According to various exemplary embodiments, there may be provided an electronic device including a housing having a first area facing a first direction and a second area facing a second direction, wherein the housing includes a window formed on at least one portion of the first area, a display module disposed between the window and the second area, a light converting member disposed between the window and the second area and configured to transmit light emitted from the display module in the first direction by at least partially converting a wavelength of the light reflected in the second direction by an external object of the housing, and an optical sensor disposed between the light converting member and the second area, wherein the optical sensor is configured to detect the object by using the light of which the wavelength is converted. Other various exemplary embodiments are also possible.