CN115951533A

CN115951533A - Display panel, driving method and display device

Info

Publication number: CN115951533A
Application number: CN202310003296.1A
Authority: CN
Inventors: 李文博; 王明芳
Original assignee: BOE Technology Group Co Ltd
Current assignee: BOE Technology Group Co Ltd
Priority date: 2023-01-03
Filing date: 2023-01-03
Publication date: 2023-04-11

Abstract

The application discloses a display panel, a driving method and a display device, relates to the technical field of display, can realize the switching function of an anti-peeping mode of the display panel, and can switch the anti-peeping mode and a normal display mode according to requirements. A display panel, comprising: a substrate layer; a plurality of pixel structures disposed on one side of the substrate layer; the electrochromic integrated layer is arranged on one side, away from the substrate layer, of the pixel structure; the electrochromic integration layer comprises a first electrode and an electrochromic layer, the first electrode has a first hollowed-out area, an orthographic projection of the first hollowed-out area on the substrate layer covers an orthographic projection of the pixel structure on the substrate layer, 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; the first electrode is used for controlling the color of the electrochromic layer of the corresponding area to be darkened under the driving of a driving signal.

Description

Display panel, driving method and display device

Technical Field

The present disclosure relates to the field of display technologies, and in particular, to a display panel, a driving method and a display device.

Background

Currently, information security and user privacy are increasingly paid more attention by users. But the user also faces the risk of privacy disclosure while enjoying large-screen and wide-view display effects. In order to prevent others from seeing the contents of the screen from the side of the display, a peep-proof film is usually attached to the display, however, the attachment of the peep-proof film can cause the display to be in a peep-proof mode all the time, and the peep-proof mode cannot be closed. Under the condition that the user is in a hidden environment and does not need a peep-proof mode, the convenience of the wide visual angle of the display screen can be lost.

Disclosure of Invention

The embodiment of the application provides a display panel, a driving method and a display device, which can realize the switching function of an anti-peeping mode of the display panel, and can switch the anti-peeping mode and a normal display mode according to requirements.

In a first aspect of embodiments of the present application, a display panel is provided, including:

a substrate layer;

a plurality of pixel structures disposed on one side of the substrate layer;

the electrochromic integrated layer is arranged on one side, away from the substrate layer, of the pixel structure;

the electrochromic integrated layer comprises a first electrode and an electrochromic layer, the first electrode is provided with a first hollow-out area, the orthographic projection of the first hollow-out 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 for controlling the color of the electrochromic layer of the corresponding area to be darkened under the driving of a driving signal.

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.

In some embodiments, the first electrode comprises at least two sets of sub-electrodes, each set of sub-electrodes being insulated from each other.

In some embodiments, different sets of said sub-electrodes are adapted to receive different said drive signals.

In some embodiments, at least two sets of the sub-electrodes surround different ones of the pixel structures.

In some embodiments, in a case that at least two groups of the sub-electrodes surround the same pixel structure, on a cross section cut by a connecting line of two adjacent pixel structures, any group of the sub-electrodes is disposed between the other groups of the sub-electrodes.

In some embodiments, the first electrode comprises a first set of sub-electrodes, a second set of sub-electrodes, and a third set of sub-electrodes;

on a cross section cut by a connecting line of two adjacent pixel structures, the second group of sub-electrodes comprises at least two, the third group of sub-electrodes comprises at least two, and the sub-electrodes in the same group are electrically connected with each other;

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

In some embodiments, on a cross section cut by a connecting line of 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 the presence of a gas in the gas,

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

In some embodiments, in a direction in which the connection lines of two adjacent pixel structures are located, the size of each of the individual electrodes of the second group of sub-electrodes and the size of each of the individual electrodes of the third group of sub-electrodes are smaller than the size of each of the individual electrodes of the first group of sub-electrodes.

In some embodiments, the display panel further includes:

the pixel units comprise a plurality of pixel structures, and at least two pixel structures in the same pixel unit are used for emitting light rays with different colors;

an orthographic projection of the first electrode on the substrate layer surrounds an orthographic projection of the pixel cell on the substrate layer.

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

the ion conducting layer is disposed between the ion storage layer and the electrochromic layer, and the ion storage layer, the ion conducting layer and the electrochromic layer are disposed between the first electrode and the second electrode.

In some embodiments, the second electrode has a second hollowed-out area, an orthographic projection of the second hollowed-out area on the substrate layer covers an 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.

In some embodiments, the second electrode comprises a transparent conductive material; and/or the presence of a gas in the atmosphere,

the first electrode includes a transparent conductive material.

In some embodiments, the display panel further includes:

one end of the first lead is electrically connected with the first electrode, and the other end of the first lead is electrically connected with a driving chip;

one end of the second lead is electrically connected with the second electrode, and the other end of the second lead is electrically connected with the driving chip;

the first lead and the second lead both surround all the pixel structures.

In some embodiments, the display panel further includes:

the color filter film is arranged between the substrate layer and the electrochromic integrated layer and comprises a light shielding structure and color light progenitors, the light shielding structure is arranged between the adjacent color light progenitors, and the orthographic projection of the light shielding structure on the substrate layer is in the orthographic projection of the pixel definition structure on the substrate layer;

and/or the presence of a gas in the gas,

and the touch control functional layer is arranged on one side of the electrochromic integrated layer, which is far away from the substrate layer.

