CN110750170B - Embedded touch display panel, driving method thereof and display device - Google Patents
Embedded touch display panel, driving method thereof and display device Download PDFInfo
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- CN110750170B CN110750170B CN201910913631.5A CN201910913631A CN110750170B CN 110750170 B CN110750170 B CN 110750170B CN 201910913631 A CN201910913631 A CN 201910913631A CN 110750170 B CN110750170 B CN 110750170B
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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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- 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
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
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Abstract
An embedded touch display panel, a driving method thereof and a display device belong to the technical field of display. The embedded touch display panel comprises a plurality of scanning lines, a plurality of touch connection lines and a plurality of common electrodes which are arranged in an array, wherein the plurality of touch connection lines are connected with the plurality of common electrodes in a one-to-one correspondence manner, and the working phase of the embedded touch display panel comprises a detection phase and a display phase; the embedded touch display panel further comprises a lower switch circuit and an upper switch circuit; the first end of each touch control connecting wire is connected with the lower switch circuit, and the second end of each touch control connecting wire is connected with the upper switch circuit; the lower switch circuit and the upper switch circuit input consistent common signals for testing to two ends of the same touch control connecting wire in a detection stage, and each common electrode receives signals transmitted by the two touch control connecting wires above and below, so that the influence of scanning signal coupling on the signals on the touch control connecting wire is reduced, and cross grains of a display picture are avoided.
Description
Technical Field
The invention relates to the technical field of display, in particular to an embedded touch display panel, a driving method thereof and a display device.
Background
Currently, in the field of display technology, touch display panels with touch function have become more and more mainstream display products, and touch display panels are mainly divided into In-cell (In-cell), out-of-box (On-cell), and out-of-box (out-cell).
The conventional embedded touch display panel comprises a plurality of common electrodes arranged in an array, wherein the common electrodes are multiplexed into touch electrodes, and each common electrode is electrically connected with an integrated circuit board through a touch connection wire. In normal display, the signals output by the integrated circuit board are delayed and attenuated when transmitted on the touch connection line, and the signals input to the common electrodes are independent, so that the signals received by the common electrodes far from the integrated circuit board and the signals received by the common electrodes close to the integrated circuit board are different. In addition, because the touch connection line and the scanning line are crossed, signals on the touch connection line are easy to couple with scanning signals, so that transverse lines are generated on a display picture, and the image quality of the display panel is affected.
Before the integrated circuit board and the main body of the display panel are bound (bonding), the display panel needs to be tested, the existing test method usually uses a GDC (Gate Line Drive Circuit) lighting mode to test, and the waveform of the scanning signal is controlled to enable the thin film transistor in the display panel to be opened during the test, so that the signal on the touch control connecting line is prevented from being coupled by the scanning signal. And after the integrated circuit board is bound, signal compensation is carried out by using the integrated circuit board, so that the phenomenon of transverse lines in the display stage is avoided. However, the GDC lighting mode easily causes a leakage of the integrated Gate driving circuit (GIA, gate In Array), and the low gray level defect (mura) cannot be tested, so that the driving capability of the integrated circuit board is too dependent In the display stage after the integrated circuit board is bound, and the power consumption and the cost are increased.
The foregoing description is provided for general background information and does not necessarily constitute prior art.
Disclosure of Invention
The invention aims to provide an embedded touch display panel, a driving method thereof and a display device, which reduce the influence of scanning signal coupling on signals on a touch connection line and avoid transverse lines of a display picture.
The invention provides an embedded touch display panel, which comprises a plurality of scanning lines, a plurality of touch connection lines and a plurality of common electrodes which are arranged in an array, wherein the plurality of touch connection lines are connected with the plurality of common electrodes in a one-to-one correspondence manner, and the working stage of the embedded touch display panel comprises a detection stage and a display stage; the circuit also comprises a lower switch circuit and an upper switch circuit; the first end of each touch control connecting wire is connected with the lower switch circuit, and the second end of each touch control connecting wire is connected with the upper switch circuit; and the lower switch circuit and the upper switch circuit input consistent common signals for testing to two ends of the same touch control connecting wire in a detection stage.
