US2017323906A1PendingUtilityA1

Display device

61
Assignee: JAPAN DISPLAY INCPriority: May 6, 2016Filed: Apr 5, 2017Published: Nov 9, 2017
Est. expiryMay 6, 2036(~9.7 yrs left)· nominal 20-yr term from priority
Inventors:Yohei YamaguchiIsao SuzumuraHidekazu Miyake
G02F 1/1368G02F 2202/104G02F 2201/123G02F 1/136227H01L 27/3262H01L 27/1225H01L 27/124H01L 27/3276H01L 27/1251H10D 86/471H10D 86/441H10D 86/427H10D 86/425H10D 86/423H10D 86/0221H10D 86/60H10D 86/421H10D 86/0231H10D 30/6756H10K 59/1213H10K 59/12H10K 59/131
61
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Claims

Abstract

The invention allows formation of LTPS TFTs and TAOS TFTs on the same substrate. The invention provides a display device including a substrate having a display area in which pixels are formed. The pixels include a first TFT made of a TAOS. The drain of the first TFT is formed of first LTPS 112 . The source of the first TFT is formed of second LTPS 113 . The first LTPS 112 is connected to a first electrode 106 via a first through-hole 108 formed in an insulating film 105 covering the first TFT. The second LTPS 113 is connected to a second electrode 107 via a second through-hole 108 formed in the insulating film 105 covering the first TFT.

Claims

exact text as granted — not AI-modified
What is claimed is: 
     
         1 . A display device comprising a substrate having a display area in which pixels are formed, wherein
 the pixels include a first TFT made of an oxide semiconductor,   the drain of the first TFT is formed of first polysilicon,   the source of the first TFT is formed of second polysilicon,   the first polysilicon is connected to a first electrode via a first through-hole formed in an insulating film covering the first TFT, and l   the second polysilicon is connected to a second electrode via a second through-hole formed in the insulating film covering the first TFT.   
     
     
         2 . The display device of  claim 1 , wherein
 the substrate further includes a driver circuit outside the display area, and   the driver circuit includes a second TFT made of polysilicon.   
     
     
         3 . The display device of  claim 1 , wherein the first TFT is an n-MOS TFT. 
     
     
         4 . The display device of  claim 2 , wherein the second TFTs include an n-MOS TFT and a p-MOS TFT. 
     
     
         5 . The display device of  claim 1 , wherein the display area further includes a second TFT made of polysilicon. 
     
     
         6 . The display device of  claim 2 , wherein the driver circuit further includes the first TFT. 
     
     
         7 . The display device of  claim 1 , wherein the display device is a liquid crystal display device. 
     
     
         8 . The display device of  claim 1 , wherein the display device is an organic EL display device. 
     
     
         9 . A display device comprising a substrate having a display area in which pixels are formed, wherein
 the pixels include a first TFT made of an oxide semiconductor,   the drain of the first TFT is formed of first polysilicon,   the source of the first TFT is formed of second polysilicon,   the first polysilicon is connected to a first electrode via a first through-hole formed in an insulating film covering the first TFT,   the second polysilicon is connected to a second electrode via a second through-hole formed in the insulating film covering the first TFT, and   a p-n junction is formed between the first polysilicon and the oxide semiconductor or between the second polysilicon and the oxide semiconductor.   
     
     
         10 . The display device of  claim 9  wherein the substrate further includes a driver circuit outside the display area, the driver circuit having a second TFT made of polysilicon. 
     
     
         11 . The display device of  claim 9 , wherein the first TFT is an n-MOS TFT. 
     
     
         12 . The display device of  claim 10 , wherein the second TFT include an n-MOS TFT and a p-MOS TFT. 
     
     
         13 . The display device of  claim 9 , wherein the display area further includes the second TFT. 
     
     
         14 . The display device of  claim 10 , wherein the driver circuit further includes the first TFT. 
     
     
         15 . The display device of  claim 9 , wherein the display device is a liquid crystal display device. 
     
     
         16 . The display device of  claim 9 , wherein the display device is an organic EL display device.

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