Multifunction fingerprint sensor with light detection to prevent forgery of fingerprint

摘要

The disclosed technique provides optical anti-counterfeiting techniques when detecting fingerprints in devices or systems that use fingerprint identification to control access. The disclosed technique uses a fingerprint sensor to detect contact input associated with a source of fingerprint; Generate an image signal from the fingerprint sensor in response to a detected contact input representing one or more images of the fingerprint; Using an optical biometric sensor separate from the fingerprint sensor to generate a biometric marker detection signal indicative of a biometric identifier different from the fingerprint; The generated image signal and the biometric marker detection signal are processed by the processing circuitry to determine whether the detected contact and the associated one or more fingerprint images originate from a finger of a living person performing a touch input.