Color Conversion Panel Wire Grid Light Loss Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Liquid crystal displays experience light loss due to the polarization layer and color filter, leading to reduced light emission efficiency.
Innovation Solution
A color conversion display panel is designed with a wire grid pattern and transmission layer on its upper surface, along with a reflection pattern connected to the wire grid pattern, to improve light emission efficiency. The manufacturing method involves forming a transmission layer using a sacrificial pattern, which simplifies the process and ensures a flat upper surface for the color conversion layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a liquid crystal display uses traditional color filters and polarization layers, then color display is achieved, but light loss occurs and light emission efficiency decreases
Solution Approach 1:
The patent removes the traditional color filter layer and replaces it with a color conversion layer that converts blue light to red and green light. This extraction of the color filter eliminates a major source of light absorption and improves overall light emission efficiency while maintaining color display capabilities.
Solution Approach 2:
The patent changes the optical parameters of the display system by introducing a color conversion layer with specific conversion efficiencies (red: 60% or more, green: 70% or more). This parameter change allows for improved light transmission compared to traditional color filters while achieving the required color performance.
2Productivity
If a transmission layer is added to improve light emission efficiency, then light loss is reduced, but the manufacturing process becomes more complex
Solution Approach 1:
The patent combines the transmission layer formation with the color conversion layer manufacturing process by using the same sacrificial pattern removal technique. The transmission layer is formed in the spaces between color conversion patterns, and both layers are created through an integrated process flow, reducing overall manufacturing complexity.
Solution Approach 2:
The patent uses sacrificial patterns that are formed beforehand to define both the color conversion layer regions and the transmission layer regions. These sacrificial patterns are removed after the color conversion materials are deposited, leaving behind the desired transmission layer structure. This preliminary action simplifies the overall manufacturing process by pre-defining the final structure.
3Loss of energy
If wire grid pattern and reflection pattern are added to reduce light loss, then light emission efficiency improves, but device structure becomes more complex
Solution Approach 1:
The wire grid pattern serves multiple functions: it acts as a polarization layer to control light polarization, serves as an electrode structure for the liquid crystal display, and provides a support framework. This multi-functionality reduces the need for separate components and simplifies the overall device structure despite the added functionality.
Solution Approach 2:
The patent introduces a reflection pattern that reflects light that would otherwise be lost or absorbed back into the color conversion layer. This converts the harmful effect of light loss into a beneficial effect by recycling the light and improving overall light emission efficiency. The reflection pattern works synergistically with the color conversion layer to enhance 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 emission efficiency by reducing light loss and simplifying the manufacturing process, resulting in improved display performance.
Implementation Method 1
a wire grid pattern disposed on the color conversion layer and the transmission layer
Implementation Method 2
a reflection pattern connected to a part of the wire grid pattern and disposed between the color conversion layer and the transmission layer disposed adjacent to the color conversion layer
Implementation Method 3
a color conversion layer disposed on the substrate and including at least one of a quantum dot and a phosphor
Data Source
AI summary
A color conversion display panel according to an exemplary embodiment includes a transmission layer disposed on a substrate, a color conversion layer disposed on the substrate and including at least one of a quantum dot and a phosphor, a wire grid pattern disposed on the color conversion layer and the transmission layer, and a reflection pattern connected to a part of the wire grid pattern and disposed between the color conversion layer and the transmission layer disposed adjacent to the color conversion layer.