Haptic interface providing improved control of the haptic sensation

A haptic interface comprising:

• a user interaction element for interacting with a user configured to move in a first direction and in a second direction;
• a fluid interaction element for interacting with a fluid, viscosity whereof varies according to an external stimulus, the fluid interaction element being secured at least in translation or at least in rotation with the user interaction element;
• a brake comprising a fluid, viscosity whereof varies according to a brake external stimulus, and a generation system for generating the brake external stimulus on command in the fluid, the fluid interaction element being arranged in the fluid;
• a current position sensor for determining a current position of the user interaction element;
• a speed sensor for determining speed of the user interaction element;
• a control circuitry configured to send orders to the system to generate each stimulus, the control circuitry comprising means for generating the orders according to the current position of the user interaction element and the current actuation speed of the user interaction element;
• means for determining the user's intended action on the user interaction element, comprising a torque sensor to detect torque or force applied by the user to the user interaction element, in a case of a rotatable user interaction element, to determine direction of the torque and whether the torque is greater than a given value for a given direction, the control circuitry controlling the generation system for generating the stimulus on the basis of the information obtained on the torque at least when a zero or low speed of the user interaction element is detected, or a load sensor to detect load applied by a user to the user interaction element, in a case of a translatable element for interacting with the user, to determine the direction of the force and whether the force is greater than a given value for a given direction, the control circuitry controlling the generation system to generate each stimulus on the basis of the information obtained on the force at least when a zero or low speed of the user interaction element is detected,
• wherein the control circuitry comprises:
• a first database containing values of a first haptic pattern when norm of the actuation speed is less than or equal to a first given value and the user interaction element is moved in the first direction,
• a second database containing values of a second haptic pattern when the norm of the actuation speed is at least equal to a second given value and the user interaction element is moved in the first direction,
• a third database containing values of a third haptic pattern when the norm of the actuation speed is less than or equal to a third given value and the user interaction element is moved in the second direction,
• a fourth database containing values of a fourth haptic pattern when the norm of the actuation speed is at least equal to a fourth given value and the user interaction element is moved in the second direction;
• and
• wherein the means for generating orders uses, according to a direction of actuation of the user interaction element, the first and/or second databases or the third and/or fourth databases to determine a value of a new haptic pattern on the basis whereof an order is generated.