Patent ID: 8791908

Claim:
A touch panel comprising: a first substrate; a second substrate that is spaced apart from the first substrate by a gap, the second substrate comprising a touch surface; an electro-rheological fluid that is filled in a gap between the first substrate and the second substrate; a sensor that senses an input on the touch surface and determines an input location at which the input occurs; and a controller that varies a viscosity of the electro-rheological fluid in a location corresponding to a peripheral region of the input location in relation to a viscosity of the electro-rheological fluid in a location corresponding to the input location, and wherein the controller determines whether the input is a continuous input based on the input location, and, when the input is determined to be a continuous input, varies the viscosity of electro-rheological fluid in a location corresponding to a peripheral region of a latest input location among input locations determined by the sensing unit.