CN111831155A - Display panel, display device and driving method of display panel - Google Patents
Display panel, display device and driving method of display panel Download PDFInfo
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- CN111831155A CN111831155A CN202010538295.3A CN202010538295A CN111831155A CN 111831155 A CN111831155 A CN 111831155A CN 202010538295 A CN202010538295 A CN 202010538295A CN 111831155 A CN111831155 A CN 111831155A
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- 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
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- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
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Abstract
The invention discloses a display panel, a display device and a driving method of the display panel. The display panel comprises an array substrate, wherein the array substrate comprises a first metal layer, a second metal layer and a third metal layer which are sequentially stacked and mutually insulated; the touch electrode layer is arranged on one side of the third metal layer, which is opposite to the second metal layer, and is insulated from the third metal layer, and the touch electrode layer is electrically connected with the control chip through a touch lead; and the display function layer is arranged on one side of the touch electrode layer, which is opposite to the third metal layer, and is insulated from the touch electrode layer. According to the embodiment of the invention, the thickness of the display panel can be reduced.
Description
Technical Field
The invention belongs to the technical field of electronic products, and particularly relates to a display panel, a display device and a driving method of the display panel.
Background
In recent years, touch technology is more and more widely applied to display devices of various sizes, and as a display panel of a novel human-computer interaction input mode, a touch screen is simpler, more direct and more convenient to input compared with the traditional modes of a display, a keyboard and a mouse.
The touch display panel generally includes a display panel and a touch panel. When the touch display panel is prepared, the most basic scheme is to prepare the display panel and the touch panel respectively, and then attach the display panel and the touch panel to form the touch display panel. With the development of display technologies, the demands of users for thinning and lightening display panels are increasing. However, the thickness of the display panel manufactured by the above scheme cannot better meet the light and thin requirements of users.
Therefore, a new display panel, a new display device and a new driving method of the display panel are needed.
Disclosure of Invention
The invention provides a display panel, a display device and a driving method of the display panel, which can reduce the thickness of the display panel.
In a first aspect, an embodiment of the present invention provides a display panel, including:
the array substrate comprises a first metal layer, a second metal layer and a third metal layer which are sequentially stacked and mutually insulated;
the touch electrode layer is arranged on one side of the third metal layer, which is opposite to the second metal layer, and is insulated from the third metal layer, and the touch electrode layer is electrically connected with the control chip through a touch lead;
and the display function layer is arranged on one side of the touch electrode layer, which is opposite to the third metal layer, and is insulated from the touch electrode layer.
In a possible implementation manner of the first aspect, the touch electrode layer includes a plurality of touch electrode blocks disposed in an insulated manner, and each of the touch electrode blocks is electrically connected to the control chip through a touch lead.
In a possible implementation manner of the first aspect, the touch lead and the touch electrode block are disposed on the same layer;
or the touch lead is arranged between the third metal layer and the touch electrode layer and insulated from the third metal layer and the touch electrode layer, and the touch lead is a metal lead.
In a possible implementation manner of the first aspect, the touch lead lines with the same length have the same line width, and the longer the touch lead lines have the larger line width.
In a possible implementation manner of the first aspect, the touch electrode layer includes a touch driving electrode and a touch sensing electrode that are disposed in an insulated manner and have projections perpendicular to each other on a display panel, the touch lead includes a touch driving lead and a touch sensing lead, the touch driving electrode is electrically connected through the touch driving lead, and the touch sensing electrode is electrically connected with the control chip through the touch sensing lead.
In a possible implementation manner of the first aspect, the touch driving electrodes and the touch sensing electrodes are both strip-shaped electrodes, and the touch driving electrodes and the touch sensing electrodes are disposed in different layers;
or the touch driving electrode comprises a plurality of driving electrode blocks which are electrically connected with each other, the touch sensing electrode comprises a plurality of sensing electrode blocks which are electrically connected with each other, the driving electrode blocks and the sensing electrode blocks are arranged on the same layer, and any one of the driving electrode blocks and the sensing electrode blocks is electrically connected in a bridge-crossing mode.
