A display panel and a driving method thereof, and a display device

Abstract

The present invention discloses a display panel and a driving method thereof, and a display device. The display panel includes a first substrate and a second substrate that are arranged relatively to each other, a liquid crystal layer located between the first substrate and the second substrate, and a driving chip located on the second substrate; a plurality of anti-peeping electrodes are arranged on the side of the first substrate facing the liquid crystal layer, and the anti-peeping electrodes are electrically connected to the driving chip; the display panel includes a first driving mode, and the driving chip is used to transmit a first voltage signal to the anti-peeping electrode during a partial period of time under the first driving mode, so that the display panel displays at a narrow viewing angle. In the present application, the first voltage signal is directly transmitted to the anti-peeping electrode through the driving chip, so that the display panel displays at a narrow viewing angle, without the need to additionally set up a viewing angle control circuit, which can simplify the preparation process of the display panel and improve the display effect of the display panel under a narrow viewing angle.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of display technology, and in particular to a display panel and a driving method thereof, and a display device. Background Art

[0002] Liquid crystal display (LCD) panels have the advantages of good image quality, small size, light weight, low driving voltage, low power consumption, no radiation and relatively low manufacturing cost, and they dominate the field of flat panel displays.

[0003] Existing liquid crystal display devices have a viewing angle switching function, which can switch or adjust the display device to a narrow viewing angle mode when anti-peeping is required. However, existing display devices require additional viewing angle control circuits to achieve narrow viewing angle display, which not only increases the difficulty of manufacturing the display device, but also has the problem of poor synchronization between different circuits, thus affecting the narrow viewing angle display effect. Summary of the invention

[0004] In view of this, the present invention provides a display panel and a driving method thereof, and a display device, which enable the display panel to have a narrow viewing angle display function without adding an additional viewing angle control circuit, and can also improve the display effect of the display panel under a narrow viewing angle.

[0005] In a first aspect, an embodiment of the present invention provides a display panel, comprising a first substrate and a second substrate arranged opposite to each other, a liquid crystal layer located between the first substrate and the second substrate, and a driving chip located on the second substrate;

[0006] A plurality of anti-peeping electrodes are disposed on a side of the first substrate facing the liquid crystal layer, and the anti-peeping electrodes are electrically connected to the driving chip;

[0007] The display panel includes a first driving mode, and the driving chip is used to transmit a first voltage signal to the anti-peeping electrode in a partial period under the first driving mode, so that the display panel displays at a narrow viewing angle.

[0008] In a second aspect, an embodiment of the present invention further provides a method for driving a display panel, which is used to drive the display panel according to the first aspect of the present invention, wherein the display panel includes a first driving mode, and the driving method includes:

[0009] A first voltage signal is transmitted to the anti-peeping electrode in a partial period of time under the first driving mode, so that the display panel displays at a narrow viewing angle.

[0010] In a third aspect, an embodiment of the present invention further provides a display device, comprising the display panel described in the first aspect of the present invention.

[0011] In an embodiment of the present invention, the display panel includes a first substrate and a second substrate that are arranged opposite to each other, a liquid crystal layer located between the first substrate and the second substrate, and a driving chip located on the second substrate; a plurality of anti-peeping electrodes are arranged on the side of the first substrate facing the liquid crystal layer, and the anti-peeping electrodes are electrically connected to the driving chip; the display panel includes a first driving mode, and the driving chip is used to transmit a first voltage signal to the anti-peeping electrode during a part of the time period under the first driving mode, so that the display panel displays at a narrow viewing angle. In the present application, the first voltage signal is directly transmitted to the anti-peeping electrode through the driving chip, so that a vertical electric field is generated between the first substrate and the second substrate, driving the liquid crystal molecules in the liquid crystal layer to deflect vertically, and realizing a narrow viewing angle display. There is no need to additionally set up a viewing angle control circuit, which can simplify the preparation process of the display panel and improve the display effect of the display panel under a narrow viewing angle. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 A schematic diagram of the structure of a display panel provided by an embodiment of the present invention;

[0013] Figure 2 for Figure 1 A schematic diagram of a partial cross-sectional structure of the display panel shown;

[0014] Figure 3 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention;

[0015] Figure 4 A schematic structural diagram of a pixel circuit provided by an embodiment of the present invention;

[0016] Figure 5 A schematic diagram of the structure of a gating module provided in an embodiment of the present invention;

[0017] Figure 6 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention;

[0018] Figure 7 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention;

[0019] Figure 8 A schematic diagram of a partial cross-sectional structure of a display panel provided by an embodiment of the present invention;

[0020] Fig. 9 A schematic diagram of a partial cross-sectional structure of another display panel provided by an embodiment of the present invention;

[0021] Fig.10 A schematic structural diagram of a display device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0022] The present invention will be 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 present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0023] Based on the above-mentioned defects of the related art, the inventor proposes the technical solution in this application. Specifically, Figure 1 A schematic diagram of the structure of a display panel provided by an embodiment of the present invention, Figure 2 for Figure 1 The partial cross-sectional structure diagram of the display panel shown in FIG. Figure 1 and Figure 2 In an embodiment of the present invention, the display panel includes: a first substrate 1 and a second substrate 2 which are arranged opposite to each other, a liquid crystal layer 3 located between the first substrate 1 and the second substrate 2, and a driving chip 4 located on the second substrate 2; a plurality of anti-peeping electrodes 5 are arranged on the side of the first substrate 1 facing the liquid crystal layer 3, and the anti-peeping electrodes 5 are electrically connected to the driving chip 4; the display panel includes a first driving mode, and the driving chip 4 is used to transmit a first voltage signal to the anti-peeping electrode 5 in a partial period of time under the first driving mode, so that the display panel displays with a narrow viewing angle.

