CN104020881B - Touch display panel and its driving method, display device - Google Patents
Touch display panel and its driving method, display device Download PDFInfo
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- CN104020881B CN104020881B CN201410234414.0A CN201410234414A CN104020881B CN 104020881 B CN104020881 B CN 104020881B CN 201410234414 A CN201410234414 A CN 201410234414A CN 104020881 B CN104020881 B CN 104020881B
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- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000001514 detection method Methods 0.000 claims abstract description 23
- 239000010409 thin film Substances 0.000 claims description 4
- 239000000758 substrate Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 12
- 230000011218 segmentation Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 6
- 239000004973 liquid crystal related substance Substances 0.000 description 5
- 230000007547 defect Effects 0.000 description 4
- 230000002411 adverse Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000000206 photolithography Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
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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
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- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Optics & Photonics (AREA)
- Position Input By Displaying (AREA)
Abstract
Embodiment of the invention discloses that a kind of touch display panel and its driving method, display device, it is related to display field, can solve the problem that due to the problem for showing that stage impedance is excessive that public electrode segmentation design is caused, it is to avoid (cross talk) etc. is bad, improves display effect.The touch display panel, including individual spaced strip shaped electric poles, the strip shaped electric poles are connected with each other by the public electrode in a line or multirow pixel and formed；The strip shaped electric poles are used to load common electric voltage in the display stage, play public electrode, in the touch control detection stage, the strip shaped electric poles are used to load touch driving voltage, play touch driving electrodes, in the display stage, the strip shaped electric poles are located at one end mutual conduction of the same side, while positioned at one end of opposite side also mutual conduction；Mutually disconnected between touch control detection stage, the strip shaped electric poles, as disconnected absolute electrode each other.
Description
Technical Field
The invention relates to the field of display, in particular to a touch display panel, a driving method thereof and a display device.
Background
Touch display screen develops rapidly, and the current mainstream product has all adopted external touch-sensitive screen (Add on) structural design, but traditional Add on touch-sensitive screen, and whole mechanism is thick and heavy, and the cost is higher, and along with the thin demand of consumer to the display, embedded (In Cell) LCD screen becomes an important direction of development In the touch display field.
In a liquid crystal panel having only a display function, the common electrode 10 generally covers the entire display area (a/a area) of the display panel, that is, the common electrode 10 is a whole transparent conductive layer, as shown in fig. 1. In the embedded liquid crystal panel, the touch driving electrode Tx and the common electrode are shared in a time-sharing driving manner, which requires that the common electrode must be divided into N independent electrodes 11(N is the total number of the touch driving electrodes) that are not connected to each other, and each independent electrode 11 is a touch driving electrode in the touch detection phase, as shown in fig. 2. Specifically, the individual electrodes 11 are applied with a common voltage in the display stage to function as common electrodes; in the touch phase, a touch driving voltage is applied to function as a touch driving electrode, and the touch driving electrode is matched with a touch sensing electrode (i.e., RX, not shown in the figure) to implement a touch detection function.
However, the inventor finds that the adverse effect of the common electrode division design is that, in the display stage, the impedance of the common electrode is increased to N times of that of a common display screen (a display screen with only a display function), and the delay of the common voltage signal Vcom is increased, which causes adverse effects such as crosstalk (crosstalk), and the like, and affects the display effect.
Disclosure of Invention
Embodiments of the present invention provide a touch display panel, a driving method thereof, and a display device, which can solve the problem of excessive impedance in a display stage caused by a common electrode dividing design, avoid poor crosstalk (cross talk) and the like, and improve a display effect.
The embodiment of the invention adopts the following technical scheme:
a touch display panel comprising: the array substrate comprises a plurality of strip electrodes which are arranged at intervals and formed by mutually connecting common electrodes in one or more rows of pixels; the strip-shaped electrodes are used for loading a common voltage to play a role of the common electrodes in a display stage, the strip-shaped electrodes are used for loading a touch driving voltage to play a role of the touch driving electrodes in a touch detection stage, and in the display stage, one ends of the strip-shaped electrodes positioned on the same side are mutually conducted, and meanwhile, one ends of the strip-shaped electrodes positioned on the other side are also mutually conducted; in the touch detection stage, the strip electrodes are disconnected with each other to form independent electrodes which are not connected with each other.
