CN110321030B - Display panel, driving method thereof and display device - Google Patents

Display panel, driving method thereof and display device Download PDF

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Publication number
CN110321030B
CN110321030B CN201910363640.1A CN201910363640A CN110321030B CN 110321030 B CN110321030 B CN 110321030B CN 201910363640 A CN201910363640 A CN 201910363640A CN 110321030 B CN110321030 B CN 110321030B
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Prior art keywords
display panel
layer
sub
touch
substrate
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CN110321030A (en
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林柏全
许祖钊
王臣
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Shanghai Tianma Microelectronics Co Ltd
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Shanghai Tianma Microelectronics Co Ltd
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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
    • 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
    • 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
    • G06F3/046—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by electromagnetic means

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Human Computer Interaction (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Position Input By Displaying (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

The invention discloses a display panel, a driving method thereof and a display device, which belong to the technical field of display, wherein the display panel comprises a substrate base plate, an array layer, at least one transparent conducting layer, a magneto-dielectric material layer and a metal conducting layer; a plurality of touch control units; the touch control unit comprises a first part, a second part and a third part, wherein the first part is positioned on the metal conducting layer, the second part is positioned on the magneto-dielectric material layer, and the third part is positioned on the transparent conducting layer; the first part and the third part are overlapped to form a detection capacitor in the direction vertical to the substrate base plate; the driving chip is electrically connected with the sub-pixels through the scanning lines and the data lines; the driving chip is electrically connected with the first part of the touch control unit through a signal wire. The invention can integrate the display function and the touch control detection function on one panel by using the same driving chip to provide the driving signal and the detection signal, and can simultaneously use the electromagnetic pen and the finger for touch control without developing a new driving chip, thereby not only having simple manufacturing process but also not increasing the manufacturing cost.

Description

Display panel, driving method thereof and display device
Technical Field
The invention relates to the technical field of display, in particular to a display panel, a driving method thereof and a display device.
Background
With the development of portable electronic display devices, a touch screen technology, which is a technology that determines inputted information according to the fact that when a finger, a pen, or the like contacts a touch screen mounted at the front end of a display, is detected, has gradually replaced a key technology as a mainstream technology of a mobile terminal or the like. At present, the application range of the touch screen is very wide, and main products comprise mobile terminals such as touch mobile phones, notebook computers and the like, man-machine display interfaces of industrial automation industry and the like. The touch technology provides a new man-machine interaction interface which is more direct and humanized in use, so that the touch technology is widely favored by the market.
Along with the development of touch technology, the touch technology and the flat panel display technology are integrated together to form a touch display device, so that the flat panel display device has a touch detection function, and input can be executed through fingers, electromagnetic pens and the like, so that the operation is more visual and simple. In the prior art, the method generally comprises an infrared touch technology, an electromagnetic touch technology and a capacitive touch technology. The principle of touch control by a finger and an electromagnetic pen is adopted, and then a requirement is put forward, namely, touch control by the electromagnetic pen and the finger is realized simultaneously. The touch screen using the infrared touch technology is divided into an infrared pair tube touch screen and an infrared imaging touch screen (commonly called an optical touch screen), infrared transmitting tubes and infrared receiving tubes are arranged on four sides of the infrared pair tube touch screen, an infrared matrix crossing horizontally and vertically is formed in one-to-one correspondence, when a user touches the touch screen, a touch object can block two infrared rays passing through the position horizontally and vertically, and then the position of a touch point can be judged through calculation by the controller. The basic principle of a touch screen using an electromagnetic touch technology is to judge by means of magnetic field changes generated by an electromagnetic pen and an inductor in the operation process, wherein the electromagnetic pen is a signal transmitting end, an antenna board is a signal receiving end, magnetic flux changes when approaching induction, and then position points are defined by operation. The touch screen using the capacitive touch technology is generally characterized in that long and narrow electrodes are plated on four sides of the touch screen, a low-voltage alternating-current field is formed in the touch screen, a transparent film layer belonging to metal conductive substances is covered on the touch screen, when a user touches the capacitive screen, fingers and a working surface form a coupling capacitor, when the user does not touch the capacitive screen, various electrodes are of the same potential, no current passes through the touch panel, when the user touches the touch panel, static electricity in the human body flows into the ground to generate weak current passing through, and the touch position can be calculated by the change of the current value of the detection electrode.
In order to achieve the thinness and light weight of the display panel, more and more products integrate display and touch on the same display panel, and integration of the touch unit and the display unit includes embedded and external hanging. Among them, the more commonly used touch technologies include a plug-in touch technology and an in-cell touch technology. In-cell touch technology is to integrate touch functions into a display panel, and is more focused because in-cell touch technology can make a display device lighter and thinner than in-cell touch technology. However, in the prior art, a general touch panel can only be touched by a finger or only by using an electromagnetic pen, and a touch panel capable of simultaneously using the electromagnetic pen touch and the finger touch cannot be provided. Therefore, the present invention provides a display panel capable of simultaneously implementing multiple touch modes without affecting normal display of the panel, further developing touch detection functions for thinning and lightening the display panel, and a driving method and a display device thereof without increasing manufacturing cost, which are technical problems to be solved by those skilled in the art.
Disclosure of Invention
In view of this, the present invention provides a display panel for solving the problems that the display panel in the prior art cannot use the electromagnetic pen touch control and the finger touch control at the same time, which is not beneficial to further thinning and light weight development of the display panel and is not beneficial to cost saving.
The present invention provides a display panel, comprising: the array substrate comprises a substrate base plate, an array layer, at least one transparent conducting layer, a magneto-dielectric material layer and a metal conducting layer; the array layer comprises an active layer, a grid metal layer and a source/drain metal layer; the array layer is positioned on the substrate, at least one transparent conducting layer is positioned on one side of the array layer far away from the substrate, the magneto-dielectric material layer is positioned on one side of the transparent conducting layer far away from the substrate, and the metal conducting layer is positioned on one side of the magneto-dielectric material layer far away from the substrate; the display panel further includes: a plurality of sub-pixels disposed on the substrate; a plurality of scan lines and a plurality of data lines electrically connected to the sub-pixels, respectively; the scanning lines and the data lines are insulated in a crossing mode to define areas where a plurality of sub-pixels are located; a plurality of touch control units; the touch control unit comprises a first part, a second part and a third part, wherein the first part is positioned on the metal conducting layer, the second part is positioned on the magneto-dielectric material layer, and the third part is positioned on the transparent conducting layer; the first part and the third part are overlapped to form a detection capacitor in the direction vertical to the substrate base plate; a driving chip; the driving chip is electrically connected with the sub-pixels through the scanning lines and the data lines; the driving chip is electrically connected with the first part of the touch control unit through a signal wire.
Based on the same idea, the invention also provides a display panel, comprising: the array substrate comprises a substrate base plate, an array layer, at least one transparent conducting layer, a magneto-dielectric material layer and a metal conducting layer; the array layer comprises an active layer, a grid metal layer and a source/drain metal layer; the array layer is positioned on the substrate, at least one transparent conducting layer is positioned on one side of the array layer far away from the substrate, the magneto-dielectric material layer is positioned on one side of the transparent conducting layer far away from the substrate, and the metal conducting layer is positioned on one side of the magneto-dielectric material layer far away from the substrate; the display panel further includes: a plurality of sub-pixels disposed on the substrate; a plurality of scan lines and a plurality of data lines electrically connected to the sub-pixels, respectively; the scanning lines and the data lines are insulated in a crossing mode to define areas where a plurality of sub-pixels are located; a plurality of sensing electrodes arranged in an array; the induction electrode is positioned on the metal conductive layer and is of a block-shaped structure; a plurality of driving electrodes extending in a first direction; the driving electrode is positioned on the transparent conductive layer and is in a strip-shaped structure; the orthographic projection of the plurality of sensing electrodes in the first direction on the substrate is overlapped with orthographic projection of one driving electrode on the substrate, and the driving electrode and the sensing electrode are overlapped to form a detection capacitor; a driving chip; the driving chip is electrically connected with the sub-pixels through the scanning lines and the data lines; the driving chip is electrically connected with the induction electrode through a signal wire.
