MUMBAI, India, July 24 -- Intellectual Property India has published a patent application (202641067461 A) filed by The Principal,mepco Schlenk Engineering College on May 29, 2026, for Adaptive Eye Blink Based Communication And Emergency Alert System For Paralysis Patients.
Inventors include Dr. V. Jeyalakshmi; S. Iswarya; and A. Miruthula.
The application for the patent was published on July 17, 2026, under issue no. 29/2026.
Abstract: The present invention discloses a low-cost, non-invasive wearable communication device for severely paralysed piltients who retain voluntary ocular function. The system •combines an infrared trans-mrecittereiver sensor module (I) mounted on a spectacle frame, an Arduino Nano microcontroller (2) running a pulse-width discrimination firmware, a J6x2 l2C liquid crystal display (4), a piezoelectric buzzer (5), and a portable 9V battery (6). Eyelid closure raises reflectance of the 940 nm beam, generating a digital HIGH pulse. The microcontroller timestamps blink onset and offset, computes duration, and suppresses involuntary blinks below 500 ms. Three deliberate blink ranges map to commands: "I NEED WATER" (2.5-4.5 s), "I AM HUNGRY" (4.5-6.5 s), and "EMERGENCY" ( 6.5 s). Each validated command triggers simultaneous LCD text display and a severity-coded buzzer pulse pattern. An adaptive LM393 comparator threshold and a 200 ms software debounce filter together maintain 92%-95% accuracy across varying patient anatomy and ambient conditions. The LM393 adaptive comparator threshold is the hardware layer. The sensor produces a voltage. A comparator chip watches that voltage and decides: is the eyelid open or closed. Every patient is different, darker skin absorbs more infrared and deeper-set eyes rellect less. Bright room lighting adds noise. Use of nxed voltage threshold makes the system to fail on different patients. The LM393 solves this by measuring the background noise floor nrst, then setting its trigger level just above it. The device operates entirely on battery, demands no calibration by trained personnel, and functions in intensive care units, home settings, or rehabilitation environments. Optional UART provision supports GSM or Wi-Fi integration for remote alert delivery. Designed for individuals who have lost all limb, hand, and vocal-cord motor function, the invention removes both the financial and operational barriers that currently exclude most paralysed patients from existing high-end eye-tracking communication systems.
Disclaimer: Curated by HT Syndication.
