A display panel, a driving method and a display device

Abstract

The present application discloses a display panel, a driving method and a display device, which relate to the field of display technology and can realize the switch function of the anti-peeping mode of the display panel, and can switch the anti-peeping mode and the normal display mode as needed. A display panel includes: a substrate layer; a plurality of pixel structures, arranged on one side of the substrate layer; an electrochromic integrated layer, arranged on the side of the pixel structure away from the substrate layer; the electrochromic integrated layer includes a first electrode and an electrochromic layer, the first electrode has a first hollow area, the orthographic projection of the first hollow area on the substrate layer covers the orthographic projection of the pixel structure on the substrate layer, and the orthographic projection of the first electrode on the substrate layer covers the orthographic projection of the pixel defining structure on the substrate layer; the first electrode is used to control the color of the electrochromic layer in the corresponding area to become darker under the drive of a driving signal.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display panel, a driving method and a display device. Background Art

[0002] At present, information security and user privacy are increasingly valued by users. However, while enjoying the large screen and wide viewing angle display effect, users also face the risk of privacy leakage. In order to prevent others from seeing the contents of the screen from the side of the display, an anti-peep film is usually applied to the display. However, the anti-peep film will keep the display in anti-peeping mode and the anti-peeping mode cannot be turned off. When the user is in a hidden environment and does not need the anti-peeping mode, the convenience of the wide viewing angle of the display will be lost. Summary of the invention

[0003] The embodiments of the present application provide a display panel, a driving method and a display device, which can realize the switch function of the anti-peeping mode of the display panel and can switch the anti-peeping mode and the normal display mode as needed.

[0004] According to a first aspect of an embodiment of the present application, a display panel is provided, comprising:

[0005] substrate layer;

[0006] A plurality of pixel structures are arranged on one side of the substrate layer;

[0007] An electrochromic integrated layer is arranged on a side of the pixel structure away from the substrate layer;

[0008] The electrochromic integrated layer comprises a first electrode and an electrochromic layer, the first electrode has a first hollow region, the orthographic projection of the first hollow region on the substrate layer covers the orthographic projection of the pixel structure on the substrate layer, and the orthographic projection of the first electrode on the substrate layer covers the orthographic projection of the pixel defining structure on the substrate layer;

[0009] The first electrode is used to control the color of the electrochromic layer in the corresponding area to become darker under the drive of a driving signal.

[0010] In some embodiments, a pixel defining structure is disposed between adjacent pixel structures, and an orthographic projection of the first electrode on the substrate layer covers an orthographic projection of the pixel defining structure on the substrate layer.

[0011] In some embodiments, the first electrode includes at least two groups of sub-electrodes, and the sub-electrodes in each group are insulated from each other.

[0012] In some embodiments, different groups of the sub-electrodes are used to receive different driving signals.

[0013] In some embodiments, at least two groups of the sub-electrodes surround different pixel structures.

[0014] In some embodiments, when the same pixel structure is surrounded by at least two groups of the sub-electrodes, on a cross section cut by a line connecting two adjacent pixel structures, any group of the sub-electrodes is disposed between other groups of the sub-electrodes.

[0015] In some embodiments, the first electrode includes a first group of sub-electrodes, a second group of sub-electrodes, and a third group of sub-electrodes;

[0016] On a cross section cut by a line connecting two adjacent pixel structures, the second group of sub-electrodes includes at least two, the third group of sub-electrodes includes at least two, and the sub-electrodes in the same group are electrically connected to each other;

[0017] On a cross section cut by a line connecting two adjacent pixel structures, the first group of sub-electrodes is located between at least two of the second group of sub-electrodes, and the second group of sub-electrodes is located between at least two of the third group of sub-electrodes.

[0018] In some embodiments, on a cross section cut by a line connecting two adjacent pixel structures, at least two of the second group of sub-electrodes on both sides of the first group of sub-electrodes are symmetrical with respect to the first group of sub-electrodes; and / or,

[0019] On a cross section cut by a line connecting two adjacent pixel structures, at least two of the third group of sub-electrodes on both sides of the first group of sub-electrodes are symmetrical with respect to the first group of sub-electrodes.

[0020] In some embodiments, in the direction of the connection line of two adjacent pixel structures, the size of a single electrode of the second group of sub-electrodes and the size of a single electrode of the third group of sub-electrodes are both smaller than the size of the first group of sub-electrodes.

[0021] In some embodiments, the display panel further includes:

[0022] A plurality of pixel units, each pixel unit comprising a plurality of pixel structures, wherein at least two pixel structures in the same pixel unit are used to emit light of different colors;

[0023] The orthographic projection of the first electrode on the substrate layer surrounds the orthographic projection of the pixel unit on the substrate layer.

[0024] In some embodiments, the electrochromic integrated layer further comprises a second electrode, an ion storage layer, and an ion conducting layer;

[0025] The ion conduction layer is disposed between the ion storage layer and the electrochromic layer, and the ion storage layer, the ion conduction layer and the electrochromic layer are all disposed between the first electrode and the second electrode.

[0026] In some embodiments, the second electrode has a second hollow region, and the orthographic projection of the second hollow region on the substrate layer covers the orthographic projection of the pixel structure on the substrate layer;

[0027] An orthographic projection of the second electrode on the substrate layer covers an orthographic projection of the pixel defining structure on the substrate layer.

[0028] In some embodiments, the second electrode comprises a transparent conductive material; and / or,

[0029] The first electrode includes a transparent conductive material.

[0030] In some embodiments, the display panel further includes:

[0031] A first lead, one end of which is electrically connected to the first electrode, and the other end of which is used to be electrically connected to a driving chip;

[0032] a second lead, one end of which is electrically connected to the second electrode, and the other end of which is used to electrically connect to the driving chip;

[0033] The first lead and the second lead both surround all the pixel structures.

[0034] In some embodiments, the display panel further includes:

[0035] A color filter film is disposed between the substrate layer and the electrochromic integrated layer, the color filter film comprises a light shielding structure and a color optical source, the light shielding structure is disposed between adjacent color optical sources, and the orthographic projection of the light shielding structure on the substrate layer falls within the orthographic projection of the pixel defining structure on the substrate layer;

[0036] and / or,

[0037] The touch function layer is arranged on a side of the electrochromic integrated layer away from the substrate layer.