[0024] like Figure 1 As shown in , a liquid crystal layer 3 is arranged between the first substrate 1 and the second substrate 2. The first substrate 1 may be, for example, a color film substrate, and the second substrate 2 may be, for example, a thin film transistor array substrate. The display panel provided in the present application may be applicable to display panels of modes such as in-plane switching (IPS) and fringe electric field switching (FFS). For IPS or FFS display panels, the common electrode 6 and the pixel electrode 7 are formed on the same substrate (i.e., a thin film transistor array substrate). During the display process, the driving chip 4 transmits voltage signals to the common electrode 6 and the pixel electrode 7 respectively, and an electric field is formed between the common electrode 6 and the pixel electrode 7, driving the liquid crystal molecules in the liquid crystal layer 3 to rotate in a plane roughly parallel to the substrate, thereby obtaining a wider viewing angle and realizing wide viewing angle display. In the present application, the display panel will be described by taking the FFS type as an example, wherein the common electrode 6 and the pixel electrode 7 may be arranged in the second substrate 2. A thin film transistor is also arranged in the second substrate 2, which is not shown in the figure. Those skilled in the art may set its specific structure according to actual needs, and the present invention does not repeat or limit this.

[0025] The display panel can be divided into a display area AA and a non-display area NA, and the common electrode 6, the pixel electrode 7 and the liquid crystal layer 3 are all located in the display area AA. The driver chip 4 can be arranged in the non-display area NA, and the driver chip 4 is used to transmit electrical signals to the common electrode 6, the pixel electrode 7, etc. to complete the normal display of the display panel.

[0026] Among them, a plurality of data lines 8, a plurality of scanning lines 9, and a common electrode line (not shown in the figure) may also be arranged in the second substrate 2, the data lines 8 and the scanning lines 9 are insulated from each other and cross to define a plurality of sub-pixel regions SP, the pixel electrode 7 is arranged in the sub-pixel region SP, and a thin film transistor (not shown in the figure) may also be arranged in each sub-pixel region SP, and the thin film transistor is located near the intersection of the scanning line 9 and the data line 8. Each thin film transistor includes a gate (not shown in the figure), an active layer (not shown in the figure), a source (not shown in the figure) and a drain (not shown in the figure), wherein the gate is electrically connected to the corresponding scanning line 9, the source is electrically connected to the corresponding data line 8, and the drain is electrically connected to the corresponding pixel electrode 7. The common electrode line (not shown in the figure) is used to transmit a power supply voltage signal to the common electrode 6. The specific arrangement of the above-mentioned data lines 8, scanning lines 9, pixel electrodes 7 and thin film transistors can be set by those skilled in the art, and the embodiment of the present invention does not repeat or limit this.

[0027] It is worth mentioning that in the present application, a plurality of anti-peeping electrodes 5 are arranged on the side of the first substrate 1 facing the liquid crystal layer 3, and each anti-peeping electrode 5 is electrically connected to the driving chip 4. The display panel includes a first driving mode, which is a narrow viewing angle display mode. The turning on of the narrow viewing angle display mode can also be understood as turning on the anti-peeping function. In at least part of the time period under the first driving mode, the driving chip 4 sends a first voltage signal to the anti-peeping electrode 5, and at the same time, the driving chip 4 can transmit a power supply voltage signal to the common electrode 6, so that a vertical electric field E1 is formed between the first substrate 1 and the second substrate 2 (as shown by the arrow in the figure), and the liquid crystal molecules 31 in the liquid crystal layer 3 are tilted and tilted (i.e., rotated in the vertical direction) under the action of the vertical electric field E1, and the display panel produces light leakage, which reduces the contrast of the picture, thereby achieving a narrow viewing angle display. Figure 2 The display panel is in the first driving mode.

[0028] Among them, the existing voltage signal of the driver chip 4 in the existing display panel can be reused as the first voltage signal, for example, the data signal, the scanning signal or the detection signal can be reused as the first voltage signal. In this way, there is no need to set up an additional viewing angle control circuit, and only the existing function of the driver chip 4 can be used to provide a voltage signal to the anti-peeping electrode 5 to complete the narrow viewing angle display of the display panel. In addition, using the driver chip 4 to directly transmit the voltage signal to the anti-peeping electrode 5 can also avoid the problem of the anti-peeping voltage signal and the display voltage signal being out of sync in the prior art, thereby improving the display effect of the display panel under a narrow viewing angle.

[0029] The display panel also includes a second driving mode, which is a wide viewing angle display mode, and can also be understood as a mode in which the anti-peeping function is turned off. In the wide viewing angle display mode, no electrical signal needs to be transmitted to the anti-peeping electrode 5, and the liquid crystal molecules 31 are only deflected in the horizontal direction.

[0030] Optionally, when the voltage value of the first voltage signal is different, the vertical electric field data signal E1 generated by the anti-peeping electrode 5 and the common electrode 6 has different intensities, and the vertical deflection angle of the liquid crystal molecule 31 is also different. The closer the vertical deflection angle of the liquid crystal molecule 31 is to 90 degrees vertically, the better the anti-peeping effect. In this embodiment, the first voltage signal can also be set as a value-adjustable voltage signal, and then the anti-peeping effect of different gears can be achieved by controlling the size of the first voltage signal.

[0031] It should be noted that, in order to clearly illustrate the arrangement of the anti-peeping electrode 5 on the first substrate 1, Figure 1 The top view does not show other structures of the first substrate 1 (such as a color resist layer, etc.). In addition, the display panel may also be provided with any other structures known to those skilled in the art, such as a polarizer, etc., but is not limited thereto.

[0032] In an embodiment of the present invention, the display panel includes a first substrate and a second substrate that are arranged opposite to each other, a liquid crystal layer located between the first substrate and the second substrate, and a driving chip located on the second substrate; a plurality of anti-peeping electrodes are arranged on the side of the first substrate facing the liquid crystal layer, and the anti-peeping electrodes are electrically connected to the driving chip; the display panel includes a first driving mode, and the driving chip is used to transmit a first voltage signal to the anti-peeping electrode during a part of the time period under the first driving mode, so that the display panel displays at a narrow viewing angle. In the present application, the first voltage signal is directly transmitted to the anti-peeping electrode through the driving chip, so that a vertical electric field is generated between the first substrate and the second substrate, driving the liquid crystal molecules in the liquid crystal layer to deflect vertically, and realizing a narrow viewing angle display. There is no need to additionally set up a viewing angle control circuit, which can simplify the preparation process of the display panel and improve the display effect of the display panel under a narrow viewing angle.

