Display panel and touch control method thereof

Abstract

The present application discloses a display panel and a touch control method thereof, wherein the display panel includes: a touch display substrate, a tactile feedback substrate and an actuator; the tactile feedback substrate and the actuator are located on the same side and / or opposite sides of the touch display substrate, and the tactile feedback substrate is located on the display side of the touch display substrate; the tactile feedback substrate is used to generate electrostatic tactile feedback, and the actuator is used to generate vibration tactile feedback. The display panel itself can realize electrostatic tactile feedback and vibration tactile feedback without external electrostatic tactile feedback components and vibration tactile feedback components. Therefore, electronic equipment using the display panel of the present application does not need to separately set up electrostatic tactile feedback components and vibration tactile feedback components, so it can meet its demand for development in the direction of lightness and thinness.

Description

Technical Field

[0001] The present invention generally relates to the field of display technology, and in particular to a display panel and a touch control method thereof. Background Art

[0002] The touch display screen can provide users with a more direct operating experience. Users can operate, input data, and control the device with the touch display screen by touching the touch display screen.

[0003] However, since the user operates directly on the touch display screen, there is a lack of tactile feedback. In order to solve this problem, most devices with touch display screens are currently equipped with eccentric motors. When touching, the eccentric motor works to provide tactile feedback in the form of certain vibrations. However, with the advancement of real technology and the demand for electronic devices, especially mobile electronic devices (such as mobile phones, tablet computers, etc.) to develop in the direction of lightness and thinness, the use of eccentric motors for touch tactile feedback can no longer meet the needs of technological development. Summary of the invention

[0004] The present application aims to provide a display panel and a touch control method thereof, which are used to solve the problem in the prior art that tactile feedback is performed through an eccentric motor, which is not conducive to the development of electronic devices towards being lighter and thinner.

[0005] In a first aspect, the present invention provides a display panel, comprising: a touch display substrate, a tactile feedback substrate and an actuator;

[0006] The tactile feedback substrate and the actuator are located on the same side and / or opposite sides of the touch display substrate, and the tactile feedback substrate is located on the display side of the touch display substrate;

[0007] The tactile feedback substrate is used to generate electrostatic tactile feedback, and the actuator is used to generate vibration tactile feedback.

[0008] As an implementable manner, the touch display substrate includes a touch circuit layer, and the touch circuit layer includes a receiving electrode layer, a first insulating layer, and a driving electrode layer which are stacked in sequence;

[0009] The receiving electrode layer includes a plurality of receiving electrodes arranged in parallel and at intervals;

[0010] The driving electrode layer includes a plurality of driving electrodes arranged in parallel and at intervals;

[0011] The receiving electrodes are arranged crosswise with the driving electrodes.

[0012] As an implementable manner, the tactile feedback substrate includes a tactile electrode layer and an insulating protection layer stacked in sequence;

[0013] The tactile electrode layer includes a plurality of tactile electrodes arranged in parallel and at intervals, the tactile electrodes are arranged in parallel with the driving electrodes, and the tactile electrode layer and the receiving electrode layer are arranged on both sides of the driving electrode layer; or,

[0014] The tactile electrode layer includes a grid electrode as a tactile electrode. The tactile electrode layer and the receiving electrode layer are disposed on both sides of the driving electrode layer. The hollow area of ​​the grid electrode is 80%-90% of the hollow area formed by the cross-arranged receiving electrodes and the driving electrodes.

[0015] As an implementable manner, in a projection direction perpendicular to a display surface of the touch display substrate, the tactile electrode and the driving electrode at least partially overlap.

