The widespread use and application of in-plane switching liquid crystal displays (IPS-LCDs) is limited by their slow response. In this letter, a fast-response IPS-LCD with a protrusion structure is proposed. The gray-to-gray response time of the IPS-LCD is reduced by 20% to 30%. The difference in cell gap induced by the protrusion accounts for the faster response. Moreover, the viewing angle and gamma shift of the proposed IPS-LCD are simulated and found to be better than that of conventional IPS-LCDs.