An electronic device working as a biometric information sensing device comprising: a housing including a first surface, the first surface including a first region and a second region at least partly surrounding the first region; light emitting diodes, LEDs, (210, 211, 212, 213, 214) of a first number positioned in the first region, the first number being an integer greater than or equal to 2, and the LEDs (210, 211, 212, 213, 214) being configured to emit light having different wavelengths; photodetectors (221, 222, 223, 224) of a second number positioned in the second region, the second number being an integer greater than or equal to 2; and a control circuit (120, 230) operatively connected to the LEDs (210, 211, 212, 213, 214) and the photodetectors (221, 222, 223, 224), wherein the control circuit (120, 230) is configured to: cause the LEDs (210, 211, 212, 213, 214) of a third number to emit light sequentially or simultaneously, the third number being 1 or 2, and cause the photodetectors (221, 222, 223, 224) of a fourth number to detect light from the LEDs (210, 211, 212, 213, 214) of the third number, and wherein the fourth number is one of an integer that is not less than 2 and is not greater than the second number, wherein the electronic device comprises a display layer visually providing information to the outside of the electronic device, the display layer comprising multiple pixels, wherein at least one pixel of the multiple pixels operates as one of the LEDs (210, 211, 212, 213, 214), wherein the photodetectors (221, 222, 223, 224) include a first photodetector and a second photodetector, and wherein the control circuit (120, 230) is further configured to: estimate a signal-to-noise ratio, SNR, based on a difference between a first light detected by the first photodetector and a second light detected by the second photodetector; and increase a light intensity of at least one LED of the LEDs (210, 211, 212, 213, 214) in response to the estimated SNR being above a specified range. a housing including a first surface, the first surface including a first region and a second region at least partly surrounding the first region; light emitting diodes, LEDs, (210, 211, 212, 213, 214) of a first number positioned in the first region, the first number being an integer greater than or equal to 2, and the LEDs (210, 211, 212, 213, 214) being configured to emit light having different wavelengths; photodetectors (221, 222, 223, 224) of a second number positioned in the second region, the second number being an integer greater than or equal to 2; and a control circuit (120, 230) operatively connected to the LEDs (210, 211, 212, 213, 214) and the photodetectors (221, 222, 223, 224), wherein the control circuit (120, 230) is configured to: cause the LEDs (210, 211, 212, 213, 214) of a third number to emit light sequentially or simultaneously, the third number being 1 or 2, and cause the photodetectors (221, 222, 223, 224) of a fourth number to detect light from the LEDs (210, 211, 212, 213, 214) of the third number, and wherein the fourth number is one of an integer that is not less than 2 and is not greater than the second number, wherein the electronic device comprises a display layer visually providing information to the outside of the electronic device, the display layer comprising multiple pixels, wherein at least one pixel of the multiple pixels operates as one of the LEDs (210, 211, 212, 213, 214), wherein the photodetectors (221, 222, 223, 224) include a first photodetector and a second photodetector, and wherein the control circuit (120, 230) is further configured to: estimate a signal-to-noise ratio, SNR, based on a difference between a first light detected by the first photodetector and a second light detected by the second photodetector; and increase a light intensity of at least one LED of the LEDs (210, 211, 212, 213, 214) in response to the estimated SNR being above a specified range. cause the LEDs (210, 211, 212, 213, 214) of a third number to emit light sequentially or simultaneously, the third number being 1 or 2, and cause the photodetectors (221, 222, 223, 224) of a fourth number to detect light from the LEDs (210, 211, 212, 213, 214) of the third number, and wherein the fourth number is one of an integer that is not less than 2 and is not greater than the second number, wherein the electronic device comprises a display layer visually providing information to the outside of the electronic device, the display layer comprising multiple pixels, wherein at least one pixel of the multiple pixels operates as one of the LEDs (210, 211, 212, 213, 214), wherein the photodetectors (221, 222, 223, 224) include a first photodetector and a second photodetector, and wherein the control circuit (120, 230) is further configured to: estimate a signal-to-noise ratio, SNR, based on a difference between a first light detected by the first photodetector and a second light detected by the second photodetector; and increase a light intensity of at least one LED of the LEDs (210, 211, 212, 213, 214) in response to the estimated SNR being above a specified range. estimate a signal-to-noise ratio, SNR, based on a difference between a first light detected by the first photodetector and a second light detected by the second photodetector; and increase a light intensity of at least one LED of the LEDs (210, 211, 212, 213, 214) in response to the estimated SNR being above a specified range.