Under-screen biometric identification apparatus and electronic device

An under-screen biometric identification apparatus, applicable to an electronic device having a display screen, the under-screen biometric identification apparatus comprising:

• a lens unit, comprising at least one aspherical lens, structured to be disposed under a display screen for receiving an optical signal generated when a finger above the display screen is illuminated by light emitted from the display screen, wherein the optical signal is used to detect biometric information of the finger;
• and
• a sensing chip, comprising an optical sensing array having a plurality of optical sensing unit, the sensing chip being structured to be disposed under the lens unit;
• wherein the light passing through the lens unit is focused to the optical sensing array of the sensing chip, and the sensing chip is configured for implementing optical imaging based on the optical signal;
• wherein a distance between a photosurface of the sensing chip and an imaging surface of the lens unit is greater than or equal to a preset value to enable the sensing chip to operate in a defocusing state, such that the optical signal corresponding to light reflection of the finger is well-imaged on the photosurface of the sensing chip, while an optical signal corresponding to an internal structure of the display screen is incapable of being imaged on the photosurface of the sensing chip.