Display device and method of driving the same

A method of driving a display device including a display area and pixels disposed on the display area, the method comprising:

• generating visual sensing data by sensing an eye of a user;
• generating visual information based on the visual sensing data;
• determining a viewing area which is visually recognized by the user and a non-viewing area other than the viewing area based on the visual information;
• specifying pixels corresponding to the non-viewing area among the pixels;
• generating a second image signal by converting grayscales of the pixels corresponding to the non-viewing area and not converting grayscales of the pixels corresponding to the viewing area in a first image signal of the pixels by an image converter;
• and
• providing the pixels with data signals corresponding to the second image signal,
• wherein the generating of the visual information includes:
• generating first visual information corresponding to a line of sight of the user and second visual information corresponding to a viewing angle of the user based on the visual sensing data, the line of sight of the user being an extension line along a normal direction from a center of a pupil of the eye of the user in the visual sensing data,
• wherein the determining of the viewing area and the non-viewing area includes:
• determining a size of a visual area corresponding to the viewing angle of the user based on the second visual information,
• wherein the size of the visual area is detected using a distance between the display area and a certain point at a retina of the eye of the user in which an image is focused, and the viewing angle of the user estimated from a size of the pupil,
• wherein, in the generating of the visual sensing data, the visual sensing data is generated in each of a first frame and a second frame consecutive to the first frame when at least one of a change in size of the pupil of the user or a change in position of the pupil of the user is sensed, and the second image signal corresponding to the first frame is generated based on the visual sensing data generated in the first frame and the second image signal corresponding to the second frame is generated based on the visual sensing data generated in the second frame, and
• wherein, in the generating of the visual sensing data, the visual sensing data is generated and provided to the image converter in the first frame and is not provided to the image converter in the second frame when neither of the change in size of the pupil of the user nor the change in position of the pupil of the user is sensed, and the image converter generates the second image signal corresponding to the first frame based on the visual sensing data generated in the first frame and generates the second image signal corresponding to the second frame based on the visual sensing data generated in one of the first and second frames.