In a possible implementation manner of the first aspect, the display function layer includes a plurality of light emitting units, each of the light emitting units includes a first electrode, a light emitting layer, and a second electrode, which are stacked, the first electrode is located on a side of the light emitting layer facing the touch electrode layer, and the second electrode is located on a side of the light emitting layer facing away from the touch electrode layer;
the second electrode corresponding to the area between the adjacent light-emitting layers is of a hollow structure.
In a possible implementation manner of the first aspect, the touch electrode layer is insulated from the third metal layer by the first planarization layer, and the display function layer is insulated from the touch electrode layer by the second planarization layer;
the display function layer further comprises a pixel definition structure, the pixel definition structure defines a plurality of opening regions, and the light emitting units are arranged in the opening regions in a one-to-one correspondence mode.
In a second aspect, an embodiment of the present invention provides a display device, including the display panel according to any one of the embodiments of the first aspect.
In a second aspect, an embodiment of the present invention provides a method for driving a display panel, where the method is applied to the display panel according to any one of the embodiments of the first aspect, and the method includes:
inputting a touch driving voltage to the touch electrode at a touch position detection stage within a frame time, and controlling the display panel to be in a non-display state;
inputting a light emitting signal to the display function layer in a light emitting stage within a frame time to enable the display panel to display preset image information;
the duration of the light-emitting stage is greater than that of the touch position detection stage, and in the touch position detection stage, the non-display state of the display panel cannot be identified by human eyes.
According to the embodiment of the invention, the touch electrode layer is positioned between the display function layer and the third metal layer of the array substrate, the touch electrode layer is not required to be arranged on one side of the display function layer, which is opposite to the array substrate, and a protective layer is not required to be arranged to protect the touch electrode layer, so that on one hand, the overall thickness of the display panel can be reduced, and the light and thin requirements of users are met; on the other hand, the process flow can be reduced, so that the manufacturing time of the display panel can be shortened, and the manufacturing cost of the display panel can be reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments of the present invention will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Other features, objects and advantages of the invention will become apparent from the following detailed description of non-limiting embodiments thereof, when read in conjunction with the accompanying drawings, in which like reference characters designate the same or similar parts throughout the figures thereof, and which are not to scale.
FIG. 1 is a schematic front view of a display panel according to an embodiment of the present invention;
FIG. 2 is a schematic top view of a display panel according to an embodiment of the present invention;
FIG. 3 is a schematic top view of a display panel according to another embodiment of the present invention;
FIG. 4 is a schematic top view of a display panel according to another embodiment of the present invention;
FIG. 5 is a schematic top view of a display panel according to another embodiment of the present invention;
FIG. 6 is a cross-sectional view taken along line A-A of FIG. 5, according to one embodiment of the present invention;
FIG. 7 is a schematic top view of a display panel according to another embodiment of the present invention;
FIG. 8 is a schematic top view of a display panel according to another embodiment of the present invention;
fig. 9 is a flowchart of a driving method of a display panel according to an embodiment of the present invention.
Description of reference numerals:
100-a display panel;
10-an array substrate; 11-a substrate; 12-an active layer; 131-a first metal layer; 132-a second metal layer; 133-a third metal layer; 141-a first insulating layer; 142-a second insulating layer; 143-a third insulating layer; 151-first planarizing layer; 152-a second planarization layer; 16-a touch electrode layer; 161-touch electrode block; 162-touch drive electrodes; 1621-a drive electrode block; 1622-a first connection; 163-touch sensing electrodes; 1631-an induction electrode block; 1632-a second connecting portion;
20-a control chip; 21-touch lead; 211-touch drive leads; 212-touch sensing lead;
30-a display functional layer; 31-a light emitting unit; 311-a first electrode; 312-a light emitting layer; 313-a second electrode; 32-pixels define the structure.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the invention. It will be apparent to one skilled in the art that the present invention may be practiced without some of these specific details.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.
