Display device

Abstract

A display device with low power consumption is provided. Furthermore, a display device in which an image is displayed in a region that can be used in a folded state is provided. The conceived display device includes a display portion that can be opened and folded, a sensing portion that senses a folded state of the display portion, and an image processing portion that generates, when the display portion is in the folded state, an image in which a black image is displayed in part of the display portion.

1 . A display device comprising:
 a display portion having a flexibility, the display portion comprising:
 a first region exposed outward when the display device is folded; and 
 a second region folded inward when the display device is folded; 
   a first driver circuit electrically connected to the display portion;   a sensing portion configured to sense a state of the display portion and supply data on whether the display device is folded; and   a control portion configured to control the first driver circuit so that, when the sensing portion detects that the display device is folded, the first driver circuit supplies an image signal for displaying an image to the first region while the first driver circuit supplies a signal for displaying a black image to the second region.   
     
     
         2 . The display device according to  claim 1 , wherein the display portion comprises a light-emitting element. 
     
     
         3 . The display device according to  claim 1 , wherein the display portion comprises a transistor comprising an oxide semiconductor layer. 
     
     
         4 . The display device according to  claim 3 , wherein the oxide semiconductor layer comprises indium and zinc. 
     
     
         5 . The display device according to  claim 1 , comprising a touch sensor over the display portion. 
     
     
         6 . The display device according to  claim 1 , comprising a sign operationally coupled to the sensing portion. 
     
     
         7 . The display device according to  claim 6 , wherein the sign is a magnet. 
     
     
         8 . A display device comprising:
 a display portion having a flexibility, the display portion comprising:
 a first region exposed outward when the display device is folded; and 
 a second region folded inward when the display device is folded; 
   a first driver circuit electrically connected to the first region of the display portion;   a second driver circuit electrically connected to the second region of the display portion;   a sensing portion configured to sense a state of the display portion and supply data on whether the display device is folded; and   a control portion configured to control the first driver circuit so that, when the sensing portion detects that the display device is folded, the first driver circuit supplies an image signal for displaying an image to the first region while the second driver circuit supplies a signal for displaying a black image to the second region.   
     
     
         9 . The display device according to  claim 8 , wherein the display portion comprises a light-emitting element. 
     
     
         10 . The display device according to  claim 8 , wherein the display portion comprises a transistor comprising an oxide semiconductor layer. 
     
     
         11 . The display device according to  claim 10 , wherein the oxide semiconductor layer comprises indium and zinc. 
     
     
         12 . The display device according to  claim 8 , comprising a touch sensor over the display portion. 
     
     
         13 . The display device according to  claim 8 , comprising a sign operationally coupled to the sensing portion. 
     
     
         14 . The display device according to  claim 13 , wherein the sign is a magnet. 
     
     
         15 . A display device comprising:
 a display portion having a flexibility, the display portion comprising:
 a first region exposed outward when the display device is folded; and 
 a second region folded inward when the display device is folded; 
   a first driver circuit electrically connected to the first region of the display portion;   a second driver circuit electrically connected to the second region of the display portion;   a power supply portion connected to the first driver circuit and the second driver circuit;   a sensing portion configured to sense a state of the display portion and supply data on whether the display device is folded; and   a control portion configured to control the power supply portion so that the power supply portion stops supplying a power supply potential when the sensing portion detects that the display device is folded.   
     
     
         16 . The display device according to  claim 15 , wherein the display portion comprises a light-emitting element. 
     
     
         17 . The display device according to  claim 15 , wherein the display portion comprises a transistor comprising an oxide semiconductor layer. 
     
     
         18 . The display device according to  claim 17 , wherein the oxide semiconductor layer comprises indium and zinc. 
     
     
         19 . The display device according to  claim 15 , comprising a touch sensor over the display portion. 
     
     
         20 . The display device according to  claim 15 , comprising a sign operationally coupled to the sensing portion. 
     
     
         21 . The display device according to  claim 20 , wherein the sign is a magnet.