CN111045549B - Display panel, driving method thereof and display device - Google Patents
Display panel, driving method thereof and display device Download PDFInfo
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- CN111045549B CN111045549B CN201911191186.2A CN201911191186A CN111045549B CN 111045549 B CN111045549 B CN 111045549B CN 201911191186 A CN201911191186 A CN 201911191186A CN 111045549 B CN111045549 B CN 111045549B
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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.A first edge of the display panel comprises a first concave 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 at one side of the first electrode wire 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 the 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 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 phase, the touch electrode at least partially positioned in the second display area receives a calibration signal. The design is favorable for improving the phenomenon that the abnormal display panel cannot be touched normally and the false triggering phenomenon of the touch electrode.
Description
Technical Field
The present invention relates to the field of display technologies, and more particularly, to a display panel, a driving method thereof, and a display device.
Background
Along with the development of scientific technology, the manufacturing of the display panel also tends to be mature, and more display panels are widely applied to daily life and work of people, so that great convenience is brought to the daily life and work of people. The existing display panels mainly include a liquid crystal display panel (Liquid Crystal Display, LCD), an organic light emitting display panel (Organic Light Emitting Diode, OLED), a plasma display panel, and the like.
With the application of display technology in intelligent wearing and other portable electronic devices, diversified requirements are placed on the appearance of a display panel, and then a special-shaped display panel appears. Compared with the display panel with a conventional rectangular structure, the display area of the special-shaped display panel is in a non-rectangular structure. In general, in order to realize 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 shape of touch electrodes contained in each row of touch electrodes are the same, and for a special-shaped display panel, the number of touch electrodes contained in each row of touch electrodes is different, so that in a standby state, capacitance values of different touch electrode rows are different, and therefore, the phenomenon of disordered jump points of the touch electrodes and the phenomenon of frozen screen are easily caused, and normal touch performance is influenced, wherein the disordered jump points refer to the fact that the touch electrodes are wrongly triggered under the condition of unmanned touch of the display panel, for example, APP on a mobile phone is automatically turned on when unmanned touch is performed; 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 this, the present invention provides a display panel, a driving method thereof and a display device, which are beneficial to improving the phenomenon that the abnormal display panel cannot be touched normally and the phenomenon that the touch electrode is triggered by mistake.
In a first aspect, the present application provides a display panel comprising a display region and a non-display region surrounding the display region, the display region 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 region; 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 intersected; 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 contained in the second touch electrode row is smaller than that of touch electrodes contained in the first touch electrode row;
a first electrode line and a second electrode line disposed in the non-display region, the first electrode line disposed around the first edge and the second edge, the second electrode line being located at a side of the first electrode line near the first edge and the second edge;
in a display stage, the first electrode line, the second electrode line and the touch electrode receive a common voltage signal; in the 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 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 electrode positioned in the second display area receives a calibration signal.
In a second aspect, the present application provides a driving method of a display panel, the driving method of the display panel including 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, a common voltage signal is sent to the first electrode wire, the second electrode wire and the touch electrode;
in a touch detection stage, a common voltage signal is sent to the first electrode wire, and a touch detection signal is sent to the second electrode wire and the touch electrode;
in the capacitance detection stage, a common voltage signal is sent to the first electrode wire, a capacitance detection signal is sent to the second electrode wire and the touch electrode, whether the touch electrode with abnormal capacitance exists or not is judged, and if the touch electrode with abnormal capacitance exists, a calibration stage is carried out; in the calibration stage, a calibration signal is sent to the touch electrode with abnormal capacitance.
In a third aspect, the present application further provides a display device, including the display panel provided by the present application.