Specifically, one ends of the adjacent strip-shaped electrodes positioned on the same side are mutually conducted through a switch tube, and the other ends positioned on the other side are also mutually conducted through the switch tube; the switch tube is provided with a first pole, a second pole and a control end, the first pole and the second pole of the switch tube are respectively connected to one ends of two adjacent strip electrodes positioned on the same side, and the control end is connected to a control signal line.
Optionally, at least one of two ends of the strip electrode located at the edge of the touch display panel is connected to a common voltage signal line through a switch tube, a first pole of the switch tube is connected to the common voltage signal line, a second pole of the switch tube is connected to one end of the strip electrode, and a control end of the switch tube is connected to the control signal line.
Preferably, the touch display panel further includes: a common voltage output terminal disposed at an edge of the touch display panel; and the strip-shaped electrode on the touch display panel, which is closest to the side where the public voltage output end is located, is connected with the public voltage signal wire through the switch tube.
Preferably, the switching tube is disposed at an edge of the touch display panel.
Optionally, the switching tube is a triode or a thin film transistor.
An embodiment of the present invention further provides a display device, including: the touch display panel of any one of.
On the other hand, an embodiment of the present invention further provides a driving method for a touch display panel, where the touch display panel includes a plurality of strip electrodes arranged at intervals, and the strip electrodes are formed by connecting common electrodes in one or more rows of pixels, and the driving method includes: in the display stage, one ends of the strip electrodes positioned on the same side are mutually conducted, and one ends of the strip electrodes positioned on the other side are also mutually conducted, and then a common voltage is loaded; in the touch detection stage, the strip electrodes are mutually disconnected to form independent electrodes which are not mutually connected, and then touch driving signals are loaded line by line to complete the scanning of the touch signals.
On the other hand, the embodiment of the invention further provides a second driving method for a touch display panel, wherein on the touch display panel, one ends of adjacent strip-shaped electrodes located on the same side are mutually conducted through a switch tube, and meanwhile, one ends located on the other side are also mutually conducted through the switch tube; the switch tube is provided with a first pole, a second pole and a control end, the first pole and the second pole of the switch tube are respectively connected to one ends of two adjacent strip electrodes positioned on the same side, and the control end is connected to a control signal line. The driving method adopts a time-sharing driving mode to share the strip electrodes, and specifically comprises the following steps: in the display stage, a signal line is controlled to output a high level to open a switching tube, so that one ends of the strip electrodes positioned on the same side are mutually conducted, and the other ends of the strip electrodes positioned on the other side are also mutually conducted, and then a signal on a common voltage signal line is loaded on the strip electrodes; in the touch detection stage, the control signal line outputs a low level to turn off the switch tube, so that the strip electrodes are mutually disconnected to form independent electrodes which are not mutually communicated, and then touch driving signals are loaded line by line to finish scanning of the touch signals.
The embodiment of the invention provides a touch display panel, a driving method thereof and a display device, wherein in a display stage, one ends of strip electrodes which are designed in a dividing mode and are positioned on the same side are mutually conducted, and the other ends of the strip electrodes are also mutually conducted, namely the strip electrodes are equivalently connected in parallel to form a whole piece, so that when a public voltage is loaded to play a role of the public electrode, impedance can be reduced, the delay of a public voltage signal and the defects of crosstalk (cross talk) and the like caused by the delay can be avoided, and the display effect can be improved; in the touch detection stage, the strip electrodes are disconnected with each other, and the strip electrodes become independent electrodes which are not connected with each other, so that the touch driving electrodes function, and the scanning of touch signals is not influenced.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of a common electrode of a liquid crystal panel with only a display function in the prior art;
FIG. 2 is a schematic diagram of a common electrode dividing design in an embedded liquid crystal panel in the prior art;
fig. 3 is a first schematic structural diagram of a touch display panel according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a touch display panel according to an embodiment of the present invention;
FIG. 5 is a diagram illustrating loading of a common voltage during a display phase in the prior art.
