Wire Grid Polarizer UV Blocking via Crossed Linear Extensions
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Solution Overview
Problem
Wire grid polarizers in liquid crystal display apparatuses have high ultraviolet (UV) light transmittance, which can deteriorate the characteristics of liquid crystal layers and thin film transistors, necessitating effective UV blocking to maintain display panel integrity.
Innovation Solution
A polarizer structure comprising a base substrate with a polarizing layer of first linear extensions and a UV-blocking layer of second linear extensions, where the first and second extensions cross each other, enhancing UV blocking while maintaining visible light transmittance, is integrated into the display panel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a wire grid polarizer is used to control light transmittance, then polarization performance is improved, but ultraviolet light transmittance increases causing deterioration of liquid crystal layer and thin film transistor
Solution Approach 1:
The patent divides the protective structure into two separate linear extension layers: the first linear extensions (parallel arrangement) for polarization control and the second linear extensions (crossing arrangement) for UV blocking. This segmentation allows each layer to perform its specific function independently, resolving the contradiction between maintaining polarization performance and blocking UV light.
Solution Approach 2:
The patent creates a composite structure by combining two different linear extension patterns (parallel and crossing) in the same polarizer assembly. This composite approach integrates both polarization functionality and UV blocking capability into a single device, eliminating the need for separate components and resolving the transmittance contradiction.
2Object-affected harmful factors
If a UV-blocking layer is added to block ultraviolet light, then protection of liquid crystal layer and thin film transistor is improved, but device structure complexity increases
Solution Approach 1:
The patent merges the UV blocking function with the existing polarizer structure by adding a second linear extension layer that crosses the first linear extensions. This integration allows UV blocking to be achieved within the polarizer assembly itself, avoiding the need for separate UV filtering components and thus minimizing structural complexity.
Solution Approach 2:
The polarizer assembly is designed to perform multiple functions simultaneously: the first linear extensions provide polarization control while the second linear extensions provide UV blocking. This multi-functionality approach allows a single structure to address both optical control and protection needs, reducing overall device complexity.
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 effectively blocks both S and P wave components of UV light, protecting the display panel from external UV radiation while maintaining optical efficiency and visible light transmittance, thereby improving the longevity and performance of the liquid crystal display.
Implementation Method 1
The polarizer may transmit a polarization component parallel to a transmitting axis, and may block a polarization component perpendicular to the transmitting axis.
Implementation Method 2
an ultraviolet (UV)-blocking layer including a plurality of second linear extensions spaced apart from each other, the first linear extensions crossing the second linear extensions
Data Source
AI summary
A polarizer includes a base substrate, a polarizing layer disposed on the base substrate and including a plurality of first linear extensions spaced apart from each other, and an ultraviolet (UV)-blocking layer including a plurality of second linear extensions spaced apart from each other and crossing the first linear extensions. The polarizer may block an external UV light.