Electronic device and method of operating the same

1. An electronic device comprising:

a display comprising an optical engine and a waveguide;

a gaze tracking sensor;

a memory configured to store one or more instructions; and

a processor configured to execute the one or more instructions to:

control the optical engine to output a first target image through the waveguide at preset different locations;

obtain gaze information of eyes of a user corresponding to a location of the first target image by using the gaze tracking sensor;

determine whether a gaze of the eyes of the user is directed to the location where the first target image is output, based on the gaze information;

according to a first result of the determination, determine an impaired area of an entire visual field;

store a vision map based on the impaired area; and

control the optical engine to output a guidance image for notifying the user of the impaired area through the waveguide, based on the vision map, wherein the guidance image indicates an outline of the impaired area in a real scene seen by the user.

2. The electronic device of claim 1 , further comprising a depth sensor, wherein the processor is further configured to execute the one or more instructions to:

control the optical engine to output a second target image through the waveguide;

output guidance information related to the second target image;

obtain, by using the depth sensor, a gesture input of the user associated with the guidance information;

obtain a user input pattern based on the gesture input of the user;

compare the second target image to the user input pattern; and

determine the impaired area based on a second result of the comparison.

3. The electronic device of claim 2 , wherein the processor is further configured to execute the one or more instructions to:

determine an area where the second target image does not match the user input pattern;

determine the impaired area based on the area where the second target image does not match the user input pattern; and

determine a degree of distortion in the impaired area based on a distance between the second target image and the user input pattern.

4. The electronic device of claim 1 , wherein the entire visual field comprises an entire display area on the waveguide, and

wherein the preset different locations comprise at least one of a plurality of locations spaced apart from each other at certain intervals on the waveguide.

5. The electronic device of claim 1 , wherein the impaired area comprises at least one of a lost area or a distorted area.

6. An electronic device comprising:

a display comprising an optical engine and a waveguide;

a gaze tracking sensor;

a depth sensor;

a varifocal lens;

a memory configured to store one or more instructions; and

a processor configured to execute the one or more instructions to:

control the optical engine to output a first target image through the waveguide at preset different locations;

obtain gaze information of eyes of a user corresponding to a location of the first target image by using the gaze tracking sensor;

determine whether a gaze of the eyes of the user is directed to the location where the first target image is output, based on the gaze information;

according to a first result of the determination, determine an impaired area of an entire visual field;

store a vision map based on the impaired area;

detect an object comprised in the impaired area, based on the vision map by using the depth sensor;

apply a prism mode to at least a partial area of the varifocal lens corresponding to the impaired area in such a manner that an image of the object is refracted and moved to a normal area; and

control the optical engine to display a virtual image indicating that the image of the object is moved to the normal area of the entire visual field.

7. The electronic device of claim 6 , wherein the prism mode is a mode in which refractive power of at least the partial area of the varifocal lens is changed, and

wherein the refractive power of the varifocal lens is changed by changing orientation of liquid crystal (LC) molecules in the varifocal lens.

8. A method of operating an electronic device, the method comprising:

controlling an optical engine to output a first target image through a waveguide at preset different locations;

obtaining gaze information of eyes of a user corresponding to a location of the first target image by using a gaze tracking sensor when the first target image is output;

determining, based on the gaze information, whether a gaze of the eyes of the user is directed to the first target image;

according to a first result of the determination, determining an impaired area of an entire visual field;

storing a vision map based on the impaired area; and

controlling the optical engine to output a guidance image for notifying the user of the impaired area through the waveguide, based on the vision map, wherein the guidance image indicates an outline of the impaired area in a real scene seen by the user.

9. The method of claim 8 , comprising:

controlling the optical engine to output a second target image through the waveguide;

outputting guidance information related to the second target image;

obtaining, by using a depth sensor, a gesture input of the user associated with the guidance information;

obtaining a user input pattern based on the gesture input of the user;

comparing the second target image to the user input pattern; and

determining the impaired area based on a second result of the comparison.

10. The method of claim 9 , wherein the determining of the impaired area comprises:

determining an area where the second target image does not match the user input pattern;

determining the impaired area based on the area where the second target image does not match the user input pattern; and

determining a degree of distortion in the impaired area based on a distance between the second target image and the user input pattern.

11. The method of claim 8 , comprising:

detecting an object comprised in the impaired area, based on the vision map by using a depth sensor;

applying a prism mode to at least a partial area of a varifocal lens corresponding to the impaired area in such a manner that an image of the object is refracted and moved to a normal area; and

controlling the optical engine to display a virtual image indicating that the image of the object is moved to the normal area of the entire visual field.

12. The method of claim 11 , wherein the prism mode is a mode in which refractive power of at least the partial area of the varifocal lens is changed, and

wherein the refractive power of the varifocal lens is changed by changing orientation of liquid crystal (LC) molecules in the varifocal lens.

13. A non-transitory computer-readable recording medium having recorded thereon a computer program for executing the method of claim 9 .