Electronic device and method for obtaining biometric information thereof

1. An electronic device comprising:

a display including a polarization layer;

a biometric sensor positioned to at least partially overlap the display; and

an optical member comprising a light condenser positioned between the display and the biometric sensor,

wherein the biometric sensor includes a light receiving unit comprising light receiving circuitry configured to receive light emitted from the display and reflected by an external object,

wherein a length of the light receiving unit in a first direction, is the first direction being a polarization axis direction of the polarization layer, is greater than a length of the light receiving unit in a second direction crossing the first direction,

wherein the optical member includes a plurality of lenses, and

wherein a location of a principal plane of the optical member in the first direction is different from a location of principal plane of the optical member in the second direction.

2. The electronic device of claim 1 , wherein a shape of the light receiving unit is rectangular.

3. The electronic device of claim 1 , further comprising:

a battery,

wherein a long axis of the light receiving unit and a long axis of the battery are aligned in the first direction.

4. The electronic device of claim 1 , wherein a distance between the principal plane of the optical member in the first direction and the light receiving unit is less than a distance between the principal plane of the optical member in the second direction and the light receiving unit.

5. The electronic device of claim 4 , wherein a magnification of the optical member in the first direction is greater than a magnification in the second direction.

6. The electronic device of claim 5 , wherein at least one of the plurality of lenses is an asymmetric lens having a curvature in the first direction different from a curvature in the second direction.

7. The electronic device of claim 6 , wherein a cross-section of the asymmetric lens in the first direction is a cross-sectional shape of a concave lens, and a cross-section of the asymmetric lens in the second direction is a cross-sectional shape of a convex lens.

8. The electronic device of claim 5 , further comprising:

a processor operatively connected to the display and the biometric sensor,

wherein the processor is configured to:

detect a touch of the external object;

cause one region of the display to emit light based on the touch of the external object;

obtain a raw image of an image magnification, the image magnification being different depending on a direction, based on light incident on the light receiving unit using the biometric sensor; and

obtain a fingerprint image by correcting the raw image such that all regions of the raw image have an identical image magnification.

9. The electronic device of claim 8 , wherein the processor is configured to:

correct the raw image based on magnification information according to a circumferential angle of the raw image.

10. The electronic device of claim 9 , wherein the processor is configured to:

compare the obtained fingerprint image with a pre-registered fingerprint image; and

based on determining that the obtained fingerprint image matches the pre-registered fingerprint image, perform a specified operation.

11. The electronic device of claim 5 , further comprising:

a battery,

wherein a shape of one of the plurality of lenses is elliptical, and

wherein a long axis of the battery is aligned with a long axis of one of the plurality of lenses in the second direction.