Exhaust Holes in Alignment Terminals for Flexible Display Bubble Removal

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Solution Overview

Problem

Existing flexible displays face issues with bubbles forming between the display panel and the support film during attachment, which affects the performance and accuracy of alignment terminals in subsequent processes.

Innovation Solution

Incorporating exhaust holes within the alignment terminals in the non-display region of the display panel, which act as gas discharge channels to remove bubbles when attaching the support film, ensuring no gas is trapped between the panel and the film.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If the flexible substrate is attached to a support film with certain rigidity, then the flexible substrate is better protected and supported, but bubbles are generated between the display panel and the support film due to insufficient support in the non-display region

Engineering Contradiction:

Improvesupport strengthVSAvoidbubbles

Core Design Contradiction:

StrengthVSObject-affected harmful factors

Solution Approach 1:

The patent applies local quality by creating a rigid support structure specifically in the non-display region where it is most needed, while maintaining flexibility in the display region. The first support film with rigid support columns provides localized rigidity to prevent bubbling during attachment, without affecting the overall flexibility of the display panel.

Inventive Principle:

Principle #3Local quality

2Object-affected harmful factors

If exhaust holes are formed inside the alignment terminals, then bubbles are effectively exhausted, but the alignment terminal structure is modified

Engineering Contradiction:

ImprovebubblesVSAvoidalignment terminal structure

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The alignment terminal is segmented by forming exhaust holes within it, dividing the solid structure into multiple sections. This segmentation allows gas to pass through the alignment terminal during attachment, effectively exhausting bubbles while maintaining the overall alignment function of the terminal structure.

Inventive Principle:

Principle #1Segmentation

3Reliability

If the non-display region provides sufficient support during attachment, then bubbles are prevented, but the film layer structure complexity increases

Engineering Contradiction:

Improveattachment qualityVSAvoidfilm layer structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The first support film acts as an intermediary layer between the flexible substrate and the second support film. It provides the necessary rigid support in the non-display region during attachment through its support columns, facilitating reliable bonding without requiring complex modifications to the main display structure.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS11308828B2Display panel, display module and display device

Publication Date: 2022.04.19 WUHAN CHINA STAR OPTOELECTRONICS SEMICONDUCTOR DISPLAY TECHNOLOGY CO LTD

AI summary

The present application provides a display panel, a display module and a display device. In a non-display region of the display panel, exhaust holes are disposed inside arranging areas of alignment terminals. When attaching a support film in the non-display region, the exhaust holes serve as gas discharge channels to exhaust the gas located in the arranging areas of the alignment terminals and located between the support film and the display panel, thereby alleviating the problem of bubbles between the display panel and the support film in existing flexible displays.