Compared with the prior art, the display panel, the driving method and the display device provided by the invention have the advantages that at least the following beneficial effects are realized:
in the display panel, the driving method thereof and the display device provided by the application, a 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 touch electrodes contained in the second touch electrode row is smaller than that of touch electrodes contained in the first touch electrode row. In the application, a first electrode wire and a second electrode wire are introduced into a non-display area, and in a display stage, the first electrode wire, the second electrode wire and a touch electrode all receive a common voltage signal; in the 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 particular, the method also introduces a capacitance detection stage and a calibration stage, in the capacitance detection stage, the touch electrode receives a capacitance detection signal and judges whether a touch electrode with abnormal capacitance exists, if so, the calibration stage is entered; in the calibration stage, a calibration signal is sent to the touch electrode with abnormal capacitance. According to the method and the device, the process of carrying out capacitance detection on the touch electrode and the process of calibrating the touch electrode with abnormal capacitance detection are introduced into the display panel, so that the reference capacitance of each touch electrode on the display panel is kept consistent, the phenomenon that the touch electrode is in a disordered jump point and a frozen screen phenomenon are caused due to different numbers of the touch electrodes contained in the first touch electrode row and the second touch electrode row is effectively improved, the phenomenon that the abnormal touch of the special-shaped display panel cannot be normally carried out and the false triggering phenomenon of the touch electrode are improved, and further the touch performance of the display panel and the display device is improved.
Of course, it is not necessary for any one product embodying the invention to achieve all of the technical effects described above at the same time.
Other features of the present invention and its advantages will become apparent from the following detailed description of exemplary embodiments of the invention, 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 diagram of a display panel according to 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 a display panel according to an embodiment of the present disclosure;
FIG. 4 is a top view of a display panel according to an embodiment of the present disclosure;
fig. 5 is a diagram showing a relative positional relationship between a touch trace and a touch electrode in a display panel according to an embodiment of the present disclosure;
FIG. 6 is a cross-sectional view of the display panel along AA' of the embodiment of FIG. 5;
fig. 7 is a flowchart of a driving method of a display panel according to an embodiment of the present application;
FIG. 8 is a driving timing chart of a display panel according to an embodiment of the present disclosure;
fig. 9 is a schematic 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, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless it is specifically stated otherwise.
The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to one 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 specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of exemplary embodiments may have different values.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.
Fig. 1 is a schematic structural diagram of a display panel provided in the prior art, where the display panel 300 includes a plurality of touch electrode rows, the touch electrode rows include 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. According to actual test data, in a standby state, the capacitance value of the touch electrode 303 in the first touch electrode row 301 is larger than that of the touch electrode 303 in the second touch electrode row 302 at normal temperature and low temperature, and the existence of the capacitance difference is extremely easy to cause the phenomenon of disordered jump points and frozen screen of the display panel to influence normal touch performance, wherein the disordered jump points refer to the phenomenon that the touch electrode is triggered by mistake under the condition of unmanned touch of the display panel, for example, APP on a mobile phone is automatically turned on during unmanned touch; the screen freezing phenomenon means that the touch electrode does not react in the touch process and cannot perform normal touch.
In view of this, the present invention provides a display panel, a driving method thereof and a display device, which are beneficial to improving the phenomenon that the abnormal display panel cannot be touched normally and the phenomenon that the touch electrode is triggered by mistake.
The following detailed description will proceed with reference being made to the drawings and detailed description of embodiments.