Reference numerals
10-common electrode, 11-independent electrode, 12-strip electrode, 13-switch tube, 14-control signal line,
15-common voltage signal line, 16-lead.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Examples
An embodiment of the present invention provides a touch display panel, including: the array substrate comprises a plurality of strip electrodes which are arranged at intervals and formed by mutually connecting common electrodes in one or more rows of pixels; in the display stage, one ends of the strip electrodes positioned on the same side are mutually conducted, and the other ends of the strip electrodes positioned on the other side are also mutually conducted, and the strip electrodes are used for loading a common voltage to play a role of a common electrode; in the touch detection stage, the strip electrodes are disconnected with each other, the strip electrodes become independent electrodes which are not connected with each other, and the strip electrodes are used for loading touch driving voltage to play a role of the touch driving electrodes.
The strip-shaped electrodes may be formed by connecting common electrodes in a row of pixels with each other, or one strip-shaped electrode may correspond to a plurality of rows of pixels, that is, the strip-shaped electrodes are formed by connecting common electrodes in a plurality of rows of pixels with each other. In the touch detection stage, each strip electrode is a touch driving electrode (or a touch driving line).
The strip-shaped electrode in the embodiment of the invention is formed by dividing the original common electrode, and achieves the purpose of sharing the touch driving electrode Tx and the common electrode by adopting a time-sharing driving mode. During the preparation, a whole transparent conductive layer is deposited, and then a plurality of strip electrodes arranged at intervals are formed by photolithography (the specific pattern of the strip electrode is various, but is not relevant to the present invention, and is not described in detail here), which can be specifically referred to as fig. 2. The strip electrodes are respectively conducted at two ends in the display stage, so that the strip electrodes are connected into a whole piece, which is equivalent to a whole layer of transparent conducting layer, thus when a common voltage is loaded, the impedance can be reduced, the delay of a common voltage signal Vcom and the defects of cross talk and the like caused by the delay can be avoided, and the display effect is improved; in the touch detection stage, the strip electrodes are mutually disconnected to form independent electrodes which are not mutually connected and used for loading touch driving voltage, the scanning of touch signals is not influenced, and the strip electrodes serve as touch driving electrodes at the moment.
The driving method of the touch display panel is specifically as follows: in the display stage, one ends of the strip electrodes positioned on the same side are mutually conducted, and the other ends of the strip electrodes positioned on the other side are also mutually conducted, namely the strip electrodes are connected into a whole, and then a common voltage is loaded to realize the display function; in the touch detection stage, the strip electrodes are disconnected with each other, the strip electrodes become independent electrodes which are not connected with each other, and then touch driving voltage is loaded line by line to complete scanning of touch signals, so that the touch detection function is realized.
In the above technical solution, how to specifically implement mutual conduction of the strip electrodes in the display stage and mutual disconnection in the touch detection stage does not affect the implementation effect of the present invention, and therefore, the embodiment does not limit what specific implementation manner is adopted, and may be any implementation manner known to those skilled in the art. The technical solutions provided by the present invention are described in detail below by specific examples, and it should be apparent that the specific examples in the following description are only exemplary embodiments of the present invention and are not intended to limit the present invention.
As shown in fig. 3, as a first specific implementation manner of this embodiment, a plurality of strip electrodes 12 arranged at intervals are disposed on the touch display panel, and at least two ends of any strip electrode 12 are respectively connected to another adjacent strip electrode 12 through a switch tube 13, that is, one ends of the adjacent strip electrodes 12 located on the same side are mutually conducted through the switch tube 13, and meanwhile, one ends located on the other side are also mutually conducted through the switch tube 13. Specifically, the switching tubes 13 have a first pole, a second pole and a control end, the first pole and the second pole of the switching tubes 13 are respectively connected to one end of the two adjacent strip electrodes 12 located on the same side, and the control ends are both connected to a control signal line 14 (an EM signal line in fig. 3).
In the display stage, the switch tube 13 is turned on, the strip electrodes 12 are connected in parallel to form a whole piece, and the effect is the same as that of a whole transparent conductive layer as a common electrode as shown in fig. 1, so that the problem of overlarge impedance in the display stage caused by the common electrode dividing design in the prior art is solved, the defects of crosstalk (crosstalk) and the like are avoided, and the display effect is improved. It should be noted that, in this embodiment, the loading of the common voltage signal and the touch driving signal is completely the same as that in the prior art, and specifically, reference may be made to fig. 5 and the related description, and details are not repeated here.
