CN111045549A - Display panel, driving method thereof and display device - Google Patents
Display panel, driving method thereof and display device Download PDFInfo
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- CN111045549A CN111045549A CN201911191186.2A CN201911191186A CN111045549A CN 111045549 A CN111045549 A CN 111045549A CN 201911191186 A CN201911191186 A CN 201911191186A CN 111045549 A CN111045549 A CN 111045549A
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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
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
- G06F3/0418—Control or interface arrangements specially adapted for digitisers for error correction or compensation, e.g. based on parallax, calibration or alignment
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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
The invention discloses a display panel, a driving method thereof and a display device, and relates to the technical field of display, wherein a first edge of the display panel comprises a first sunken section, the display panel comprises a first electrode wire and a second electrode wire which are arranged in a non-display area, the first electrode wire is arranged around the first edge and the second edge, and the second electrode wire is positioned on one side of the first electrode wire, which is close to the first edge and the second edge; in the display stage, the first electrode wire, the second electrode wire and the touch electrode receive a common voltage signal; in a touch detection stage, a first electrode wire receives a common voltage signal, and a second electrode wire and a touch electrode receive a touch detection signal; in the capacitance detection stage, the first electrode wire receives a common voltage signal, and the second electrode wire and the touch electrode receive a capacitance detection signal; in the calibration stage, at least part of the touch electrodes in the second display area receive the calibration signal. The design is favorable for improving the phenomenon that the special-shaped display panel cannot normally touch and the phenomenon that the touch electrode is triggered by mistake.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a display panel, a driving method thereof, and a display device.
Background
With the development of science and technology, the manufacture of display panels is mature, and more display panels are widely applied to the daily life and work of people, so that great convenience is brought to the daily life and work of people. Conventional Display panels mainly include Liquid Crystal Display (LCD), Organic Light Emitting Display (OLED), plasma Display panel, and the like.
With the application of display technology in intelligent wearing and other portable electronic devices, the appearance of the display panel has diversified requirements, and a special-shaped display panel appears. Compared with the display panel with the conventional rectangular structure, the display area of the special-shaped display panel is in a non-rectangular structure. Generally, in order to implement a touch function of a display panel, a display area of the display panel is provided with a plurality of touch electrodes arranged in an array, for a display panel with a conventional rectangular structure, the number and the shape of the touch electrodes included in each row of touch electrodes are the same, and for a special-shaped display panel, the number of the touch electrodes included in each row of touch electrodes is different, so that capacitance values of different touch electrode rows are different in a standby state, which easily causes a random jumping point phenomenon and a screen freezing phenomenon of the touch electrodes to occur, and affects normal touch performance, wherein the random jumping point means that the touch electrodes generate a false triggering phenomenon when the display panel is in an unmanned touch state, for example, APP on a mobile phone is automatically turned on when the display panel is in an unmanned touch state; the screen freezing phenomenon means that the touch electrode does not react in the touch process, and normal touch cannot be performed.
Disclosure of Invention
In view of the above, the present invention provides a display panel, a driving method thereof and a display device, which are beneficial to improving the phenomenon that a special-shaped display panel cannot normally touch and the phenomenon that a touch electrode is triggered by mistake.
In a first aspect, the present application provides a display panel comprising a display area and a non-display area surrounding the display area, the display area comprising a first edge and a second edge adjacent to the first edge, the first edge comprising a first recessed segment, the first recessed segment being recessed towards an interior of the display area; the display area comprises a first display area and at least one second display area, and the second display area is positioned on at least one side of the first concave section along the first direction; the second display area is adjacent to the first display area along a second direction, and the first direction and the second direction are crossed; the display panel further includes:
the touch electrode rows extend along the first direction and are arranged along the second direction, the touch electrode rows comprise a first touch electrode row positioned in a first display area and a second touch electrode row positioned in a second display area, and the number of touch electrodes included in the second touch electrode row is smaller than that of the touch electrodes included in the first touch electrode row;
the display device comprises a first electrode wire and a second electrode wire which are arranged in a non-display area, wherein the first electrode wire is arranged around a first edge and a second edge, and the second electrode wire is positioned on one side of the first electrode wire close to the first edge and the second edge;
in a display stage, the first electrode wire, the second electrode wire and the touch electrode receive a common voltage signal; in a touch detection stage, the first electrode wire receives a common voltage signal, and the second electrode wire and the touch electrode receive a touch detection signal; in a capacitance detection stage, the first electrode wire receives a common voltage signal, and the second electrode wire and the touch electrode receive a capacitance detection signal; in the calibration stage, at least part of the touch electrodes positioned in the second display area receive calibration signals.
