Nano-crystalline Color Conversion Panel for Curved Displays
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Liquid crystal displays experience light loss due to polarizers and color filters, necessitating a solution for reduced light loss and improved efficiency, especially in curved display devices where misalignment and color mixture can occur.
Innovation Solution
A display device incorporating a color conversion panel with a nano-crystalline semiconductor and transmission layer, combined with a display panel featuring thin film transistors and substrates of varying thicknesses, along with polarizers and a blue light cutting filter, to enhance color reproducibility and prevent misalignment in curved designs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a conventional liquid crystal display with polarizers and color filters is used, then light loss occurs, but using a color conversion panel with nano-crystalline semiconductor reduces light loss and improves efficiency
Solution Approach 1:
The patent removes the color filter layer from the conventional liquid crystal display structure and replaces it with a color conversion panel containing nano-crystalline semiconductors. This extraction of the color filter eliminates the primary source of light absorption while the color conversion layer generates colors through photoluminescence, thereby reducing light loss and improving display efficiency.
Solution Approach 2:
The patent changes the optical parameters of the display system by introducing nano-crystalline semiconductors with specific bandgap energies that convert blue light into red and green wavelengths through photoluminescence. This parameter change in light wavelength conversion enables color generation without the light-absorbing color filters, reducing overall light loss in the display system.
2Length of moving object
If substrates of different thicknesses are used in the display panel, then the overall device thickness is reduced, but manufacturing precision requirements increase
Solution Approach 1:
The patent divides the display panel into multiple substrate layers (first substrate, second substrate, third substrate) with different thicknesses optimized for their specific functions. The first substrate near the color conversion panel is made thinner to reduce overall thickness, while other substrates maintain appropriate thickness for structural support and manufacturing feasibility, achieving a balance between thinness and manufacturability.
Solution Approach 2:
The patent applies different thickness specifications to different substrate regions based on their functional requirements. The first substrate adjacent to the color conversion panel uses a thickness of 0.03-0.07mm to minimize overall device thickness, while other substrates use thicker specifications for structural stability. This local differentiation of quality parameters enables thickness reduction without compromising overall device integrity.
3Adaptability or versatility
If the display device is designed to be curved, then viewing angle is improved, but misalignment and color mixture occur
Solution Approach 1:
The patent incorporates a curvature compensation layer between the substrates that is pre-designed to counteract the effects of curving the display. This preliminary structural arrangement ensures that when the display is bent, the color conversion panel and other layers remain properly aligned, preventing color mixture and maintaining manufacturing precision even in curved configurations.
Solution Approach 2:
The patent uses composite material structures including flexible substrates and curvature compensation layers with specific mechanical properties that enable the display to maintain alignment during curving. The composite structure combines materials with different flexibility and dimensional stability characteristics to prevent misalignment while allowing the display to achieve curved shapes for improved viewing angles.
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 reduces the thickness and weight of the display device, stabilizes polarizer formation, prevents misalignment, and controls color mixture, thereby improving reliability and display quality, including enhanced color purity and viewing angle.
Implementation Method 1
the color conversion layer includes first and second quantum dot layers交替 stacked, wherein the first quantum dot layer includes red-emitting quantum dots and the second quantum dot layer includes green-emitting quantum dots
Implementation Method 2
a liquid crystal layer disposed between the first display panel and the second display panel
Implementation Method 3
a first polarizer disposed between the display panel and the color conversion panel, and a second polarizer disposed between the display panel and the light unit
Data Source
AI summary
A display device according to the present disclosure includes: a color conversion panel; and a display panel overlapping the color conversion panel, wherein the color conversion panel includes a color conversion layer including a nano-crystalline semiconductor and a transmission layer, the display panel includes a first display panel including a first substrate and a thin film transistor disposed on the first substrate, a second display panel including a second substrate and overlapping the first display panel. The first substrate and the second substrate have different thicknesses.