In some embodiments, in a 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.

In some embodiments, the display panel further includes:

and the polaroid is arranged on one side of the electrochromic integrated layer, which is far away from the substrate layer.

In some embodiments, the pixel structure comprises a light emitting device.

In some embodiments, the first electrode is used for controlling the color of the electrochromic layer of the corresponding region to be black under the driving of a driving signal.

In a second aspect of the embodiments of the present application, there is provided a method for driving a display panel to prevent peeping, the method being applied to the display panel according to the first aspect, the method including:

transmitting a driving signal to a first electrode corresponding to the peep-proof opening instruction according to the peep-proof opening instruction;

controlling the color deepening of the corresponding electrochromic layer based on the driving signal;

and according to the peep-proof closing instruction, stopping transmitting the driving signal to the first electrode corresponding to the peep-proof closing instruction;

based on the disappearance of the driving signal, the color of the corresponding electrochromic layer is lightened.

In some embodiments, where the first electrode includes at least two sets of sub-electrodes, the method further comprises:

and transmitting a driving signal to a target sub-electrode according to the peeping-proof adjusting instruction, or stopping transmitting the driving signal to the target sub-electrode, or adjusting the magnitude of the driving signal of the target sub-electrode, wherein the target sub-electrode is at least one group of sub-electrodes of the first electrode.

In some embodiments, the transmitting a driving signal to a first electrode corresponding to an anti-peeping opening instruction according to the anti-peeping opening instruction includes:

and transmitting the driving signal to the first electrode of a target partition according to the peep-proof starting instruction, wherein the first electrode is divided into at least two peep-proof partitions, and the target partition is any peep-proof partition.

In a third aspect of the embodiments of the present application, there is provided a display device including:

the display panel according to the first aspect.

According to the display panel provided by the embodiment of the application, the electrochromic integrated layer is arranged on one side, away from the substrate layer, of the pixel structure, and the first electrode of the electrochromic integrated layer is used for controlling the color of the electrochromic layer in the corresponding area to be darkened under the driving of the driving signal. In thick orientation, the first electrode and the at least space of pixel definition structure have the overlap, then the first electrode can control the colour of the electrochromic layer that corresponds the region under drive signal's effect and change, the dark electrochromic layer of colour can absorb light, play the effect of sheltering from light, then the light of pixel structure slope outgoing is absorbed by the electrochromic layer of dark colour easily, the luminance of the emergent light of the slope visual angle of display panel reduces by a wide margin promptly, it shows the picture to be difficult to see in display panel's big visual angle direction, can play the effect of peeping prevention. Under the condition that 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 transmission performance when the color of the electrochromic layer does not change, so that the normal display of the display panel is not influenced. The state of the first electrode to which the driving signal is applied can be used as a switch in the peep prevention mode, and switching of the peep prevention mode of the display panel can be achieved.

Drawings

Fig. 1 is a schematic partial structure diagram of a display panel according to an embodiment of the present disclosure;

fig. 2 is a schematic structural view of an anti-peeping film provided in an embodiment of the present application;

fig. 3 is a schematic structural view of a first electrode provided in an embodiment of the present application;

fig. 4 is a schematic partial structure diagram of another display panel provided in an embodiment of the present application;

fig. 5 is a schematic partial structure diagram of another display panel provided in an embodiment of the present application;

fig. 6 is a schematic partial structure diagram of another display panel provided in an embodiment of the present application;

fig. 7 is a schematic partial structure diagram of a display panel according to an embodiment of the present application;

fig. 8 is a schematic structural diagram of a pixel unit of a display panel according to an embodiment of the present disclosure;

fig. 9 is a schematic view illustrating a positional relationship between a pixel unit and a first electrode of a display panel according to an embodiment of the present disclosure;

fig. 10 is a schematic diagram illustrating a positional relationship between a pixel unit and a first electrode of a display panel according to an embodiment of the present disclosure;

fig. 11 is a schematic cross-sectional view of a display panel along M-N according to an embodiment of the present disclosure;

fig. 12 is a schematic structural diagram of a display panel provided in an embodiment of the present application;

fig. 13 is a schematic flowchart of a peep-proof driving method for a display panel according to an embodiment of the present application;

fig. 14 is a schematic structural diagram of a display device according to an embodiment of the present application.

Detailed Description

In order to better understand the technical solutions provided by the embodiments of the present specification, the technical solutions of the embodiments of the present specification are described in detail below with reference to the drawings and specific embodiments, and it should be understood that the specific features in the embodiments and examples of the present specification are detailed descriptions of the technical solutions of the embodiments of the present specification, and are not limitations on the technical solutions of the embodiments of the present specification, and the technical features in the embodiments and examples of the present specification may be combined with each other without conflict.

In this document, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element. The term "two or more" includes the case of two or more.

