Corner Slit Organic Film Layout for Narrow-Bezel Displays

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Solution Overview

Problem

Existing display devices face issues with water ingress through organic films, leading to degradation of display functional characteristics, and forming slits in these films compromises their protective functions, making it difficult to reduce the frame section area.

Innovation Solution

The solution involves forming slits in the organic films at the corners of the display device's substrates, specifically in the insulating and light shielding films, without overlapping the circuit sections, and using inorganic materials to maintain protection and reduce water ingress.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If slits are formed in the organic film to surround the periphery of the display region, then water ingress is reduced, but the protective function of the organic film is compromised and frame section area cannot be reduced

Engineering Contradiction:

Improvewater ingressVSAvoidprotective function

Core Design Contradiction:

Object-affected harmful factorsVSReliability

Solution Approach 1:

The continuous organic film is segmented by forming slits at corner parts, dividing the film into regions that still provide protection while allowing water to be diverted away from critical areas through the slit pathways

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The organic film maintains its protective properties in most areas while locally accommodating slits at corner parts where water ingress is most problematic, creating different functional zones within the same film structure

Inventive Principle:

Principle #3Local quality

2Object-affected harmful factors

If slits are formed in the organic film, then water ingress path length increases, but the organic film cannot perform its protective and light shielding functions in the slit regions

Engineering Contradiction:

Improvewater ingressVSAvoidframe section area

Core Design Contradiction:

Object-affected harmful factorsVSArea of stationary object

Solution Approach 1:

Instead of forming a complete continuous barrier, slits are formed at specific corner parts where water ingress is most likely to occur, providing sufficient water protection through strategic placement rather than complete coverage

Inventive Principle:

Principle #16Partial or excessive action

Solution Approach 2:

The slits extend in the thickness direction of the organic film, creating a three-dimensional water barrier that increases the water ingress path length without necessarily increasing the planar frame section area

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

3Area of stationary object

If the organic film extends to the peripheral edge of the substrate, then coverage is maximized, but water can easily enter via the interface between the organic film and substrate

Engineering Contradiction:

Improveorganic film coverageVSAvoidwater ingress at interface

Core Design Contradiction:

Area of stationary objectVSObject-affected harmful factors

Solution Approach 1:

Slits are formed in advance at corner parts of the organic film before final assembly, pre-positioning water diversion pathways that intercept water before it can reach the substrate interface and proceed inward

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS20250347958A1Display device

Publication Date: 2025.11.13 MAGNOLIA WHITE CORP

AI summary

To improve the display quality of a display device, the display device includes a display section and a frame section surrounding a periphery of the display section. A substrate in the display device includes a conductor pattern constituting a circuit section and an insulating film serving as an organic film covering the conductor pattern. The insulating film extends to a peripheral edge of the substrate. A slit, which penetrates the insulating film in a thickness direction, is formed in a corner part of the insulating film. The slit is formed at a position not overlapping the circuit section.