A keyboard that can yield a favorable keying feeling to a user is disclosed. The keyboard includes multiple keys, a pressure sensor configured to sense a pressure used for pressing a key, a haptic device configured to generate haptic feedback that involves a micro vibration, and a feedback control unit configured to issue a signal used for driving the haptic device according to the pressure that the pressure sensor has sensed. In response to one-time key pressing, the feedback control unit issues a drive signal for generating a first haptic feedback when the pressure that the pressure sensor has sensed reaches a first threshold value, and a drive signal for generating a second haptic feedback when the pressure that the pressure sensor has sensed reaches a second threshold value.
1. A keyboard comprising:
a plurality of keys;
a pressure sensor senses pressure from one of said plurality of keys being pressed;
a feedback control unit issues:
a first drive signal in response to said sensed pressure reaching a first pressure threshold value, and
a second drive signal in response to said sensed pressure reaches a second threshold value after reaching said first threshold value; and
a haptic device generates a first haptic feedback in response to a receipt of said first drive signal, and a second haptic feedback in response to a receipt, of said second drive signal; wherein,
said feedback control unit does not issue said second drive signal when said sensed pressure reaches said second threshold value in less than a predetermined time from the time that said first drive signal is issued.
2. The keyboard of claim 1 , wherein said second threshold value is lower than said first threshold value.
3. The keyboard of claim 1 , wherein said pressure sensor locates between said plurality of keys and said haptic device.
4. The keyboard of claim 1 , wherein said pressure sensor locates underneath said plurality of keys.
5. The keyboard of claim 4 , wherein said haptic device locates underneath said pressure sensor.
6. The keyboard of claim 1 , wherein said first and second haptic feedbacks include micro vibrations.