[0033] The specific arrangement of the anti-peeping electrode 5 on the first substrate 1 is not limited in the embodiment of the present invention, and those skilled in the art can design it according to actual needs. In the following embodiments, the present application will introduce the specific structure and arrangement of the anti-peeping electrode 5 with several optional schemes.

[0034] Figure 3 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention is shown as an example. Figure 3 As shown, in a possible embodiment, the second substrate 2 may further include a plurality of data lines 8 and a gating module 10; the plurality of data lines 8 extend along a first direction X and are arranged along a second direction Y; the first direction X and the second direction Y intersect; one end of the gating module 10 is electrically connected to the driving chip 4, and the other end of the gating module 10 is electrically connected to the anti-peeping electrode 5 and the data line 8; the gating module 10 is used to select the data line 8 and the driving chip 4, or to select the anti-peeping electrode 5 and the driving chip 4.

[0035] refer to Figure 3, the data line 8 can extend along the first direction X and be arranged in the second direction Y on the second substrate 2. Taking the orientation shown in the figure as an example, the first direction X can be defined as the column direction, and the second direction Y can be defined as the row direction. A gating module 10 is also provided in the display panel. One end of the gating module 10 can be electrically connected to the data signal output port of the driving chip 4, and the other end of the gating module 10 is simultaneously connected to the anti-peeping electrode 5 and the data line 8. It should be noted that the simultaneous connection of the anti-peeping electrode 5 and the data line 8 described here does not mean that the gating module 10 electrically connects the driving chip 4, the anti-peeping electrode 5 and the data line 8 at the same time, but that the gating module 10 can selectively select the driving chip 4 and the data line 8, or select the anti-peeping electrode 5 and the driving chip 4 in different driving stages.

[0036] Figure 4 A schematic diagram of a pixel circuit according to an embodiment of the present invention, combined with Figure 3 and Figure 4 The driving process of the display panel in the embodiment of the present invention is only briefly introduced. Among them, one sub-pixel area SP can correspond to one pixel circuit, and the pixel circuit is composed of a liquid crystal equivalent capacitor Clc and a storage capacitor Cst formed by a thin film transistor T, a pixel electrode 7 and a common electrode 6, and the common electrode 6 receives a power supply voltage signal Vcom. The gate of the thin film transistor T receives a scan signal Scan, and the source receives a data signal Vdata. The storage capacitor Cst is connected to the pixel electrode 7 and the common electrode 6 respectively. The driving process of the display panel for displaying a frame of the picture includes a first stage and a second stage. In the first stage, the scan signal Scan controls the thin film transistor T to turn on, and the data signal Vdata is transmitted to the pixel electrode 7. The data signal Vdata is charged into the liquid crystal equivalent capacitor Clc, and a horizontal electric field is generated between the pixel electrode 7 and the common electrode 6, driving the liquid crystal molecules 31 to deflect in the horizontal direction to realize the picture display. The first stage can also be called a charging stage; in addition, since the liquid crystal equivalent capacitor Clc is connected in parallel with the storage capacitor Cst, the data signal Vdata is also charged into the storage capacitor Cst in the first stage. In the second stage, the thin film transistor T is turned off, the pixel circuit no longer receives the data signal Vdata, and the voltage stored in the storage capacitor Cst is used to maintain the image display of the current frame. The second stage can also be called the holding stage.

[0037] According to the above driving process, it can be known that within one frame of the display screen of the display panel, there is no need to continuously transmit data signals to the data line 8. Therefore, in this embodiment, in the first stage, the gating module 10 can be used to connect the driver chip 4 to the data line 8, and the second voltage signal (ie, the data signal) is transmitted to the pixel circuit to complete the normal charging of the pixel circuit. In other time periods except the first stage (ie, the second stage), the gating module 10 is used to connect the driver chip 4 to the anti-peeping electrode 5, and the first voltage signal is transmitted to the anti-peeping electrode 5. A vertical electric field E1 is generated between the anti-peeping electrode 5 and the common electrode 6, driving the liquid crystal molecules 31 to rotate in the vertical direction, thereby increasing the light transmittance of the display panel and reducing the display viewing angle. It can be understood that in the narrow viewing angle display mode, the liquid crystal molecules 31 are deflected in both the horizontal and vertical directions.

[0038] Those skilled in the art can understand that the liquid crystal molecules 31 in the liquid crystal layer 3 mentioned in the above embodiment can be positive liquid crystal molecules. Positive liquid crystal molecules have the advantage of fast response. When no voltage is applied to the display panel, the positive liquid crystal molecules are in a lying state.

[0039] The first voltage signal is the anti-peeping voltage signal, and the first voltage signal can be a data signal or other voltage signals. In this embodiment, the first voltage signal and the second voltage signal are preferably the same, that is, the data signal is multiplexed into the first point voltage signal. In this way, the display viewing angle of the display panel can be adjusted using the same voltage signal (data signal).

[0040] In addition, in the second stage, the data signal is used as the anti-peeping voltage signal to ensure that the liquid crystal molecules 31 flip vertically when flipped horizontally, which improves the synchronization of the horizontal flipping and vertical flipping of the liquid crystal molecules 31, and can ensure that each frame of the display screen presents a narrow viewing angle display in the first driving mode, thereby improving the anti-peeping effect. In addition, since the data signal is a numerically adjustable voltage signal, under normal circumstances, the driver chip 4 can output data signals of different voltages corresponding to the grayscale of G0 to G255, and using the data signal as the first voltage signal can realize the anti-peeping function of different gears in a relatively simple way.

[0041] Among them, the above Figure 3 In the illustrated embodiment, the anti-peeping electrode 5 is in a strip shape, but the actual setting is not limited thereto. The anti-peeping electrode 5 may also be in a block shape or other shapes as long as it can normally transmit the first voltage signal. When the anti-peeping electrode 5 is in a strip shape, the number of the anti-peeping electrodes 5 may be set to be less than or equal to the number of the data lines 8 to ensure that each anti-peeping electrode 5 can receive data signals, and the anti-peeping electrodes 5 also extend along the first direction X and are arranged in the second direction Y. When the number of anti-peeping electrodes 5 is the same as the number and arrangement of the data lines 8, the data lines 8 and the anti-peeping electrodes 5 may be prepared using the same mask, without the need to open a new mask, which can reduce the manufacturing cost of the display panel.