[0038] In some embodiments, in the direction of a connection line between two adjacent pixel structures, a size of the light-shielding structure is smaller than or equal to a size of the first electrode.

[0039] In some embodiments, the display panel further includes:

[0040] The polarizer is arranged on a side of the electrochromic integrated layer away from the substrate layer.

[0041] In some embodiments, the pixel structure includes a light emitting device.

[0042] In some embodiments, the first electrode is used to control the color of the electrochromic layer in a corresponding area to turn black under the driving of a driving signal.

[0043] According to a second aspect of an embodiment of the present application, there is provided an anti-peeping driving method for a display panel, which is applied to the display panel according to the first aspect, and the method comprises:

[0044] According to the anti-peeping opening instruction, transmitting a driving signal to the first electrode corresponding to the anti-peeping opening instruction;

[0045] Based on the driving signal, controlling the color of the corresponding electrochromic layer to become darker;

[0046] and, according to an anti-peeping closing instruction, stopping transmitting the driving signal to the first electrode corresponding to the anti-peeping closing instruction;

[0047] Based on the disappearance of the driving signal, the color of the corresponding electrochromic layer becomes lighter.

[0048] In some embodiments, when the first electrode includes at least two groups of sub-electrodes, the method further includes:

[0049] According to the anti-peeping adjustment instruction, a driving signal is transmitted to the target sub-electrode, or the transmission of the driving signal to the target sub-electrode is stopped, or the size of the driving signal of the target sub-electrode is adjusted, wherein the target sub-electrode is at least one group of sub-electrodes of the first electrode.

[0050] In some embodiments, the step of transmitting a driving signal to a first electrode corresponding to the anti-peeping opening instruction according to the anti-peeping opening instruction includes:

[0051] According to the anti-peeping opening instruction, the driving signal is transmitted to the first electrode of the target partition, wherein the first electrode is divided into at least two anti-peeping partitions, and the target partition is any of the anti-peeping partitions.

[0052] According to a third aspect of the embodiments of the present application, a display device is provided, including:

[0053] A display panel as described in the first aspect.

[0054] The display panel provided by the embodiment of the present application is provided with an electrochromic integrated layer on the side of the pixel structure away from the substrate layer, and the first electrode of the electrochromic integrated layer is used to control the color of the electrochromic layer of the corresponding area to become darker under the drive of the driving signal. In the film thickness direction, the first electrode and the pixel boundary structure overlap at least in space, so the first electrode can control the color of the electrochromic layer of the corresponding area to change under the action of the driving signal, and the electrochromic layer with a darker color can absorb light and play a role in shielding light, so the light emitted obliquely by the pixel structure is easily absorbed by the electrochromic layer with a darker color, that is, the brightness of the emitted light at the oblique viewing angle of the display panel is greatly reduced, and it is difficult to see the display screen in the wide viewing angle direction of the display panel, which can play an anti-peeping effect. When the first electrode does not receive the driving signal, the color of the electrochromic layer does not change, and the electrochromic layer has good light transmittance when the color does not change, and will not affect the normal display of the display panel. The state of the first electrode being applied with a driving signal can be used as a switch of the anti-peeping mode, which can realize the switch switching of the anti-peeping mode of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] Figure 1 A schematic partial structural diagram of a display panel provided in an embodiment of the present application;

[0056] Figure 2 A schematic structural diagram of an anti-peeping film provided in an embodiment of the present application;

[0057] Figure 3 A schematic structural diagram of a first electrode provided in an embodiment of the present application;

[0058] Figure 4 A schematic partial structural diagram of another display panel provided in an embodiment of the present application;

[0059] Figure 5 A schematic partial structural diagram of another display panel provided in an embodiment of the present application;

[0060] Figure 6 A schematic partial structural diagram of another display panel provided in an embodiment of the present application;

[0061] Figure 7 A schematic partial structural diagram of a display panel provided in an embodiment of the present application;

[0062] Figure 8 A schematic structural diagram of a pixel unit of a display panel provided in an embodiment of the present application;

[0063] Fig. 9 A schematic diagram of the positional relationship between a pixel unit and a first electrode of a display panel provided in an embodiment of the present application;

[0064] Fig.10 A schematic diagram of the positional relationship between a pixel unit and a first electrode of a display panel provided in an embodiment of the present application;

[0065] Fig.11 A schematic diagram of a cross-sectional structure of a display panel along MN provided in an embodiment of the present application;

[0066] Fig.12 A schematic structural diagram of a display panel provided in an embodiment of the present application;

[0067] Fig.13 A schematic flow chart of an anti-peeping driving method for a display panel provided in an embodiment of the present application;

[0068] Fig.14 A schematic structural diagram of a display device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0069] In order to better understand the technical solutions provided by the embodiments of this specification, the technical solutions of the embodiments of this specification are described in detail below through the accompanying drawings and specific embodiments. It should be understood that the embodiments of this specification and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of this specification, rather than limitations on the technical solutions of this specification. In the absence of conflict, the embodiments of this specification and the technical features in the embodiments can be combined with each other.

[0070] In this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or equipment. In the absence of more restrictions, the elements limited by the statement "comprise one..." do not exclude the existence of other identical elements in the process, method, article or equipment including the elements. The term "more than two" includes two or more than two situations.

[0071] At present, information security and user privacy are increasingly valued by users. However, while enjoying the large screen and wide viewing angle display effect, users also face the risk of privacy leakage. In order to prevent others from seeing the contents of the screen from the side of the display, an anti-peep film is usually applied to the display. However, the anti-peep film will keep the display in anti-peeping mode and the anti-peeping mode cannot be turned off. When the user is in a hidden environment and does not need the anti-peeping mode, the convenience of the wide viewing angle of the display will be lost.

[0072] In view of this, the embodiments of the present application provide a display panel, a driving method and a display device, which can realize the switch function of the anti-peeping mode of the display panel, and can switch the anti-peeping mode and the normal display mode as needed.

