Polarizing Plate with Embedded Printed Layer for Curved Displays
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Solution Overview
Problem
Optical displays face issues with glare and glinting between the display and non-display regions due to haze and reflectance differences, and are prone to cracks when curved, especially in the non-display region with a printed layer.
Innovation Solution
A polarizing plate with a compact structure, featuring a polarizer, a bonding layer with an embedded printed layer, and a functional coating layer, which minimizes haze and reflectance differences between the display and non-display regions, and includes a curve securing portion to prevent cracks on curved edges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a printed layer is formed by printing a composition on a window or attaching a separate print tape to a cover window, then the non-display region can be shielded, but the thickness of the optical display increases
Solution Approach 1:
The patent combines the printed layer with the polarizer by directly forming the printed composition on the polarizer surface, merging two previously separate components (polarizer and printed layer) into a single integrated structure, thereby eliminating the need for additional thickness from separate print tapes or cover windows
Solution Approach 2:
The polarizer serves multiple functions: it provides polarization functionality and simultaneously acts as the substrate for the printed layer, allowing the printed layer to be formed directly on it. This multi-functionality reduces the overall structure thickness while maintaining effective light shielding in the non-display region
2Adaptability or versatility
If a functional coating layer is stacked on the protective film of the polarizing plate, then additional functionality is provided, but haze increases in a limited range
Solution Approach 1:
The patent applies the functional coating layer selectively only in the display region rather than uniformly across the entire polarizing plate. This localized application provides the desired functional capabilities (such as anti-reflective or anti-fingerprint properties) where needed while avoiding haze generation in the non-display region where the printed layer is located
3Measurement precision
If the non-display region is shielded to prevent visibility, then screen visibility is improved, but glare or glinting occurs between display and non-display regions
Solution Approach 1:
The patent creates distinct optical properties in different regions: the display region maintains high transparency for optimal screen visibility, while the non-display region incorporates the printed layer with specific optical characteristics that prevent glare and glinting. This localized differentiation of optical properties resolves the contradiction between visibility and glare prevention
4Shape
If the optical display has a curved edge in the non-display region, then aesthetic appearance is improved, but cracks occur in the non-display region
Solution Approach 1:
The patent incorporates a curvature release layer between the polarizer and the printed layer. This layer acts as a cushion that absorbs and releases stress generated by curved edges, preventing crack formation in the non-display region while allowing the aesthetic curved shape to be maintained
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 reduces glare and glinting, enhances screen visibility, and prevents crack formation in the non-display region with a curved edge, while maintaining a thin profile and effective light shielding.
Implementation Method 1
a polarizer
Implementation Method 2
a bonding layer, a first polarizer protective film, and a functional coating layer sequentially stacked on a surface of the polarizer, the bonding layer including a printed layer therein
Data Source
AI summary
A polarizing plate and an optical display including the same are provided. A polarizing plate includes a display region and a non-display region surrounding the display region and includes: a polarizer; and a bonding layer, a first polarizer protective film, and a functional coating layer sequentially stacked on a surface of the polarizer. The bonding layer includes a printed layer therein to correspond to the non-display region. The polarizing plate has a haze of about 0.1% to about 5% as measured on the functional coating layer and a reflectance difference of about 2.4% or less between the display region and the non-display region, or the polarizing plate has a haze of about 20% to about 40% as measured on the functional coating layer and a reflectance difference of about 1.5% or less between the display region and the non-display region.