CN110750170A - 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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- CN110750170A CN110750170A CN201910913631.5A CN201910913631A CN110750170A CN 110750170 A CN110750170 A CN 110750170A CN 201910913631 A CN201910913631 A CN 201910913631A CN 110750170 A CN110750170 A CN 110750170A
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- 238000001514 detection method Methods 0.000 claims abstract description 40
- 238000012360 testing method Methods 0.000 claims abstract description 30
- 230000008878 coupling Effects 0.000 abstract description 6
- 238000010168 coupling process Methods 0.000 abstract description 6
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- 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 connecting lines and a plurality of public electrodes arranged in an array manner, wherein the touch connecting lines are connected with the public 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 embedded touch display panel also comprises a lower switch circuit and an upper switch circuit; the first end of each touch control connecting line is connected with the lower switch circuit, and the second end of each touch control connecting line 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 connecting line in a detection stage, and each common electrode receives signals transmitted by the two touch connecting lines above and below, so that the influence of scanning signal coupling on the signals on the touch connecting lines is reduced, and the display picture is prevented from generating horizontal stripes.
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 technologies, touch display panels with touch functions have become more and more mainstream display products, and the touch display panels are mainly classified into In-cell (In-cell), On-cell (On-cell) and external display.
The existing embedded touch display panel comprises a plurality of common electrodes which are arranged in an array, the common electrodes are reused as touch electrodes, and each common electrode is electrically connected with an integrated circuit board through a touch connecting wire. When a picture is normally displayed, because the signals output by the integrated circuit board are delayed and attenuated when transmitted on the touch connection line, and the signals input into the common electrodes are independent, the signals received by the common electrodes far away from the integrated circuit board are different from the signals received by the common electrodes close to the integrated circuit board. Moreover, since the touch connection lines and the scan lines are crossed, signals on the touch connection lines are easily coupled by the scan signals, which causes horizontal stripes on the display screen and affects the image quality of the display panel.
Before the integrated circuit board is bound (bonding) with the main body of the display panel, the display panel needs to be tested, the existing test method usually utilizes a gdc (gate Line Drive circuit) lighting mode to test, and the waveforms of the scanning signals are controlled to make the thin film transistors in the display panel open during the test, so as to avoid the signals on the touch connecting lines from being coupled by the scanning signals. And then the integrated circuit board is utilized to perform signal compensation after the integrated circuit board is bound, so that the phenomenon of cross striation in the display stage is avoided. However, the GDC lighting mode easily causes the missing inspection of the integrated Gate driving circuit (GIA, Gate In Array), and the poor (mura) of the low gray scale cannot be tested, and the display stage after the integrated circuit board is bound is too dependent on the driving capability of the integrated circuit board, thereby increasing the power consumption and the cost.
The foregoing description is provided for general background information and is not admitted to be prior art.
Disclosure of Invention
The invention aims to provide an embedded touch display panel, a driving method thereof and a display device, which can reduce the influence of scanning signal coupling on signals on touch connecting lines and avoid the display picture from generating horizontal stripes.
The invention provides an embedded touch display panel, which comprises a plurality of scanning lines, a plurality of touch connecting lines and a plurality of public electrodes arranged in an array, wherein the touch connecting lines are connected with the public 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 line is connected with the lower switch circuit, and the second end of each touch control connecting line 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 line 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 includes a plurality of third switches, a plurality of fourth switches, a second gate switch line, a third input signal line, and a fourth input signal line; the common electrodes to which the plurality of first switches and the plurality of second switches are connected are disposed at intervals from each other in an extending direction of the scanning line, and the common electrodes to which the plurality of first switches and the plurality of second switches are connected are disposed at intervals from each other in a direction perpendicular to the scanning line; each third switch and the corresponding first switch are respectively connected to two ends of one touch control connecting line, and each fourth switch and the corresponding second switch are respectively connected to two ends of one touch control connecting line.
Furthermore, the control ends of the first switch and the second switch are connected to the first gate switch line, the first path end of the first switch is connected to one touch control connection line, the second path end of the first switch is connected to the first input signal line, the first path end of the second switch is connected to another touch control connection line, and the second path end of the second switch is connected to 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 access end of the third switch and the first access end of the corresponding first switch are respectively connected to two ends of a touch control connecting line, the second access end of the third switch is connected with the third input signal line, the first access end of the fourth switch and the first access end of the corresponding second switch are respectively connected to two ends of the touch control connecting line, and the second access end of the fourth switch is connected with the fourth input signal line.
