A water and/or airtight electrical socket for portable electronic devices includes sealing elements that are shaped like an arc, and arranged to seal only a portion of the perimeter of the socket-plug interface. When this arc element experiences pressure, it will mechanically relay the force caused by the pressure only to that section of the perimeter of the socket-plug interface that it is arranged to seal. It will not relay mechanical forces any further. This way, the mechanical effect of any extra asymmetric pressure will simply be limited to increasing the pressure of the seal in the perimeter section of that particular sealing element, thereby tightening the seal further still. This allows the socket opening to be sealed in a water- and/or airtight manner even in asymmetric pressure conditions, both when there is no plug in the socket and also when a plug is inside the socket.
Information is browsed on a display device of a hand-held device naturally and logically essentially in a mirror-like way when the portion of the virtual data object displayed on the display device is moved in the same direction as the hand-held device is tilted. That is, the movements of the portion of the virtual data object displayed on the display device depends on the orientation of the hand-held device. A certain orientation of the hand-held device always displays the same portion of the virtual data object on the display device. The browsing method described above is extremely logical, and the movements and responses to the movements are natural.
The invention relates to an electrical socket (110) that is water and/or airtight. In particular, the invention relates to a water and/or airtight electrical socket (110) for portable electronic devices (500). The invention involves sealing elements (200, 210, 220 and 230) that are shaped like an arc, and arranged to seal only a portion of the perimeter of the socket-plug interface (300, 310). When this arc element experiences pressure, it will mechanically relay the force caused by the pressure only to that section of the perimeter of the socket-plug interface (300, 310) that it is arranged to seal. It will not relay mechanical forces any further. This way, the mechanical effect of any extra asymmetric pressure will simply be limited to increasing the pressure of the seal in the perimeter section of that particular sealing element (200, 210, 220 and 230), thereby tightening the seal further still. The methods and arrangements of the invention allow the socket opening (100) to be sealed in an water- and/or airtight manner even in asymmetric pressure conditions, for example when pressed with fingers, both when there is no plug (700) in the socket (110) and also when a plug (700) is inside the socket (110).
A user operable device for control of or communication with an electric appliance, in particular a user operable pointing device such as a mouse, including electrical components and circuits including sensor elements, processing elements and wireless communication elements for detecting movements including at least rotational movements of the device, producing data related to the movements and transmitting the data to the electric appliance, is characterised in that the device (1) is essentially a ball (2) including outer surface (2') for free rolling and for receiving influences of physical effects on the surface and the device, and that the electrical components and circuits (3, 4, 5, 6, 7, 8, 9, 10) are inside the ball (2) in integrated relationship with the ball. The invention concerns also a user interface including the user operable device of the invention.
The invention discloses a system for determining at least one point of application of force on a surface element. The system comprises a surface element (102, 202) having an effective mass, at least one sensor (104, 204) configured to measure force applied on the surface element (102, 202) at least one acceleration sensor (106, 206) configured to measure acceleration in at least one direction, and a processing unit (108, 210) configured to receive, from the at least one sensor (104, 204), signals indicating force applied on the surface element (102, 202), to receive, from the at least one acceleration sensor (106, 206), signals indicating acceleration, to filter out a disturbing force, determined based on acceleration signals and the effective mass of the surface element (102, 202), from the signals indicating the force applied on the surface element (102, 202), and to determine, based on the filtered signals, at least one point of application of force on the surface element (102, 202).