Based on the same idea, the invention also provides a driving method of the display panel, which is applied to the display panel, and comprises the following steps: the touch control device comprises a display stage and a touch control stage, wherein the working time of the display stage is not overlapped with the working time of the touch control stage, and the touch control stage comprises a first touch control stage; in the display stage, the driving chip transmits driving signals to the sub-pixels through the scanning lines and the data lines to realize a display function; in the first touch stage, when the electromagnetic pen contacts the display panel, an external magnetic field changes, so that the magnetic dielectric constant of the magnetic dielectric material layer changes, the numerical value of the detection capacitor changes, and the driving chip receives a detection signal of the detection capacitor through a signal wire to realize a touch detection function; and/or the touch control stage comprises a second touch control stage, and in the second touch control stage, when the finger touches the display panel, a capacitor is formed between the finger and the metal conducting layer to cause the numerical variation of the detection capacitor, and the driving chip receives the detection signal of the detection capacitor through the signal wire to realize the touch control detection function.
Based on the same thought, the invention also provides a display device which comprises the display panel.
Compared with the prior art, the display panel, the driving method thereof and the display device provided by the invention have the advantages that at least the following effects are realized:
the display panel provided by the invention is provided with the array layer with the driving display function on the substrate, and further comprises the touch control unit with the touch control detection function, in the direction vertical to the substrate, the first part and the third part of the touch control unit are overlapped to form the detection capacitor, and the second part between the first part and the third part is a magnetic dielectric material layer, so that the magnetic dielectric material has rich magnetic properties, and has a magnetic dielectric effect, wherein the magnetic dielectric effect means that the dielectric constant of the material is changed after the direct current bias magnetic field is applied, therefore, the touch control unit in the invention can cause the dielectric constant to change when the external magnetic field is changed (optionally, the magnetic field caused by the touch control of an electromagnetic pen is changed), the capacitance value of the detection capacitor is formed by the first part and the third part in an overlapping way, and the touch control unit transmits a detection signal to the driving chip through a signal wire, so that the touch control detection function of the display panel is realized. Optionally, when the finger touches the display panel, a capacitance is formed between the finger and the metal conductive layer, so as to cause a numerical change of the detection capacitance, and the driving chip receives a detection signal of the detection capacitance through the signal line, so that a touch detection function can be realized. When the display panel is in a display stage, the same signals (for example, common voltage signals are applied to the first part and the third part of each touch control unit) are applied to the first part and the third part of each touch control unit through the signal lines, meanwhile, the driving chip provides scanning signals for each scanning line, each row of sub-pixels are sequentially scanned through the scanning lines, the control switch is turned on, data signals are provided for the data lines through the driving chip, the data signals are transmitted to the sub-pixels through the data lines, and finally, the whole display panel display picture is driven. The display panel can integrate the display function and the touch detection function of the display panel into one panel by using the same driving chip to provide the driving signal and the detection signal, and can multiplex the same touch structure on one panel to realize the purpose of simultaneously using the electromagnetic pen and the finger for touch control, thereby achieving the display effect and realizing two different touch control modes without developing new driving chips for touch control and display respectively, having simple manufacturing process and no increase of manufacturing cost, and being beneficial to further thinning and light weight development of the display panel.
Of course, it is not necessary for any one product to practice 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 plan view of a display panel according to an embodiment of the present invention;
FIG. 2 is a schematic view of a partial cross-sectional structure of one sub-pixel of FIG. 1;
FIG. 3 is a schematic plan view of another display panel according to an embodiment of the present invention;
fig. 4 is a schematic plan view of another display panel according to an embodiment of the present invention;
FIG. 5 is a schematic cross-sectional view taken along line A-A' of FIG. 4;
fig. 6 is a schematic cross-sectional view of a display panel according to an embodiment of the invention;
FIG. 7 is a schematic diagram showing another partial cross-sectional structure of a sub-pixel of a display panel according to an embodiment of the present invention;
FIG. 8 is a schematic diagram showing another partial cross-sectional structure of a sub-pixel of a display panel according to an embodiment of the present invention;
Fig. 9 is a schematic plan view of another display panel according to an embodiment of the present invention;
FIG. 10 is a schematic view of a partial cross-sectional structure of one sub-pixel of FIG. 9;
FIG. 11 is a block flow diagram of a method for driving a display panel according to an embodiment of the present invention;
fig. 12 is a timing chart of driving signals corresponding to a first portion and a third portion in a driving method of a display panel according to an embodiment of the present invention;
fig. 13 is a timing chart of driving signals corresponding to the driving electrodes and the sensing electrodes in the driving method of the display panel according to the embodiment of the invention;
fig. 14 is a schematic structural diagram of a display device according to an embodiment of the present invention.
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.
Referring to fig. 1 and 2, fig. 1 is a schematic plan view of a display panel 000 according to an embodiment of the present invention, fig. 2 is a schematic partial cross-sectional view of a sub-pixel in fig. 1 (since the first portion 701 and the second portion 702 of the touch unit 70 have the same area in a direction perpendicular to the substrate 10, only the first portion 701 can be shown in fig. 1, and it can be understood that the second portion 702 is located below the first portion 701), and the display panel 000 according to the embodiment includes: a substrate base 10 (not filled in fig. 1), an array layer 20, at least one transparent conductive layer 30, a layer of magneto-dielectric material 40, a metallic conductive layer 50; the array layer 20 includes an active layer 201, a gate metal layer 202, and a source/drain metal layer 203 (it should be noted that, in this embodiment, only a film structure included in the display panel is schematically illustrated, and when implemented, the display panel may further include other film structures, for example, each insulating layer, etc., which can be understood by those skilled in the art according to the existing structure of the display panel);
The array layer 20 is positioned on the substrate 10, at least one transparent conductive layer 30 is positioned on one side of the array layer 20 away from the substrate 10, the magneto-dielectric material layer 40 is positioned on one side of the transparent conductive layer 30 away from the substrate 10, and the metal conductive layer 50 is positioned on one side of the magneto-dielectric material layer 40 away from the substrate 10;
the display panel 000 further includes:
a plurality of sub-pixels 60 disposed on the substrate base 10;
a plurality of scan lines G and a plurality of data lines S electrically connected to the sub-pixels 60, respectively; the scan lines G and the data lines S cross and insulate to define areas where the plurality of sub-pixels 60 are located;
a plurality of touch units 70; the touch unit 70 includes a first portion 701, a second portion 702, and a third portion 703, where the first portion 701 is located on the metal conductive layer 50, the second portion 702 is located on the magneto-dielectric material layer 40, and the third portion 703 is located on the transparent conductive layer 30; the first portion 701 and the third portion 703 overlap to form a detection capacitance C in a direction perpendicular to the substrate base plate 10;
a driving chip 80; the driving chip 80 is electrically connected with the sub-pixels 60 through the scan lines G and the data lines S; the driving chip 80 is electrically connected to the first portion 701 of the touch unit 70 through the signal line 90.
