CN107045412B - Capacitive touch structure, touch display panel, display device and scanning method - Google Patents
Capacitive touch structure, touch display panel, display device and scanning method Download PDFInfo
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- CN107045412B CN107045412B CN201710307578.5A CN201710307578A CN107045412B CN 107045412 B CN107045412 B CN 107045412B CN 201710307578 A CN201710307578 A CN 201710307578A CN 107045412 B CN107045412 B CN 107045412B
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- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0412—Digitisers structurally integrated in a display
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Abstract
The invention provides a capacitive touch structure and a scanning method, the capacitive touch structure can achieve the purpose of simultaneously detecting touch positions by two adjacent rows of touch detection electrodes and/or simultaneously detecting touch positions by two adjacent rows of touch detection electrodes by controlling the on and off of a switch unit, namely, the bound and overlapped type row scanning or the bound and overlapped type row scanning is realized, two touch detection electrodes in the row direction or the column direction are connected together through the switch unit to form a touch detection electrode unit, the influence of a row gap and a column gap between the adjacent touch detection electrodes on the touch precision is reduced, the touch precision of a touch pen is improved, the linearity of the touch pen is improved, and the like.
Description
Technical Field
The present invention relates to the field of touch technologies, and in particular, to a capacitive touch structure, a touch display panel, a display device and a scanning method
Background
With the rapid development of display technology, touch display devices have gradually spread throughout the lives of people. In the initial development stage of touch display, the touch display panel is formed by attaching the touch panel to the display panel to realize touch display, and the touch panel and the display panel need to be prepared separately, so that the cost is high, the thickness is larger, and the production efficiency is low. Along with the development of touch display technology, embedded touch display panel has appeared, and embedded touch display panel is embedded inside display panel with touch-control detection electrode, can attenuate the holistic thickness of module, again can greatly reduced touch display device's cost of manufacture, makes it receive each big panel producer favour.
Taking the self-capacitance touch display panel as an example, a plurality of self-capacitance electrodes which are arranged in the same layer and are insulated from each other are arranged in the self-capacitance touch display panel, and when a human body does not touch a screen, the capacitance born by each capacitance electrode is a fixed value; when a human body touches the screen, the capacitance borne by the corresponding self-capacitance electrode is a fixed value and is superposed with the human body capacitance, and the touch position can be judged by the touch integrated circuit in the driving unit by detecting the capacitance value change of the respective capacitance electrode in the touch time period.
Fig. 1 is a schematic diagram of a self-contained touch panel in the prior art, and as shown in fig. 1, for example, a common electrode of an array substrate in a display panel can be used as a touch detection electrode 10' for self-contained touch detection, and touch control and display control are performed in time sequence by time-sharing driving, so as to simultaneously implement touch control and display functions. The stylus 20' used with the capacitive touch screen is more suitable for the use habit of people using the input tool, i.e. the pen, compared with the finger writing. However, in the self-contained structure, the radius of the pen tip of the stylus pen 20 'is generally small, the contact area with the touch display panel is small, and when the pen tip of the stylus pen 20' is located in the gap between two adjacent touch detection electrodes 10', the amount of induction at this time is smaller than that at the center position of the touch detection electrodes 10', and it is difficult to detect a touch point, and a missed touch point is likely to occur in the touch at this position, so that defects such as disconnection, poor linearity, and the like are likely to occur when the stylus pen is used for scribing.
Disclosure of Invention
The invention aims to provide a capacitive touch structure, a touch display panel, a display device and a scanning method, and aims to solve the problems of poor touch precision, poor linearity and the like caused by small contact area between a pen point of a touch pen and the touch display panel in the conventional touch display panel and display device.
The invention provides a capacitance type touch control structure, comprising: a plurality of touch detection electrodes; the touch signal lines are connected with the touch detection electrodes in a one-to-one correspondence manner; the touch detection chip is connected with the touch signal line and used for judging a touch position by detecting capacitance value change of each touch detection electrode in a touch scanning time; the capacitive touch structure further comprises a first switch unit, wherein the first switch unit comprises a first end, a second end and a control end; two touch signal lines connected to two adjacent touch detection electrodes in the row direction are respectively connected to the first end and the second end of the first switch unit.
In an embodiment of the invention, the capacitive touch structure further includes a second switch unit, where the second switch unit includes a first end, a second end, and a control end; two touch signal lines connected to two adjacent touch detection electrodes in the column direction are respectively connected to the first end and the second end of the second switch unit.
In an embodiment of the invention, control ends of the first switch unit and the second switch unit are connected to a control signal output end of the touch detection chip.
