Touch input device

Abstract

A touch input device includes a touch sensor including a plurality of touch electrodes; a display panel; and a reference potential layer. The touch sensor is completely laminated with the display panel. When a touch pressure is applied, the touch sensor and the display panel are bent. The reference potential layer is disposed apart from the touch sensor. A touch position is detected based on a first capacitance which is detected from the touch electrode and is changed by an approach of an object to the touch sensor. A magnitude of the touch pressure is detected based on a second capacitance which is detected from the touch electrode and is changed according to a distance between the touch sensor and the reference potential layer.

What is claimed is: 
     
         1 . A touch input device comprising:
 a touch sensor comprising a plurality of touch electrodes;   a display panel; and   a reference potential layer,
 wherein the touch sensor is completely laminated with the display panel, 
 wherein, when a touch pressure is applied, the touch sensor and the display panel are bent, 
 wherein the reference potential layer is disposed apart from the touch sensor, 
 wherein a touch position is detected based on a first capacitance which is detected from the touch electrode and is changed by an approach of an object to the touch sensor, 
 and wherein a magnitude of the touch pressure is detected based on a second capacitance which is detected from the touch electrode and is changed according to a distance between the touch sensor and the reference potential layer. 
   
     
     
         2 . The touch input device of  claim 1 , wherein the reference potential layer is disposed on a position where the reference potential layer is not bent by the application of the touch pressure. 
     
     
         3 . The touch input device of  claim 2 , wherein the position where the reference potential layer is not bent is a position where the reference potential layer is relatively less bent than the touch sensor and the display panel. 
     
     
         4 . The touch input device of  claim 1 , further comprising:
 a driving signal supplier; and   a sensing unit,
 wherein the driving signal supplier applies a driving signal to the touch electrode, 
 and wherein the sensing unit receives a signal including both information on the first capacitance and information on the second capacitance from the touch electrode. 
   
     
     
         5 . The touch input device of  claim 1 , further comprising:
 a driving signal supplier; and   a sensing unit,
 wherein the driving signal supplier applies a driving signal to the touch electrode, 
 and wherein the sensing unit receives a signal including information on the first capacitance from the touch electrode in a first time interval and receives a signal including information on the second capacitance from the touch electrode in a second time interval. 
   
     
     
         6 . The touch input device of  claim 1 , further comprising:
 a driving signal supplier; and   a sensing unit,
 wherein the touch electrode comprises a driving electrode and a receiving electrode, 
 wherein the driving signal supplier applies a driving signal to the driving electrode, 
 and wherein the sensing unit receives a signal including information on the first capacitance and information on the second capacitance from the receiving electrode. 
   
     
     
         7 . The touch input device of  claim 1 , further comprising:
 a driving signal supplier; and   a sensing unit,
 wherein the touch electrode comprises a driving electrode and a receiving electrode, 
 wherein the driving signal supplier applies a driving signal to the driving electrode, 
 and wherein the sensing unit receives a signal including information on the first capacitance from the receiving electrode in a first time interval and receives a signal including information on the second capacitance from the receiving electrode in a second time interval. 
   
     
     
         8 . The touch input device of  claim 1 ,
 a driving signal supplier; and   a sensing unit,
 wherein the touch electrode comprises a first electrode, a second electrode, and a third electrode which is formed in the same layer as that in which the first electrode is formed, 
 wherein the driving signal supplier applies a driving signal to the first electrode, 
 wherein the sensing unit receives a first signal including information on the first capacitance from the second electrode and receives a second signal including information on the second capacitance from the third electrode. 
   
     
     
         9 . The touch input device of  claim 8 , wherein the sensing unit receives the first signal from the second electrode in a first time interval and receives the second signal from the third electrode in a second time interval. 
     
     
         10 . The touch input device of  claim 8 , wherein the sensing unit receives the first signal from the second electrode and the second signal from the third electrode at the same time. 
     
     
         11 . A touch input device comprising:
 a touch sensor comprising a plurality of touch electrodes;   a display panel; and   a reference potential layer,
 wherein the touch sensor is disposed within the display panel, 
 wherein, when a touch pressure is applied, the touch sensor and the display panel are bent, 
 wherein the reference potential layer is disposed apart from the touch sensor, 
 wherein a touch position is detected based on a first capacitance which is detected from the touch electrode and is changed by an approach of an object to the touch sensor, 
 and wherein a magnitude of the touch pressure is detected based on a second capacitance which is detected from the touch electrode and is changed according to a distance between the touch sensor and the reference potential layer. 
   
     
     
         12 . The touch input device of  claim 11 , wherein the reference potential layer is disposed on a position where the reference potential layer is not bent by the application of the touch pressure. 
     
     
         13 . The touch input device of  claim 12 , wherein the position where the reference potential layer is not bent is a position where the reference potential layer is relatively less bent than the touch sensor and the display panel. 
     
     
         14 . The touch input device of  claim 11 , further comprising:
 a driving signal supplier; and   a sensing unit,
 wherein the driving signal supplier applies a driving signal to the touch electrode, 
 and wherein the sensing unit receives a signal including both information on the first capacitance and information on the second capacitance from the touch electrode. 
   
     
     
         15 . The touch input device of  claim 11 , further comprising:
 a driving signal supplier; and   a sensing unit,
 wherein the driving signal supplier applies a driving signal to the touch electrode, 
 and wherein the sensing unit receives a signal including information on the first capacitance from the touch electrode in a first time interval and receives a signal including information on the second capacitance from the touch electrode in a second time interval. 
   
     
     
         16 . The touch input device of  claim 11 , further comprising:
 a driving signal supplier; and   a sensing unit,
 wherein the touch electrode comprises a driving electrode and a receiving electrode, 
 wherein the driving signal supplier applies a driving signal to the driving electrode, 
 and wherein the sensing unit receives a signal including information on the first capacitance and information on the second capacitance from the receiving electrode. 
   
     
     
         17 . The touch input device of  claim 11 , further comprising:
 a driving signal supplier; and   a sensing unit,
 wherein the touch electrode comprises a driving electrode and a receiving electrode, 
 wherein the driving signal supplier applies a driving signal to the driving electrode, 
 and wherein the sensing unit receives a signal including information on the first capacitance from the receiving electrode in a first time interval and receives a signal including information on the second capacitance from the receiving electrode in a second time interval. 
   
     
     
         18 . The touch input device of  claim 11 ,
 a driving signal supplier; and   a sensing unit,
 wherein the touch electrode comprises a first electrode, a second electrode, and a third electrode which is formed in the same layer as that in which the first electrode is formed, 
 wherein the driving signal supplier applies a driving signal to the first electrode, 
 wherein the sensing unit receives a first signal including information on the first capacitance from the second electrode and receives a second signal including information on the second capacitance from the third electrode. 
   
     
     
         19 . The touch input device of  claim 18 , wherein the sensing unit receives the first signal from the second electrode in a first time interval and receives the second signal from the third electrode in a second time interval. 
     
     
         20 . The touch input device of  claim 18 , wherein the sensing unit receives the first signal from the second electrode and the second signal from the third electrode at the same time.