[0016] As an implementable manner, the touch display substrate includes a touch circuit layer, and the touch circuit layer includes a receiving electrode layer, a first insulating layer, and a driving electrode layer which are stacked in sequence;

[0017] The driving electrode layer includes a grid electrode as a driving electrode;

[0018] The tactile feedback substrate comprises a tactile electrode layer and an insulating protection layer which are stacked in sequence;

[0019] The tactile electrode layer includes a transparent surface electrode as a tactile electrode;

[0020] The electrode overlap area between the grid electrode and the transparent surface electrode is greater than or equal to 60%;

[0021] Alternatively, the touch display substrate comprises a touch circuit layer, and the touch circuit layer comprises a receiving electrode layer, a first insulating layer and a driving electrode layer which are stacked in sequence;

[0022] The driving electrode layer includes driving electrodes;

[0023] The tactile feedback substrate comprises a tactile electrode layer and an insulating protection layer which are stacked in sequence;

[0024] The tactile electrode layer includes tactile electrodes;

[0025] The driving electrodes and the tactile electrodes are both grid electrodes, and an overlapping area between the driving electrodes and the tactile electrodes is greater than or equal to 80%.

[0026] As an implementable manner, the total area of ​​the actuators accounts for 5%-30% of the total area of ​​the display panel; or; the arrangement density of the actuators is 5-50 per square millimeter.

[0027] As an implementable manner, the touch display substrate includes a display area and a non-display area located around the display area;

[0028] The tactile feedback substrate and the actuator are located on the same side of the touch display substrate, and the actuator is located in the non-display area.

[0029] As an implementable manner, the display panel is a foldable or rollable display panel, and the distance between the actuator and the bending center axis of the display panel is 15um-500um.

[0030] As an achievable method, the touch display substrate includes a display area and a non-display area located around the display area, and a display middle frame located around the non-display area, the display middle frame is provided with a sound-emitting device or a vibrating device, and the actuator is provided on the inner side of the display middle frame, and the distance between the actuator and the sound-emitting device or the vibrating device is 15um-50cm.

[0031] In a second aspect, the present invention provides a touch control method for the display panel as described above, comprising the following steps:

[0032] Acquire a touch gesture for touching the display panel;

[0033] According to the correspondence between the touch gesture and the tactile feedback type, the actuator is controlled to vibrate and / or the touch driving voltage of the touch display substrate is increased, so that the tactile feedback substrate generates electrostatic tactile feedback.

[0034] The above scheme, by setting a tactile feedback substrate and an actuator in the display panel, wherein the tactile feedback substrate can generate electrostatic tactile feedback, and the actuator can generate vibration tactile feedback. That is, the display panel itself can realize electrostatic tactile feedback and vibration tactile feedback, without the need for external electrostatic tactile feedback components and vibration tactile feedback components. Therefore, electronic equipment using the display panel of the present application does not need to separately set up electrostatic tactile feedback components and vibration tactile feedback components, so it can meet its demand for development in the direction of lightness and thinness. In addition, since the scheme of the present application can realize both electrostatic tactile feedback and vibration tactile feedback, it can bring richer tactile feedback effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0036] Figure 1 A schematic diagram of the structure of a display panel provided by an embodiment of the present invention;

[0037] Figure 2A top view showing receiving electrodes, driving electrodes and tactile electrodes provided in an embodiment of the present invention;

[0038] Figure 3 A top view of a display panel provided by an embodiment of the present invention;

[0039] Figure 4 A bottom view of a display panel provided by an embodiment of the present invention;

[0040] Figure 5 A bottom view of a display panel provided by another embodiment of the present invention;

[0041] Figure 6 A bottom view of a display panel provided in yet another embodiment of the present invention;

[0042] Figure 7 A flow chart of a touch control method provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0043] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant invention, rather than to limit the invention. It is also necessary to explain that, for ease of description, only the parts related to the invention are shown in the accompanying drawings.

[0044] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0045] like Figure 1 As shown, a display panel shown in an embodiment of the present invention includes: a touch display substrate 3, a tactile feedback substrate 7 and an actuator 1;

[0046] The touch display substrate 3 mentioned here refers to a display substrate with a touch function, wherein the touch function can adopt a capacitive touch solution, and a mutual capacitance capacitive touch solution can be preferred; the display substrate is, for example but not limited to, an LCD (Liquid Crystal Display) display panel, an OLED (Organic Light Emitting Diode) display panel, and a QLED (Quantum Dot Light Emitting Diodes) display panel.

