Touch screen, touch detection method, and wearable device

Abstract

A touch screen includes: a touch FPC, a cover with a touch area, and a main board with a display screen; in which a surface of the touch FPC is attached to a rear surface of the touch area, another surface of the touch FPC is placed on the display screen, and an area of the touch FPC covering the display screen is smaller than a display area of the display screen; the touch screen is configured to sense a touch operation of the touch area by the touch FPC, and to determine a touch position and/or a touch track of the touch operation.

1 . A touch screen, comprising: a touch flexible printed circuit (FPC), a cover with a touch area, and a main board with a display screen; wherein a surface of the touch FPC is attached to a rear surface of the touch area, another surface of the touch FPC is placed on the display screen, and an area of the touch FPC covering the display screen is smaller than a display area of the display screen; and
 the touch screen is configured to sense a touch operation of the touch area by the touch FPC, and to determine a touch position and/or a touch track of the touch operation.   
     
     
         2 . The touch screen of  claim 1 , wherein the touch FPC has a strip structure disposed around the display screen. 
     
     
         3 . The touch screen of  claim 1 , wherein the touch FPC comprises a capacitance sensing circuit and a capacitance detecting circuit connected to the capacitance sensing circuit; in which the capacitance sensing circuit is configured to sense the touch operation of the touch area; and the capacitance detecting circuit is configured to determine the touch position and/or the touch track of the touch operation. 
     
     
         4 . The touch screen of  claim 1 , wherein the touch FPC comprises a capacitance sensing circuit, and the main board comprises a capacitance detecting circuit connected to the capacitance sensing circuit; in which the capacitance sensing circuit is configured to sense the touch operation of the touch area; and the capacitance detecting circuit is configured to determine the touch position and/or the touch track of the touch operation. 
     
     
         5 . The touch screen of  claim 3 , wherein the capacitance sensing circuit comprises a transmitting electrode and a receiving electrode;
 the capacitance sensing circuit is configured to, when determining that the touch operation is sensed by a capacitance change between the transmitting electrode and the receiving electrode, transmit capacitance change information to the capacitance detecting circuit; and   the capacitance detecting circuit is configured to determine the touch position and/or the touch track of the touch operation based on the capacitance change information.   
     
     
         6 . The touch screen of  claim 1 , wherein the main board comprises a micro control unit MCU; and the MCU is configured to determine an execution instruction corresponding to the touch position and/or the touch track, and to execute the execution instruction; and the display screen is configured to display an execution result corresponding to the execution instruction. 
     
     
         7 . A touch detection method, wherein the method is applicable to a touch screen, the touch screen comprises: a touch flexible printed circuit (FPC), a cover with a touch area, and a main board with a display screen; wherein a surface of the touch FPC is attached to a rear surface of the touch area, another surface of the touch FPC is placed on the display screen, and an area of the touch FPC covering the display screen is smaller than a display area of the display screen; and the method comprises:
 receiving a touch operation by the touch area; and   sensing the touch operation by the touch FPC, and determining a touch position and/or a touch track of the touch operation.   
     
     
         8 . The method of  claim 7 , wherein the touch FPC comprises a capacitance sensing circuit and a capacitance detecting circuit connected to the capacitance sensing circuit;
 sensing the touch operation by the touch FPC, and determining the touch position and/or the touch track of the touch operation, comprises:   sensing the touch operation of the touch area by the capacitance sensing circuit; and   determining the touch position and/or the touch track of the touch operation by the capacitance detecting circuit on the touch FPC.   
     
     
         9 . The method of  claim 7 , wherein the touch FPC comprises a capacitance sensing circuit, and the main board comprises a capacitance detecting circuit connected to the capacitance sensing circuit;
 sensing the touch operation by the touch FPC, and determining the touch position and/or the touch track of the touch operation, comprises:   sensing the touch operation of the touch area by the capacitance sensing circuit; and   determining the touch position and/or the touch track of the touch operation by the capacitance detecting circuit on the main board.   
     