[0042] Since the liquid crystal molecules 31 have a characteristic, if a voltage in the same direction is applied to the liquid crystal molecules 31 for a long time, the liquid crystal molecules 31 will be polarized. Even if the voltage is cancelled, the liquid crystal molecules 31 will not be able to return to their original state due to the change of the electric field because of the destruction of the characteristic. Therefore, when displaying the picture, the liquid crystal molecules 31 can be flipped at a certain frequency to prevent the liquid crystal molecules 31 from being fixed in the same direction and losing their activity. The display panel supports a variety of flipping modes, such as point flipping mode, row flipping mode, column flipping mode, etc. The way to achieve flipping is mainly to continuously alternate the positive and negative polarity of the source voltage of the thin film transistor T (i.e., the positive and negative polarity of the data signal), or to continuously alternate the positive and negative polarity of the common electrode 6 to achieve the purpose of flipping. In this embodiment, the data lines 8 of the odd columns and the even columns can be set to receive data signals with opposite polarities, for example, the data lines 8 of the even columns receive data signals with positive polarity (or negative polarity), and the data lines 8 of the odd columns receive data signals with negative polarity (or positive polarity), so as to achieve the effect of column flipping. Correspondingly, if the data signal is multiplexed into the first voltage signal, the polarities of the first voltage signals transmitted by the odd-numbered anti-peeping electrodes 5 and the even-numbered anti-peeping electrodes 5 are also opposite, thereby improving the display uniformity when the anti-peeping function is turned on.

[0043] Optionally, the embodiment of the present invention does not limit the specific configuration of the gating module 10, and those skilled in the art may make a selection according to actual needs. Any method that can realize the function of the gating module 10 is within the scope of the technical solution protected by the embodiment of the present invention.

[0044] For example, Figure 5 A schematic diagram of a gating module structure provided in an embodiment of the present invention can be referred to Figure 3 and Figure 5 In a possible embodiment, the selection module 10 may include multiple selectors 11, the selector 11 includes an input terminal a, a first output terminal b and a second output terminal c; the input terminal a is electrically connected to the driving chip 4, the first output terminal b is electrically connected to the data line 8, and the second output terminal c is electrically connected to the anti-peeping electrode 5.

[0045] like Figure 3 and Figure 5 As shown, the selection module 10 can be formed by using the selector 11, and the selector 11 is a demux circuit commonly used in the field of display panels. The selector 11 includes an input terminal a electrically connected to the data signal port of the driver chip 4, a first output terminal b electrically connected to the data line 8, and a second output terminal c electrically connected to the anti-peeping electrode 5. The driver chip 4 can control the input terminal a and the first output terminal b to be turned on in the first stage, and transmit the second voltage signal to each data line 8 through the selector 11; and control the input terminal a and the second output terminal c to be turned on in the second stage, and transmit the first voltage signal to each anti-peeping electrode 5 through the selector 11. Among them, when the anti-peeping electrode 5 adopts Figure 3In the configuration shown, the numbers of the selectors 11, the data lines 8 and the anti-peeping electrodes 5 can be set to be the same.

[0046] Optionally, the selector 11 may include two diodes, the first diode T1 includes a first sub-control terminal d1, a first sub-input terminal a1 and a first sub-output terminal b1; the second diode T1 includes a second sub-control terminal d2, a second sub-input terminal a2 and a second sub-output terminal b2. Specifically, the first sub-input terminal a1 and the second sub-input terminal a2 are electrically connected to the data signal output port of the driving chip 4 as the input terminal a of the selector 11, the first sub-output terminal b1 is the first output terminal b of the selector 11, and the second sub-output terminal b2 is the second output terminal c of the selector 11. The first sub-control terminal d1 and the second sub-control terminal d2 are electrically connected to the driving chip 4 respectively, wherein the first sub-control terminal d1 and the second sub-control terminal d2 can be used to receive the clock signal sent by the driving chip 4. In the first stage, the first sub-control terminal d1 is turned on according to the first clock signal CK1, the first sub-input terminal a1 is connected to the first sub-output terminal b1, and the selector 11 is used to transmit the second voltage signal (data signal); after a preset delay time, the first sub-control terminal d1 is turned off, the second sub-control terminal d2 is turned on according to the second clock signal CK2, the second sub-input terminal a2 is connected to the second sub-output terminal b2, and the selector 11 is used to transmit the first voltage signal (which can also be a data signal). This stage is the second stage.

[0047] Optionally, if the display panel is in the second driving mode, that is, the anti-peeping function does not need to be turned on, and the display panel is kept at a wide viewing angle, the driver chip 4 can continuously control the selection module 10 to select the driver chip 4 and the data line 8, that is, the input terminal a of the selector 11 is always connected to the first output terminal b.

[0048] Figure 6 A structural diagram of another display panel provided by an embodiment of the present invention is shown in FIG. Figure 6 As shown, in other possible embodiments, the second substrate 2 may further include a detection signal line 12 ; one end of the detection signal line 12 is electrically connected to the driving chip 4 , and the other end of the detection signal line 12 is electrically connected to the anti-peeping electrode 5 .

[0049] refer to Figure 6, a detection signal line 12 is also provided in the second substrate 2. The detection signal line 12 can be provided in the non-display area NA near the driver chip 4. One end of the detection signal line 12 is electrically connected to the detection signal output port of the driver chip 4, and the other end is electrically connected to the anti-peeping electrode 5. The detection signal line 12 is used to transmit a test signal to the data line 8, the scan line 9 and / or the common electrode line when performing a display test (Visual Test, VT) on the display panel to detect whether each wiring and thin film transistor T in the display panel are normal. After the display panel is put into use, the detection signal line 12 and the detection signal output port are generally in an idle state. In this embodiment, the detection signal line 12 can be used to transmit a first voltage signal to the anti-peeping electrode 5.

[0050] Specifically, in a part of the time period of the first driving mode, the detection signal outputted from the detection signal output terminal is used as the first voltage signal to make the display panel present a narrow viewing angle. The detection signal can also be a numerically adjustable voltage signal, thereby realizing the multi-spying gear adjustment of the display panel. The detection signal line 12 is used to transmit a signal to the peeping electrode 5, and the peeping electrode 5 can continuously transmit the first voltage signal within a frame of the display screen, so as to ensure that the display panel presents a narrow viewing angle display state in the first driving mode.