Fig. 2 is a top view of a display panel according to an embodiment of the present application, where the display panel 100 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 comprises a first display area 31 and at least one second display area 32, the second display area 32 being located on at least one side of the first recessed section 21 in the first direction; the second display area 32 is adjacent to the first display area 31 in the second direction, and the first direction and the second direction intersect; the display panel 100 further includes:
a plurality of touch electrode rows 40 extending along the first direction and arranged along the second direction, the touch electrode rows 40 including 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, the second touch electrode row 42 including a smaller number of touch electrodes 50 than the first touch electrode row 41;
a first electrode line 51 and a second electrode line 52 disposed in the non-display area 20, the first electrode line 51 disposed around the first edge 11 and the second edge 12, the second electrode line 52 being located at a side of the first electrode line 51 near the first edge 11 and the second edge 12;
in the display stage, the first electrode line 51, the second electrode line 52 and the touch electrode 50 receive a common voltage signal; in the touch detection stage, the first electrode wire 51 receives a common voltage signal, and the second electrode wire 52 and the touch electrode 50 receive a touch detection signal; in the capacitance detection stage, the first electrode wire 51 receives the common voltage signal, and the second electrode wire 52 and the touch electrode 50 receive the capacitance detection signal; during the calibration phase, the touch electrode 50 at least partially located in the second display area 32 receives 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, and in some other embodiments of the present application, the first edge 11 may further include two or more first concave sections 21, which is not limited in number, and the present application only uses the case that the first edge 11 includes one first concave section 21 as an example. In fig. 2, line segments with different thicknesses are used to distinguish the first electrode line 51 from the second electrode line 52, but the actual line widths of the first electrode line 51 and the second electrode line 52 are not represented. In addition, fig. 2 only shows the situation that the first concave section 21 is located at the middle position of the first edge 11, and 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 embodiment of the present application, the position of the first concave section 21 is not specifically limited, and only the structure shown in fig. 2 is described below as an example.
Specifically, 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 section 21, and the first recessed section 21 is recessed toward the inside of the display area 10, so that the display area 10 exhibits a non-rectangular shaped structure. The display area 10 comprises a first display area 31 and at least one second display area 32 adjacent to the first recessed 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 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 due to the presence of the first concave section 21. In addition, the first electrode line 51 and the second electrode line 52 are introduced into the non-display area 20, and the first electrode line 51, the second electrode line 52 and the touch electrode 50 all receive a common voltage signal in the display stage; in the touch detection phase, the first electrode line 51 receives the common voltage signal, and the second electrode line 52 and the touch electrode 50 receive the touch detection signal. In particular, the application also 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 so, enters the calibration stage; in the calibration phase, a calibration signal is sent to the touch electrode 50 with abnormal capacitance. According to the method and the device, the process of carrying out capacitance detection on the touch electrode 50 and the process of calibrating the touch electrode 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 phenomenon that the touch electrode 50 is in a disordered jump point phenomenon and a frozen screen phenomenon caused by different numbers of the touch electrodes 50 contained in the first touch electrode row 41 and the second touch electrode row 42 is effectively improved, the phenomenon that the abnormal touch of the special-shaped display panel 100 cannot be carried out and the false triggering phenomenon of the touch electrode 50 are improved, and further the touch performance of the display panel 100 and the display device is improved.
In the present application, the first electrode lines 51 introduced in 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, and in the display stage, the touch detection stage and the capacitance detection stage, the first electrode lines 51 are all configured to receive a common voltage signal, where the common voltage signal is a constant level signal, and when the first electrode lines 51 that receive a constant level signal are disposed at the periphery of the display area 10, the first electrode lines 51 are beneficial to shielding the interference signal at the periphery of the display panel 100, so as to avoid the influence of the interference signal on the circuit in the display area 10.
In the display stage, the touch electrode 50 in the application is multiplexed into a common electrode, and receives a common voltage signal; in the touch detection phase, the touch electrode 50 in the present application receives a touch detection signal. In this way, the touch electrode 50 and the common electrode are multiplexed, and different film structures are not required to be respectively arranged on the display panel 100 for the touch electrode 50 and the common electrode, so that the film structure of the display panel 100 is simplified, and the requirement of 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, it is to be understood that the structure of the display panel 100 not only includes the illustration in the drawings, but also may include other technical features known in the prior art for implementing the display function, such as a pixel unit located in a display area, a gate driving unit (not illustrated in the drawings) located in a non-display area, and the like, which are not illustrated and described herein in detail. The shape of the touch electrode in this embodiment is only schematically illustrated as a square, and in specific implementation, the shape of the touch electrode may be any other shape. The number and the size of the touch electrodes in this embodiment are also only schematically illustrated, and in the specific implementation, the number of the touch electrodes is not limited to the number in the figure, and the size of the touch electrodes can also be set according to actual requirements.
