer emitting blue light by being excited with first excitation light; a green light emitting layer which is disposed on the blue light emitting layer and emits green light by being excited with second excitation light; a red light emitting layer which is disposed on the green light emitting layer and emits red light by being excited with third excitation light; a first selective reflection layer which is disposed between the blue light emitting layer and the green light emitting layer; and a second selective reflection layer which is disposed between the green light emitting layer and the red light emitting layer, wherein the blue light emitting layer, the green light emitting layer, and the red light emitting layer contain quantum rods or quantum dots.