Bent Display Substrate Protection Around Opening Boundaries

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Solution Overview

Problem

The manufacturing process of bent display apparatuses is prone to defects, reduces the lifetime of the display apparatus, and increases manufacturing costs.

Innovation Solution

A display apparatus design that includes a substrate with a bending area, a display unit, a protection film with a viscous layer, and bending protection layers, along with a filler to fill the opening, which minimizes defects and reduces manufacturing costs.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the display apparatus is bent to enhance visibility at various angles or reduce non-display area, then visibility and space utilization are improved, but defects occur during manufacturing and lifetime is reduced

Engineering Contradiction:

Improvevisibility at various anglesVSAvoidlifetime of display apparatus

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent applies preliminary action by forming a bending protection layer before the bending process. This protective layer is prepared in advance to prevent defects during manufacturing and usage, thereby resolving the contradiction between achieving bent configuration and maintaining device reliability.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The bending protection layer acts as a cushioning element that protects the display apparatus during bending operations. This beforehand cushioning prevents mechanical damage and reduces defect rates, enabling the device to achieve bent configurations without compromising lifetime.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

2Adaptability or versatility

If the display apparatus is bent to enhance visibility at various angles or reduce non-display area, then visibility and space utilization are improved, but manufacturing cost becomes excessive

Engineering Contradiction:

Improvevisibility at various anglesVSAvoidmanufacturing cost

Core Design Contradiction:

Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

The patent uses a thin film structure for the bending protection layer, which can be easily applied during manufacturing. This thin film approach simplifies the manufacturing process compared to rigid protective structures, thereby reducing manufacturing costs while enabling bent configurations.

Inventive Principle:

Principle #30Flexible shells and thin films

Solution Approach 2:

The patent changes the physical and chemical parameters of the protection layer materials to optimize both protective performance and manufacturability. By selecting materials with appropriate flexibility, adhesion, and durability characteristics, the patent achieves cost-effective manufacturing while maintaining reliability during bending.

Inventive Principle:

Principle #35Parameter changes

3Reliability

If a protection film is applied over the substrate, then protection is provided, but defects occur during the manufacturing process

Engineering Contradiction:

Improveprotection of substrateVSAvoiddefect rate

Core Design Contradiction:

ReliabilityVSManufacturing precision

Solution Approach 1:

The patent segments the protection system into multiple functional layers: a bending protection layer for mechanical protection during bending, and a separate protection film for general substrate protection. This segmentation allows each layer to be optimized for its specific function, reducing defects during manufacturing while maintaining comprehensive protection.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The bending protection layer serves as an intermediary element between the substrate and external mechanical stresses during bending. This intermediary layer absorbs and distributes stress, preventing direct damage to the substrate and reducing manufacturing defects.

Inventive Principle:

Principle #24Intermediary (Mediator)

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 proposed design reduces defect rates and manufacturing costs while maintaining the integrity of the display apparatus, ensuring efficient bending and visibility enhancement.

Implementation Method 1

a protection film located over a lower surface of the substrate and including a protection film base and a viscous layer

Methodology Applied

Scientific EffectViscous layer adhesion: Adhesive

Data Source

PatentUS12575312B2Display apparatus and method of manufacturing the same

Publication Date: 2026.03.10 SAMSUNG DISPLAY CO LTD

AI summary

Provided are a display apparatus and a method of manufacturing the display apparatus. The display apparatus includes: a substrate including a bending area located between a first area and a second area and bent in the bending area; a display unit arranged over an upper surface of the substrate and located in the first area; a protection film located over a lower surface of the substrate and including a protection film base and a viscous layer; and a bending protection layer including a first bending protection layer and a second bending protection layer and corresponding to the bending area, wherein the protection film is located over the lower surface of the substrate and has an opening corresponding to the bending area or at least a part of the first area, and wherein the first bending protection layer is arranged over at least a part of a boundary of the opening or over an outside of the boundary of the opening, and at least a part of the second bending protection layer is arranged over an inside of the boundary of the opening.