CN219916125U - Display panel and display device - Google Patents

Abstract

The application provides a display panel and a display device. The display panel is provided with a plurality of sub-pixel areas, each pixel area comprises a plurality of sub-pixel areas, and the display panel comprises a first substrate, a second substrate and a liquid crystal layer, wherein the first substrate and the second substrate are oppositely arranged, and the liquid crystal layer is arranged between the first substrate and the second substrate; the electrochromic assembly is arranged on one side of the second substrate far away from the liquid crystal layer or one side of the first substrate far away from the liquid crystal layer; the electrochromic assembly comprises a plurality of electrochromic units and a first driving circuit; the color changing units are positioned in the pixel areas and are in one-to-one correspondence with the pixel areas or the sub-pixel areas; the first driving circuit comprises a plurality of pixel driving units, the pixel driving units are in one-to-one correspondence with the color changing units and are electrically connected, and the pixel driving units are used for controlling the color changing units to change colors so as to enable the color changing units to be switched between a transparent state and a black state or between the transparent state and a color state, and the color of the color changing units is different from the color of the corresponding color resistance layers. The display panel can improve contrast ratio and is applicable to the existing display panel.

Description

Display panel and display device

Technical Field

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

Background

The development time of the liquid crystal display device is long, the technology is mature, and the liquid crystal display device has the advantages of low cost, long service life, no radiation and the like, and is widely applied to the flat panel display fields such as liquid crystal televisions, mobile phones, computer screens, notebook computer screens, flat panels and the like.

At present, when the liquid crystal display panel is in use, the backlight module is required to provide a light source for the liquid crystal display panel, and when the display panel works, the backlight module is always in a bright state, so that the display panel is extremely easy to generate light leakage phenomenon when in a black state, and the contrast is sharply reduced due to insufficient black state.

Disclosure of Invention

The utility model provides a display panel and a display device, and aims to solve the problem that the contrast is reduced due to light leakage easily occurring in the black state of the existing display panel.

In order to solve the technical problems, the first technical scheme provided by the utility model is as follows: a display panel is provided. The display panel is provided with a plurality of pixel areas, and each pixel area comprises a plurality of sub-pixel areas; the display panel includes: a first substrate and a second substrate disposed opposite to each other, and a liquid crystal layer disposed between the first substrate and the second substrate;

The display panel further comprises an electrochromic assembly arranged on one side of the second substrate far away from the liquid crystal layer or one side of the first substrate far away from the liquid crystal layer; the electrochromic assembly includes:

the color changing units are positioned in the pixel areas and are in one-to-one correspondence with the pixel areas or in one-to-one correspondence with the sub-pixel areas;

the first driving circuit comprises a plurality of pixel driving units, wherein the pixel driving units are in one-to-one correspondence with the color changing units and are electrically connected, and the pixel driving units are used for controlling the color changing units to change colors so as to enable the color changing units to be switched between a transparent state and a black state or between the transparent state and a color state, and the color of the color changing units is different from that of the corresponding color resistance layers.

The color changing unit comprises a first electrode, a second electrode and a color changing layer, wherein the first electrode and the second electrode are opposite to each other along the direction perpendicular to the display panel and are arranged at intervals, and the first electrode is electrically connected with the pixel driving unit; the color-changing layer is arranged between the first electrode and the second electrode, the color-changing layer comprises electrochromic materials, and the first electrode and the second electrode are transparent electrodes;

The first driving circuit further comprises a plurality of data lines and a plurality of scanning lines, wherein the data lines are parallel to each other and extend along a first direction and are respectively positioned between adjacent pixel areas, and the scanning lines are parallel to each other and extend along a second direction and are respectively positioned between the adjacent pixel areas; the first direction intersects the second direction;

the pixel driving unit includes a driving transistor having a first end electrically connected to the first electrode for applying a voltage to the first electrode;

the control end of the driving transistor is electrically connected with the corresponding scanning line, and the second end of the driving transistor is electrically connected with the corresponding data line.

Wherein the electrochromic component is arranged on one side of the second substrate far away from the liquid crystal layer; the display panel further comprises a color resistance layer, wherein the color resistance layer is arranged on one side of the second substrate, which is close to the liquid crystal layer; the color resistance layer comprises a plurality of color resistance units, and the color resistance units are in one-to-one correspondence with the sub-pixel areas, so that the color change units cover at least one color resistance unit.

