The present application provides an under-screen fingerprint identification apparatus, an LCD fingerprint identification system and an electronic device. The under-screen fingerprint identification apparatus is applied to an electronic device with a liquid crystal display screen. The under-screen fingerprint identification apparatus is located under the liquid crystal display screen, and a fingerprint detection area of the under-screen fingerprint identification apparatus is at least partially located in a display area of the liquid crystal display screen. The under-screen fingerprint identification apparatus includes a detection light source configured to emit probe light and a fingerprint identification module located under the liquid crystal display screen. The probe light irradiates a finger above the fingerprint detection area to form fingerprint detection light carrying fingerprint information. The fingerprint identification module is configured to receive the fingerprint detection light passing through the liquid crystal display screen to obtain a fingerprint image of the finger, thus implementing under-screen fingerprint identification of an electronic device using an LCD screen.
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