Patent ID: 7777137

Claim:
A tactile transmission device for transmitting shape information of an image using a rheological fluid, which is constructed to transmit shape information of various images displayed on a screen to a user so that the user feels the shape information through tactile sensation, the tactile transmission device comprising: a plurality of cells arranged at regular intervals, and each having a storage space therein; a contact member installed in each of the cells, an upper portion of the contact member protruding out of the cell; an elastic member installed in each of the cells, and biasing the contact member upwards; a sensor installed in each of the cells, and measuring displacement of the contact member; a magneto-rheological fluid contained in each of the cells; a coil installed in each of the cells and adapted to generate a magnetic field in the cell; and a control means comparing a shape information value of the image with a displacement value of the contact member output from the sensor, thus controlling a quantity of current applied to the coil.