Wherein the display panel further comprises a third substrate and a fourth substrate; the third substrate is arranged on one side of the second substrate far away from the liquid crystal layer, and the electrochromic assembly is arranged on one side of the third substrate far away from the liquid crystal layer and is positioned between the third substrate and the fourth substrate; or, the third substrate and the fourth substrate are arranged on one side of the first substrate far away from the liquid crystal layer, and the electrochromic assembly is arranged between the third substrate and the fourth substrate;

The display panel further comprises a color resistance layer, wherein the color resistance layer is arranged on one side of the second substrate, which is close to the liquid crystal layer; the color resistance layer comprises a plurality of color resistance units, and the color resistance units are in one-to-one correspondence with the sub-pixel areas, so that the color change units cover at least one color resistance unit.

The display panel further comprises a peep-proof assembly, the peep-proof assembly comprises a third electrode, a fourth electrode and a peep-proof retaining wall, the third electrode and the fourth electrode are opposite to each other along the direction perpendicular to the display panel and are arranged at intervals, the peep-proof retaining wall is located between the third electrode and the fourth electrode and is arranged at the periphery of the sub-pixel area, and the peep-proof retaining wall comprises electrochromic materials.

The peep-proof retaining wall comprises a plurality of annular retaining walls, and the annular retaining walls are arranged around the circumference of the pixel area or the circumference of the sub-pixel area.

The display panel further comprises a support column, a fifth substrate and a flat layer; the electrochromic assembly is arranged on one side of the second substrate far away from the liquid crystal layer, and the flat layer is arranged on one side of the electrochromic assembly far away from the liquid crystal layer and covers the electrochromic assembly;

The peep-proof assembly is arranged between the flat layer and the fifth substrate, the third electrode is arranged on one side, far away from the liquid crystal layer, of the flat layer, the fourth electrode is arranged on one side, close to the liquid crystal layer, of the fifth substrate, and the peep-proof retaining wall is arranged between the third electrode and the fourth electrode;

the support column is arranged on one side of the flat layer, which is far away from the electrochromic assembly, and is adjacent to the peep-proof retaining wall, and the fifth substrate is arranged on one side of the support column, which is far away from the liquid crystal layer, so that two ends of the support column are respectively abutted to the flat layer and the fifth substrate.

Wherein the display panel further comprises support columns and a flat layer; wherein the electrochromic group is located between the third substrate and the fourth substrate; the third substrate is arranged on one side, far away from the liquid crystal layer, of the second substrate, and the flat layer is arranged on one side, far away from the third substrate, of the electrochromic assembly and covers the electrochromic assembly;

the peep-proof assembly is arranged between the flat layer and the fourth substrate, the third electrode is arranged on one side, far away from the third substrate, of the flat layer, the fourth electrode is arranged on one side, close to the third substrate, of the fourth substrate, and the peep-proof retaining wall is arranged between the third electrode and the fourth electrode; the support column is arranged on one side, far away from the liquid crystal layer, of the flat layer and is adjacent to the peep-proof retaining wall, and the fourth substrate is arranged on one side, far away from the liquid crystal layer, of the support column.

The display panel further comprises a support column and a fifth substrate; wherein the electrochromic assembly is located between the third and fourth substrates; the third substrate is arranged on one side of the first substrate far away from the liquid crystal layer, and the fourth substrate is arranged on one side of the third substrate far away from the liquid crystal layer;

the peep-proof assembly is arranged between the second substrate and the fifth substrate, the third electrode is arranged on one side, far away from the liquid crystal layer, of the second substrate, the fifth substrate is arranged on one side, far away from the liquid crystal layer, of the second substrate, the fourth electrode is arranged on one side, close to the second substrate, of the fifth substrate, and the peep-proof retaining wall is arranged between the third electrode and the fourth electrode; the support column is arranged on one side, far away from the liquid crystal layer, of the second substrate and is adjacent to the peep-proof retaining wall, and the fifth substrate is arranged on one side, far away from the liquid crystal layer, of the support column.

In order to solve the technical problems, a second technical scheme provided by the application is as follows: a display device is provided. The display device includes:

the display panel is used for displaying images, and the display panel is the display panel related to the technical scheme;

And the backlight module is used for providing backlight for the display panel.

