A touch sensitive display device is capable of forming a physical button, and includes: a touch sensitive display including a display face, for performing display based on display data on the display face; and a light-transmissive first film disposed on the display face of the touch sensitive display, and including a first part and a second part that is formed from a resilient material, the first part being disposed on the display face, the second part cooperating with the display face to define a first containing chamber, that is convertible between a contracted state and an expanded state, in which the second part protrudes relative to the first part such that the second part is more distinguishable from the first part by touch when compared to the contracted state, based on the display data.