Patent ID: 7696952

Claim:
A display device capable of displaying a first screen and a second screen, and comprising a pixel comprising: a display element; a first signal line that inputs a signal for the first screen to the display element; a first scanning line provided so as to intersect the first signal line; a second signal line that inputs a signal for the second screen to the display element; a second scanning line provided so as to intersect the second signal line; means for selecting one of the first signal line and the second signal line; and a compression circuit that controls a size of one of the first screen and the second screen, wherein the compression circuit comprises plural first memories, a first control circuit that selects the first memory, plural second memories, and a second control circuit that selects the second memory, wherein one of the first memories which is selected by the first control circuit and one of the second memories which is selected by the second control circuit are brought into a conductive state, and wherein a signal is transferred from the first memory to the second memory in the conductive state, and the signal is inputted from the second memory to a pixel portion.