The application has the beneficial effects that: in contrast to the prior art, the present application provides a display panel and a display device, wherein the display panel has a plurality of pixel regions, each pixel region includes a plurality of sub-pixel regions, and the display panel includes a first substrate and a second substrate disposed opposite to each other, and a liquid crystal layer disposed between the first substrate and the second substrate. The display panel also comprises an electrochromic component which is used for absorbing backlight from the backlight module when the display panel displays black state; the electrochromic assembly is arranged on one side of the second substrate far away from the liquid crystal layer or on one side of the first substrate far away from the liquid crystal layer, so that the electrochromic assembly can be directly prepared on the existing color film substrate with the color resistance layer and the black matrix prepared on one side of the second substrate or can be directly prepared on the existing array substrate with the TFT driving circuit layer prepared on one side of the first substrate, and the preparation flexibility is improved; the electrochromic assembly comprises a plurality of color changing units, the color changing units are located in pixel areas and are in one-to-one correspondence with the pixel areas or in one-to-one correspondence with the sub-pixel areas, and the color changing units are controlled to be switched between a transparent state and a black state through the pixel driving units which are in one-to-one correspondence with the color changing units and are electrically connected with the color changing units, so that the color changing units can realize a shading effect of a pixel level, the blackness of black displayed in the pixel areas of the display panel is improved, the light leakage problem during black display is effectively improved, and the contrast of image display is further effectively improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without any inventive effort for a person skilled in the art.

Fig. 1 is a schematic view showing a longitudinal sectional structure of a display panel according to a first embodiment of the present application;

FIG. 2 is a schematic top view of the display panel provided in the embodiment of FIG. 1;

fig. 3 is a schematic view of a longitudinal cross-sectional structure of a display panel according to a second embodiment of the present application;

FIG. 4 is a schematic top view of the display panel provided in the embodiment of FIG. 3;

fig. 5 is a schematic view showing a longitudinal cross-sectional structure of a display panel according to a third embodiment of the present application;

fig. 6 is a schematic view showing a longitudinal sectional structure of a display panel according to a fourth embodiment of the present application;

fig. 7 is a schematic view showing a longitudinal sectional structure of a display panel according to a fifth embodiment of the present application;

fig. 8 is a schematic view showing a longitudinal sectional structure of a display panel according to a sixth embodiment of the present application;

FIG. 9 is a schematic top view of the display panel provided in the embodiment of FIG. 8;

fig. 10 is a schematic view illustrating an anti-peeping principle of a display panel according to an embodiment of the application;

fig. 11 is a schematic view showing a longitudinal sectional structure of a display panel according to a seventh embodiment of the present application;

FIG. 12 is a schematic top view of the display panel provided in the embodiment of FIG. 11;

fig. 13 is a schematic view showing a longitudinal sectional structure of a display panel according to an eighth embodiment of the present application;

fig. 14 is a schematic view showing a longitudinal cross-sectional structure of a display panel according to a ninth embodiment of the application

Fig. 15 is a schematic structural diagram of a display device according to an embodiment of the application.

Reference numerals:

100-a display panel; 1-pixel area, 101-first sub-pixel area; 102-a second sub-pixel region; 103-a third sub-pixel region; 10-a first substrate; 11-a driving circuit layer; 20-a second substrate; 21-a color resist layer; 211-a first color resistance unit; 212-a second color resist unit; 213-a third color resistance unit; 22-black matrix; 30-a liquid crystal layer; 40-electrochromic assembly; 41-a color-changing unit; 411-a first electrode; 412-a second electrode; 413-a color-changing layer; 42-a drive transistor; 421-the control terminal; 422-a first end; 423-a second end; 43-scan lines; 44-data lines; 45-a flat layer; 50-a third substrate; 60-a fourth substrate; 70-a peep-proof assembly; 71-a third electrode; 72-a fourth electrode; 73-peep-proof retaining wall; 74-supporting columns; 80-a fifth substrate; 200-backlight module.

Detailed Description

The following describes embodiments of the present application in detail with reference to the drawings.

In the following description, for purposes of explanation and not limitation, specific details are set forth such as the particular system architecture, interfaces, techniques, etc., in order to provide a thorough understanding of the present application.

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

The terms "first," "second," "third," and the like in this disclosure are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", and "a third" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise. All directional indications (such as up, down, left, right, front, back … …) in embodiments of the present application are merely used to explain the relative positional relationship, movement, etc. between the components in a particular gesture (as shown in the drawings), and if the particular gesture changes, the directional indication changes accordingly. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed steps or elements but may include other steps or elements not listed or inherent to such process, method, article, or apparatus.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

The application will now be described in detail with reference to the drawings and examples.