In a second aspect, the present application provides a driving method of a display panel, the driving method of the display panel includes a driving method of a display stage, a driving method of a touch detection stage, a driving method of a capacitance detection stage, and a driving method of a calibration stage, wherein,
in a display stage, sending a common voltage signal to the first electrode wire, the second electrode wire and the touch electrode;
in a touch detection stage, sending a common voltage signal to the first electrode wire, and sending a touch detection signal to the second electrode wire and the touch electrode;
in a capacitance detection stage, sending a common voltage signal to the first electrode wire, sending a capacitance detection signal to the second electrode wire and the touch electrode, judging whether the touch electrode with abnormal capacitance exists or not, and if so, entering a calibration stage; and in the calibration stage, a calibration signal is sent to the touch electrode with the abnormal capacitance.
In a third aspect, the present application further provides a display device including the display panel provided in the present application.
Compared with the prior art, the display panel, the driving method thereof and the display device provided by the invention at least realize the following beneficial effects:
in the display panel, the driving method thereof and the display device provided by the application, the display area of the display panel comprises a first edge and a second edge adjacent to the first edge, the first edge comprises a first concave section, and the first concave section is concave towards the inside of the display area. The display area comprises a first display area and at least one second display area adjacent to the first concave section along the first direction; the touch electrode rows comprise a first touch electrode row positioned in the first display area and a second touch electrode row positioned in the second display area, and the number of the touch electrodes contained in the second touch electrode row is smaller than that of the touch electrodes contained in the first touch electrode row. The method includes the steps that a first electrode wire and a second electrode wire are introduced into a non-display area, and the first electrode wire, the second electrode wire and a touch electrode all receive a common voltage signal in a display stage; in the touch detection stage, the first electrode line receives a common voltage signal, and the second electrode line and the touch electrode receive a touch detection signal. Particularly, a capacitance detection stage and a calibration stage are introduced, in the capacitance detection stage, the touch electrode receives a capacitance detection signal, whether the touch electrode with abnormal capacitance exists is judged, and if the touch electrode with abnormal capacitance exists, the calibration stage is started; and in the calibration stage, a calibration signal is sent to the touch electrode with the abnormal capacitance. The process of carrying out capacitance detection on the touch electrodes is introduced into the display panel, and the process of calibrating the touch electrodes with abnormal capacitance detection is carried out, so that the reference capacitance of each touch electrode on the display panel is kept consistent, the phenomena of disordered jumping points and screen freezing of the touch electrodes caused by different numbers of the touch electrodes contained in the first touch electrode row and the second touch electrode row are effectively improved, the phenomena of abnormal touch of the special-shaped display panel and false triggering of the touch electrodes are improved, and the touch performance of the display panel and the display device is favorably improved.
Of course, it is not necessary for any product in which the present invention is practiced to achieve all of the above-described technical effects simultaneously.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a schematic structural diagram of a display panel provided in the prior art;
fig. 2 is a top view of a display panel according to an embodiment of the present disclosure;
fig. 3 is a top view of another display panel provided in the embodiment of the present application;
fig. 4 is a top view of another display panel provided in the embodiment of the present application;
fig. 5 is a diagram illustrating a relative position relationship between touch traces and touch electrodes in the display panel according to the present embodiment;
FIG. 6 is a cross-sectional view along AA' of the display panel provided in the embodiment of FIG. 5;
fig. 7 is a flowchart illustrating a driving method of a display panel according to an embodiment of the present disclosure;
fig. 8 is a driving timing diagram of a display panel according to an embodiment of the present disclosure;
fig. 9 is a structural diagram of a display device according to an embodiment of the present application.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
Fig. 1 is a schematic structural diagram of a display panel in the prior art, in which the display panel 300 includes a plurality of touch electrode rows, each of the touch electrode rows includes a first touch electrode row 301 and a second touch electrode row 302, and the number of touch electrodes 303 included in the first touch electrode row 301 is smaller than the number of touch electrodes 303 included in the second touch electrode row 302. Actual test data shows that in a standby state, the capacitance value of the touch electrode 303 in the first touch electrode row 301 is greater than that of the touch electrode 303 in the second touch electrode row 302 at both normal temperature and low temperature, and the existence of such capacitance difference easily causes a display panel to have a random jumping point phenomenon and a screen freezing phenomenon, which affects normal touch performance, wherein the random jumping point means that the touch electrode has a false triggering phenomenon under the condition that the display panel is not touched by a person, for example, APP on a mobile phone is automatically clicked when the APP is touched by no person; the screen freezing phenomenon means that the touch electrode does not react and normal touch cannot be performed in the touch process.