Further, the lower switch circuit includes a plurality of first switches, a plurality of second switches, a first gate switch line, a first input signal line, and a second input signal line; the upper switch circuit comprises a plurality of third switches, a plurality of fourth switches, a second grid switch line, a third input signal line and a fourth input signal line; the common electrodes connected with the first switches and the second switches are arranged at intervals in the extending direction of the scanning line, and the common electrodes connected with the first switches and the second switches are arranged at intervals in the direction perpendicular to the scanning line; each third switch and the corresponding first switch are respectively connected to two ends of a touch control connecting wire, and each fourth switch and the corresponding second switch are respectively connected to two ends of a touch control connecting wire.
Further, the control ends of the first switch and the second switch are connected with the first grid switch line, a first passage end of the first switch is connected with a touch control connecting line, a second passage end of the first switch is connected with the first input signal line, a first passage end of the second switch is connected with another touch control connecting line, and a second passage end of the second switch is connected with the second input signal line; the control ends of the third switch and the fourth switch are connected with the second grid switch line, the first passage end of the third switch and the first passage end of the corresponding first switch are respectively connected with two ends of a touch control connecting line, the second passage end of the third switch is connected with the third input signal line, the first passage end of the fourth switch and the first passage end of the corresponding second switch are respectively connected with two ends of a touch control connecting line, and the second passage end of the fourth switch is connected with the fourth input signal line.
Further, the device further comprises a first conductive pad and a second conductive pad; the first conductive pad is electrically connected with the first input signal line and the third input signal line, and receives a first gray-scale signal input from the outside in the detection stage; the second conductive pad is electrically connected with the second input signal line and the fourth input signal line, and receives a second gray scale signal input from the outside in the detection stage.
According to an embodiment of the present invention, the integrated circuit further includes a third conductive pad; the third conductive pad is electrically connected with the first gate switch line and the second gate switch line, and receives an externally input gate switch signal; the gate switch signal controls the first switches, the second switches, the third switches and the fourth switches to be turned on in a detection stage, and controls the first switches, the second switches, the third switches and the fourth switches to be turned off in a display stage; the integrated circuit board is connected with the first ends of the touch connection lines, and common signals are input to the touch connection lines in a display stage.
According to another embodiment of the present invention, further comprising a fourth conductive pad, a fifth conductive pad, and an integrated circuit board; the fourth conductive pad is electrically connected with the first grid switch line, and receives a first grid switch signal input from the outside; the first grid switch signal controls the first switches and the second switches to be opened in a detection stage, and controls the first switches and the second switches to be closed in a display stage; the fifth conductive pad is electrically connected with the second grid switch line, receives a second grid switch signal input from the outside in a detection stage, is electrically connected with the integrated circuit board in a display stage, and receives a third grid switch signal input from the integrated circuit board; the second gate switch signal controls the plurality of third switches and the plurality of fourth switches to be turned on in a detection stage, and the third gate switch signal controls the plurality of third switches and the plurality of fourth switches to be turned on in a display stage; the integrated circuit board is connected with the first ends of the touch connection lines, and a first common signal is input to the first ends of the touch connection lines in a display stage; the integrated circuit board inputs a second common signal to the second end of each touch connection line through the plurality of third switches and the plurality of fourth switches in the display stage and the third input signal line and the fourth input signal line.
Further, the embedded touch display panel is a special-shaped display panel and comprises a special-shaped area and a non-special-shaped area; the upper switch circuit is arranged at one end close to the special-shaped area, and the lower switch circuit is arranged at one end close to the non-special-shaped area; that is, the upper switch circuit is closer to the shaped region than the lower switch circuit, and the lower switch circuit is closer to the non-shaped region than the upper switch circuit.
The invention also provides a driving method of the embedded touch display panel, which is applied to the embedded touch display panel and comprises the following steps:
a detection stage, wherein the first grid switch line controls the first switches and the second switches to be turned on, and the second grid switch line controls the third switches and the fourth switches to be turned on; the first input signal line and the third input signal line input first gray-scale signals to two ends of the same touch control connecting line, and the second input signal line and the fourth input signal line input second gray-scale signals to two ends of the same touch control connecting line;
binding an integrated circuit board to the embedded touch display panel;
a display stage, wherein the first grid switch line controls the first switches and the second switches to be closed, and the second grid switch line controls the third switches and the fourth switches to be closed; the integrated circuit board inputs a common signal to the plurality of touch connection lines.
