Touch panel and handheld electronic device

Abstract

A touch panel including a first transparent flexible substrate, a plurality of first connection lines, a plurality of second connection lines, a first sensing layer, and a second sensing layer is provided. The first transparent flexible substrate has a first side and a second side and includes a first carrying portion and a first leading portion. The first connection lines and the second connection lines are respectively disposed at the first side and the second side and are extended from the first carrying portion to the first leading portion. The first sensing layer and the second sensing layer have plural transparent electrode patterns and are respectively disposed at the first side and the second side of the first carrying portion. The transparent electrode patterns are respectively connected with the first connection lines and the second connection lines. A handheld electronic device with a touch input function is also provided.

What is claimed is: 
     
         1 . A touch panel, comprising:
 a first transparent flexible substrate, having a first side and a second side opposite to the first side, and comprising a first carrying portion and a first leading portion connected to an edge of the first carrying portion;   a plurality of first connection lines, disposed at the first side, and extended from the first carrying portion to the first leading portion;   a plurality of second connection lines, disposed at the second side, and extended from the first carrying portion to the first leading portion;   a first sensing layer, attached to the first side of the first transparent flexible substrate and comprising a plurality of first transparent electrode patterns disposed at the first carrying portion, wherein the first connection lines are located between the first sensing layer and the first transparent flexible substrate, the first connection lines cover a portion of the first sensing layer and are led out of the first sensing layer through the first leading portion, and the first transparent electrode patterns are respectively connected with the first connection lines; and   a second sensing layer, attached to the second side of the first transparent flexible substrate and comprising a plurality of second transparent electrode patterns disposed at the first carrying portion, wherein the second connection lines are located between the second sensing layer and the first transparent flexible substrate, the second connection lines cover a portion of the second sensing layer and are led out of the second sensing layer through the first leading portion, and the second transparent electrode patterns are respectively connected with the second connection lines.   
     
     
         2 . The touch panel according to  claim 1  further comprising:
 a transparent cover, adhered on the first sensing layer; and 
 an adhesive layer, disposed between the transparent cover and the first sensing layer. 
 
     
     
         3 . The touch panel according to  claim 1 , wherein a material of the first transparent flexible substrate comprises a polymer. 
     
     
         4 . The touch panel according to  claim 1 , wherein a material of the first connection lines and the second connection lines comprises a metal or a transparent conductive material. 
     
     
         5 . The touch panel according to  claim 1 , wherein the first connection lines and the second connection lines are disposed along an edge of the first carrying portion. 
     
     
         6 . The touch panel according to  claim 1 , wherein the first transparent electrode patterns and the second transparent electrode patterns are respectively striped patterns, and an extended direction of the first transparent electrode patterns is substantially perpendicular to an extended direction of the second transparent electrode patterns. 
     
     
         7 . The touch panel according to  claim 1 , wherein a material of the first transparent electrode patterns and the second transparent electrode patterns comprises a transparent conductive material. 
     
     
         8 . A handheld electronic device, comprising:
 a body, having a display opening;   a main processor system, disposed in the body;   a display panel, disposed at the display opening, and electrically connected to the main processor system; and   the touch panel according to  claim 1 , disposed on the display panel.