Electro-Conductive Polarizer for LCD Brightness and ESD Protection
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Solution Overview
Problem
Liquid crystal display (LCD) devices face challenges with brightness improvement and high manufacturing costs due to complex processes and high costs associated with dual brightness enhancement films (DBEFs), as well as issues with electrostatic discharge and parasitic capacitance.
Innovation Solution
A display device design featuring a transparent substrate, an insulating layer with through holes, and an electro-conductive polarizer with metal wires and bridges that connect them, forming an equipotential and minimizing parasitic capacitance, thereby preventing electrostatic discharge and reducing manufacturing complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a dual brightness enhancement film (DBEF) is used to improve brightness, then the brightness improvement ratio increases, but the manufacturing complexity and cost increase significantly
Solution Approach 1:
The patent extracts the essential function of the DBEF (brightness enhancement) and implements it using a simpler structure: a reflective polarizing film combined with a brightness enhancement film that has a much reduced number of layers (compared to hundreds of layers in DBEF). This maintains the brightness improvement function while dramatically reducing manufacturing complexity.
Solution Approach 2:
The patent replaces the expensive and complex DBEF with a more economical alternative using standard reflective polarizing films and simplified brightness enhancement structures. This reduces manufacturing cost and complexity while maintaining adequate brightness performance.
2Illumination intensity
If a dual brightness enhancement film (DBEF) is used to improve brightness, then the brightness improvement ratio increases, but the manufacturing cost increases significantly
Solution Approach 1:
The patent replaces the expensive DBEF with cheaper alternative materials and structures, specifically using standard reflective polarizing films and simplified brightness enhancement films, thereby reducing manufacturing cost while maintaining brightness performance.
Solution Approach 2:
The patent separates the brightness enhancement function from the complex DBEF structure and implements it independently, allowing for more cost-effective manufacturing using standard materials and processes.
3Reliability
If an electro-conductive polarizer is introduced to prevent electrostatic discharge, then reliability improves, but parasitic capacitance between gate line and polarizer increases
Solution Approach 1:
The patent introduces an insulating layer as an intermediary between the gate line and the electro-conductive polarizer. This insulating layer prevents direct electrical contact and minimizes parasitic capacitance while still allowing the polarizer to fulfill its electrostatic discharge protection function.
Solution Approach 2:
The patent segments the structure into distinct functional layers: the gate line, an insulating layer, and the electro-conductive polarizer. This segmentation isolates the electrical functions and minimizes unwanted electrical coupling between components.
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 the optical efficiency of LCD devices by preventing defects from electrostatic discharge and minimizing parasitic capacitance, while simplifying the manufacturing process and reducing costs.
Implementation Method 1
The electro-conductive polarizer comprises a plurality of metal wires, which are isolated from one another, and at least one bridge, which electrically connects the metal wires together
Implementation Method 2
A display device capable of preventing defects caused by an electrostatic discharge
Implementation Method 3
capable of minimizing or suppressing the increase of parasitic capacitance between a gate line and an electro-conductive polarizer
Implementation Method 4
a reflective polarizing film (or plate)... may increase the brightness of an LCD device by transmitting light through its stack structure to increase the amount of light transmittance
Implementation Method 5
the DRPF may include a material with a different refractive index from the refractive index thereof, and may thus increase the amount of light transmittance by allowing light to be reflected and refracted by the material
Implementation Method 6
liquid crystal display (LCD) devices are electronic devices that transform electrical information generated from various devices into visual information using the change of the transmittance of liquid crystal layer according to a voltage applied to the liquid crystals
Data Source
AI summary
A display device includes a transparent substrate; a plurality of electro-conductive polarizers disposed on the transparent substrate; an insulating layer disposed on the plurality of electro-conductive polarizers; and a plurality of gate lines disposed on the insulating layer, wherein each of the plurality of electro-conductive polarizers is coupled to each of the plurality of gate lines.