Optical Modulation Layer for Display Panel Light Utilization
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Solution Overview
Problem
Conventional display panels with dual-sided light emission designs suffer from light wastage, as a portion of the emitted light is not utilized, particularly when applied to surfaces like glass curtain walls, leading to inefficient light use.
Innovation Solution
A display panel configuration featuring a dual-sided light emitting device layer, an optical modulation layer, and a cover plate layer, where the optical modulation layer, composed of alternating refraction layers with different refractive indices and thicknesses, reflects light emitted from the device layer towards the cover plate, concentrating the light output and minimizing waste.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a dual-sided light emitting device layer is used, then light emission capability is improved, but light wastage increases
Solution Approach 1:
The patent converts the harmful light emission toward the cover plate layer into a beneficial effect by using an optical modulation layer to reflect this light back through the light emitting device layer. The light that would otherwise be wasted is now redirected to contribute to the front surface emission, thereby converting energy loss into useful illumination.
Solution Approach 2:
The optical modulation layer serves as an intermediary between the dual-sided light emitting device layer and the cover plate layer. It mediates the light interaction by selectively reflecting specific wavelength ranges while transmitting others, enabling controlled light redirection without directly modifying the light emitting device structure.
2Loss of energy
If an optical modulation layer with multiple sub-layers is added, then light utilization efficiency is improved, but device complexity increases
Solution Approach 1:
The optical modulation layer is segmented into multiple sub-optical modulation layers, each with different reflectance spectra. This segmentation allows each sub-layer to target specific wavelength ranges for reflection, achieving comprehensive light utilization across the visible spectrum while maintaining a modular structure that simplifies design and manufacturing.
Solution Approach 2:
The patent employs composite material structures within the optical modulation layer, combining multiple materials with different optical properties. Each sub-layer uses composite materials engineered to provide specific reflectance characteristics, enabling precise control over light interaction while integrating multiple functions within a unified layer 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
The solution effectively redirects and concentrates light emitted from the dual-sided light emitting device layer, reducing light wastage by reflecting specific wavelengths and enhancing the display panel's light utilization efficiency, particularly in applications like building facades.
Implementation Method 1
the optical modulation layer is configured to reflect light emitted from the dual-sided light emitting device layer toward the cover plate layer
Implementation Method 2
Each of the sub-optical modulation layers comprises first refraction layers and second refraction layers stacked alternately on one another, in the same one of the sub-optical modulation layers, a refractive index of each of the first refraction layers is different from a refractive index of each of the second refraction layers
Data Source
AI summary
An embodiment of the present invention discloses a display panel and a display device. The display panel includes a dual-sided light emitting device layer, an optical modulation layer, and a cover plate layer. The optical modulation layer is located between the dual-sided light emitting device layer and the cover plate layer. The optical modulation layer is configured to reflect light emitted from the dual-sided light emitting device layer toward the cover plate layer. The present invention disposes the optical modulation layer between the dual-sided light emitting device layer and the cover plate layer to prevent light waste.