Referring to fig. 1 and 2, fig. 1 is a schematic longitudinal sectional view of a display panel according to a first embodiment of the present application, and fig. 2 is a schematic top view of the display panel according to the embodiment of fig. 1. In the present embodiment, a display panel 100 is provided, the display panel 100 having a plurality of pixel regions 1, each pixel region 1 including a plurality of sub-pixel regions for mixing light to display an image. For example, each pixel region 1 includes a plurality of sub-pixel regions including a first sub-pixel region 101, a second sub-pixel region 102, and a third sub-pixel region 103, which are red, green, and blue sub-pixel regions, respectively; alternatively, in other embodiments, each pixel area 1 may also include a first sub-pixel area 101, a second sub-pixel area 102, a third sub-pixel area 103, and a fourth sub-pixel area, which are respectively a red sub-pixel area, a green sub-pixel area, a blue sub-pixel area, and a white sub-pixel area; or each pixel area 1 may also include more sub-pixel areas, which may be specifically set according to actual needs, which is not specifically limited; in the following embodiments, three sub-pixel regions, each of which includes the first sub-pixel region 101, the second sub-pixel region 102, and the third sub-pixel region 103, are exemplarily described, but not limited thereto.

In the present embodiment, the display panel 100 includes a first substrate 10 and a second substrate 20 disposed opposite to each other, and a liquid crystal layer 30 disposed between the first substrate 10 and the second substrate 20. The first substrate 10 is a transparent substrate, so that the backlight provided by the backlight module 200 can be transmitted, and a driving circuit layer 11 is further disposed between the first substrate 10 and the liquid crystal layer 30, so as to drive the liquid crystal molecules in the liquid crystal layer 30 to deflect, so as to change the polarization state of the light, and thus the light is transmitted or blocked, so as to realize image display.

The second substrate 20 is also a transparent substrate, so that light can pass through. A color resistance layer 21 is further disposed between the second substrate 20 and the liquid crystal layer 30, the color resistance layer 21 is disposed on one side of the second substrate 20 near the liquid crystal layer 30, the color resistance layer 21 includes a plurality of color resistance units, the color resistance units are in one-to-one correspondence with the sub-pixel regions, and cover the sub-pixel regions, so as to be used for filtering light into color light with corresponding colors, thereby realizing full color of the image. Specifically, the color resist units may include a first color resist unit 211, a second color resist unit 212, and a third color resist unit 213, and the first color resist unit 211, the second color resist unit 212, and the third color resist unit 213 may be a red color resist unit, a green color resist unit, and a blue color resist unit, correspondingly, the red resistance unit is correspondingly arranged in the red sub-pixel area, the green resistance unit is correspondingly arranged in the green sub-pixel area, and the blue resistance unit is correspondingly arranged in the blue sub-pixel area so as to respectively filter light into red light, green light and blue light. Further, between the adjacent color resist layers 21, a black matrix 22 is also provided for preventing cross color between pixels while improving contrast.

In the present embodiment, the display panel 100 further includes an electrochromic device 40, and the electrochromic device 40 is disposed on a side of the second substrate 20 away from the liquid crystal layer 30, for absorbing backlight from the backlight module 200 (see fig. 15) when displaying black. Specifically, the electrochromic assembly 40 includes a plurality of color changing units 41 and a first driving circuit; the color changing units 41 are located in the pixel area 1, correspond to the sub-pixel areas one by one and cover the sub-pixel areas, and the first driving circuit includes a plurality of pixel driving units, and the pixel driving units are connected with the color changing units 41 one by one and electrically, and are used for controlling the color changing units 41 to change colors so that the color changing units 41 are switched between a transparent state and a black state. Specifically, when the pixels on the display panel 100 are in a bright state, the color changing units 41 corresponding to the pixel areas 1 are in a transparent state, normal display of images is not affected, when the pixels on the display panel 100 are in a black state, the pixel driving units corresponding to the pixel areas 1 drive the corresponding color changing units 41 to be switched to a black state so as to absorb backlight of the backlight module 200, so that the color changing units 41 can realize light absorption effect of pixel levels, light leakage problem when the black state is displayed is effectively improved, blackness when the pixels are in the black state is improved, and contrast ratio of image display is effectively improved.

