Halma has been granted a patent for a door sensor that uses IR light to detect movement. The sensor includes emitters, receptors, and a controller to reduce interference from adjacent sensors. The technology aims to improve the accuracy and reliability of door sensors in various applications. GlobalData’s report on Halma gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on Halma, was a key innovation area identified from patents. Halma's grant share as of May 2024 was 44%. Grant share is based on the ratio of number of grants to total number of patents.
Door sensor using ir light to reduce interference
A newly granted patent (Publication Number: US11988033B2) discloses a door sensor system that includes a plurality of emitters emitting IR light beams, lenses forming an IR pattern on a surface by duplicating and directing the emitted beams, receptors receiving the reflected beams during a listening phase, and a controller adjusting the timing of emitting and listening phases to reduce interference from adjacent door sensors. The system is designed to detect and prioritize the emission phase over interference beams from neighboring sensors, enhancing overall sensor performance.
Additionally, the patent describes a method for using the door sensor system, involving emitting IR light beams, forming an IR pattern on a surface, receiving and analyzing reflected beams, detecting interference from adjacent sensors, and adjusting timing to minimize interference. The method aims to optimize sensor functionality by ensuring accurate detection and response while minimizing disruptions caused by neighboring sensors. By deactivating emitters during the listening phase and sending transmissions to adjacent sensors, the system efficiently manages interference, enhancing its overall effectiveness in various door sensor applications.
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GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.
