Development of a Constant Temperature Control Light Emitting Diode Light Cold Mask Reflecting Real-Time Skin Temperature Change.

To treat and improve skin condition, photo masks using LEDs have been developed and widely marketed to consumers. However, since the skin condition of the user varies, it is difficult to simulate suitable conditions, because various variables such as light output intensity and irradiation time must be applied to the mask development. Currently, photo masks on the market were developed considering only the parameters related to light irradiation.