Foldable Display Module Ink Layer for Bending Part Protection

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Solution Overview

Problem

Existing narrow border display devices face low production yield due to issues with BPL adhesive application on bending parts, leading to cracking and adverse effects on the producing process.

Innovation Solution

The use of an ink layer that covers the bending part of the display panel, replacing BPL adhesive, allowing for higher preparation accuracy and protection during bending, thereby simplifying the production process and improving yield.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If BPL adhesive is used on the bending part, then the bending part is protected, but the production yield is low due to cracking and process issues

Engineering Contradiction:

Improveprotection of bending partVSAvoidproduction yield

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent changes the material parameter from BPL adhesive to ink layer, which has different physical and chemical properties. The ink layer can be precisely controlled through micro nozzle printing technology, achieving better preparation accuracy and eliminating the cracking issues that reduce production yield while maintaining protection of the bending part

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent replaces the mechanical adhesive application process with a printing process. Instead of using BPL adhesive that requires complex application and curing processes, the ink layer is directly printed onto the bending part, simplifying the production process and improving efficiency without compromising protection

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Reliability

If BPL adhesive is used on the bending part, then the bending part is protected, but the producing process is adversely affected

Engineering Contradiction:

Improveprotection of bending partVSAvoidproducing process

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent extracts the bending part protection function from the BPL adhesive system and implements it through the ink layer. This separation allows the ink layer to be precisely applied only where needed on the bending part, simplifying the overall production process and eliminating the adverse effects caused by BPL adhesive

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The ink layer serves as a temporary protective layer during the bending process. It can be precisely applied and removed or integrated into the final product structure, replacing the more complex BPL adhesive system with a simpler, more manageable solution that doesn't interfere with subsequent production steps

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

Data Source

PatentUS12493322B2Display module, display device, and method for producing display module

Publication Date: 2025.12.09 WUHAN TIANMA MICRO ELECTRONICS CO LTD

AI summary

A display module, a display device and a method for producing a display module are provided. The display module includes a first part, a second part and a bending part connected between the first part and the second part, where the bending part is bendable to bring the second part to a side of the first part in a thickness direction. The ink layer is arranged on a side of the display panel, and the ink layer covers at least a portion of the first part and at least a portion of the bending part.