| 摘要 |
An electrical circuitry related to the user interface of an electrical device, whereby the circuitry comprises key members for generating input signals (103), and two sub-circuitries, of which the first one (102) is arranged to generate said input signals when said key members are pressed. This electrical circuitry is characterised in that said key members comprise second key members for generating a control signal (109), and that said first sub-circuitry (102) is arranged to generate a certain delay signal when said second key members are pressed in a certain manner, and to deactivate said delay signal when certain key members belonging to the second key members are not pressed anymore. Further said electrical circuitry is characterised in that the second sub-circuitry (105) comprises a delay block (106) which is arranged to activate a certain generating signal (108), if the activation time of said delay signal exceeds a certain threshold time, and a control signal generating block (107) which is arranged to generate a control signal when said generating signal is activated. <IMAGE> |