As shown in fig. 4, the second embodiment of the present invention is different from the first embodiment in that the bar electrodes 12 at the edges of the touch display panel (the bar electrodes 12 closest to the lower edge in fig. 4) are connected to the common voltage signal line 15 (VCOM signal line in fig. 4) through the switch tubes 13 at two ends respectively. Specifically, the first pole of the switching tube 13 is connected to the common voltage signal line 15, the second pole is connected to the left end or the right end on the other side of the last strip electrode 12, and the control end is connected to the control signal line 14 (the EM signal line in fig. 4). Of course, the strip electrode 12 may be connected to the common voltage signal line 15 through the switching tube 13 at only one of the two ends.
In the display phase, the switch tube 13 is turned on, and the common voltage signal is applied to the strip electrode 12 at the edge of the panel (the strip electrode 12 closest to the lower edge of the panel in fig. 4) through the switch tube 13, and the common voltage signal is transmitted to the whole screen from the connected strip electrode 12. Therefore, in the embodiment shown in fig. 4, the touch driving signal and the common voltage, which were originally applied by sharing the same signal line, may now be applied only to the touch driving signal. Of course, it is preferable that the common voltage signal is applied in parallel with the application of the common voltage signal through the switch tube 13 in fig. 4, that is, in the display stage, the common voltage signal is applied to the strip electrodes 12 at the edge of the panel through the switch tube 13, and the common voltage signal is applied in the same way as the common voltage signal is applied.
Preferably, the switch tube is arranged at the edge of the touch display panel, so that the common voltage signal line 15 and the control signal line 14 can be conveniently wired at the edge of the panel, and wiring does not need to be introduced in a display area.
In a specific implementation manner, the touch display panel further includes: the common voltage output terminal is generally designed in a display driver IC (integrated circuit) or an FPC (Flexible printed circuit display cable), and the common voltage output terminal is located at an edge of a certain side of the touch display panel, such as a lower edge in fig. 4, and a strip electrode 12 closest to the side where the common voltage output terminal is located (i.e., a last strip electrode 12 located at the lower edge of the panel in fig. 4) is connected to a common voltage signal line 15 through a switch tube 13. At this time, the control signal line 14 is selected to be respectively wired at the left edge and the right edge, the switch tube 13 is arranged at the inner side of the control signal line 14 and the outer side of the strip-shaped electrode 12, the wiring is simple, convenient and reasonable, and the narrow frame is easier to realize.
In this embodiment, the switch tubes 13 are disposed between the adjacent strip electrodes 12, and the control signal lines 14 control the on and off of the switch tubes 13, so that the strip electrodes 12 are connected in parallel in the display stage and disconnected from each other in the touch stage. It can be seen that: in the structure shown in fig. 4, each switch tube 13 is arranged between any adjacent strip electrodes 12, and there is a conducting point between the adjacent strip electrodes 12 in the display stage, in this embodiment, it is required to arrange at least one switch tube 13 at each of the two ends of the strip electrodes 12, so that when the switch tubes 13 are turned on in the display stage, the two ends of the adjacent strip electrodes 12 are mutually conducted, and the adjacent strip electrodes can form a parallel connection relationship, thereby reducing the impedance of the common electrode in the display stage.
In fact, in addition to the switching tubes 13 at both ends, the switching tubes 13 may be disposed in other areas between the adjacent strip electrodes 12, for example, several switching tubes 13 may be disposed in the middle display area to connect the adjacent strip electrodes 12, so as to increase the conducting points and further reduce the impedance of the common electrode in the display stage, but in this way, new wiring is introduced into the display area to reduce the transmittance, so that the switching tubes 13 are disposed at both ends of any adjacent strip electrodes 12 as shown in fig. 3 to conduct, which is a preferred embodiment of the present embodiment.
