Touch controller, electronic device and display device including touch controller, and touch sensing method

Abstract

A touch sensing device includes a touch screen panel including a touch sensor configured to generate a first electrical change corresponding to a touch and a touch controller configured to detect touch position data with respect to an area on the touch screen panel associated with the touch, based on the first electrical change of the touch sensor.

1 . A display device comprising:
 a touch screen panel including a plurality of sensing units; and   a touch controller configured:
 to detect first sensing values of the plurality of sensing units using a first touch sensing method when the display device is in a first mode; 
 to detect second sensing values of the plurality of sensing units using a second touch sensing method when the display device is in the first mode; and 
 to detect third sensing values of the plurality of sensing units using the second touch sensing method when the display device is in a second mode different from the first mode, 
   wherein the first touch sensing method is different from the second touch sensing method   
     
     
         2 . The display device of the  claim 1 , wherein the second sensing method is a mutual capacitance method. 
     
     
         3 . The display device of the  claim 1 , wherein the touch controller is configured to periodically check the touch screen panel whether a touch input is made. 
     
     
         4 . The display device of the  claim 3 , wherein the display device further comprises a display driving unit, and
 wherein the touch controller is configured to periodically check whether the touch input is made when the display driving unit is in a sleep state.   
     
     
         5 . The display device of the  claim 3 , wherein the touch controller is further configured to simultaneously apply a driving voltage to at least two of a plurality of sensing electrodes connected to the plurality of sensing units. 
     
     
         6 . The display device of the  claim 3 , wherein the touch controller is further configured to apply a driving voltage to a plurality of sensing electrodes connected to the plurality of sensing units row by row. 
     
     
         7 . The display device of the  claim 3 , wherein the touch controller is further configured to apply a driving voltage to a plurality of sensing electrodes connected to the plurality of sensing units column by column. 
     
     
         8 . The display device of the  claim 3 , wherein the first touch sensing method is a self-capacitance method. 
     
     
         9 . The display device of the  claim 3 , wherein the touch controller includes a driving and amplifying unit, and
 the driving and amplifying unit is configured to apply a first driving voltage to a plurality of sensing electrodes connected to the plurality of sensing units, and configured to apply a second driving voltage to the plurality of sensing electrodes.   
     
     
         10 . The display device of the  claim 9 , wherein the driving and amplifying unit is further configured to receive the first sensing values of the plurality of sensing units in response to the first driving voltage, and configured to receive the second sensing values of the plurality of the sensing units in response to the second driving voltage. 
     
     
         11 . A touch controller comprising:
 a driving and amplifying unit comprising a negative input and a positive input, the driving and amplifying unit being configured:
 to apply a first driving voltage to a plurality of sensing electrodes in a first mode; 
 to apply a second driving voltage to the plurality of sensing electrodes in a second mode different from the first mode; 
 to receive first sensing values of a plurality of sensing units connected to the plurality of the sensing electrodes in response to the first driving voltage; and
 to receive second sensing values of the plurality of the sensing units in response to the second driving voltage, 
 
   wherein the driving and amplifying unit is configured to apply the first driving voltage to the negative input, and configured to receive the first sensing value from the negative input.   
     
     
         12 . The touch controller of  claim 11 , wherein the driving and amplifying unit is further configured to detect the first sensing values using a first touch sensing method in the first mode, and configured to detect the second sensing values using a second touch sensing method different from the first touch sensing method in the second mode. 
     
     
         13 . The touch controller of  claim 12 , wherein the first sensing method is a self-capacitance method, and the second sensing method is a mutual capacitance method. 
     
     
         14 . The touch controller of  claim 13 , wherein the driving and amplifying unit is further configured to simultaneously apply the second driving voltage to at least two of the plurality of the sensing electrodes. 
     
     
         15 . The touch controller of  claim 13 , wherein the driving and amplifying unit is further configured to apply the second driving voltage to the plurality of the sensing electrodes row by row. 
     
     
         16 . The touch controller of  claim 13 , wherein the driving and amplifying unit is further configured to apply the second driving voltage to the plurality of the sensing electrodes column by column. 
     
     
         17 . The touch controller of  claim 13 , wherein the driving and amplifying unit is further configured to apply the second driving voltage to a portion of the plurality of the sensing electrodes based on the first sensing value. 
     
     
         18 . The touch controller of  claim 13 , wherein the touch controller is further configured to periodically check whether a touch input is made when a display panel is turned off. 
     
     
         19 . A touch controller comprising:
 a driving unit configured to apply a first driving voltage to a plurality of sensing electrodes connected to a plurality of sensing units in a first mode, and configured to apply a second driving voltage to the plurality of the sensing electrodes in a second mode that is different from the first mode; and   an amplifying unit configured to receive first sensing values and second sensing values from the plurality of the sensing units,   wherein the driving unit is configured to apply the first and second driving voltages to the negative input.   
     
     
         20 . The touch controller of  claim 19 , wherein the driving unit is further configured to detect the first sensing values using a self-capacitance method in the first mode, and configured to detect the second sensing values using a mutual capacitance method in the second mode.