Specifically, the display panel 000 provided in this embodiment includes, in addition to the array layer 20 having a driving display function on the substrate 10, a touch unit 70 having a touch detection function, where the touch unit 70 is disposed through the transparent conductive layer 30 (alternatively, the transparent conductive layer 30 may be a common electrode layer or a pixel electrode layer for realizing the display function, and may be disposed according to actual selection in specific implementation), the magneto-dielectric material layer 40, and the metal conductive layer 50, The first portion 701 of the touch unit 70 is located on the metal conductive layer 50, the second portion 702 is located on the magneto-dielectric material layer 40, and the third portion 703 is located on the transparent conductive layer 30; in the direction perpendicular to the substrate 10, the first portion 701 and the third portion 703 overlap to form a detection capacitor C, and since the second portion 702 between the first portion 701 and the third portion 703 is the magneto-dielectric material layer 40, the magneto-dielectric material has rich magnetic properties including magnetization curve, magneto-optical property, magneto-electric property, magneto-dielectric property, and the like, and thus has a magneto-dielectric effect that the dielectric constant of the material changes after the application of a dc bias magnetic field, the magneto-dielectric effect is also referred to as a magnetic capacitance effect, and the magnitude of the magneto-dielectric effect is measured by the magneto-dielectric coefficient, that isEpsilon in the above r (H) Represents the relative dielectric constant epsilon of the magneto-dielectric material under the action of an external magnetic field r (0) The relative permittivity of the magneto-dielectric material in the absence of an applied magnetic field is shown. The following relationship exists between capacitance and dielectric constant: />C in the formula P 、ε 0 、ε r S, d are capacitance, vacuum dielectric constant, relative dielectric constant, cross-sectional area of sample, and thickness of sample, respectively, and it is known that the applied magnetic field causes a change in the relative dielectric constant, i.e., a capacitance C P Is a variation of (c). Therefore, the touch unit 70 in this embodiment may cause a dielectric constant change when an external magnetic field changes (optionally, a magnetic field change caused by an electromagnetic pen touch), the capacitance value of the detection capacitor C formed by overlapping the first portion 701 and the third portion 703 changes, and the touch unit 70 transmits a detection signal to the driving chip 80 through the signal line 90 via the first portion 701, so as to implement a touch detection function of the display panel.
The driving chip 80 of the present embodiment is electrically connected to the sub-pixels 60 through the scan lines G and the data lines S, and optionally, each sub-pixel 60 is electrically connected to the corresponding data line S through a control switch (a switch transistor located in the array layer 20); the driving chip 80 is electrically connected to the first portion 701 of the touch unit 70 through the signal line 90, and optionally, each touch unit 70 may correspond to a plurality of sub-pixels 60 (as shown in fig. 1). When the display panel is in the display stage, the same signals (e.g., common voltage signals are applied to both the first portion 701 and the third portion 703 of each touch unit 70) are applied to the signal lines 90, and the driving chip 80 provides the scanning signals to each scanning line G, and each row of sub-pixels 60 is sequentially scanned by the scanning lines G, so that the control switch is turned on, and the driving chip 80 provides the data signals to the data lines S, and the data signals are transmitted to the sub-pixels 60 through the data lines S, so as to finally drive the whole display panel to display the picture. When the display panel is in the touch stage, the driving chip 80 stops the scan signal and the data signal inputted to the scan line G and the data line S, i.e. disconnects the scan line G and the data line S from the sub-pixels 60, and simultaneously provides the touch detection signal to the first portion 701 of each touch unit 70 through the signal line 90, when the user touches the display panel 000 through the electromagnetic pen, the external magnetic field changes, so that the magnetic dielectric constant of the magneto-dielectric material layer 40 changes, causing the value of the detection capacitor C to change, and the driving chip 80 receives the detection signal of the detection capacitor C through the signal line 90, thereby sensing the touch position of the electromagnetic pen on the display panel 000 and realizing the touch detection function. Alternatively, when the finger touches the display panel 000, a capacitance is formed between the finger and the metal conductive layer 50, causing a change in the value of the detection capacitance C, and the driving chip 80 may also implement a touch detection function by receiving a detection signal of the detection capacitance C through the signal line 90. Therefore, the display panel 000 of this embodiment can integrate the display function and the touch detection function on one panel, and can also multiplex the same touch structure on one panel to achieve the purpose of simultaneously using the electromagnetic pen and the finger for touch control, so that two different touch control modes can be achieved while the display effect is achieved, and a new driving chip is not required to be developed for touch control and display respectively, so that the manufacturing process is simple, the manufacturing cost is not increased, and the display panel is beneficial to further thin and lightweight development.
It should be noted that, the magneto-dielectric material layer 40 of this embodiment may be formed into a specific pattern on the transparent conductive layer 30 of the display panel 000 by magnetron sputtering with a ceramic target material, so as to form the second portion 702 of the touch unit 70, and the magnetron sputtering coating is a novel physical vapor deposition method, that is, electrons are emitted and focused on the material to be sputtered by using an electron gun system, so that the sputtered atoms fly away from the material to the substrate to deposit and form a film with higher kinetic energy according to the momentum conversion principle, and the material to be sputtered is called a sputtering target material, which is generally metal, alloy, ceramic compound, or the like. However, the technical solution of the present application is not limited to this process, but may be other processes, and the embodiment is not specifically limited. One touch unit 70 of the present embodiment may correspond to a plurality of sub-pixels 60, so that excessive occupation of display space by the signal lines 90 can be avoided, and the problem that the accuracy of one touch unit 70 corresponding to one sub-pixel 60 is too high and the process is difficult to realize can be avoided. In this embodiment, only the touch unit is illustrated to include the first portion 701, the second portion 702, and the third portion 703, where the number of the first portion 701 may be one (not illustrated in fig. 1) or may be multiple (as illustrated in fig. 1), the first portion 701 of one touch unit 70 is connected to the same electric signal and needs to be disposed at a position on the display panel 000 that does not affect the display effect, and the third portion 703 is located on the transparent conductive layer 30, so that the common electrode layer or the pixel electrode layer in the display panel 000 can be reused, and when the common electrode layer is reused, the third portion 703 of all the touch units 70 may be an integral (as illustrated in fig. 1, where the pixel electrode of the sub-pixel 60 is located below the common electrode layer, and for clarity, illustrated by a transparent dashed box in fig. 1) or may be a block structure divided by the touch units 70, as illustrated in fig. 3, and fig. 3 is a schematic plan view of another display panel 000 provided by the embodiment of the present invention; when the pixel electrode layer is multiplexed, the third portion 703 of the touch unit 70 may have a block structure (not illustrated in the drawings) divided by the sub-pixel 60, and in any of the above embodiments, only the detection capacitance C formed by overlapping the first portion 701 and the second portion 703 needs to be satisfied, and the capacitance value also changes correspondingly when the magnetic dielectric constant of the second portion 702 changes, so that the signal line 90 connected through the first portion 701 can implement touch detection through the driving chip 80, which is not described in detail in this embodiment.
In some alternative embodiments, please refer to fig. 4 and 5, fig. 4 is a schematic plan view of another display panel 000 according to an embodiment of the present invention, and fig. 5 is a schematic sectional view along A-A' in fig. 4, in which the sub-pixel 60 includes: a thin film transistor 601 and a pixel electrode 602, wherein a gate electrode of the thin film transistor 601 is electrically connected to the scanning line G, a source electrode of the thin film transistor 601 is electrically connected to the data line S, and a drain electrode of the thin film transistor 601 is electrically connected to the pixel electrode 602; the pixel electrode 602 is located on the transparent conductive layer 30, the gate electrode and the scan line G of the thin film transistor 601 are both located on the gate metal layer 202, the source electrode and the drain electrode of the thin film transistor 601 and the data line S are both located on the source/drain metal layer 203, and the silicon island of the thin film transistor 601 is located on the active layer 201.
In this embodiment, the sub-pixel 60 includes the thin film transistor 601 and the pixel electrode 602, where the pixel electrode 602 is located in the transparent conductive layer 30 (in this case, the transparent conductive layer 30 may be one layer, as shown in fig. 4 and 5, or may be two layers, in which case, one layer is used as a common electrode layer, and the other layer is used as a pixel electrode layer, as shown in fig. 1 and 2), and since the third portion 703 of the touch unit 70 is also located in the transparent conductive layer 30, the third portion 703 of the touch unit 70 may multiplex the transparent conductive layer 30 where the pixel electrode 602 is located, that is, the third portion 703 of the touch unit 70 may be a block structure divided in units of sub-pixel 60, so that the first portion 701 and the second portion 703 overlap to form a detection capacitor C, and when the magnetic dielectric constant of the second portion 702 changes when the display panel is in the touch stage, the value of the detection capacitor C also changes accordingly, so that the touch detection is implemented by the driving chip 80 through the signal line 90 connected to the first portion 701.