In some alternative embodiments, the first electrode line 51, the second electrode line 52 and the touch electrode 50 are located on the same film layer. Therefore, the first electrode wire 51, the second electrode wire 52 and the touch electrode 50 in the present application can be manufactured simultaneously by the same process, and different processes and film structures are not required to be introduced for the first electrode wire 51, the second electrode wire 52 and the touch electrode 50, so that the production 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 first electrode line 51 and the second electrode line 52 have a space width D0, D0 > 100 μm in a direction parallel to the plane of the display panel 100.
Specifically, with continued reference to fig. 2, since the signals received on the first electrode line 51 and the second electrode line 52 are different in the touch detection phase and the capacitance detection phase, the first electrode line 51 is used to receive the common voltage signal in both the touch detection phase and the capacitance detection phase; in the touch stage, the second electrode wire 52 is configured to receive a touch detection signal; in the capacitance detection phase, the second electrode line 52 is used for receiving a capacitance detection signal. When the distance between the first electrode line 51 and the second electrode line 52 is smaller, a larger coupling capacitance is formed between the first electrode line 51 and the second electrode line 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 random jump points and frozen screen. And when the interval D0 between the first electrode wire 51 and the second electrode wire 52 is set to be larger than 100 mu m, the interval between the first electrode wire 51 and the second electrode wire 52 is increased, so that the coupling capacitance between the first electrode wire 51 and the second electrode wire 52 is reduced, the influence of signals on the first electrode wire 51 on the second electrode wire 52 and the signals of the touch electrode 50 in the touch detection stage and the capacitance detection stage is reduced, the accuracy of touch detection and the accuracy of capacitance detection are improved, and meanwhile the possibility of messy jump points and frozen screen phenomena of the display panel is reduced.
Alternatively, in the display panel 100 provided in the embodiment of the present application, the line width of the first electrode line 51 is D1, and D1 < 50 μm.
Specifically, with continued reference to fig. 2, the line width of the first electrode line 51 is set smaller, specifically set 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, the influence of external electric signals on the circuit in the display panel 100 is avoided, and meanwhile, the frame width occupied by the first electrode line 51 can be reduced, so that the narrow frame design of the display panel 100 is facilitated.
In some alternative embodiments, referring to fig. 4, fig. 4 is a top view of another display panel 100 provided in an embodiment of the present application, where in the display panel 100 provided in the embodiment, the non-display area 20 includes a binding area 22 and a first frame area 23 opposite to the binding area 22; the second electrode line 52 includes a sub-line segment 521 located in the first frame region 23, and the line width of the sub-line segment 521 is greater than that of the first electrode line 51.
Specifically, fig. 4 shows an embodiment in which the second electrode line 52 includes a sub-line 521 having a larger line segment. The line width of the sub-line segment 521 of the second electrode line 52 located in the first frame region 23 is larger than the line width of the first electrode line 51, and in general, there are fewer line structures disposed in the first frame region 23 disposed opposite to the bonding region 22 on the display panel 100, and on the premise of realizing a narrow frame, there is a certain space for disposing the sub-line segment 521 with a larger line width in the first frame region 23. Since the first electrode line 51 and the second electrode line 52 both receive the common voltage signal in the display stage, when the width of the sub-line segment 521 of the second electrode line 52 located in the first frame region 23 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 beneficial to improving the shielding effect of the first electrode line 51 and the second electrode line 52 on the external electric signal in the display stage, avoiding interference of the external electric signal on the normal display of the display panel 100, and thus being more beneficial to improving the display reliability of the display panel 100.
Optionally, fig. 5 is a diagram showing a relative positional 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 along AA' of the display panel 100 provided in the embodiment of fig. 5, the display panel 100 further includes a plurality of touch traces 60 and a plurality of dummy traces 61, and the touch trace 60 and the dummy trace 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 line 52.