It will be understood that when a layer, region or layer is referred to as being "on" or "over" another layer, region or layer in describing the structure of the component, it can be directly on the other layer, region or layer or intervening layers or regions may also be present. Also, if the component is turned over, one layer or region may be "under" or "beneath" another layer or region.
For better understanding of the present invention, the display panel, the display device and the driving method of the display panel according to the embodiments of the present invention will be described in detail below with reference to fig. 1 to 9.
Fig. 1 is a front view of a display panel provided according to a first embodiment of the present invention. Fig. 2 to 5 are top views of display panels provided by embodiments of the present invention. In fig. 2 to 5, other film layers of the display panel are shown hidden for clearly showing the structure of the touch electrode layer.
As shown in fig. 1 to 5, an embodiment of the invention provides a display panel 100. The display panel 100 includes an array substrate 10 and a display function layer 30. The touch electrode layer 16 of the display panel 100 is located between the array substrate 10 and the display function layer 30, and is insulated from the array substrate 10 and the display function layer 30.
In some alternative embodiments, the array substrate 10 may include a first metal layer 131, a second metal layer 132, and a third metal layer 133, which are sequentially stacked and insulated from each other. The touch electrode layer 16 is disposed on a side of the third metal layer 133 opposite to the second metal layer 132, and is insulated from the third metal layer 133. The touch electrode layer 16 is electrically connected to the control chip 20 through a touch lead 21. The display function layer 30 is disposed on a side of the touch electrode layer 16 opposite to the third metal layer 133, and is insulated from the touch electrode layer 16.
According to the embodiment of the invention, the touch electrode layer 16 is located between the display function layer 30 and the third metal layer 133 of the array substrate 10, and the touch electrode layer 16 does not need to be arranged on the side of the display function layer 30 opposite to the array substrate 10, and further a protective layer does not need to be arranged to protect the touch electrode layer 16, so that on one hand, the overall thickness of the display panel can be reduced, and the light and thin requirements of users can be met; on the other hand, the process flow can be reduced, so that the manufacturing time of the display panel can be shortened, and the manufacturing cost of the display panel can be reduced.
In some alternative embodiments, the array substrate 10 may include a substrate 11, and the first metal layer 131, the second metal layer 132, and the third metal layer 133 of the array substrate 10 may be stacked on the substrate 11. The substrate 11 may be formed of a rigid material, such as glass; the substrate 11 may also be formed of a flexible material, such as Polyimide (PI). The material of the substrate 11 is not limited in the present invention.
The array substrate 10 may include an active layer 12. The active layer 12 may be disposed on the substrate 11 between the first metal layer 131 and the substrate 11. The active layer 12 may be a p-si semiconductor or an a-si semiconductor. A buffer layer (not shown) may be disposed between the active layer 12 and the substrate 11.
In some alternative embodiments, the array substrate 10 may include a first insulating layer 141, a second insulating layer 142, and a third insulating layer 143. The first insulating layer 141 is located between the active layer 12 and the first metal layer 131, so as to realize the insulating arrangement of the active layer 12 and the first metal layer 131. The second insulating layer 142 is located between the first metal layer 131 and the second metal layer 132, so as to realize the insulating arrangement of the first metal layer 131 and the second metal layer 132. The third insulating layer 143 is located between the second metal layer 132 and the third metal layer 133, so as to realize the insulating arrangement of the second metal layer 132 and the third metal layer 133.
In some alternative embodiments, a pixel driving circuit for driving the display function layer 30 to emit light for display may be formed on the array substrate 10. The pixel driving circuit may include a thin film transistor including a gate electrode, a source electrode, a drain electrode, and a semiconductor layer, the gate electrode being electrically connected to the scan line. A gate electrode is formed on the first metal layer 131, source and drain electrodes are formed on the third metal layer 133, and a semiconductor layer is formed on the active layer 12. The drain electrode is electrically connected to the display function layer 30, so that when the display panel performs a light emitting display, the turn-on and turn-off of each thin film transistor can be controlled by the scan line, and when the thin film transistor is turned on, the driving signal on the data line is transmitted to the display function layer 30, thereby performing a light emitting display of the display function layer 30.
