Liquid Crystal Capsule Display on Nano-Grooves
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Solution Overview
Problem
Existing liquid crystal display devices with color filter layers face reduced transmittance and complex fabrication processes, and plasmon LCD devices with nano-sized periodic patterns have alignment issues and slow response speeds due to high refractive index liquid crystals.
Innovation Solution
A liquid crystal display device with a liquid crystal capsule layer formed on nano-sized grooves, eliminating the need for additional alignment layers and simplifying the fabrication process, while controlling the wavelength band of reflected light through dielectric constant changes in the liquid crystal molecules, thereby enhancing response speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a color filter layer is used to display color images, then color reproduction is achieved, but transmittance is reduced and fabrication process becomes complicated
Solution Approach 1:
The invention extracts and removes the color filter layer from the LCD structure, replacing it with a plasmon resonance-based color generation mechanism using a metallic layer with nano-sized periodic patterns. This eliminates the harmful color filter layer while preserving color display functionality through surface plasmon resonance effects.
Solution Approach 2:
The invention replaces the mechanical/optical system of color filter layers with a electromagnetic field-based plasmon resonance system. The metallic layer with periodic nanostructures generates color through surface plasmon resonance, substituting the traditional color filter mechanism with a field-based approach that improves transmittance and simplifies fabrication.
2Reliability
If alignment layers are added to the plasmon LCD device, then liquid crystal alignment is improved, but fabrication process becomes more complex
Solution Approach 1:
The invention enables the liquid crystal layer to self-align through the periodic nanostructures of the metallic layer. The plasmon resonance structure itself provides the alignment function, eliminating the need for separate alignment layers. The nanostructured metal layer serves dual purposes: color generation and liquid crystal alignment.
Solution Approach 2:
The invention merges the color generation function and liquid crystal alignment function into a single metallic layer with periodic nanostructures. This layer simultaneously generates surface plasmon resonance for color display and provides the periodic pattern necessary for liquid crystal alignment, reducing device complexity.
3Manufacturing precision
If high refractive index liquid crystals are used in plasmon LCD, then color display is enhanced, but response speed decreases
Solution Approach 1:
The invention changes the refractive index parameter of the liquid crystal material, selecting liquid crystals with lower refractive indices (typically 1.3-1.6) instead of traditional high refractive index materials. This parameter change maintains color display quality through plasmon resonance while significantly improving response speed by reducing the optical path difference.
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
Simplifies the fabrication process, reduces alignment issues, and increases response speed by controlling the wavelength band of reflected light, leading to improved color image display with reduced fabrication costs.
Implementation Method 1
A second light L2 of a wavelength band other than a specific wavelength is selectively reflected due to a coupling of an electric field of the incident light within a wavelength band of a visible ray to a wavelength band of a near infrared ray and the plasmon.
Implementation Method 2
The LCD device displays an image using an optical anisotropy and a polarization property of a liquid crystal molecule.
Implementation Method 3
The LCD device displays an image using an optical anisotropy and a polarization property of a liquid crystal molecule.
Implementation Method 4
a liquid crystal layer including a plurality of liquid crystal capsules on the grooves
Data Source
AI summary
A liquid crystal display device is disclosed. The liquid crystal display device includes a first substrate, and a plurality of grooves periodically spaced apart from each other over the first substrate. The liquid crystal display device also includes a pixel electrode and a common electrode spaced apart from each other over the first substrate, and a liquid crystal layer including a plurality of liquid crystal capsules on the grooves.