Polarizer Edge Exposure Prevention in Display Devices

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

In display devices, the edge of the polarizer positioned inside the printing layer is exposed when viewed obliquely from the outside, leading to potential misrecognition as a defect.

Innovation Solution

A display device configuration where the polarizer is positioned on the resin layer, with its area corresponding to the window, and a printing layer is placed between the polarizer and the window or resin layer to prevent exposure, supported by a surrounding structure with adhesive layers for secure positioning.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If the polarizer is positioned inside the printing layer, then the structure is compact and materials are saved, but the edge of the polarizer is exposed when viewed obliquely from the outside

Engineering Contradiction:

Improvestructural compactnessVSAvoidedge exposure

Core Design Contradiction:

Device complexityVSObject-affected harmful factors

Solution Approach 1:

The patent extends the polarizer area beyond the window boundaries in the lateral dimension, creating an overhang that blocks oblique viewing angles. This dimensional extension transforms the problem from a two-dimensional layering issue to a three-dimensional spatial arrangement, effectively preventing edge exposure without increasing vertical structure complexity

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Solution Approach 2:

The extended polarizer area acts as an intermediary element between the window and the external environment, blocking the line of sight to the polarizer edge when viewed obliquely. This intermediary structure resolves the contradiction by providing visual coverage without requiring additional functional layers

Inventive Principle:

Principle #24Intermediary (Mediator)

2Object-affected harmful factors

If the printing layer is widened to cover the polarizer edge, then the edge exposure is prevented, but the manufacturing precision requirements increase

Engineering Contradiction:

Improveedge exposureVSAvoidalignment precision

Core Design Contradiction:

Object-affected harmful factorsVSManufacturing precision

Solution Approach 1:

Instead of enlarging the printing layer to cover the polarizer edge (conventional approach), the patent inverts the approach by extending the polarizer area beyond the window. This reversal shifts the coverage function from the printing layer to the polarizer itself, reducing the precision burden on the printing layer while maintaining edge coverage

Inventive Principle:

Principle #13The other way round (Inversion)

Solution Approach 2:

The patent extracts the edge coverage function from the printing layer and assigns it to the polarizer structure itself. By separating the coverage function from the printing layer, the manufacturing precision requirements for the printing layer are reduced while the polarizer serves dual purposes: optical function and edge coverage

Inventive Principle:

Principle #2Taking out (Extraction)

Data Source

PatentUS9224979B2Display device and manufacturing method of the same

Publication Date: 2015.12.29 SAMSUNG DISPLAY CO LTD

AI summary

A display device, including: a substrate; a display panel formed on the substrate; a resin layer positioned on the display panel; a polarizer positioned on the resin layer; a window positioned on the polarizer; a first adhesive layer interposed between the window and the polarizer; a printing layer positioned either between the first adhesive layer and the polarizer or between the polarizer and the resin layer; and a supporter surrounding the display panel and the resin layer and supporting the window, in which the printing layer is positioned to correspond to an edge region of the window.