Further, the present invention also provides a scanning method for a capacitive touch structure, where the capacitive touch structure includes M rows and N columns of touch detection electrodes, specifically:
in the touch detection stage, the touch detection chip applies a driving signal to each touch detection electrode in a time-sharing manner through a touch signal line connected with each touch detection electrode; receiving feedback signals of the touch detection electrodes, and judging touch positions according to the feedback signals;
the step of applying a driving signal to each touch detection electrode in a time-sharing manner, receiving a feedback signal of each touch detection electrode, and determining a touch position according to the feedback signal includes:
in a time period t1, simultaneously applying driving signals to the touch detection electrodes of the nth row and the (n + 1) th row, receiving feedback signals of the touch detection electrodes of the nth row and the (n + 1) th row, and judging touch positions according to the feedback signals; then, in a t2 time period adjacent to t1, simultaneously applying driving signals to the (n + 1) th and (n + 2) th touch detection electrodes, receiving feedback signals of the (n + 1) th and (n + 2) th touch detection electrodes, and judging touch positions according to the feedback signals; repeating the steps until all the touch detection electrodes are scanned; wherein M is a positive integer not less than 3; n is a positive integer not less than 3, and N is a positive integer not greater than N-2.
In an embodiment of the invention, the "applying a driving signal to each touch detection electrode in a time-sharing manner, and receiving a feedback signal of each touch detection electrode and determining a touch position according to the feedback signal" further includes:
in a time period t1', simultaneously applying driving signals to the touch detection electrodes in the mth row and the (m + 1) th row, receiving feedback signals of the touch detection electrodes in the mth row and the (m + 1) th row, and judging touch positions according to the feedback signals; then, in a time period t2 'adjacent to t1', simultaneously applying driving signals to touch detection electrodes in a row m +1 and a row m +2, receiving feedback signals of the touch detection electrodes in the row m +1 and the row m +2, judging touch positions according to the feedback signals, and so on until all the touch detection electrodes are scanned again; wherein M is a positive integer not greater than M-2.
Furthermore, the present invention also provides a touch display panel, which includes an array substrate, where the array substrate includes the above capacitive touch structure.
Furthermore, the invention also provides a display device comprising the touch display panel.
Compared with the prior art, the technical scheme provided by the invention has the following advantages: the invention provides a capacitive touch structure, which comprises a first switch unit and a second switch unit, wherein the first switch unit and the second switch unit respectively comprise a first end, a second end and a control end; two touch signal lines connected to two adjacent touch detection electrodes in the column direction are respectively connected to a first end and a second end of the second switch unit; the purpose of simultaneously detecting the touch positions of two adjacent rows of touch detection electrodes and/or simultaneously detecting the touch positions of two adjacent rows of touch detection electrodes can be achieved by controlling the on and off of the first switch unit and the second switch unit, namely, the binding and overlapping type row scanning or the binding and overlapping type row scanning is achieved, the two touch detection electrodes in the row direction or the row direction are connected together through the switch unit to form a touch detection electrode unit, the influence of a row gap and a column gap between the adjacent touch detection electrodes on the touch precision is reduced, the touch precision of a touch pen is improved, the linearity of the touch pen is improved, and the like.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments made with reference to the following drawings:
FIG. 1 is a diagram of a touch display panel in the prior art;
fig. 2 is a schematic diagram of a capacitive touch structure according to the present invention;
FIG. 3 is a schematic diagram illustrating a connection manner of a first switch unit in the capacitive touch structure shown in FIG. 2;
FIG. 4 is a schematic diagram illustrating another connection manner of a first switch unit in the capacitive touch structure shown in FIG. 2;
FIG. 5 is a schematic diagram illustrating a connection manner of a second switch unit in the capacitive touch structure shown in FIG. 2;
FIG. 6 is a schematic diagram illustrating another connection manner of a second switch unit in the capacitive touch structure shown in FIG. 2;
FIG. 7 is a schematic diagram of a bundled interleaved column scan scheme provided by the present invention;
FIG. 8 is a schematic diagram of a bundled interlaced line scan scheme according to the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
First, an embodiment of the present invention provides a capacitive touch structure, and fig. 2 is a schematic view of the capacitive touch structure provided by the present invention, as shown in fig. 2, the capacitive touch structure includes a plurality of touch detection electrodes 10, in this embodiment, the touch detection electrodes 10 are arranged in a matrix, and the touch detection electrodes 10 are disposed on the same layer and insulated from each other; the touch control device comprises a plurality of touch control signal lines 20 which are not crossed with each other and a touch control detection chip IC, wherein one end of each touch control signal line 20 is connected to a corresponding touch control detection electrode 10 through a connecting hole, the other end of each touch control signal line 20 is connected to the touch control detection chip IC, in the touch control detection stage, the touch control detection chip IC applies a driving signal to each touch control detection electrode 10 through the touch control signal line 20, detects the capacitance value change of each touch control detection electrode 10 and judges a touch control position according to a received feedback signal.