Specifically, in order to realize signal interaction between the touch electrode 50 and the driving chip 90 on the display panel 100, a touch trace 60 is generally introduced on the display panel 100 for connecting the touch electrode 50 and the driving chip 90, and 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 into each touch electrode 50, it is not ensured that the touch traces 60 are uniformly arranged in the display area 10 of the display panel 100, and thus a phenomenon of uneven load of the display panel 100 may occur. Therefore, the present application introduces a plurality of dummy traces 61 on 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 on the display panel 100, the present application is beneficial to realizing impedance matching in the display panel 100 and improving load uniformity. In addition, the present application electrically connects the dummy trace 61 introduced in the display panel 100 to the second electrode line 52, so that the dummy electrode is equipotential with the second electrode line 52 and receives the same electrical signal. For example, in the touch detection stage, the dummy trace 61 and the second electrode line 52 both receive the touch detection signal, and the touch trace 60 and the touch electrode 50 both also receive the touch detection signal; in the display stage, the dummy trace 61 and the touch trace 60 both receive a common voltage signal; in this way, the equipotential of the dummy trace 61 and the touch trace 60 can be ensured, and signal coupling between the touch trace 60 and the dummy trace 61 is avoided, that is, interference of the dummy trace 61 to 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, in fig. 5, the touch trace 60 and the dummy trace 61 are distinguished by the thickness of the lines, and do not represent actual line widths, 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, fig. 7 is a flowchart of a driving method of the display panel 100 according to an embodiment of the present application, where the driving method is used for driving the display panel 100 according to the present application, and referring to fig. 2 and 7, the driving method of the display panel 100 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, where,
in the display stage, a common voltage signal is transmitted 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 wire 51, a capacitance detection signal is sent to the second electrode wire 52 and the touch electrode 50, whether the touch electrode 50 with abnormal capacitance exists or not is judged, and if so, a calibration stage is carried out; in the calibration phase, a calibration signal is sent to the touch electrode 50 with 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 order between the display stage, the touch detection stage and the capacitance detection stage, and the order of the three stages can be flexibly set according to the actual requirement.
Specifically, please refer to fig. 2, 7 and 8, fig. 8 is a driving timing diagram of the display panel 100 according to an embodiment of the present application, wherein T1 represents a capacitive detection stage, T2 represents a touch detection stage, and T3 represents a display stage; VCOM1 represents signals received by the first electrode line 51 during the display phase, the touch detection phase and the capacitance detection phase; VCOM2 represents signals 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, besides the display stage and the touch detection stage, a capacitance detection stage is also introduced to detect each touch electrode 50 on the display panel 100. Since the display area 10 of the display panel 100 is in a 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 the number of the touch electrodes 50 included in the second touch electrode row 42 is smaller than that of the touch electrodes 50 included in the first touch electrode row 41 due to the existence of the first concave section 21, so that in a standby state, the capacitance value of the touch electrodes 50 in the second touch electrode row 42 is larger than that of the touch electrodes 50 in the first touch electrode row 41, and the difference of the capacitances is very easy to cause a phenomenon of random jump points and frozen screen of the touch electrodes 50, so that the normal touch performance is affected. In the driving method of the display panel 100 provided in the present application, a capacitance detection stage is introduced, in which the touch electrode 50 receives a capacitance detection signal, and determines whether there is a touch electrode 50 with abnormal capacitance in the display panel 100 (typically, the touch electrode 50 with abnormal capacitance will appear in the second touch electrode row 42), and if so, a calibration stage is entered; in the calibration phase, a calibration signal is sent to the touch electrode 50 with abnormal capacitance. According to the method and the device, the process of carrying out capacitance detection on the touch electrode 50 and the process of calibrating the touch electrode 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 phenomenon that the touch electrode 50 is in a disordered jump point phenomenon and a frozen screen phenomenon caused by different numbers of the touch electrodes 50 contained in the first touch electrode row 41 and the second touch electrode row 42 is effectively improved, the phenomenon that the abnormal touch of the special-shaped display panel 100 cannot be carried out and the false triggering phenomenon of the touch electrode 50 are improved, and further the touch performance of the display panel 100 is 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 may change a portion of the touch detection stage in the prior art into the capacitance detection stage, so that the normal scan period of the display panel 100 is not increased.