The drain electrode is electrically connected to the display function layer 30, and needs to penetrate through the touch electrode layer 16, so that the touch electrode layer 16 can be perforated to realize the electrical connection between the drain electrode and the display function layer 30.
In some optional embodiments, as shown in fig. 2, the touch electrode layer 16 includes a plurality of touch electrode blocks 161 insulated from each other, and each touch electrode block 161 is electrically connected to the control chip 20 through a touch lead 21. The plurality of touch electrode blocks 161 are distributed in an array. In the first direction X, m touch electrode blocks 161 may be disposed, and in the second direction Y, n touch electrode blocks 161 may be disposed, that is, m × n touch electrode blocks 161 are disposed in total.
The touch electrode block 161 may be a transparent electrode. For example, a transparent conductive material such as Indium Tin Oxide (ITO).
The touch electrode block 161 is a self-capacitance electrode, which serves as both a touch driving electrode and a touch sensing electrode. Specifically, each touch lead 21 is used for sending a touch driving signal sent by the control chip 20 to each touch electrode block 161, and transmitting a touch sensing signal generated by the touch electrode block 161 back to the control chip 20 through the same touch lead 21.
The control chip 20 is generally an IC chip, and determines the touch position by detecting the change of the touch driving signal and the touch sensing signal, specifically, by the capacitance change of the touch electrode blocks 161, if the number of the touch electrode blocks 161 in the first direction X is set to m and the number of the touch electrode blocks 161 in the second direction Y is set to n, the number of the touch position detection locations is m × n.
According to the embodiment of the invention, each touch electrode block 161 of the touch electrode layer 16 is a self-capacitance electrode, and each touch electrode block 161 is located on the same film layer, so that the touch electrode layer 16 can be manufactured by only one process, the process flow is further reduced, the manufacturing time of the display panel can be shortened, and the manufacturing cost of the display panel is reduced.
In some alternative embodiments, with continued reference to fig. 2, the touch lead 21 may be disposed on the same layer as the touch electrode block 161. The touch lead 21 may be disposed between adjacent touch electrode blocks 161. The touch lead 21 and the touch electrode block 161 may be formed of the same material, for example, both formed of transparent ITO. Thus, the touch lead 21 and the touch electrode block 161 can be formed simultaneously by only one process, so as to further reduce the process flow and shorten the manufacturing time of the display panel,
the manufacturing cost of the display panel is reduced.
In some optional embodiments, referring to fig. 3, the touch lead 21 may be disposed between the third metal layer 133 and the touch electrode layer 16, and is disposed in an insulated manner from the third metal layer 133 and the touch electrode layer 16, and the touch lead 21 may be a metal lead. Specifically, the touch lead 21 and each touch electrode block 161 of the touch electrode layer 16 may be electrically connected by a via. The touch lead 21 is disposed between the third metal layer 133 and the touch electrode layer 16, and an original insulating layer between the third metal layer 133 and the touch electrode layer 16 is used, that is, an additional insulating layer is not required. Moreover, the touch lead 21 is made of a metal material, and the metal material has low impedance, so that the touch recognition sensitivity can be provided.
In some alternative embodiments, the line widths of the touch lead lines 21 having the same length are the same, and the line width of the touch lead line 21 having the longer length is larger. As shown in fig. 2 or fig. 3, the distances between the touch electrode blocks 161 and the control chip 20 are different, and the lengths of the touch leads 21 are different. If all the touch lead lines 21 have the same line width, the longer the touch lead lines 21 have, the larger the resistance value thereof, which causes the impedance of each touch lead line 21 to be inconsistent, thereby affecting the accuracy of touch position identification. The line width of the longer touch lead 21 is set to be larger, so that the resistance value of the longer touch lead 21 can be reduced, the impedance of each touch lead 21 is kept consistent, and the accuracy of touch position identification is improved.
