Patent ID: 7106316

Claim:
A portable information terminal comprising a display device comprising: a pixel portion in which (m×2n) pixels are arranged in matrix form (both m and n are natural numbers); a source driver for supplying video signals to 2n source signal lines S 1 , S 2 , . . . , Sn, Sn+1, Sn+2, . . . , S2n; a first gate driver for supplying selection signals to m first gate signal lines G 1 L, G 2 L, GrL, . . . , GmL (1≦r≦m); and a second gate driver for supplying selection signals to m second gate signal lines G 1 R, G 2 R, . . . , GrR, . . . , GmR (1≦r≦m), wherein each of the (m×2n) pixels comprises a display element and a thin film transistor electrically connected to the display element; wherein the pixels connected to the source signal lines S 1 , S 2 , . . . , Sn are supplied with the selection signals from the first gate signal lines G 1 L, G 2 L, . . . , GrR, . . . , GmL; wherein the pixels connected to the source signal lines Sn+1, SN+2, . . . , S2n are supplied with the selection signals from the second gate signal lines G 1 R, G 2 R, . . . , GrR, . . . , GmR; wherein the selection signal starts to be supplied to the second gate signal line G 1 R GrR while the selection signal is supplied to the first gate signal line G 1 L GrL; wherein the selection signal starts to be supplied to the first gate signal line G 2 L Gr+ 1 L while the selection signal is supplied to the second gate signal line G 1 R GrR, wherein the selection signal to the first gate signal line Gr+ 1 L rises to a static state after the selection signal to the first signal line GrL falls, and wherein the selection signal to the first gate signal line Gr+ 1 R rises to the static state after the selection signal to the first signal line GrR falls.