[0073] According to a first aspect of an embodiment of the present application, a display panel is provided. Figure 1 This is a schematic partial structural diagram of a display panel provided in an embodiment of the present application. Figure 1 As shown, the display panel provided by the embodiment of the present application includes: a substrate layer 100, a plurality of pixel structures 200, a pixel defining structure 300 and an electrochromic integrated layer 400, wherein the plurality of pixel structures 200 are arranged on one side of the substrate layer 100, and a pixel defining structure 300 is arranged between adjacent pixel structures 200. Exemplarily, the plurality of pixel structures 200 may be arranged in an array, and the pixel structure 200 may include a light-emitting device, and the display panel is an active light-emitting display panel, and the light-emitting device may be a light-emitting diode. The pixel structure 200 may also include a pixel electrode, and the pixel electrode is used to control the rotation of the liquid crystal under the drive of a driving signal, so as to realize the picture display by controlling the transmittance of the backlight, and the display panel is a passive light-emitting display panel. The electrochromic integrated layer 400 is arranged on a side of the pixel structure 200 away from the substrate layer 100. The electrochromic integrated layer 400 includes a first electrode 410 and an electrochromic layer 420. The first electrode 410 has a first hollow area 411. The orthographic projection of the first hollow area 411 on the substrate layer 100 covers the orthographic projection of the pixel structure 200 on the substrate layer 100. The coverage may be full coverage or partial coverage, which is not specifically limited in the embodiment of the present application. The orthographic projection of the first electrode 410 on the substrate layer 100 covers the orthographic projection of the pixel defining structure 300 on the substrate layer 100. There is no luminous line emitted in the area where the pixel defining structure 300 is located, and the pixel structure 200 is used to emit light. Exemplarily, the pixel structure 200 may include a red pixel structure R, a green pixel structure G, and a blue pixel structure B. Based on the color mixing principle of the three primary colors of red, green, and blue, the display of a color picture can be realized. The first electrode 410 is used to control the color of the electrochromic layer 420 in the corresponding area to become darker under the drive of a driving signal, such as Figure 1As shown, the color of the area of ​​the electrochromic layer 420 corresponding to the first electrode 410 is darker than the color of other areas, and can be black, for example. In the film thickness direction, the first electrode 410 and the pixel defining structure 300 overlap at least in space, so the first electrode 410 can control the color of the electrochromic layer 420 in the corresponding area to change under the action of the driving signal. The darkened electrochromic layer 420 can absorb light and play a role in shielding light. The light emitted obliquely from the pixel structure 200 is easily absorbed by the darkened electrochromic layer 420, that is, the brightness of the emitted light at the oblique viewing angle of the display panel is greatly reduced, and it is difficult to see the display screen in the wide viewing angle direction of the display panel, which can play an anti-peeping effect. When the first electrode 410 does not receive a driving signal, the color of the electrochromic layer 420 does not change. When the electrochromic layer 420 does not change color, it has good light transmittance and will not affect the normal display of the display panel. When the first electrode 410 receives a driving signal, the color of the electrochromic layer 420 corresponding to the hollow area 411 of the first electrode 410 will not change, and will not affect the light emission at the normal viewing angle of the display panel, and the user can see the display screen at the normal viewing angle. The first electrode 410 is applied with a driving signal to turn on the anti-peeping mode. The first electrode 410 is not applied with a driving signal, and the anti-peeping mode can be kept closed. The state of the first electrode 410 being applied with a driving signal can be used as a switch of the anti-peeping mode, and the switch of the anti-peeping mode of the display panel can be realized. Since the area where the first electrode 410 is located corresponds to the area where the pixel defining structure 300 is located, the first electrode 410 surrounds the pixel structure 200, and under the control of the driving signal, the color of the electrochromic layer 420 around the pixel structure 200 can be controlled to become darker, and the light around the pixel structure 200 can be absorbed and blocked, so that anti-peeping with a wide viewing angle in all directions up, down, left, and right can be realized.

[0074] For example, the critical point at which the color of the electrochromic layer 420 becomes darker may be when the light transmittance is less than 10%, and the critical point at which the color of the electrochromic layer 420 gradually becomes lighter from dark may be when the light transmittance is greater than 80%.

[0075] It should be noted that the electrochromic integrated layer 400 is disposed on the side of the pixel structure 200 away from the substrate layer 100 , which can be understood as the electrochromic integrated layer 400 is disposed on the light-emitting side of the pixel structure 200 , which can be beneficial to the realization of the anti-peeping function.

[0076] It should be noted that by setting a columnar electrochromic structure on both sides of the light-emitting device, the anti-peeping function of the large viewing angles on the left and right sides can be achieved, but the anti-peeping effect for the large viewing angles up and down is poor. Covering the surface of the display panel with an anti-peeping film can also play an all-round anti-peeping role, but the traditional anti-peeping film is a vertical grid-shaped black film that can block light at a large viewing angle to achieve the purpose of anti-peeping, but the film does not have a switch, and when the user obtains privacy protection, the convenience of a wide viewing angle is lost. At the same time, the anti-peeping film can only prevent peeping from the left and right viewing angles, and the anti-peeping ability of the large viewing angles in the upper and lower directions is poor. In addition, the columnar electrochromic structure process is difficult to achieve a high-resolution display panel. The process is relatively complex and difficult to process. It is difficult to be compatible with the stacking of other film layers. The feasibility on the display module screen is also relatively low, the production cost is high, and the mass production is poor.

[0077] For example, Figure 2 This is a schematic structural diagram of an anti-peeping film provided in an embodiment of the present application. Figure 2 As shown, the anti-peeping structure of the anti-peeping film F0 extends up and down, that is, the anti-peeping effect is mainly aimed at the left and right, but in large-size displays or places with dense personnel, anti-peeping in the up and down directions is also very important. Figure 3 Schematic diagram of the structure of the first electrode provided in the embodiment of the present application. Figure 3 As shown, the shape of the first electrode 410 is mesh-like. Figure 3 The diagram shows a quadrilateral grid, and the grid shape of the first electrode 410 can be set according to the shape of the pixel structure. The grid-shaped first electrode 410 can achieve anti-peeping at multiple angles such as top, bottom, left, right, top, left, bottom, top, right, and bottom.

