Flexible Polarizer Block Layer Prevents Acid Corrosion

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

The use of polarizers in OLED touch display panels can cause corrosion of metal lines in the touch function layer, leading to touch function failures.

Innovation Solution

A flexible polarizer is designed with a linear polarized layer containing an acidic substance, which is blocked by a block layer to prevent corrosion of metal lines in the touch function layer.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Illumination intensity

If a polarizer is used between the cover plate and the OLED touch display panel to reduce reflectivity, then the reflectivity is reduced, but the acidic substance in the polarizer corrodes the metal lines in the touch function layer, causing touch function failure

Engineering Contradiction:

ImprovereflectivityVSAvoidtouch function reliability

Core Design Contradiction:

Illumination intensityVSReliability

Solution Approach 1:

A block layer made of alkaline substance is introduced as an intermediary between the polarizer and the touch function layer. This block layer neutralizes the acidic substance in the polarizer, preventing corrosion of the metal lines while maintaining the reflectivity reduction function of the polarizer

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent uses a composite structure combining the polarizer with the block layer made of alkaline substance. This composite structure allows the system to simultaneously achieve reflectivity reduction and corrosion prevention by integrating materials with complementary properties

Inventive Principle:

Principle #40Composite materials

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 flexible polarizer effectively reduces reflectivity in OLED touch display panels while preventing corrosion of metal lines, thereby ensuring reliable touch function performance.

Implementation Method 1

a linear polarized layer arranged on a side of the support protection layer

Methodology Applied

Scientific EffectPolarisation: Polarisation

Implementation Method 2

at least one block layer arranged on the side of the linear polarized layer away from the support protection layer, and configured to block the acidic substance in the linear polarized layer from penetrating into a flexible touch display panel bonded with the block layer

Methodology Applied

Scientific EffectDiffusion Barrier: Diffusion Barrier

Data Source

PatentUS20250194389A1Flexible polarizer and flexible touch display device

Publication Date: 2025.06.12 BOE TECHNOLOGY GROUP CO LTD

AI summary

A flexible polarizer and a flexible touch display device. The flexible polarizer includes: a support protective layer; a linear polarized layer provided on the side of the support protection layer and comprising an acidic substance; at least one retardation layer provided on the side of the linear polarized layer distant from the support protection layer, and bonded to the linear polarized layer by means of a first bonding layer; and at least one block layer provided on the side of the linear polarized layer away from the support protection layer, and configured to block the acidic substance in the linear polarized layer from penetrating into a flexible touch display panel bonded with the block layer.