Folded Display Base Layer Recess Layout for Narrow Bottom Bezel

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Solution Overview

Problem

The increasing area of the bottom bezel region in display devices due to bending of the base layer, which affects user convenience, is addressed by reducing the bezel size and minimizing bending stress.

Innovation Solution

The display device incorporates a base layer with recesses and reduced thickness in specific curve formation regions, along with a cover layer groove, to minimize bezel area and reduce bending stress.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If the base layer is bent to dispose the driver under the display panel, then the device integration is improved, but the bottom bezel region area increases

Engineering Contradiction:

Improvedevice integrationVSAvoidbottom bezel region area

Core Design Contradiction:

Device complexityVSArea of stationary object

Solution Approach 1:

The base layer is divided into multiple regions with different thicknesses: a first region with reduced thickness in the curve formation area, a second region with normal thickness, and a third region with reduced thickness adjacent to the rear surface region. This segmentation allows the base layer to be bent while minimizing the bottom bezel region area by creating localized thin regions that reduce the overall footprint when bent.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The base layer exhibits non-uniform thickness distribution, with locally reduced thickness in specific regions (first and third regions) while maintaining normal thickness in the second region. This local quality variation enables the base layer to accommodate bending stresses in curve formation regions while preserving structural integrity and minimizing the bottom bezel area.

Inventive Principle:

Principle #3Local quality

2Stress or pressure

If recesses are defined in the base layer, then bending stress is reduced, but manufacturing complexity increases

Engineering Contradiction:

Improvebending stressVSAvoidmanufacturing complexity

Core Design Contradiction:

Stress or pressureVSEase of manufacture

Solution Approach 1:

The base layer thickness parameter is changed in specific regions by forming recesses with different depths (first recess and second recess). These recesses create localized thickness variations that reduce bending stress in curve formation regions. The recesses are formed to specific depth ranges (10-50% of base layer thickness) to optimize stress reduction while maintaining manufacturability through standard thinning processes.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS12518657B2Display device

Publication Date: 2026.01.06 SAMSUNG DISPLAY CO LTD

AI summary

A display device includes a base layer defining a first recess in a first curve formation region, defining a second recess in a second curve formation region spaced apart from the first curve formation region, and including a flat region disposed between the first curve formation region and the second curve formation region, a display panel disposed on a first surface of the base layer in a front surface region that is adjacent to the first curve formation region of the base layer, a driver disposed on the first surface of the base layer in a rear surface region that is adjacent to the second curve formation region of the base layer, and a cover layer disposed between the display panel and the driver on the first surface of the base layer.