Flexible Display Rigid Pad Support Mounting

Solution Overview

Problem

Flexible display devices face chemical defects due to high-temperature and high-pressure conditions during the mounting of components, particularly in the pad area, which affects the integrity and functionality of the display.

Innovation Solution

A display device design featuring a flexible support part and a rigid support part, where the rigid support part is directly attached to the pad area and has a multi-stage configuration with varying thickness and surface roughness, preventing deformation under high-temperature and high-pressure conditions, and the flexible support part is attached to the main area using an adhesive member.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a flexible support structure is used for the entire display panel, then the display device can be bent and folded, but chemical defects occur during high-temperature and high-pressure mounting processes

Engineering Contradiction:

ImproveflexibilityVSAvoidchemical defect prevention

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The support structure is divided into two distinct segments: a flexible support part for the main area that enables bending, and a rigid support part for the pad area that provides stability during mounting. This segmentation allows each part to perform its specific function without compromising the overall system performance.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different regions of the display panel are assigned different support characteristics: the main area receives flexible support to maintain bendability, while the pad area receives rigid support to prevent chemical defects during high-temperature and high-pressure mounting processes. This local differentiation resolves the contradiction by applying the appropriate property to each specific location.

Inventive Principle:

Principle #3Local quality

2Reliability

If a rigid support structure is used for the entire display panel, then chemical defects are prevented during mounting, but the display device cannot be bent or folded

Engineering Contradiction:

Improvechemical defect preventionVSAvoidflexibility

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The support structure is divided into two distinct segments: a flexible support part for the main area that enables bending, and a rigid support part for the pad area that provides stability during mounting. This segmentation allows each part to perform its specific function without compromising the overall system performance.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different regions of the display panel are assigned different support characteristics: the main area receives flexible support to maintain bendability, while the pad area receives rigid support to prevent chemical defects during high-temperature and high-pressure mounting processes. This local differentiation resolves the contradiction by applying the appropriate property to each specific location.

Inventive Principle:

Principle #3Local quality

3Stability of the object's composition

If the rigid support part has large thickness, then structural stability is improved, but the overall device size and weight increase

Engineering Contradiction:

Improvestructural stabilityVSAvoidsupport part weight

Core Design Contradiction:

Stability of the object's compositionVSWeight of stationary object

Solution Approach 1:

The rigid support part is designed with non-uniform thickness, having a first thickness at the first surface (contacting the pad area) and a second thickness at the second surface, where the first thickness is greater than the second thickness. This gradient thickness design provides maximum structural stability where needed (at the pad area interface) while minimizing overall weight and device size.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

Instead of uniformly increasing thickness in one dimension, the solution varies the thickness in the vertical dimension (from first surface to second surface), creating a three-dimensional gradient structure that optimizes both stability and weight characteristics.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Data Source

PatentUS12057034B2Display device

Publication Date: 2024.08.06 SAMSUNG DISPLAY CO LTD

AI summary

A display device includes a display panel including a main area including a plurality of pixels, a bending area, and a pad area, in order, and each of the main, bending and pad areas including an upper surface, and a lower surface which is opposite to the upper surface, a driving part on the upper surface of the pad area, an adhesive member on the lower surface of the main area, and a lower support body on the lower surface and including a flexible support part facing the lower surface of the main area with the first adhesive member therebetween, and a rigid support part which is directly on the lower surface of the pad area and is less flexible than the flexible support part