Wireless Screen Projection via Acoustic Passcode Detection
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Solution Overview
Problem
Current wireless screen projection technologies require manual input of a passcode, leading to user errors and decreased success rates, and may result in security breaches due to forgotten projector deactivation.
Innovation Solution
Encoding a passcode in a sound signal that can be detected by a client device, allowing automatic connection and termination of wireless screen projection based on proximity and deactivation conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual passcode input is used for wireless screen projection connection, then the system requires user interaction to establish connection, but this leads to user errors and decreased success rate
Solution Approach 1:
The system performs automatic passcode transmission and connection establishment without requiring manual user input. The client device automatically detects the projector, retrieves the passcode, and completes the connection process, allowing the system to serve itself rather than requiring continuous user intervention.
Solution Approach 2:
The passcode is pre-configured in the projector device and automatically transmitted to the client device before the connection is established. This preliminary preparation of authentication information eliminates the need for manual entry and ensures the connection can proceed automatically.
2Adaptability or versatility
If the projector device remains on after use, then the display system is available for future use, but this results in security breaches
Solution Approach 1:
The system continuously monitors the presence of the client device through sound signal detection. When the client device moves away or is removed from the meeting room, the projector automatically detects this change and terminates the connection, providing real-time feedback-based security control.
Solution Approach 2:
The system replaces manual security management (remembering to turn off the projector) with an automated acoustic detection system. The projector uses its microphone to detect the presence or absence of the client device and automatically manages connection state based on this acoustic feedback.
3Reliability
If automatic connection is implemented using sound signal detection, then user errors are reduced and success rate improves, but the system complexity increases
Solution Approach 1:
The projector device uses its existing microphone, originally designed for audio output purposes, to detect sound signals containing passcodes. This multi-functional use of the microphone eliminates the need for separate detection hardware, reducing overall system complexity while enabling automatic connection.
Solution Approach 2:
The system uses sound waves as an intermediary carrier to transmit the passcode from the projector to the client device. This acoustic intermediary enables automatic authentication without requiring direct device-to-device communication protocols, simplifying the connection mechanism.
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
Improves the success rate of wireless screen projection by reducing user errors and enhancing security through automated passcode transmission and termination.
Implementation Method 1
a sound-detecting module configured to detect the sound signal
Data Source
AI summary
One embodiment provides a computer system (e.g., a client computing device) for facilitating screen projection, the first computer system comprising a processor and a memory coupled to the processor and storing instructions, which when executed by the processor cause the processor to perform a method, the method comprising: detecting a sound signal associated with a secondary display system, wherein the sound signal includes a passcode; extracting the passcode from the sound signal; processing the passcode; and transmitting data displayed on the computer system to the secondary display system, thereby allowing information displayed on the computer system to be displayed on the secondary display system.