Touch-sensitive device
First Claim
1. A user/machine interface comprising a panel having a surface, the panel being capable of supporting bending waves, a touch-sensitive input device associated with the surface, means including a force transducer for providing force feedback to the input device, the force being in the form of pulses to the panel, the pulses being in the form of a modulated signal whereby a button click sensation is provided to the user'"'"'s finger tip, where the modulated signal has a dominant carrier frequency in the range 150 to 750 Hz and being of a duration of at least 10 ms.
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Accused Products
Abstract
A user/machine interface comprising a panel having a surface, the panel being capable of supporting bending waves, a touch-sensitive input device associated with the surface, and means including a force transducer for providing force feedback to the input device. The force is in the form of pulses to the panel, the pulses being in the form of a modulated signal shaped as a damped sinusoid whereby a button click sensation is provided to the user'"'"'s finger tip. The modulated signal may be produced by a narrow-band sine wave having a carrier frequency in the range 150 to 750 Hz and being of a duration of at least 10 ms.
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Citations
17 Claims
- 1. A user/machine interface comprising a panel having a surface, the panel being capable of supporting bending waves, a touch-sensitive input device associated with the surface, means including a force transducer for providing force feedback to the input device, the force being in the form of pulses to the panel, the pulses being in the form of a modulated signal whereby a button click sensation is provided to the user'"'"'s finger tip, where the modulated signal has a dominant carrier frequency in the range 150 to 750 Hz and being of a duration of at least 10 ms.
Specification