Revealing the latest patents for Google AR glasses and wrist devices, gesture recognition technology has improved again

Google has recently made new breakthroughs in the field of augmented reality (AR) technology. According to the latest public list from the United States Trademark and Patent Office (USPTO), the company has successfully applied for a technology patent for wrist smart devices used with AR glasses. This innovative technology will bring users an unprecedented gesture interaction experience. This invention enables users to interact more intuitively and naturally with AR glasses through wrist devices, providing a more immersive AR experience. This breakthrough by Google is expected to further promote the development of AR technology and bring more innovation and convenience to users.

The patent details the core components of a smart device, including an electromagnetic radiation source, specifically a radiation source capable of emitting infrared band light-emitting diodes to the user's wrist, and a Highly sensitive infrared detector. This infrared detector can generate a two-dimensional image sequence of the area within the dermal layer of the user's wrist, providing an accurate data basis for subsequent gesture recognition.

# It is understood that the key technology in the patent lies in the design of the gesture detection circuit. The circuit is capable of analyzing changes in biological indicators extracted from two-dimensional image sequences, specifically changes in the perfusion index (PI). By corresponding these bioflow index values ​​to specific hand or finger movements, the gesture detection circuit can accurately identify the user's gesture intention and feed it back to the AR glasses in real time to achieve natural and smooth gesture interaction. This technology has huge application potential and can provide users of AR glasses with a more intuitive and efficient way of interaction, further expanding the application fields of AR technology.

In addition, the patent drawings further demonstrate the implementation details of this technology. Figure 3 shows the design schematic of the wrist-based image capture device, that is, the design of the camera part. Figure 4 details the camera structure used to detect infrared and/or RGB illumination within a wrist-mounted device. Figure 5 presents the overall layout of this wrist-mounted image capture device from a bottom perspective. Together, these design drawings form a complete implementation of this innovative technology.

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