In the above embodiment, the switch tubes 13 are disposed at two ends of adjacent strip electrodes 12 for connection, and the switch tubes 13 are controlled to be turned on and off by the control signal lines 14, so that the strip electrodes 12 are turned on in the display stage and turned off in the touch detection stage. The specific driving method of the circuit is briefly described as follows: in the display stage, the control signal line 14 outputs a high level to control all the switch tubes 13 to be turned on, one ends at the same side are mutually conducted, and the other ends at the other side are also mutually conducted, and then the signal on the common voltage signal line 15 is loaded on each strip electrode 12; in the touch detection stage, the control signal line 14 outputs a low level to control all the switch tubes 13 to be turned off, so that the strip electrodes 12 are mutually disconnected, the strip electrodes 12 become independent electrodes which are not mutually connected, meanwhile, the connection between the common voltage signal line 15 and the strip electrodes 12 is also disconnected, and then, the touch driving voltage is loaded line by line to complete the scanning of the touch signals. The signal on the control signal line 14 is used to control the switching tube 13 to be turned on in the display stage, and to be turned off in the touch detection stage, a new signal meeting the requirement may be generated by the circuit, or an existing signal, such as an existing display/touch switching control signal or an EM signal, may be used, and the EM signal is taken as an example in fig. 3 and 4 of this embodiment.
In this embodiment, in the display stage, the two ends of the adjacent strip electrodes 12 are conducted with each other, which is equivalent to that all the strip electrodes 12 are connected in parallel to form a whole common electrode, so as to solve the problem of too large impedance in the display stage caused by the common electrode dividing design, avoid the defects of crosstalk (cross talk) and the like, and improve the display effect.
Fig. 5 is a schematic diagram illustrating that a common voltage is applied during a display period when a time-sharing driving method is used to share the stripe electrodes in the prior art. In the prior art, the same number of leads 16 as the strip electrodes are arranged at the edge of the panel, when signals are loaded, the leads 16 are shared, and the touch driving signals and the common voltage are loaded through the leads 16 in different time periods, namely, in the display stage, the leads 16 are loaded with the same common voltage; in the touch detection stage, the lead lines 16 load the touch driving voltages line by line to complete the scanning of the touch signals.
If the number of the strip electrodes is N and the impedance of each strip electrode is R, the total impedance of the display stage is NR; for the embodiment of the present invention, all the strip electrodes 12 are connected in parallel in the display stage, and the total impedance is R/N, so that the impedance in the embodiment of the present invention becomes a factor N (N is the number of the strip electrodes 12) compared with the transmission of N common voltage signals Vcom disconnected from each other in the prior art.
Optionally, the switch tube is a triode or a thin film transistor, wherein the thin film transistor may be a depletion switch tube or an enhancement switch tube.
The touch display panel and the driving method thereof in the embodiment can solve the problem of too large impedance in a display stage caused by the common electrode segmentation design, avoid poor crosstalk (cross talk) and the like, and improve the display effect.
An embodiment of the present invention further provides a display device, including: the touch display panel of any one of. The display device has small impedance in the display stage, saves energy and electricity, and can obtain higher display quality. The display device may be: the display device comprises any product or component with a display function, such as a liquid crystal panel, electronic paper, a mobile phone, a tablet personal computer, a television, a display, a notebook computer, a digital photo frame, a navigator and the like.
For clarity of description, the first and second terms used in the present invention are not limited in number to the invention, but rather are used for illustrating a preferred embodiment, and similar variations or related extensions obvious to those skilled in the art from the disclosure of the present invention are within the scope of the present invention.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the apparatus embodiment, since it is substantially similar to the method embodiment, it is relatively simple to describe, and reference may be made to some descriptions of the method embodiment for relevant points.
The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in 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 (7)
1. A touch display panel comprising: the array substrate comprises a plurality of strip electrodes which are arranged at intervals and formed by mutually connecting common electrodes in one or more rows of pixels; the strip-shaped electrodes are used for loading common voltage to play a role of the common electrodes in a display stage, and are used for loading touch driving voltage to play a role of the touch driving electrodes in a touch detection stage,
in the display stage, one ends of the strip electrodes positioned on the same side are mutually conducted, and the other ends of the strip electrodes positioned on the other side are also mutually conducted; in the touch detection stage, the strip electrodes are disconnected with each other to form independent electrodes which are not connected with each other; wherein,
one ends of the adjacent strip-shaped electrodes positioned on the same side are mutually conducted through a switch tube, and the other ends of the adjacent strip-shaped electrodes positioned on the other side are also mutually conducted through the switch tube; the switch tube is provided with a first pole, a second pole and a control end, the first pole and the second pole of the switch tube are respectively connected to one end of two adjacent strip electrodes positioned on the same side, and the control end is connected to a control signal line;
at least one of two ends of the strip electrode is connected with a common voltage signal line through a switch tube, a first pole of the switch tube used for connecting the strip electrode positioned on the edge of the touch display panel with the common voltage signal line is connected to the common voltage signal line, a second pole of the switch tube is connected to one end of the strip electrode, and a control end of the switch tube is connected to the control signal line.