Optionally, in the driving method of the display panel 100 provided in the embodiment of the present application, in the stage of capacitance detection, it is determined whether the touch electrode 50 with abnormal capacitance exists, 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 larger 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 through 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 the 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, a new module structure is not required to be added on the display panel 100, and the capacitance detection process can be realized by only changing the driving program on the display panel 100.
Optionally, in the driving method of the display panel 100 provided in the embodiment of the present application, in a calibration stage, a calibration signal is sent to the touch electrode 50 with abnormal capacitance, specifically:
and sending a capacitance calibration signal to the touch electrode 50 with abnormal capacitance, and calibrating the capacitance value of the touch electrode 50 with abnormal capacitance to ensure that the capacitance value of each touch electrode 50 is equal to a preset capacitance value.
Specifically, after the touch electrode 50 with abnormal capacitance is found, the present application calibrates the capacitance value of the touch electrode 50 with abnormal capacitance, 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 phenomenon that the touch electrodes 50 are jumped randomly and frozen due to the difference of the capacitance values of the touch electrodes 50 is avoided, and the touch performance of the display panel 100 is improved. It should be noted that, the calibration process of the touch electrode 50 with abnormal capacitance may also be performed by the driving chip 90 on the display panel 100, and even if the calibration process is introduced, the calibration process can be implemented by only changing the driving program on the display panel 100 without adding a new module structure on the display panel 100.
Alternatively, in the driving method of the display panel 100 provided in the embodiment of the present application, for example, please refer to fig. 8, the display phase T2, the capacitance detection phase T2 and the touch detection phase T3 are alternately performed in the same time period. In this way, in the same time period, the display stage, the capacitance detection stage and the touch detection stage are integrated, the capacitance detection stage is introduced in each time period, the capacitance of each touch electrode 50 on the display panel 100 is detected, and after the touch electrode 50 with abnormal capacitance is found, the touch electrode 50 with abnormal capacitance is calibrated in time, so that the capacitance values on which each touch electrode 50 on the display panel 100 is based are the same when the touch occurs, and the phenomenon of disordered skip and frozen screen of the display panel 100 is improved. It should be noted that, in the timing chart shown in fig. 8, only one execution sequence of the display stage T2, the capacitance detection stage T2, and the touch detection stage T3 is illustrated, and in some other embodiments of the present application, the execution sequences of the display stage T2, the capacitance detection stage T2, and the touch detection stage T3 may be embodied as other, which is not limited in detail herein.
Based on the same inventive concept, the present application further provides a display device, fig. 9 is a block 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, where the display panel is the display panel 100 provided in the embodiment of the present application. It should be noted that, in the embodiment of the display device 200 provided in the embodiment of the present application, reference may be made to the embodiment of the display panel 100 described above, and the repetition is omitted. The display device 200 provided in the present application may be: any product or component with realistic 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 concave section 21, the display device 200 may further include a camera and/or an optical sensor located in a space formed by the first concave section. Specifically, the camera and/or the optical sensor are arranged in the space formed by the first concave section, so that the requirements of consumers on the display device in social development are met, and the practicability of the display device is improved. In addition, the camera and/or the optical sensor are/is arranged in the space formed by the first concave section, so that the display effect of the full screen can be realized, and the high integration of the display device is facilitated.
In summary, 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, a 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 touch electrodes contained in the second touch electrode row is smaller than that of touch electrodes contained in the first touch electrode row. In the application, a first electrode wire and a second electrode wire are introduced into a non-display area, and in a display stage, the first electrode wire, the second electrode wire and a touch electrode all receive a common voltage signal; in the 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 particular, the method also introduces a capacitance detection stage and a calibration stage, in the capacitance detection stage, the touch electrode receives a capacitance detection signal and judges whether a touch electrode with abnormal capacitance exists, if so, the calibration stage is entered; in the calibration stage, a calibration signal is sent to the touch electrode with abnormal capacitance. According to the method and the device, the process of carrying out capacitance detection on the touch electrode and the process of calibrating the touch electrode with abnormal capacitance detection are introduced into the display panel, so that the reference capacitance of each touch electrode on the display panel is kept consistent, the phenomenon that the touch electrode is in a disordered jump point and a frozen screen phenomenon are caused due to different numbers of the touch electrodes contained in the first touch electrode row and the second touch electrode row is effectively improved, the phenomenon that the abnormal touch of the special-shaped display panel cannot be normally carried out and the false triggering phenomenon of the touch electrode are improved, and further the touch performance of the display panel and the display device is improved.
