Electronic device for improving sensitivity of sensor

According to an embodiment disclosed in this specification, an electronic device may include a cover glass, a back cover facing away from the cover glass, a display panel exposed through the cover glass, a plurality of pixels disposed on the display panel, a plurality of wires electrically connected to the plurality of pixels, a light source interposed between the display panel and the back cover, a lens interposed between the light source and the display panel and refracting light output from the light source, and a structure for passing through the light output from the light source such that the light output from the light source has a specified pattern. The structure may be interposed between the lens and the cover glass. Besides, various embodiments as understood from the specification are also possible.