Polarizing Plate with Embedded Printed Layer for Curved Displays

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Solution Overview

Problem

Conventional polarizing plates for optical displays do not effectively prevent elements in non-display regions from being visible and can crack when applied to curved edges, leading to degradation in display quality and increased thickness.

Innovation Solution

A polarizing plate design incorporating a printed layer embedded within a bonding layer, featuring a curve securing portion to prevent cracking at curved edges and reduce thickness by integrating light shielding and aesthetic features directly onto the polarizing film or protective film.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If a printed layer is added to prevent elements in non-display region from being visible, then light shielding performance is improved, but device thickness increases

Engineering Contradiction:

Improvelight shielding performanceVSAvoiddevice thickness

Core Design Contradiction:

Object-affected harmful factorsVSLength of stationary object

Solution Approach 1:

The patent combines the printed layer with the bonding layer into a single integrated structure. The printed layer is embedded within the bonding layer rather than being a separate additional layer, thus achieving light shielding functionality without increasing overall device thickness. This merging of functions resolves the contradiction between improving light shielding and maintaining thin profile.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The printed layer is nested within the bonding layer, with the printed layer being embedded in the bonding layer. This nesting arrangement allows the printed layer to utilize the space already allocated for the bonding layer, preventing additional thickness while maintaining the light shielding function.

Inventive Principle:

Principle #7Nested doll (Nesting)

2Shape

If a printed layer is added to conceal non-display region elements, then aesthetic appearance is improved, but device complexity increases

Engineering Contradiction:

Improveaesthetic appearanceVSAvoidstructure complexity

Core Design Contradiction:

ShapeVSDevice complexity

Solution Approach 1:

By merging the printed layer with the bonding layer into a single integrated component, the patent reduces the number of separate parts and assembly steps. The printed layer and bonding layer form a unified structure that is applied as one unit, thereby improving aesthetic appearance while minimizing the increase in device complexity.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The bonding layer serves multiple functions: it provides structural bonding between components and simultaneously contains the printed layer for aesthetic purposes. This multi-functionality reduces the need for separate dedicated aesthetic components, thereby improving appearance while controlling overall device complexity.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Adaptability or versatility

If the polarizing plate is applied to curved distal ends, then adaptability is improved, but crack generation occurs

Engineering Contradiction:

Improveadaptability to curved surfacesVSAvoidcrack resistance

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent modifies the physical and chemical parameters of the bonding layer to enhance its flexibility and adhesion. By adjusting the composition and properties of the bonding layer, it can accommodate curved surfaces without cracking, thus improving adaptability while maintaining reliability.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The bonding layer is formulated as a composite material that combines flexibility with structural integrity. This composite structure allows the polarizing plate to be applied to curved distal ends without generating cracks, resolving the contradiction between adaptability and crack resistance.

Inventive Principle:

Principle #40Composite materials

4Length of stationary object

If the printed layer is embedded in the bonding layer, then device thickness is reduced, but manufacturing precision requirements increase

Engineering Contradiction:

Improvedevice thicknessVSAvoidembedding precision

Core Design Contradiction:

Length of stationary objectVSManufacturing precision

Solution Approach 1:

The printed layer is prepared and positioned within the bonding layer before the bonding layer is fully cured or set. This preliminary action allows for easier adjustment and precise positioning of the printed layer within the bonding layer, reducing the final manufacturing precision requirements while achieving the thickness reduction goal.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS11681179B2Polarizing plate and optical display device comprising same

Publication Date: 2023.06.20 HOARDSUN HENGXIN(WUXI) MATERIALS CO LTD

AI summary

Provided are a polarizing plate and a display device comprising the same, the polarizing plate comprising: a polarizing film; a polarizing film protection film arranged on at least one surface of the polarizing film; an adhesive layer interposed between the polarizing film and the polarizing film protection film; and a printing layer impregnated in the adhesive layer and formed on at least part of the edge of the adhesive layer, wherein a curve ensuring portion is formed on at least one surface of the printing layer.