[0047] The touch display substrate 3 may be a rigid display substrate or a flexible display substrate.

[0048] In this example, the touch display substrate 3 takes an OLED display panel with a touch function as an example, which includes a TFT (Thin Film Transistor) backplane 31, an anode layer 32, a light-emitting layer 33, a cathode layer 34, a packaging layer 35 and a touch circuit layer 36, which are stacked in sequence. Here, according to actual needs, there may be other structures in each layer and between each layer, which are not illustrated here one by one. The light-emitting layer 33 includes a plurality of pixels, each pixel includes a plurality of sub-pixels of different colors, such as red sub-pixels, blue sub-pixels and green sub-pixels, etc. Each sub-pixel may include a hole injection layer, a hole transport layer, an electroluminescent layer, an electron injection layer and an electron transport layer, etc.

[0049] The tactile feedback substrate 7 and the actuator 1 are located on the same side and / or opposite sides of the touch display substrate 3, and the tactile feedback substrate 7 is located on the display side of the touch display substrate 3; that is, the tactile feedback substrate 7 and the actuator 1 can both be located on the display side of the touch display substrate 3; or, the tactile feedback substrate 7 is located on the display side of the touch display substrate 3, and the actuator 1 is located on the back side of the touch display substrate 3, where the back side refers to the side opposite to the display side of the touch display substrate 3; it can also be that the tactile feedback substrate 7 is provided on the display side of the touch display substrate 3, and the actuator 1 is provided, and the actuator 1 is also provided on the back side of the touch display substrate 3.

[0050] For example, but not limited to, the actuator 1 can be directly attached or directly filmed and patterned to form on the back of the display substrate, such as the back of a glass backplane or a plastic substrate. The actuator 1 can also be attached or filmed on the metal support plate 2 of the OLED display. When applied to a foldable display, the actuator 1 should be located away from the folding center.

[0051] The tactile feedback substrate 7 is used to generate electrostatic tactile feedback to achieve the purpose of texture feedback, that is, the tactile feedback substrate 7 can generate static electricity of different sizes so that the user's fingers 8 can feel electrostatic attraction of different strengths, so that the user's fingers 8 can feel different surface friction forces when touching the display panel, thereby achieving the distinction of pattern contours and textures; the actuator 1 is used to generate vibration tactile feedback.

[0052] The actuator 1 is, for example but not limited to, a piezoelectric ceramic piece. By applying different alternating signals to the piezoelectric ceramic piece, the piezoelectric ceramic piece will bend and deform, thereby generating a vibration effect.

[0053] The above scheme, by setting a tactile feedback substrate 7 and an actuator 1 in the display panel, wherein the tactile feedback substrate 7 can generate electrostatic tactile feedback, and the actuator 1 can generate vibration tactile feedback. That is, the display panel itself can realize electrostatic tactile feedback and vibration tactile feedback without the need for external electrostatic tactile feedback components and vibration tactile feedback components. Therefore, the electronic device using the display panel of the present application does not need to separately set up electrostatic tactile feedback components and vibration tactile feedback components, so it can meet its demand for development in the direction of lightness and thinness. In addition, since the scheme of the present application can realize both electrostatic tactile feedback and vibration tactile feedback, it can bring richer tactile feedback effects.

[0054] As an implementable manner, the touch display substrate 3 includes a touch circuit layer 36, and the touch circuit layer 36 includes a receiving electrode layer, a first insulating layer 362 and a driving electrode layer which are stacked in sequence;

[0055] The receiving electrode layer includes a plurality of receiving electrodes 361 arranged in parallel and at intervals;

[0056] The driving electrode layer includes a plurality of driving electrodes 363 arranged in parallel and at intervals;

[0057] The receiving electrodes 361 and the driving electrodes 363 are arranged crosswise.