[0051] Optionally, under this setting, if the display panel is in the second driving mode, that is, the anti-peeping function is not turned on, the driving chip 4 can control the detection signal line 12 to float, that is, the driving chip 4 does not provide the first voltage signal to the detection signal line 12, and the display panel maintains a wide viewing angle display.

[0052] Among them, optionally, the detection signal line 12 generally includes a first detection signal line 121 and a second detection signal line 122, and the first detection signal line 121 and the second detection signal line 122 are electrically connected to the two detection signal output ports of the driver chip 4. The first detection signal line 121 is used to transmit the detection signal to the odd-numbered column data line 8, and the second detection signal line 122 is used to transmit the detection signal to the even-numbered column data line 8. It should be noted that in order to clearly show the setting method of the detection signal line 12 and the anti-peeping electrode 5, Figure 6 The connection between the detection signal line 12 and the data line 8 is not shown.

[0053] In this embodiment, the anti-peeping electrode 5 can still be set to a strip shape and arranged in the same manner as the data line 8. At this time, the odd-numbered anti-peeping electrodes 5 can be set to be electrically connected to the driver chip 4 through the first detection signal line 121, and the even-numbered anti-peeping electrodes 5 can be electrically connected to the second detection signal line 122. The driver chip 4 transmits detection signals of opposite polarities to the first detection signal line 121 and the second detection signal line 122. For example, a positive (or negative) detection signal is transmitted to the first detection signal line 121, and a negative (or positive) detection signal is transmitted to the second detection signal line 122. This can also enhance the uniformity of the display when the anti-peeping function is turned on. In the figure, the dotted line represents the first detection signal line 121, and the solid line represents the second detection signal line 122.

[0054] Optionally, the above embodiments are described with the anti-peeping electrode 5 being in a strip shape. Figure 7 This is a schematic diagram of the structure of another display panel provided by an embodiment of the present invention. In other possible embodiments, the anti-peeping electrode 5 may be configured to be block-shaped, and the block-shaped anti-peeping electrode 5 is arranged in an array along the first direction X and the second direction Y.

[0055] Optionally, when the anti-peeping electrode 5 is in a block shape, the orthographic projection of the anti-peeping electrode 5 on the first substrate 1 may be arranged to overlap the orthographic projection of the pixel electrode 7 on the first substrate 1. In this way, in the first driving mode, the vertical electric field generated between the anti-peeping electrode 5 and the common electrode 6 is close to the horizontal electric field generated between the pixel electrode 7 and the common electrode 6, and the degree of flipping of the liquid crystal molecules 31 in the same sub-pixel area SP is close or the same, further improving the display effect in the narrow viewing angle display mode.

[0056] Optional, you can continue to refer to Figure 7 When the anti-peeping electrode 5 is in a block shape, a plurality of signal transmission lines 13 may be further provided on the first substrate 1, and the signal transmission lines 13 extend along the first direction X and are arranged along the second direction Y; the signal transmission lines 13 are electrically connected to the plurality of anti-peeping electrodes 5 arranged in sequence along the first direction X; one end of the signal transmission line 13 is close to the driving chip 4 and is electrically connected to the driving chip 4.

[0057] Specifically, when the anti-peeping electrodes 5 are block-shaped, in order to ensure the transmission effect of the first voltage signal in each anti-peeping electrode 5, a plurality of signal transmission lines 13 may be provided in the first substrate 1, and the anti-peeping electrodes 5 and the driving chip 4 are electrically connected through the signal transmission lines 13. The number and arrangement of the signal transmission lines 13 may be the same as those of the data lines 8. The number of the anti-peeping electrodes 5 arranged in the same row direction is the same as the number of the signal transmission lines 13, and each signal transmission line 13 is electrically connected to the anti-peeping electrodes 5 in the same column direction, and the anti-peeping electrodes 5 in the same column receive the first voltage signal transmitted by the same signal transmission line 13.

[0058] When the anti-peeping electrode 5 is in a block shape, during a partial time period under the first driving mode, a first voltage signal with opposite polarity can be transmitted to the odd-column signal transmission line 13 and the even-column signal transmission line 13, so that the first voltage signals received by any two adjacent anti-peeping electrodes 5 along the second direction Y have opposite polarities, thereby enhancing the uniformity of the display when the anti-peeping function is turned on.

[0059] The signal transmission line 13 and the anti-peeping electrode 5 can be arranged in the same layer. When the signal transmission line 13 and the anti-peeping electrode 5 are arranged in the same layer, the signal transmission line 13 is directly electrically connected to the anti-peeping electrodes 5 in the same column direction. The advantage of the same layer arrangement is that the thickness of the display panel in the light emitting direction will not be increased, which is conducive to the thinness of the display panel.

[0060] Optional, Figure 8 A partial cross-sectional structural diagram of a display panel provided by an embodiment of the present invention, referring to Figure 8 The signal transmission line 13 and the anti-peeping electrode 5 can be arranged in different layers and electrically connected through a via hole.

[0061] like Figure 8 As shown in , the signal transmission line 13 and the anti-peeping electrode 5 can also be arranged in different film layers, and the two are separated by an insulating layer. In this case, the signal transmission line 13 can be electrically connected to the anti-peeping electrodes 5 in the same column direction by setting vias in the insulating layer. The advantage of the different layer arrangement is that it can reduce the wiring difficulty of the film layer where the anti-peeping electrode 5 is located, and it can also reduce the parasitic capacitance between the signal transmission line 13 and the anti-peeping electrode 5.

[0062] Optional, you can continue to refer to Figure 1 , Figure 3 , Figure 6 and Figure 7 In a possible embodiment, the display panel may further include a plurality of conductive structures 14, and the conductive structures 14 are located between the first substrate 1 and the second substrate 2; when the anti-peeping electrode 5 is in a strip shape, the anti-peeping electrode 5 is electrically connected to the driving chip 4 through the conductive structures 14; when the anti-peeping electrode 5 is in a block shape, the signal transmission line 13 is electrically connected to the driving chip 4 through the conductive structures 14.