The invention also provides a driving method of the embedded touch display panel, which is applied to the embedded touch display panel and comprises the following steps:
a detection stage, wherein the first grid switch line controls the first switches and the second switches to be turned on, and the second grid switch line controls the third switches and the fourth switches to be turned on; the first input signal line and the third input signal line input first gray-scale signals to two ends of the same touch control connecting line, and the second input signal line and the fourth input signal line input second gray-scale signals to two ends of the same touch control connecting line;
binding an integrated circuit board to the embedded touch display panel, and electrically connecting the integrated circuit board to the first ends of the touch connecting lines, the second grid switch line, the third input signal line and the fourth input signal line;
a display stage in which the first gate switch line controls the plurality of first switches and the plurality of second switches to be turned off, and the second gate switch line controls the plurality of third switches and the plurality of fourth switches to be turned on; the integrated circuit board inputs a first common signal to the first end of each touch connection line, and inputs a second common signal to the second end of each touch connection line through the plurality of third switches and the plurality of fourth switches.
The invention also provides a display device comprising any embedded touch display panel.
The invention provides an embedded touch display panel, a driving method thereof and a display device.A lower switch circuit and an upper switch circuit input consistent public signals for testing to two ends of the same touch connecting line in a detection stage so as to finish circuit detection, and each public electrode receives signals transmitted by two parts of the touch connecting line above and below in a display stage, so that the influence of scanning signal coupling on the signals on the touch connecting line is reduced, and cross grains of a display picture are avoided.
Drawings
Fig. 1 is a schematic structural diagram of an in-cell touch display panel according to a first embodiment of the invention.
Fig. 2 is a schematic structural diagram of an in-cell touch display panel in a detection stage according to a first embodiment of the present invention.
Fig. 3 is a schematic diagram of a test frame of the in-cell touch display panel shown in fig. 2 in a test stage.
Fig. 4 is a schematic structural diagram of the in-cell touch display panel shown in fig. 2 in a display stage.
Fig. 5 is a schematic structural diagram of an in-cell touch display panel in a detection stage according to a second embodiment of the invention.
Fig. 6 is a schematic structural diagram of the in-cell touch display panel shown in fig. 5 in a display stage.
Fig. 7 is a schematic structural diagram of an in-cell touch display panel according to a third embodiment of the invention.
Detailed Description
The following describes in further detail the embodiments of the present invention with reference to the drawings and examples. The following examples are illustrative of the invention and are not intended to limit the scope of the invention.
First embodiment
Referring to fig. 1 and fig. 2, fig. 1 shows a schematic structural diagram of an in-cell touch display panel according to a first embodiment of the present invention, wherein a working stage of the in-cell touch display panel includes a detection stage and a display stage, the detection stage occurs before bonding (bonding) of an integrated circuit board and a main body of the display panel, and is used for testing the integrity of elements and leads on the display panel, and fig. 2 shows a schematic structural diagram of the in-cell touch display panel in the detection stage.
Referring to fig. 1, the in-cell touch display panel of the present embodiment includes a plurality of scan lines 11 (the scan lines 11 include G1, G2, G3, … …, gn-2, gn-1, gn), a plurality of touch connection lines 12, a plurality of common electrodes 13 arranged in an array, a lower switch circuit 21, and an upper switch circuit 22, and the plurality of touch connection lines 12 are connected in one-to-one correspondence with the plurality of common electrodes 13. The first end of each touch connection line 12 is connected to the lower switch circuit 21, and the second end of each touch connection line 12 is connected to the upper switch circuit 22. The scan lines 11 extend along a first direction, and the plurality of scan lines 11 are arranged at intervals in a second direction, the first direction is perpendicular to the second direction, each scan line 11 is used for transmitting a scan signal to a row of pixel units, and one common electrode 13 corresponds to the plurality of pixel units arranged in a matrix. The touch connection line 12 and the common electrode 13 are located on different layers with an insulating layer sandwiched therebetween, and the common electrode 13 is electrically connected to the touch connection line 12 through a via 130 penetrating through the insulating layer.
The lower switch circuit 21 and the upper switch circuit 22 respectively input identical test common signals to both ends of the same touch connection line 12 in the detection stage, and each common electrode 13 receives the test common signals transmitted by the two touch connection lines 12 above and below. On one hand, the intensity of the public signal for testing received by the public electrode 13 is enhanced, the influence of coupling of the public signal for testing and the scanning signal is reduced, and the display picture is prevented from being provided with transverse lines. On the other hand, the common signals for testing are delayed and attenuated when transmitted on the touch control connecting line 12, and bilateral input can enable the common signals for testing received by the common electrodes 13 to be consistent, so that the difference between the common signals for testing received by the common electrodes 13 far from the output end of the test signals and the common signals for testing received by the common electrodes 13 close to the output end of the test signals is reduced, and the uniformity of pictures is improved.