[0058] When working, the operating frequency range of the actuator 1 can be tens to hundreds of hertz, such as but not limited to scanning at frequencies of 50Hz, 100Hz, 200Hz, and 300Hz. Optionally, the display panel also includes an actuator frequency conversion control circuit to control the switching of the actuator frequency. For example: the actuator frequency conversion control circuit can switch between 300Hz and 50HZ. The operating frequency of the driving electrode 363 when performing touch position detection is tens of thousands to hundreds of thousands of hertz, such as but not limited to scanning at frequencies of 20KHz, 50KHz, 100KHz, and 200KHz. Its voltage range is several to tens of volts. The operating frequency of the driving electrode 363 when realizing the tactile function is several thousand to tens of thousands of hertz, for example, but not limited to 5KHz, 10KHz, 20KHz, 30KHz, 40KHz, and the driving electrodes 363 are scanned, and the driving waveform voltage amplitude ranges from tens to two hundred volts, for example, but not limited to 50V, 100V, 120V, 150V, 200V. It is detected whether the capacitance value at the intersection of the receiving electrode 361 and the driving electrode 363 changes to determine whether it is touched and the touched position. After the touch position is determined, high-voltage driving is performed to generate tactile feedback.

[0059] As an implementable method, see also Figure 2As shown, the tactile feedback substrate 7 includes a tactile electrode layer and an insulating protection layer 72 which are stacked in sequence;

[0060] The tactile electrode layer includes a plurality of tactile electrodes 71 arranged in parallel and at intervals, the tactile electrodes 71 are arranged in parallel with the driving electrodes 363, and the tactile electrode layer and the receiving electrode layer are arranged on both sides of the driving electrode layer. With this structure, when performing electrostatic tactile feedback, the change in voltage on the driving electrode 363 will induce static electricity of different magnitudes on the tactile electrode 71, so that the user can feel different surface friction forces. For example, but not limited to, the patterns of the driving electrode 363, the receiving electrode 361 and the tactile electrode 71 can be strips, or diamonds, snowflakes, crosses, etc. It is not limited to the electrode shape, and it only needs to satisfy that the tactile electrode 71 and the driving electrode 363 are arranged in parallel, and the overlapping area is greater than or equal to 50% and less than or equal to 100%.

[0061] For example: when the driving electrode 363 is a grid electrode integrated in the display panel (for example, it can be a metal grid electrode), when the on-cell tactile electrode 71 uses a transparent surface electrode, the electrode overlapping area should be greater than or equal to 60%, that is, the hollow area of ​​the grid electrode is less than or equal to 40% of the transparent surface electrode; specifically, the driving electrode 363 is a metal grid electrode integrated in the display panel.

[0062] Optionally, when the tactile electrode 71 also uses a metal mesh electrode, the electrode overlap area should be greater than or equal to 80%.

[0063] It can be understood that the area of ​​the metal / transparent mesh electrode is calculated based on its pattern as a surface electrode equivalent.

[0064] Optionally, when the tactile electrode 71 can be a grid electrode, the area of ​​the hollow portion formed by the grid electrode is smaller than the area of ​​the hollow portion formed by the receiving electrode 361 and the driving electrode 363 to ensure the overlap of the tactile electrode 71 and the driving electrode 363, and then when performing electrostatic tactile feedback, the change in voltage on the driving electrode 363 will induce static electricity of different magnitudes on the tactile electrode 71, so that the user can feel different surface friction. Preferably, when the tactile electrode 71 is a grid electrode, the area of ​​its hollow portion is 80%-90% of the area of ​​the hollow portion formed by the receiving electrode 361 and the driving electrode 363.

[0065] The driving electrode 363, the receiving electrode 361, and the tactile electrode 71 can be transparent electrodes, such as indium tin oxide (ITO), indium zinc oxide (IZO), silver nanowire (SNW), conductive polymer (PEDOT), etc., or metal grid electrodes, such as copper (Cu) and its alloys, silver (Ag) and its alloys, titanium / aluminum / titanium (Ti / Al / Ti), molybdenum, molybdenum / aluminum / molybdenum (Mo / Al / Mo), etc. The metal grid can be directly made on the display light-emitting material encapsulation layer 35, or it can be made separately and attached to the display panel.