It should be noted that, in the touch stage of the present embodiment, the third portion 703 of the touch unit 70, that is, each pixel electrode 602, may all input the same potential signal, or may not all access the potential signal, and only the first portion 701 of the touch unit 70 needs to access the touch detection signal through the signal line 90 to implement the touch detection function, and in the display stage, the first portion 701 of the touch unit 70 accesses the same potential signal as the pixel electrode layer, that is, the transparent conductive layer where the third portion 703 of the touch unit 70 is located, and may be selectively set according to practical situations when implementing.
In some alternative embodiments, please continue to refer to fig. 1 and 2, in this embodiment, at least one transparent conductive layer 30 includes a first transparent conductive layer 301 and a second transparent conductive layer 302 insulated from each other, the pixel electrode 602 is located on the first transparent conductive layer 301, the third portion 703 is located on the second transparent conductive layer 302, and the second transparent conductive layer 302 is connected to a common potential.
The present embodiment further defines that at least one transparent conductive layer 30 includes a first transparent conductive layer and a second transparent conductive layer that are insulated from each other, where the pixel electrode 602 is located in the first transparent conductive layer 301, the third portion 703 is located in the second transparent conductive layer 302, the second transparent conductive layer 302 is connected to a common potential, when the display panel is in a display stage, the first portion 701 (the metal conductive layer 50) and the third portion 703 (the second transparent conductive layer 302) of each touch unit 70 are connected to the same common potential through the signal line 90, and simultaneously, the driving chip 80 provides a scan signal to each scan line G, and scans each row of sub-pixels 60 sequentially through the scan line G, so that the thin film transistor 601 of each sub-pixel 60 is turned on, and provides a data signal to the data line S through the driving chip 80, and transmits the data signal to the pixel electrode 602 of the sub-pixel 60 through the data line S, so as to finally drive the whole display panel to display the picture. When the display panel is in the touch stage, the driving chip 80 stops the scan signal and the data signal inputted to the scan line G and the data line S, i.e. disconnects the scan line G and the data line S from the sub-pixels 60, and simultaneously provides the touch detection signal to the first portion 701 of each touch unit 70 through the signal line 90, when the user touches the display panel 000 through the electromagnetic pen, the external magnetic field changes, so that the magnetic dielectric constant of the magneto-dielectric material layer 40 changes, causing the value of the detection capacitor C to change, and the driving chip 80 receives the detection signal of the detection capacitor C through the signal line 90, thereby sensing the touch position of the electromagnetic pen on the display panel 000 and realizing the touch detection function.
The at least one transparent conductive layer 30 of the present embodiment includes a first transparent conductive layer 301 and a second transparent conductive layer 302 that are insulated from each other, so that the third portion 703 can be located on the second transparent conductive layer 302, and the second transparent conductive layer 302 is connected to a common potential, so that the third portion of the touch unit 70 can be integrally connected to the same potential signal, and further, the process flow can be simplified while the display function and the touch detection function are implemented on one panel.
In some alternative embodiments, please continue to refer to fig. 1 and 2, in this embodiment, the area of the orthographic projection of the first portion 701 of each touch unit 70 onto the substrate 10 is smaller than the area of the orthographic projection of the sub-pixel 60 onto the substrate 10;
the touch unit 70 includes a plurality of first portions 701 electrically connected to each other, and each first portion 701 corresponds to one sub-pixel 60;
the first portions 701 corresponding to the different touch units 70 are insulated from each other.
The present embodiment further defines that the area of the orthographic projection of the first portion 701 of each touch unit 70 to the substrate 10 is smaller than the area of the orthographic projection of the sub-pixel 60 to the substrate 10, so that the first portion 701 can be made as small as possible, i.e. the first portion 701 can be disposed at a position that does not affect the display effect of the display panel 000, and the display quality of the display panel 000 is further enhanced while the touch detection function is implemented. Since the area of the orthographic projection of the first portion 701 of each touch unit 70 to the substrate 10 is smaller than the area of the orthographic projection of the sub-pixel 60 to the substrate 10, in order to avoid that the area of the first portion 701 is too small to cause the detection signal to be too weak, in this embodiment, one touch unit 70 is further provided with a plurality of first portions 701 and the first portions 701 of one touch unit 70 are electrically connected with each other, that is, the access signals of the first portions 701 in one touch unit 70 are the same, so that the total area of the first portions 701 of each touch unit 70 can be enhanced, and thus the intensity of the touch detection signal is enhanced, and optionally, each first portion 701 corresponds to one sub-pixel 60, that is, one first portion 701 is provided within the range of each sub-pixel 60. The present embodiment further defines that the first portions 701 corresponding to the different touch units 70 are insulated from each other, so that signals between adjacent touch units 70 can be kept from interfering with each other, thereby further improving the touch detection effect of the display panel 000.
In some alternative embodiments, please continue to refer to fig. 3, in this embodiment, the third portions 703 corresponding to the different touch units 70 are insulated from each other.
The embodiment further explains that the third portions 703 corresponding to the different touch units 70 may be insulated from each other, so that the first portion 701 of the touch unit 70 may be used as an induction signal end, the third portion 703 of the different touch units 70 may be connected to a detection signal through the signal line 90, and used as a detection signal end, so that when a user touches the display panel 000 through the electromagnetic pen, an external magnetic field changes, the magnetic dielectric constant of the magneto-dielectric material layer 40 changes, the value of the detection capacitor C changes, and the driving chip 80 receives the detection signal of the detection capacitor C through the signal line 90, thereby sensing the touch position of the electromagnetic pen on the display panel 000, and realizing the touch detection function.
In some alternative embodiments, referring to fig. 6, fig. 6 is a schematic cross-sectional structure of a display panel according to an embodiment of the present invention, in which the display panel 000 further includes a backlight source 100, a liquid crystal layer 200, and a color film substrate 300, the backlight source 100 is located at a side of the substrate 10 away from the array layer 20, the liquid crystal layer 200 is located at a side of the transparent conductive layer 30 away from the substrate 10, and the color film substrate 300 is located at a side of the liquid crystal layer 200 away from the substrate 10;
The color film substrate 300 includes a black matrix 3001 and a plurality of color resists 3002 arranged in an array, and orthographic projections of the first portion 701, the second portion 702, and the signal lines 90 (not illustrated in the drawings) to the substrate 10 are located within a range of orthographic projections of the black matrix 3001 to the substrate 10.
The present embodiment further illustrates that when the display panel 000 is a transmissive liquid crystal display panel, the principle of displaying images on the transmissive liquid crystal display panel is generally that the liquid crystal layer 200 is driven by an electric field to cause an electric field effect of twisted nematic of liquid crystal molecules, so as to control light transmission or shielding of the backlight 100, and the color film substrate 300 acts to make the display panel display color images. Therefore, the transmissive liquid crystal display panel needs to have better transmittance so as to ensure better display quality. Since the first portion 701, the second portion 702 and the signal line 90 are made of opaque materials, the orthographic projection of the first portion 701, the second portion 702 and the signal line 90 to the substrate 10 is set within the orthographic projection range of the black matrix 3001 to the substrate 10, so that the decrease of the transmittance of the display panel can be avoided, and a better display effect can be achieved.