Specifically, referring to fig. 2, the lower switch circuit 21 includes a plurality of first switches M1, a plurality of second switches M2, a first gate switch line 211, a first input signal line 212, and a second input signal line 213; the upper switch circuit 22 includes a plurality of third switches M3, a plurality of fourth switches M4, a second gate switch line 221, a third input signal line 222, and a fourth input signal line 223. The common electrodes 13 to which the plurality of first switches M1 and the plurality of second switches M2 are connected are disposed at intervals from each other in the extending direction of the scan line 11, and the common electrodes 13 to which the plurality of first switches M1 and the plurality of second switches M2 are connected are disposed at intervals from each other in the direction perpendicular to the scan line 11. Each third switch M3 and the corresponding first switch M1 are respectively connected to two ends of a touch connection line 12, and each fourth switch M4 and the corresponding second switch M2 are respectively connected to two ends of a touch connection line 12.
The control ends of the first switch M1 and the second switch M2 are connected with a first grid switch line 211, a first passage end of the first switch M1 is connected with a touch control connecting line 12, a second passage end of the first switch M1 is connected with a first input signal line 212, a first passage end of the second switch M2 is connected with another touch control connecting line 12, and a second passage end of the second switch M2 is connected with a second input signal line 213. The control ends of the third switch M3 and the fourth switch M4 are connected to the second gate switch line 221, the first path end of the third switch M3 and the first path end of the corresponding first switch M1 are respectively connected to two ends of a touch control connecting line 12, the second path end of the third switch M3 is connected to the third input signal line 222, the first path end of the fourth switch M4 and the first path end of the corresponding second switch M2 are respectively connected to two ends of a touch control connecting line 12, and the second path end of the fourth switch M4 is connected to the fourth input signal line 223.
In this embodiment, the first switch M1, the second switch M2, the third switch M3 and the fourth switch M4 are all thin film transistors, the control end is the gate of the thin film transistor, the first path end is one of the source and the drain, and the second path end is the other of the source and the drain. In other embodiments, the first switch M1, the second switch M2, the third switch M3, and the fourth switch M4 may be other elements having switching properties.
In the detection stage, the first gate switch line 211 and the second gate switch line 221 transmit the same gate switch signal, the first input signal line 212 and the third input signal line 222 transmit the same first gray scale signal, and the second input signal line 213 and the fourth input signal line 223 transmit the same second gray scale signal. In this embodiment, the common signal for test corresponding to the first input signal line 212 and the third input signal line 222 is a first gray scale signal, the common signal for test corresponding to the second input signal line 213 and the fourth input signal line 223 is a second gray scale signal, and the potentials of the first gray scale signal and the second gray scale signal are different.
Further, the embedded touch display panel of the present embodiment further includes a first conductive pad 31, a second conductive pad 32, and a third conductive pad 33, and the external test device is electrically connected to the first conductive pad 31, the second conductive pad 32, and the third conductive pad 33 through probes or other contact methods in the detection stage, and inputs signals thereto. The first conductive pad 31 is electrically connected to the first input signal line 212 and the third input signal line 222, and the first conductive pad 31 receives a first gray-scale signal input from the outside in the detection stage. The second conductive pad 32 is electrically connected to the second input signal line 213 and the fourth input signal line 223, and the second conductive pad 32 receives the second gray scale signal input from the outside in the detection stage. The third conductive pad 33 is electrically connected to the first gate switch line 211 and the second gate switch line 221, and the third conductive pad 33 receives an externally input gate switch signal, which controls the first switches M1, the second switches M2, the third switches M3, and the fourth switches M4 to be turned on in a detection phase, and controls the first switches M1, the second switches M2, the third switches M3, and the fourth switches M4 to be turned off in a display phase.