Further, the electric tool also comprises a first electric conduction pad and a second electric conduction 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 a detection stage; the second conductive pad is electrically connected to the second input signal line and the fourth input signal line, and the second conductive pad receives a second gray scale signal input from the outside during the detection stage.
According to an embodiment of the invention, the integrated circuit further comprises a third conductive pad and an integrated circuit board; the third conductive pad is electrically connected to 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 plurality of first switches, the plurality of second switches, the plurality of third switches and the plurality of fourth switches to be turned on in a detection phase and controls the plurality of first switches, the plurality of second switches, the plurality of third switches and the plurality of fourth switches to be turned off in a display phase; the integrated circuit board is connected with the first ends of the touch control connecting lines, and common signals are input into the touch control connecting lines in a display stage.
According to another embodiment of the present invention, the integrated circuit further includes a fourth conductive pad, a fifth conductive pad, and an integrated circuit board; the fourth conductive pad is electrically connected with the first gate switch line, and receives a first gate switch signal input from the outside; the first grid switch signal controls the plurality of first switches and the plurality of second switches to be turned on in a detection stage, and controls the plurality of first switches and the plurality of second switches to be turned off in a display stage; the fifth conductive pad is electrically connected with the second grid switch wire, 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 by the integrated circuit board; the second gate switch signal controls the plurality of third switches and the plurality of fourth switches to be opened in a detection stage, and the third gate switch signal controls the plurality of third switches and the plurality of fourth switches to be opened in a display stage; the integrated circuit board is connected with the first ends of the touch control connecting lines, and a first public signal is input to the first ends of the touch control connecting lines in a display stage; and the integrated circuit board inputs a second common signal to the second end of each touch connecting line through the plurality of third switches and the plurality of fourth switches in a display stage and the third input signal line and the fourth input signal line.
Furthermore, the in-cell 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 non-shaped region than the lower switch circuit is, and the lower switch circuit is closer to the shaped region than the upper switch circuit is.
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 phase, wherein the first grid switch line controls the plurality of first switches and the plurality of second switches to be turned on, and the second grid switch line controls the plurality of third switches and the plurality of 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 phase 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 off; and the integrated circuit board inputs a common signal to the touch control connecting 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 phase, wherein the first grid switch line controls the plurality of first switches and the plurality of second switches to be turned on, and the second grid switch line controls the plurality of third switches and the plurality of 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 in-cell touch display panel, so that the integrated circuit board is electrically connected to the first ends of the touch connecting lines, the second gate switch line, the third input signal line and the fourth input signal line;
a display phase in which the first gate switch line controls the plurality of first switches and the plurality of second switches to be closed, and the second gate switch line controls the plurality of third switches and the plurality of fourth switches to be open; the integrated circuit board inputs a first common signal to the first end of each touch connecting line, and inputs a second common signal to the second end of each touch connecting line through the third switches and the fourth switches.
The invention also provides a display device which comprises any one of the embedded touch display panels.
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 common signals for testing to two ends of the same touch connecting line in a detection stage so as to complete circuit detection.
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 testing stage according to a first embodiment of the invention.
Fig. 3 is a schematic view of a test frame of the in-cell touch display panel shown in fig. 2 during a testing stage.
Fig. 4 is a schematic structural diagram of the in-cell touch display panel shown in fig. 2 at a display stage.
Fig. 5 is a schematic structural diagram of an in-cell touch display panel in a testing 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 at 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 detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
First embodiment
Referring to fig. 1 and 2, fig. 1 shows a schematic structure diagram of an in-cell touch display panel according to a first embodiment of the present invention, the working phase of the in-cell touch display panel includes a detection phase and a display phase, the detection phase occurs before the integrated circuit board is bonded (bonding) with the main body of the display panel for testing the integrity of the devices and the leads on the display panel, and fig. 2 shows the schematic structure diagram of the in-cell touch display panel in the detection phase.
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, and 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, wherein the plurality of touch connection lines 12 are connected to the plurality of common electrodes 13 in a one-to-one correspondence. A first end of each touch connecting line 12 is connected to the lower switch circuit 21, and a second end of each touch connecting line 12 is connected to the upper switch circuit 22. The scanning lines 11 extend along a first direction, the scanning lines 11 are arranged at intervals in a second direction, the first direction is perpendicular to the second direction, each scanning line 11 is used for transmitting a scanning signal to a row of pixel units, and one common electrode 13 corresponds to a plurality of pixel units arranged in a matrix. The touch connecting line 12 and the common electrode 13 are located at different layers with an insulating layer interposed therebetween, and the common electrode 13 is electrically connected to the touch connecting line 12 through a via hole 130 penetrating through the insulating layer.
