Transparent Display Device Using Quantum Rods to Eliminate Polarizers
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Solution Overview
Problem
Existing transparent LCDs suffer from reduced transparency due to the retention of a color filter layer and polarizers, which affect their display effect.
Innovation Solution
A transparent display device incorporating a liquid crystal mixture layer with quantum rods, where the quantum rods self-illuminate upon receiving light from a backlight module, allowing for control of twist levels and intensity of self-illumination to achieve contrast without the need for polarizers or color filters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If polarizers and color filter layers are retained in transparent LCDs, then color display capability is maintained, but transparency is reduced
Solution Approach 1:
The patent removes the color filter layer and polarizers from the traditional LCD structure, extracting only the essential liquid crystal layer with quantum rods. This extraction eliminates the components that block light and reduce transparency, while quantum rods provide color display through quantum confinement effects without requiring traditional color filters.
Solution Approach 2:
The patent changes the optical parameters of the liquid crystal molecules by introducing quantum rods with specific size parameters (2-20 nm). The quantum rod size controls the emission wavelength through quantum confinement effects, enabling color display without traditional color filters. This parameter change allows the system to achieve both transparency and color display capability.
2Illumination intensity
If quantum rods are added to liquid crystal layer, then transparency and display effect are improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent applies local quality by functionalizing the liquid crystal molecules with specific groups that selectively interact with quantum rods. This functionalization creates local regions with enhanced quantum rod alignment and distribution uniformity, ensuring consistent display performance without requiring extreme manufacturing precision across the entire panel.
Solution Approach 2:
The patent creates a composite material system combining liquid crystal molecules with quantum rods. This composite structure leverages the self-organizing properties of liquid crystals to automatically align quantum rods during the liquid crystal formation process, reducing the need for precise external alignment controls and simplifying manufacturing requirements.
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
This design enhances transparency and visual experience while eliminating the need for polarizers and color filters, reducing processing time and costs, and enabling a normal display with improved light and dark contrast.
Implementation Method 1
the quantum rods receive the light from the backlight module and then self-illuminate
Implementation Method 2
an electric field is used to control the twist of liquid crystals to drive the twist of quantum rods
Data Source
AI summary
A transparent display device includes a first transparent electrode layer, a second transparent electrode layer disposed opposite to the first transparent electrode layer, and a liquid crystal mixture layer disposed between the first transparent electrode layer and the second transparent electrode layer, wherein the liquid crystal mixture layer includes liquid crystal molecules and quantum rods.