Integrated Touch Panel for Simultaneous Finger and Stylus Detection

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Solution Overview

Problem

Conventional touch panels struggle to simultaneously detect human finger touch interactions and stylus pen touch interactions efficiently, often requiring separate systems for each type of input, which increases complexity and reduces the effectiveness of touch detection sensitivity.

Innovation Solution

An integrated touch panel design incorporating first, second, and third touch electrodes, where the first and second electrodes recognize general touch operations and the third electrodes facilitate digitizer operations, allowing for simultaneous detection of both human finger and stylus pen inputs on a single panel.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If separate touch panel systems are used for human finger and stylus detection, then each input type can be detected independently, but the device complexity increases and touch detection sensitivity is reduced

Engineering Contradiction:

Improvetouch detection sensitivityVSAvoidsystem complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent combines human finger touch detection electrodes and stylus digitizer detection electrodes into a single integrated touch panel structure. The first and second touch electrodes detect human finger touches while the third touch electrodes detect stylus touches, all within one unified panel, eliminating the need for separate systems and reducing overall device complexity while maintaining detection sensitivity

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The integrated touch panel serves multiple functions simultaneously: it detects both human finger touches and stylus touches using different electrode configurations. The same physical panel structure supports both capacitive touch detection and digitizer detection, making the system universal and eliminating redundant components

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Adaptability or versatility

If multiple separate touch panels are used to detect different input types, then comprehensive input detection is achieved, but the display apparatus width increases

Engineering Contradiction:

Improveinput detection capabilityVSAvoiddisplay apparatus width

Core Design Contradiction:

Adaptability or versatilityVSLength of stationary object

Solution Approach 1:

Multiple electrode systems for different input types are merged into a single integrated touch panel layer. The first, second, and third touch electrodes are all positioned within the same panel structure, allowing comprehensive input detection without increasing the overall width of the display apparatus

Inventive Principle:

Principle #5Merging (Combining)

3Reliability

If separate touch panels are used for different input types, then each input type can be optimized independently, but manufacturing efficiency decreases

Engineering Contradiction:

Improveinput detection reliabilityVSAvoidmanufacturing efficiency

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent integrates all touch electrodes and digitizer electrodes into a single manufactured panel structure, allowing all components to be produced simultaneously in one manufacturing process rather than requiring separate production and assembly of multiple panels, thereby improving manufacturing efficiency while maintaining detection reliability

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

A single universal touch panel design serves both human finger and stylus detection functions, simplifying the manufacturing process by eliminating the need to produce and assemble multiple specialized panels, thus improving productivity without compromising the reliability of either input type

Inventive Principle:

Principle #6Universality (Multi-functionality)

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

The integrated touch panel enhances touch detection sensitivity and reduces the width of the display apparatus capable of recognizing both types of inputs, improving reliability and manufacturing efficiency by integrating all necessary electrodes into a single panel.

Implementation Method 1

capacitive type touch panels, which may detect a change in capacitance associated with a touch (or a near touch) of, for instance, a finger or conductive member

Methodology Applied

Scientific EffectCapacitance: Capacitance

Data Source

PatentUS11669212B2Touch panel and display apparatus including the same

Publication Date: 2023.06.06 SAMSUNG DISPLAY CO LTD

AI summary

A touch panel includes first touch electrodes, second touch electrodes, and third touch electrodes. The first touch electrodes include sub electrodes spaced apart from one another in a first direction. The second touch electrodes extend in a second direction crossing the first direction. The second touch electrodes are spaced apart from one another in the first direction. The third touch electrodes extend in the second direction and are spaced apart from one another in the first direction. The third touch electrodes are shaped differently than the second touch electrodes.