[0063] Specifically, since the driving chip 4 and the anti-peeping electrode 5 are arranged on different substrates, they can be electrically connected through a conductive structure 14 between the first substrate 1 and the second substrate 2 . The conductive structure 14 can be arranged in the non-display area NA close to the driving chip 4 .

[0064] When the anti-peeping electrode 5 is in a strip shape (such as Figure 1 , Figure 3 and Figure 6), the end of the anti-peeping electrode 5 close to the driving chip 4 can be electrically connected to the driving chip 4 through the conductive structure 14. If the data signal is multiplexed into a first voltage signal, the end of the anti-peeping electrode 5 close to the driving chip 4 is electrically connected to the output end of the gating module 10 (specifically, the second output end c of the selector 11) through the conductive structure 14. If the first voltage signal is transmitted by the detection signal line 12, the end of the anti-peeping electrode 5 close to the driving chip 4 is electrically connected to the detection signal line 12 through the conductive structure 14.

[0065] When the anti-peeping electrode 5 is in block shape (such as Figure 7 As shown in FIG. 1 , the end of the signal transmission line 13 close to the driver chip 4 can be electrically connected to the driver chip 4 through the conductive structure 14. If the data signal is multiplexed into a first voltage signal, the end of the signal transmission line 13 close to the driver chip 4 is electrically connected to the output end of the gating module 10 (specifically, the second output end c of the selector 11) through the conductive structure 14. If the detection signal line 12 is used to transmit the first voltage signal, the end of the signal transmission line 13 close to the driver chip 4 is electrically connected to the detection signal line 12 through the conductive structure 14.

[0066] The conductive structure 14 may be a conductive gold ball or conductive glue, but is not limited thereto. The specific configuration of the conductive structure 14 may be selected by a person skilled in the art.

[0067] Optional, Fig. 9 A partial cross-sectional structural diagram of another display panel provided by an embodiment of the present invention, referring to Fig. 9 In a possible embodiment, the first substrate 1 may further include a color resist layer 15, which is on the side of the first substrate 1 away from the anti-peeping electrode 5, and the color resist layer 15 includes a color resist 16 and a black matrix 17; the orthographic projection of the anti-peeping electrode 5 on the first substrate 1 is located within the coverage range of the orthographic projection of the black matrix 17 on the first substrate 1.

[0068] Specifically, Fig. 9 As shown, in the first substrate 1, a color resist layer 15 may be further provided on the side of the anti-peeping electrode 5 away from the liquid crystal layer 3. The color resist layer 15 and the film layer where the anti-peeping electrode 5 is located may be spaced by a planarization layer. The color resist layer 15 includes a plurality of color resists 16 and a black matrix 17. The black matrix 17 may be in a grid shape, and the color resist 16 may be provided between the grid-shaped black matrix 17. The color resist 16 may include color resists 16 of different colors, and the black matrix 17 may be used to prevent leakage or cross-color between sub-pixel regions SP of different luminous colors. The specific arrangement of the color resist 16 and the black matrix 17 may be designed by those skilled in the art according to actual needs, and the present invention does not elaborate on or limit this.

[0069] Among them, it is worth mentioning that in the present application, the anti-peeping electrode 5 can be arranged below the black matrix 17, that is, the orthographic projection of the black matrix 17 on the first substrate 1 covers the orthographic projection of the anti-peeping electrode 5 on the first substrate 1. In this way, whether the anti-peeping electrode 5 is set as a transparent conductive electrode (such as an ITO electrode, etc.) or a non-transparent electrode (such as a metal electrode, etc.), it will not affect the aperture ratio and the transmittance of the sub-pixel area SP.

[0070] Optional, such as Figure 2 and Figure 8 As shown in , in some embodiments, the anti-peeping electrode 5 may be formed of a transparent conductive material, and the orthographic projection of the anti-peeping electrode 5 on the first substrate 1 is located within the coverage of the orthographic projection of the color resist 16 on the first substrate 1. When the anti-peeping electrode 5 is a transparent electrode, the anti-peeping electrode 5 may be disposed below the color resist 16, and the anti-peeping electrode 5 formed of a transparent conductive material will not affect the transmittance of the display panel.

[0071] In addition, when the anti-peeping electrode 5 is prepared using a transparent conductive material, the anti-peeping electrode 5 may be preferably arranged in an array block, and the anti-peeping electrodes 5 in the same column are electrically connected to the driver chip through the signal transmission line 13. The signal transmission line 13 may be set as a metal routing line, and the first voltage signal is transmitted to each anti-peeping electrode 5 through the metal routing line, which can reduce the overall impedance of the anti-peeping electrode 5 and the signal transmission line 13, and avoid delays in the signal on the anti-peeping electrode 5. The signal transmission line 13 may be located below the black matrix to avoid the metal routing line affecting the transmittance of the display panel.

[0072] Optionally, in a possible embodiment, a touch electrode (not shown) may be further provided in the display panel to realize the touch function of the display panel. Among them, additional touch electrodes may be provided or existing electrodes may be reused as touch electrodes. The specific arrangement of the touch electrodes is limited in the embodiment of the present invention, and can be designed by those skilled in the art according to actual needs.

[0073] When the common electrode 6 is reused as a touch electrode, a frame of the display panel also includes a touch period. During the touch period, the common electrode 6 is used for touch sensing rather than for displaying the picture. Those skilled in the art can understand that in the time dimension, there should be no overlapping area between the touch period and the first stage, that is, touch sensing is performed in other time periods except the first stage. Therefore, during the touch period, the data line 8 does not need to transmit a data signal. In this embodiment, during the touch period, the driver chip 4 can control the gating module 10 to gating the driver chip 4 and the anti-peeping electrode 5, and then transmit the data signal to the anti-peeping electrode 5, so as to multiplex the data signal as the first voltage signal to realize narrow viewing angle display. The embodiment of the present invention does not limit the relative relationship between the second stage and the touch stage in the time dimension, and those skilled in the art can set it according to actual needs, for example, the second stage and the touch stage can be set to overlap, or the second stage includes the touch stage, etc.

