A mobile terminal comprising: a circular polarizing plate, a display panel, a first phase retarder, a light splitting element and two light sensors (15, 16), wherein the circular polarizing plate is arranged to convert ambient light into first circularly polarized light, and is located on a side, far away from the first phase retarder, of the display panel; the first phase retarder is located between the display panel and the light splitting element and is a quarter wave plate, to convert the first circularly polarized light passing through the display panel into first linearly polarized light, and to convert, together with the light splitting element, light emitted by the display panel into second circularly polarized light; the light splitting element is a polarizing light splitting prism or a polarizing light splitting flat plate, and the light splitting element is located between the first phase retarder and one of the two light sensors (15, 16) and is inclined relative to a side surface, opposite to the polarizing light splitting flat plate, on the first phase retarder to make the ambient light and the light emitted by the display panel obliquely incident to the polarizing light splitting flat plate, to split the second circularly polarized light into second linearly polarized light and third linearly polarized light; the second linearly polarized light and the third linearly polarized light are perpendicular to each other; and one of the two light sensors is arranged to receive the second linearly polarized light and the first linearly polarized light passing through the light splitting element; and the other one of the two light sensors is arranged to receive the third linearly polarized light, wherein propagation directions of the first linearly polarized light and the second linearly polarized light are the same and differ from the propagation direction of the third linearly polarized light. a circular polarizing plate, a display panel, a first phase retarder, a light splitting element and two light sensors (15, 16), wherein the circular polarizing plate is arranged to convert ambient light into first circularly polarized light, and is located on a side, far away from the first phase retarder, of the display panel; the first phase retarder is located between the display panel and the light splitting element and is a quarter wave plate, to convert the first circularly polarized light passing through the display panel into first linearly polarized light, and to convert, together with the light splitting element, light emitted by the display panel into second circularly polarized light; the light splitting element is a polarizing light splitting prism or a polarizing light splitting flat plate, and the light splitting element is located between the first phase retarder and one of the two light sensors (15, 16) and is inclined relative to a side surface, opposite to the polarizing light splitting flat plate, on the first phase retarder to make the ambient light and the light emitted by the display panel obliquely incident to the polarizing light splitting flat plate, to split the second circularly polarized light into second linearly polarized light and third linearly polarized light; the second linearly polarized light and the third linearly polarized light are perpendicular to each other; and one of the two light sensors is arranged to receive the second linearly polarized light and the first linearly polarized light passing through the light splitting element; and the other one of the two light sensors is arranged to receive the third linearly polarized light, wherein propagation directions of the first linearly polarized light and the second linearly polarized light are the same and differ from the propagation direction of the third linearly polarized light.