In some alternative embodiments, please refer to fig. 7, fig. 7 is a schematic diagram illustrating another partial cross-sectional structure of a sub-pixel of a display panel according to an embodiment of the present invention, in this embodiment, a metal conductive layer 50 in a range of a touch unit 70 in the display panel is a first sub-metal portion 501, a metal conductive layer 50 in a range other than the touch unit 70 is a second sub-metal portion 502, and the first sub-metal portion 501 and the second sub-metal portion 502 are two structures separated from each other and insulated from each other;
The transparent conductive layer 30 within the range of the touch unit 70 is a first sub-transparent conductive portion 3011, the transparent conductive layer 30 within the range outside the touch unit 70 is a second sub-transparent conductive portion 3012, and the first sub-transparent conductive portion 3011 and the second sub-transparent conductive portion 3012 have two mutually separated and mutually insulated structures;
the second sub-transparent conductive portion 3012 is electrically connected to the second sub-metal portion 502.
The present embodiment further illustrates that the metal conductive layer 30 of the display panel can be used as a reflective layer in the display panel, in addition to the first portion 701 of the touch unit 70, for reflecting light, and the reflective display panel achieves display by reflecting ambient light incident into the reflective display panel, and since the reflective display panel does not need to be additionally provided with a backlight module to provide backlight for its display, the reflective display panel has been widely paid attention and applied. In order to realize the touch and display functions of the reflective display panel of this embodiment, the first sub-metal portion 501 in the range of the touch unit 70 and the second sub-metal portion 502 in the range other than the touch unit 70 in the display panel are set to be two structures separated from each other and insulated from each other, the first sub-transparent conductive portion 3011 in the range of the corresponding touch unit 70 and the second sub-transparent conductive portion 3012 in the range other than the touch unit 70 are also set to be two structures separated from each other and insulated from each other, so that the first sub-metal portion 501 (i.e., the first portion 701 of the touch unit 70) and the first sub-transparent conductive portion 3011 (i.e., the second portion 702 of the touch unit 70) overlap in the touch unit 70 to form a detection capacitor C, when a user touches the display panel 000 with an electromagnetic pen, the external magnetic field changes, the magnetic permittivity of the magnetic dielectric material layer 40 between the first sub-metal portion 501 and the first sub-transparent conductive portion 3011 changes, causing the value of the detection capacitor C to change, and then the driving chip 80 receives the detection capacitor C through the signal line 90 to detect the detection capacitor C, thereby realizing the touch and display function of the touch position on the touch panel.
In some alternative embodiments, referring to fig. 8, fig. 8 is a schematic view of another partial cross-sectional structure of a sub-pixel of a display panel according to an embodiment of the invention, and in this embodiment, an insulating layer 1100 (not filled in the figure) is disposed between the second sub-transparent conductive portion 3012 and the second sub-metal portion 502, and the second sub-transparent conductive portion 3012 and the second sub-metal portion 502 are electrically connected by a via hole.
The present embodiment further explains that when the first sub-metal portion 501 in the range of the touch unit 70 and the second sub-metal portion 502 in the range other than the touch unit 70 in the display panel are provided in two structures separated from each other and insulated from each other, the first sub-transparent conductive portion 3011 in the range of the corresponding touch unit 70 and the second sub-transparent conductive portion 3012 in the range other than the touch unit 70 are also provided in two structures separated from each other and insulated from each other, that is, the metal conductive layer 30 of the display panel can be used as a reflective layer in the display panel in addition to the first portion 701 of the touch unit 70, and when light is reflected, the first sub-metal portion 501 (i.e., the first portion 701) and the first sub-transparent conductive portion 3011 (i.e., the third portion 703) in the range of the touch unit 70 are provided with the second portion 702 being the magneto-dielectric material layer 40, and the second sub-metal portion 502 and the second sub-transparent conductive portion 3012 out of the range of the touch unit 70 are electrically connected to each other, so that the problem of non-uniformity of thickness of the case easily occurs. In order to solve the problem of the uniformity of the thickness of the case, the insulating layer 1100 is disposed between the second sub-transparent conductive portion 3012 and the second sub-metal portion 502, the insulating layer 1100 is used to compensate for the level difference caused by the second portion 702 in the touch unit 70, so as to further enhance the uniformity of the thickness of the case, and the second sub-transparent conductive portion 3012 and the second sub-metal portion 502 are electrically connected by a via hole, so that the second sub-metal portion 502 used as a reflective layer and the second sub-transparent conductive portion 3012 used as a pixel electrode layer are electrically connected, thereby realizing the display function of the display panel.
In some alternative embodiments, please continue to refer to fig. 8, in this embodiment, the thickness H1 of the insulating layer 1100 is the same as the thickness H2 of the magneto-dielectric material layer 40.
The thickness H1 of the insulating layer 1100 disposed between the second sub-transparent conductive portion 3012 and the second sub-metal portion 502 is further defined in this embodiment and is the same as the thickness H2 of the magneto-dielectric material layer 40, so that the thickness of the insulating layer 1100 can be further ensured to compensate for the step difference caused by the second portion 702 (i.e., the magneto-dielectric material layer 40) in the touch unit 70, and the effect of uniform thickness of the box can be further ensured.
In some alternative embodiments, referring to fig. 1-8, in this embodiment, the material of the metal conductive layer 50 is any one of gold, silver, and copper, and the material of the magneto-dielectric material layer 40 is any one of a manganite system, a perovskite system, and a rare earth iron garnet system.
The present embodiment further illustrates that the material of the metal conductive layer 50 is any one of gold, silver, and copper, because gold, silver, and copper are all metal materials and have good conductive properties. The material of the magneto-dielectric material layer 40 is any one of a manganite system, a perovskite system and a rare earth iron garnet system, and it should be noted that the material of the metal conductive layer 50 and the material of the magneto-dielectric material layer 40 are only exemplified in this embodiment, but not limited to the above materials, but may be other materials which are well known to those skilled in the art and can achieve the same function, and the description of this embodiment is omitted.
In some alternative embodiments, please refer to fig. 9 and 10, fig. 9 is a schematic plan view of another display panel provided in the embodiment of the present invention, fig. 10 is a schematic partial cross-sectional view of one sub-pixel in fig. 9, and a display panel 000 provided in the embodiment includes: a substrate base plate 10, an array layer 20, at least one transparent conductive layer 30, a magneto-dielectric material layer 40 and a metal conductive layer 50; the array layer 20 includes an active layer 201, a gate metal layer 202, and a source/drain metal layer 203;
the array layer 20 is positioned on the substrate 10, at least one transparent conductive layer 30 is positioned on one side of the array layer 20 away from the substrate 10, the magneto-dielectric material layer 40 is positioned on one side of the transparent conductive layer 30 away from the substrate 10, and the metal conductive layer 50 is positioned on one side of the magneto-dielectric material layer 40 away from the substrate 10;
the display panel 000 further includes:
a plurality of sub-pixels 60 disposed on the substrate base 10;
a plurality of scan lines G and a plurality of data lines S electrically connected to the sub-pixels 60, respectively; the scan lines G and the data lines S cross and insulate to define areas where the plurality of sub-pixels 60 are located;
a plurality of sensing electrodes RX arranged in an array; the induction electrode RX is positioned on the metal conductive layer 50, and the induction electrode RX is of a block-shaped structure;
A plurality of driving electrodes TX extending in a first direction X; the driving electrode TX is positioned on the transparent conductive layer 30, and the driving electrode TX is in a strip-shaped structure; the orthographic projection of a plurality of sensing electrodes RX in a first direction X onto a substrate 10 overlaps with orthographic projection of one driving electrode TX onto the substrate 10, and the driving electrode TX and the sensing electrode RX overlap to form a detection capacitor C;
a driving chip 80; the driving chip 80 is electrically connected with the sub-pixels 60 through the scan lines G and the data lines S; the driving chip 80 is electrically connected to the sensing electrode RX through a signal line 90 (for clarity of illustration, the signal line 90 to which the sensing electrode RX is connected in fig. 9 is not illustrated as being electrically connected to the driving chip 80 in its entirety).