In some alternative embodiments, as shown in fig. 4 and 5, the touch electrode layer 16 may be in the form of a mutual capacitance electrode. The touch electrode layer 16 includes a touch driving electrode 162 and a touch sensing electrode 163. The touch driving electrodes 162 and the touch sensing electrodes 163 are insulated from each other and have projections perpendicular to the display panel. The touch driving electrodes 162 may extend along the second direction Y, and the plurality of touch driving electrodes 162 are distributed at intervals in the first direction X. The touch sensing electrodes 163 may extend along the first direction X, and the touch sensing electrodes 163 are spaced apart in the second direction Y. The touch lead 21 includes a touch driving lead 211 and a touch sensing lead 213. The touch driving electrode 162 is electrically connected to the control chip 20 through a touch driving lead 211, and the touch sensing electrode 163 is electrically connected to the control chip 20 through a touch sensing lead 212.
In some embodiments, the touch driving electrodes 162 may also extend along the first direction X, and the plurality of touch driving electrodes 162 are distributed at intervals in the second direction Y. The touch sensing electrodes 163 extend along the second direction Y, and the touch sensing electrodes 163 are distributed at intervals in the first direction X. The invention is not limited in this regard.
In some optional embodiments, with reference to fig. 4, the touch driving electrodes 162 and the touch sensing electrodes 163 may be both stripe electrodes, and the touch driving electrodes 162 and the touch sensing electrodes 163 are disposed in different layers. An insulating layer may be disposed between the touch driving electrode 162 and the touch sensing electrode 163 for insulation.
In some optional embodiments, with continued reference to fig. 5, the touch driving electrode 162 may include a plurality of driving electrode blocks 1621 electrically connected to each other, and the touch sensing electrode 163 may include a plurality of sensing electrode blocks 1631 electrically connected to each other. The plurality of driving electrode blocks 1621 may be connected by a first connection portion 1622. The plurality of sensing electrode blocks 1631 may be connected through the second connection part 1632. The driving electrode block 1621 and the sensing electrode block 1631 may be disposed on the same layer, and any one of the adjacent driving electrode block 1621 and the adjacent sensing electrode block 1631 is electrically connected in a bridge-crossing manner. The driving electrode block 1621 and the sensing electrode block 1631 are disposed on the same layer, and the driving electrode block 1621 and the sensing electrode block 1631 can be formed simultaneously in the same process, thereby simplifying the process steps.
As shown in fig. 6, the adjacent sensing electrode blocks 1631 are electrically connected in a bridge-crossing manner, and the second connection part 1632 may be disposed on one side of the sensing electrode block 1631 facing the third metal layer 133, and electrically connect the sensing electrode block 1631 and the second connection part 1632 in a via-hole manner.
In some embodiments, a preset gap is formed between two adjacent driving electrode blocks 1621, between two adjacent sensing electrode blocks 1631, and between the adjacent driving electrode block 1621 and the sensing electrode block 1631, so that the driving electrode blocks 1621 and the sensing electrode blocks 1631 are insulated from each other, and the size of the gap can be adjusted according to actual process requirements and design requirements.
In some embodiments, the driving electrode block 1621 and the sensing electrode block 1631 may be formed of Indium Tin Oxide (ITO), metal nanowires of silver nanowires (AgNW), graphene, or the like. The first connection part 1621 may be the same material as the driving electrode block 1621, and the second connection part 1632 may be the same material as the sensing electrode block 1631.
In some embodiments, the shapes of the driving electrode block 1621 and the sensing electrode block 1631 may be diamond, triangle, rectangle, etc., which is not limited by the invention.