The lower switch circuit 21 and the upper switch circuit 22 respectively input the same common signal for testing to two ends of the same touch connection line 12 in the detection stage, and each common electrode 13 receives the common signal for testing transmitted by the two touch connection lines 12 above and below. On one hand, the strength of the common signal received by the common electrode 13 for testing is enhanced, the influence of the coupling of the common signal for testing and the scanning signal is reduced, and the display picture is prevented from generating horizontal stripes. On the other hand, the common signal for testing is delayed and attenuated when transmitted on the touch connecting line 12, the common signal for testing received by each common electrode 13 tends to be consistent by bilateral input, the difference between the common signal for testing received by the common electrode 13 far away from the output end of the test signal and the common signal for testing received by the common electrode 13 close to the output end of the test signal is reduced, and the uniformity of the picture 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 scanning lines 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 scanning lines 11. Each third switch M3 and the corresponding first switch M1 are respectively connected to two ends of one touch connection line 12, and each fourth switch M4 and the corresponding second switch M2 are respectively connected to two ends of one touch connection line 12.
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 one 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 the other touch connection line 12, and a second path end of the second switch M2 is connected to the second input signal line 213. Control ends of the third switch M3 and the fourth switch M4 are connected to the second gate switch line 221, a first path end of the third switch M3 and a first path end of the corresponding first switch M1 are respectively connected to two ends of one touch connection line 12, a second path end of the third switch M3 is connected to the third input signal line 222, a first path end of the fourth switch M4 and a first path end of the corresponding second switch M2 are respectively connected to two ends of one touch connection line 12, and a 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 terminal is a gate of the thin film transistor, the first via terminal is one of a source and a drain, and the second via terminal 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 phase, 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 testing 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 testing 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 in-cell 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, wherein an external test device is electrically connected to the first conductive pad 31, the second conductive pad 32 and the third conductive pad 33 through a probe or other contact methods during a testing stage, and inputs signals to the first conductive pad 31, the second conductive pad 32 and the third conductive pad 33. The first pad 31 is electrically connected to the first input signal line 212 and the third input signal line 222, and the first pad 31 receives a first gray scale signal inputted from the outside during the detection stage. The second pad 32 is electrically connected to the second input signal line 213 and the fourth input signal line 223, and the second pad 32 receives a second gray scale signal inputted from the outside during the testing stage. The third conductive pad 33 is electrically connected to the first gate switch line 211 and the second gate switch line 221, the third conductive pad 33 receives a gate switch signal inputted from the outside, the gate switch 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 the 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 the display phase.
Referring to fig. 3, fig. 3 is a schematic view of a test frame of the in-cell touch display panel of the embodiment in the inspection stage. In the detection stage, the first gray scale signal and the second gray scale signal have different potentials, so that the display panel presents a detection picture as shown in fig. 3, the detection picture includes a first gray scale region 13a and a second gray scale region 13b, each of the first gray scale region 13a or the second gray scale region 13b corresponds to one common electrode 13, the first gray scale region 13a and the second gray scale region 13b are arranged in a staggered manner in the extending direction of the scan line 11, and the first gray scale region 13a and the second gray scale region 13b are arranged in a staggered manner in the direction perpendicular to the scan line 11. If the display frame of the display panel is the detection frame as shown in fig. 3 in the actual detection stage, and the frames of the first gray scale regions 13a are uniform, and the frames of the second gray scale regions 13b are uniform, the common electrodes 13 and the touch connection lines 12 can normally work, and the test result is qualified.
In the detection stage, the embedded touch display panel of the embodiment reduces the influence of the scanning signal coupling on the signal on the touch connecting line 12, and avoids the occurrence of cross striations, so that a GDC lighting mode is not required, the common electrode 13, the touch connecting line 12 and a GIA circuit on the side of the display panel can be completely tested, and the omission of a gate drive circuit is avoided.
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 to the main body of the display panel after the inspection stage. Fig. 4 is a schematic structural diagram of the in-cell touch display panel of the present embodiment at the display stage. The integrated circuit board 40 is connected to the first end of each touch connection line 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-contained touch, so that one frame of scanning time in the display stage is divided into an effective period and a touch period. In the active period, the common electrode 13 receives a common signal and generates an electric field to control picture display. In the touch time interval, 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, and the touch sensing signal is input to 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 comprises the following steps:
in the detection phase, the first gate switch line 211 controls the plurality of first switches M1 and the plurality of second switches M2 to be turned on, 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 first input signal line 212 and the third input signal line 222 input a first gray scale signal 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 a second gray scale signal to both ends of the same touch connection line 12;
binding the integrated circuit board 40 to the in-cell touch display panel;
during the display period, 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.
