On-Panel Pad Capacitance Pattern for Touch Recognition

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Solution Overview

Problem

Users face reduced operability when using virtual input devices on touch panel displays due to the inability to recognize the shape and arrangement of the device by touch alone, leading to frequent visual checks.

Innovation Solution

An interface device with an on-panel pad that generates a two-dimensional pattern of capacitance on a capacitive touch panel display, allowing the sensor controller to detect changes and output operation information, thereby improving user recognition and operability of virtual input devices.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a virtual input device is displayed on a touch panel screen, then the device can be integrated into the display, but the user cannot recognize the shape and arrangement by touch alone

Engineering Contradiction:

Improveintegration of input device into displayVSAvoidtactile recognition of device shape and arrangement

Core Design Contradiction:

Adaptability or versatilityVSEase of operation

Solution Approach 1:

The patent combines the display function and input detection function into a single integrated structure. The touch panel display and the on-panel pad are merged into one component, allowing the display to also serve as the input device surface. This integration eliminates the need for separate physical keyboards while maintaining tactile input capabilities through the capacitive sensing layer.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent introduces an intermediary capacitive sensing layer between the display and the user's touch. This intermediary layer detects changes in capacitance caused by the user's finger or stylus, enabling the system to recognize input gestures without requiring the user to visually verify the input device layout. The sensing layer acts as a mediator that translates physical touch into digital input signals.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Device complexity

If a virtual input device is used, then the device structure is simplified, but the user must frequently check the display visually

Engineering Contradiction:

Improvestructure of input deviceVSAvoidoperability of virtual input device

Core Design Contradiction:

Device complexityVSProductivity

Solution Approach 1:

The patent implements a feedback mechanism where the capacitive sensing layer provides real-time tactile feedback to the user through detectable changes in capacitance. When the user touches or hovers over specific areas of the on-panel pad, the system detects the capacitance changes and provides immediate feedback, allowing the user to understand the device layout through touch alone without needing to visually check the display frequently.

Inventive Principle:

Principle #23Feedback

3Ease of operation

If the on-panel pad generates a two-dimensional capacitance pattern, then tactile recognition is enabled, but the detection complexity increases

Engineering Contradiction:

Improvetactile recognition capabilityVSAvoiddetection of capacitance changes

Core Design Contradiction:

Ease of operationVSDifficulty of detecting and measuring

Solution Approach 1:

The patent replaces complex mechanical detection systems with an electrical field-based capacitive sensing system. Instead of using mechanical switches or physical sensors, the system uses changes in electrical capacitance to detect user input. This substitution simplifies the detection mechanism while enabling precise tracking of the two-dimensional capacitance pattern generated by the on-panel pad.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

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

Enhances user operability by allowing direct tactile recognition of the virtual input device's shape and arrangement, reducing the need for visual checks and improving overall interaction efficiency.

Implementation Method 1

The on-panel pad, in operation, causes a plurality of sensor electrodes included in the touch panel display to generate a two-dimensional pattern of capacitance

Methodology Applied

Scientific EffectCapacitance: Capacitance

Data Source

PatentUS11644912B2Interface device and on-panel pad

Publication Date: 2023.05.09 WACOM CO LTD

AI summary

An interface device includes an on-panel pad and a sensor controller. The interface device is used to perform an input to an electronic device in response to an operation by a user on a capacitive touch panel display of the electronic device. The on-panel pad causes sensor electrodes included in the touch panel display to generate a two-dimensional pattern of capacitance while the on-panel pad is on the touch panel display. When the two-dimensional pattern generated while the on-panel pad is on the touch panel display has been detected, the sensor controller generates or outputs data including operation information in response to a change in capacitance in a region that is associated with the two-dimensional pattern and that receives an operation of the on-panel pad, the operation information indicating an operation state of the on-panel pad.