At present, information security and user privacy are increasingly emphasized by users. But the user also faces the risk of privacy disclosure while enjoying large-screen and wide-view display effects. In order to prevent others from seeing the contents of the screen from the side of the display, a peep-proof film is usually attached to the display, however, the attachment of the peep-proof film can cause the display to be in a peep-proof mode all the time, and the peep-proof mode cannot be closed. Under the condition that the user is in a hidden environment and does not need a peep-proof mode, the convenience of the wide visual angle of the display screen can be lost.

In view of this, embodiments of the present application provide a display panel, a driving method, and a display device, which can implement a switching function of an anti-peeping mode of the display panel, and can switch the anti-peeping mode and a normal display mode as required.

In a first aspect of an embodiment of the present application, a display panel is provided, and fig. 1 is a schematic partial structure diagram of the display panel provided in the embodiment of the present application. As shown in fig. 1, a display panel provided in an embodiment of the present application includes: the electrochromic display device comprises a substrate layer 100, a plurality of pixel structures 200, pixel definition structures 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 the pixel definition structures 300 are arranged between the adjacent pixel structures 200. For example, the plurality of pixel structures 200 may be arranged in an array, the pixel structures 200 may include light emitting devices, and the display panel is an active light emitting type display panel, and the light emitting devices may be light emitting diodes. The pixel structure 200 may further include a pixel electrode, the pixel electrode is used for controlling the rotation of the liquid crystal under the driving of the driving signal to realize the image 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 disposed 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, an orthographic projection of the first hollow area 411 on the substrate layer 100 covers an orthographic projection of the pixel structure 200 on the substrate layer 100, and the covering may be a complete covering or a partial covering, 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. The pixel defining structure 300 is located in an area where no light is emitted, and the pixel structure 200 is used for emitting light. Illustratively, the pixel structure 200 may include a red pixel structure R, a green pixel structure G, and a blue pixel structure B, and a color picture may be displayed based on a color mixing principle of three primary colors of red, green, and blue. The first electrode 410 is used to control the color of the electrochromic layer 420 corresponding to the region to be darker under the driving of the driving signal, as shown in fig. 1, the color of the region of the electrochromic layer 420 corresponding to the first electrode 410 is darker than the color of other regions, which may be black for example. In the film thickness direction, the first electrode 410 and the pixel defining structure 300 are overlapped at least in space, so that 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 electrochromic layer 420 with the deepened color can absorb light, and the effect of blocking light is achieved, and then the light obliquely emitted by the pixel structure 200 is easily absorbed by the electrochromic layer 420 with the deepened color, namely, the brightness of the emitted light at the oblique viewing angle of the display panel is greatly reduced, a display picture is difficult to see in the large viewing angle direction of the display panel, and the anti-peeping effect can be achieved. Under the condition that the first electrode 410 does not receive the driving signal, the color of the electrochromic layer 420 does not change, and the electrochromic layer 420 has better light transmittance performance when the color does not change, and does not affect the normal display of the display panel. Under the condition that the first electrode 410 receives the driving signal, the color of the electrochromic layer 420 corresponding to the hollow area 411 of the first electrode 410 does not change, and light emission at the front viewing angle of the display panel is not affected, so that a user can see a display image at the front viewing angle. The driving signal applied to the first electrode 410 is to turn on the anti-peeping mode, the driving signal is not applied to the first electrode 410, and the off state of the anti-peeping mode can be maintained, so that the state of the first electrode 410 to which the driving signal is applied can be used as a switch of the anti-peeping mode, and the switching 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, the color of the electrochromic layer 420 around the pixel structure 200 can be controlled to be dark under the control of the driving signal, light around the pixel structure 200 can be absorbed and shielded, and thus, the peep prevention of a large viewing angle in all directions from top to bottom and from left to right can be realized.

For example, the critical point of the electrochromic layer 420 becoming darker may be a light transmittance of less than 10%, and the critical point of the electrochromic layer 420 becoming lighter from a dark color may be a light transmittance of more than 80%.

It should be noted that, the electrochromic integration layer 400 is disposed on a side of the pixel structure 200 away from the substrate layer 100, and it can be understood that the electrochromic integration layer 400 is disposed on a light-emitting side of the pixel structure 200, which is beneficial to implementing the peeping prevention function.

It should be noted that, the columnar electrochromic structures may be disposed on two sides of the light emitting device to perform the peeping prevention function at the left and right large viewing angles, but the peeping prevention effect at the upper and lower large viewing angles is poor. Covering the peep-proof membrane on display panel's surface and also can playing omnidirectional peep-proof, but traditional peep-proof membrane is a vertical latticed black pad pasting, can block the light at large visual angle, realizes the purpose of peep-proof, but this membrane does not have the switch, when the user obtains privacy protection, has lost the convenience at wide visual angle. Meanwhile, the peep-proof film can only achieve peep-proof at left and right visual angles, and the peep-proof capability at a large visual angle in the vertical direction is poor. In addition, the columnar electrochromic structure process is difficult to realize a high-resolution display panel, the process is complex, the process difficulty is high, the process is difficult to be compatible with stacking of other film layers, the realizability on a display module screen is low, the production cost is high, and the mass production performance is poor.