[0066] As an implementable manner, in the projection direction perpendicular to the display surface of the touch display substrate 3, the tactile electrode 71 at least partially overlaps with the driving electrode 363. Generally, when the voltage applied to the driving electrode 363 is constant, the amount of static electricity generated on the tactile electrode 71 is positively correlated with the amount of overlap between the tactile electrode 71 and the driving electrode 363, that is, when the voltage applied to the driving electrode 363 is constant, the higher the amount of overlap between the tactile electrode 71 and the driving electrode 363, the greater the amount of static electricity generated on the tactile electrode 71, and the stronger the electrostatic attraction generated thereby.

[0067] Preferably, the overlap between the tactile electrode 71 and the driving electrode 363 is increased as much as possible.

[0068] As an achievable method, Figure 3 As shown, the touch display substrate 3 includes a display area AA, a non-display area BB located around the display area AA, and a display middle frame CC located around the non-display area BB;

[0069] The tactile feedback substrate 7 and the actuator 1 are located on the same side of the touch display substrate 3, and the actuator 1 is located in the non-display area BB. The actuator 1 is located in the non-display area BB, which can prevent the actuator 1 from blocking the light emitted by the sub-pixel. In addition, by being arranged in the non-display area BB, there can be enough space to arrange the actuator 1 as large as possible to provide vibration of sufficient intensity.

[0070] As an implementable manner, the touch display substrate 3 includes a display area AA and a non-display area BB located around the display area AA;

[0071] The tactile feedback substrate 7 and the actuator 1 are disposed on opposite sides of the touch display substrate 3, such as the actuator 1 is disposed on the back of the substrate, and the actuator 1 is at least disposed in the display area AA. On the one hand, the actuator 1 can be prevented from blocking the light emitted by the sub-pixel, and on the other hand, the touch operation is generally performed in the display area AA, and the actuator 1 is disposed in the display area AA, so that the user can feel the vibration tactile feedback more directly.

[0072] As an implementable manner, in order to improve the vibration effect of the vibration feedback, a metal support plate 2 is provided on the back of the touch display substrate 3, and the actuator 1 is fixedly provided on the side of the metal support plate 2 away from the touch display substrate 3. The metal support plate 2 can enhance the vibration emitted by the actuator 1 to a certain extent.

[0073] The material of the metal support plate 2 is, for example but not limited to, SUS stainless steel.

[0074] The actuator 1 array can also be attached to the inner side of the display frame CC as a way to implement tactile feedback of side buttons, such as realizing vibration feedback of the power button, volume button, etc. of the mobile phone.

[0075] For example, the actuator 1 can be set at a distance of 15um-50cm from the sound-emitting device or the vibrating device of the display device, so as to achieve better tactile feedback. For example, the sound-emitting device of the display device can be a power button, a volume button, etc. of a mobile terminal (mobile phone, PAD, watch, etc.). The sound-emitting device can be set on the display frame CC, for example.

[0076] As an implementable manner, a plurality of the actuators 1 are disposed on the metal support plate 2, and the plurality of the actuators 1 are arranged regularly. The regular arrangement mentioned here refers to an arrangement according to a predetermined rule; for example but not limited to, Figure 4 As shown, two rows of actuators 1 can be provided, and the two rows of actuators 1 are symmetrically arranged; Figure 5 As shown, four rows of actuators 1 can be provided, and the number of actuators on the middle two sides is less than the number on the two sides, as shown in FIG. Figure 6 As shown, the actuators 1 can also be evenly arranged in a matrix. The arrangement here is only an example and is not a limitation on the arrangement. Of course, other forms of arrangement can also be used. In addition, the shapes of the actuators 1 on the same display panel can be the same or different; the shape of the actuator 1 can be circular, square, oval, etc. The size of the actuator is not limited, for example, it can be 3 mm to 7 mm in diameter, or 2.5 mm to 6 mm in side length. Of course, it can also be set according to demand.