[0078] In the display panel provided by the embodiment of the present application, an electrochromic integrated layer 400 is arranged on the side of the pixel structure 200 away from the substrate layer 100, and the first electrode 410 of the electrochromic integrated layer 400 is used to control the color of the electrochromic layer 420 in the corresponding area to become darker under the drive of the driving signal. In the film thickness direction, the first electrode 410 and the pixel defining structure 300 overlap at least in space, so the first electrode 410 can control the color of the electrochromic layer 420 in the corresponding area to change under the action of the driving signal, and the electrochromic layer 420 with a darker color can absorb light and play a role in shielding light, so the light emitted obliquely from the pixel structure 200 is easily absorbed by the electrochromic layer 420 with a darker color, that is, the brightness of the emitted light at the oblique viewing angle of the display panel is greatly reduced, and it is difficult to see the display screen in the direction of the large viewing angle of the display panel, which can play an anti-peeping effect. When the first electrode 410 does not receive a driving signal, the color of the electrochromic layer 420 does not change. When the electrochromic layer 420 does not change color, it has good light transmittance and does not affect the normal display of the display panel. The state of the first electrode 410 being applied with a driving signal can be used as a switch of the anti-peeping mode, and the anti-peeping mode of the display panel can be switched on and off.

[0079] In some embodiments, Figure 4 This is a schematic partial structural diagram of another display panel provided in an embodiment of the present application. Figure 4 As shown, the electrochromic integrated layer 400 also includes a second electrode 430, an ion storage layer 440 and an ion conduction layer 450, the ion conduction layer 450 is arranged between the ion storage layer 440 and the electrochromic layer 420, and the ion storage layer 440, the ion conduction layer 450 and the electrochromic layer 420 are all arranged between the first electrode 410 and the second electrode 430.

[0080] Exemplarily, different driving voltages can be applied to the first electrode 410 and the second electrode 430. The voltage difference can form an electric field between the first electrode 410 and the second electrode 430. Under the action of the electric field, the ions collected by the ion storage layer 440 are precipitated and conducted to the electrochromic layer 420 through the ion conduction layer 450. The electrochromic layer 420 in the corresponding area of ​​the first electrode 410 can change from transparent to black. When a reverse voltage difference is applied, ions are precipitated from the electrochromic layer 420, pass through the ion conduction layer 450, and return to the ion storage layer 440. At this time, the electrochromic layer 420 will become transparent again. It should be noted that the color of the electrochromic layer 420 changes from transparent to dark, so as to achieve a light-shielding effect, such as Figure 4The arrows shown indicate the optical path of the light emitted from the pixel structure 200. The light emitted from the side view is blocked and absorbed by the blackened electrochromic layer 420. Driven by the first electrode 410 and the second electrode 430, the electrochromic layer 420 turns black and absorbs more light, resulting in a better anti-peeping effect.

[0081] Exemplarily, the second electrode 430 includes a transparent conductive material, and the first electrode 410 includes a transparent conductive material. The transparent electrode material may be indium tin oxide, which is not specifically limited in the embodiments of the present application. It may not affect the light emitted by the pixel structure 200 from the display panel, and when the electrochromic layer 420 is in a closed state, that is, in a transparent state, it does not affect the wide viewing angle display of the display panel. The second electrode 430 may also be made of PEDOT (polymer of 3,4-ethylenedioxythiophene monomer), which can be easily coated for large-area production without the need for high-temperature processes, and can protect organic light-emitting materials.

[0082] The display panel provided in the embodiment of the present application uses a grid-shaped first electrode 410 as the top electrode of the electrochromic integrated layer 400. The grid-shaped first electrode 410 bypasses the OLED opening to ensure that the light of the pixel structure 200 is normally emitted.

[0083] In some embodiments, Figure 5 A schematic partial structural diagram of another display panel provided in an embodiment of the present application. Figure 5 As shown, the second electrode 430 has a second hollow area 431, and the orthographic projection of the second hollow area 431 on the substrate layer 100 covers the orthographic projection of the pixel structure 200 on the substrate layer 100; the orthographic projection of the second electrode 430 on the substrate layer 100 covers the orthographic projection of the pixel defining structure 300 on the substrate layer 100. The coverage can be partial coverage or full coverage, which is not specifically limited in the embodiment of the present application. The second electrode 430 is made into a grid shape, which can better drive the color change of the electrochromic layer 420 on the pixel defining structure 300, and the boundary of the color change area is clearer. The second hollow area 431 can be provided with a transparent optical film layer, which is not specifically limited in the embodiment of the present application.

[0084] In some embodiments, Figure 6 A schematic partial structural diagram of another display panel provided in an embodiment of the present application. Figure 6As shown, the display panel provided by the embodiment of the present application further includes: a color filter film 500, the color filter film 500 is arranged between the substrate layer 100 and the electrochromic integrated layer 400, and the color filter film 500 includes a light shielding structure 510 and color photoresists. Exemplarily, the color photoresists can be provided with red photoresists r, green photoresists g and blue photoresists b corresponding to the colors of the light emitted by the pixel structure 200. The light shielding structure 510 is arranged between adjacent color photoresists, and the orthographic projection of the light shielding structure 510 on the substrate layer 100 falls into the orthographic projection of the pixel defining structure 300 on the substrate layer 100. It should be noted that the positions of the first electrode 410, the light shielding structure 510 and the pixel defining structure 300 are all corresponding. The width of the light shielding structure 510 can be less than or equal to the width of the first electrode 410, that is, in the direction where the connection line of two adjacent pixel structures 200 is located, the size of the light shielding structure 510 is less than or equal to the size of the first electrode 410. Since the shading structure 510 is closer to the pixel structure 200 than to the first electrode 410, the shading structure 510 does not need to be too wide, and can achieve the function of the color filter film 500. If the shading structure 510 is too wide, it will affect the amount of light emitted by the pixel structure 200 at the normal viewing angle, thereby affecting the display effect at the normal viewing angle.