In view of the above, the present invention provides a display panel, a driving method thereof and a display device, which are beneficial to improving the phenomenon that a special-shaped display panel cannot normally touch and the phenomenon that a touch electrode is triggered by mistake.
The following detailed description is to be read in connection with the drawings and the detailed description.
Fig. 2 is a top view of a display panel provided in an embodiment of the present application, where the display panel 100 provided in the embodiment includes a display area 10 and a non-display area 20 surrounding the display area 10, the display area 10 includes a first edge 11 and a second edge 12 adjacent to the first edge 11, the first edge 11 includes a first concave section 21, and the first concave section 21 is concave toward the inside of the display area 10; the display area 10 includes a first display area 31 and at least one second display area 32, the second display area 32 being located at least one side of the first recess section 21 in the first direction; the second display area 32 is adjacent to the first display area 31 along the second direction, and the first direction and the second direction are crossed; the display panel 100 further includes:
a plurality of touch electrode rows 40 extending along a first direction and arranged along a second direction, wherein the touch electrode rows 40 include a first touch electrode row 41 located in the first display area 31 and a second touch electrode row 42 located in the second display area 32, and the number of touch electrodes 50 included in the second touch electrode row 42 is smaller than the number of touch electrodes 50 included in the first touch electrode row 41;
in the display phase, the first electrode lines 51, the second electrode lines 52 and the touch electrodes 50 receive a common voltage signal; in the touch detection phase, the first electrode lines 51 receive the common voltage signal, and the second electrode lines 52 and the touch electrodes 50 receive the touch detection signal; in the capacitance detection stage, the first electrode line 51 receives a common voltage signal, and the second electrode line 52 and the touch electrode 50 receive a capacitance detection signal; in the calibration stage, at least a portion of the touch electrodes 50 located in the second display area 32 receive the calibration signal.
It should be noted that, in the embodiment shown in fig. 2, only the case that the first edge 11 of the display panel 100 includes one first concave section 21 is shown, in some other embodiments of the present application, the first edge 11 may further include two or more first concave sections 21, the present application does not limit the number of the first concave sections 21, and the present application only takes the case that the first edge 11 includes one first concave section 21 as an example for description. In fig. 2, line segments with different thicknesses are used to distinguish the first electrode lines 51 from the second electrode lines 52, but do not represent actual line widths of the first electrode lines 51 and the second electrode lines 52. In addition, fig. 2 only shows that the first concave section 21 is located at the middle position of the first edge 11, in some other embodiments of the present application, the first concave section 21 may also be located at the edge position of the first edge 11, for example, please refer to fig. 3, fig. 3 shows another top view of the display panel 100 provided in the embodiments of the present application, the present application does not specifically limit the position of the first concave section 21, and the following description only takes the structure shown in fig. 2 as an example.
In particular, with continued reference to fig. 2, the display area 10 of the display panel 100 includes a first edge 11 and a second edge 12 adjacent to the first edge 11, the first edge 11 includes a first recessed segment 21, and the first recessed segment 21 is recessed toward the interior of the display area 10 such that the display area 10 exhibits a non-rectangular shaped configuration. The display area 10 includes a first display area 31 and at least one second display area 32 adjacent to the first recess section 21 in the first direction; the touch electrode row 40 includes a first touch electrode row 41 located in the first display area 31 and a second touch electrode row 42 located in the second display area 32, and due to the existence of the first recessed section 21, the number of touch electrodes 50 included in the second touch electrode row 42 is smaller than the number of touch electrodes 50 included in the first touch electrode row 41. In addition, in the present application, a first electrode line 51 and a second electrode line 52 are introduced into the non-display area 20, and in the display stage, the first electrode line 51, the second electrode line 52 and the touch electrode 50 all receive a common voltage signal; in the touch detection phase, the first electrode lines 51 receive the common voltage signal, and the second electrode lines 52 and the touch electrodes 50 receive the touch detection signal. Particularly, the method further introduces a capacitance detection stage and a calibration stage, in the capacitance detection stage, the touch electrode 50 receives a capacitance detection signal, judges whether the touch electrode 50 with abnormal capacitance exists, and if yes, enters the calibration stage; in the calibration phase, a calibration signal is sent to the touch electrode 50 with the abnormal capacitance. The process of capacitance detection of the touch electrodes 50 and the process of calibration of the touch electrodes 50 with abnormal capacitance detection are introduced into the display panel 100, so that the reference capacitance of each touch electrode 50 on the display panel 100 is kept consistent, the phenomena of random jumping and screen freezing of the touch electrodes 50 caused by different numbers of the touch electrodes 50 contained in the first touch electrode row 41 and the second touch electrode row 42 are effectively improved, the phenomena of abnormal touch of the special-shaped display panel 100 and false triggering of the touch electrodes 50 are improved, and further the touch performance of the display panel 100 and the display device is favorably improved.
