Electronic device for providing augmented reality and method by which electronic device compensates for image

An electronic device comprising:

• a display configured to output light including an augmented reality image;
• a wave guide configured to transmit light output from the display toward a user's eyes;
• at least one alignment coupler disposed on an optical path formed by the wave guide, and configured to diffract at least a part of incident light at a specified angle;
• a photodetector configured to detect at least a part of light diffracted by the alignment coupler;
• memory;
• and
• at least one processor, comprising processing circuitry, operatively connected to the display, the photodetector, and the memory,
• wherein the memory stores instructions executable by at least one processor individually and/or collectively, when executed, cause the electronic device to:
• identify information related to light detected by the photodetector;
• determine a position error of an augmented reality image incident on the user's eyes, based on the identified information;
• and
• compensate for a position of light incident on the wave guide from the display to compensate for the determined position error.