| 摘要 |
An electronic device including a touchless user interface which comprises an optical sensing arrangement having a field of view extending in a divergent manner therefrom and a processing system arranged to process signals from said optical sensor arising from a first movement executed by a user's hand in said field of view and detects the first movement. The touchless user interface further comprises: at least one ultrasonic transmitter transmitting ultrasonic interrogation signals; and at least one ultrasonic receiver receiving reflections of said ultrasonic interrogation signals from said user's hand. The processing system is further arranged to process signals from said ultrasonic receiver arising from a second movement executed by the user's hand outside said field of view and detects the second movement. The processing system is arranged to carry out a function of said device associated with one or both of said first and second movements. |