In the present application, the first electrode lines 51 introduced into the non-display area 20 of the display panel 100 are disposed around the first edge 11 and the second edge 12 of the display area 10, in the display stage, the touch detection stage and the capacitance detection stage, the first electrode lines 51 are all used for receiving the common voltage signal, the common voltage signal is a constant level signal, when the first electrode lines 51 receiving the constant level signal are disposed on the periphery of the display area 10, the shielding of the interference signal on the periphery of the display panel 100 is facilitated, and the influence of the interference signal on the circuit in the display area 10 is avoided.
In the display stage, the touch electrode 50 in the present application is multiplexed as a common electrode to receive a common voltage signal; in the touch detection stage, the touch electrode 50 receives a touch detection signal. In this way, the touch electrode 50 and the common electrode are multiplexed, and different film layer structures do not need to be respectively arranged on the display panel 100 for the touch electrode 50 and the common electrode, so that the film layer structure of the display panel 100 is simplified, and the requirement for thinning the display panel 100 is met.
Fig. 2 of the present embodiment only illustrates technical features of the display panel 100 related to the technical solution of the present embodiment, and it can be understood that the structure of the display panel 100 not only includes the illustration in the figure, but also includes other technical features known in the prior art for implementing a display function, such as a pixel unit located in a display region, a gate driving unit (not shown) located in a non-display region, and the like, which are not illustrated and described herein again. The shape of the touch electrode in this embodiment is only schematically illustrated as a square, and in particular, the shape of the touch electrode may be any other shape. The number and size of the touch electrodes in this embodiment are also only schematic illustrations, and in specific implementation, the number of the touch electrodes is not limited to the number in the drawings, and the size of the touch electrodes may also be set according to actual requirements.
In some optional embodiments, the first electrode lines 51, the second electrode lines 52 and the touch electrodes 50 are located on the same film layer. Therefore, the first electrode line 51, the second electrode line 52 and the touch electrode 50 in the present application can be manufactured simultaneously by using the same manufacturing process, and different manufacturing processes and film layer structures do not need to be introduced into the first electrode line 51, the second electrode line 52 and the touch electrode 50 respectively, so that the generation process of the display panel 100 is simplified, and the production efficiency of the display panel 100 is improved.
Alternatively, referring to fig. 2, the width of the space between the first electrode lines 51 and the second electrode lines 52 along the direction parallel to the plane of the display panel 100 is D0, and D0 is greater than 100 μm.
Specifically, with continued reference to fig. 2, since the signals received on the first electrode lines 51 and the second electrode lines 52 are different in the touch detection phase and the capacitance detection phase, the first electrode lines 51 are used for receiving the common voltage signal in both the touch detection phase and the capacitance detection phase; in the touch phase, the second electrode lines 52 are used for receiving a touch detection signal; in the capacitance detection phase, the second electrode lines 52 are used for receiving capacitance detection signals. When the distance between the first electrode lines 51 and the second electrode lines 52 is small, a large coupling capacitance is formed between the first electrode lines 51 and the second electrode lines 52 in the touch detection stage and the capacitance detection stage, which affects the accuracy of touch detection and capacitance detection, and may cause the display panel to have a phenomenon of stray jumping and a phenomenon of freeze screen. And this application sets up interval D0 between first electrode line 51 and the second electrode line 52 to be greater than when 100 mu m, make the interval increase between first electrode line 51 and the second electrode line 52, thereby make the coupling capacitance between first electrode line 51 and the second electrode line 52 reduce, thereby reduced and caused the influence to second electrode line 52 and touch-control electrode 50's signal at touch-control detection stage and electric capacity detection stage signal on first electrode line 51, consequently, be favorable to promoting touch-control detection's accuracy and electric capacity detection's accuracy, be favorable to reducing the display panel simultaneously and appear the possibility of the spurious jump point and freeze-screen phenomenon.
Optionally, in the display panel 100 provided in the embodiment of the present application, the line width of the first electrode lines 51 is D1, and D1 < 50 μm.
Specifically, with reference to fig. 2, the line width of the first electrode line 51 is set to be smaller, specifically set to be smaller than 50 μm, and in the display stage, the touch detection stage and the capacitance detection stage, the common voltage signal can be reliably received, so that the influence of the external electrical signal on the circuit in the display panel 100 is avoided, and meanwhile, the width of the frame occupied by the first electrode line 51 can be reduced, thereby being beneficial to realizing the narrow frame design of the display panel 100.