[0077] The number and position of the lamination can be adjusted according to the size of the display panel and the size of the actuator 1. To ensure the overall vibration effect, there are requirements for the arrangement density of the actuators, for example, the total lamination area of ​​the actuator 1 should not be less than 5% of the total area of ​​the display panel.

[0078] Optionally, the total area of ​​the actuator 1 accounts for 5%-30% of the total area of ​​the display panel.

[0079] Optionally, the total area of ​​the actuator 1 accounts for 5%-25% of the total area of ​​the display panel; or, the total area of ​​the actuator 1 accounts for 10%-20% of the total area of ​​the display panel.

[0080] Optionally, the actuator arrangement density can be 5-50 / square millimeter (for example, the total area of ​​the display panel is about 12,000 square millimeters, there are 10-40 actuators, and the actuator diameter is about 5 mm. Of course, the size of the actuator can also be set according to demand).

[0081] Optionally, the number of actuators distributed in the display area AA is smaller than the number of actuators distributed in the peripheral area (such as the non-display area BB); or, the distribution density of the actuators in the display area AA is smaller than the distribution density of the actuators in the peripheral area, so as to reduce the signal interference effect of the display area signal lines (such as gate lines, data lines) on the actuators.

[0082] Optionally, when the tactile electrodes 71 are strip electrodes, the spacing between two adjacent rows of tactile electrodes 71 (not shown) is smaller than the spacing between two adjacent rows of actuators 1 (for example Figure 6 ); or, when the tactile electrodes 71 are strip electrodes, the spacing between two adjacent columns of tactile electrodes 71 (not shown) is smaller than the spacing between two adjacent columns of actuators (e.g. Figure 6 ), thus, the cooperation between the actuator 1 and the tactile electrode 71 can enable the user to feel the vibration tactile feedback more directly.

[0083] When the actuator 1 is attached to a foldable or rollable display panel, the bending center axis area should be avoided to prevent the bending from affecting the service life of the actuator 1.

[0084] Preferably, the distance between the actuator and the bending center axis is 15um-500um, so as to avoid the influence on the actuator when the folding screen is folded.

[0085] As an implementation manner, the material forming the actuator 1 includes at least any one of piezoelectric ceramics, piezoelectric quartz, polyvinylidene fluoride, and fluorinated polyethylene.

[0086] For example, but not limited to, a thin film including at least one material of piezoelectric ceramics, piezoelectric quartz, polyvinylidene fluoride and fluorinated polyethylene can be formed on the back of the substrate of the touch display substrate 3 or the above-mentioned metal support plate 2 (such as a support plate of SUS material), and then the thin film is patterned to form the actuator 1. Of course, the actuator 1 can also be prepared in advance and then fixed to the metal support plate 2 by bonding.

[0087] Second, as Figure 7 As shown, the present invention provides a touch control method for the display panel as described above, comprising the following steps:

[0088] S1: Acquire a touch gesture for touching the display panel;

[0089] Touch gestures include, but are not limited to, tapping, clicking, sliding, and the like.

[0090] For example, an acceleration sensor is used to detect whether a tap is made. When the display panel is detected to be touched, it is determined whether the acceleration in the direction perpendicular to the display panel is greater than a preset threshold. If so, it is determined to be a tap, otherwise it is not a tap. In the case of no tap, it is determined whether the touch position has changed continuously. If so, it is a slide, otherwise it is a tap.

[0091] S2: According to the correspondence between the touch gesture and the tactile feedback type, the actuator 1 is controlled to vibrate and / or the touch driving voltage V of the touch display substrate 3 is increased, so that the tactile feedback substrate 7 generates electrostatic tactile feedback.

