Capacitive Touch Screen D2D Communication via Human Body

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Solution Overview

Problem

Existing device-to-device communication methods require separate hardware modules and consume significant power, whereas capacitive coupling enables communication through a human body using capacitor sensor touch screens, allowing for efficient and power-effective data exchange between devices without additional hardware.

Innovation Solution

Implementing capacitive coupling between capacitor sensor touch screens and devices without display functions, utilizing the human body as a signal medium for device-to-device communication, with methods including initiation signals, acknowledgments, and time division multiplexing for data transmission and reception.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If separate hardware modules are used for device-to-device communication, then communication functionality is achieved, but device complexity and power consumption increase

Engineering Contradiction:

Improvecommunication functionalityVSAvoidhardware modules

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The capacitor sensor touch screen is designed to serve dual purposes: traditional touch input functionality and device-to-device communication. The same capacitive sensing circuitry and electrode structure are used for both touch detection and wireless communication, eliminating the need for separate hardware modules dedicated solely to communication functions.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent merges the communication hardware with the existing touch screen structure by integrating capacitive coupling circuits into the touch panel. The transmitter and receiver circuits are combined within the touch controller, and the touch screen electrodes serve as both touch sensing elements and communication antennas, reducing overall device complexity.

Inventive Principle:

Principle #5Merging (Combining)

2Reliability

If separate hardware modules are used for device-to-device communication, then communication functionality is achieved, but power consumption increases

Engineering Contradiction:

Improvecommunication functionalityVSAvoidpower consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The system utilizes the human body's natural capacitive properties as part of the communication medium. The body acts as a parasitic capacitor that facilitates signal transmission between devices, reducing the need for active power-consuming amplification and signal boosting circuits that would otherwise be required for air-based wireless communication.

Inventive Principle:

Principle #25Self-service

3Device complexity

If capacitive coupling through human body is used, then hardware modules are eliminated and power consumption is reduced, but communication reliability may be affected by body movement

Engineering Contradiction:

Improvehardware modulesVSAvoidcommunication stability

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The communication system is designed to dynamically adapt to changes in the capacitive coupling conditions caused by body movement. The transmitter and receiver circuits continuously adjust their operating parameters, such as frequency and signal amplitude, to maintain reliable communication despite variations in body position, movement, or contact pressure with the devices.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system incorporates feedback mechanisms where the receiver detects signal quality and communicates this information back to the transmitter. Based on this feedback, the transmitter adjusts its output parameters in real-time to compensate for changes in capacitive coupling conditions, ensuring stable communication even when the user moves or changes posture.

Inventive Principle:

Principle #23Feedback

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 eliminates the need for separate hardware modules, reduces power consumption, and enables efficient device-to-device communication by leveraging existing touch panel circuitry, facilitating ad hoc networks and direct device interactions.

Implementation Method 1

capacitive coupling enables communication through a human body using capacitor sensor touch screens

Methodology Applied

Scientific EffectCapacitive coupling: Capacitance

Implementation Method 2

utilizing the human body as a signal medium for device-to-device communication

Methodology Applied

Scientific EffectHuman body as signal medium: Conduction (electrical)

Data Source

PatentUS9585182B2Device-to-device communications based on capacitive sensing and coupling via human body or direct device-to-device coupling

Publication Date: 2017.02.28 SHENZHEN GOODIX TECH CO LTD

AI summary

Systems, devices and techniques disclosed in this document provide device-to-device communications via a human body of a user between (1) a capacitor sensor touch screen device that includes a capacitor sensor touch screen that includes capacitor sensors and provides a display function and (2) a capacitor sensor device that includes one or more capacitor sensors that detect or sense, based on capacitive sensing and without providing a display function, signals transmitted from the capacitor sensor touch screen of the capacitor sensor touch screen device. The human body of a user operates as a signal transmitting medium. In addition, the systems, devices and techniques disclosed in this document provide device-to-device communications via direct device-to-device coupling between two capacitor sensor touch screen devices each including capacitor sensor touch screen that includes capacitor sensors and provides a display function.