Composite Insulating Layer for Display Impact Resistance

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Solution Overview

Problem

Existing display apparatuses lack sufficient robustness and flexibility against external impacts, which can lead to damage and reduced functionality.

Innovation Solution

A display apparatus is designed with a composite layer comprising a first inorganic insulating layer, a first organic insulating layer, and a second inorganic insulating layer, sequentially stacked, to enhance robustness and flexibility. Additionally, an inorganic material layer with openings or grooves is included, filled with an organic material layer, to further absorb and distribute external impacts.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a single-layer insulating structure is used in display apparatus, then the device complexity is low, but the robustness against external impacts is insufficient

Engineering Contradiction:

Improverobustness against external impactsVSAvoidcomposite layer structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent applies composite materials by stacking multiple insulating layers with different material compositions (inorganic and organic layers) to create a composite layer structure. This composite structure provides enhanced robustness against external impacts compared to single-layer structures, while the layers are sequentially arranged to systematically address the protection requirement.

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The patent segments the insulating structure into multiple distinct layers including inorganic insulating layers and organic insulating layers. Each layer serves specific functions in absorbing and distributing external impacts, with the segmentation allowing different material properties to be optimized for different protective roles within the overall structure.

Inventive Principle:

Principle #1Segmentation

2Adaptability or versatility

If the display apparatus is made thinner and lighter, then the portability and versatility improve, but the resistance to external impacts deteriorates

Engineering Contradiction:

Improveusage diversityVSAvoidimpact resistance

Core Design Contradiction:

Adaptability or versatilityVSStrength

Solution Approach 1:

The patent uses composite materials in the composite layer structure, combining inorganic and organic insulating layers to achieve enhanced impact resistance. This composite approach allows the display apparatus to maintain thin and light characteristics while incorporating materials with different mechanical properties that collectively improve strength against external impacts.

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The patent implements beforehand cushioning by incorporating the composite layer structure that is specifically designed to absorb and distribute external impacts before they reach the pixel circuits. The inorganic and organic layers work together to cushion against potential damage, providing protective function in advance of any actual impact event.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

3Reliability

If protective layers are added to improve impact resistance, then the robustness improves, but the device thickness increases

Engineering Contradiction:

Improveimpact resistanceVSAvoiddevice thickness

Core Design Contradiction:

ReliabilityVSLength of stationary object

Solution Approach 1:

The patent employs composite materials that allow for thin-film construction of the protective composite layer. By using multiple thin layers of inorganic and organic materials instead of a single thick layer, the structure achieves adequate impact resistance while minimizing the overall thickness added to the display apparatus.

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The patent segments the protective function into multiple thin insulating layers rather than one thick layer. This segmentation allows each layer to be optimized for specific protective functions while keeping individual layer thicknesses minimal, thereby achieving cumulative protection without significant thickness increase.

Inventive Principle:

Principle #1Segmentation

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 solution significantly improves the display apparatus's ability to withstand external impacts, preventing damage to pixel circuits and ensuring continued functionality, even when subjected to bending or folding.

Implementation Method 1

a composite layer disposed between the pixel circuits and the display elements, the composite layer comprising a first inorganic insulating layer, a first organic insulating layer, and a second inorganic insulating layer, which are sequentially stacked

Methodology Applied

Scientific EffectStress distribution:

Data Source

PatentUS12238977B2Display apparatus

Publication Date: 2025.02.25 SAMSUNG DISPLAY CO LTD

AI summary

A display apparatus including a substrate having a display area, a plurality of pixel circuits arranged in the display area, each of the pixel circuits including a thin-film transistor, a plurality of display elements respectively connected to the pixel circuits, and a composite layer disposed between the pixel circuits and the display elements, the composite layer including a first inorganic insulating layer, a first organic insulating layer, and a second inorganic insulating layer, which are sequentially stacked.