Display Color-Layer Segmentation for Adhesive Air-Bubble Prevention

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Solution Overview

Problem

The thickness of the color layer in display devices can lead to air bubble formation due to insufficient coverage by the adhesive layer, resulting in defects.

Innovation Solution

The display device is designed with a color layer and adhesive layer that do not overlap in a direction perpendicular to the transmission area, featuring a shape corresponding to the display area, with the adhesive layer overlapping the display area and the color layer separated by a minimum distance, and including multiple sub-color layers to prevent air bubble generation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the color layer thickness is increased to realize various colors, then the color display capability is improved, but air bubbles are generated due to insufficient adhesive layer coverage

Engineering Contradiction:

Improvedisplay device reliabilityVSAvoidair bubble generation

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The color layer is divided into multiple sub-color layers (first sub-color layer and second sub-color layer) with different thicknesses and positions. The first sub-color layer is disposed under the window layer while the second sub-color layer is disposed under the first sub-color layer, creating a segmented structure that reduces overall thickness in critical areas while maintaining color display capability.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different regions of the color layer have different thickness characteristics. The first sub-color layer has a first thickness in the transmission area and a second thickness in the bezel area, where the second thickness is greater than the first thickness. This local variation optimizes both color display in the transmission area and adhesive coverage in the bezel area.

Inventive Principle:

Principle #3Local quality

2Reliability

If the color layer thickness is increased to achieve various colors, then color display capability is improved, but adhesive layer coverage becomes insufficient

Engineering Contradiction:

Improvecolor display capabilityVSAvoidadhesive layer coverage area

Core Design Contradiction:

ReliabilityVSArea of stationary object

Solution Approach 1:

The color layer is segmented into multiple sub-color layers with different spatial distributions. The first sub-color layer extends into the bezel area while the second sub-color layer is positioned underneath, creating a stepped configuration that allows the adhesive layer to effectively cover the structure without being overwhelmed by excessive thickness.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The color layer structure transitions from a single-plane thick layer to a multi-layered three-dimensional structure. By stacking sub-color layers at different positions and thicknesses, the invention achieves effective adhesive coverage while maintaining the necessary color display functionality through vertical layering rather than horizontal expansion.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Data Source

PatentUS12443062B2Display device comprising a color layer having a first sub-color layer disposed under a window layer and a second sub-color layer disposed under the first sub-color layer

Publication Date: 2025.10.14 SAMSUNG DISPLAY CO LTD

AI summary

Provided is a display device including a window layer including a transmission area and a bezel area adjacent to the transmission area, a color layer under the bezel area, an adhesive layer under the transmission area, and a display panel under the adhesive layer, wherein the color layer and the adhesive layer may not overlap in a direction perpendicular to the transmission area.