Further, the capacitive touch structure further includes a switch module 30, and the switch module 30 includes a plurality of switch units (not shown in the figure). Specifically, each switch unit includes a first end, a second end and a control end, and two touch signal lines 20 connected to two adjacent touch detection electrodes 10 in the row direction are respectively connected to the first end and the second end of one switch unit; and/or two touch signal lines 20 connected with two adjacent touch detection electrodes 10 in the column direction are respectively connected to a first end and a second end of another switch unit, the switch unit is controlled to be in an on state or an off state by a control end of the switch unit, and when a certain switch unit is in the on state, the two touch detection electrodes in the row direction and/or the column direction connected with the switch unit are connected together to form a touch detection electrode unit.
Fig. 3 is a schematic diagram illustrating a connection manner of the first switch unit in the capacitive touch structure shown in fig. 2, as shown in fig. 2-3, the switch unit includes a first switch unit 31, the first switch unit 31 includes a first end, a second end and a control end, two touch signal lines 20 connected to two adjacent touch detection electrodes 10 in the row direction are respectively connected to the first end and the second end of one first switch unit 31, and the control end of the first switch unit 31 is connected to the control signal output end SW.
Specifically, the plurality of touch detection electrodes 20 in the capacitive touch structure are arranged in a matrix, for example, the capacitive touch structure includes N rows of touch detection electrodes 20. Taking the first touch detection electrode 11 and the second touch detection electrode 12 located in the same row as an example, the first touch detection electrode 11 and the second touch detection electrode 12 are located in the nth row and the (n + 1) th row, respectively, that is, the first touch detection electrode 11 and the second touch detection electrode 12 are two touch detection electrodes adjacent to each other in the row direction; one end of the first touch signal line 21 is connected to the first touch detection electrode 11, and the other end is connected to the touch detection chip IC, and one end of the second touch signal line 22 is connected to the second touch detection electrode 12, and the other end is connected to the touch detection chip IC. The first touch signal line 21 and the second touch signal line 22 are respectively connected to a first end and a second end of the same first switch unit 31, the first switch unit 31 has an on state and an off state under the control of a control signal provided by a control signal output end, and when the first switch unit 31 is in the on state, the first touch detection electrode 11 and the second touch detection electrode 12 are connected together to form a touch detection electrode unit; when the first switch unit 31 is in the off state, the first touch detection electrode 11 is insulated from the second touch detection electrode 12.
Further, the capacitive touch structure further includes a third touch detection electrode 13 located in the same row as the second touch detection electrode 12, where the second touch detection electrode 12 and the third touch detection electrode 13 are respectively located in an n +1 th row and an n +2 th row, that is, the second touch detection electrode 12 and the third touch detection electrode 13 are two adjacent touch detection electrodes in the row direction; one end of the second touch signal line 22 is connected to the second touch detection electrode 12, and the other end is connected to the touch detection chip IC; one end of the third touch signal line 23 is connected to the third touch detection electrode 13, and the other end is connected to the touch detection chip IC. The second touch signal line 22 and the third touch signal line 23 are respectively connected to a first end and a second end of another first switch unit 31, and when the first switch unit 31 is in an on state, the second touch detection electrode 12 and the third touch detection electrode 13 are connected together to form a touch detection electrode unit; when the first switch unit 31 is in an off state, the second touch detection electrode 12 is insulated from the third touch detection electrode 13.
That is, two adjacent touch detection electrodes in the row direction can be connected together through the switch unit to form a touch detection electrode unit, so that the influence of a column gap between the adjacent touch detection electrodes on touch precision is reduced, the touch precision of the stylus is improved, and the linearity of the stylus is improved.
Further, in the present embodiment, it may be configured that:
the plurality of touch signal lines 20 connected to all the touch detection electrodes 10 on the nth row in a one-to-one correspondence manner form an nth group of touch signal lines, the plurality of touch signal lines 20 connected to all the touch detection electrodes 10 on the (n + 1) th row in a one-to-one correspondence manner form an (n + 1) th group of touch signal lines, and the control ends of all the first switch units 31 connected to the corresponding touch signal lines 20 in the nth group and the (n + 1) th group of touch signal lines are connected to the same control signal output end SW 1; the plurality of touch signal lines 20 connected to all the touch detection electrodes 10 on the (n + 1) th row in a one-to-one correspondence manner form an (n + 1) th group of touch signal lines, the plurality of touch signal lines 20 connected to all the touch detection electrodes 10 on the (n + 2) th row in a one-to-one correspondence manner form an (n + 2) th group of touch signal lines, and the control ends of all the first switch units 31 connected to the corresponding touch signal lines 20 of the (n + 1) th group and the (n + 2) th group of touch signal lines are connected to the same control signal output end SW 2; the plurality of touch signal lines 20 connected to all the touch detection electrodes 10 on the (n + 2) th row in a one-to-one correspondence manner form an (n + 2) th group of touch signal lines, the plurality of touch signal lines 20 connected to all the touch detection electrodes 10 on the (n + 3) th row in a one-to-one correspondence manner form an (n + 3) th group of touch signal lines, and the control ends of all the first switch units 31 connected to the corresponding touch signal lines 20 of the (n + 2) th group and the (n + 3) th group of touch signal lines are connected to the same control signal output end SW 3; and so on.