The display panel provided in this embodiment is a mutual capacitive touch display panel, and generally the touch display panel is divided into four types of resistive, capacitive, optical and acoustic wave types according to different sensing technologies, and currently, the main touch technology is capacitive, and the principle of the capacitive touch technology is to use sensing electrodes to detect the change of the detection capacitance of the touch point, and to utilize signal lines connected with the electrodes to feed back the detection signals to complete touch positioning, wherein the capacitive type is divided into self-capacitive type and mutual capacitive type.
The touch principle of mutual capacitive touch in this embodiment is that a detection capacitor C is formed at a position where the sensing electrode RX and the driving electrode TX overlap, that is, the sensing electrode RX and the driving electrode TX respectively form two poles of the detection capacitor C. When a finger touches the display panel, the coupling between the sensing electrode RX and the driving electrode TX near the touch point is affected, thereby changing the capacitance between the two electrodes. When touch detection is specifically realized, the driving electrodes TX sequentially send detection signals, the sensing electrodes RX simultaneously receive signals, so that the size of a detection capacitor C of the intersection point of all the driving electrodes TX and the sensing electrodes RX, namely the size of a capacitor of a two-dimensional plane of the whole display panel, can calculate the coordinate of each touch point according to the two-dimensional capacitance variation data on the display panel, and can calculate the real coordinate of each touch point even if a plurality of touch points exist on the display panel.
When a finger touches the display panel, the display panel 000 of the present embodiment forms a capacitance between the finger and the sensing electrode RX, which causes a change in the value of the detection capacitance C, and the driving chip 80 receives a detection signal of the detection capacitance C through the signal line 90 to implement a touch detection function. The display panel provided in this embodiment can realize the touch detection function (refer to the detailed description of the above embodiment specifically), and meanwhile, the mutual capacitance touch detection function can be realized by the slight change of the transparent conductive layer 30 (the entire design of the transparent conductive layer 30 is changed to the design of dividing the transparent conductive layer 30 into a plurality of driving electrodes TX extending along the first direction X, as shown in fig. 9, at this time, in order to reduce the wiring on the display panel, the display effect of the display panel is prevented from being affected by the excessive signal lines 90, the transparent conductive layer 30 in the range corresponding to the multiple rows of sub-pixels is used as an integral strip driving electrode TX, and the plurality of block sensing electrodes RX in the range are connected with the same signal lines 90), so that the mutual capacitance touch detection function is realized.
It should be noted that, in the illustration of the present embodiment, the first direction X is the same as the extending direction of the scan line G, but is merely illustrative, but not limited to this direction, and may be other directions, for example, may be the extending direction of the data line S, and it is only required that the driving electrode TX has a stripe structure extending along one direction and overlaps the sensing electrode RX, which is not limited to this embodiment.
In some alternative embodiments, please refer to fig. 1-11, fig. 11 is a block flow diagram of a driving method of a display panel 000 according to an embodiment of the present invention, and the driving method of the display panel 000 according to the present embodiment can be applied to the display panel 000 in any of the above embodiments, where the driving method of the display panel 000 according to the present embodiment includes:
the display stage T1 and the touch stage T2, wherein the working time of the display stage T1 and the working time of the touch stage T2 are not overlapped, and the touch stage T2 comprises a first touch stage T21;
in the display stage T1, the driving chip 80 transmits driving signals to the sub-pixels 60 through the scan lines G and the data lines S to realize a display function;
in the first touch stage T21, when the electromagnetic pen contacts the display panel 000, the external magnetic field changes, so that the magnetic dielectric constant of the magnetic dielectric material layer 40 changes, and the value of the detection capacitor C changes, and the driving chip 80 receives the detection signal of the detection capacitor C through the signal line 90 to realize a touch detection function;
And/or the touch stage T2 includes a second touch stage T22, and in the second touch stage T22, when the finger touches the display panel 000, a capacitance is formed between the finger and the metal conductive layer 50, so as to cause a value change of the detection capacitance C, and the driving chip 80 receives a detection signal of the detection capacitance C through the signal line 90 to implement a touch detection function.
The embodiment further explains that the driving method of the display panel may include two working phases, namely a display phase and a touch phase, and the working time of the display phase and the working time of the touch phase do not overlap.
In the display stage T1, the driving chip 80 transmits driving signals to the sub-pixels 60 through the scan lines G and the data lines S to realize a display function; the method comprises the following steps: when the display panel is in the display stage T1, the same signals (e.g., common voltage signals are applied to both the first portion 701 and the third portion 703 of each touch unit 70) are applied to the signal line 90, and the driving chip 80 simultaneously provides the scanning signals to each scanning line G, sequentially scans each row of the sub-pixels 60 through the scanning lines G, turns on the control switch, provides the data signals to the data line S through the driving chip 80, transmits the data signals to the sub-pixels 60 through the data line S, and finally drives the whole display panel to display a picture.
The touch stage T2 includes a first touch stage T21 and/or a second touch stage T22;
when the display panel is in the first touch stage T21, the external magnetic field changes when the electromagnetic pen contacts the display panel 000, so that the magnetic dielectric constant of the magnetic dielectric material layer 40 changes, and the value of the detection capacitor C changes, and the driving chip 80 receives the detection signal of the detection capacitor C through the signal line 90 to realize a touch detection function; the method comprises the following steps: the driving chip 80 stops the scan signal and the data signal inputted to the scan line G and the data line S, i.e., disconnects the scan line G and the data line S from the electrical connection of each sub-pixel 60, and simultaneously provides a touch detection signal to the first portion 701 of each touch unit 70 through the signal line 90, when a user touches the display panel 000 through the electromagnetic pen, the external magnetic field changes, the magneto-dielectric constant of the magneto-dielectric material layer 40 changes, the value of the detection capacitor C changes, and the driving chip 80 receives the detection signal of the detection capacitor C through the signal line 90, thereby sensing the touch position of the electromagnetic pen on the display panel 000 and realizing the touch detection function.
When the display panel is in the second touch stage T22 and the finger touches the display panel 000, a capacitance is formed between the finger and the metal conductive layer 50, causing a change in the value of the detection capacitance C, and the driving chip 80 receives a detection signal of the detection capacitance C through the signal line 90 to implement a touch detection function; the method comprises the following steps: when a finger touches the display panel, the coupling between the sensing electrode RX and the driving electrode TX near the touch point is affected, thereby changing the capacitance between the two electrodes. When touch detection is specifically realized, the driving electrodes TX sequentially send detection signals, the sensing electrodes RX simultaneously receive signals, so that the size of a detection capacitor C of all the junction points of the driving electrodes TX and the sensing electrodes RX, namely the size of a capacitor of a two-dimensional plane of the whole display panel, can calculate the coordinate of each touch point according to the two-dimensional capacitance variation data on the display panel, and can calculate the real coordinate of each touch point even if a plurality of touch points exist on the display panel, thereby realizing the function of capacitive touch detection.
According to the driving method of the display panel, the driving signal and the detection signal can be provided by using the same driving chip 80, so that the display function and the touch detection function of the display panel are integrated on one panel, and the purpose of simultaneously using the electromagnetic pen and the finger for touch control can be achieved by multiplexing the same touch control structure on one panel, so that the display effect is achieved, two different touch control modes can be achieved at the same time, a new driving chip is not required to be developed for touch control and display respectively, the manufacturing process is simple, the manufacturing cost is not increased, and the display panel is favorable for further thinning and light weight development.
In some alternative embodiments, please refer to fig. 1-8, 11 and 12, fig. 12 is a timing chart of driving signals corresponding to the first portion 701 and the third portion 703 in a driving method of a display panel according to an embodiment of the present invention, in this embodiment,
in the display stage T1, the first portion 701 and the third portion 703 of the touch unit 70 are connected to the common electric potential signal Vcom;
in the touch stage T2, the third portion 703 of the touch unit 70 keeps being connected to the common potential signal Vcom, and the first portion 701 is connected to the pulse signal.