Second embodiment
Referring to fig. 5 and 6, fig. 5 is a schematic diagram illustrating a structure 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 diagram illustrating a structure 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, and the in-cell touch display panel of the present embodiment includes a fourth conductive pad 34, a fifth conductive pad 35 and the integrated circuit board 40, wherein 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 pad 34 receives a first gate switch signal inputted from the outside, and the first gate switch signal controls the plurality of first switches M1 and the plurality of second switches M2 to be turned on during the detecting phase, and controls the plurality of first switches M1 and the plurality of second switches M2 to be turned off during the displaying phase. The fifth pad 35 receives a second gate switching signal input from the outside in the detection stage, is electrically connected to the integrated circuit board 40 in the display stage, and receives a third gate switching 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 during the sensing phase, and the third gate switching signal controls the plurality of third switches M3 and the plurality of fourth switches M4 to be turned on during the display phase.
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 to the first end of each touch connection line 12, and the first common signal is input to the first end of each touch connection line 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 during the display period, and inputs a second common signal to the second end of each touch connection line 12 through the plurality of open third switches M3 and the plurality of open 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 the present embodiment, the first common signal and the second common signal are the same, and each common electrode 13 receives signals transmitted by the two touch connection lines 12 above and below. On one hand, the first common signal and the second common signal are superposed to enhance the strength of the superposed signal received by the common electrode 13, so that the influence of the coupling of the scanning signal on the touch connecting line 12 is reduced, and the display picture is prevented from generating horizontal stripes. On the other hand, when the signals are transmitted on the touch connecting line 12, delay and attenuation occur, the bilateral input can enable the superposed signals received by the common electrodes 13 to tend to be consistent, the difference between the superposed signals received by the common electrodes 13 far away from the integrated circuit board 40 and the superposed signals received by the common electrodes 13 close to the integrated circuit board 40 is reduced, and the uniformity of the picture 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 phase, the first gate switch line 211 controls the plurality of first switches M1 and the plurality of second switches M2 to be turned on, 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 first input signal line 212 and the third input signal line 222 input a first gray scale signal 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 a second gray scale signal to both ends of the same touch connection line 12;
binding the integrated circuit board 40 to the in-cell touch display panel, such that the integrated circuit board 40 is electrically connected to the first ends of the plurality of touch connecting lines 12, the second gate switch line 221, the third input signal line 222, and the fourth input signal line 223;
in the display phase, 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.
Third embodiment
A third embodiment of the 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 not identical.
In the display stage, the second common signal is a compensation signal adjusted according to a defect such as a horizontal streak, and the second common signal 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 horizontal streak, and the first common signal is used for performing superposition compensation on the second common signal received by the common electrode 13.
Preferably, the in-cell touch display panel of the embodiment is a special-shaped display panel. Referring to fig. 7, the special-shaped display panel includes a special-shaped area 51 and a non-special-shaped area 52, the upper switch circuit 22 is disposed near one end of the special-shaped area 51, and the lower switch circuit 21 is disposed near one end of the non-special-shaped area 52; that is, the upper switch circuit 22 is closer to the irregular region 51 than the lower switch circuit 21, and the lower switch circuit 21 is closer to the non-irregular region 52 than the upper switch circuit 22, wherein the common electrode 13 in the non-irregular region 52 has a uniform area, and the areas of the portions of the common electrode 13 in the irregular region 51 are not uniform, so that the control integrated circuit board 40 needs to individually output a specific common signal to the common electrode 13 in the irregular region 51. In this embodiment, the first common signal is a compensation signal adjusted according to the distribution of the common electrodes 13 in the special-shaped area 51, or the second common signal is a compensation signal adjusted according to the distribution of the common electrodes 13 in the special-shaped area 51.
The invention also discloses a display device which comprises any one of the embedded touch display panels.
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 common signals for testing to two ends of the same touch connecting line 12 in a detection stage to complete circuit detection, and each common electrode 13 receives signals transmitted by two parts of touch connecting lines 12 above and below in a display stage, so that the influence of scanning signal coupling on the signals on the touch connecting lines is reduced, and the display picture is prevented from generating cross striations.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, however, as long as the combinations of the technical features are not contradictory, the scope of the present description should be considered as being described in the present specification.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. An in-cell 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) and the plurality of common electrodes (13) are correspondingly connected one by one, and the working stage of the in-cell touch display panel comprises a detection stage and a display stage; characterized in that the device also comprises a lower switch circuit (21) and an upper switch circuit (22); the first end of each touch control connecting line (12) is connected with the lower switch circuit (21), and the second end of each touch control connecting line (12) is connected with the upper switch circuit (22);
and the lower switch circuit (21) and the upper switch circuit (22) input consistent common signals for testing to two ends of the same touch connecting line (12) in a detection stage.