Wherein N is a positive integer not less than 3, and N is a positive integer not more than N-2.
Of course, it can also be provided that: the control terminal of each first switching unit 31 is independently connected to the control signal output terminal, and the present invention is not particularly limited thereto.
Further, as shown in fig. 4, fig. 4 is a schematic diagram illustrating another connection manner of the first switch unit in the capacitive touch structure shown in fig. 2, the capacitive touch structure shown in fig. 4 is similar to the capacitive touch structure shown in fig. 3, the capacitive touch structure includes a plurality of first switch units 31, each of the first switch units 31 includes a first end, a second end and a control end, and the two touch signal lines 20 connected to the two touch detection electrodes 10 adjacent to each other in the row direction are respectively connected to the first end and the second end of each of the first switch units 31. The control end of the first switch unit 31 is directly connected to the touch signal output end in the touch detection chip IC, and the touch detection chip IC provides a control signal for the control end, so that each first switch unit 31 is in an on or off state as required.
In another embodiment of the present invention, as shown in fig. 2 and 5, fig. 5 is a schematic diagram illustrating a connection manner of a second switch unit in the capacitive touch structure shown in fig. 2, the switch unit includes a second switch unit 32, the second switch unit 32 includes a first end, a second end and a control end, two touch signal lines 20 connected to two adjacent touch detection electrodes 10 in the column direction are respectively connected to the first end and the second end of the second switch unit 32, and the control end of the second switch unit 32 is connected to the control signal SW'.
Specifically, the plurality of touch detection electrodes 20 in the capacitive touch structure are arranged in a matrix, for example, the capacitive touch structure includes M rows of touch detection electrodes 20. Taking the fourth touch detection electrode 14 and the fifth touch detection electrode 15 in the same column as an example, the fourth touch detection electrode 14 and the fifth touch detection electrode 15 are respectively located on the m-th row and the m + 1-th row, that is, the fourth touch detection electrode 14 and the fifth touch detection electrode 15 are two adjacent touch detection electrodes in the column direction; one end of the fourth touch signal line 24 is connected to the fourth touch detection electrode 14, the other end is connected to the touch detection chip IC, and one end of the fifth touch signal line 25 is connected to the fifth touch detection electrode 15, and the other end is connected to the touch detection chip IC. The fourth touch signal line 24 and the fifth touch signal line 25 are respectively connected to a first end and a second end of the same second switch unit 32, the second switch unit 32 has an on state and an off state under the control of the control signal, and when the second switch unit 32 is in the on state, the fourth touch detection electrode 14 and the fifth touch detection electrode 15 are connected together to form a touch detection electrode unit; when the second switch unit 32 is in an off state, the fourth touch detection electrode 14 is insulated from the fifth touch detection electrode 15.
Further, the capacitive touch structure further includes a sixth touch detection electrode 16 located in the same row as the fifth touch detection electrode 15, where the fifth touch detection electrode 15 and the sixth touch detection electrode 16 are located in the m +1 th row and the m +2 th row, respectively, that is, the fifth touch detection electrode 15 and the sixth touch detection electrode 16 are two adjacent touch detection electrodes in the row direction; one end of the fifth touch signal line 25 is connected to the fifth touch detection electrode 15, and the other end is connected to the touch detection chip IC; one end of the sixth touch signal line 23 is connected to the sixth touch detection electrode 16, and the other end is connected to the touch detection chip IC. The fifth touch signal line 25 and the sixth touch signal line 26 are respectively connected to the first end and the second end of another second switch unit 32, and when the second switch unit 32 is in an on state, the fifth touch detection electrode 15 and the sixth touch detection electrode 16 are connected together to form a touch detection electrode unit; when the second switch unit 32 is in an off state, the fifth touch detection electrode 15 is insulated from the sixth touch detection electrode 16.
That is, two adjacent touch detection electrodes in the column direction can be connected together through the switch unit to form a touch detection electrode unit, so that the influence of a line gap between the adjacent touch detection electrodes on touch precision is reduced, the touch precision of the stylus is improved, and the linearity of the stylus is improved.
