A terminal device, comprising: a fingerprint identification apparatus and a display screen; wherein the fingerprint identification apparatus comprises, arranged from an object side to an image side: a lens system (401/10); an imaging sensor, disposed on the image side of the lens system (401/10); wherein the lens system consists of: a first lens, a second lens and a third lens arranged sequentially from the object side to the image side, wherein the first lens is a meniscus-shaped negative optical power lens with the object side being concave on an optical axis and the image side being concave, the second lens is a positive optical power lens with both object side and image side being convex, and the third lens is a positive optical power lens with both object side and image side being convex; wherein the display screen is disposed on the object side of lens system (401/10); and characterized in that parameters of the lens system (401/10) follow a first relationship so that a field of view, FOV, of the lens system is greater than a first threshold, wherein the parameters of the lens system include at least two of the following: a focal length of the first lens, a focal length of the second lens, a focal length of the third lens, a combined focal length of the first lens and the second lens, a combined focal length of the second lens and the third lens, and a focal length of the lens system; wherein the first relationship is 1.0< f 12 / f 3 <2.7, wherein f 12 is the combined focal length of the first lens and the second lens, and f 3 is the focal length of the third lens; and in that the largest image height Y' on an imaging plane of the lens system, the focal length f, and a distance from an image side surface of the display screen to the imaging plane of the lens system, TTL, follow a second relationship so that the focal length of the lens system is less than a second threshold, and wherein the second relationship is 0.4 < Y'/ ( f * TTL)<0.5 a lens system (401/10); an imaging sensor, disposed on the image side of the lens system (401/10); wherein the lens system consists of: a first lens, a second lens and a third lens arranged sequentially from the object side to the image side, wherein the first lens is a meniscus-shaped negative optical power lens with the object side being concave on an optical axis and the image side being concave, the second lens is a positive optical power lens with both object side and image side being convex, and the third lens is a positive optical power lens with both object side and image side being convex; wherein the display screen is disposed on the object side of lens system (401/10); and characterized in that parameters of the lens system (401/10) follow a first relationship so that a field of view, FOV, of the lens system is greater than a first threshold, wherein the parameters of the lens system include at least two of the following: a focal length of the first lens, a focal length of the second lens, a focal length of the third lens, a combined focal length of the first lens and the second lens, a combined focal length of the second lens and the third lens, and a focal length of the lens system; wherein the first relationship is 1.0< f 12 / f 3 <2.7, wherein f 12 is the combined focal length of the first lens and the second lens, and f 3 is the focal length of the third lens; and in that the largest image height Y' on an imaging plane of the lens system, the focal length f, and a distance from an image side surface of the display screen to the imaging plane of the lens system, TTL, follow a second relationship so that the focal length of the lens system is less than a second threshold, and wherein the second relationship is 0.4 < Y'/ ( f * TTL)<0.5 a first lens, a second lens and a third lens arranged sequentially from the object side to the image side, wherein the first lens is a meniscus-shaped negative optical power lens with the object side being concave on an optical axis and the image side being concave, the second lens is a positive optical power lens with both object side and image side being convex, and the third lens is a positive optical power lens with both object side and image side being convex; wherein the display screen is disposed on the object side of lens system (401/10); and characterized in that parameters of the lens system (401/10) follow a first relationship so that a field of view, FOV, of the lens system is greater than a first threshold, wherein the parameters of the lens system include at least two of the following: a focal length of the first lens, a focal length of the second lens, a focal length of the third lens, a combined focal length of the first lens and the second lens, a combined focal length of the second lens and the third lens, and a focal length of the lens system; wherein the first relationship is 1.0< f 12 / f 3 <2.7, wherein f 12 is the combined focal length of the first lens and the second lens, and f 3 is the focal length of the third lens; and in that the largest image height Y' on an imaging plane of the lens system, the focal length f, and a distance from an image side surface of the display screen to the imaging plane of the lens system, TTL, follow a second relationship so that the focal length of the lens system is less than a second threshold, and wherein the second relationship is 0.4 < Y'/ ( f * TTL)<0.5