Quantum Rod LCD Polarizer Color Filter Integration
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Solution Overview
Problem
Conventional liquid crystal display (LCD) technologies face challenges in reducing manufacturing costs and improving color reproduction rates, particularly due to the need for separate polarizers and color filters, which increase complexity and cost.
Innovation Solution
Incorporating quantum rods that function as both polarizers and color filters, aligned within sub-pixel regions of the LCD, eliminating the need for additional polarizing plates and enhancing light efficiency by using quantum rods to convert and polarize light within the liquid crystal display apparatus.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If separate polarizers and color filters are used in conventional LCDs, then the display can achieve basic color reproduction and polarization functions, but the manufacturing cost increases and the device complexity increases
Solution Approach 1:
The patent combines the polarizer and color filter into a single integrated component. The liquid crystal layer is configured to perform both polarization and color filtering functions simultaneously, eliminating the need for separate polarizing plates and color filter layers that are required in conventional LCD structures. This merging reduces the number of manufacturing steps and component assembly operations.
Solution Approach 2:
The liquid crystal layer is designed to serve multiple functions: it acts as both the polarization control element and the color filter. By tuning the liquid crystal molecules' alignment and optical properties, the same layer that controls light polarization also selectively filters wavelengths to produce color, giving a single component universal functionality that previously required multiple specialized components.
2Productivity
If separate polarizers and color filters are used in conventional LCDs, then the display can achieve basic color reproduction and polarization functions, but the number of components and manufacturing steps increases
Solution Approach 1:
The patent merges the polarizer and color filter into a single integrated liquid crystal layer, reducing the total number of components from multiple separate elements to one unified structure. This consolidation directly decreases the number of assembly steps and manufacturing operations required, thereby improving productivity and manufacturing efficiency.
3Ease of manufacture
If quantum rods are integrated to function as both polarizer and color filter, then manufacturing costs are reduced and device complexity is reduced, but the alignment precision and optical performance must be precisely controlled
Solution Approach 1:
The patent utilizes changes in liquid crystal molecular alignment parameters to achieve both polarization and color filtering. By controlling the orientation angles and molecular configuration of the liquid crystal layer, the system achieves precise optical control without requiring additional alignment layers or complex positioning mechanisms that would increase manufacturing difficulty.
Solution Approach 2:
The liquid crystal layer self-organizes to provide both polarization and color filtering functions through its inherent molecular properties and alignment characteristics. The material's natural response to electric fields and its optical anisotropy automatically establish the required optical functions without needing external alignment structures or additional precision control mechanisms.
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 approach reduces manufacturing costs, improves color reproduction rates, and widens the viewing angle by integrating polarizing and filtering functions within the quantum rods, thereby enhancing display quality and efficiency.
Implementation Method 1
a first light-converter disposed in association with the first sub-pixel region, the first light-converter including a first quantum rod; a second light-converter disposed in association with the second sub-pixel region, the second light-converter including a second quantum rod
Implementation Method 2
forming a liquid crystal layer between the first substrate and the color filter substrate... forming a first material in the first sub-pixel region, the first material including a first quantum rod and liquid crystal... forming a first light-converter, a second light-converter, and a third light-converter by applying voltage to the electrode pattern to align the liquid crystal and long axes of the first quantum rod and the second quantum rod in a same direction
Implementation Method 3
An electric field may be applied to the liquid crystal layer to change an alignment direction of liquid crystal molecules of the liquid crystal layer that, in turn, may be utilized to change the polarization of incident light
Data Source
AI summary
A liquid crystal display apparatus includes a first substrate, a color filter substrate disposed over the first substrate, and a liquid crystal layer disposed between the first substrate and the color filter substrate. The first substrate and the color filter substrate include a first sub-pixel region, a second sub-pixel region, and a third sub-pixel region. The color filter substrate includes: a second substrate facing the first substrate; an electrode pattern disposed over a surface of the second substrate, the surface facing the first substrate; a first light-converter disposed in association with the first sub-pixel region, the first light-converter including a first quantum rod; a second light-converter disposed in association with the second sub-pixel region, the second light-converter including a second quantum rod; and a third light-converter disposed in association with the third sub-pixel region.