Exemplarily, fig. 2 is a schematic structural diagram of an anti-peeping film provided in an embodiment of the present application. As shown in fig. 2, the peep preventing film F0 has a structure extending vertically, that is, the peep preventing effect is mainly applied to the left and right, but in a large-sized display or a place with dense persons, the peep preventing in the vertical direction is also very important. Fig. 3 is a schematic structural diagram of a first electrode provided in an embodiment of the present application. As shown in fig. 3, the first electrode 410 is mesh-shaped, and fig. 3 illustrates a quadrilateral mesh, and the mesh shape of the first electrode 410 may be specifically set according to the shape of the pixel structure. The first electrode 410 in a grid shape can realize peeping prevention at various angles such as up, down, left, right, left, down, right, up, right, and the like.

According to the display panel provided by the embodiment of the application, the electrochromic integrated layer 400 is arranged on one side of the pixel structure 200, which is far away from the substrate layer 100, and the first electrode 410 of the electrochromic integrated layer 400 is used for controlling the color of the electrochromic layer 420 in the corresponding area to be darkened under the driving of the driving signal. In the film thickness direction, the first electrode 410 and the pixel defining structure 300 are overlapped at least in space, so that 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 electrochromic layer 420 with the deepened color can absorb light, and the effect of blocking light is achieved, and then the light obliquely emitted by the pixel structure 200 is easily absorbed by the electrochromic layer 420 with the deepened color, namely, the brightness of the emitted light at the oblique viewing angle of the display panel is greatly reduced, a display picture is difficult to see in the large viewing angle direction of the display panel, and the anti-peeping effect can be achieved. Under the condition that the first electrode 410 does not receive the driving signal, the color of the electrochromic layer 420 does not change, and the electrochromic layer 420 has a good light transmittance performance when the color does not change, and does not affect the normal display of the display panel. The state of the first electrode 410 to which the driving signal is applied may be a switch in the peep prevention mode, and switching of the peep prevention mode of the display panel may be achieved.

In some embodiments, fig. 4 is a schematic partial structure diagram of another display panel provided in this application example. As shown in fig. 4, the electrochromic-integrated layer 400 further includes a second electrode 430, an ion storage layer 440, and an ion conducting layer 450, the ion conducting layer 450 being disposed between the ion storage layer 440 and the electrochromic layer 420, and the ion storage layer 440, the ion conducting layer 450, and the electrochromic layer 420 being disposed between the first electrode 410 and the second electrode 430.

For example, different driving voltages may be applied to the first electrode 410 and the second electrode 430, a voltage difference may form an electric field between the first electrode 410 and the second electrode 430, ions collected by the ion storage layer 440 are extracted by the electric field and conducted to the electrochromic layer 420 through the ion conducting layer 450, and the electrochromic layer 420 in a corresponding region of the first electrode 410 may change from transparent to black. When a reverse voltage difference is applied, ions are extracted from electrochromic layer 420, through ion conducting layer 450, and back to ion storage layer 440, at which time 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 the light shielding effect, as shown by the arrow in fig. 4, which indicates the light path of the outgoing light of the pixel structure 200, and the outgoing light at the side view angle is shielded and absorbed by the darkened electrochromic layer 420. Under the driving of the first electrode 410 and the second electrode 430, the electrochromic layer 420 turns black, so that more light can be absorbed, and the peep-proof effect is better.

Illustratively, the second electrode 430 includes a transparent conductive material, and the first electrode 410 includes a transparent conductive material, and the transparent electrode material may be indium tin oxide, which is not particularly limited in the embodiments of the present application. The emergent light of the pixel structure 200 can be emitted out of the display panel without being affected, and when the electrochromic layer 420 is in the off state, i.e., in the transparent state, the large viewing angle display of the display panel is not affected. The two electrodes 430 can also adopt PEDOT (3,4-ethylene dioxythiophene monomer polymer), which is convenient for coating in large-area production, does not need high-temperature process, and can protect organic luminescent materials.

The display panel provided by the embodiment of the present application uses the first electrode 410 in a grid shape 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 emitted normally.

In some embodiments, fig. 5 is a schematic partial structure diagram of another display panel provided in the embodiments of the present application. As shown in fig. 5, the second electrode 430 has a second hollow area 431, and an orthographic projection of the second hollow area 431 on the substrate layer 100 covers an 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 covering may be partial covering or complete covering, and the embodiments of the present application are not particularly limited. The second electrode 430 is formed in a grid shape to better drive the color change of the electrochromic layer 420 on the pixel defining structure 300, and the boundary of the color change region is clearer. The second hollow-out region 431 may be provided with a transparent optical film layer, and the embodiment of the present application is not particularly limited.

