The present application provides an under-screen fingerprint recognition apparatus, an LCD fingerprint recognition system, and an electronic device. The under-screen fingerprint recognition apparatus is applied to the electronic device having a liquid crystal display screen and a middle frame. A fingerprint detection area of the under-screen fingerprint recognition apparatus is located at least partially in a display area of the liquid crystal display screen. The under-screen fingerprint recognition apparatus comprises a detection light source assembly, and a fingerprint recognition module located below the liquid crystal display screen. The detection light source assembly is used for being obliquely provided on the middle frame and located below the edge area of the liquid crystal display screen, so as to emit detection light to the fingerprint detection area. The detection light irradiates a finger above the fingerprint detection area and is reflected by the finger to form fingerprint detection light carrying fingerprint information, and the fingerprint recognition module is used for receiving the fingerprint detection light transmitting through a light transmission area to obtain a fingerprint image of the finger, so that under-screen fingerprint recognition of the electronic device using the LCD screen is achieved.
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