Tactile presentation device, tactile presentation touch panel, and tactile presentation touch display

A tactile presentation device in which a tactile presentation knob is disposed on an operation surface to present tactile to a user via the tactile presentation knob, the tactile presentation device comprising:

• a touch detection circuit detecting the user having contact with the tactile presentation knob and detecting a position of the tactile presentation knob on the tactile presentation device to output the position as positional information;
• a pressure detection circuit detecting an amount of pressing of the operation surface performed by the user via the tactile presentation knob and outputting the amount of pressing as pressing information;
• a tactile control circuit determining a voltage signal generating friction force between the tactile presentation knob and the operation surface based on the positional information outputted from the touch detection circuit and pressing information outputted from the pressure detection circuit;
• and
• a pressure amount calculation circuit calculating a pressure amount based on the amount of pressing detected in the pressure detection circuit and adding the pressure amount to the pressing information, wherein
• generated is tactile caused by a change of the friction force between the tactile presentation knob and the operation surface by the voltage signal determined by the tactile control circuit, and
• the pressure detection circuit detects the amount of pressing of the operation surface via the tactile presentation knob so that the friction force between the tactile presentation knob and the operation surface generated by the voltage signal becomes constant.