Further, in this embodiment, by disposing the electrochromic assembly 40 on the side of the second substrate 20 away from the liquid crystal layer 30, the electrochromic assembly 40 can be directly prepared on the side of the second substrate 20 away from the liquid crystal layer 30 on the basis that the color resist layer 21 and the black matrix 22 are already disposed on the side of the second substrate 20 to form a color film substrate, i.e. the original color film substrate can be directly used for preparing the display panel 100, without specially preparing the corresponding color film substrate again or changing the original color film substrate process, thereby improving the preparation flexibility and the utilization rate of the original substrate, and saving the production cost.

Specifically, as shown in fig. 1, the color-changing unit 41 includes a first electrode 411, a second electrode 412, and a color-changing layer 413, the first electrode 411 and the second electrode 412 being opposite and spaced apart along a direction perpendicular to the display panel 100, the first electrode 411 being electrically connected to the pixel driving unit for forming a vertical electric field; the color-changing layer 413 is disposed between the first electrode 411 and the second electrode 412 at intervals, so as to change color under the action of a vertical electric field formed by the first electrode 411 and the second electrode 412. Specifically, the color-changing layer 413 includes an electrochromic material, so that the color-changing layer 413 is in a transparent state in a normal state, and the color-changing layer 413 is converted from the transparent state to a black state under the action of an electric field, so as to be used for absorbing backlight; the first electrode 411 and the second electrode 412 are transparent electrodes so that backlight can pass therethrough without affecting image display, and the first electrode 411 and the second electrode 412 may be specifically formed by patterning a transparent conductive material, such as Indium Tin Oxide (ITO) or Indium Zinc Oxide (IZO). As shown in fig. 2, the specific shapes and sizes of the first electrode 411, the second electrode 412 and the color-changing layer 413 may be set according to the size of the pixel region 1 or the sub-pixel region to cover the pixel region 1 or the sub-pixel region, so that the backlight of the whole pixel region 1 can be absorbed when the pixel displays a black state, and the contrast is prevented from being reduced due to light leakage.

It is understood that the color-changing layer 413 may be a single layer of color-changing material capable of switching between transparent and black under the influence of an electric field. Or, the color-changing layer 413 may be a single layer of color-changing material, which can be switched between transparency and a certain color under the action of an electric field, and the color of the color-changing layer 413 is different from the color of the corresponding color-resisting layer 21; when the color-changing layer 413 is colored, the color-changing layer is laminated and arranged corresponding to the filter layers with different colors, and the color-resisting layer 21 and the corresponding color-changing layer 413 have different filter characteristics so as to realize a black state; for example, the first color resist unit 211, the second color resist unit 212, and the third color resist unit 213 may be a red color resist unit, a green color resist unit, and a blue color resist unit, respectively; the color-changing layers 413 disposed corresponding to the first, second and third color-resisting units 211, 212 and 213 may be green, blue and red.

The color-changing layer 413 may be a multi-layer color-changing material, for example, a double-layer color-changing material, where each layer of color-changing material can be switched between transparency and a certain color under the action of an electric field, and when the color-changing material is a color, it is similar to a color-blocking material, and only allows corresponding monochromatic light to pass through, and when the double-layer color-changing material is a color, it can block all the light of the color to present a black state. The first electrode 411 and the second electrode 412 may be arranged in two groups, and each of the two groups controls a layer of color-changing material to switch between transparent and a certain color.

Specifically, the first driving circuit includes a plurality of pixel driving units which are in one-to-one correspondence with the color changing units 41 and are electrically connected. The pixel driving unit includes a driving transistor 42, and the driving transistor 42 includes a control terminal 421, a first terminal 422, and a second terminal 423. The first end 422 of the driving transistor 42 is electrically connected to the first electrode 411, so as to apply a voltage to the first electrode 411, so that a vertical electric field is formed between the first electrode 411 and the second electrode 412, and the color-changing layer 413 is driven to switch between a transparent state and a black state under the action of the vertical electric field. In a specific embodiment, the control terminal 421 of the driving transistor 42 can be a gate, the first terminal 422 can be a drain, and the second terminal 423 can be a source.

