Abstract: A display device includes light emitting pixels that emit light, photosensors each controlling a sensed current according to an incident light, and a read-out circuit that senses the sensed current of each of the photosensors and converts the sensed current into digital sensed data. In a sensing mode including a first frame period and a second frame period, the light emitting pixels include first sensing pixels that emit the light during the first frame period and second sensing pixels that do not emit the light during the first frame period, the photosensors include first photosensors and second photosensors, and a first distance between any one of the first sensing pixels and a first photosensor adjacent to the first sensing pixel among the first photosensors is greater than a second distance between the first sensing pixel and a second photosensor adjacent to the first sensing pixel among the second photosensors.

Abstract: Disclosed is a treatment device capable of suppressing generation of pain in a person to be treated and obtaining a continuous and fundamental skin treatment effect. The treatment device includes a handpiece body, a needle unit which is provided at one side of the handpiece body and includes a plurality of needles including hollow portions therein and having front ends inserted into an epidermis of skin of a person to be treated, a high frequency generator which is electrically connected to the needle unit, receives a high frequency current when the front ends of the needles are inserted into the epidermis, and heats the needles using the high frequency current, and a medicine delivery unit which communicates with the hollow portions of the plurality of needles and delivers a medicine to the epidermis through the hollow portions when the front ends of the needles are inserted into the epidermis.

Abstract: Disclosed is a skin treatment device including a treatment unit inserted into skin to stimulate the skin, a holder unit for detachably mounting the treatment unit thereonto to transfer a signal to the treatment unit, and a handpiece unit for mounting the holder unit thereonto to supply the signal to the holder unit, thereby rapidly exchanging the treatment unit.