Display Panel Cut-Line Structure for Crack-Resistant Shaping

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Solution Overview

Problem

Existing display technologies face challenges in manufacturing display panels with personalized shapes and reducing crack formation during cutting, which affects yield and reliability.

Innovation Solution

A display panel design featuring inner and outer cut lines with crack dams and grooves, filled with organic material, and a motherboard structure with intersecting cut lines allows for versatile cutting options to achieve desired shapes while minimizing crack propagation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If multiple cut lines are provided at local positions of motherboard structures to manufacture display panels of different shapes, then manufacturing versatility is improved, but crack formation during cutting increases

Engineering Contradiction:
Improvemanufacturing versatilityVSAvoidcrack formation
Core Design Contradiction:
Adaptability or versatilityVSReliability

Solution Approach 1:

The patent applies preliminary action by pre-configuring crack dams and stress relief grooves in the motherboard structure before cutting operations. These preventive features are built into the rigid substrate during manufacturing, allowing multiple cut lines to be used for different display panel shapes without causing cracks, as the crack dams and grooves proactively mitigate stress concentration at cut line locations.

Inventive Principle:
Principle #10Preliminary action

2Adaptability or versatility

If cut lines are provided for personalized display panel shapes, then adaptability is improved, but manufacturing precision deteriorates due to crack formation

Engineering Contradiction:
Improvepersonalized shape capabilityVSAvoidcutting precision
Core Design Contradiction:
Adaptability or versatilityVSManufacturing precision

Solution Approach 1:

The patent implements preliminary action by pre-forming crack dams and stress relief grooves in the rigid substrate before any cutting operations. These features are integrated into the motherboard structure during manufacturing, enabling precise cutting along multiple possible cut lines for personalized display panel shapes without the risk of crack formation that would compromise cutting precision.

Inventive Principle:
Principle #10Preliminary action

3Adaptability or versatility

If multiple cut lines and crack prevention features are added to the motherboard structure, then manufacturing versatility and reliability are improved, but device complexity increases

Engineering Contradiction:
Improvecutting option versatilityVSAvoidmotherboard structure complexity
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent applies segmentation by dividing the crack prevention mechanism into distinct functional elements: crack dams that block crack propagation and stress relief grooves that reduce stress concentration. These segmented features are strategically placed at specific locations along cut lines in the motherboard structure, providing versatile cutting options while maintaining manageable structural complexity through modular design.

Inventive Principle:
Principle #1Segmentation

Data Source

PatentUS12581832B2Display panel and motherboard structure, display device
Publication Date: 2026.03.17 CHENGDU BOE OPTOELECTRONICS TECH CO LTD
  • US12581832B2 patent drawing
  • US12581832B2 patent drawing
  • US12581832B2 patent drawing

AI summary

The present disclosure provides a display panel (PNL), a motherboard structure, and a display device, and belongs to the field of display technologies. The display panel (PNL) has a display area (AA) and a peripheral area (BB) surrounding the display area (AA); and the peripheral area (BB) has an inner cut line (ICUT) surrounding the display area (AA). The motherboard structure includes a plurality of display panels (PNL), and the motherboard structure has a main cut line (MCUT) between the display panels (PNL). An outer cut line (OCUT) is disposed in at least a partial area between the main cut line (MCUT) and the inner cut line (ICUT) of the display panel (PNL); an end of the outer cut line (OCUT) is intersected with the inner cut line (ICUT); and a second crack dam (DAM2) is disposed between the outer cut line (OCUT) and the inner cut line (ICUT).