In some embodiments, fig. 6 is a schematic partial structure diagram of another display panel provided in an example of the present application. As shown in fig. 6, the display panel provided in the embodiment of the present application further includes: the color filter 500, the color filter 500 is disposed between the substrate layer 100 and the electrochromic integrated layer 400, the color filter 500 includes a light shielding structure 510 and a color light precursor, and the color light resistor may be disposed with a red light resistor r, a green light resistor g, and a blue light resistor b corresponding to the color of the light emitted from the pixel structure 200. The light shielding structures 510 are arranged between adjacent color resists, and an orthographic projection of the light shielding structures 510 on the substrate layer 100 falls within an 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 may be smaller than or equal to the width of the first electrode 410, that is, the size of the light shielding structure 510 is smaller than or equal to the size of the first electrode 410 in the direction of the connecting line of two adjacent pixel structures 200. Since the light shielding structure 510 is closer to the pixel structure 200 than the first electrode 410, the light shielding structure 510 does not need to be too wide, and the function of the color filter 500 can be achieved, and if the light shielding structure 510 is too wide, the light output amount at the front viewing angle of the pixel structure 200 is affected, and the display effect at the front viewing angle is affected.

In some embodiments, fig. 7 is a schematic partial structure diagram of a display panel provided in an embodiment of the present application. As shown in fig. 7, the display panel provided in the embodiment of the present application further includes a touch functional layer 600 and a polarizer 700, where the touch functional layer 600 is disposed on a side of the electrochromic integrated layer 400 away from the substrate layer 100, and the polarizer 700 is disposed on a side of the electrochromic integrated layer 400 away from the substrate layer 100. As shown in fig. 7, the touch function layer 600 is disposed between the electrochromic integrated layer 400 and the polarizer 700, which is only schematic. The polarizer may also be disposed between the touch functional layer and the electrochromic integrated layer, and the embodiment of the present application is not particularly limited. For example, the polarizer 700 may replace a color filter for filtering light and reducing reflection. The touch function layer 600 may be provided with a touch electrode for realizing touch control.

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 for emitting light rays with different colors. Fig. 8 is a schematic structural diagram of a pixel unit of a display panel according to an embodiment of the present disclosure. As shown in fig. 8, the pixel unit 201 includes a red pixel structure R, a green pixel structure G, and a blue pixel structure B, and based on the color mixing principle of three primary colors of red, green, and blue, one pixel unit 201 may include two green pixel structures G, so that a desired color coordinate adjustment range may be realized. The orthographic projection of the first electrode 410 on the substrate layer 100 surrounds the orthographic projection of the pixel structures on the substrate layer 100, each pixel structure being surrounded by the first electrode 410.

In some embodiments, the orthographic projection of the first electrode 410 on the substrate layer 100 surrounds the orthographic projection of the pixel cell on the substrate layer 100. The peep-proof angle of the first electrode 410 surrounding a single pixel structure 200 is different from the peep-proof angle of the first electrode 410 surrounding a single pixel unit, and the size of the first electrode grid can be set according to the specific peep-proof angle degree requirement.

For example, fig. 9 is a schematic diagram of a positional relationship between a pixel unit and a first electrode of a display panel according to an embodiment of the present disclosure. As shown in fig. 9, the first electrode 410 surrounds a single pixel unit 201.

In some embodiments, the first electrode comprises at least two sets of sub-electrodes, each set of sub-electrodes being insulated from each other. Different groups of sub-electrodes are used for receiving different driving signals, and the mutually insulated sub-electrodes can be driven separately and can be used for adjusting the peeping-proof angle. Illustratively, different driving signals can generate electric fields with different intensities, and the electrochromic layer 420 can be controlled to generate different degrees of color changes, thereby affecting the peeping prevention angle.

In some embodiments, at least two sets of sub-electrodes surround different pixel structures. Illustratively, 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 may surround the red pixel structure R, the second group of sub-electrodes surrounds the green pixel structure G, and the third group of sub-electrodes surrounds the blue pixel structure B, and through individual control over different groups of sub-electrodes, anti-peeping control over different sub-pixels may be implemented, and anti-peeping control may be performed individually for a certain monochrome picture or monochrome chromaticity, so that an anti-peeping side effect and degree may be controlled more flexibly.

In some embodiments, in the case that at least two groups of sub-electrodes surround the same pixel structure, on a cross section cut by a connecting line of two adjacent pixel structures, any one group of sub-electrodes is disposed between the other group of sub-electrodes. Different groups of sub-electrodes can surround the same pixel structure, and then the driving signals of the different groups of sub-electrodes are controlled, so that the color change width of the electrochromic layer can be controlled, and further, the flexible adjustment of different peep-proof angles is realized. At least one group of sub-electrodes comprises at least two, and any group of sub-electrodes is arranged between the two sub-electrodes, so that the width of the anti-peeping color-changing area can be controlled.

For example, fig. 10 is a schematic diagram illustrating a positional relationship between a pixel unit and a first electrode of a display panel according to an embodiment of the present disclosure; fig. 11 is a schematic cross-sectional view of a display panel along M-N according to an embodiment of the present disclosure. Referring to fig. 10 and 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. As shown in fig. 11, on a cross section M-N cut by a connecting line of two adjacent pixel structures, two sub-electrodes 402 of the second group and two sub-electrodes 403 of the third group are included, and the sub-electrodes of the same group are electrically connected to each other, that is, the two sub-electrodes 402 of the second group can receive the same driving signal, that is, they are connected in series, and similarly, the two sub-electrodes 403 of the third group are connected in series. In a cross section cut by a connecting line of two adjacent pixel structures, the first group of sub-electrodes 401 is located between two second group of sub-electrodes 402, and the second group of sub-electrodes 402 is located between two third group of sub-electrodes 403. Illustratively, as shown in fig. 11, in a cross section cut by a connecting line of two adjacent pixel structures, two second group sub-electrodes 402 on two sides of the first group sub-electrode 401 are symmetrical with respect to the first group sub-electrode 401, and two third group sub-electrodes 403 on two sides of the first group sub-electrode 401 are symmetrical with respect to the first group sub-electrode 401.