Compared with the mutual capacitance type touch electrode layer 16 arranged on the side of the display function layer 30 opposite to the array substrate 10, the mutual capacitance type touch electrode layer 16 is arranged between the display function layer 30 and the array substrate 10, and a protective layer is not required to be arranged to protect the touch electrode layer, so that the overall thickness of the display panel is reduced, the requirement of a user on the lightness and thinness of the display panel is met, the process flow can be reduced, the manufacturing time of the display panel can be shortened, and the manufacturing cost of the display panel is reduced.
In the embodiment of the mutual capacitance type shown in fig. 4 and 5, the control chip 20 sends a touch driving signal to the touch driving electrode 612 through the touch driving lead 211, and transmits a touch sensing signal generated by the touch sensing electrode 613 forming a mutual capacitance electrode pair with the touch driving electrode 612 back to the control chip 20 through the touch sensing lead 212, and at this time, the touch position is determined by detecting a capacitance change between the touch driving electrode 612 and the touch sensing electrode 613.
In the above embodiments, the touch driving wires 211 and the touch sensing wires 213 may be made of metal materials such as Mo, MoAlMo, TiAlTi, and the like, or may be made of transparent conductive materials such as ITO. The touch driving lead 211 and the touch sensing lead 213 are metal wires, and the metal wires have a small impedance value, so that the touch performance of the display panel can be improved.
In some embodiments, the display panel 100 may include a display area AA and a non-display area NA surrounding the display area AA, and the touch driving wires 211, the touch sensing wires 213 and the control chip 20 may be disposed in the non-display area NA.
In some optional embodiments, with reference to fig. 1, the display function layer 30 may include a plurality of light emitting units 31, each light emitting unit 31 may include a first electrode 311, a light emitting layer 312, and a second electrode 313, which are stacked, the first electrode 311 is located on a side of the light emitting layer 312 facing the touch electrode layer 16, and the second electrode 313 is located on a side of the light emitting layer 312 facing away from the touch electrode layer 16.
The Light Emitting layer 312 may be an Organic Light Emitting Diode (OLED) Light Emitting layer, and the Light Emitting layer 312 may further include at least one of a hole injection layer, a hole transport layer, an electron injection layer, or an electron transport layer according to design requirements of the Light Emitting structure.
In some embodiments, the first electrode 311 is a reflective electrode, and includes a first light-transmitting conductive layer, a reflective layer on the first light-transmitting conductive layer, and a second light-transmitting conductive layer on the reflective layer. The first and second transparent conductive layers may be ITO, indium zinc oxide, etc., and the reflective layer may be a metal layer, such as made of silver. The first electrode 311 may be an anode of the light emitting unit 31.
In some embodiments, the first electrode 311 is electrically connected to the third metal layer 133 by means of a via. The touch electrode layer 16 between the first electrode 311 and the third metal layer 133 may be perforated, and the via hole is insulated from the touch electrode layer 16.
In some embodiments, the second electrode 313 includes a magnesium silver alloy layer. In some embodiments, the second electrodes 313 may be interconnected as a common electrode. As shown in fig. 7 or 8, the second electrode 313 corresponding to the region between the adjacent light emitting layers 312 is a hollow structure. The second electrode 313 is designed to be a hollow structure, so that the problem that the cathode shields charges on a touch object (such as a finger) to cause that the touch position cannot be accurately identified can be avoided.
For example, the entire second electrode 313 may be prepared, and then the entire second electrode 313 may be patterned, so that the patterned second electrode 313 can completely cover the light emitting layers 312, and openings may be formed in the regions between the adjacent light emitting layers 312. The shape of the opening may be rectangular, elongated, circular, etc., which is not limited in the present invention.
In some optional embodiments, with continued reference to fig. 1, the touch electrode layer 16 may be insulated from the third metal layer 133 by the first planarization layer 151, and the display function layer 30 is insulated from the touch electrode layer 16 by the second planarization layer 152. The touch electrode layer 16 is insulated from the display function layer 30 and the third metal layer 133 by the planarization layer of the array substrate, and an additional insulating layer is not required, so that the process can be simplified.
