Touch Device Insulating Layer Structure for Signal Isolation

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

In touch panels, the proximity of internal electrodes to the display panel can interfere with touch signals, leading to weakened sensing capabilities and potential failure of the touch sensing function due to close distances.

Innovation Solution

The implementation of a touch device structure with a first insulating layer, a first sensing electrode layer, and a second sensing electrode layer, where the first sensing electrode layer is disposed between the electrode layer and the second sensing electrode layer, reducing sensing capacitance and maintaining touch sensitivity even with a thin design.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Length of moving object

If the distance between the touch structure and the display panel is reduced for thin design, then the device thickness is decreased, but the internal electrodes of the display panel interfere with the touch signal and weaken the touch sensing function

Engineering Contradiction:

Improvedevice thicknessVSAvoidtouch sensing function

Core Design Contradiction:

Length of moving objectVSReliability

Solution Approach 1:

The patent introduces a first insulating layer between the first sensing electrode layer and the display panel, and a second insulating layer between the second sensing electrode layer and the first sensing electrode layer. These intermediary insulating layers electrically isolate the sensing electrodes from the display panel electrodes, preventing signal interference while enabling thin design. The first insulating layer has a thickness of 0.01-75 micrometers, which is sufficient to block electrical interference but thin enough to maintain overall device thinness.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Length of moving object

If the distance between the touch structure and the display panel is reduced, then the device achieves thin design, but the touch signal is weakened due to electrode interference

Engineering Contradiction:

Improvedistance between touch structure and display panelVSAvoidtouch signal strength

Core Design Contradiction:

Length of moving objectVSMeasurement precision

Solution Approach 1:

The insulating layers act as mediators that allow the sensing electrodes to be positioned close to the display panel (achieving thin design) while preventing electrical interference. The first insulating layer with thickness 0.01-75 micrometers provides sufficient electrical isolation, ensuring that the touch signal strength is maintained despite the reduced distance between the touch structure and display panel.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The touch sensing structure is divided into multiple separate layers: the first sensing electrode layer, the second sensing electrode layer, and multiple insulating layers between them. This segmentation allows each layer to be optimized independently - the sensing electrodes can be positioned close to the display panel for thin design, while the insulating layers ensure signal integrity by preventing interference.

Inventive Principle:

Principle #1Segmentation

3Length of moving object

If the insulating layer thickness is reduced for thin design, then the overall device thickness is decreased, but the internal electrodes may easily affect the touch signal

Engineering Contradiction:

Improveinsulating layer thicknessVSAvoidelectrode interference

Core Design Contradiction:

Length of moving objectVSObject-affected harmful factors

Solution Approach 1:

The patent specifies that the first insulating layer has a thickness of 0.01-75 micrometers, which is an optimized parameter range. This thickness is thin enough to achieve overall device thinness but sufficient to provide the necessary electrical isolation. The parameter optimization ensures that the insulating layer is just thick enough to prevent electrode interference while minimizing its contribution to overall device thickness.

Inventive Principle:

Principle #35Parameter changes

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

This configuration enhances touch sensitivity and flexibility while preventing signal weakening, ensuring the touch sensing function operates effectively even with reduced distances between components.

Implementation Method 1

a first insulating layer, a first sensing electrode layer, a second insulating layer and a second sensing electrode layer. The first sensing electrode layer is disposed on the first insulating layer. The second insulating layer is disposed on the first sensing electrode layer.

Methodology Applied

Scientific EffectElectrical insulation: Dielectric

Data Source

PatentUS9921695B2Touch device

Publication Date: 2018.03.20 HANNSTAR DISPLAY CORP

AI summary

A touch device is provided. The touch device includes a first insulating layer, a first sensing electrode layer, a second insulating layer, and a second sensing electrode layer. The first sensing electrode layer is located on the first insulating layer. The second insulating layer is located on the first sensing electrode layer. The second sensing electrode layer is located on the second insulating layer.