Acrylamide Transfer Layer Polarizing Plate for Light Leakage Reduction
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Solution Overview
Problem
Liquid crystal displays experience light loss and light leakage due to the polarizing plate and color filter, and existing wire grid polarizing plates require a planarization layer and are prone to manufacturing errors.
Innovation Solution
A polarizing plate with a polarization film, passivation layer, and a transfer layer including an acrylamide-based compound, which reduces light leakage and simplifies manufacturing by eliminating the need for a planarization layer and laser detachment processes, with the transfer layer positioned between the polarization film and the display panel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a wire grid polarizing plate is used, then light leakage is reduced, but a planarization layer is required and manufacturing complexity increases
Solution Approach 1:
The patent extracts and removes the planarization layer from the structure by using a polarization film with inherent planarization capability, thereby eliminating the need for a separate planarization layer while maintaining light leakage reduction performance
Solution Approach 2:
The patent combines the polarization function and planarization function into a single integrated polarization film structure, eliminating the need for separate planarization layer and reducing manufacturing complexity
2Reliability
If a wire grid polarizing plate is used, then polarization performance is improved, but manufacturing precision requirements increase due to defective patterns
Solution Approach 1:
The patent uses a polarization film made of polyvinyl alcohol or similar materials that can be easily manufactured and replaced, reducing the impact of manufacturing defects compared to precision wire grid structures
Solution Approach 2:
The patent changes the material parameter from rigid wire grid structure to flexible polymer-based polarization film, which is more tolerant to manufacturing variations and less sensitive to pattern defects
3Reliability
If traditional polarizing plate manufacturing is used, then polarization function is achieved, but light loss occurs at the polarizing plate and color filter
Solution Approach 1:
The patent changes the material composition and optical parameters of the polarization film to improve light transmission efficiency, using materials with better optical properties that reduce light loss while maintaining polarization function
Solution Approach 2:
The patent uses composite material structures combining polarization film with specific adhesive layers and barrier films that optimize both polarization performance and light transmission, reducing overall light loss in the display stack
4Reliability
If high temperature curing is used for alignment layer, then alignment performance is improved, but existing polarizing plates may not maintain adhesive properties
Solution Approach 1:
The patent selects adhesive materials with specific thermal parameters that maintain adequate adhesive strength at high curing temperatures (200°C or higher), enabling compatibility with high-temperature alignment layer processing
Solution Approach 2:
The patent uses composite adhesive layer structures with materials specifically selected for high-temperature stability, combining adhesion capability with thermal resistance to maintain bonding during high-temperature curing processes
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 reduces light leakage and simplifies the manufacturing process of liquid crystal displays by using an acrylamide-based transfer layer that maintains adhesive properties at high temperatures and does not require a planarization layer, enhancing the efficiency and cost-effectiveness of display device production.
Implementation Method 1
a transfer layer including an acrylamide-based compound, which reduces light leakage and simplifies manufacturing by eliminating the need for a planarization layer and laser detachment processes, with the transfer layer positioned between the polarization film and the display panel
Implementation Method 2
A polarizing plate includes a polarization film and a transfer layer overlapping the polarization film
Data Source
AI summary
A display device includes a display panel; a color conversion display panel overlapping the display panel; and a polarizing plate positioned between the display panel and the color conversion display panel, wherein the polarizing plate may include a polarization film and a transfer layer overlapping the polarization film, the transfer layer may be positioned between the polarization film and the display panel, and the transfer layer may include an acrylamide-based compound.