Induction heating device providing improved user experience and user interface

An induction heating device, comprising:

• a case;
• a plurality of working coils provided in the case;
• a cover plate coupled to an upper end of the case, the cover plate having an upper surface configured to support a first object to be heated by at least one of the plurality of working coils;
• an input interface that is flatly buried into the upper surface of the cover plate, that is configured to receive a touch input from a user, and that is configured to display a specific image;
• a first control module configured to sense which one of the plurality of working coils has the first object at an upper side thereof;
• and
• a second control module that is configured to receive information on a position of the sensed first object from the first control module, that is configured to receive the touch input from the input interface, and that is configured to control the specific image displayed on the input interface based on at least one of the received information on the position of the first object or the received touch input,
• wherein the input interface is configured to display an object guide image that is configured to receive the touch input for heating a second object to be heated on a portion of the upper surface of the cover plate, wherein a size of the second object is smaller than a size of the first object,
• wherein the second control module is configured to, based on the touch input being received at the object guide image, control the input interface to display, before the user places the second object on the upper surface of the cover plate, an image indicating an optimal heating position of the second object in one area of the input interface that does not overlap with the position of the sensed first object, and
• wherein the optimal heating position represents a position on the upper surface of the cover plate for the user to place the second object among areas where the first object is not placed such that the second object is concentrically placed at the upper side of one of the plurality of working coils.