Quantum Dot Display Panel Low Refractive Layer
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Solution Overview
Problem
Conventional LCD display panels using dye or pigment-based color filters suffer from light absorption, leading to brightness loss and a limited color reproduction range, as they require separate light sources and experience total internal reflection issues at the glass substrate, degrading image quality and efficiency.
Innovation Solution
A display panel with a quantum dot color filter layer and a low refractive layer between the quantum dot filter layer and the glass substrate, along with partition walls and reflective layers, to reduce total internal reflection and improve light recycling and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a glass substrate is used in conventional LCD panels, then structural support and protection are provided, but total internal reflection occurs at the glass substrate interface, causing light loss and degrading image quality
Solution Approach 1:
The patent introduces an intermediary layer with intermediate refractive index between the quantum dot color filter layer and the glass substrate. This intermediate layer acts as a mediator that gradually transitions the refractive index, reducing the abrupt refractive index mismatch that causes total internal reflection. The intermediate layer enables smoother light transmission across the interface, thereby reducing light loss and improving image quality.
2Productivity
If quantum dot color filter layer is used, then color reproduction range and light conversion efficiency are improved, but refractive index mismatch with glass substrate causes total internal reflection and light loss
Solution Approach 1:
The patent introduces an intermediary layer with intermediate refractive index between the quantum dot color filter layer and the glass substrate. This intermediate layer acts as a mediator that gradually transitions the refractive index, reducing the abrupt refractive index mismatch that causes total internal reflection. The intermediate layer enables smoother light transmission across the interface, thereby reducing light loss and improving image quality.
3Productivity
If partition walls are added to partition quantum dot filter layer into color regions, then light recycling efficiency is improved, but device complexity increases
Solution Approach 1:
The patent divides the quantum dot color filter layer into multiple color regions using partition walls. Each partition wall separates different color-converting quantum dot regions, allowing independent optimization of each color channel. This segmentation enables efficient light recycling by confining light within specific color regions and preventing cross-contamination between color channels, thereby improving overall light recycling efficiency.
Solution Approach 2:
The patent applies different properties to different parts of the quantum dot color filter layer by introducing partition walls with specific optical properties (such as reflective or absorptive characteristics) at localized positions. This allows each color region to have optimized light management properties tailored to its specific function, improving light recycling efficiency while maintaining overall system performance.
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 enhances light transmission and reduces total internal reflection, improving image quality and efficiency by converting light colors efficiently and recycling incident light, thereby overcoming the limitations of conventional LCD panels.
Implementation Method 1
a quantum dot color filter layer configured to convert a color of light
Implementation Method 2
a low refractive layer provided between the quantum dot color filter layer and the front substrate, the low refractive layer having a refractive index that is lower than a refractive index of the quantum dot color filter layer
Implementation Method 3
a reflective layer provided at a second side of the quantum dot color filter layer that is opposite to the first side of the quantum dot color layer, the reflective layer being configured to transmit blue light therethrough and reflect light that has a wavelength longer than a wavelength of the blue light
Implementation Method 4
an anti-reflective (AR) layer coated on a surface of the front substrate and configured to prevent Fresnel reflection
Data Source
AI summary
A display panel and display device having the same are provided. The display panel includes a quantum dot color filter layer configured to convert a color of light; a transparent front substrate provided at a first side of the quantum dot color filter layer; and a low refractive layer provided between the quantum dot color filter layer and the front substrate, the low refractive layer having a refractive index that is lower than a refractive index of the quantum dot color filter layer.