For example, the first group of sub-electrodes 401, the second group of sub-electrodes 402, and the third group of sub-electrodes 403 may control to which specific group of sub-electrodes a driving signal is transmitted and control the magnitude of the driving signal according to different requirements for anti-peeping effect, where the driving signal is large, the stronger the electric field is, the deeper the color change is, and the wider the width is. 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 changing width of the electrochromic layer is the first width; meanwhile, driving signals are transmitted to the first group of sub-electrodes 401 and the second group of sub-electrodes 402, the color change width of the electrochromic layer is a second width, and the numerical value and the magnitude relation of the driving signals corresponding to the two groups of sub-electrodes affect the numerical value of the second width; meanwhile, driving signals are transmitted to the first group of sub-electrodes 401, the second group of sub-electrodes 402 and the third group of sub-electrodes 403, the color changing width of the electrochromic layer is a third width, and the third width is affected by the numerical value and the size relationship of the driving signals corresponding to the three groups of sub-electrodes. The first width is less than the second width, which is less than the third width. The color changing width of the electrochromic layer corresponding to the second group of sub-electrodes 402 is independently driven to be a fourth width, and the fourth width is smaller than the second width; the color changing width of the electrochromic layer corresponding to the third group of sub-electrodes 403 is driven to be a fifth width, and the fifth width is smaller than the third width; the magnitude relationship of the fifth width to the fourth width may depend on the width of the electrode. Accordingly, the color-changing width of the electrochromic layer 420 is controlled by driving different groups of sub-electrodes or a combination of different groups of sub-electrodes.

It should be noted that the overlapping regions between the sub-electrodes of different groups may be isolated by insulating layers, and the sub-electrodes of different groups may be prepared by different processes.

Illustratively, as shown in fig. 11, in the direction in which the connection lines of two adjacent pixel structures are located, 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 may be used as main driving electrodes, and the second group of sub-electrodes 402 and the third group of sub-electrodes 403 may be used as auxiliary driving electrodes for flexibly adjusting the color-changing width to realize adjustment of different peeping prevention widths.

For example, referring to 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 4 pixel structures surrounding the same pixel unit, that is, 4 grids of GGRB, corresponding to the same pixel structure, for example, R, the area of the hollow area corresponding to the first group of sub-electrodes 401 is larger than the area of the hollow area corresponding to the second group of sub-electrodes 402, and is larger than the area of the hollow 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 different in hollow area and used for flexibly adjusting the color change width so as to realize adjustment of different peeping prevention widths.

For example, referring to fig. 10 and 11, the first group of sub-electrodes 401, the second group of sub-electrodes 402, and the third group of sub-electrodes respectively form 4 pixel structures surrounding the same pixel unit, that is, 4 grids of GGRB, and in the same pixel unit, the area of the hollow area of the first group of sub-electrodes 401 corresponding to the blue pixel structure B is larger than the area of the hollow area of the first group of sub-electrodes 401 corresponding to the red pixel structure R, and is larger than the area of the hollow area of the first group of sub-electrodes 401 corresponding to the green pixel structure G. Similarly, the area of the hollow-out region of the second group of sub-electrodes 402 corresponding to the blue pixel structure B is larger than the area of the hollow-out region of the second group of sub-electrodes 402 corresponding to the red pixel structure R, and is larger than the area of the hollow-out region of the second group of sub-electrodes 402 corresponding to the green pixel structure G. The area of the hollow-out region of the third group of sub-electrodes 403 corresponding to the blue pixel structure B is larger than the area of the hollow-out region of the third group of sub-electrodes 403 corresponding to the red pixel structure R, and is larger than the area of the hollow-out region of the third group of sub-electrodes 403 corresponding to the green pixel structure G.

Illustratively, referring to fig. 10 and 11, the first group of sub-electrodes 401, the second group of sub-electrodes 402, and the third group of sub-electrodes are located at 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.

Illustratively, the distance between the pixel structures is 19-23 μm, if pixel-level peep prevention is required, when ITO is used as the first electrode, the line width of the first electrode can be 5-15 um according to the view angle required by peep prevention, and the width of a single sub-electrode can be 5-15 um under the condition of multiple groups of sub-electrodes. The density between different groups of sub-electrodes can be selected according to the process capability, and large-pixel-level peep prevention or sub-pixel-level peep prevention is achieved. The large-pixel-level peep prevention is generally realized and the peep prevention performance can be met.

