OLED Display Touch Panel Adhesive Tape Frame Connection

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Solution Overview

Problem

Existing OLED display devices with integrated touch panels face challenges in securing the touch panel without increasing the total thickness or causing deformation, while maintaining image brightness and preventing distortion.

Innovation Solution

The OLED display device incorporates a frame covering the side surfaces of the display panel, with an adhesive tape connecting the touch panel to both the frame and the display panel, and a polarizing film between the display and touch panels, ensuring a strong connection without thickness increase and minimizing distortion.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If the touch panel is securely attached to the display panel, then the connection strength is improved, but the total thickness increases

Engineering Contradiction:

Improveconnection strengthVSAvoidtotal thickness

Core Design Contradiction:

StrengthVSLength of stationary object

Solution Approach 1:

The adhesive tape extends not only in the thickness direction but also in the width direction to cover the non-display portion and extend onto the frame. This dimensional extension allows the adhesive to distribute bonding forces over a larger area, achieving strong connection without requiring excessive thickness.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Solution Approach 2:

The adhesive tape is divided into functional regions: a first portion on the non-display portion, a second portion on the display portion, and extensions onto the frame. This segmentation allows each region to contribute differently to the overall bonding strength while maintaining thin profile.

Inventive Principle:

Principle #1Segmentation

2Strength

If the touch panel is securely attached to the display panel, then the connection strength is improved, but deformation of the touch panel occurs

Engineering Contradiction:

Improveconnection strengthVSAvoidtouch panel deformation

Core Design Contradiction:

StrengthVSShape

Solution Approach 1:

The adhesive tape is strategically placed to cover the non-display portion and extend onto the frame, avoiding the display portion where image quality is critical. This local placement provides strong bonding without causing deformation in the touch panel's active areas.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The frame acts as an intermediary structure that supports the adhesive tape and distributes bonding forces, preventing direct stress concentration on the touch panel that would cause deformation.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Strength

If adhesive material is added to connect the touch panel, then the connection strength is improved, but the total thickness increases

Engineering Contradiction:

Improveconnection strengthVSAvoidtotal thickness

Core Design Contradiction:

StrengthVSLength of stationary object

Solution Approach 1:

Instead of increasing adhesive thickness, the adhesive tape is extended in the planar direction to cover the non-display portion and frame. This dimensional redistribution achieves strong bonding through increased bonding area rather than increased bonding thickness.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Data Source

PatentUS8525806B2Organic light emitting diode display device including tough panel

Publication Date: 2013.09.03 SAMSUNG DISPLAY CO LTD

AI summary

An OLED display device includes a display panel configured to display an image, a touch panel on a first surface of the display panel, a frame covering side surfaces of the display panel, and an adhesive tape connecting the touch panel both to the frame and the display panel.