In some optional embodiments, with continuing reference to fig. 1, the display function layer 30 further includes a pixel defining structure 32, the pixel defining structure 32 defines a plurality of opening regions K, the opening regions K may be arranged in an array, and the light emitting units 31 are disposed in the opening regions K in a one-to-one correspondence.
The embodiment of the invention also provides a display device, which comprises the display panel described in any one of the embodiments, and the display device can be applied to any product or component with a display function and a touch function, such as virtual reality equipment, a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator, a wearable watch, an internet of things node and the like. Since the principle of the display device to solve the problem is similar to that of the display panel, the display device can be implemented by the display panel, and repeated descriptions are omitted.
The embodiment of the present invention further provides a driving method of a display panel, which is used for driving the display panel 100 of any of the above embodiments. Fig. 9 is a flowchart illustrating a driving method of a display panel according to an embodiment of the present invention, and as shown in fig. 9, the driving method of the display panel includes the following steps:
the duration of the light-emitting stage is greater than that of the touch position detection stage, and in the touch position detection stage, the non-display state of the display panel cannot be identified by human eyes.
For example, the time of one frame may be set to 16.67ms, 2ms of the time may be selected as the touch position detection phase, and the remaining time is the light emitting phase. Of course, the duration of the two phases may also be adjusted appropriately according to the processing capability and display requirement of the control chip 20, and is not limited in detail here.
In some embodiments, the two phases are not sequential, and are performed alternately, when the display panel is in the touch position detection phase, the touch driving voltage is input to the touch electrode layer, and the touch position is determined according to the form of the self-capacitance electrode or the mutual capacitance electrode adopted by the touch electrode layer, or the capacitance change between the touch driving electrode and the touch sensing electrode of the touch electrode layer.
Taking the touch electrode layer of the display panel as a self-capacitance type, in step 110, a +5V touch driving voltage may be input to the touch electrode layer, and the input of the light emitting signal to the display function layer is blocked. In step 120, a touch driving voltage of 0V may be input to the touch electrode layer, and a light emitting signal is input to the display function layer, that is, a normal scan signal, a normal data signal, and the like are provided to the display function layer.
According to the driving method of the display panel provided by the embodiment of the invention, the display function is realized, the touch function is realized, and the duration of the light-emitting stage is set to be greater than the duration of the touch position detection stage, so that the non-display state of the display panel cannot be identified by human eyes in the touch position detection stage, and the use feeling of a user is prevented from being influenced.
As will be apparent to those skilled in the art, for convenience and brevity of description, the specific working processes of the systems, modules and units described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again. It should be understood that the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive various equivalent modifications or substitutions within the technical scope of the present invention, and these modifications or substitutions should be covered within the scope of the present invention.
It should also be noted that the exemplary embodiments mentioned in this patent describe some methods or systems based on a series of steps or devices. However, the present invention is not limited to the order of the above-described steps, that is, the steps may be performed in the order mentioned in the embodiments, may be performed in an order different from the order in the embodiments, or may be performed simultaneously.
Claims (10)
1. A display panel, comprising:
the array substrate comprises a first metal layer, a second metal layer and a third metal layer which are sequentially stacked and mutually insulated;
the touch electrode layer is arranged on one side, back to the second metal layer, of the third metal layer and is insulated from the third metal layer, and the touch electrode layer is electrically connected with the control chip through a touch lead;
and the display function layer is arranged on one side, back to the third metal layer, of the touch electrode layer and is insulated from the touch electrode layer.
2. The display panel according to claim 1, wherein the touch electrode layer comprises a plurality of touch electrode blocks arranged in an insulated manner, and each touch electrode block is electrically connected with the control chip through the touch lead.
3. The display panel according to claim 2, wherein the touch lead and the touch electrode block are disposed on the same layer;
or the touch lead is arranged between the third metal layer and the touch electrode layer and is insulated from the third metal layer and the touch electrode layer, and the touch lead is a metal lead.
4. The display panel according to claim 2 or 3, wherein the touch lead lines with the same length have the same line width, and the longer the length, the larger the line width of the touch lead lines.