For example, the arrangement of the plurality of sets of sub-electrodes can be regarded as a grid of the plurality of first electrodes. The overlapped parts among grids of different groups of sub-electrodes are separated by insulators made of insulating materials such as SiO2 and SiNOx. The multiple nets can be respectively controlled by leading out the nets by leads. The line spacing of the grid is at the minimum process capability limit, typically 2-3um, and the ito linewidth can be 5-8um. The insulating material may be disposed in a whole layer, or may be disposed in a local area, for example, the insulating layer is disposed only in the overlapping area of the first electrode to isolate signals of different groups of sub-electrodes, and the insulating layer may also be extended to an area where different groups of sub-electrodes do not overlap, which is not limited in this application.

In some embodiments, the display panel further comprises: one end of the first lead is electrically connected with the first electrode, and the other end of the first lead is electrically connected with the driving chip; one end of the second lead is electrically connected with the second electrode, and the other end of the second lead is electrically connected with the driving chip; the first lead and the second lead both surround all the pixel structures. That is, the first and second wires surround the display region, and the longer the wire length, the lower the resistance, and the interference of the driving signal can be reduced, and the signal uniformity can be improved.

Exemplarily, fig. 12 is a schematic structural diagram of a display panel provided in an embodiment of the present application. As shown in fig. 12, a first lead 460 is led out from the grid of the first electrode 410 and is connected to the anti-peeping driving chip IC2 through a first connecting line 480, and a second lead 470 is led out from the second electrode and is connected to the anti-peeping driving chip IC2 through a second connecting line 490. The display panel may further include a display driver chip IC1, the display driver chip IC1 may be bound to the display panel, the display panel may further include a flexible circuit board FPC, and the peep-proof driver chip IC2 may be bound to the flexible circuit board FPC, which is also exemplary and not a specific limitation of the application.

It should be noted that fig. 12 only schematically shows the first lead lines 460 and the second lead lines 470, in the case of the grid arrangement of the first electrodes 410, the number of the first lead lines 460 may be set according to different driving signals and driving partitions of the first electrodes 410, and each first lead line 460 may be used for independently transmitting a driving signal; the first electrodes 410 may also be partitioned according to different pixels, for example, red, green and blue pixels are grouped according to colors, the first electrodes 410 corresponding to all red pixel structures R are led out through the same first lead 460, and so on, and the independent driving of the first electrodes 410 corresponding to the red, green and blue pixel structures may be realized through 3 first leads 460.

For example, the first lead 460, the second lead 470, the first connection line 480, and the second connection line 490 may use a metal stack of Ti-AL-Ti. The first lead 460 and the second lead 470 are wound up, down, left and right, so that the voltage drop is reduced to the greatest extent, and the signal uniformity is improved.

In a second aspect of the embodiment of the present application, a peep-proof driving method for a display panel is provided, and is applied to the display panel described in the first aspect, and fig. 13 is a schematic flow chart of the peep-proof driving method for the display panel provided in the embodiment of the present application. As shown in fig. 13, the method includes:

s901: and transmitting a driving signal to the first electrode corresponding to the peep-proof opening instruction according to the peep-proof opening instruction.

Step S901 may include:

and transmitting a driving signal to a first electrode of a target partition according to the peep-proof starting instruction, wherein the first electrode is divided into at least two peep-proof partitions, and the target partition is any peep-proof partition.

For example, the anti-peeping function can be started for the key information display position of the display screen, for example, the middle area of the display screen is usually used as the key information display area, the edge area of the display screen usually does not display the key information, the middle area of the display screen can be divided into at least one anti-peeping partition, the edge area is divided into at least one anti-peeping partition, and the position information of the anti-peeping partition can be added into the instruction sequence of the anti-peeping starting instruction, so as to realize partition control of the anti-peeping function.

S902: controlling the color deepening of the corresponding electrochromic layer based on the driving signal.

It should be noted that the degree of color deepening mainly reflects the degree of light transmittance, and further affects the anti-peeping effect. The degree of darkening can be controlled by the magnitude of the drive signal. Under the condition that the driving signal of the second electrode is fixed and unchanged, the magnitude of the driving signal of the first electrode can adjust the color change degree of the electrochromic layer.

S903: and stopping transmitting the driving signal to the first electrode corresponding to the peep-proof closing instruction according to the peep-proof closing instruction;

s904: based on the disappearance of the driving signal, the color of the corresponding electrochromic layer becomes lighter.

The color of the electrochromic layer changes from dark to light, and the driving signal disappears on the basis that the driving signal is not continuously transmitted to the first electrode, the color change driving force of the electrochromic layer disappears, and the color is recovered.

In some embodiments, where the first electrode comprises at least two sets of sub-electrodes, the method further comprises:

and transmitting a driving signal to the target sub-electrode according to the peeping-proof adjusting instruction, or stopping transmitting the driving signal to the target sub-electrode, or adjusting the magnitude of the driving signal of the target sub-electrode, wherein the target sub-electrode is at least one group of sub-electrodes of the first electrode.

