Visual Information Transmission via Modulated Light Signals
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Solution Overview
Problem
Existing real-time information transmission systems in conference settings, such as earphone-based interpretation services, can be uncomfortable and inconvenient for long-term use and often disrupt meetings with auditory announcements.
Innovation Solution
A real-time information transmission and reception system utilizing a transmission device that converts input signals into modulated light signals with frequencies greater than 60 Hz, allowing for visual information display without affecting illumination, using a light emitter, photoelectric sensor, demodulator, and signal processing unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If earphone-based interpretation services are used, then interpretation content can be delivered to listeners, but listeners feel uncomfortable and inconvenient for long-term use
Solution Approach 1:
The patent replaces the acoustic transmission system (earphones delivering sound to ears) with an optical transmission system (light emitters displaying visual information). The light emitter transmits interpretation content visually instead of auditorially, eliminating the need for wearable earphones while maintaining reliable content delivery.
2Loss of information
If auditory announcements are broadcasted among the meeting room, then important information can be communicated, but the proceeding of the meeting is interrupted
Solution Approach 1:
The patent substitutes acoustic information transmission (broadcast announcements that interrupt meetings) with optical information transmission (visual display on receivers). This allows important information to be communicated without requiring auditory attention, thus not interrupting the meeting flow and maintaining productivity.
3Object-affected harmful factors
If light emitter is driven by modulated control signal with frequencies greater than 60 Hz, then visual information can be transmitted imperceptibly to human eye, but system complexity increases
Solution Approach 1:
The patent changes the frequency parameter of the control signal to be greater than 60 Hz, which is above the human eye's flicker fusion threshold. This causes the light emitter to produce visual information that appears steady and imperceptible as flickering, making the transmission invisible to human observers while enabling reliable data communication.
Solution Approach 2:
The patent introduces a modulation controller as an intermediary device that converts digital interpretation content into modulated control signals at frequencies >60 Hz. This intermediary transforms the information into a form that can be transmitted through the light emitter imperceptibly to humans while maintaining system manageability.
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
Enables comfortable and uninterrupted visual information transmission and reception in meeting settings, avoiding the discomfort of earphones and minimizing disruptions by using light-based communication that is imperceptible to the human eye.
Implementation Method 1
a photoelectric sensor for sensing variation in the intensity of the light emitted by the light emitter of the transmission device so as to generate a current signal
Data Source
AI summary
In a real-time information transmission and reception system, a transmission device includes a light emitter driven by a modulated control signal generated by a modulation controller based on a code sequence, which is encoded from an input signal generated by an input unit and corresponding to information to be transmitted, to emit light. The modulated control signal has a constant average power, and various frequencies greater than 60 Hz. A reception device includes a photoelectric sensor for sensing the light emitted by the light emitter to generate a current signal that is demodulated and processed to generate a data output corresponding to the information and received by a display unit for displaying the information thereon.