Quantum Rod Orientation Layer Replaces Polarizer in LCD
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Solution Overview
Problem
Current liquid crystal display devices have low light transmission and utilization of backlighting, resulting in reduced displaying brightness, and high manufacturing costs due to the inefficiency of conventional polarizers.
Innovation Solution
A liquid crystal display device with a quantum rod orientation layer formed through inclined vapor deposition, where quantum rods are aligned parallel to grooves on the substrate, replacing the conventional polarizer to enhance light transmission and utilizing an ultraviolet or blue backlight source to generate polarized light.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional polarizers are used in liquid crystal display devices, then polarization function is achieved, but light transmission rate and backlight utilization are reduced to less than 10%
Solution Approach 1:
The patent changes the physical state and optical properties of the liquid crystal material by introducing quantum rods with specific aspect ratios (length/diameter ratio ≥ 2). These quantum rods are aligned in a specific orientation using an orientation layer, transforming the liquid crystal's optical anisotropy parameters to achieve superior polarization efficiency with higher light transmission compared to conventional polarizers.
Solution Approach 2:
The patent replaces the conventional mechanical polarizer (which absorbs 90%+ of light) with a liquid crystal-based polarization system using quantum rods. This substitution utilizes the optical properties of aligned quantum rods to achieve polarization through selective light transmission rather than absorption, dramatically improving backlight utilization to over 10%.
2Reliability
If conventional polarizers are used, then polarization is achieved, but manufacturing cost increases due to inefficiency
Solution Approach 1:
The patent extracts the polarization function from the conventional polarizer component and transfers it to the liquid crystal layer itself. By removing the need for separate polarizing films and using the liquid crystal material's intrinsic optical properties, the manufacturing process is simplified and costs are reduced while maintaining reliable polarization function.
3Illumination intensity
If quantum rods are used to generate polarized light, then light transmission and backlight utilization are enhanced, but device complexity increases due to additional layers
Solution Approach 1:
The patent merges the polarization function with the liquid crystal layer by incorporating quantum rods directly into the liquid crystal material. This integration eliminates the need for separate polarizing components and combines multiple functions (polarization, light modulation, and color display) into a single layered structure, reducing overall device complexity despite the advanced material used.
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 aligned quantum rod layer improves light transmission and utilization of backlighting, increasing displaying brightness and reducing manufacturing costs by replacing the conventional polarizer, thereby enhancing the overall efficiency of the liquid crystal display device.
Implementation Method 1
an ultraviolet or blue backlight source to generate polarized light
Implementation Method 2
A liquid crystal display device with a quantum rod orientation layer formed through inclined vapor deposition
Data Source
AI summary
The present invention provides a liquid crystal display device and a manufacturing method thereof. The liquid crystal display device uses a quantum rod orientation layer (2) to conduct parallel alignment of a quantum rod layer (3) so that the aligned quantum rod layer (3) may replace a conventional lower polarizer. The liquid crystal display device manufacturing method applies an inclined vapor deposition process to form a quantum rod orientation layer (2). The quantum rod orientation layer (2) includes a plurality of grooves (21) that has an extension direction substantially perpendicular to a transmission axis direction of an upper polarizer (7). A quantum rod layer (3) is then formed on the quantum rod orientation layer (2). The quantum rod layer (3) so formed includes a plurality of quantum rods (31) that has a long axis direction substantially parallel to the extension direction of the grooves (21), namely parallel alignment of the quantum rod layer (3). The aligned quantum rod layer (3) may replace a conventional lower polarizer to improve light transmission rate and utilization of backlighting, increasing displaying brightness and reducing manufacturing cost.