While certain specific embodiments of the invention have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the 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 region and a non-display region surrounding the display region, the display region comprising a first edge and a second edge adjacent the first edge, the first edge comprising a first recessed section, the first recessed section being recessed toward an interior of the display region; 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 intersected; 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 contained in the second touch electrode row is smaller than that of touch electrodes contained in the first touch electrode row;
a first electrode line and a second electrode line disposed in the non-display region, the first electrode line disposed around the first edge and the second edge, the second electrode line being located at a side of the first electrode line near the first edge and the second edge;
in a display stage, the first electrode line, the second electrode line and the touch electrode receive a common voltage signal; in the 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 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 electrode positioned in the second display area receives a calibration signal.
2. The display panel of claim 1, wherein the first electrode line, the second electrode line, and the touch electrode are located in the same film layer.
3. The display panel according to claim 1, wherein a width of a space between the first electrode line and the second electrode line in a direction parallel to a plane in which the display panel is located is D0, D0 > 100 μm.
4. The display panel according to claim 1, wherein the line width of the first electrode line is D1, D1 < 50 μm.
5. The display panel of claim 1, wherein the non-display area includes a binding area and a first frame area disposed opposite the binding area;
the second electrode line comprises a sub-line segment positioned in the first frame area, and the line width of the sub-line segment is larger than that of the first electrode line.
6. The display panel of claim 1, further comprising a plurality of touch traces and a plurality of dummy traces, the touch traces and the dummy traces being located in a same film layer;
the touch electrodes are electrically connected with the touch wiring in a one-to-one correspondence manner, and each dummy wiring is electrically connected with the second electrode wire respectively.
7. The method for driving a display panel according to any one of claims 1 to 6, wherein the method for driving a display panel includes a driving method for a display stage, a driving method for a touch detection stage, a driving method for a capacitance detection stage, and a driving method for a calibration stage, wherein,
in a display stage, a common voltage signal is sent to the first electrode wire, the second electrode wire and the touch electrode;
in a touch detection stage, a common voltage signal is sent to the first electrode wire, and a touch detection signal is sent to the second electrode wire and the touch electrode;
in the capacitance detection stage, a common voltage signal is sent to the first electrode wire, a capacitance detection signal is sent to the second electrode wire and the touch electrode, whether the touch electrode with abnormal capacitance exists or not is judged, and if the touch electrode with abnormal capacitance exists, a calibration stage is carried out; in the calibration stage, a calibration signal is sent to the touch electrode with abnormal capacitance.
8. The method according to claim 7, wherein in the capacitance detection stage, the touch electrode for determining whether there is abnormal capacitance is specifically:
and acquiring the 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 larger than the preset capacitance value, determining that the touch electrode is a touch electrode with abnormal capacitance.
9. The method according to claim 8, wherein in the calibration phase, the calibration signal is sent to the touch electrode with abnormal capacitance, specifically:
and sending a capacitance calibration signal to the touch electrode with abnormal capacitance, and calibrating the capacitance value of the touch electrode with abnormal capacitance to ensure that the capacitance value of each touch electrode is 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 alternately performed 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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| CN111755465B (en) * | 2020-06-30 | 2022-09-23 | 厦门天马微电子有限公司 | Display module and display device |
| WO2024020931A1 (en) * | 2022-07-28 | 2024-02-01 | 京东方科技集团股份有限公司 | Display substrate and display apparatus |
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