Input device using gaze tracking

An input device implemented by an electronic device including at least one of a smart TV, a smartphone, a personal digital assistant (PDA), a personal computer, a laptop computer, a virtual reality device worn on a user's head, a smart glass, and a head-up display (HUD), comprising:

• a display unit configured to display, on a screen, a plurality of keys having a display region displaying a character and a recognition region visually distinguished from the display region, wherein the recognition region corresponding to the display region is apart from the display region on the screen, and the display unit includes at least one of a liquid crystal display (LCD), an organic light-emitting diode (OLED) display, a cathode ray tube (CRT), and a plasma display;
• a gaze tracking unit executed by a hardware device, the gaze tracking unit configured to calculate a gaze position of a user on the screen;
• and
• an input unit executed by the hardware device,
• wherein the input unit is configured to determine that a character displayed in a display region of a particular key from among the plurality of keys has been inputted when the gaze position exists inside a recognition region of the particular key from among the plurality of keys;
• the input unit is configured not to determine that the character displayed in the display region of the particular key from among the plurality of keys has been inputted when the gaze position exists inside the display region of the particular key from among the plurality of keys;
• and
• each key includes the display region and the recognition region respectively, and the display unit displays the display region and the recognition region of each key on the screen at the same time so that multiple keys sequentially have been inputted directly by the user without converting the screen;
• and
• wherein, when the gaze position of the user exists at a point within a predetermined range from the recognition region of the particular key from among the plurality of keys for a predetermined time or longer, the display unit moves the gaze position to a center of the recognition region of the particular key from among the plurality of keys.