Referring to fig. 3, fig. 3 is a schematic diagram illustrating a test frame of the in-cell touch display panel in the test stage according to the present embodiment. In the detection stage, the first gray-scale signal and the second gray-scale signal have different electric potentials, so that the display panel presents a detection picture as shown in fig. 3, the detection picture includes a first gray-scale area 13a and a second gray-scale area 13b, each of the first gray-scale area 13a and the second gray-scale area 13b corresponds to one common electrode 13, the first gray-scale area 13a and the second gray-scale area 13b are staggered in the extending direction of the scan line 11, and the first gray-scale area 13a and the second gray-scale area 13b are staggered in the direction perpendicular to the scan line 11. If the display screen of the display panel is the detection screen as shown in fig. 3 and the screen of each first gray scale area 13a is uniform and the screen of each second gray scale area 13b is uniform in the actual detection stage, each common electrode 13 and touch connection line 12 can work normally, and the test result is qualified.
The embedded touch display panel of the embodiment reduces the influence of the scanning signal coupling on the signal on the touch connection line 12 in the detection stage, and avoids the occurrence of cross stripes, so that the GDC lighting mode is not required, the common electrode 13, the touch connection line 12 and the GIA circuit on the side edge of the display panel can be completely tested, and the gate driving circuit can not be missed.
The in-cell touch display panel of the present embodiment further includes an integrated circuit board 40, and the integrated circuit board 40 is bound with the main body of the display panel after the detection stage. Fig. 4 is a schematic structural diagram of the in-cell touch display panel in the display stage according to the present embodiment. The integrated circuit board 40 is connected to the first ends of the touch connection lines 12, and inputs a common signal to the touch connection lines 12 in the display stage. The common electrode 13 is multiplexed as a touch electrode to realize self-capacitive touch, so that one frame scan time of the display stage is divided into an active period and a touch period. The common electrode 13 receives a common signal during an effective period and generates an electric field control screen display. In the touch period, the common signal received by the common electrode 13 is actually a touch driving signal, the common electrode 13 senses a touch position to generate a touch sensing signal, the touch sensing signal is input into the integrated circuit board 40, and the integrated circuit board 40 determines the touch position according to the touch sensing signal.
The embodiment also provides a driving method of the in-cell touch display panel, which is applied to the in-cell touch display panel, and the driving method comprises the following steps:
in the detection stage, the first gate switch line 211 controls the first switches M1 and the second switches M2 to be turned on, and the second gate switch line 221 controls the third switches M3 and the fourth switches M4 to be turned on; the first input signal line 212 and the third input signal line 222 input first gray-scale signals to both ends of the same touch connection line 12, and the second input signal line 213 and the fourth input signal line 223 input second gray-scale signals to both ends of the same touch connection line 12;
binding the integrated circuit board 40 to the in-cell touch display panel;
in the display stage, the first gate switch line 211 controls the first switches M1 and the second switches M2 to be turned off, and the second gate switch line 221 controls the third switches M3 and the fourth switches M4 to be turned off; the integrated circuit board 40 inputs a common signal to the plurality of touch link lines 12.
Second embodiment
Referring to fig. 5 and fig. 6, fig. 5 is a schematic structural diagram of an in-cell touch display panel in a detection stage according to a second embodiment of the invention, and fig. 6 is a schematic structural diagram of the in-cell touch display panel in a display stage. The difference from the first embodiment is that the first gate switch line 211 and the second gate switch signal are not electrically connected through the third conductive pad 33, the embedded touch display panel of the present embodiment includes the fourth conductive pad 34, the fifth conductive pad 35 and the integrated circuit board 40, the fourth conductive pad 34 is electrically connected to the first gate switch line 211, and the fifth conductive pad 35 is electrically connected to the second gate switch line 221.
The fourth conductive pad 34 receives a first gate switching signal inputted from the outside, and the first gate switching signal controls the plurality of first switches M1 and the plurality of second switches M2 to be turned on in a detection phase, and controls the plurality of first switches M1 and the plurality of second switches M2 to be turned off in a display phase. The fifth conductive pad 35 receives the second gate switch signal input from the outside in the detection stage, is electrically connected with the integrated circuit board 40 in the display stage, and receives the third gate switch signal input from the integrated circuit board 40; the second gate switching signal controls the plurality of third switches M3 and the plurality of fourth switches M4 to be turned on in the detection stage, and the third gate switching signal controls the plurality of third switches M3 and the plurality of fourth switches M4 to be turned on in the display stage.
