Through the MIPI-DPHY physical layer protocol, the camera of Rokid Glasses realizes the biometric collection required for voiceprint payment. When the user wakes up "Zhi Xiaobao" by voice, the MIPI camera will simultaneously activate the macro mode and work in conjunction with the infrared sensor to complete the liveness detection, ensuring the security of the payment. The collaborative design of the diffracted optical waveguide and the MIPI camera enables the shooting status indicator light to accurately reflect the working status of the camera. This hardware-level privacy prompt mechanism is precisely achieved by relying on the GPIO control pins of the MIPI interface.