Display Panel Sensor-Hole Reinforcement for Crack Prevention

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Solution Overview

Problem

Display devices with sensor holes are vulnerable to external impacts, leading to cracks and reduced rigidity, which can compromise the display area and limit the expansion of the display area due to the need for non-display areas around the sensor holes.

Innovation Solution

Incorporating a reinforcement member, such as a metal or graphite, surrounding the sensor holes to enhance rigidity and prevent cracks, while maintaining or expanding the display area by minimizing the non-display area.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Area of stationary object

If sensor holes are formed in the display panel, then the display area can be expanded, but the rigidity near the sensor hole is reduced and cracks may occur

Engineering Contradiction:

Improvedisplay areaVSAvoidrigidity near sensor hole

Core Design Contradiction:

Area of stationary objectVSStrength

Solution Approach 1:

The patent applies local quality by placing reinforcement members specifically at the sensor hole regions where rigidity is compromised, rather than uniformly reinforcing the entire display panel. This allows the display area to be maximized while providing targeted structural support only where needed to prevent cracks.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent uses composite materials by combining the display panel with reinforcement members made of different materials (such as metal or polymer) that have higher mechanical strength. This composite structure maintains the optical properties of the display panel while adding the necessary rigidity to prevent cracking at sensor hole locations.

Inventive Principle:

Principle #40Composite materials

2Reliability

If non-display area is increased around sensor holes to prevent cracks, then the display area is reduced

Engineering Contradiction:

Improvecrack preventionVSAvoiddisplay area

Core Design Contradiction:

ReliabilityVSArea of stationary object

Solution Approach 1:

The reinforcement members provide localized crack prevention exactly at the sensor hole positions, eliminating the need to create large non-display areas around sensor holes. This allows the display area to extend closer to the sensor holes while maintaining reliability through the targeted reinforcement.

Inventive Principle:

Principle #3Local quality

3Strength

If reinforcement member is added around sensor hole, then rigidity is improved, but device complexity increases

Engineering Contradiction:

Improverigidity near sensor holeVSAvoidstructure complexity

Core Design Contradiction:

StrengthVSDevice complexity

Solution Approach 1:

The patent employs thin film reinforcement members that can be integrated into the existing display panel structure. These thin film structures provide the necessary rigidity without adding significant bulk or complexity to the overall device architecture, maintaining a relatively simple manufacturing process.

Inventive Principle:

Principle #30Flexible shells and thin films

Data Source

PatentUS20250221236A1Display device

Publication Date: 2025.07.03 LG DISPLAY CO LTD

AI summary

A display device includes a display panel including at least one sensor hole, a backplate layer disposed under the display panel, and a first reinforcement member surrounding the at least one sensor hole, wherein the at least one sensor hole passes through the display panel and the backplate layer, and the first reinforcement member is disposed coplanarly with the backplate layer.