[0074] Based on the same inventive concept, an embodiment of the present invention also provides a display panel driving method for driving the display panel provided by any embodiment of the present invention, the display panel includes a first driving mode, and the driving method includes: transmitting a first voltage signal to the anti-peeping electrode 5 in a partial period of time under the first driving mode, so that the display panel displays at a narrow viewing angle.

[0075] The specific implementation of the above driving method can refer to the above embodiments, which will not be repeated here. The driving method of the display panel provided by the embodiment of the present invention includes all technical features and corresponding beneficial effects of the display panel provided by any embodiment of the present invention, which will not be described in detail here.

[0076] Optionally, in a possible embodiment (such as Figure 3 to Figure 5 As shown), the second substrate 2 includes a plurality of data lines 8 and a gating module 10; the plurality of data lines 8 extend along a first direction X and are arranged along a second direction Y; the first direction X and the second direction Y intersect; one end of the gating module 10 is electrically connected to the driving chip 4, and the other end of the gating module 10 is electrically connected to the anti-peeping electrode 5 and the data line 8; the first driving mode includes at least one first stage and at least one second stage; a first voltage signal is transmitted to the anti-peeping electrode 5 during a partial period of time under the first driving mode so that the display panel displays at a narrow viewing angle, including: in the first stage, the gating module 10 is used to select the data line 8 and the driving chip 4 to transmit the second voltage signal to the data line 8; in the second stage, the gating module 10 is used to select the anti-peeping electrode 5 and the driving chip 4 to transmit the first voltage signal to the anti-peeping electrode 5.

[0077] Wherein, both the first voltage signal and the second voltage signal can be data signals.

[0078] Optionally, in a possible embodiment (such as Figure 3 to Figure 5As shown), the gating module 10 includes a plurality of selectors 11, and the selector 11 includes an input terminal a, a first output terminal b, and a second output terminal c; the input terminal a is electrically connected to the driving chip 4, the first output terminal b is electrically connected to the data line 8, and the second output terminal c is electrically connected to the anti-peeping electrode 5; in the first stage, the gating module 10 is used to select the data line 8 and the driving chip 4 to transmit the second voltage signal to the data line 8, including: in the first stage, the input terminal a is controlled to be turned on with the first output terminal b, so as to transmit the second voltage signal to the data line 8 through the gating module 10; in the second stage, the gating module 10 is used to select the anti-peeping electrode 5 and the driving chip 4 to transmit the first voltage signal to the anti-peeping electrode 5, including: in the second stage, the input terminal a is controlled to be turned on with the second output terminal c, so as to transmit the first voltage signal to the anti-peeping electrode 5 through the gating module 10.

[0079] Optionally, in a possible embodiment, the display panel also includes a second driving mode; the driving method also includes: in the second driving mode, using the selection module 10 to select the data line 8 and the driving chip 4 to transmit a second voltage signal to the data line 8, so that the display panel displays a wide viewing angle.

[0080] Optionally, in a possible embodiment, the first driving mode also includes a touch period, and the touch period does not overlap with the first stage; the driving method also includes: during the touch period, using the selection module 10 to select the anti-peeping electrode 5 and the driving chip 4 to transmit a first voltage signal to the anti-peeping electrode 5.

[0081] Optionally, in a possible embodiment (such as Figure 6 As shown), the second substrate 2 also includes a detection signal line 12, which is close to the driving chip 4; the detection signal line 12 is used to electrically connect the anti-peeping electrode 5 and the driving chip 4; in part of the time period under the first driving mode, a first voltage signal is transmitted to the anti-peeping electrode 5, so that the display panel displays with a narrow viewing angle, including: in part of the time period under the first driving mode, the first voltage signal is transmitted to the anti-peeping electrode 5 through the detection signal line 12, so that the display panel displays with a narrow viewing angle.

[0082] Optionally, in a possible embodiment, the display panel further includes a second driving mode; the driving method further includes: in the second driving mode, controlling the detection signal line 12 to float, so that the display panel displays at a wide viewing angle.

[0083] Optionally, in a possible embodiment, the anti-peeping electrode 5 is in a strip shape, and the anti-peeping electrode 5 extends along the first direction X and is arranged along the second direction Y (eg Figure 1 , Figure 3 and Figure 6 Alternatively, the anti-peeping electrode 5 is in a block shape, and the anti-peeping electrode 5 is arranged in an array along the first direction X and the second direction Y (as shown in FIG. Figure 7As shown); wherein the first direction X and the second direction Y intersect; in a partial period of time in the first driving mode, a first voltage signal is transmitted to the anti-peeping electrode 5 so that the display panel displays at a narrow viewing angle, including: transmitting a first voltage signal with opposite polarity to any two adjacent anti-peeping electrodes 5 along the second direction Y.

[0084] The specific implementations of the driving methods provided in the above embodiments may all be referred to in the corresponding display panel embodiments, and will not be described in detail here.

[0085] An embodiment of the present invention further provides a display device, Fig.10 FIG. 1 is a schematic diagram of a display device provided by an embodiment of the present invention. Fig.10 As shown, the display device includes the display panel 100 provided by any embodiment of the present invention. Therefore, the display device provided by the embodiment of the present invention has the corresponding beneficial effects of the display panel provided by the embodiment of the present invention, which will not be repeated here. Exemplarily, the display device can be an electronic device such as a mobile phone, a computer, a smart wearable device (for example, a smart watch), and a car display device, which is not limited by the embodiment of the present invention.

[0086] Among them, the display device may be provided with a viewing angle switching button for the user to send a viewing angle switching request signal to the display device, thereby causing the display device to enter the first driving mode. The viewing angle switching button may be a physical button, which may be provided on the housing of the display device so that the user can send a viewing angle switching request to the display device by touching or the like; the viewing angle switching button may also be a viewing angle switching function in software control or an application (APP). The viewing angle switching request is input through the software or APP. Then, the first driving mode is entered, and the user can also adjust the anti-peeping gear through the above-mentioned viewing angle switching button.

