An electronic device (101, 500, 700, 900, 1000) comprising: a housing including a front face and a rear face opposite the front face and a side face disposed between the front and rear faces; a transparent plate (310, 710) having a first face defining the front face of the housing; a display panel (410, 720) including a plurality of pixels configured to emit light towards the transparent plate (310, 710), the display panel (410, 720) having a first face in contact with a second face of the transparent plate (310, 710); a flexible printed circuit board (533, 780, 880), on which are disposed: a fingerprint sensor (430, 531, 740, 840, 940, 1040, 1140) in contact with a second face of the display panel (410, 720) and configured to acquire biometric information about an external object within a specified proximity of the transparent plate (310, 710); and a conductive pattern (535, 760, 860, 960, 1060, 1160) comprising a conductive material surrounding at least a portion of the fingerprint sensor (430, 531, 740, 840, 940, 1040, 1140) and configured to detect whether the external object is within a specified proximity of the fingerprint sensor (430, 531, 740, 840, 940, 1040, 1140); and at least one auxiliary flexible printed circuit board (970, 1170, 1080, 1180) including an auxiliary conductive pattern (971, 1081) disposed to be biased more towards the side face of the housing than towards the fingerprint sensor (430, 531, 740, 840, 940, 1040, 1140) and configured to determine whether the external object is within a specified proximity of the fingerprint sensor (430, 531, 740, 840, 940, 1040, 1140), wherein the fingerprint sensor (430, 531, 740, 840, 940, 1040, 1140) is activated based on the movement time or a detection order of an external object between the auxiliary conductive pattern (971, 1081) and the conductive pattern (535, 760, 860, 960, 1060, 1160). a transparent plate (310, 710) having a first face defining the front face of the housing; a display panel (410, 720) including a plurality of pixels configured to emit light towards the transparent plate (310, 710), the display panel (410, 720) having a first face in contact with a second face of the transparent plate (310, 710); a flexible printed circuit board (533, 780, 880), on which are disposed: a fingerprint sensor (430, 531, 740, 840, 940, 1040, 1140) in contact with a second face of the display panel (410, 720) and configured to acquire biometric information about an external object within a specified proximity of the transparent plate (310, 710); and a conductive pattern (535, 760, 860, 960, 1060, 1160) comprising a conductive material surrounding at least a portion of the fingerprint sensor (430, 531, 740, 840, 940, 1040, 1140) and configured to detect whether the external object is within a specified proximity of the fingerprint sensor (430, 531, 740, 840, 940, 1040, 1140); and a fingerprint sensor (430, 531, 740, 840, 940, 1040, 1140) in contact with a second face of the display panel (410, 720) and configured to acquire biometric information about an external object within a specified proximity of the transparent plate (310, 710); and a conductive pattern (535, 760, 860, 960, 1060, 1160) comprising a conductive material surrounding at least a portion of the fingerprint sensor (430, 531, 740, 840, 940, 1040, 1140) and configured to detect whether the external object is within a specified proximity of the fingerprint sensor (430, 531, 740, 840, 940, 1040, 1140); and at least one auxiliary flexible printed circuit board (970, 1170, 1080, 1180) including an auxiliary conductive pattern (971, 1081) disposed to be biased more towards the side face of the housing than towards the fingerprint sensor (430, 531, 740, 840, 940, 1040, 1140) and configured to determine whether the external object is within a specified proximity of the fingerprint sensor (430, 531, 740, 840, 940, 1040, 1140), wherein the fingerprint sensor (430, 531, 740, 840, 940, 1040, 1140) is activated based on the movement time or a detection order of an external object between the auxiliary conductive pattern (971, 1081) and the conductive pattern (535, 760, 860, 960, 1060, 1160).