2. The in-cell touch display panel according to claim 1, wherein the bottom switch circuit (21) comprises 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 an 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 disposed at intervals from each other in a 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 connecting line (12), and each fourth switch (M4) and the corresponding second switch (M2) are respectively connected to two ends of one touch connecting line (12).
3. The in-cell touch display panel according to claim 2, wherein the control terminals of the first switch (M1) and the second switch (M2) are connected to the first gate switch line (211), the first terminal of the first switch (M1) is connected to one touch connection line (12), the second terminal of the first switch (M1) is connected to the first input signal line (212), the first terminal of the second switch (M2) is connected to another touch connection line (12), and the second terminal of the second switch (M2) is connected to the 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 end of the third switch (M3) and the first end of the corresponding first switch (M1) are respectively connected to two ends of a touch connection line (12), the second end of the third switch (M3) is connected to the third input signal line (222), the first end of the fourth switch (M4) and the first end of the corresponding second switch (M2) are respectively connected to two ends of a touch connection line (12), and the second end of the fourth switch (M4) is connected to the fourth input signal line (223).
4. The in-cell touch display panel according to claim 3, further comprising a first conductive pad (31) and a second conductive pad (32);
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 inputted from the outside during 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 a second gray scale signal input from the outside during the testing phase.
5. The in-cell touch display panel according to claim 4, further comprising a third conductive pad (33) and an integrated circuit board (40);
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; 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 sensing 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 end of each touch connecting line (12), and common signals are input into the touch connecting lines (12) in the display stage.
6. The in-cell touch display panel according to claim 4, 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 to the first gate switch line (211), and the fourth conductive pad (34) receives a first gate switch signal inputted 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 sensing 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 to the second gate switch line (221), the fifth conductive pad (35) receives a second gate switch signal input from the outside during the detection stage, and the fifth conductive pad (35) is electrically connected to the integrated circuit board (40) during the display stage and receives a 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 a sensing phase, 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 a display phase;
the integrated circuit board (40) is connected with the first end of each touch control connecting line (12), and a first common signal is input to the first end of each touch control connecting line (12) in the display stage; the integrated circuit board (40) is connected to 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).
7. The in-cell touch display panel of claim 1, wherein the in-cell touch display panel is a shaped display panel comprising shaped areas (51) and non-shaped areas (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).
8. A driving method of an in-cell touch display panel, applied to the in-cell touch display panel of claim 2, the driving method comprising:
a detection phase, the first gate switch line (211) controlling the plurality of first switches (M1) and the plurality of second switches (M2) to be turned on, the second gate switch line (221) controlling the plurality of third switches (M3) and the plurality of fourth switches (M4) to be turned on; the first input signal line (212) and the third input signal line (222) input a first gray scale signal to two ends of the same touch connecting line (12), and the second input signal line (213) and the fourth input signal line (223) input a second gray scale signal to two ends of the same touch connecting line (12);
binding an integrated circuit board (40) to the in-cell touch display panel;
a display phase, the first gate switch line (211) controlling the plurality of first switches (M1) and the plurality of second switches (M2) to be closed, the second gate switch line (221) controlling the plurality of third switches (M3) and the plurality of fourth switches (M4) to be closed; the integrated circuit board (40) inputs a common signal to the touch connecting lines (12).
9. A driving method of an in-cell touch display panel, applied to the in-cell touch display panel of claim 2, the driving method comprising:
a detection phase, the first gate switch line (211) controlling the plurality of first switches (M1) and the plurality of second switches (M2) to be turned on, the second gate switch line (221) controlling the plurality of third switches (M3) and the plurality of fourth switches (M4) to be turned on; the first input signal line (212) and the third input signal line (222) input a first gray scale signal to two ends of the same touch connecting line (12), and the second input signal line (213) and the fourth input signal line (223) input a second gray scale signal to two ends of the same touch connecting line (12);
binding an integrated circuit board (40) to the in-cell touch display panel, such 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 phase, the first gate switch line (211) controlling the plurality of first switches (M1) and the plurality of second switches (M2) to be closed, the second gate switch line (221) controlling the plurality of third switches (M3) and the plurality of fourth switches (M4) to be open; 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).
10. A display device comprising the in-cell touch display panel according to any one of claims 1 to 7.
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| CN201910913631.5A CN110750170B (en) | 2019-09-25 | 2019-09-25 | Embedded touch display panel, driving method thereof and display device |
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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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