A display device, comprising: a display panel, the display panel comprising: an array substrate; an opposed substrate arranged opposite to the array substrate; a driving circuit, disposed on a side of the array substrate close to the opposed substrate; a plurality of light receivers, disposed on a side of the array substrate close to the opposed substrate, aligned in a first direction and electrically connected with the driving circuit, in which each of the plurality of the light receivers includes a light receiving surface and is configured to convert light intensity information received by the light receiving surface into electrical signal and output the electrical signal, wherein the display device further comprises: a circuit board, disposed on a side of the array substrate away from the opposed substrate; one light emitter, disposed on a side of the circuit board close to the array substrate and electrically connected with the circuit board, in which said one light emitter includes a light emitting surface which faces the array substrate and is configured to receive electrical signal and emit light from the light emitting surface according to the received electrical signal; characterized in that: the display device further comprises a moving unit which is configured to drive said one light emitter to do a translational motion, and wherein the plurality of light receivers are adapted to receive light emitted by said one light emitter, wherein the moving unit is an one-dimensional moving stage and is adapted to perform the translation motion in the first direction. an array substrate; an opposed substrate arranged opposite to the array substrate; a driving circuit, disposed on a side of the array substrate close to the opposed substrate; a plurality of light receivers, disposed on a side of the array substrate close to the opposed substrate, aligned in a first direction and electrically connected with the driving circuit, in which each of the plurality of the light receivers includes a light receiving surface and is configured to convert light intensity information received by the light receiving surface into electrical signal and output the electrical signal, wherein the display device further comprises: a circuit board, disposed on a side of the array substrate away from the opposed substrate; one light emitter, disposed on a side of the circuit board close to the array substrate and electrically connected with the circuit board, in which said one light emitter includes a light emitting surface which faces the array substrate and is configured to receive electrical signal and emit light from the light emitting surface according to the received electrical signal; characterized in that: the display device further comprises a moving unit which is configured to drive said one light emitter to do a translational motion, and wherein the plurality of light receivers are adapted to receive light emitted by said one light emitter, wherein the moving unit is an one-dimensional moving stage and is adapted to perform the translation motion in the first direction. a circuit board, disposed on a side of the array substrate away from the opposed substrate; one light emitter, disposed on a side of the circuit board close to the array substrate and electrically connected with the circuit board, in which said one light emitter includes a light emitting surface which faces the array substrate and is configured to receive electrical signal and emit light from the light emitting surface according to the received electrical signal; characterized in that: the display device further comprises a moving unit which is configured to drive said one light emitter to do a translational motion, and wherein the plurality of light receivers are adapted to receive light emitted by said one light emitter, wherein the moving unit is an one-dimensional moving stage and is adapted to perform the translation motion in the first direction.