3D Sensing Panel Coating Eliminates Adhesive Layers

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Conventional three-dimensional touch-pressure integrated panels require additional manufacturing processes and costs due to the need for adhesive and extra components, which complicates integration with existing manufacturing processes and increases thickness and cost.

Innovation Solution

A three-dimensional sensing panel design that includes a cover plate, a two-dimensional touch sensing module, a pressure sensing coating layer, and a light-transmitting electrode layer, where the pressure sensing coating layer and light-transmitting electrode layer are sequentially formed on the touch module using coating processes, eliminating the need for adhesive and reducing thickness and manufacturing costs.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the pressure sensor is mounted above or below the two-dimensional touch panel using conventional methods, then the three-dimensional sensing function is achieved, but additional adhesive and transparent films are required, increasing device complexity and manufacturing cost

Engineering Contradiction:

Improvethree-dimensional sensing functionVSAvoidadditional adhesive and transparent film layers

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The pressure sensing coating layer is directly formed on the two-dimensional touch sensing module through coating process, merging the pressure sensing function with the existing touch panel structure. This eliminates the need for separate pressure sensors, adhesive layers, and transparent protective films, thereby reducing device complexity while maintaining three-dimensional sensing capability

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The pressure sensing function is extracted from conventional separate pressure sensors and implemented through a coating layer formed directly on the touch sensing module. This extraction eliminates the need for additional mounting components and integrates the pressure sensing function into the existing panel structure

Inventive Principle:

Principle #2Taking out (Extraction)

2Reliability

If the pressure sensor is mounted using conventional methods, then pressure sensing is achieved, but additional manufacturing processes and adhesive materials are required, increasing manufacturing cost

Engineering Contradiction:

Improvepressure sensing capabilityVSAvoidmanufacturing process complexity and cost

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The pressure sensing coating layer is formed directly on the two-dimensional touch sensing module using coating and drying processes, merging the pressure sensing manufacturing into the existing touch panel production line. This eliminates separate pressure sensor mounting processes and reduces manufacturing cost

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The mechanical mounting process of conventional pressure sensors is replaced by a coating process that directly forms the pressure sensing layer on the touch panel. This substitution eliminates the need for adhesive application, drying, and mechanical assembly steps, simplifying the manufacturing process

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Reliability

If additional adhesive and transparent films are used to mount the pressure sensor, then the pressure sensor is protected and positioned, but the overall thickness of the panel increases

Engineering Contradiction:

Improvepressure sensor protection and positioningVSAvoidoverall panel thickness

Core Design Contradiction:

ReliabilityVSLength of stationary object

Solution Approach 1:

The pressure sensing coating layer is formed directly on the touch sensing module, merging the pressure sensing function into the existing panel thickness. This eliminates additional adhesive layers and transparent protective films, thereby reducing the overall panel thickness while maintaining pressure sensor protection and positioning

Inventive Principle:

Principle #5Merging (Combining)

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 design reduces overall thickness and manufacturing costs while providing excellent signal conduction characteristics and efficient force signal extraction, improving the integration and performance of three-dimensional sensing panels.

Implementation Method 1

The pressure sensing coating layer is coated at a side of the two-dimensional touch sensing module away from the cover plate

Methodology Applied

Scientific EffectPiezoelectric effect: Piezoelectric Effect

Implementation Method 2

The light-transmitting electrode layer is coated at a side of the pressure sensing coating layer away from the two-dimensional touch sensing module

Methodology Applied

Scientific EffectElectrical conduction: Conduction (electrical)

Data Source

PatentUS20220075468A1Three-dimensional sensing panel and method of manufacturing the same and electronic apparatus

Publication Date: 2022.03.10 TPK ADVANCED SOLUTIONS

AI summary

A three-dimensional sensing panel includes a cover plate, a two-dimensional touch sensing module, a pressure sensing coating layer, and a light-transmitting electrode layer. The cover plate defines thereon a touch area and a peripheral area surrounding the touch area. The two-dimensional touch sensing module is disposed at the touch area. The pressure sensing coating layer is coated at a side of the two-dimensional touch sensing module away from the cover plate. The light-transmitting electrode layer is coated at a side of the pressure sensing coating layer away from the two-dimensional touch sensing module.