The integrated circuit board 40 is bound with the main body of the display panel after the detection stage, the integrated circuit board 40 is connected with the first ends of the touch connection lines 12, and a first common signal is input to the first ends of the touch connection lines 12 during the display stage. The integrated circuit board 40 is electrically connected to the third input signal line 222 and the fourth input signal line 223 in the display stage, and inputs the second common signal to the second end of each touch connection line 12 through the opened third switches M3 and fourth switches M4.
In the display stage, the integrated circuit board 40 inputs the first common signal and the second common signal to the first end and the second end of the same touch connection line 12, respectively. In this embodiment, the first common signal and the second common signal are consistent, and each common electrode 13 receives signals transmitted by the two touch connection lines 12 above and below. On the one hand, the superposition of the first public signal and the second public signal enhances the intensity of the superposition signal received by the public electrode 13, reduces the influence of the coupling of scanning signals on the signal on the touch connection line 12, and avoids the occurrence of transverse lines of a display picture. On the other hand, when signals are transmitted on the touch connection line 12, delay and attenuation can occur, the bilateral input can enable the superposition signals received by the public electrodes 13 to be consistent, the difference between the superposition signals received by the public electrodes 13 far from the integrated circuit board 40 and the superposition signals received by the public electrodes 13 close to the integrated circuit board 40 is reduced, and the uniformity of pictures is improved.
The embodiment also provides a driving method of the in-cell touch display panel, which is applied to the in-cell touch display panel of the embodiment, and the driving method comprises the following steps:
in the detection stage, the first gate switch line 211 controls the first switches M1 and the second switches M2 to be turned on, and the second gate switch line 221 controls the third switches M3 and the fourth switches M4 to be turned on; the first input signal line 212 and the third input signal line 222 input first gray-scale signals to both ends of the same touch connection line 12, and the second input signal line 213 and the fourth input signal line 223 input second gray-scale signals to both ends of the same touch connection line 12;
binding the integrated circuit board 40 to the embedded touch display panel, so that the integrated circuit board 40 is electrically connected to the first ends of the plurality of touch connection lines 12, the second gate switch line 221, the third input signal line 222 and the fourth input signal line 223;
in the display stage, the first gate switch line 211 controls the first switches M1 and the second switches M2 to be turned off, and the second gate switch line 221 controls the third switches M3 and the fourth switches M4 to be turned on; the integrated circuit board 40 inputs a first common signal to the first end of each touch link 12, and inputs a second common signal to the second end of each touch link 12 through the plurality of third switches M3 and the plurality of fourth switches M4.
Third embodiment
The third embodiment of the present invention provides an in-cell touch display panel, which is different from the second embodiment in that the first common signal and the second common signal are inconsistent.
In the display stage, the second common signal is a compensation signal adjusted according to defects such as cross lines, and is used for performing superposition compensation on the first common signal received by the common electrode 13. Alternatively, the first common signal is a compensation signal adjusted according to a defect such as a cross grain, and is used for superimposed compensation of the second common signal received by the common electrode 13.
Preferably, the in-cell touch display panel of the present embodiment is a special-shaped display panel. Referring to fig. 7, the special-shaped display panel includes a special-shaped region 51 and a non-special-shaped region 52, the upper switch circuit 22 is disposed near one end of the special-shaped region 51, and the lower switch circuit 21 is disposed near one end of the non-special-shaped region 52; that is, the upper switching circuit 22 is closer to the shaped region 51 than the lower switching circuit 21, and the lower switching circuit 21 is closer to the non-shaped region 52 than the upper switching circuit 22, wherein the common electrode 13 located in the non-shaped region 52 has a uniform area, and the area of a portion of the common electrode 13 located in the shaped region 51 is uneven, and it is necessary to control the integrated circuit board 40 to individually output a specific common signal to the common electrode 13 located in the shaped region 51 in the related art. In this embodiment, the first common signal is a compensation signal adjusted according to the distribution of the common electrode 13 in the shaped region 51, or the second common signal is a compensation signal adjusted according to the distribution of the common electrode 13 in the shaped region 51.
The invention also discloses a display device comprising any embedded touch display panel.