[0087] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments herein, and that various obvious changes, readjustments, combinations and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A display panel, It is characterized in that It comprises a first substrate and a second substrate which are arranged opposite to each other, a liquid crystal layer located between the first substrate and the second substrate, and a driving chip located on the second substrate; A plurality of anti-peeping electrodes are disposed on a side of the first substrate facing the liquid crystal layer, and the anti-peeping electrodes are electrically connected to the driving chip; The display panel includes a first driving mode, and the driving chip is used to transmit a first voltage signal to the anti-peeping electrode in a partial period of time under the first driving mode, so that the display panel displays at a narrow viewing angle; The second substrate further includes a plurality of data lines and a gating module; the plurality of data lines extend along a first direction and are arranged along a second direction, and the first direction and the second direction intersect; one end of the gating module is electrically connected to the driving chip, and the other end of the gating module is electrically connected to the anti-peeping electrode and the data line, and the gating module is used to gating the data line and the driving chip, or gating the anti-peeping electrode and the driving chip; or, The second substrate further includes a detection signal line; one end of the detection signal line is electrically connected to the driving chip, and the other end of the detection signal line is electrically connected to the anti-peeping electrode; The anti-peeping electrodes are in a strip shape, extend along a first direction and are arranged along a second direction, and any two adjacent anti-peeping electrodes along the second direction receive the first voltage signal with opposite polarities.

2. The display panel according to claim 1, It is characterized in that When the second substrate includes the gating module, the gating module includes a plurality of selectors, and the selectors include an input terminal, a first output terminal, and a second output terminal; The input end is electrically connected to the driving chip, the first output end is electrically connected to the data line, and the second output end is electrically connected to the anti-peeping electrode.

3. The display panel according to claim 1, It is characterized in that The display panel further comprises a plurality of conductive structures, wherein the conductive structures are located between the first substrate and the second substrate; When the anti-peeping electrode is in a strip shape, the anti-peeping electrode is electrically connected to the driving chip through the conductive structure.

4. The display panel according to claim 1, It is characterized in that The first substrate further includes a color resist layer, the color resist layer is located on a side of the anti-peeping electrode away from the liquid crystal layer, and the color resist layer includes a color resist and a black matrix; The orthographic projection of the anti-peeping electrode on the first substrate is located within the coverage range of the orthographic projection of the black matrix on the first substrate.

5. The display panel according to claim 1, It is characterized in that The first substrate further includes a color resist layer, the color resist layer is located on a side of the anti-peeping electrode away from the liquid crystal layer, and the color resist layer includes a color resist and a black matrix; The anti-peeping electrode is formed of a transparent conductive material, and an orthographic projection of the anti-peeping electrode on the first substrate is located within a coverage range of an orthographic projection of the color resist on the first substrate.

6. A method for driving a display panel, It is characterized in that Used to drive the display panel according to any one of claims 1 to 5; The display panel includes a first driving mode, and the driving method includes: A first voltage signal is transmitted to the anti-peeping electrode in a partial period of time under the first driving mode, so that the display panel displays at a narrow viewing angle.

7. The driving method according to claim 6, It is characterized in that The second substrate further includes a plurality of data lines and a gating module; the plurality of data lines extend along a first direction and are arranged along a second direction; the first direction and the second direction intersect; one end of the gating module is electrically connected to the driving chip, and the other end of the gating module is electrically connected to the anti-peeping electrode and the data line; The first driving mode includes at least one first stage and at least one second stage; Transmitting a first voltage signal to the anti-peeping electrode in a partial period of time under the first driving mode so that the display panel displays at a narrow viewing angle includes: In the first stage, the data line and the driving chip are selected by the selection module to transmit a second voltage signal to the data line; In the second stage, the gating module is used to gating the anti-peeping electrode and the driving chip, so as to transmit the first voltage signal to the anti-peeping electrode.

8. The driving method according to claim 7, It is characterized in that The gating module includes a plurality of selectors, each of which includes an input end, a first output end, and a second output end; the input end is electrically connected to the driving chip, the first output end is electrically connected to the data line, and the second output end is electrically connected to the anti-peeping electrode; In the first stage, the data line and the driving chip are selected by the selection module to transmit the second voltage signal to the data line, including: In the first stage, the input terminal is controlled to be connected to the first output terminal, so as to transmit the second voltage signal to the data line through the gating module; In the second stage, the gating module is used to gate the anti-peeping electrode and the driving chip to transmit the first voltage signal to the anti-peeping electrode, including: In the second stage, the input terminal is controlled to be connected to the second output terminal, so as to transmit the first voltage signal to the anti-peeping electrode through the gating module.

9. The driving method according to claim 7, It is characterized in that The display panel further includes a second driving mode; and the driving method further includes: In the second driving mode, the data line and the driving chip are selected by the selection module to transmit the second voltage signal to the data line, so that the display panel can display at a wide viewing angle.

10. The driving method according to claim 7, It is characterized in that The first driving mode further includes a touch period, and the touch period does not overlap with the first stage; the driving method further includes: In the touch control period, the gating module is used to gate the anti-peeping electrode and the driving chip, so as to transmit the first voltage signal to the anti-peeping electrode.

11. The driving method according to claim 6, It is characterized in that The second substrate further includes a detection signal line, the detection signal line is close to the driving chip; the detection signal line is used to electrically connect the anti-peeping electrode and the driving chip; The transmitting a first voltage signal to the anti-peeping electrode in a partial period under the first driving mode so that the display panel displays at a narrow viewing angle includes: The first voltage signal is transmitted to the anti-peeping electrode through the detection signal line in a partial period under the first driving mode, so that the display panel displays at a narrow viewing angle.

12. The driving method according to claim 11, It is characterized in that The display panel further includes a second driving mode; and the driving method further includes: In the second driving mode, the detection signal line is controlled to float, so that the display panel displays at a wide viewing angle.

13. The driving method according to claim 6, It is characterized in that The anti-peeping electrode is in a strip shape, and the anti-peeping electrode extends along a first direction and is arranged along a second direction; wherein the first direction intersects with the second direction; Transmitting a first voltage signal to the anti-peeping electrode in a partial period of time under the first driving mode so that the display panel displays at a narrow viewing angle includes: The first voltage signal with opposite polarities is transmitted to any two adjacent anti-peeping electrodes along the second direction in a partial period of time under the first driving mode.

14. A display device, It is characterized in that Comprising a display panel as described in any one of claims 1 to 5.

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