For example, the first group of sub-electrodes 401, the second group of sub-electrodes 402, and the third group of sub-electrodes 403 may control which group of sub-electrodes to transmit the driving signal to, and control the magnitude of the driving signal according to different anti-peeping requirements, where the driving signal is large, the stronger the electric field is, the deeper the color change is, and the wider the width is. For example, if the first group of sub-electrodes 401 is the target sub-electrodes, the second group of sub-electrodes 402 and the third group of sub-electrodes 403 do not receive the driving signal, the color-changing width of the electrochromic layer is the first width; under the condition that 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 color-changing width of the electrochromic layer is a second width, and the numerical value and the magnitude relation of the driving signals corresponding to the two groups of sub-electrodes affect the numerical value of the second width; in the case that 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 color-changing width of the electrochromic layer is a third width, and the third width is affected by the magnitude and the magnitude relation of the driving signals corresponding to the three groups of sub-electrodes. The first width is less than the second width, which is less 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 a fourth width, and the fourth width 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 a fifth width, and the fifth width is smaller than the third width; the magnitude relationship of the fifth width to the fourth width may depend on the width of the electrode. Accordingly, the color-changing width of the electrochromic layer 420 is controlled by driving different groups of sub-electrodes or combination driving of different groups of sub-electrodes.

In a third aspect of the embodiments of the present application, a display device is provided, and fig. 14 is a schematic structural diagram of the display device provided in the embodiments of the present application. As shown in fig. 14, the display device includes: the display panel 1000 according to the first aspect.

It should be noted that the display device may include a smart phone, a tablet computer, a notebook computer, a television, or other displays, and the embodiments of the present application are not limited in particular.

It should be noted that, in the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to relevant descriptions of other embodiments for parts that are not described in detail in a certain embodiment.

The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.

While preferred embodiments of the present specification have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including the preferred embodiment and all changes and modifications that fall within the scope of the specification.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present specification without departing from the spirit and scope of the specification. Thus, if such modifications and variations of the present specification fall within the scope of the claims of the present specification and their equivalents, then such modifications and variations are also intended to be included in the present specification.

Claims

1. A display panel, comprising:

a substrate layer;

the pixel structures are arranged on one side of the substrate layer;

2. The display panel according to claim 1,

a pixel defining structure is arranged between the adjacent pixel structures, 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.

3. The display panel according to claim 1,

the first electrode comprises at least two groups of sub-electrodes, and the sub-electrodes in each group are mutually insulated.

4. The display panel according to claim 3,

different sets of said sub-electrodes are arranged to receive different said drive signals.

5. The display panel according to claim 3,

at least two groups of the sub-electrodes surround different pixel structures.

6. The display panel according to claim 3,

under the condition that at least two groups of sub-electrodes surround the same pixel structure, any group of sub-electrodes is arranged between other groups of sub-electrodes on a section cut by a connecting line of two adjacent pixel structures.

7. The display panel according to claim 3,

the first electrode comprises a first group of sub-electrodes, a second group of sub-electrodes and a third group of sub-electrodes;

8. The display panel according to claim 7,

on a cross section cut by a connecting line of two adjacent pixel structures, at least two second group sub-electrodes on two sides of the first group sub-electrode are symmetrical relative to the first group sub-electrode; and/or the presence of a gas in the gas,

9. The display panel according to claim 7,

in the direction of the connecting line of two adjacent pixel structures, the size of each single electrode of the second group of sub-electrodes and the size of each single electrode of the third group of sub-electrodes are smaller than the size of each single electrode of the first group of sub-electrodes.

10. The display panel according to claim 1, further comprising:

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,

the electrochromic integration layer further comprises a second electrode, an ion storage layer, and an ion conducting layer;

12. The display panel according to claim 11,

the second electrode is provided with a second hollow-out area, and the orthographic projection of the second hollow-out area on the substrate layer covers the orthographic projection of the pixel structure on the substrate layer;

13. The display panel according to claim 11,

the second electrode comprises a transparent conductive material; and/or the presence of a gas in the gas,

the first electrode includes a transparent conductive material.

14. The display panel according to claim 11, further comprising:

the first lead and the second lead both surround all the pixel structures.

15. The display panel according to claim 2, further comprising:

the color filter film is arranged between the substrate layer and the electrochromic integrated layer and comprises a light shielding structure and color light progenitors, the light shielding structure is arranged between the adjacent color light progenitors, and the orthographic projection of the light shielding structure on the substrate layer falls into the orthographic projection of the pixel definition structure on the substrate layer;

and/or the presence of a gas in the atmosphere,

16. The display panel according to claim 15,

in the direction of the connecting line of two adjacent pixel structures, the size of the light shielding structure is smaller than or equal to that of the first electrode.

17. The display panel according to claim 1, further comprising:

18. The display panel according to claim 1,

the pixel structure includes a light emitting device.

19. The display panel according to claim 1,

the first electrode is used for controlling the color of the electrochromic layer of the corresponding area to be blackened under the driving of the driving signal.

20. A peep-proof driving method for a display panel, applied to the display panel according to any one of claims 1 to 19, the method comprising:

21. The peep-prevention driving method for a display panel according to claim 20, wherein in the case where the first electrode includes at least two sets of sub-electrodes, the method further comprises:

22. The peep-proof driving method of a display panel according to claim 20,

according to the peep-proof opening instruction, to the first electrode transmission drive signal that peep-proof opening instruction corresponds, include:

23. A display device, comprising:

the display panel of any one of claims 1-19.