     
         10 . The method of  claim 8 , wherein the capacitance sensing circuit comprises a transmitting electrode and a receiving electrode;
 sensing the touch operation of the touch area by the capacitance sensing circuit comprises:   when determining that the touch operation is sensed by a capacitance change between the transmitting electrode and the receiving electrode, transmitting capacitance change information to the capacitance detecting circuit.   
     
     
         11 . The method of  claim 7 , wherein the main board comprises a micro control unit MCU;
 the method further comprises:   determining, by the MCU, an execution instruction corresponding to the touch position and/or the touch track, and executing, by the MCU, the execution instruction;   displaying, by the display screen, an execution result corresponding to the execution instruction.   
     
     
         12 - 13 . (canceled) 
     
     
         14 . A wearable device, comprising:
 a touch screen   comprising: a touch flexible printed circuit (FPC), a cover with a touch area, and a main board with a display screen; wherein a surface of the touch FPC is attached to a rear surface of the touch area, another surface of the touch FPC is placed on the display screen, and an area of the touch FPC covering the display screen is smaller than a display area of the display screen; and   computer readable instructions that when executed by a processor implement receiving a touch operation by the touch area; and sensing the touch operation by the touch FPC, and determining a touch position and/or a touch track of the touch operation.   
     
     
         15 . The touch screen of  claim 4 , wherein the capacitance sensing circuit comprises a transmitting electrode and a receiving electrode;
 the capacitance sensing circuit is configured to, when determining that the touch operation is sensed by a capacitance change between the transmitting electrode and the receiving electrode, transmit capacitance change information to the capacitance detecting circuit; and   the capacitance detecting circuit is configured to determine the touch position and/or the touch track of the touch operation based on the capacitance change information.   
     
     
         16 . The method of  claim 9 , wherein the capacitance sensing circuit comprises a transmitting electrode and a receiving electrode;
 sensing the touch operation of the touch area by the capacitance sensing circuit comprises:   when determining that the touch operation is sensed by a capacitance change between the transmitting electrode and the receiving electrode, transmitting capacitance change information to the capacitance detecting circuit.   
     
     
         17 . The wearable device of  claim 14 , wherein the touch FPC has a strip structure disposed around the display screen. 
     
     
         18 . The wearable device of  claim 14 , wherein the touch FPC comprises a capacitance sensing circuit and a capacitance detecting circuit connected to the capacitance sensing circuit;
 sensing the touch operation by the touch FPC, and determining the touch position and/or the touch track of the touch operation, comprises:   sensing the touch operation of the touch area by the capacitance sensing circuit; and   determining the touch position and/or the touch track of the touch operation by the capacitance detecting circuit on the touch FPC.   
     
     
         19 . The wearable device of  claim 14 , wherein the touch FPC comprises a capacitance sensing circuit, and the main board comprises a capacitance detecting circuit connected to the capacitance sensing circuit;
 sensing the touch operation by the touch FPC, and determining the touch position and/or the touch track of the touch operation, comprises:   sensing the touch operation of the touch area by the capacitance sensing circuit; and   determining the touch position and/or the touch track of the touch operation by the capacitance detecting circuit on the main board.   
     
     
         20 . The wearable device of  claim 18 , wherein the capacitance sensing circuit comprises a transmitting electrode and a receiving electrode;
 sensing the touch operation of the touch area by the capacitance sensing circuit comprises:   when determining that the touch operation is sensed by a capacitance change between the transmitting electrode and the receiving electrode, transmitting capacitance change information to the capacitance detecting circuit.   
     
     
         21 . The wearable device of  claim 19 , wherein the capacitance sensing circuit comprises a transmitting electrode and a receiving electrode;
 sensing the touch operation of the touch area by the capacitance sensing circuit comprises:   when determining that the touch operation is sensed by a capacitance change between the transmitting electrode and the receiving electrode, transmitting capacitance change information to the capacitance detecting circuit.   
     
     
         22 . The wearable device of  claim 14 , wherein the processor comprises a micro control unit MCU;
 and the computer readable instructions when executed by the processor further implement:   determining, by the MCU, an execution instruction corresponding to the touch position and/or the touch track, and executing, by the MCU, the execution instruction;   displaying, by the display screen, an execution result corresponding to the execution instruction.