Touch Sensing Apparatus Diagonal Touch Detection

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing touch sensing systems face inaccuracies in determining touch coordinates when the pattern of touch electrodes is changed, leading to incorrect recognition of touched areas, especially when multiple touches are detected.

Innovation Solution

A touch sensing apparatus and method that utilize a combination of vertical and horizontal pattern electrodes, where sensing values from these electrodes are used to calculate touch electrode values, determining a touch event as diagonal when the sum of these values exceeds a threshold, thereby accurately identifying touch coordinates even with pattern changes.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the pattern of touch electrodes is changed, then the touch sensing apparatus can support different electrode arrangements, but the coordinate determination accuracy deteriorates

Engineering Contradiction:

Improveelectrode pattern adaptabilityVSAvoidcoordinate determination accuracy

Core Design Contradiction:

Adaptability or versatilityVSMeasurement precision

Solution Approach 1:

The patent applies parameter changes by dynamically adjusting the threshold value for diagonal touch detection based on the specific electrode pattern being used. The touch sensing circuit modifies its operating parameters (threshold values) to match different electrode arrangements, thereby maintaining accurate coordinate determination across various patterns without requiring a complete redesign of the sensing algorithm

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The system implements dynamics by making the touch detection algorithm adaptive rather than static. The touch sensing circuit can switch between different detection modes and adjust its parameters in real-time based on the detected electrode pattern, allowing the system to maintain high precision across multiple electrode configurations

Inventive Principle:

Principle #15Dynamics

2Adaptability or versatility

If the touch electrode pattern is changed, then different arrangements can be supported, but the touch position recognition accuracy deteriorates

Engineering Contradiction:

Improveelectrode arrangement flexibilityVSAvoidtouch position recognition accuracy

Core Design Contradiction:

Adaptability or versatilityVSMeasurement precision

Solution Approach 1:

The patent changes parameters by adjusting the threshold values used in diagonal touch detection algorithms based on the specific electrode pattern. This allows the system to maintain accurate touch position recognition across different electrode arrangements by optimizing the detection parameters for each pattern type

Inventive Principle:

Principle #35Parameter changes

3Stability of the object's composition

If the existing touch processing scheme is applied to changed electrode patterns, then processing consistency is maintained, but inaccurate touch results are produced

Engineering Contradiction:

Improveprocessing scheme consistencyVSAvoidtouch result accuracy

Core Design Contradiction:

Stability of the object's compositionVSMeasurement precision

Solution Approach 1:

The system implements dynamics by making the processing scheme adaptive to different electrode patterns. Rather than using a fixed processing scheme, the touch sensing circuit dynamically adjusts its detection algorithms and threshold values based on the detected pattern, maintaining both consistency in approach and accuracy in results across different configurations

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent applies parameter changes by modifying the threshold values and detection parameters based on the electrode pattern being used. This allows the system to maintain processing consistency through a unified adaptive framework while achieving accurate touch results for each specific pattern

Inventive Principle:

Principle #35Parameter changes

4Speed

If diagonal touch detection is performed without threshold adjustment, then detection speed is maintained, but false touch detection increases

Engineering Contradiction:

Improvetouch detection speedVSAvoidtouch detection accuracy

Core Design Contradiction:

SpeedVSMeasurement precision

Solution Approach 1:

The patent applies preliminary action by pre-calculating and storing optimal threshold values for different electrode patterns. When a touch is detected, the system quickly retrieves the appropriate threshold based on the detected pattern and applies it immediately, avoiding the need for complex real-time calculations while maintaining high detection accuracy and preventing false positives

Inventive Principle:

Principle #10Preliminary action

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 approach minimizes errors in coordinate determination and prevents incorrect recognition of touched areas, ensuring precise touch sensing across different electrode patterns.

Implementation Method 1

The touch panel can be configured to perform touch recognition in a capacitive method

Methodology Applied

Scientific EffectCapacitance: Capacitance

Data Source

PatentUS11886665B2Touch sensing apparatus and touch sensing method

Publication Date: 2024.01.30 LX SEMICON CO LTD

AI summary

The present disclosure relates to a technology for sensing a touch panel, in which vertical pattern electrodes and horizontal pattern electrodes are disposed, and provides a method for determining the sense of two touches when two touches are sensed in a touch panel and a method for preventing a ghost touch when changing data in an SNS touch pattern to data in a normal pattern at the time of sensing two touches.