In some alternative embodiments, please refer to fig. 4, fig. 4 is a top view of a display panel 100 provided in an embodiment of the present application, in which the non-display area 20 includes a binding area 22 and a first bezel area 23 disposed opposite to the binding area 22 in the display panel 100 provided in the embodiment; the second electrode line 52 includes a sub-line segment 521 located in the first frame area 23, and a line width of the sub-line segment 521 is greater than a line width of the first electrode line 51.
In particular, fig. 4 shows an embodiment in which the second electrode line 52 includes a sub-line segment 521 having a larger line segment. The line width of the sub-line segment 521 located in the first frame area 23 in the second electrode line 52 is greater than the line width of the first electrode line 51, generally, the line structure arranged in the first frame area 23 opposite to the binding area 22 on the display panel 100 is less, and on the premise of realizing a narrow frame, the first frame area 23 has a certain space for arranging the sub-line segment 521 with a greater line width. Because in the display stage, the first electrode line 51 and the second electrode line 52 both receive the common voltage signal, when the width of the sub-line segment 521 in the first frame area 23 in the second electrode line 52 is set to be wider, the first electrode line 51 and the second electrode line 52 jointly play a role in shielding, which is more favorable for improving the shielding effect of the first electrode line 51 and the second electrode line 52 on the external electric signals in the display stage, and avoiding the external electric signals from interfering the normal display of the display panel 100, thereby being more favorable for improving the display reliability of the display panel 100.
Optionally, fig. 5 is a diagram illustrating a relative position relationship between the touch trace 60 and the touch electrode 50 in the display panel 100 provided in the embodiment of the present application, fig. 6 is a cross-sectional view of the display panel 100 provided in the embodiment of fig. 5 along AA', the display panel 100 further includes a plurality of touch traces 60 and a plurality of dummy traces 61, and the touch traces 60 and the dummy traces 61 are located on the same film layer; the touch electrodes 50 are electrically connected to the touch traces 60 in a one-to-one correspondence, and each of the dummy traces 61 is electrically connected to the second electrode lines 52.
Specifically, to realize the signal interaction between the touch electrode 50 and the driving chip 90 on the display panel 100, the touch trace 60 is usually introduced on the display panel 100 to connect the touch electrode 50 and the driving chip 90, in this embodiment, the touch electrode 50 and the touch trace 60 are electrically connected in a one-to-one correspondence. When one touch trace 60 is introduced to each touch electrode 50, the touch traces 60 cannot be uniformly arranged in the display area 10 of the display panel 100, which may cause the display panel 100 to have a non-uniform load. Therefore, the dummy traces 61 are introduced to the display panel 100, the dummy traces 61 and the touch traces 60 are located on the same film layer and are manufactured in the same process, and after the dummy traces 61 are introduced to the display panel 100, the display panel 100 is favorable for achieving impedance matching and improving load uniformity. In addition, after the dummy trace 61 introduced in the display panel 100 is electrically connected to the second electrode line 52, the dummy electrode and the second electrode line 52 are at the same potential, and receive the same electrical signal. For example, in the touch detection stage, the dummy trace 61 and the second electrode line 52 both receive a touch detection signal, and the touch trace 60 and the touch electrode 50 also both receive a touch detection signal; in the display stage, the dummy trace 61 and the touch trace 60 both receive a common voltage signal; therefore, the equipotential between the dummy trace 61 and the touch trace 60 can be ensured, and the signal coupling between the touch trace 60 and the dummy trace 61 is avoided, that is, the interference of the dummy trace 61 on the signal on the touch trace 60 is avoided, so that the touch reliability and the display reliability of the display panel 100 are improved. It should be noted that fig. 5 distinguishes the touch trace 60 and the dummy trace 61 by the thickness of the line, and does not represent the actual line width, and in fact, the line widths of the touch trace 60 and the dummy trace 61 may be set to be equal.
Based on the same inventive concept, the present application further provides a driving method of a display panel 100, and fig. 7 is a flowchart of the driving method of the display panel 100 according to the embodiment of the present application, the driving method is used for driving the display panel 100 provided by the present application, please refer to fig. 2 and fig. 7, the driving method of the display panel 100 includes a driving method in a display stage, a driving method in a touch detection stage, a driving method in a capacitance detection stage, and a driving method in a calibration stage, wherein,
in the display stage, a common voltage signal is sent to the first electrode line 51, the second electrode line 52 and the touch electrode 50;
in the touch detection stage, a common voltage signal is sent to the first electrode line 51, and a touch detection signal is sent to the second electrode line 52 and the touch electrode 50;
in the capacitance detection stage, a common voltage signal is sent to the first electrode line 51, a capacitance detection signal is sent to the second electrode line 52 and the touch electrode 50, whether the touch electrode 50 with abnormal capacitance exists or not is judged, and if yes, the calibration stage is started; in the calibration phase, a calibration signal is sent to the touch electrode 50 with the abnormal capacitance.
