The present application provides an under-screen fingerprint recognition apparatus, a Liquid Crystal Display (LCD) fingerprint recognition system, and an electronic device. The under-screen fingerprint recognition apparatus is applied to an electronic device having an LCD screen and is located under the LCD screen; at least part of a fingerprint detection area of the under-screen fingerprint recognition apparatus is located in a display area of the LCD screen; the under-screen fingerprint recognition apparatus comprises a detection light source used for emitting detection light and a fingerprint recognition module located below the LCD screen; wherein the detection light irradiates a finger above the fingerprint detection area and forms fingerprint detection light carrying fingerprint information, and the fingerprint recognition module is used for receiving the fingerprint detection light penetrating through the LCD screen to obtain a fingerprint image of the finger, so that under-screen fingerprint recognition of the electronic device adopting the LCD screen is achieved.
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