Further, in the present embodiment, it may be configured that:
the multiple touch signal lines 20 connected with all the touch detection electrodes 10 in the mth row in a one-to-one correspondence manner form an mth group of touch signal lines, the multiple touch signal lines 20 connected with all the touch detection electrodes 10 in the mth +1 row in a one-to-one correspondence manner form an m +1 group of touch signal lines, and the control ends of all the second switch units 32 connected with the corresponding touch signal lines 20 in the mth group and the m +1 group of touch signal lines are connected to the same control signal output end SW 1'; the plurality of touch signal lines 20 connected to all the touch detection electrodes 10 in the m +1 th row in a one-to-one correspondence manner form an m +1 th group of touch signal lines, the plurality of touch signal lines 20 connected to all the touch detection electrodes 10 in the m +2 th row in a one-to-one correspondence manner form an m +2 th group of touch signal lines, and the control ends of all the second switch units 32 connected to the corresponding touch signal lines 20 in the m +1 th group and the m +2 th group of touch signal lines are connected to the same control signal output end SW2', and so on.
Wherein M is a positive integer not less than 3, and M is a positive integer not more than M-2.
Of course, it can also be provided that: the control terminal of each second switch unit 32 is independently connected to the control signal output terminal, and the present invention is not particularly limited thereto.
Further, as shown in fig. 6, fig. 6 is a schematic diagram of another connection manner of second switch units in the capacitive touch structure shown in fig. 2, the capacitive touch structure shown in fig. 6 is similar to the capacitive touch structure shown in fig. 5, the capacitive touch structure includes a plurality of second switch units 32, each of the second switch units 32 includes a first end, a second end and a control end, and two touch signal lines 20 connected to two adjacent touch detection electrodes 10 in the column direction are respectively connected to the first end and the second end of the second switch unit 32. The control end of the second switch unit 32 is directly connected to the control signal output end in the touch detection chip IC, and the touch detection chip IC provides a control signal for the control signal output end, so that each second switch unit 32 is in an on or off state as required.
Further, in another embodiment of the present invention, the capacitive touch structure provided by the present invention may also include the first switch unit and the second switch unit. The first switch unit and the second switch unit respectively comprise a first end, a second end and a control end, two touch signal lines connected with two adjacent touch detection electrodes in the row direction are respectively connected with the first end and the second end of the first switch unit, two touch signal lines connected with two adjacent touch detection electrodes in the column direction are respectively connected with the first end and the second end of the second switch unit, and the two adjacent touch detection electrodes in the column direction and the row direction can be connected together through the switch units in a time-sharing mode to form a whole touch detection electrode.
Further, the present invention also provides a scanning method of the capacitive touch structure, specifically, the capacitive touch structure includes a plurality of touch detection electrodes, and the plurality of touch detection electrodes are arranged in a matrix; the touch control device comprises a plurality of touch control signal lines and touch control detection chips, wherein one end of each touch control signal line is connected to a corresponding touch control detection electrode through a connecting hole, and the other end of each touch control signal line is connected to the touch control detection chip; further, the capacitive touch structure further comprises a plurality of switch units, specifically, each switch unit comprises a first end, a second end and a control end, and two touch signal lines connected with two adjacent touch detection electrodes in the row direction are respectively connected to the first end and the second end of the switch unit; and/or two touch signal lines connected with two adjacent touch detection electrodes in the column direction are respectively connected to the first end and the second end of the other switch unit.
For example, the capacitive touch structure may include M rows and N columns of touch detection electrodes, where a plurality of touch signal lines connected to all the touch detection electrodes on the nth column in a one-to-one correspondence form an nth group of touch signal lines, a plurality of touch signal lines connected to all the touch detection electrodes on the N +1 th column in a one-to-one correspondence form an N +1 th group of touch signal lines, and a plurality of touch signal lines connected to all the touch detection electrodes on the N +2 th column in a one-to-one correspondence form an N +2 th group of touch signal lines; the plurality of touch signal lines connected with all the touch detection electrodes in the mth row in a one-to-one correspondence form an mth group of touch signal lines, the plurality of touch signal lines connected with all the touch detection electrodes in the m +1 row in a one-to-one correspondence form an m +1 group of touch signal lines, and the plurality of touch signal lines connected with all the touch detection electrodes in the m +2 row in a one-to-one correspondence form an m +2 group of touch signal lines.
In the touch detection stage, the touch detection chip applies a driving signal to each touch detection electrode in a time-sharing manner through a touch signal line connected with each touch detection electrode; and receiving feedback signals of the touch detection electrodes, and judging the touch position according to the feedback signals.
