Touch panel

Abstract

To increase the detection sensitivity of a touch panel, provide a thin touch panel, provide a foldable touch panel, or provide a lightweight touch panel. A display element and a capacitor forming a touch sensor are provided between a pair of substrates. Preferably, a pair of conductive layers forming the capacitor each have an opening. The opening and the display element are provided to overlap each other. A light-blocking layer is provided between a substrate on the display surface side and the pair of conductive layers forming the capacitor.

1 . A touch panel comprising:
 a first substrate;   a second substrate;   a first conductive layer having a first opening;   a second conductive layer having a second opening; and   a first light-emitting element and a second light-emitting element between the first substrate and the second substrate,   wherein the first conductive layer and the second conductive layer form a capacitor,   wherein the first opening and whole of the first light-emitting element overlap with each other,   wherein the second opening and whole of the second light-emitting element overlap with each other, and   wherein the first conductive layer and the second conductive layer are positioned between the second substrate and at least one of the first light-emitting element and the second light-emitting element.   
     
     
         2 . The touch panel according to  claim 1 , wherein a time constant of at least one of the first conductive layer and the second conductive layer is greater than 0 s and less than or equal to 1×10 −4  s. 
     
     
         3 . The touch panel according to  claim 1 , wherein an aperture ratio of at least one of the first conductive layer and the second conductive layer is greater than or equal to 20% and less than 100%. 
     
     
         4 . The touch panel according to  claim 1 , further comprising:
 a third conductive layer provided closer to the first substrate than at least one of the first conductive layer and the second conductive layer,   wherein at least one of a first distance between the first conductive layer and the third conductive layer and a second distance between the second conductive layer and the third conductive layer is greater than or equal to 25 nm and less than or equal to 50 nm.   
     
     
         5 . The touch panel according to  claim 1 , further comprising:
 a first insulating layer,   wherein the first conductive layer and the second conductive layer overlap with each other, and   wherein the first insulating layer is positioned between the first conductive layer and the second conductive layer.   
     
     
         6 . The touch panel according to  claim 1 , further comprising:
 a fourth conductive layer; and   a second insulating layer having a third opening,   wherein the fourth conductive layer and the second conductive layer overlap with each other,   wherein the second insulating layer is positioned between the first conductive layer and the fourth conductive layer,   wherein the second insulating layer is positioned between the second conductive layer and the fourth conductive layer, and   wherein the first conductive layer and the fourth conductive layer are electrically connected to each other through the third opening.   
     
     
         7 . The touch panel according to  claim 1 , further comprising:
 a light-blocking layer between the second substrate and at least one of the first conductive layer and the second conductive layer,   wherein the first conductive layer and the light-blocking layer overlap with each other, and   wherein the second conductive layer and the light-blocking layer overlap with each other.   
     
     
         8 . A module comprising:
 the touch panel according to  claim 1 ; and   at least one of a flexible printed circuit and a tape carrier package.   
     
     
         9 . An electronic appliance comprising:
 the touch panel according to  claim 1 ; and   at least one of a battery, an antenna, a housing, an operation button, an external connection port, a speaker, and a microphone.   
     
     
         10 . A touch panel comprising:
 a first substrate;   a second substrate;   a first conductive layer having a first opening;   a second conductive layer having a second opening; and   a first light-emitting element and a second light-emitting element between the first substrate and the second substrate,   wherein the first conductive layer and the second conductive layer form a capacitor,   wherein the first opening and both of whole of the first light-emitting element and whole of the second light-emitting element overlap with each other, and   wherein the first conductive layer and the second conductive layer are positioned between the second substrate and at least one of the first light-emitting element and the second light-emitting element.   
     
     
         11 . The touch panel according to  claim 10 , wherein a time constant of at least one of the first conductive layer and the second conductive layer is greater than 0 s and less than or equal to 1×10 −4  s. 
     
     
         12 . The touch panel according to  claim 10 , wherein an aperture ratio of at least one of the first conductive layer and the second conductive layer is greater than or equal to 20% and less than 100%. 
     
     
         13 . The touch panel according to  claim 10 , further comprising:
 a third conductive layer provided closer to the first substrate than at least one of the first conductive layer and the second conductive layer,   wherein at least one of a first distance between the first conductive layer and the third conductive layer and a second distance between the second conductive layer and the third conductive layer is greater than or equal to 25 nm and less than or equal to 50 μm.   
     
     
         14 . The touch panel according to  claim 10 , further comprising:
 a first insulating layer,   wherein the first conductive layer and the second conductive layer overlap with each other, and   wherein the first insulating layer is positioned between the first conductive layer and the second conductive layer.   
     
     
         15 . The touch panel according to  claim 10 , further comprising:
 a fourth conductive layer; and   a second insulating layer having a third opening,   wherein the fourth conductive layer and the second conductive layer overlap with each other,   wherein the second insulating layer is positioned between the first conductive layer and the fourth conductive layer,   wherein the second insulating layer is positioned between the second conductive layer and the fourth conductive layer, and   wherein the first conductive layer and the fourth conductive layer are electrically connected to each other through the third opening.   
     
     
         16 . The touch panel according to  claim 10 , further comprising:
 a light-blocking layer between the second substrate and at least one of the first conductive layer and the second conductive layer,   wherein the first conductive layer and the light-blocking layer overlap with each other, and   wherein the second conductive layer and the light-blocking layer overlap with each other.   
     
     
         17 . A module comprising:
 the touch panel according to  claim 10 ; and   at least one of a flexible printed circuit and a tape carrier package.   
     
     
         18 . An electronic appliance comprising:
 the touch panel according to  claim 10 ; and   at least one of a battery, an antenna, a housing, an operation button, an external connection port, a speaker, and a microphone.