2. The touch display panel according to claim 1, further comprising: a common voltage output terminal disposed at an edge of the touch display panel;
and the strip-shaped electrode on the touch display panel, which is closest to the side where the public voltage output end is located, is connected with the public voltage signal wire through the switch tube.
3. The touch display panel according to any one of claims 1 to 2,
the switch tube is arranged at the edge of the touch display panel.
4. The touch display panel of claim 3,
the switch tube is a triode or a thin film transistor.
5. A display device, comprising: the touch display panel of any one of claims 1-4.
6. A driving method of a touch display panel, the touch display panel comprising a plurality of strip electrodes arranged at intervals, the strip electrodes being formed by interconnecting common electrodes in one or more rows of pixels, the driving method comprising:
in the display stage, one ends of the strip electrodes positioned on the same side are mutually conducted, and one ends of the strip electrodes positioned on the other side are also mutually conducted, and then a common voltage is loaded;
in the touch detection stage, the strip electrodes are mutually disconnected to form independent electrodes which are not mutually connected, and then touch driving signals are loaded line by line to complete the scanning of the touch signals.
7. A driving method of the touch display panel according to claim 1, wherein the driving method is implemented by sharing the strip electrodes in a time-sharing manner, and the driving method comprises:
in the display stage, a signal line is controlled to output a high level to open a switching tube, so that one ends of the strip electrodes positioned on the same side are mutually conducted, and the other ends of the strip electrodes positioned on the other side are also mutually conducted, and then a signal on a common voltage signal line is loaded on the strip electrodes;
in the touch detection stage, the control signal line outputs a low level to turn off the switch tube, so that the strip electrodes are mutually disconnected to form independent electrodes which are not mutually communicated, and then touch driving signals are loaded line by line to finish scanning of the touch signals.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410234414.0A CN104020881B (en) | 2014-05-29 | 2014-05-29 | Touch display panel and its driving method, display device |
| PCT/CN2014/085098 WO2015180270A1 (en) | 2014-05-29 | 2014-08-25 | Touch display panel and drive method therefor, and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410234414.0A CN104020881B (en) | 2014-05-29 | 2014-05-29 | Touch display panel and its driving method, display device |
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| CN104020881A CN104020881A (en) | 2014-09-03 |
| CN104020881B true CN104020881B (en) | 2017-06-16 |
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| CN104714695A (en) | 2015-03-31 | 2015-06-17 | 京东方科技集团股份有限公司 | Display substrate and drive method thereof and display device |
| CN104699347B (en) * | 2015-04-01 | 2017-05-31 | 上海中航光电子有限公司 | A kind of array base palte, display panel and electronic equipment |
| CN105070268B (en) * | 2015-09-23 | 2017-10-24 | 深圳市华星光电技术有限公司 | Reduce the method and apparatus of the leakage current of embedded touch LCD panel |
| CN106020556B (en) * | 2016-06-17 | 2019-04-05 | 京东方科技集团股份有限公司 | A kind of substrate, display panel, display device and its driving method |
| CN107894859B (en) * | 2016-10-04 | 2021-02-19 | 禾瑞亚科技股份有限公司 | Touch processing device, electronic system and touch processing method thereof |
| CN106502456B (en) | 2016-10-31 | 2019-07-16 | 厦门天马微电子有限公司 | Display panel and its driving method, display device |
| CN107229163B (en) * | 2017-06-28 | 2019-12-20 | 昆山龙腾光电有限公司 | Liquid crystal display device with switchable wide and narrow viewing angles and driving method |
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Also Published As
| Publication number | Publication date |
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| WO2015180270A1 (en) | 2015-12-03 |
| CN104020881A (en) | 2014-09-03 |
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