[0085] In some embodiments, Figure 7 This is a schematic partial structural diagram of a display panel provided in an embodiment of the present application. Figure 7 As shown, the display panel provided in the embodiment of the present application further includes a touch function layer 600 and a polarizer 700. The touch function layer 600 is arranged on a side of the electrochromic integrated layer 400 away from the substrate layer 100, and the polarizer 700 is arranged on a side of the electrochromic integrated layer 400 away from the substrate layer 100. Figure 7 As shown, the touch function layer 600 is disposed between the electrochromic integrated layer 400 and the polarizer 700, which is only schematic. The polarizer can also be disposed between the touch function layer and the electrochromic integrated layer, which is not specifically limited in the embodiment of the present application. Exemplarily, the polarizer 700 can replace the color filter film for filtering and reducing reflection. The touch function layer 600 can be provided with a touch electrode for realizing touch control.

[0086] In some embodiments, the display panel includes a plurality of pixel units, each pixel unit includes a plurality of pixel structures 200, and at least two pixel structures 200 in the same pixel unit are used to emit light of different colors. Figure 8 The schematic structure diagram of a pixel unit of a display panel provided in an embodiment of the present application is shown in FIG. Figure 8As shown, the pixel unit 201 includes a red pixel structure R, a green pixel structure G and a blue pixel structure B. Based on the color mixing principle of the three primary colors of red, green and blue, one pixel unit 201 may include two green pixel structures G, which can achieve the required color coordinate adjustment range. The orthographic projection of the first electrode 410 on the substrate layer 100 surrounds the orthographic projection of the pixel structure on the substrate layer 100, and each pixel structure is surrounded by the first electrode 410.

[0087] In some embodiments, the orthographic projection of the first electrode 410 on the substrate layer 100 surrounds the orthographic projection of the pixel unit on the substrate layer 100. The anti-peeping angle of the first electrode 410 around a single pixel structure 200 and the anti-peeping angle of the first electrode 410 around a single pixel unit are different, and the size of the first electrode grid can be set according to the specific anti-peeping angle requirements.

[0088] For example, Fig. 9 Schematic diagram of the positional relationship between a pixel unit and a first electrode of a display panel provided in an embodiment of the present application. Fig. 9 As shown, the first electrode 410 surrounds a single pixel unit 201 .

[0089] In some embodiments, the first electrode includes at least two groups of sub-electrodes, and each group of sub-electrodes is insulated from each other. Different groups of sub-electrodes are used to receive different drive signals, and the insulated sub-electrodes can be driven separately, which can be used to adjust the anti-peeping angle. Exemplarily, different drive signals can generate electric fields of different strengths, which can control the electrochromic layer 420 to produce different degrees of color changes, thereby affecting the anti-peeping angle.

[0090] In some embodiments, at least two groups of sub-electrodes surround different pixel structures. Exemplarily, the first electrode 410 includes a first group of sub-electrodes, a second group of sub-electrodes, and a third group of sub-electrodes. The first group of sub-electrodes can surround the red pixel structure R, the second group of sub-electrodes surround the green pixel structure G, and the third group of sub-electrodes surround the blue pixel structure B. By individually controlling different groups of sub-electrodes, anti-peeping control of different sub-pixels can be achieved. Anti-peeping control can be performed for a single monochrome picture or single monochrome chromaticity, and the anti-peeping effect and degree can be controlled more flexibly.

[0091] In some embodiments, when at least two groups of sub-electrodes surround the same pixel structure, any group of sub-electrodes is disposed between other groups of sub-electrodes on a cross section cut by a line connecting two adjacent pixel structures. Different groups of sub-electrodes may surround the same pixel structure, and controlling the drive signals of different groups of sub-electrodes may control the discoloration width of the electrochromic layer, thereby achieving flexible adjustment of different anti-peeping angles. At least one group of sub-electrodes includes at least two sub-electrodes, and any group of sub-electrodes is disposed between two sub-electrodes, which may control the width of the anti-peeping discoloration area.

[0092] For example, Fig.10 A schematic diagram of the positional relationship between a pixel unit and a first electrode of a display panel provided in an embodiment of the present application; Fig.11 A schematic diagram of a cross-sectional structure of a display panel along MN provided in an embodiment of the present application. Fig.10 and Fig.11 , the first electrode includes a first group of sub-electrodes 401, a second group of sub-electrodes 402 and a third group of sub-electrodes 403. Fig.11 As shown, on the cross section MN cut by the line connecting two adjacent pixel structures, the second group of sub-electrodes 402 includes two, the third group of sub-electrodes 403 includes two, and the sub-electrodes of the same group are electrically connected to each other, that is, the two second group of sub-electrodes 402 can receive the same driving signal, that is, they are connected in series. Similarly, the two third group of sub-electrodes 403 are connected in series. On the cross section cut by the line connecting two adjacent pixel structures, the first group of sub-electrodes 401 are located between the two second group of sub-electrodes 402, and the second group of sub-electrodes 402 are located between the two third group of sub-electrodes 403. Exemplarily, as Fig.11 As shown, on the cross section cut by the line connecting two adjacent pixel structures, the two second-group sub-electrodes 402 on both sides of the first-group sub-electrodes 401 are symmetrical about the first-group sub-electrodes 401, and the two third-group sub-electrodes 403 on both sides of the first-group sub-electrodes 401 are symmetrical about the first-group sub-electrodes 401.

[0093] Exemplarily, the first group of sub-electrodes 401, the second group of sub-electrodes 402, and the third group of sub-electrodes 403 can control which specific group of sub-electrodes to transmit the driving signal to, and control the size of the driving signal according to different anti-peeping effect requirements. The larger the driving signal, the stronger the electric field, the deeper the color change, and the wider the width. For example, if the driving signal is transmitted to the first group of sub-electrodes 401 alone, and the second group of sub-electrodes 402 and the third group of sub-electrodes 403 do not transmit the driving signal, the color change width of the electrochromic layer is the first width; if the driving signal is transmitted to the first group of sub-electrodes 401 and the second group of sub-electrodes 402 at the same time, the color change width of the electrochromic layer is the second width, and the numerical values ​​and size relationship of the driving signals corresponding to the two groups of sub-electrodes will affect the value of the second width; if the driving signal is transmitted to the first group of sub-electrodes 401, the second group of sub-electrodes 402, and the third group of sub-electrodes 403 at the same time, the color change width of the electrochromic layer is the third width, and the numerical values ​​and size relationship of the driving signals corresponding to the three groups of sub-electrodes will affect the third width. The first width is smaller than the second width, and the second width is smaller than the third width. The color change width of the electrochromic layer corresponding to the second group of sub-electrodes 402 driven alone is the fourth width, which is smaller than the second width; the color change width of the electrochromic layer corresponding to the third group of sub-electrodes 403 driven alone is the fifth width, which is smaller than the third width; the magnitude relationship between the fifth width and the fourth width may depend on the width of the electrode. Therefore, the color change width of the electrochromic layer 420 is controlled by driving different groups of sub-electrodes or a combination of different groups of sub-electrodes.

