Patterned Polarizer for Display Light Leakage Control
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Solution Overview
Problem
Traditional polyvinyl alcohol (PVA) iodine-based polarizers are inflexible and thick, making them unsuitable for in-cell or patterned designs in modern display technologies, leading to issues with light leakage and mixing in display panels.
Innovation Solution
A polarizer with a composite layer including dichroic dye and liquid crystal mixture, featuring light-transmitting and non-light-transmitting regions, where the alignment layer is only on the protrusions of a substrate with grooves, allowing for thinner construction and improved light management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If traditional PVA iodine-based polarizers are used, then light shielding effect is improved, but polarizer thickness increases and flexibility deteriorates
Solution Approach 1:
The polarizer is divided into light-transmitting regions and non-light-transmitting regions, with the non-light-transmitting regions forming isolated islands rather than continuous thick structures. This segmentation allows light shielding functionality to be achieved through distributed regions rather than uniform thickness increase.
Solution Approach 2:
The polarizer uses a composite structure combining PVA iodine-based polarizing material with liquid crystal layers and dichroic dye layers. This composite approach enables light shielding through multiple mechanisms (polarization, liquid crystal orientation, and dye absorption) rather than relying solely on increased thickness.
2Object-affected harmful factors
If black matrix is thickened to improve light leakage and light mixing, then light shielding is improved, but display device thickness increases
Solution Approach 1:
The black matrix functionality is segmented into discrete non-light-transmitting regions within the polarizer structure. These regions are distributed throughout the polarizer thickness and separated by light-transmitting areas, achieving light mixing prevention without requiring a single continuous thick black matrix layer.
Solution Approach 2:
Light shielding is achieved by distributing non-light-transmitting regions throughout the thickness dimension of the polarizer rather than concentrating shielding material in a single plane. This three-dimensional distribution of shielding regions prevents light mixing while maintaining overall device thinness.
3Object-affected harmful factors
If polarizer thickness is increased to improve light shielding, then light leakage prevention is improved, but manufacturing complexity and cost increase
Solution Approach 1:
The patent merges the light shielding function with the polarizer structure itself by integrating non-light-transmitting regions directly into the polarizer layers. This eliminates the need for separate black matrix components and reduces overall structural complexity despite enhanced light shielding capability.
Solution Approach 2:
The polarizer structure serves multiple functions simultaneously: polarization, light shielding, and light mixing prevention. The same light-transmitting and non-light-transmitting regions that provide polarization also prevent light leakage and mixing, reducing the need for additional dedicated 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
This solution enables the thinning or elimination of the black matrix, enhances light transmission in display regions, and provides effective light shielding in non-display regions, simplifying manufacturing and reducing costs.
Implementation Method 1
The polarizer main body is a composite layer including a dichroic dye and a liquid crystal mixture
Implementation Method 2
The polarizer main body is a composite layer including a dichroic dye and a liquid crystal mixture
Implementation Method 3
The alignment layer includes alignment regions corresponding to the light-transmitting regions
Data Source
AI summary
The present application discloses a polarizer, a manufacturing method thereof, and a display device. The polarizer includes an alignment layer and a polarizer main body disposed on a side surface of the alignment layer. The polarizer main body includes a plurality of light-transmitting regions distributed on the polarizer main body at intervals and a non-light-transmitting region surrounding the light-transmitting regions. The alignment layer includes alignment regions corresponding to the light-transmitting regions and a non-alignment region corresponding to the non-light-transmitting region.