As shown in fig. 2, the first driving circuit further includes a plurality of data lines 44 and a plurality of scan lines 43, the plurality of data lines 44 are parallel to each other and extend along the first direction Y, the data lines 44 are electrically connected to the second ends 423 of the driving transistors 42 for providing driving signals to the corresponding color changing units 41, and the plurality of data lines 44 are respectively located between the adjacent pixel areas 1; the scan lines 43 are parallel to each other and extend along the second direction X, the scan lines 43 are electrically connected to the control terminal 421 of the driving transistor 42, and are used for turning on the driving transistor 42 so that the corresponding color changing unit can receive the driving signal transmitted by the data line 44, the scan lines 43 are respectively located between the adjacent pixel regions 1, and the scan lines 43 and the data line 44 are specifically arranged in the same or similar manner as the driving scan lines and the driving data lines of the driving circuit layer 11 of the first substrate 10. The control terminal 421 is electrically connected to the corresponding scan line 43, and the second terminal 423 is connected to the corresponding data line 44; the first direction Y intersects the second direction X. Specifically, each color change unit 41 corresponds to one data line 44 and one scan line 43. For example, the resolution of the display panel 100 is 3m×n, the number of data lines 44 is 3m, the number of scan lines 43 is n, and the number of color change units 41 is (3 m×n).

Referring to fig. 3 and fig. 4, fig. 3 is a schematic longitudinal sectional view of a display panel according to a second embodiment of the present application, and fig. 4 is a schematic top view of the display panel according to the embodiment of fig. 3. In the present embodiment, a second display panel 100 is provided, unlike the first embodiment, in the present embodiment, the color changing units 41 are in one-to-one correspondence with the pixel areas 1, that is, all the sub-pixel areas in each pixel area 1 correspond to the same color changing unit 41. Further, the pixel driving units are in one-to-one correspondence and electrically connected with the color changing units 41, that is, the pixel units are also in one-to-one correspondence with the pixel areas 1, that is, all the sub-pixel areas in each pixel area 1 correspond to the same pixel driving unit.

As shown in fig. 4, in the present embodiment, the pixel driving unit only controls two gray scales, namely, the darkest and brightest, of the pixels, and then the driving voltages output from the pixel driving unit to all the sub-pixel areas of the corresponding pixel area 1 are the same, so that only one data line 44 is required to be correspondingly arranged in each pixel area 1; for example, if the resolution of the display panel 100 is 3 mxn, only the number of data lines 44 is m, the number of scan lines 43 is n, and the number of color change units 41 is (mxn). Compared with the first embodiment, the first driving circuit of the present embodiment can save two thirds of the data lines 44 and the driving transistors 42, and can achieve both the manufacturing process and the manufacturing cost without sacrificing the display quality, thereby improving the yield.

Referring to fig. 5, fig. 5 is a schematic longitudinal sectional view of a display panel according to a third embodiment of the application. In the present embodiment, a third display panel is provided, unlike the previous embodiment, in the present embodiment, the electrochromic assembly 40 is disposed on a side of the first substrate 10 away from the liquid crystal layer 30, and the color changing units 41 are disposed opposite to the corresponding color resisting units, so that the color changing units 41 cover at least one color resisting unit; specifically, the color changing units 41 are in one-to-one correspondence with the pixel areas 1, and the color changing units 41 cover three color resistance units, that is, the projection of the color changing units 41 on the first substrate 10 overlaps with the projection of the three color resistance units corresponding to the pixel areas 1 on the first substrate 10, so that when the pixel displays a black state, the color changing units 41 can absorb all backlight located in the pixel areas 1, light leakage is avoided, the blackness of the pixel when displaying the black state is improved, and the contrast is improved.

In this embodiment, by disposing the electrochromic assembly 40 on the side of the first substrate 10 far from the liquid crystal layer 30, the electrochromic assembly 40 can be directly prepared on the other side of the first substrate 10 on the basis that the driving circuit layer 11 is disposed on one side of the first substrate 10 to form an array substrate, i.e. the original array substrate can be directly used for preparing the display panel 100, and the corresponding array substrate does not need to be specially prepared again, so that the preparation flexibility and the utilization rate of the original substrate are improved, and the production cost is saved.

Referring to fig. 6, fig. 6 is a schematic longitudinal sectional view of a display panel according to a fourth embodiment of the application. In the present embodiment, a fourth display panel 100 is provided, unlike the above embodiments, in the present embodiment, the display panel 100 further includes a third substrate 50 and a fourth substrate 60; the third substrate 50 is disposed on a side of the second substrate 20 away from the liquid crystal layer 30, and the electrochromic device 40 is disposed on a side of the third substrate 50 away from the liquid crystal layer 30 and between the third substrate 50 and the fourth substrate 60; the color resist units are in one-to-one correspondence with the sub-pixel regions, so that the color change unit 41 covers at least one color resist unit. That is, the electrochromic assembly 40 forms an independent electrochromic substrate with the third substrate 50 and the fourth substrate 60 and is prepared separately from the color film substrate and the array substrate, so that the electrochromic assembly 40 can be prepared independently to form the electrochromic substrate to be directly applied to the existing display panel 100, and can be prepared simultaneously with the array substrate and the color film substrate in the process of the display panel 100, thereby effectively saving the production time and improving the yield.