[0094] It should be noted that the overlapping regions between different groups of sub-electrodes may be isolated by an insulating layer, and different groups of sub-electrodes may be manufactured by different process steps.

[0095] For example, Fig.11 As shown, in the direction of the connection line of two adjacent pixel structures, the size of a single electrode of the second group of sub-electrodes 402 and the size of a single electrode of the third group of sub-electrodes 403 are both smaller than the size of the first group of sub-electrodes 401. The first group of sub-electrodes 401 can be used as the main driving electrodes, and the second group of sub-electrodes 402 and the third group of sub-electrodes 403 can be used as auxiliary driving electrodes, which are used to flexibly adjust the color change width to achieve different anti-peeping width adjustments.

[0096] Exemplary, reference Fig.10 and Fig.11, the first group of sub-electrodes 401, the second group of sub-electrodes 402 and the third group of sub-electrodes respectively form four pixel structures surrounding the same pixel unit, namely four grids of GGRB, corresponding to the same pixel structure, for example, R, the hollow area area corresponding to the first group of sub-electrodes 401 is larger than the hollow area area corresponding to the second group of sub-electrodes 402, and larger than the hollow area area corresponding to the third group of sub-electrodes 403. The first group of sub-electrodes 401, the second group of sub-electrodes 402 and the third group of sub-electrodes 403 are set with different hollow areas, which are used to flexibly adjust the color change width to achieve different anti-peeping width adjustments.

[0097] Exemplary, reference Fig.10 and Fig.11 , the first group of sub-electrodes 401, the second group of sub-electrodes 402 and the third group of sub-electrodes respectively form four pixel structures surrounding the same pixel unit, namely four grids of GGRB. In the same pixel unit, the hollow area area of ​​the first group of sub-electrodes 401 corresponding to the blue pixel structure B is larger than the hollow area area of ​​the first group of sub-electrodes 401 corresponding to the red pixel structure R, and larger than the hollow area area of ​​the first group of sub-electrodes 401 corresponding to the green pixel structure G. Similarly, the hollow area area of ​​the second group of sub-electrodes 402 corresponding to the blue pixel structure B is larger than the hollow area area of ​​the second group of sub-electrodes 402 corresponding to the red pixel structure R, and larger than the hollow area area of ​​the second group of sub-electrodes 402 corresponding to the green pixel structure G. The hollow area area of ​​the third group of sub-electrodes 403 corresponding to the blue pixel structure B is larger than the hollow area area of ​​the third group of sub-electrodes 403 corresponding to the red pixel structure R, and larger than the hollow area area of ​​the third group of sub-electrodes 403 corresponding to the green pixel structure G.

[0098] Exemplary, reference Fig.10 and Fig.11 The first group of sub-electrodes 401 , the second group of sub-electrodes 402 and the third group of sub-electrodes are located in different layers respectively, and the first group of sub-electrodes 401 is closer to the substrate layer 100 than the second group of sub-electrodes 402 and the third group of sub-electrodes.

[0099] For example, the spacing between pixel structures is 19μm-23μm. If pixel-level anti-peeping is required, when ITO is used as the first electrode, the line width of the first electrode can be between 5um-15um according to the viewing angle required for anti-peeping. In the case of multiple groups of sub-electrodes, the width of a single sub-electrode can be 5um-15um. The density between different groups of sub-electrodes can be selected according to the process capability to achieve large pixel-level anti-peeping or sub-pixel-level anti-peeping. Generally, large pixel-level anti-peeping should be able to meet the anti-peeping performance.

[0100] Exemplarily, the arrangement of multiple groups of sub-electrodes can be regarded as a grid of multiple first electrodes. The overlapping parts between the grids of different groups of sub-electrodes are separated by insulating materials such as SiO2, SiNOx, etc. The multiple grids can be led out with leads and controlled separately. The line spacing of the grid takes the minimum process capability limit, which is generally 2-3um, and the ITO line width can be 5-8um. The insulating material can be set as a whole layer or in a local area. For example, an insulating layer is only set in the overlapping area of ​​the first electrode to isolate the signals of different groups of sub-electrodes. The insulating layer can also be extended to the area where different groups of sub-electrodes do not overlap. This application example is not specifically limited.

[0101] In some embodiments, the display panel further includes: a first lead, one end of which is electrically connected to the first electrode, and the other end of which is used to electrically connect to a driving chip; a second lead, one end of which is electrically connected to the second electrode, and the other end of which is used to electrically connect to the driving chip; and the first lead and the second lead both surround all pixel structures. That is, the first lead and the second lead surround the display area, and the longer the lead length, the lower the resistance, which can reduce the interference of the driving signal and improve the signal uniformity.

[0102] For example, Fig.12 This is a schematic structural diagram of a display panel provided in an embodiment of the present application. Fig.12 As described above, the first lead 460 is led out from the grid of the first electrode 410 and connected to the anti-peeping driver chip IC2 through the first connecting line 480, and the second lead 470 is led out from the second electrode and connected to the anti-peeping driver chip IC2 through the second connecting line 490. The display panel may also include a display driver chip IC1, and the display driver chip IC1 may be bound to the display panel. The display panel may also include a flexible circuit board FPC, and the anti-peeping driver chip IC2 may be bound to the flexible circuit board FPC, which is still exemplary and not a specific limitation of the application.

