Touch-sensitive device and method for driving the same
A touch-sensitive device comprises: a touch-sensing carrier panel; a driving signal line and a inductive signal line; a touch-sensitive circuit connected with the driving signal line and the inductive signal line; an array of first electrodes and an array of second electrodes located on the touch-sensing carrier panel; a first switch having an end connected to the array of the first electrodes and the other end connected to the corresponding driving signal line and the corresponding inductive signal line; and a second switch having an end connected to the array of the second electrodes and the other end connected to the corresponding driving signal line and the corresponding inductive signal line, wherein each of the first switch and the second switch is adapted to switch between a respective driving signal line and a respective inductive signal line such that the array of first electrodes is connected with one of the driving signal line and the inductive signal line and the array of second electrodes is connected with the other one of the driving signal line and the inductive signal line. The present disclosure also provides a method for driving the above touch-sensitive device. The present invention may perform the signal conversion by switches such that the first electrodes and the second electrodes are switched between the connections to the inductive signal lines and the connections to the driving signal lines by performing signal switching by switches, so as to achieve the double side touch sensing.
1. A touch-sensitive device comprising:
a touch-sensing carrier panel comprising a first substrate and a second substrate opposed to the first substrate;
a driving signal line and an inductive signal line;
a touch-sensitive circuit connected with the driving signal line and the inductive signal line;
an array of first electrodes and an array of second electrodes located on the touch-sensing carrier panel;
a first switch having a first end connected to the array of the first electrodes and a second end connected to the driving signal line and the inductive signal line;
a second switch having a first end connected to the array of the second electrodes and a second end connected to the driving signal line and the inductive signal line;
wherein each of the first switch and the second switch is adapted to switch between the driving signal line and the inductive signal line such that the array of first electrodes is connected with one of the driving signal line and the inductive signal line and the array of second electrodes is connected with the other one of the driving signal line and the inductive signal line, and
wherein at least one array of the array of the first electrodes and the array of the second electrodes is located between the first substrate and the second substrate.
2. The touch-sensitive device according to claim 1 , comprising a plurality of the first switch and a plurality of the second switch, wherein
each row of the array of the first electrodes are connected to one first switch and each column of the array of the second electrodes are connected to one second switch; or
each column of the array of the first electrodes are connected to one first switch and each row of the array of the second electrodes are connected to one second switch.
3. The touch-sensitive device according to claim 1 , wherein
a region surrounded by two adjacent rows of the array of the first electrodes and two adjacent columns of the array of the second electrodes corresponds to N pixel units of the display panel; or
a region surrounded by two adjacent columns of the array of the first electrodes and two adjacent rows of the array of the second electrodes corresponds to N pixel units of the display panel, and
wherein N is a natural number.
4. The touch-sensitive device according to claim 3 , wherein N is in a range of 3˜15.
5. A method for driving the touch-sensitive device of claim 1 ,
the method comprising the steps of:
defining a predetermined time period t as one touch sensing period in which the array of the first electrodes is applied with a driving signal and an inductive signal from the array of the second electrodes is detected for a predetermined time period t 1 and then the array of the second electrodes is applied with the driving signal and the inductive signal from the array of the first electrodes is detected for a predetermined time period t 2 , and
cycling the touch sensing period to realize a double-side touch sensing, wherein t 1 +t 2 =t.
6. The method according to claim 5 , wherein t 1 =t 2 .
7. The method according to claim 5 , wherein when the touch-sensing carrier panel is a display panel and a time period for displaying a frame of a picture is T, a preceding part of the time period T is a display time slice T 1 and a following part of the time period T is a touch sensing time slice T 2 , and wherein T 1 +T 2 =T, T 1 >T 2 , T 2 =s×t, and s is a number that is greater than or equal to 1.
8. A method for driving the touch-sensitive device according to claim 1 , the method comprising the steps of:
manipulating the first switch to connect the array of the first electrodes to the driving signal line and manipulating the second switch to connect the array of the second electrodes to the inductive signal line; and
after a predetermined period, manipulating the first switch to connect the array of the first electrodes to the inductive signal line and manipulating the second switch to connect the array of the second electrodes to the driving signal line.
9. The touch-sensitive device according to claim 1 , wherein the touch-sensing carrier panel is a display panel.
10. The touch-sensitive device according to claim 9 , wherein the display panel comprises:
the first substrate and the second substrate opposed to the first substrate; and
liquid crystal between the first substrate and the second substrate,
wherein the array of the first electrodes and the array of the second electrodes are located in stacks on sides of the first substrate and the second substrate facing the liquid crystal respectively.
11. The touch-sensitive device according to claim 9 , wherein the display panel comprises:
the first substrate and the second substrate opposed to the first substrate; and
liquid crystal between the first substrate and the second substrate,
wherein the array of the first electrodes is located in a stack on a side of the first substrate facing the liquid crystal and the array of the second electrodes is located on a side of the second substrate away from the first substrate.
12. The touch-sensitive device according to claim 9 , wherein the display panel comprises:
the first substrate and the second substrate opposed to the first substrate; and
liquid crystal between the first substrate and the second substrate,
wherein the array of the first electrodes is located on a side of the first substrate away from the second substrate and the array of the second electrodes is located in a stack on a side of the second substrate facing the liquid crystal.