5. The display panel according to claim 1, wherein the touch electrode layer comprises a touch driving electrode and a touch sensing electrode which are insulated from each other and have projections perpendicular to the display panel, the touch driving electrode is electrically connected to the touch driving lead through the touch driving lead, and the touch sensing electrode is electrically connected to the control chip through the touch sensing lead.
6. The display panel according to claim 5, wherein the touch driving electrodes and the touch sensing electrodes are both strip-shaped electrodes, and the touch driving electrodes and the touch sensing electrodes are disposed on different layers;
or, the touch-control drive electrode includes a plurality of drive electrode pieces that mutual electric connection, touch-control response electrode includes a plurality of response electrode pieces that mutual electric connection, drive electrode piece reaches response electrode piece is with the layer setting, just drive electrode piece reaches any one in the response electrode piece is through striding bridge mode electricity connection.
7. The display panel according to claim 1, wherein the display function layer comprises a plurality of light emitting units, each of the light emitting units comprises a first electrode, a light emitting layer, and a second electrode, which are stacked, the first electrode is located on a side of the light emitting layer facing the touch electrode layer, and the second electrode is located on a side of the light emitting layer facing away from the touch electrode layer;
the second electrode corresponding to the area between the adjacent light-emitting layers is of a hollow structure.
8. The display panel according to claim 7, wherein the touch electrode layer is insulated from the third metal layer by a first planarization layer, and the display function layer is insulated from the touch electrode layer by a second planarization layer;
the display function layer further comprises a pixel defining structure, the pixel defining structure defines a plurality of opening regions, and the light emitting units are arranged in the opening regions in a one-to-one correspondence mode.
9. A display device characterized by comprising the display panel according to any one of claims 1 to 8.
10. A driving method of a display panel, applied to the display panel according to any one of claims 1 to 8, the method comprising:
inputting a touch driving voltage to the touch electrode at a touch position detection stage within a frame time, and controlling the display panel to be in a non-display state;
inputting a light emitting signal to the display function layer in a light emitting stage within a frame time to enable the display panel to display preset image information;
the duration of the lighting stage is longer than that of the touch position detection stage, and human eyes cannot recognize the non-display state of the display panel in the touch position detection stage.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103677410A (en) * | 2013-12-02 | 2014-03-26 | 合肥京东方光电科技有限公司 | Touch base plate, touch screen and display device |
| CN107291295A (en) * | 2017-06-28 | 2017-10-24 | 武汉华星光电半导体显示技术有限公司 | A kind of embedded touch OLED display |
| CN108183121A (en) * | 2017-12-15 | 2018-06-19 | 武汉华星光电半导体显示技术有限公司 | Flexible display panels and preparation method thereof |
| CN109273481A (en) * | 2017-07-17 | 2019-01-25 | 上海和辉光电有限公司 | A kind of display panel and display device |
| CN109886140A (en) * | 2019-01-28 | 2019-06-14 | 上海天马有机发光显示技术有限公司 | Display panel and preparation method thereof and display device |
-
2020
- 2020-06-12 CN CN202010538295.3A patent/CN111831155A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103677410A (en) * | 2013-12-02 | 2014-03-26 | 合肥京东方光电科技有限公司 | Touch base plate, touch screen and display device |
| CN107291295A (en) * | 2017-06-28 | 2017-10-24 | 武汉华星光电半导体显示技术有限公司 | A kind of embedded touch OLED display |
| CN109273481A (en) * | 2017-07-17 | 2019-01-25 | 上海和辉光电有限公司 | A kind of display panel and display device |
| CN108183121A (en) * | 2017-12-15 | 2018-06-19 | 武汉华星光电半导体显示技术有限公司 | Flexible display panels and preparation method thereof |
| CN109886140A (en) * | 2019-01-28 | 2019-06-14 | 上海天马有机发光显示技术有限公司 | Display panel and preparation method thereof and display device |
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Application publication date: 20201027 |