[0103] It should be noted that Fig.12 The first lead 460 and the second lead 470 are only schematically shown. When the first electrode 410 is set in a grid, the number of the first lead 460 can be set according to different driving signals and driving partitions of the first electrode 410, and each first lead 460 can be used to independently transmit the driving signal; the first electrode 410 can also be partitioned according to different pixels. For example, different pixels of red, green and blue are grouped according to color, and the first electrodes 410 corresponding to all red pixel structures R are led out through the same first lead 460. Similarly, the three first leads 460 can be used to realize independent driving of the first electrodes 410 corresponding to the red, green and blue pixel structures.

[0104] Exemplarily, the first lead 460, the second lead 470, the first connection line 480, and the second connection line 490 may be made of a metal laminate of Ti-AL-Ti. The first lead 460 and the second lead 470 are wound up and down and left and right to minimize voltage drop and improve signal uniformity.

[0105] A second aspect of the embodiments of the present application provides an anti-peeping driving method for a display panel, which is applied to the display panel as described in the first aspect. Fig.13 The following is a schematic flow chart of an anti-peeping driving method for a display panel provided in an embodiment of the present application. Fig.13 As shown, the method includes:

[0106] S901: According to the anti-peeping opening instruction, a driving signal is transmitted to a first electrode corresponding to the anti-peeping opening instruction.

[0107] Step S901 may include:

[0108] According to the anti-peeping opening instruction, a driving signal is transmitted to the first electrode of the target partition, wherein the first electrode is divided into at least two anti-peeping partitions, and the target partition is any anti-peeping partition.

[0109] Exemplarily, the anti-peeping function can be turned on for the key information display position of the display screen. For example, the middle area of ​​the display screen is usually used as the area for displaying key information, and the edge area of ​​the display screen usually does not display key information. The middle area of ​​the display screen can be divided into at least one anti-peeping partition, and the edge area can be divided into at least one anti-peeping partition. The position information of the anti-peeping partition can be added to the instruction sequence of the anti-peeping turning on instruction to realize the partition control of the anti-peeping function.

[0110] S902: Based on the driving signal, control the color of the corresponding electrochromic layer to become darker.

[0111] It should be noted that the degree of color darkening is mainly reflected in the light transmittance, which in turn affects the anti-peeping effect. The degree of color darkening can be controlled according to the size of the driving signal. When the driving signal of the second electrode is fixed, the size of the driving signal of the first electrode can adjust the degree of color change of the electrochromic layer.

[0112] S903: and, according to the anti-peeping closing instruction, stop transmitting the driving signal to the first electrode corresponding to the anti-peeping closing instruction;

[0113] S904: Based on the disappearance of the driving signal, the color of the corresponding electrochromic layer becomes lighter.

[0114] The color of the electrochromic layer changes from dark to light because the driving signal is no longer transmitted to the first electrode, the driving signal disappears, the driving force for the color change of the electrochromic layer disappears, and the color is restored.

[0115] In some embodiments, when the first electrode includes at least two groups of sub-electrodes, the method further includes:

[0116] According to the anti-peeping adjustment instruction, a driving signal is transmitted to the target sub-electrode, or the transmission of the driving signal to the target sub-electrode is stopped, or the size of the driving signal of the target sub-electrode is adjusted, wherein the target sub-electrode is at least one group of sub-electrodes of the first electrode.

[0117] Exemplarily, the first group of sub-electrodes 401, the second group of sub-electrodes 402, and the third group of sub-electrodes 403 can control which specific group of sub-electrodes to transmit the driving signal to, and control the size of the driving signal according to different anti-peeping effect requirements. The larger the driving signal, the stronger the electric field, the deeper the color change, and the wider the width. For example, if the first group of sub-electrodes 401 is the target sub-electrode, and the second group of sub-electrodes 402 and the third group of sub-electrodes 403 do not receive the driving signal, the discoloration width of the electrochromic layer is the first width; if the first group of sub-electrodes 401 and the second group of sub-electrodes 402 are both target sub-electrodes in the same instruction, the discoloration width of the electrochromic layer is the second width, and the numerical values ​​and size relationship of the driving signals corresponding to the two groups of sub-electrodes will affect the numerical value of the second width; if the first group of sub-electrodes 401, the second group of sub-electrodes 402, and the third group of sub-electrodes 403 are all target sub-electrodes in the same instruction, the discoloration width of the electrochromic layer is the third width, and the numerical values ​​and size relationship of the driving signals corresponding to the three groups of sub-electrodes will affect the third width. The first width is smaller than the second width, and the second width is smaller than the third width. The color change width of the electrochromic layer corresponding to the second group of sub-electrodes 402 as the target sub-electrodes is the fourth width, which is smaller than the second width; the color change width of the electrochromic layer corresponding to the third group of sub-electrodes 403 as the target sub-electrodes is the fifth width, which is smaller than the third width; the magnitude relationship between the fifth width and the fourth width may depend on the width of the electrode. Therefore, the color change width of the electrochromic layer 420 is controlled by driving different groups of sub-electrodes or a combination of different groups of sub-electrodes.

[0118] According to a third aspect of the embodiments of the present application, a display device is provided. Fig.14 Schematic diagram of a display device provided in an embodiment of the present application. Fig.14 As shown, the display device includes: the display panel 1000 as described in the first aspect.

[0119] It should be noted that the display device may include a smart phone, a tablet computer, a laptop computer, a television or other display, etc., and the embodiments of the present application do not specifically limit this.

[0120] It should be noted that in the above embodiments, the description of each embodiment has its own emphasis, and for parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0121] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

[0122] Although the preferred embodiments of this specification have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of this specification.

[0123] Obviously, those skilled in the art can make various changes and modifications to this specification without departing from the spirit and scope of this specification. Thus, if these modifications and variations of this specification fall within the scope of the claims of this specification and their equivalents, this specification is also intended to include these modifications and variations.

Claims

1. A display panel, characterized in that: include: substrate layer; A plurality of pixel structures are arranged on one side of the substrate layer; An electrochromic integrated layer is arranged on a side of the pixel structure away from the substrate layer; The electrochromic integrated layer comprises a first electrode and an electrochromic layer, the first electrode has a first hollow region, the orthographic projection of the first hollow region on the substrate layer covers the orthographic projection of the pixel structure on the substrate layer, and the orthographic projection of the first electrode on the substrate layer covers the orthographic projection of the pixel defining structure on the substrate layer; The first electrode is used to control the color of the electrochromic layer in the corresponding area to become darker under the drive of a driving signal.

