Communication Device Pullout Signal for Fast Disconnection Detection

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Solution Overview

Problem

Existing communication systems struggle to promptly detect the disconnection of a communication device from a computer, leading to delayed termination of image projection due to the inability to distinguish between device removal and temporary data transmission stoppages, resulting in prolonged disconnection detection times that exceed user tolerable limits.

Innovation Solution

A communication device with a processing circuit and communication circuit that generates and transmits a pullout signal when removed from the computer, allowing the projector to promptly detect disconnection and execute corresponding processing.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the image projection device waits for a certain period of time before determining disconnection, then false disconnection detection due to temporary transmission stops is reduced, but the time to detect actual device removal is prolonged beyond user tolerable limits

Engineering Contradiction:

Improvedisconnection detection accuracyVSAvoiddevice removal detection time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The communication device transmits a pullout signal proactively when the connector is pulled out, before the image projection device can determine disconnection through timeout. This preliminary action allows the image projection device to immediately recognize disconnection without waiting for the timeout period to elapse, thus resolving the contradiction between detection accuracy and detection speed.

Inventive Principle:

Principle #10Preliminary action

2Loss of time

If the image projection device promptly determines disconnection upon transmission stop, then response time is reduced, but false disconnection detection occurs during temporary transmission interruptions

Engineering Contradiction:

Improvedisconnection detection timeVSAvoiddisconnection detection accuracy

Core Design Contradiction:

Loss of timeVSReliability

Solution Approach 1:

The system uses feedback from the pullout signal transmitted by the communication device to accurately determine disconnection. The image projection device receives this feedback signal and immediately executes disconnection processing, avoiding false detection during temporary transmission interruptions while maintaining prompt response time.

Inventive Principle:

Principle #23Feedback

3Loss of time

If the communication device transmits a pullout signal upon removal, then disconnection detection speed is improved, but additional communication overhead and power consumption are introduced

Engineering Contradiction:

Improvedisconnection detection timeVSAvoidcommunication device power consumption

Core Design Contradiction:

Loss of timeVSUse of energy by moving object

Solution Approach 1:

The patent extracts the essential disconnection notification function from the continuous data transmission process. By transmitting only a simple pullout signal when the connector is removed, rather than maintaining full communication protocols, the system achieves fast disconnection detection with minimal additional power consumption.

Inventive Principle:

Principle #2Taking out (Extraction)

Data Source

PatentUS11989149B2Communication device and communication system with storing and erasing features

Publication Date: 2024.05.21 SEIKO EPSON CORP

AI summary

A communication device includes a connector inserted into a first device, a communication circuit which performs wireless communication with a second device, and a processing circuit. The processing circuit is programmed to communicate with the first device via the connector to control the communication circuit, wherein the processing circuit is configured to execute generating a first signal representing that the connector is pulled out from the first device when the processing circuit detects that the connector is pulled out from the first device, and transmitting the first signal to the second device by controlling the communication circuit.