Specifically, fig. 7 is a schematic diagram of a bundled interlaced column scanning method provided by the present invention, and as shown in fig. 7, in a touch detection stage, the bundled interlaced column scanning method includes:
in a time period t1, all the first switch units connected to the corresponding touch signal lines in the nth and (n + 1) th touch signal lines are turned on and the other switch units are turned off by the control signal. The touch detection chip applies driving signals to the nth row and the (n + 1) th row of touch detection electrodes through touch signal lines connected with the touch detection electrodes, receives feedback signals of the nth row and the (n + 1) th row of touch detection electrodes through the touch signal lines connected with the touch detection electrodes, and judges touch positions according to the feedback signals;
next, in a t2 period adjacent to t1, all of the first switch cells connected to the corresponding touch signal lines of the (n + 1) th and (n + 2) th groups of touch signal lines at the same time are made to be in an on state and the other switch cells are made to be in an off state by the control signal. The touch detection chip simultaneously applies driving signals to the (n + 1) th row and the (n + 2) th row of touch detection electrodes through touch signal lines connected with the touch detection electrodes, receives feedback signals of the (n + 1) th row and the (n + 2) th row of touch detection electrodes through the touch signal lines connected with the touch detection electrodes, and judges touch positions according to the feedback signals;
and by analogy, until all touch detection electrodes are scanned by adopting the bundled and overlapped column scanning mode, in the scanning process adopting the bundled and overlapped column scanning mode, two adjacent touch detection electrodes on the same row are connected into a touch detection electrode unit in a time-sharing manner, scanning is carried out simultaneously, and except for the first column and the last column of touch detection electrodes, all columns of touch detection electrodes are scanned successively twice respectively, so that the influence of the column gap between the adjacent touch detection electrodes on the touch precision is reduced, the touch precision of a touch pen is further improved, the linearity of the touch pen is improved, and the like.
Wherein M is a positive integer not less than 3, and M is a positive integer not more than M-2; n is a positive integer not less than 3, and N is a positive integer not greater than N-2.
Further, the present invention also provides a scanning method of the capacitive touch structure, further comprising:
after scanning all the touch detection electrodes for the first time in the bundled and overlapped column scanning manner, scanning all the touch detection electrodes for the second time in the bundled and overlapped line scanning manner, specifically, fig. 8 is a schematic diagram of the bundled and overlapped line scanning manner provided by the present invention, and as shown in fig. 8, in the touch detection stage, the bundled and overlapped line scanning manner includes:
in the time period t1', all the second switch units connected to the corresponding touch signal lines in the m-th and m + 1-th groups of touch signal lines are turned on and the other switch units are turned off by the control signal. The touch detection chip simultaneously applies a driving signal to the m-th row and the m + 1-th row of touch detection electrodes through touch signal lines connected with the touch detection electrodes, receives feedback signals of the m-th row and the m + 1-th row of touch detection electrodes through the touch signal lines connected with the touch detection electrodes, and judges a touch position according to the feedback signals,
next, in a t2 'period adjacent to t1', all second switch cells simultaneously connected to corresponding ones of the m +1 th and m +2 th groups of touch signal lines are made to be in an on state and the other switch cells are made to be in an off state by the control signal. The touch detection chip applies driving signals to the (m + 1) th row and the (m + 2) th row of touch detection electrodes through touch signal lines connected with the touch detection electrodes, receives feedback signals of the (m + 1) th row and the (m + 2) th row of touch detection electrodes through the touch signal lines connected with the touch detection electrodes, and judges touch positions according to the feedback signals. Wherein M is a positive integer not greater than M-2.
And by analogy, in the scanning process adopting the binding and overlapping type line scanning mode, two adjacent touch detection electrodes on the same row are connected into a touch detection electrode unit in a time-sharing manner and are scanned simultaneously, and except for the first row and the last row of touch detection electrodes, all rows of touch detection electrodes are scanned twice in sequence, so that the influence of a line gap between the adjacent touch detection electrodes on touch precision is reduced, the touch precision of a touch pen is improved, the linearity of the touch pen is improved, and the like.
As shown above, the scanning method of the capacitive touch structure provided by the embodiment of the invention can adopt a bundled-interlaced column scanning manner and a bundled-interlaced line scanning manner at the same time. Specifically, in the touch detection stage, the bundled and overlapped column scanning mode and the bundled and overlapped line scanning mode are performed alternately, for example, all the touch detection electrodes may be scanned once by using the bundled and overlapped column scanning mode, and then all the touch detection electrodes may be scanned once by using the bundled and overlapped line scanning mode, and then the scanning process is repeated. By adopting the scanning method of alternately scanning in the binding and overlapping type column scanning mode and the binding and overlapping type row scanning mode, the influence of the row gap and the column gap between the adjacent touch detection electrodes on the touch precision can be reduced, the touch precision of the touch pen is further improved, and the linearity of the touch pen is improved.