2. The display panel according to claim 1, characterized in that: The pixel defining structure is disposed between adjacent pixel structures.

3. The display panel according to claim 1, characterized in that: The first electrode includes at least two groups of sub-electrodes, and the sub-electrodes in each group are insulated from each other.

4. The display panel according to claim 3, characterized in that: Different groups of the sub-electrodes are used to receive different driving signals.

5. The display panel according to claim 3, characterized in that: At least two groups of the sub-electrodes surround different pixel structures.

6. The display panel according to claim 3, characterized in that: In the case where the same pixel structure is surrounded by at least two groups of the sub-electrodes, on a cross section cut by a line connecting two adjacent pixel structures, any group of the sub-electrodes is arranged between the other groups of the sub-electrodes.

7. The display panel according to claim 3, characterized in that: The first electrode includes a first group of sub-electrodes, a second group of sub-electrodes and a third group of sub-electrodes; On a cross section cut by a line connecting two adjacent pixel structures, the second group of sub-electrodes includes at least two, the third group of sub-electrodes includes at least two, and the sub-electrodes in the same group are electrically connected to each other; On a cross section cut by a line connecting two adjacent pixel structures, the first group of sub-electrodes is located between at least two of the second group of sub-electrodes, and the second group of sub-electrodes is located between at least two of the third group of sub-electrodes.

8. The display panel according to claim 7, characterized in that: On a cross section cut by a line connecting two adjacent pixel structures, at least two of the second group of sub-electrodes on both sides of the first group of sub-electrodes are symmetrical with respect to the first group of sub-electrodes; and / or, On a cross section cut by a line connecting two adjacent pixel structures, at least two of the third group of sub-electrodes on both sides of the first group of sub-electrodes are symmetrical with respect to the first group of sub-electrodes.

9. The display panel according to claim 7, characterized in that: In the direction of the connection line between two adjacent pixel structures, the size of a single electrode of the second group of sub-electrodes and the size of a single electrode of the third group of sub-electrodes are both smaller than the size of the first group of sub-electrodes.

10. The display panel according to claim 1, characterized in that: Also includes: A plurality of pixel units, each pixel unit comprising a plurality of pixel structures, wherein at least two pixel structures in the same pixel unit are used to emit light of different colors; The orthographic projection of the first electrode on the substrate layer surrounds the orthographic projection of the pixel unit on the substrate layer.

11. The display panel according to claim 2, characterized in that: The electrochromic integrated layer also includes a second electrode, an ion storage layer and an ion conduction layer; The ion conduction layer is disposed between the ion storage layer and the electrochromic layer, and the ion storage layer, the ion conduction layer and the electrochromic layer are all disposed between the first electrode and the second electrode.

12. The display panel according to claim 11, characterized in that: The second electrode has a second hollow area, and the orthographic projection of the second hollow area on the substrate layer covers the orthographic projection of the pixel structure on the substrate layer; An orthographic projection of the second electrode on the substrate layer covers an orthographic projection of the pixel defining structure on the substrate layer.

13. The display panel according to claim 11, characterized in that: The second electrode comprises a transparent conductive material; and / or, The first electrode includes a transparent conductive material.

14. The display panel according to claim 11, characterized in that: Also includes: A first lead, one end of which is electrically connected to the first electrode, and the other end of which is used to be electrically connected to a driving chip; a second lead, one end of which is electrically connected to the second electrode, and the other end of which is used to electrically connect to the driving chip; The first lead and the second lead both surround all the pixel structures.

15. The display panel according to claim 2, characterized in that: Also includes: A color filter film is disposed between the substrate layer and the electrochromic integrated layer, the color filter film comprises a light shielding structure and a color photoresist, the light shielding structure is disposed between adjacent color photoresists, and the orthographic projection of the light shielding structure on the substrate layer falls within the orthographic projection of the pixel defining structure on the substrate layer; and / or, The touch function layer is arranged on a side of the electrochromic integrated layer away from the substrate layer.

16. The display panel according to claim 15, characterized in that: In the direction of a connection line between two adjacent pixel structures, the size of the light shielding structure is smaller than or equal to the size of the first electrode.

17. The display panel according to claim 1, characterized in that: Also includes: The polarizer is arranged on a side of the electrochromic integrated layer away from the substrate layer.

18. The display panel according to claim 1, characterized in that: The pixel structure includes a light emitting device.

19. The display panel according to claim 1, characterized in that: The first electrode is used to control the color of the electrochromic layer in the corresponding area to turn black under the driving of a driving signal.

20. An anti-peeping driving method for a display panel, characterized in that: Applied to the display panel according to any one of claims 1 to 19, the method comprising: According to the anti-peeping opening instruction, transmitting a driving signal to the first electrode corresponding to the anti-peeping opening instruction; Based on the driving signal, controlling the color of the corresponding electrochromic layer to become darker; and, according to an anti-peeping closing instruction, stopping transmitting the driving signal to the first electrode corresponding to the anti-peeping closing instruction; Based on the disappearance of the driving signal, the color of the corresponding electrochromic layer becomes lighter.

21. The anti-peeping driving method of a display panel according to claim 20, characterized in that: In the case where the first electrode includes at least two groups of sub-electrodes, the method further includes: According to the anti-peeping adjustment instruction, a driving signal is transmitted to the target sub-electrode, or the transmission of the driving signal to the target sub-electrode is stopped, or the size of the driving signal of the target sub-electrode is adjusted, wherein the target sub-electrode is at least one group of sub-electrodes of the first electrode.

22. The anti-peeping driving method of a display panel according to claim 20, characterized in that: The step of transmitting a driving signal to a first electrode corresponding to the anti-peeping opening instruction according to the anti-peeping opening instruction comprises: According to the anti-peeping opening instruction, the driving signal is transmitted to the first electrode of the target partition, wherein the first electrode is divided into at least two anti-peeping partitions, and the target partition is any of the anti-peeping partitions.

23. A display device, characterized in that: include: A display panel as claimed in any one of claims 1 to 19.

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