Referring to fig. 7, fig. 7 is a schematic longitudinal sectional view of a display panel according to a fifth embodiment of the application. In the present embodiment, a fifth display panel 100 is provided, unlike the previous embodiment, in the present embodiment, the third substrate 50 and the fourth substrate 60 are disposed at a side of the first substrate 10 away from the liquid crystal layer 30, and the electrochromic device 40 is disposed between the third substrate 50 and the fourth substrate 60; the color resist units are in one-to-one correspondence with the sub-pixel regions, so that the color change unit 41 covers at least one color resist unit. That is, the electrochromic device 40 forms an independent electrochromic substrate with the third substrate 50 and the fourth substrate 60, and the electrochromic substrate is disposed at the outer side of the first substrate 10 and is closer to the backlight module 200, so that the backlight can be prevented from being diffused, and the entire backlight in the pixel area 1 can be absorbed, thereby further improving the blackness and the contrast ratio.

Referring to fig. 8 and 9, fig. 8 is a schematic longitudinal sectional view of a display panel according to a sixth embodiment of the application, and fig. 9 is a schematic top view of the display panel according to the embodiment of fig. 8. In this embodiment, a sixth display panel 100 is provided, and the display panel 100 further includes a peep-proof assembly 70. The peep-proof assembly 70 includes a third electrode 71, a fourth electrode 72, and a peep-proof wall 73, the third electrode 71 and the fourth electrode 72 are opposite to each other along a direction perpendicular to the display panel 100 and are arranged at intervals, the peep-proof wall 73 is located between the third electrode 71 and the fourth electrode 72 and is arranged at the periphery of the sub-pixel region, and the peep-proof wall 73 includes electrochromic material, so that the peep-proof wall 73 can be switched between a transparent state and a non-transparent state under the action of an electric field between the third electrode 71 and the fourth electrode 72, thereby realizing a peep-proof mode and a sharing mode of the display panel 100. That is, the peep-proof mode means that the peep-proof retaining wall 73 is in a non-transparent state, so that the image information displayed on the display panel 100 is only read by the front face of the user, and the displayed image information cannot be seen only by black or other colors in the side view around the display panel; the sharing mode means that the privacy wall 73 is in a transparent state so that image information displayed on the display panel 100 can be normally read by different users from the front and side at the same time.

In this embodiment, the display panel 100 may further include a second driving circuit (not shown) electrically connected to the third electrode 71 and the fourth electrode 72 for controlling the peep-preventing wall 73 so as to switch the peep-preventing wall 73 between the transparent state and the non-transparent state. Specifically, the second driving circuit applies a voltage to the third electrode 71 or the fourth electrode 72, so that an electric field is formed between the third electrode 71 and the fourth electrode 72, the peep-proof wall 73 in the electric field is changed from a transparent state to a non-transparent state, and the non-transparent state can be black or other colors, so as to reduce the angle of the visible area of the display panel 100, so that the information displayed by the display panel 100 can only be read by the front face of the user, and the peep-proof effect can be achieved by observing only black or other colors around. When the peep-proof wall 73 is of other colors, such as red, although the light of the red sub-pixel can transmit light, the light of the green and blue sub-pixels can be blocked, and the surrounding side view can only see one red but can not acquire the display information of the display panel, thereby playing a peep-proof role.

Specifically, the third electrode 71 and the fourth electrode 72 are disposed opposite to each other in a direction perpendicular to the display panel 100, and the peep-preventing wall 73 includes a plurality of annular walls disposed around the circumference of the pixel region 1 or around the circumference of the sub-pixel region. As shown in fig. 9, the peep-proof wall 73 includes a plurality of annular walls, which are in one-to-one correspondence with the sub-pixel regions and are disposed around the periphery of the sub-pixel regions to enclose the periphery of the sub-pixel regions, so as to prevent the outgoing light of the display panel 100 from being dispersed to the periphery. Specifically, the plurality of annular retaining walls can be integrally formed, or a plurality of annular retaining walls can be formed by surrounding the annular retaining walls, and the annular retaining walls can be specifically arranged according to actual needs without specific limitation.

