Abstract: Provided is a portable display device sufficiently small to be held with one hand that enters a state for accepting a gesture when a fixed coordinate position near a central portion between a left display unit (14a) and a right display unit (14b) is pressed with a thumb Ftl of one hand holding the device, and accepts a command for performing such as page flipping processing based on a gesture inputted with an index finger Ffr of the other hand. Thus, it is possible to achieve an interface for input operations suitable for a two-screen display screen, where holding a two-screen portable display device naturally causes the device to enter a command accepting state to allow gesture recognition, and to enter a command non-accepting state when the portable display device is not held, in order to prevent a command from being falsely executed due to an unintended contact and such to the display screen.

Abstract: Provided is a portable display device sufficiently small to be held with one hand that enters a state for accepting a gesture when a fixed coordinate position near a central portion between a left display unit (14a) and a right display unit (14b) is pressed with a thumb Ftl of one hand holding the device, and accepts a command for performing such as page flipping processing based on a gesture inputted with an index finger Ffr of the other hand. Thus, it is possible to achieve an interface for input operations suitable for a two-screen display screen, where holding a two-screen portable display device naturally causes the device to enter a command accepting state to allow gesture recognition, and to enter a command non-accepting state when the portable display device is not held, in order to prevent a command from being falsely executed due to an unintended contact and such to the display screen.

Abstract: A display surface of the present invention includes a display operation surface (2) including an input operation surface (2a) that constitutes at least a part of the display operation surface (2), the input operation surface (2a) being configured to be directly touched by a user so that an input operation is performed, the input operation surface (2a) having a first region (3) and a second region (4) which are provided in a single substrate, the first region (3) being planar and substantially flat, and the second region (4) being protruded and/or recessed with respect to a reference plane which is an input surface the first region (3). It is therefore possible to realize (i) a touch panel which has further improved operator's operability and is provided to an electronic device having multi-functions, (ii) a display device including the touch panel, and (iii) an electronic device including the touch panel.