[0092] For example, but not limited to, the tactile feedback type corresponding to tapping may be vibration tactile feedback; the tactile feedback type corresponding to point touching may be vibration tactile feedback and / or electrostatic tactile feedback; the tactile feedback type corresponding to sliding may be electrostatic tactile feedback.

[0093] See also Figure 1 , the results of the display panel and the touch control method of the present application are exemplarily described below in one of the possible implementation methods.

[0094] The display panel includes a metal support plate 2 , and the material of the metal support plate 2 is, for example but not limited to, SUS stainless steel.

[0095] A plurality of actuators 1 are arranged on the first surface (also called the back surface) of the metal support plate 2, and the actuator 1 can be a piezoelectric ceramic sheet; a TFT backplane 31, an anode layer 32, a light-emitting layer 33, a cathode layer 34, a packaging layer 35, a touch circuit layer 36, a polarizing layer 4, an optical adhesive layer 5, a cover layer 6 and a tactile feedback substrate 7 are arranged in sequence on the second surface (also called the front surface) of the metal support plate 2.

[0096] Among them, the light-emitting layer 33 includes multiple pixels, each pixel includes multiple sub-pixels of different colors, such as red sub-pixels, blue sub-pixels and green sub-pixels, etc. Each sub-pixel may include a hole injection layer, a hole transport layer, an electroluminescent layer, an electron injection layer and an electron transport layer, etc.

[0097] The touch circuit layer 36 includes a receiving electrode layer, a first insulating layer 362 and a driving electrode layer which are stacked in sequence; the receiving electrode layer includes a plurality of receiving electrodes 361 which are arranged in parallel and spaced apart; the driving electrode layer includes a plurality of driving electrodes 363 which are arranged in parallel and spaced apart; the receiving electrodes 361 and the driving electrodes 363 are arranged crosswise.

[0098] The tactile feedback substrate 7 includes a tactile electrode layer and an insulating protective layer 72 which are stacked in sequence. The insulating protective layer 72 is, for example but not limited to, a cover glass. The tactile electrode layer includes a plurality of tactile electrodes 71 which are arranged in parallel and at intervals. The tactile electrodes 71 are arranged in parallel with the driving electrodes 363, and the tactile electrode layer and the receiving electrode layer are arranged on both sides of the driving electrode layer.

[0099] When working, the operating frequency range of the actuator 1 can be tens to hundreds of hertz, for example, but not limited to 50Hz, 100Hz, 200Hz, 300Hz. That is, the touch driving voltage V is applied to each driving electrode 363 at the above frequency to detect whether the capacitance value at the intersection of the receiving electrode 361 and the driving electrode 363 changes, so as to determine whether it is touched and the touched position. In addition, whether a tap is made is detected by an acceleration sensor or the like.

[0100] When the display panel is detected to be touched, it is determined whether the acceleration in the direction perpendicular to the display panel is greater than a preset threshold. If so, it is determined to be a tap, otherwise it is not a tap. In the case of no tap, it is determined whether the touch position has changed continuously. If so, it is a slide, otherwise it is a tap.

[0101] When the touch gesture is detected as a tap, the actuator 1 is controlled to vibrate to generate vibration tactile feedback; when the touch gesture is detected as a point touch, the actuator 1 is controlled to vibrate to generate vibration tactile feedback and / or increase the touch driving voltage V of the touch display substrate 3, that is, increase the voltage value of the touch driving voltage V passed into the driving electrode 363, so that the tactile feedback substrate 7 generates electrostatic tactile feedback; when the touch gesture is detected as a slide, the touch driving voltage V of the touch display substrate 3 is increased, that is, increase the voltage value of the touch driving voltage V passed into the driving electrode 363, so that the tactile feedback substrate 7 generates electrostatic tactile feedback.

[0102] It should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like used above to indicate orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0103] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features are replaced with the technical features with similar functions disclosed in this application (but not limited to) by each other.

