MUMBAI, India, Sept. 28 -- Intellectual Property India has published a patent application (202641111494 A) filed by Saveetha Institute Of Medical And Technical Sciences on September 17, 2026, for Lifi Audio Transmission System.
Inventors include D. Deepak; Dr. Papiya Dutta; Dr Karthik Raja; and Dr Ramya Mohan.
The application for the patent was published on September 25, 2026, under issue no. 39/2026.
Abstract: The present invention relates to a LiFi (Light Fidelity) based Audio Transmission System that enables wireless transmission of audio signals using visible light communication technology instead of conventional radio frequency ( RF) systems such as Bluetooth or Wi-Fi. The system utilizes an LED light source as a transmitter to modulate audio signals into light intensity variations, which are then detected by a photodiode receiver and converted back into audio output through an amplifier and speaker system. The proposed system ensures secure, interference-free, high-speed, and energyefficient audio communication. Since LiFi operates using visible light spectrum, it offers enhanced data security and minimal electromagnetic interference compared to RF-based systems. The invention is suitable for use in hospitals, aircraft cabins, secure military zones, classrooms, and smart homes where RF communication may be restricted or undesirable. The system integrates modulation circuitry, driver circuits, optical receiver modules, and amplification units to provide stable and high-quality audio transmission. The audio signal from a microphone, mobile device, or auxiliary input is first conditioned and amplified before being encoded into optical form using highfrequency modulation techniques. The LED driver circuit enables precise and stable light modulation without visible flickering. At the receiver side, a high-sensitivity photodiode captures the transmitted optical signal and converts it into an electrical signal proportional to the original audio waveform. Signal filtering and amplification stages ensure clear and distortion-free sound reproduction. Unlike traditional wireless systems that experience bandwidth congestion and signal overlap, the LiFi Audio Transmission System operates within the visible light domain, thereby reducing spectrum crowding and improving transmission reliability. The line-of-sight nature of light communication enhances privacy and prevents unauthorized interception from outside the illuminated area. Additionally, the system can be integrated with existing LED lighting infrastructure, reducing implementation cost and improving energy utilization. The invention is particularly suitable for use in hospitals, aircraft cabins, defense establishments, underwater communication environments, smart classrooms, and other RF-restricted zones where electromagnetic interference must be minimized. The compact design, low power consumption, high fidelity output, and improved security features make t11,Q.zioka racti al and innovative alternative to conventional wireless audio transmissioiCititchvogatite,o
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