US 12193790

US Patent 12193790 (B2), titled "Wearable devices comprising semiconductor diode light sources with improved signal-to-noise ratio," was issued to inventor Mohammed N. Islam and assigned to Omni Medsci Inc. on January 14, 2025. The patent application was filed on February 9, 2024.

Abstract:
The patent describes a wearable device and related methods for measuring physiological parameters. The device includes a light source with multiple semiconductor diode light sources emitting one or more optical wavelengths. One or more lenses focus this light onto skin tissue. A synchronized detection system, featuring spatially separated detectors and at least one analog-to-digital converter, receives light reflected from the tissue and generates an output signal indicative of physiological parameters. To enhance the signal-to-noise ratio (SNR), the device can increase the light intensity of at least one diode and compares signals received when the diodes are off versus on. The wearable device is also partly configured to identify an object.

Independent Claims Overview:

• Independent Claim 1: This claim describes an optical system with a wearable device worn on a user's wrist or the back of their hand. It measures physiological parameters that change with hand stretching or finger/thumb movement. The device includes a light source with multiple light-emitting diodes (LEDs) producing light of specific wavelengths. Lenses direct this light to the skin. A detection system, synchronized with the light source and featuring multiple spatially separated detectors with analog-to-digital converters, receives reflected light and generates a physiological parameter-indicative output signal. The system improves SNR by increasing LED intensity and by comparing signals when LEDs are off versus on. The wearable device also has object identification capabilities.

• Independent Claim 11: Similar to Claim 1, this claim also describes an optical system with a wearable device placed on a user's wrist to measure physiological parameters. The light source consists of multiple semiconductor diodes that emit light, with at least a portion of the wavelengths being near-infrared (between 700 nm and 2500 nm). Lenses direct this light to skin tissue. A synchronized detection system, with spatially separated detectors and at least one analog-to-digital converter, receives the reflected light and produces a physiological parameter-indicative output signal. The system increases SNR by boosting the intensity of at least one semiconductor diode and by comparing signals when the diodes are off versus on. This wearable device is also partially configured for object identification.

• Independent Claim 20: This claim defines a remote sensing system with an array of laser diodes that generate near-infrared light (between 600 nm and 1000 nm). At least one laser diode includes Bragg reflectors and pulses at a modulation frequency between 10 MHz and 1 GHz, with an associated phase. A portion of this light is directed to an object. The detection system comprises at least one photodetector, a lens, a spectral filter, and a processor. It measures the phase shift and time-of-flight of the reflected light relative to the emitted light and generates images of the object based on the reflected light's amplitude. The detection system uses a lock-in technique synchronized to the laser diode pulsing to generate time-of-flight measurements. A camera system captures a second image of the object. The processor combines parts of the second image and the time-of-flight measurement and can communicate this combined information to a wearable device, smartphone, or tablet for processing or display.

Litigation Status:
US12193790 is currently active and involved in litigation.

• Multiple PTAB cases have been filed: PGR2025-00064 (Not Instituted - Procedural), PGR2026-00003 (Pending - Instituted), and IPR2025-01253 (Pending - Instituted).
• US District Court cases have been filed in the Texas Eastern District Court (2:24-cv-01070) and the Delaware District Court (1:25-cv-00140).

As of April 26, 2026, the provided information does not explicitly state any cases filed specifically in the Court of Appeals for the Federal Circuit (CAFC) for patent US12193790. The search results show recent CAFC activity for other patent numbers but not for 12193790.