The present embodiment further illustrates that in the driving method of the display panel provided in the foregoing embodiment, in the display stage T1 and the touch stage T2, the first portion 701 and the third portion 703 of the touch unit 70 respectively correspond to the accessed potential signals, specifically, in the display stage T1, the transparent conductive layer 30 where the third portion 703 is located is multiplexed into the common electrode layer, and meanwhile, the driving chip 80 provides the scanning signals to the scanning lines G, scans the sub-pixels 60 of each row sequentially through the scanning lines G, makes the control switch open, provides the data signals to the data lines S through the driving chip 80, transmits the data signals to the sub-pixels 60 through the data lines S, and finally drives the display screen of the whole display panel. The first portion 701 and the third portion 703 of the touch unit 70 are connected to the common electric potential signal Vcom, so that two electrode signals of the detection capacitor C are consistent, the detection capacitor C does not need to receive or output the detection signal, and the display panel 000 is used as display at this time.
In the touch stage T2 (first touch stage T21), the third portion 703 of the touch unit 70 is kept connected to the common potential signal Vcom, and the input signal is not required to be replaced, and only the first portion 701 of the touch unit 70 is connected to the pulse signal through the driving chip 80 and the signal line 90, when a user touches the display panel 000 through the electromagnetic pen, the external magnetic field changes, the magnetic dielectric constant of the magneto-dielectric material layer 40 changes, the value of the detection capacitor C changes, the driving chip 80 receives the detection signal of the detection capacitor C through the signal line 90, and accordingly the touch position of the electromagnetic pen on the display panel 000 is sensed, and the touch detection function is realized.
It should be noted that, alternatively, the pulse signal in this embodiment may be a high-frequency pulse signal. The pulse signal is a discrete signal, has various shapes, and is characterized in that waveforms are discontinuous on a time axis (there is a significant interval between waveforms) but have a certain periodicity compared with a common analog signal (such as a sine wave). The most common pulse wave is a rectangular wave (i.e., a square wave, as shown in fig. 12), but is not limited to the one shown in fig. 12, but may be other pulse signals.
In some alternative embodiments, please refer to fig. 9-11 and fig. 13, fig. 13 is a timing chart of driving signals corresponding to the driving electrodes TX and the sensing electrodes RX in a driving method of a display panel according to an embodiment of the present invention, in this embodiment,
In the display stage T1, the driving electrode TX and the sensing electrode RX are connected to a common potential signal Vcom;
in the touch stage T2, the driving electrode TX is connected to the pulse signal, and each sensing electrode RX inputs the same signal or no signal.
The present embodiment further illustrates that in the driving method of the display panel provided in the foregoing embodiment, in the display stage T1, the driving electrode TX and the sensing electrode RX of the touch unit 70 are respectively connected to the potential signals correspondingly, specifically, in the display stage T1, the transparent conductive layer 30 where the driving electrode TX is located is multiplexed into a common electrode layer, meanwhile, the driving chip 80 provides the scanning signals to the scanning lines G, the scanning lines G sequentially scan the rows of the sub-pixels 60, so that the control switch is turned on, the driving chip 80 provides the data signals to the data lines S, the data signals are transmitted to the sub-pixels 60 through the data lines S, and finally the whole display panel is driven to display the picture. The driving electrode TX and the sensing electrode RX are connected to the common potential signal Vcom, so that two electrode signals of a detection capacitor C formed by overlapping the driving electrode TX and the sensing electrode RX are consistent, the detection capacitor C does not need to receive or output a detection signal, and the display panel 000 is used for display at this time.
In the touch stage T2 (the second touch stage T22), each sensing electrode RX inputs the same signal (for example, the common potential signal Vcom is kept) or no signal is input, no replacement or other signals are needed, only the driving electrode TX at the moment is connected with a pulse signal through the driving chip 80 and the signal line 90, when a finger touches the display panel, coupling between the sensing electrode RX and the driving electrode TX near the touch point is affected, the driving electrode TX sequentially sends out the pulse signal for detection, the sensing electrode RX simultaneously receives the signal, and therefore the size of a detection capacitor C of the junction point of all the driving electrodes TX and the sensing electrode RX, namely, the capacity of a two-dimensional plane of the whole display panel can be obtained, and the coordinate of each touch point can be calculated according to the two-dimensional capacity variation data on the display panel.
It should be noted that, alternatively, the pulse signal in this embodiment may be a high-frequency pulse signal. The pulse signal is a discrete signal, has various shapes, and is characterized in that waveforms are discontinuous on a time axis (there is a significant interval between waveforms) but have a certain periodicity compared with a common analog signal (such as a sine wave). The most common pulse wave is a rectangular wave (i.e., a square wave, as shown in fig. 12), but is not limited to the one shown in fig. 13, but may be other pulse signals.
In some alternative embodiments, please refer to fig. 14, fig. 14 is a schematic structural diagram of a display device 111 according to an embodiment of the present invention, where the display device 111 according to the present embodiment includes a display panel 000 according to the above embodiment of the present invention. The embodiment of fig. 14 is only an example of a mobile phone, and the display device 111 is described, and it is to be understood that the display device 111 provided in the embodiment of the present invention may be other display devices 111 having a display function, such as a computer, a television, and a vehicle-mounted display device, which is not particularly limited in the present invention. The display device 111 provided in the embodiment of the present invention has the beneficial effects of the display panel 000 provided in the embodiment of the present invention, and the specific description of the display panel 000 in the above embodiments may be referred to specifically, and this embodiment is not repeated here.
As can be seen from the above embodiments, the display panel, the driving method thereof and the display device provided by the invention at least realize the following beneficial effects:
the display panel provided by the invention is provided with the array layer with the driving display function on the substrate, and further comprises the touch control unit with the touch control detection function, in the direction vertical to the substrate, the first part and the third part of the touch control unit are overlapped to form the detection capacitor, and the second part between the first part and the third part is a magnetic dielectric material layer, so that the magnetic dielectric material has rich magnetic properties, and has a magnetic dielectric effect, wherein the magnetic dielectric effect means that the dielectric constant of the material is changed after the direct current bias magnetic field is applied, therefore, the touch control unit in the invention can cause the dielectric constant to change when the external magnetic field is changed (optionally, the magnetic field caused by the touch control of an electromagnetic pen is changed), the capacitance value of the detection capacitor is formed by the first part and the third part in an overlapping way, and the touch control unit transmits a detection signal to the driving chip through a signal wire, so that the touch control detection function of the display panel is realized. When the display panel is in a display stage, the same signals (for example, common voltage signals are applied to the first part and the third part of each touch control unit) are applied to the first part and the third part of each touch control unit through the signal lines, meanwhile, the driving chip provides scanning signals for each scanning line, each row of sub-pixels are sequentially scanned through the scanning lines, the control switch is turned on, data signals are provided for the data lines through the driving chip, the data signals are transmitted to the sub-pixels through the data lines, and finally, the whole display panel display picture is driven. The display panel can integrate the display function and the touch detection function of the display panel on one panel by using the same driving chip to provide the driving signal and the detection signal, and can multiplex the same touch structure on one panel to realize the purpose of simultaneously using the electromagnetic pen and the finger for touch control, so that the display effect is achieved, two different touch control modes can be realized at the same time, a new driving chip is not required to be developed for touch control and display respectively, the manufacturing process is simple, the manufacturing cost is not increased, and the display panel is favorable for further thinning and light weight development.
