Under-screen biometric identification apparatus and electronic device

An electronic device, comprising:

• a display screen;
• and
• a biometric identification apparatus arranged under the display screen, wherein a biometric acquisition area of the biometric identification apparatus is at least partially located in a display area of the display screen, wherein the biometric identification apparatus comprises:
• a lens barrel having a lens unit arranged therein, the lens unit being configured for receiving an optical signal that is generated when a human finger on the display screen is illuminated and transmitted through the display screen;
• a holder for holding the lens barrel, the holder being engaged to the lens barrel through a focusing thread, the focusing thread is used to adjust a distance between the lens unit and the display screen;
• and
• an imaging chip arranged under the lens barrel, the imaging chip being configured for implementing optical imaging based on the optical signal passing through the lens unit to obtain a biometric pattern;
• wherein the holder is fixed to a lower surface of a fixing support of the electronic device, such that the holder and the lens barrel are distanced from the display screen to maintain a predetermined gap between the display screen and the lens unit;
• and
• wherein the predetermined gap between the display screen and the lens unit is in a range from 0.3 mm to 1 mm, and the lens unit comprises an aspherical lens group cooperatively formed a macro lens with a focal length being in a range from 0.5 mm to 1.8 mm.

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

• a lens barrel having a lens unit arranged therein and structured to be arranged under a display screen, the lens unit being configured for receiving an optical signal that is generated when a human finger on the display screen is illuminated and transmitted through the display screen;
• a holder for holding the lens barrel and being engaged to the lens barrel, wherein the holder is structured to be fixed to a lower surface of a fixing support of the electronic device, such that the holder and the lens barrel are distanced from the display screen to maintain a predetermined gap between the display screen and the lens unit;
• and
• an imaging chip arranged under the lens barrel and being accommodated in the holder, the imaging chip being configured for implementing optical imaging based on the optical signal passing through the lens unit to obtain a biometric pattern;
• wherein the predetermined gap between the display screen and the lens unit is in a range from 0.3 mm to 1 mm, and the lens unit comprises an aspherical lens group cooperatively formed a macro lens with a focal length being in a range from 0.5 mm to 1.8 mm.

An electronic device, comprising:

• a display screen;
• and
• a biometric identification apparatus arranged under the display screen, wherein a biometric acquisition area of the biometric identification apparatus is at least partially located in a display area of the display screen, wherein the biometric identification apparatus comprises:
• a lens barrel having a lens unit arranged therein, the lens unit being configured for receiving an optical signal that is generated when a human finger on the display screen is illuminated and transmitted through the display screen;
• a holder for holding the lens barrel, the holder being engaged to the lens barrel through a focusing thread, the focusing thread is used to adjust a distance between the lens unit and the display screen;
• and
• an imaging chip arranged under the lens barrel, the imaging chip being configured for implementing optical imaging based on the optical signal passing through the lens unit to obtain a biometric pattern;
• wherein the holder is fixed to a lower surface of a middle frame of the electronic device, such that the holder and the lens barrel are distanced from the display screen to maintain a predetermined gap between the display screen and the lens unit;
• wherein the holder comprises a glue dispensing structure, wherein the glue dispensing structure comprises a concave groove formed around the lens barrel for providing an accommodation space for glue, the glue dispensing structure is an annular step structure comprising a step surface being parallel to an upper surface of the holder and communicated with a threaded hole of the holder, and a vertical surface connected between the upper surface of the holder and the step surface.