In other embodiments, the scanning method of alternately scanning in the bundled interlaced column scanning manner and the bundled interlaced line scanning manner may be performed in the bundled interlaced line scanning manner first, and the present invention is not limited thereto.
In other embodiments, the scanning method of the capacitive touch structure provided by the present invention may also include only the bundled and overlapped line scanning manner or only the bundled and overlapped column scanning manner, which is not limited in this respect.
Further, an embodiment of the present invention further provides a touch display panel, where the touch display panel includes an array substrate, and the array substrate includes the capacitive touch structure provided in the embodiment of the present invention. The touch display panel is, for example, a liquid crystal display panel, and includes an array substrate, a color film substrate, and a liquid crystal layer located between the array substrate and the color film substrate, and the touch detection electrode in the capacitive touch structure constitutes a common electrode layer of the array substrate. In the display stage, the touch detection electrode can be reused as a common electrode, and an electric field between the common electrode and the pixel electrode drives liquid crystal molecules in the liquid crystal layer to rotate, so that image display of the liquid crystal display panel is realized.
Furthermore, the embodiment of the invention also provides a display device, which comprises the touch display panel. The display device can be any product or component with a display function, such as a mobile phone, a tablet personal computer, a television, a display, a notebook computer, a digital photo frame, a navigator and the like.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (7)
1. A capacitive touch structure, comprising:
a plurality of touch detection electrodes;
the touch signal lines are connected with the touch detection electrodes in a one-to-one correspondence manner;
the touch detection chip is connected with the touch signal line and used for judging a touch position by detecting capacitance value change of each touch detection electrode in a touch detection stage;
it is characterized in that the preparation method is characterized in that,
the capacitive touch structure further comprises a first switch unit, wherein the first switch unit comprises a first end, a second end and a control end;
two touch signal lines connected with two adjacent touch detection electrodes in the row direction are respectively connected with a first end and a second end of the first switch unit;
the capacitive touch structure comprises N rows of touch detection electrodes;
the touch signal lines connected with the touch detection electrodes on the nth row in a one-to-one correspondence manner form an nth group of touch signal lines, the touch signal lines connected with the touch detection electrodes on the (n + 1) th row in a one-to-one correspondence manner form an (n + 1) th group of touch signal lines,
the control ends of all the first switch units connected with the corresponding touch signal lines in the nth group and the (n + 1) th group of touch signal lines are connected to the same control signal output end;
wherein N is a positive integer not less than 3, and N is a positive integer not more than N-2;
the capacitive touch structure further comprises a second switch unit, wherein the second switch unit comprises a first end, a second end and a control end;
two touch signal lines connected to two adjacent touch detection electrodes in the column direction are respectively connected to a first end and a second end of the second switch unit;
the capacitive touch structure comprises M rows of touch detection electrodes;
the touch signal lines connected with the touch detection electrodes on the m-th row in a one-to-one correspondence form an m-th group of touch signal lines, the touch signal lines connected with the touch detection electrodes on the m + 1-th row in a one-to-one correspondence form an m + 1-th group of touch signal lines,
the control ends of all second switch units connected with the corresponding touch signal lines in the mth group and the (m + 1) th group of touch signal lines are connected to the same control signal output end;
wherein M is a positive integer not less than 3, and M is a positive integer not more than M-2.
2. The capacitive touch structure of claim 1, wherein control terminals of the first switch unit and the second switch unit are connected to a control signal output terminal of the touch detection chip.
3. A scanning method for the capacitive touch structure according to claim 1, wherein the capacitive touch structure comprises M rows and N columns of touch detection electrodes;
the scanning method comprises the following steps:
in the touch detection stage, the touch detection chip applies a driving signal to each touch detection electrode in a time-sharing manner through a touch signal line connected with each touch detection electrode; receiving feedback signals of all touch detection electrodes, and judging touch positions according to the feedback signals;
the step of applying a driving signal to each touch detection electrode in a time-sharing manner, receiving a feedback signal of each touch detection electrode, and judging a touch position according to the feedback signal includes:
simultaneously applying driving signals to the touch detection electrodes of the nth row and the (n + 1) th row in a time period t1, receiving feedback signals of the touch detection electrodes of the nth row and the (n + 1) th row, judging touch positions according to the feedback signals,
then, in a t2 time period adjacent to t1, simultaneously applying driving signals to the (n + 1) th and (n + 2) th touch detection electrodes, receiving feedback signals of the (n + 1) th and (n + 2) th touch detection electrodes, and judging touch positions according to the feedback signals;
repeating the steps until all the touch detection electrodes are scanned once;
wherein M is a positive integer not less than 3, N is a positive integer not less than 3, and N is a positive integer not more than N-2.
