SYSTÈME DE RECONNAISSANCE D'EMPREINTE DIGITALE OPTIQUE SOUS ÉCRAN, MODULE DE RÉTROÉCLAIRAGE, ÉCRAN D'AFFICHAGE ET DISPOSITIF ÉLECTRONIQUE

摘要

An under-screen optical fingerprint recognition system, a backlight module, a display screen, and an electronic device are provided. The under-screen optical fingerprint recognition system is applied to a display screen with a backlight module, the under-screen optical fingerprint recognition system includes a fingerprint recognition chip and a first light source, the wavelength of fingerprint detecting light emitted by the first light source is within a preset wavelength range, the fingerprint recognition chip is arranged below the backlight module for receiving light carrying fingerprint information that passes through the backlight module and has a diffusivity smaller than or equal to a set threshold, and the light carrying fingerprint information is reflected by a finger from the light emitted by the first light source. The under-screen optical fingerprint recognition system may be applied to a display screen (such as an LCD screen) with a backlight module to meet the requirements of the LCD screen for under-screen fingerprint recognition.