A fingerprint identification apparatus (20, 710), being arranged under a display screen of a terminal device to implement under-display optical fingerprint detection and comprising: an optical sensor comprising a pixel array, wherein the pixel array comprises a plurality of first type of pixel points and at least one second type of pixel point, and the plurality of first type of pixel points and the at least one second type of pixel point are configured to receive optical signals reflected from an object; the fingerprint identification apparatus (20, 710) further comprising: a color filter layer disposed only above the at least one second type of pixel point, and the color filter layer is only used to filter a part of a wave band range of an optical signal for fingerprint identification; and a processor; wherein the processor is configured to: determine at least one ratio of the intensity of the optical signal received by the each second type of pixel point to the intensity of the optical signal received by the at least one adjacent first type of pixel point as a relative light intensity of the each second type of pixel point; and determine whether the object is a real finger according to the relative light intensity of the each second type of pixel point and a relative light intensity range; wherein the at least one second type of pixel point is disposed in a cross shape, a rectangular shape or an asterisk shape. an optical sensor comprising a pixel array, wherein the pixel array comprises a plurality of first type of pixel points and at least one second type of pixel point, and the plurality of first type of pixel points and the at least one second type of pixel point are configured to receive optical signals reflected from an object; the fingerprint identification apparatus (20, 710) further comprising: a color filter layer disposed only above the at least one second type of pixel point, and the color filter layer is only used to filter a part of a wave band range of an optical signal for fingerprint identification; and a processor; wherein the processor is configured to: determine at least one ratio of the intensity of the optical signal received by the each second type of pixel point to the intensity of the optical signal received by the at least one adjacent first type of pixel point as a relative light intensity of the each second type of pixel point; and determine whether the object is a real finger according to the relative light intensity of the each second type of pixel point and a relative light intensity range; wherein the at least one second type of pixel point is disposed in a cross shape, a rectangular shape or an asterisk shape. determine at least one ratio of the intensity of the optical signal received by the each second type of pixel point to the intensity of the optical signal received by the at least one adjacent first type of pixel point as a relative light intensity of the each second type of pixel point; and determine whether the object is a real finger according to the relative light intensity of the each second type of pixel point and a relative light intensity range; wherein the at least one second type of pixel point is disposed in a cross shape, a rectangular shape or an asterisk shape.