Touch Window Dummy Circuit Patterns for Printing Defects

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Solution Overview

Problem

The existing touch window printing technologies suffer from increased line width defects and shot defects in wiring patterns due to frictional forces during the printing process, leading to deteriorated printing quality.

Innovation Solution

Incorporating dummy circuit patterns at the outer angles and bending positions of the wiring patterns, spaced apart from the main wiring parts, to mitigate line width increases and improve printing reliability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If printing is performed directly on wiring sections without dummy patterns, then printing process is simple, but line width increases and shot defects occur due to frictional force

Engineering Contradiction:

Improveprinting process simplicityVSAvoidline width consistency

Core Design Contradiction:

Ease of manufactureVSManufacturing precision

Solution Approach 1:

The patent applies preliminary action by introducing dummy wiring patterns before the actual wiring sections. These dummy patterns are printed first to allow the printing blanket to stabilize and reduce frictional force effects. The dummy patterns serve as a buffer zone that absorbs the initial friction impact, ensuring that when printing reaches the actual wiring sections, the line width remains consistent and defects are minimized.

Inventive Principle:

Principle #10Preliminary action

2Manufacturing precision

If dummy circuit patterns are added to wiring pattern, then printing quality improves, but device structure becomes more complex

Engineering Contradiction:

Improveprinting qualityVSAvoidpattern structure complexity

Core Design Contradiction:

Manufacturing precisionVSDevice complexity

Solution Approach 1:

The dummy wiring patterns function as an intermediary element between the printing process and the actual wiring sections. They mediate the frictional force interaction by providing a sacrificial printing zone that absorbs the harmful effects of initial friction, thereby protecting the main wiring patterns from line width increases and shot defects while maintaining overall printing quality.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Productivity

If printing blanket friction acts on initial wiring lines, then printing process proceeds smoothly, but line width increases and shot defects occur

Engineering Contradiction:

Improveprinting process continuityVSAvoidprinting defect rate

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent converts the harmful frictional force into a beneficial effect by using dummy wiring patterns as a sacrificial zone. The friction that would normally cause line width increases and shot defects is redirected to act on the dummy patterns instead. This transforms the harmful friction into a protective mechanism that shields the actual wiring sections from defects, thereby improving printing reliability without sacrificing process continuity.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

Data Source

PatentUS8963877B2Touch window

Publication Date: 2015.02.24 LG INNOTEK CO LTD

AI summary

Disclosed are a technology capable of improving printing properties and a structure of a touch window manufactured by the same. The touch window according to the present invention comprises: a sensing electrode pattern layer formed on a transparent window and including sensing electrodes which are patterned; and wiring parts connected to the sensing electrodes, wherein the touch window further comprises dummy circuit patterns spaced apart from the wiring parts.