Flexible Display Lamination Using Diagonal Pin Alignment

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Solution Overview

Problem

The lamination process for flexible OLED display panels is challenging due to the thin and soft nature of polyimide resin substrates, leading to reduced lamination accuracy and production efficiency.

Innovation Solution

A lamination method and device that utilize diagonally arranged through-holes in both the flexible display screen and lamination plate, with location pins on a rigid substrate, to precisely secure the flexible display screen to the lamination plate using optical adhesive, ensuring accurate alignment and adhesion.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If polyimide resin substrate is used for flexible display screen, then bendability and thinning are achieved, but lamination accuracy deteriorates due to thin and soft properties

Engineering Contradiction:

ImprovebendabilityVSAvoidlamination accuracy

Core Design Contradiction:

Adaptability or versatilityVSManufacturing precision

Solution Approach 1:

A lamination plate is introduced as an intermediary component between the flexible display screen and the bonding process. The plate provides a rigid structure with through-holes that guide location pins, enabling precise positioning and lamination of the flexible substrate without directly manipulating the soft polyimide material itself.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent replaces direct mechanical handling and alignment of the flexible substrate with a pin-through-hole mechanical guidance system. Location pins passing through aligned holes in the lamination plate and substrate provide precise positional control, substituting complex mechanical alignment operations with a simpler pin-based positioning mechanism.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Weight of moving object

If polyimide resin substrate is used for flexible display screen, then lightening and thinning are achieved, but lamination accuracy deteriorates due to thin and soft properties

Engineering Contradiction:

ImproveweightVSAvoidlamination accuracy

Core Design Contradiction:

Weight of moving objectVSManufacturing precision

Solution Approach 1:

The lamination plate serves as a mediator that compensates for the lightweight and thin properties of the polyimide substrate. By providing a separate rigid structure with precisely positioned through-holes, the system achieves accurate lamination positioning without relying on the mechanical stability of the lightweight substrate itself.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Device complexity

If conventional lamination process is used for flexible display screen, then production simplicity is maintained, but production efficiency decreases due to lamination accuracy issues

Engineering Contradiction:

Improveprocess complexityVSAvoidproduction efficiency

Core Design Contradiction:

Device complexityVSProductivity

Solution Approach 1:

The lamination plate is prepared in advance with precisely positioned through-holes that correspond to the location pin positions. This preliminary preparation of the positioning structure eliminates the need for complex real-time alignment operations during the lamination process, thereby improving production efficiency while maintaining process simplicity.

Inventive Principle:

Principle #10Preliminary action

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

This method enhances lamination accuracy and significantly improves production efficiency by securely attaching the flexible display screen to the lamination plate, reducing operational difficulties.

Implementation Method 1

the flexible back plate is disposed on the foam plate and adhesively secured to the foam plate via optical adhesive

Methodology Applied

Scientific EffectOptical adhesive: Adhesive

Data Source

PatentUS10515885B2Method of fabricating a flexible display screen having substrate with a plurality of pins inserted in the through holes of lamination plate

Publication Date: 2019.12.24 WUHAN CHINA STAR OPTOELECTRONICS SEMICONDUCTOR DISPLAY TECHNOLOGY CO LTD

AI summary

The disclosure provides a lamination method for a flexible display screen, including: providing a flexible display screen, the flexible display screen including two first through-holes located in a non-display region thereof and arranged diagonally; providing a flexible lamination plate, the flexible lamination plate including two second through-holes, and the two second through-holes arranged diagonally; providing a lamination device, the lamination device including a rigid substrate and two location pins located on the rigid substrate, and the two location pin arranged diagonally; disposing the flexible lamination plate on the rigid substrate and allowing the two location pins to penetrate the two second through-holes, respectively; disposing the flexible display screen on the flexible lamination plate and allowing the two location pins to also penetrate the two first through-holes, respectively, thereby laminating the flexible display screen and the flexible lamination plate together.