It should be noted that, in the flowchart of the display stage, the touch detection stage, and the capacitance detection stage shown in fig. 7, there is no fixed sequence among the display stage, the touch detection stage, and the capacitance detection stage, and the sequence of the display stage, the touch detection stage, and the capacitance detection stage can be flexibly set according to actual requirements.
Specifically, referring to fig. 2, fig. 7 and fig. 8, fig. 8 is a driving timing diagram of the display panel 100 according to the embodiment of the present disclosure, in which T1 represents a capacitance detection phase, T2 represents a touch detection phase, and T3 represents a display phase; VCOM1 represents the signal received by the first electrode line 51 during the display phase, the touch detection phase and the capacitance detection phase; VCOM2 represents the signal received by the second electrode line 52 and the touch electrode 50 during the display phase, the touch detection phase and the capacitance detection phase. In the driving method of the display panel 100 provided in the embodiment of the present application, in addition to the display stage and the touch detection stage, a capacitance detection stage is further introduced to detect each touch electrode 50 on the display panel 100. Since the display area 10 of the display panel 100 is in the special-shaped structure, the touch electrode row 40 includes the first touch electrode row 41 located in the first display area 31 and the second touch electrode row 42 located in the second display area 32, and due to the existence of the first recessed section 21, the number of the touch electrodes 50 included in the second touch electrode row 42 is smaller than the number of the touch electrodes 50 included in the first touch electrode row 41, so that in the standby state, the capacitance value of the touch electrodes 50 in the second touch electrode row 42 is larger than the capacitance value of the touch electrodes 50 in the first touch electrode row 41, and such capacitance difference easily causes the touch electrodes 50 to generate the phenomena of random jumping and screen freezing, which affects the normal touch performance. In the driving method of the display panel 100 provided by the present application, a capacitance detection stage is introduced, in the capacitance detection stage, the touch electrode 50 receives a capacitance detection signal, and determines whether the touch electrode 50 with abnormal capacitance exists in the display panel 100 (usually, the touch electrode 50 with abnormal capacitance appears in the second touch electrode row 42), and if so, enters a calibration stage; in the calibration phase, a calibration signal is sent to the touch electrode 50 with the abnormal capacitance. The process of capacitance detection of the touch electrodes 50 and the process of calibration of the touch electrodes 50 with abnormal capacitance detection are introduced into the display panel 100, so that the reference capacitance of each touch electrode 50 on the display panel 100 is kept consistent, the phenomena of random jumping and screen freezing of the touch electrodes 50 caused by different numbers of the touch electrodes 50 contained in the first touch electrode row 41 and the second touch electrode row 42 are effectively improved, the phenomena of abnormal touch of the special-shaped display panel 100 and false triggering of the touch electrodes 50 are improved, and further the touch performance of the display panel 100 is favorably improved.
It should be noted that the capacitance detection process introduced in the present application does not affect the time of the display stage in the display panel 100, but can change a part of the touch detection stage in the prior art into the capacitance detection stage, so as not to increase the normal scanning period of the display panel 100.
Optionally, in the driving method of the display panel 100 provided in the embodiment of the present application, in the capacitance detection stage, it is determined whether there is the touch electrode 50 with the abnormal capacitance, specifically: the capacitance value of each touch electrode 50 is obtained, the capacitance value of each touch electrode 50 is compared with a preset capacitance value, and if the capacitance value of the touch electrode 50 is greater than the preset capacitance value, the touch electrode 50 is the touch electrode 50 with abnormal capacitance.
Specifically, the process of detecting the capacitance of the touch electrode 50 can be performed by the driving chip 90, the driving chip 90 sends a capacitance detection signal to the touch electrode 50 through the touch trace 60, and obtains the capacitance value of each touch electrode 50 through a signal fed back by the touch electrode 50, compares the capacitance value of each touch electrode 50 with a preset capacitance value, and determines that the touch electrode 50 is the touch electrode 50 if the capacitance value of the touch electrode 50 is greater than the preset capacitance value. Thus, even if the capacitance detection process is introduced, the process of capacitance detection can be realized only by changing the driving program on the display panel 100 without adding a new module structure on the display panel 100.
