Glass Substrate Side Wirings for Narrow-Bezel Display Reliability

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Solution Overview

Problem

Existing display modules face challenges in minimizing wire disconnection rates, protecting side wirings from external impact, and ensuring stable coupling of side wirings to glass substrates.

Innovation Solution

A display module design that includes a glass substrate with a TFT layer on the front surface and a driving circuit on the rear surface, featuring side wirings that extend from the lateral surface of the glass substrate to an insulating layer, thereby enhancing protection and stability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Area of stationary object

If side wirings are formed on the edge area of glass substrate to minimize bezel area, then the active area is maximized, but the wire disconnection rate increases due to external impact

Engineering Contradiction:

Improveactive areaVSAvoidwire disconnection rate

Core Design Contradiction:

Area of stationary objectVSReliability

Solution Approach 1:

The patent applies beforehand cushioning by forming a protective structure comprising an insulating layer and a protective film over the side wirings before they can be damaged. This protective layer is deposited in advance to cushion against external impacts that may occur during device operation, thereby reducing the wire disconnection rate while maintaining the minimized bezel area design

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

Solution Approach 2:

The patent uses flexible shells and thin films by forming a protective film over the side wirings. This thin film structure provides mechanical protection to the fragile edge-area wirings while maintaining the overall flexibility and thinness of the display module, thus protecting against disconnection without compromising the minimized bezel design

Inventive Principle:

Principle #30Flexible shells and thin films

2Area of stationary object

If side wirings are formed on the edge area of glass substrate, then the bezel area is minimized, but the side wirings are vulnerable to external impact

Engineering Contradiction:

Improvebezel areaVSAvoidexternal impact

Core Design Contradiction:

Area of stationary objectVSObject-affected harmful factors

Solution Approach 1:

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

Solution Approach 2:

The patent uses an intermediary approach by introducing an insulating layer and protective film as intermediary structures between the external environment and the side wirings. These intermediary layers absorb and distribute external impacts, protecting the side wirings from direct damage while allowing the minimized bezel design to be maintained

Inventive Principle:

Principle #24Intermediary (Mediator)

3Area of stationary object

If side wirings are formed on the edge area of glass substrate to maximize active area, then the display area is increased, but the coupling stability between side wirings and glass substrate is reduced

Engineering Contradiction:

Improvedisplay areaVSAvoidcoupling stability

Core Design Contradiction:

Area of stationary objectVSStability of the object's composition

Solution Approach 1:

The patent applies another dimension by extending the side wirings not only along the surface of the glass substrate but also into the vertical dimension by forming them to pass through connection pads and extend into the insulating layer. This multi-dimensional configuration increases the contact area and anchoring points, thereby improving coupling stability while maintaining the maximized display area

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Solution Approach 2:

The patent uses nested doll by having the side wirings nested within the multi-layer structure of connection pads and insulating layers. The side wirings are positioned to pass through and be embedded in these layers, creating a nested configuration that enhances mechanical coupling and stability while preserving the maximized display area

Inventive Principle:

Principle #7Nested doll (Nesting)

Data Source

PatentUS12218148B2Display module having glass substrate formed with side wirings and method for manufacturing same

Publication Date: 2025.02.04 SAMSUNG ELECTRONICS CO LTD

AI summary

Provided is a display module including a glass substrate, a thin film transistor (TFT) layer provided on a front surface of the glass substrate, a driving circuit provided on a rear surface of the glass substrate and configured to drive the TFT layer, a plurality of light emitting diodes (LED) electrically connected to the TFT layer, a plurality of first connection pads provided at intervals in a portion of the front surface of the glass substrate and electrically connected to a TFT circuit provided in in the TFT layer, a plurality of second connection pads provided at intervals in a portion of the rear surface of the glass substrate and electrically connected to the driving circuit, and a plurality of side wirings extending from the lateral surface of the glass substrate to a portion of an insulating layer and extending to another portion of the insulating layer.