The invention provides an embedded touch display panel, a driving method thereof and a display device.A lower switch circuit 21 and an upper switch circuit 22 input consistent public signals for testing to two ends of the same touch connecting line 12 in a detection stage so as to finish circuit detection, and each public electrode 13 receives signals transmitted by two parts of the touch connecting lines 12 above and below in a display stage, thereby reducing the influence of scanning signal coupling on the signals on the touch connecting lines and avoiding cross grains of a display picture.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, the scope of the description of the present invention should be considered as long as the combinations of the technical features are not contradictory.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (9)
1. An embedded touch display panel comprises a plurality of scanning lines (11), a plurality of touch connecting lines (12) and a plurality of common electrodes (13) which are arranged in an array, wherein the plurality of touch connecting lines (12) are connected with the plurality of common electrodes (13) in a one-to-one correspondence manner, and the working phase of the embedded touch display panel comprises a detection phase and a display phase; the circuit is characterized by further comprising a lower switch circuit (21) and an upper switch circuit (22); the first end of each touch control connecting wire (12) is connected with the lower switch circuit (21), the second end of each touch control connecting wire (12) is connected with the upper switch circuit (22), and the lower switch circuit (21) comprises a plurality of first switches (M1), a plurality of second switches (M2), a first grid switch wire (211), a first input signal wire (212) and a second input signal wire (213); the upper switch circuit (22) comprises a plurality of third switches (M3), a plurality of fourth switches (M4), a second gate switch line (221), a third input signal line (222) and a fourth input signal line (223); the common electrodes (13) to which the plurality of first switches (M1) and the plurality of second switches (M2) are connected are arranged at intervals in the extending direction of the scanning line (11), and the common electrodes (13) to which the plurality of first switches (M1) and the plurality of second switches (M2) are connected are arranged at intervals in the direction perpendicular to the scanning line (11); each third switch (M3) and the corresponding first switch (M1) are respectively connected to two ends of one touch control connecting line (12), and each fourth switch (M4) and the corresponding second switch (M2) are respectively connected to two ends of one touch control connecting line (12);
the lower switch circuit (21) and the upper switch circuit (22) input identical common signals for testing to two ends of the same touch control connecting line (12) in a detection stage.
2. The in-cell touch display panel according to claim 1, wherein control ends of the first switch (M1) and the second switch (M2) are connected to the first gate switch line (211), a first path end of the first switch (M1) is connected to a touch connection line (12), a second path end of the first switch (M1) is connected to the first input signal line (212), a first path end of the second switch (M2) is connected to another touch connection line (12), and a second path end of the second switch (M2) is connected to the second input signal line (213);
the control end of the third switch (M3) and the control end of the fourth switch (M4) are connected with the second grid switch line (221), the first passage end of the third switch (M3) and the first passage end of the corresponding first switch (M1) are respectively connected with two ends of a touch control connecting line (12), the second passage end of the third switch (M3) is connected with the third input signal line (222), the first passage end of the fourth switch (M4) and the first passage end of the corresponding second switch (M2) are respectively connected with two ends of the touch control connecting line (12), and the second passage end of the fourth switch (M4) is connected with the fourth input signal line (223).
3. The in-cell touch display panel according to claim 2, further comprising a first conductive pad (31) and a second conductive pad (32);
the first conductive pad (31) is electrically connected with the first input signal line (212) and the third input signal line (222), and the first conductive pad (31) receives a first gray-scale signal input from the outside in a detection stage;
the second conductive pad (32) is electrically connected with the second input signal line (213) and the fourth input signal line (223), and the second conductive pad (32) receives a second gray scale signal input from the outside in the detection stage.
4. An in-cell touch display panel according to claim 3, further comprising a third conductive pad (33) and an integrated circuit board (40);
the third conductive pad (33) is electrically connected with the first gate switch line (211) and the second gate switch line (221), and the third conductive pad (33) receives an externally input gate switch signal; the gate switching signal controls the plurality of first switches (M1), the plurality of second switches (M2), the plurality of third switches (M3), and the plurality of fourth switches (M4) to be turned on in a detection phase, and controls the plurality of first switches (M1), the plurality of second switches (M2), the plurality of third switches (M3), and the plurality of fourth switches (M4) to be turned off in a display phase;
the integrated circuit board (40) is connected with the first ends of the touch connection lines (12), and common signals are input to the touch connection lines (12) in a display stage.