Optionally, in the driving method of the display panel 100 provided in the embodiment of the present application, in the calibration stage, a calibration signal is sent to the touch electrode 50 with the abnormal capacitance, specifically:
and sending a capacitance calibration signal to the touch electrode 50 with the abnormal capacitance, and calibrating the capacitance value of the touch electrode 50 with the abnormal capacitance to make the capacitance value of each touch electrode 50 equal to the preset capacitance value.
Specifically, after the touch electrode 50 with the abnormal capacitance is found, the capacitance value of the touch electrode 50 with the abnormal capacitance is calibrated, so that the capacitance value of each touch electrode 50 on the display panel 100 is equal to the preset capacitance value. Through the calibration process, the capacitance values of the touch electrodes 50 are all set to be the same, so that the phenomena of disordered jumping and screen freezing of the touch electrodes 50 caused by the capacitance value difference of the touch electrodes 50 are avoided, and the touch performance of the display panel 100 is improved. It should be noted that, the calibration process for the touch electrode 50 with abnormal capacitance can also be executed by the driving chip 90 on the display panel 100, and even if the calibration process is introduced, the calibration process can be implemented only by changing the driving program on the display panel 100 without adding a new module structure on the display panel 100.
Optionally, in the driving method of the display panel 100 provided in the embodiment of the present application, for example, please refer to fig. 8, in the same time period, the display phase T2, the capacitance detection phase T2, and the touch detection phase T3 are performed alternately. So, in same time cycle, integrated display phase, electric capacity detection stage and touch-control detection stage, all introduce electric capacity detection stage in every time cycle, detect display panel 100 last touch-control electrode 50's electric capacity, after discovering the unusual touch-control electrode 50 of electric capacity, in time calibrate the unusual touch-control electrode 50 of electric capacity, thereby make when taking place the touch, the capacitance value that each touch-control electrode 50 was based on display panel 100 is all the same, thereby be favorable to improving display panel 100 and appear in disorder jumping point phenomenon and freeze the screen phenomenon. It should be noted that, the timing diagram shown in fig. 8 only illustrates an execution sequence of the display phase T2, the capacitance detection phase T2, and the touch detection phase T3, in some other embodiments of the present application, the execution sequence of the display phase T2, the capacitance detection phase T2, and the touch detection phase T3 may also be embodied in other embodiments, which is not specifically limited in this application.
Based on the same inventive concept, the present application further provides a display device, and fig. 9 is a structural diagram of a display device 200 provided in an embodiment of the present application, and referring to fig. 9, the display device 200 includes a display panel 100, and the display panel is the display panel 100 provided in the embodiment of the present application. It should be noted that, for the embodiments of the display device 200 provided in the embodiments of the present application, reference may be made to the embodiments of the display panel 100, and repeated descriptions are omitted. The display device 200 provided by the present application may be: any product or component with practical functions such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator and the like.
When the display panel 100 includes the first recess section 21, the display device 200 may further include a camera and/or an optical sensor, which are located in a space formed by the first recess section. Specifically, the camera and/or the optical sensor are/is arranged in the space formed by the first sunken section, so that the requirement of consumers on the display device in social development is met, and the practicability of the display device is improved. In addition, set up camera and/or optical sensor in the space that first sunken section formed, still be favorable to realizing the display effect of full screen, be favorable to display device's high integration.
In summary, the display panel, the driving method thereof and the display device provided by the invention at least achieve the following beneficial effects:
in the display panel, the driving method thereof and the display device provided by the application, the display area of the display panel comprises a first edge and a second edge adjacent to the first edge, the first edge comprises a first concave section, and the first concave section is concave towards the inside of the display area. The display area comprises a first display area and at least one second display area adjacent to the first concave section along the first direction; the touch electrode rows comprise a first touch electrode row positioned in the first display area and a second touch electrode row positioned in the second display area, and the number of the touch electrodes contained in the second touch electrode row is smaller than that of the touch electrodes contained in the first touch electrode row. The method includes the steps that a first electrode wire and a second electrode wire are introduced into a non-display area, and the first electrode wire, the second electrode wire and a touch electrode all receive a common voltage signal in a display stage; in the touch detection stage, the first electrode line receives a common voltage signal, and the second electrode line and the touch electrode receive a touch detection signal. Particularly, a capacitance detection stage and a calibration stage are introduced, in the capacitance detection stage, the touch electrode receives a capacitance detection signal, whether the touch electrode with abnormal capacitance exists is judged, and if the touch electrode with abnormal capacitance exists, the calibration stage is started; and in the calibration stage, a calibration signal is sent to the touch electrode with the abnormal capacitance. The process of carrying out capacitance detection on the touch electrodes is introduced into the display panel, and the process of calibrating the touch electrodes with abnormal capacitance detection is carried out, so that the reference capacitance of each touch electrode on the display panel is kept consistent, the phenomena of disordered jumping points and screen freezing of the touch electrodes caused by different numbers of the touch electrodes contained in the first touch electrode row and the second touch electrode row are effectively improved, the phenomena of abnormal touch of the special-shaped display panel and false triggering of the touch electrodes are improved, and the touch performance of the display panel and the display device is favorably improved.
Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (11)
1. A display panel comprising a display area and a non-display area surrounding the display area, the display area comprising a first edge and a second edge adjacent to the first edge, the first edge comprising a first recessed section, the first recessed section being recessed toward an interior of the display area; the display area comprises a first display area and at least one second display area, and the second display area is positioned on at least one side of the first concave section along the first direction; the second display area is adjacent to the first display area along a second direction, and the first direction and the second direction are crossed; the display panel further includes:
the touch electrode rows extend along the first direction and are arranged along the second direction, the touch electrode rows comprise a first touch electrode row positioned in a first display area and a second touch electrode row positioned in a second display area, and the number of touch electrodes included in the second touch electrode row is smaller than that of the touch electrodes included in the first touch electrode row;
the display device comprises a first electrode wire and a second electrode wire which are arranged in a non-display area, wherein the first electrode wire is arranged around a first edge and a second edge, and the second electrode wire is positioned on one side of the first electrode wire close to the first edge and the second edge;
in a display stage, the first electrode wire, the second electrode wire and the touch electrode receive a common voltage signal; in a touch detection stage, the first electrode wire receives a common voltage signal, and the second electrode wire and the touch electrode receive a touch detection signal; in a capacitance detection stage, the first electrode wire receives a common voltage signal, and the second electrode wire and the touch electrode receive a capacitance detection signal; in the calibration stage, at least part of the touch electrodes positioned in the second display area receive calibration signals.
2. The display panel according to claim 1, wherein the first electrode lines, the second electrode lines and the touch electrodes are located on the same film layer.
3. The display panel according to claim 1, wherein the first electrode lines and the second electrode lines have a spacing width of D0, D0 > 100 μm, in a direction parallel to the plane of the display panel.
4. The display panel according to claim 1, wherein the line width of the first electrode lines is D1, D1 < 50 μm.
5. The display panel according to claim 1, wherein the non-display region includes a binding region and a first bezel region disposed opposite to the binding region;
the second electrode wire comprises a sub-line segment positioned in the first frame area, and the line width of the sub-line segment is greater than that of the first electrode wire.
6. The display panel according to claim 1, wherein the display panel further comprises a plurality of touch traces and a plurality of dummy traces, the touch traces and the dummy traces being located on a same film layer;
the touch electrodes are electrically connected with the touch wires in a one-to-one correspondence mode, and the dummy wires are electrically connected with the second electrode wires respectively.
7. A driving method of the display panel according to any one of claims 1 to 6, wherein the driving method of the display panel comprises a driving method of a display stage, a driving method of a touch detection stage, a driving method of a capacitance detection stage, and a driving method of a calibration stage,
in a display stage, sending a common voltage signal to the first electrode wire, the second electrode wire and the touch electrode;
in a touch detection stage, sending a common voltage signal to the first electrode wire, and sending a touch detection signal to the second electrode wire and the touch electrode;
in a capacitance detection stage, sending a common voltage signal to the first electrode wire, sending a capacitance detection signal to the second electrode wire and the touch electrode, judging whether the touch electrode with abnormal capacitance exists or not, and if so, entering a calibration stage; and in the calibration stage, a calibration signal is sent to the touch electrode with the abnormal capacitance.
8. The method for driving a display panel according to claim 7, wherein in the capacitance detection stage, determining whether there is a touch electrode with abnormal capacitance includes:
and obtaining a capacitance value of each touch electrode, comparing the capacitance value of each touch electrode with a preset capacitance value, and if the capacitance value of the touch electrode is greater than the preset capacitance value, determining that the touch electrode is a touch electrode with abnormal capacitance.
9. The method for driving a display panel according to claim 8, wherein in the calibration stage, the calibration signal is sent to the touch electrode with the abnormal capacitance, specifically:
and sending a capacitance calibration signal to the touch electrodes with abnormal capacitance, and calibrating the capacitance value of the touch electrodes with abnormal capacitance to enable the capacitance value of each touch electrode to be equal to the preset capacitance value.
10. The method according to claim 7, wherein the display phase, the capacitance detection phase and the touch detection phase are performed alternately in the same time period.
11. A display device comprising the display panel according to any one of claims 1 to 6.
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