Claims

1. A display panel, characterized in that: include: Touch display substrate, tactile feedback substrate and actuator; The tactile feedback substrate and the actuator are located on the same side and / or opposite sides of the touch display substrate, and the tactile feedback substrate is located on the display side of the touch display substrate; The tactile feedback substrate is used to generate electrostatic tactile feedback, and the actuator is used to generate vibration tactile feedback; The touch display substrate comprises a touch circuit layer, and the touch circuit layer comprises a receiving electrode layer, a first insulating layer and a driving electrode layer which are stacked in sequence; The receiving electrode layer includes a plurality of receiving electrodes arranged in parallel and at intervals; The driving electrode layer includes a plurality of driving electrodes arranged in parallel and at intervals; The receiving electrodes are arranged crosswise with the driving electrodes; The tactile feedback substrate comprises a tactile electrode layer and an insulating protection layer which are stacked in sequence; The tactile electrode layer includes a plurality of tactile electrodes arranged in parallel and at intervals, the tactile electrodes are arranged in parallel with the driving electrodes, and the tactile electrode layer and the receiving electrode layer are arranged on both sides of the driving electrode layer; or, The tactile electrode layer includes a grid electrode as a tactile electrode, and the tactile electrode layer and the receiving electrode layer are disposed on both sides of the driving electrode layer; the hollow area of ​​the grid electrode is 80%-90% of the hollow area formed by the cross-arranged receiving electrodes and the driving electrodes.

2. The display panel according to claim 1, characterized in that: In a projection direction perpendicular to a display surface of the touch display substrate, the tactile electrodes at least partially overlap with the driving electrodes.

3. The display panel according to claim 1, characterized in that: The touch display substrate comprises a touch circuit layer, and the touch circuit layer comprises a receiving electrode layer, a first insulating layer and a driving electrode layer which are stacked in sequence; The driving electrode layer includes a grid electrode as a driving electrode; The tactile feedback substrate comprises a tactile electrode layer and an insulating protection layer which are stacked in sequence; The tactile electrode layer includes a transparent surface electrode as a tactile electrode; The electrode overlap area between the grid electrode and the transparent surface electrode is greater than or equal to 60%; Alternatively, the touch display substrate comprises a touch circuit layer, and the touch circuit layer comprises a receiving electrode layer, a first insulating layer and a driving electrode layer which are stacked in sequence; The driving electrode layer includes driving electrodes; The tactile feedback substrate comprises a tactile electrode layer and an insulating protection layer which are stacked in sequence; The tactile electrode layer includes tactile electrodes; The driving electrode and the tactile electrode are both grid electrodes, and an electrode overlap area between the driving electrode and the tactile electrode is greater than or equal to 80%.

4. The display panel according to claim 1, characterized in that: The total area of ​​the actuators accounts for 5%-30% of the total area of ​​the display panel; or; the arrangement density of the actuators is 5-50 per square millimeter.

5. The display panel according to any one of claims 1 to 4, characterized in that: The touch display substrate comprises a display area and a non-display area around the display area; The tactile feedback substrate and the actuator are located on the same side of the touch display substrate, and the actuator is located in the non-display area.

6. The display panel according to any one of claims 1 to 4, characterized in that: The display panel is a foldable or rollable display panel, and the distance between the actuator and the bending center axis of the display panel is 15um-500um.

7. The display panel according to any one of claims 1 to 4, characterized in that: The touch display substrate includes a display area and a non-display area located around the display area, and a display middle frame located around the non-display area. A sound-emitting device or a vibrating device is arranged on the display middle frame, and the actuator is arranged on the inner side of the display middle frame. The distance between the actuator and the sound-emitting device or the vibrating device is 15um-50cm.

8. A touch control method for a display panel according to any one of claims 1 to 7, characterized in that: The following steps are involved: Acquire a touch gesture for touching the display panel; According to the correspondence between the touch gesture and the tactile feedback type, the actuator is controlled to vibrate and / or the touch driving voltage of the touch display substrate is increased, so that the tactile feedback substrate generates electrostatic tactile feedback.

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