Lg Electronics Inc.

Yong Taek Gong

Kyung Min Lee

Tae Hoon Lee

An operation method of a portable terminal according to an embodiment of the present invention comprises the steps of: entering a window screen movement mode in which a window screen of a foreground task is displayed uppermost and one or more window screens are stacked in multiple layers under the window screen of the foreground task; selecting a window screen from a plurality of window screens according to a user's movement command; changing the transparency of at least a part of areas of window screens stacked on the selected window screen; and displaying the selected window screen as a foreground screen and terminating the window screen movement mode when an input determining the selected window screen is received. Therefore, it is possible to switch screens and tasks more swiftly and conveniently, thereby improving user convenience.

Operation method of portable terminal

An image display apparatus and a method for operating the same are disclosed. The method for operating an image display apparatus includes setting a position and size of a first undo/redo region based on a gaze of a user if the gaze of the user is to a first position, displaying the set first undo/redo region, extending the first undo/redo region based on movement of the gaze of the user if the gaze of the user is moved from the first position to a second position, displaying a second undo/redo region obtained by extending the first undo/redo region, reducing the size of the second undo/redo region if a time when the gaze of the user is to the second position exceeds a predetermined time, and displaying a third undo/redo region obtained by reducing the second undo/redo region.

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Seoul, South Korea

Yong Taek Gong