4. The scanning method according to claim 3, wherein the time-sharing applying a driving signal to each touch detection electrode and receiving a feedback signal of each touch detection electrode and determining a touch position according to the feedback signal further comprises:
simultaneously applying driving signals to the m-th row and the m + 1-th row of touch detection electrodes in a time period t1', receiving feedback signals of the m-th row and the m + 1-th row of touch detection electrodes, judging touch positions according to the feedback signals,
then, in a time period t2 'adjacent to t1', simultaneously applying driving signals to the (m + 1) th row and the (m + 2) th row of touch detection electrodes, receiving feedback signals of the (m + 1) th row and the (m + 2) th row of touch detection electrodes, and judging touch positions according to the feedback signals;
repeating the steps until all the touch detection electrodes are scanned again;
wherein M is a positive integer not greater than M-2.
5. A touch display panel comprising an array substrate, the array substrate comprising the capacitive touch structure of claim 1 or 2.
6. The touch display panel of claim 5, wherein all of the touch detection electrodes form a common electrode layer.
7. A display device comprising the touch display panel according to claim 5 or 6.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11789560B2 (en) * | 2021-03-19 | 2023-10-17 | Chongqing Boe Display Technology Co., Ltd. | Touch panel, display panel and display device |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112256157A (en) | 2020-10-09 | 2021-01-22 | 武汉华星光电半导体显示技术有限公司 | Point self-capacitance screen, touch detection method and device and electronic equipment |
| CN114185460B (en) * | 2021-12-12 | 2023-11-07 | 武汉华星光电半导体显示技术有限公司 | Touch display panel and electronic device |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102112951A (en) * | 2009-05-29 | 2011-06-29 | 索尼公司 | Touch sensor, display and electronic device |
| CN103927047A (en) * | 2013-01-10 | 2014-07-16 | 株式会社日本显示器 | Display device with touch detection function and electronic apparatus |
| CN104516606A (en) * | 2013-09-30 | 2015-04-15 | 株式会社日本显示器 | Touch detection device, display device with touch detection function, and electronic apparatus |
| CN105094479A (en) * | 2015-06-30 | 2015-11-25 | 京东方科技集团股份有限公司 | Touch display panel, preparation method, driving method and display device |
| CN105159490A (en) * | 2015-08-24 | 2015-12-16 | 重庆京东方光电科技有限公司 | Touch display panel and driving method therefor and touch display apparatus |
| CN105913791A (en) * | 2016-06-24 | 2016-08-31 | 厦门天马微电子有限公司 | Display device, array substrate and driving method thereof |
| CN105955522A (en) * | 2016-04-20 | 2016-09-21 | 厦门天马微电子有限公司 | Touch control display and drive method thereof |
| CN205750184U (en) * | 2016-04-29 | 2016-11-30 | 厦门天马微电子有限公司 | Display floater and display device |
| CN106383612A (en) * | 2016-10-11 | 2017-02-08 | 厦门天马微电子有限公司 | Display panel and display device |
-
2017
- 2017-05-04 CN CN201710307578.5A patent/CN107045412B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102112951A (en) * | 2009-05-29 | 2011-06-29 | 索尼公司 | Touch sensor, display and electronic device |
| CN103927047A (en) * | 2013-01-10 | 2014-07-16 | 株式会社日本显示器 | Display device with touch detection function and electronic apparatus |
| CN104516606A (en) * | 2013-09-30 | 2015-04-15 | 株式会社日本显示器 | Touch detection device, display device with touch detection function, and electronic apparatus |
| CN105094479A (en) * | 2015-06-30 | 2015-11-25 | 京东方科技集团股份有限公司 | Touch display panel, preparation method, driving method and display device |
| CN105159490A (en) * | 2015-08-24 | 2015-12-16 | 重庆京东方光电科技有限公司 | Touch display panel and driving method therefor and touch display apparatus |
| CN105955522A (en) * | 2016-04-20 | 2016-09-21 | 厦门天马微电子有限公司 | Touch control display and drive method thereof |
| CN205750184U (en) * | 2016-04-29 | 2016-11-30 | 厦门天马微电子有限公司 | Display floater and display device |
| CN105913791A (en) * | 2016-06-24 | 2016-08-31 | 厦门天马微电子有限公司 | Display device, array substrate and driving method thereof |
| CN106383612A (en) * | 2016-10-11 | 2017-02-08 | 厦门天马微电子有限公司 | Display panel and display device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11789560B2 (en) * | 2021-03-19 | 2023-10-17 | Chongqing Boe Display Technology Co., Ltd. | Touch panel, display panel and display device |
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| Publication number | Publication date |
|---|---|
| CN107045412A (en) | 2017-08-15 |
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