5. The in-cell touch display panel of claim 3, further comprising a fourth conductive pad (34), a fifth conductive pad (35), and an integrated circuit board (40);
the fourth conductive pad (34) is electrically connected with the first gate switch line (211), and the fourth conductive pad (34) receives a first gate switch signal input from the outside; the first gate switching signal controls the plurality of first switches (M1) and the plurality of second switches (M2) to be turned on in a detection phase, and controls the plurality of first switches (M1) and the plurality of second switches (M2) to be turned off in a display phase;
the fifth conductive pad (35) is electrically connected with the second gate switch line (221), the fifth conductive pad (35) receives a second gate switch signal input from the outside in a detection stage, the fifth conductive pad (35) is electrically connected with the integrated circuit board (40) in a display stage, and receives a third gate switch signal input from the integrated circuit board (40); the second gate switch signal controls the plurality of third switches (M3) and the plurality of fourth switches (M4) to be turned on in a detection phase, and the third gate switch signal controls the plurality of third switches (M3) and the plurality of fourth switches (M4) to be turned on in a display phase;
the integrated circuit board (40) is connected with the first ends of the touch connection lines (12), and a first common signal is input to the first ends of the touch connection lines (12) in a display stage; the integrated circuit board (40) is connected with the third input signal line (222) and the fourth input signal line (223) in a display stage, and inputs a second common signal to the second end of each touch connection line (12) through the plurality of third switches (M3) and the plurality of fourth switches (M4).
6. The in-cell touch display panel according to claim 1, wherein the in-cell touch display panel is a shaped display panel comprising a shaped region (51) and a non-shaped region (52); the upper switch circuit (22) is arranged at one end close to the special-shaped area (51), and the lower switch circuit (21) is arranged at one end close to the non-special-shaped area (52).
7. The method for driving an in-cell touch display panel according to claim 1, the method comprising:
a detection stage, wherein the first gate switch line (211) controls the first switches (M1) and the second switches (M2) to be turned on, and the second gate switch line (221) controls the third switches (M3) and the fourth switches (M4) to be turned on; the first input signal line (212) and the third input signal line (222) input first gray-scale signals to two ends of the same touch control connecting line (12), and the second input signal line (213) and the fourth input signal line (223) input second gray-scale signals to two ends of the same touch control connecting line (12);
binding an integrated circuit board (40) to the in-cell touch display panel;
a display stage in which the first gate switch line (211) controls the plurality of first switches (M1) and the plurality of second switches (M2) to be turned off, and the second gate switch line (221) controls the plurality of third switches (M3) and the plurality of fourth switches (M4) to be turned off; the integrated circuit board (40) inputs a common signal to the plurality of touch connection lines (12).
8. The method for driving an in-cell touch display panel according to claim 1, the method comprising:
a detection stage, wherein the first gate switch line (211) controls the first switches (M1) and the second switches (M2) to be turned on, and the second gate switch line (221) controls the third switches (M3) and the fourth switches (M4) to be turned on; the first input signal line (212) and the third input signal line (222) input first gray-scale signals to two ends of the same touch control connecting line (12), and the second input signal line (213) and the fourth input signal line (223) input second gray-scale signals to two ends of the same touch control connecting line (12);
binding an integrated circuit board (40) to the embedded touch display panel, so that the integrated circuit board (40) is electrically connected to the first ends of the plurality of touch connection lines (12), the second gate switch line (221), the third input signal line (222) and the fourth input signal line (223);
a display stage in which the first gate switch line (211) controls the plurality of first switches (M1) and the plurality of second switches (M2) to be turned off, and the second gate switch line (221) controls the plurality of third switches (M3) and the plurality of fourth switches (M4) to be turned on; the integrated circuit board (40) inputs a first common signal to a first end of each touch connection line (12), and inputs a second common signal to a second end of each touch connection line (12) through the plurality of third switches (M3) and the plurality of fourth switches (M4).
9. A display device comprising the in-cell touch display panel according to any one of claims 1 to 6.
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| CN109614014A (en) * | 2019-02-12 | 2019-04-12 | 合肥京东方光电科技有限公司 | Driving method, touch control display and the touch-control display driver circuit of pixel unit |
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| CN106652870A (en) * | 2016-11-24 | 2017-05-10 | 厦门天马微电子有限公司 | Display device, display panel and driving method thereof |
| CN107358930A (en) * | 2017-08-31 | 2017-11-17 | 京东方科技集团股份有限公司 | A kind of In-cell touch panel, its driving method and display device |
| CN109213380A (en) * | 2018-11-12 | 2019-01-15 | 京东方科技集团股份有限公司 | Input control circuit and method, input control device, display panel |
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