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 (15)

1. A display panel, comprising: the array substrate comprises a substrate base plate, an array layer, at least one transparent conducting layer, a magneto-dielectric material layer and a metal conducting layer; the array layer comprises an active layer, a grid metal layer and a source/drain metal layer;
the array layer is positioned on the substrate, the at least one transparent conducting layer is positioned on one side of the array layer away from the substrate, the magneto-dielectric material layer is positioned on one side of the transparent conducting layer away from the substrate, and the metal conducting layer is positioned on one side of the magneto-dielectric material layer away from the substrate;
the display panel further includes:
a plurality of sub-pixels disposed on the substrate base plate;
a plurality of scan lines and a plurality of data lines electrically connected to the sub-pixels, respectively; the scanning lines and the data lines are crossed and insulated to define areas where a plurality of sub-pixels are located;
A plurality of touch control units; the touch unit comprises a first part, a second part and a third part, wherein the first part is positioned on the metal conducting layer, the second part is positioned on the magneto-dielectric material layer, and the third part is positioned on the transparent conducting layer; the first part and the third part overlap to form a detection capacitor in a direction perpendicular to the substrate base plate;
a driving chip; the driving chip is electrically connected with the sub-pixels through the scanning lines and the data lines; the driving chip is electrically connected with the first part of the touch control unit through a signal wire;
the display panel comprises a display stage and a touch control stage, and the working time of the display stage is not overlapped with the working time of the touch control stage;
in the display stage, the driving chip transmits driving signals to the sub-pixels through the scanning lines and the data lines to realize a display function;
the touch control stage comprises a first touch control stage, wherein in the first touch control stage, when an electromagnetic pen contacts the display panel, an external magnetic field changes, so that the magnetic dielectric constant of the magnetic dielectric material layer changes to cause the numerical value of the detection capacitor to change, and the driving chip receives a detection signal of the detection capacitor through the signal wire to realize a touch control detection function;
And/or the touch control stage comprises a second touch control stage, when a finger touches the display panel in the second touch control stage, a capacitor is formed between the finger and the metal conductive layer to cause the numerical value of the detection capacitor to change, and the driving chip receives the detection signal of the detection capacitor through the signal wire to realize a touch control detection function.
2. The display panel of claim 1, wherein the display panel comprises,
the sub-pixel includes: a thin film transistor and a pixel electrode, wherein the grid electrode of the thin film transistor is electrically connected with the scanning line, the source electrode of the thin film transistor is electrically connected with the data line, and the drain electrode of the thin film transistor is electrically connected with the pixel electrode; the pixel electrode is located on the transparent conductive layer, the grid electrode of the thin film transistor and the scanning line are both located on the grid electrode metal layer, the source electrode and the drain electrode of the thin film transistor and the data line are both located on the source/drain electrode metal layer, and the silicon island of the thin film transistor is located on the active layer.
3. The display panel of claim 2, wherein the display panel comprises,
the at least one transparent conductive layer comprises a first transparent conductive layer and a second transparent conductive layer which are mutually insulated, the pixel electrode is positioned on the first transparent conductive layer, the third part is positioned on the second transparent conductive layer, and the second transparent conductive layer is connected with a common potential.
4. A display panel according to claim 3, wherein the area of orthographic projection of the first portion of each touch unit onto the substrate is smaller than the area of orthographic projection of the sub-pixel onto the substrate;
one touch unit comprises a plurality of first parts which are electrically connected with each other, and each first part corresponds to one sub-pixel;
the first parts corresponding to the different touch units are mutually insulated.
5. A display panel according to claim 3, wherein the third portions corresponding to different touch units are insulated from each other.
6. The display panel of claim 1, wherein the display panel comprises,
the display panel further comprises a backlight source, a liquid crystal layer and a color film substrate, wherein the backlight source is positioned on one side of the substrate far away from the array layer, the liquid crystal layer is positioned on one side of the transparent conductive layer far away from the substrate, and the color film substrate is positioned on one side of the liquid crystal layer far away from the substrate;
the color film substrate comprises a black matrix and a plurality of color resistors arranged in an array mode, and orthographic projection of the first part, the second part and the signal line to the substrate is located in the range of orthographic projection of the black matrix to the substrate.
7. The display panel of claim 1, wherein the display panel comprises,
the metal conductive layer in the range of the touch unit is a first sub-metal part, the metal conductive layer in the range outside the touch unit is a second sub-metal part, and the first sub-metal part and the second sub-metal part are two mutually separated and mutually insulated structures;
the transparent conductive layer in the range of the touch unit is a first sub-transparent conductive part, the transparent conductive layer in the range outside the touch unit is a second sub-transparent conductive part, and the first sub-transparent conductive part and the second sub-transparent conductive part are two mutually separated and mutually insulated structures;
the second sub-transparent conductive portion is electrically connected to the second sub-metal portion.
8. The display panel according to claim 7, wherein an insulating layer is provided between the second sub-transparent conductive portion and the second sub-metal portion, and the second sub-transparent conductive portion and the second sub-metal portion are electrically connected through a via hole.
9. The display panel of claim 8, wherein a thickness of the insulating layer is the same as a thickness of the magneto-dielectric material layer.
10. The display panel according to claim 1, wherein the material of the metal conductive layer is any one of gold, silver, and copper, and the material of the magneto-dielectric material layer is any one of a manganite system, a perovskite system, and a rare earth iron garnet system.
11. A display panel, comprising: the array substrate comprises a substrate base plate, an array layer, at least one transparent conducting layer, a magneto-dielectric material layer and a metal conducting layer; the array layer comprises an active layer, a grid metal layer and a source/drain metal layer;
the array layer is positioned on the substrate, the at least one transparent conducting layer is positioned on one side of the array layer away from the substrate, the magneto-dielectric material layer is positioned on one side of the transparent conducting layer away from the substrate, and the metal conducting layer is positioned on one side of the magneto-dielectric material layer away from the substrate;
the display panel further includes:
a plurality of sub-pixels disposed on the substrate base plate;
a plurality of scan lines and a plurality of data lines electrically connected to the sub-pixels, respectively; the scanning lines and the data lines are crossed and insulated to define areas where a plurality of sub-pixels are located;
A plurality of sensing electrodes arranged in an array; the induction electrode is positioned on the metal conductive layer, and the induction electrode is of a block structure;
a plurality of driving electrodes extending in a first direction; the driving electrode is positioned on the transparent conductive layer and is in a strip-shaped structure; orthographic projections of the plurality of sensing electrodes in the first direction on the substrate are overlapped with orthographic projections of one driving electrode on the substrate, and the driving electrode and the sensing electrode are overlapped to form a detection capacitor;
a driving chip; the driving chip is electrically connected with the sub-pixels through the scanning lines and the data lines; the driving chip is electrically connected with the induction electrode through a signal wire;
the display panel comprises a display stage and a touch control stage, and the working time of the display stage is not overlapped with the working time of the touch control stage;
in the display stage, the driving chip transmits driving signals to the sub-pixels through the scanning lines and the data lines to realize a display function;
the touch control stage comprises a first touch control stage, wherein in the first touch control stage, when an electromagnetic pen contacts the display panel, an external magnetic field changes, so that the magnetic dielectric constant of the magnetic dielectric material layer changes to cause the numerical value of the detection capacitor to change, and the driving chip receives a detection signal of the detection capacitor through the signal wire to realize a touch control detection function;
And/or the touch control stage comprises a second touch control stage, when a finger touches the display panel in the second touch control stage, a capacitor is formed between the finger and the metal conductive layer to cause the numerical value of the detection capacitor to change, and the driving chip receives the detection signal of the detection capacitor through the signal wire to realize a touch control detection function.
12. A driving method of a display panel, characterized in that the driving method is applied to the display panel of any one of claims 1 to 11.
13. The method of driving a display panel according to claim 12, wherein,
in the display stage, the first part and the third part of the touch control unit are connected with a common potential signal;
in the touch stage, the third part of the touch unit keeps access to the common potential signal, and the first part is accessed to the pulse signal.
14. The method of driving a display panel according to claim 12, wherein,
in the display stage, the driving electrode and the sensing electrode are connected with a common potential signal;
in the touch stage, the driving electrodes are connected with pulse signals, and each sensing electrode inputs the same signals or does not input signals.
15. A display device comprising the display panel of any one of claims 1-11.
CN201910363640.1A 2019-04-30 2019-04-30 Display panel, driving method thereof and display device Active CN110321030B (en)

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