In the present embodiment, the display panel 100 further includes a support post 74, a fifth substrate 80, and a planarization layer 45; the electrochromic assembly 40 is arranged on one side of the second substrate 20 away from the liquid crystal layer 30, and the flat layer 45 is arranged on one side of the electrochromic assembly 40 away from the liquid crystal layer 30 and covers the electrochromic assembly 40; the peep-proof assembly 70 is disposed between the flat layer 45 and the fifth substrate 80, the third electrode 71 is disposed on a surface of the flat layer 45 on a side away from the liquid crystal layer 30, the fourth electrode 72 is disposed on a surface of the fifth substrate 80 on a side close to the liquid crystal layer 30, and the peep-proof wall 73 is disposed between the third electrode 71 and the fourth electrode 72. The support columns 74 are disposed on a side of the flat layer 45 away from the electrochromic assembly 40 and adjacent to the peep-preventing wall 73, and the fifth substrate 80 is disposed on a side of the support columns 74 away from the liquid crystal layer 30, so that two ends of the support columns 74 respectively abut against the flat layer 45 and the fifth substrate 80, and are used for supporting the flat layer 45 and the fifth substrate 80 to protect the peep-preventing assembly 70 from being damaged due to external force.

The second driving circuit may be disposed on the fifth substrate 80 or the flat layer 45, and may be specifically disposed according to practical needs, which is not limited in particular, and when the peep-proof wall 73 is controlled, all the third electrodes 71 and the fourth electrodes 72 are uniformly controlled, that is, all the third electrodes 71 apply the same voltage, and all the fourth electrodes 72 apply the same voltage, so as to simplify the second driving circuit, facilitate production and preparation, and save production cost.

In other embodiments, the second driving circuit may not be provided, the peep-proof assembly 70 may adopt a passive driving mode, and an external control circuit or an internal wiring is provided to be electrically connected with the third electrode 71 and the fourth electrode 72, so as to apply a voltage to the third electrode 71 and/or the fourth electrode 72, so that an electric field is formed between the third electrode 71 and the fourth electrode 72, and the peep-proof wall 73 in the electric field is changed from a transparent state to a non-transparent state, thereby realizing the peep-proof effect.

Referring to fig. 10, fig. 10 is a schematic view illustrating a peep-proof principle of a display panel according to an embodiment of the application. Specifically, the annular retaining wall is disposed around the periphery of the pixel area 1, and the height of the annular retaining wall can be set according to actual needs, so as to control the viewing angle of the display panel 100 in the peep-proof mode. When the display panel 100 displays an image, the center point of the pixel area 1 is taken as the center, the straight line from the center to the highest point of the retaining wall is taken as the boundary line, a visual angle alpha is formed, when the display panel 100 is in the peep-proof mode, the emergent light of each pixel area 1 can only emerge within the visual angle alpha range, the light in the other angle ranges is absorbed or filtered into light with other colors by the peep-proof retaining wall 73, so that the information displayed by the display panel 100 can only be specially read by the front face of a user, and the surrounding side can only see black or other colors, thereby achieving the peep-proof effect.

Referring to fig. 11 and 12, fig. 11 is a schematic longitudinal sectional view of a display panel according to a seventh embodiment of the application, and fig. 12 is a schematic top view of the display panel according to the embodiment of fig. 11. In the present embodiment, a seventh display panel 100 is provided, unlike the previous embodiment, in this embodiment, the peep-proof wall 73 includes a plurality of annular walls, which are in one-to-one correspondence with the pixel regions 1 and are disposed around the periphery of the pixel regions 1 to surround the periphery of the pixel regions 1 entirely, so as to prevent the outgoing light of the display panel 100 from being dispersed toward the periphery. In this embodiment, the annular retaining wall is disposed around the periphery of the pixel area 1, and compared with the previous embodiment, the area enclosed by the annular retaining wall is relatively larger, so that on one hand, the material of the peep-proof retaining wall 73 can be saved, and on the other hand, the cost can be saved, and on the other hand, the transmittance of the display panel 100 can be effectively ensured, and the problem that the display brightness and the power consumption increase are influenced due to the fact that the transmittance of the display panel 100 is reduced due to the larger distribution density of the peep-proof retaining wall 73 is avoided.

Referring to fig. 13, fig. 13 is a schematic longitudinal sectional view of a display panel according to an eighth embodiment of the application. In the present embodiment, an eighth display panel 100 is provided, wherein the electrochromic device 40 is located between the third substrate 50 and the fourth substrate 60; the third substrate 50 is disposed on a side of the second substrate 20 away from the liquid crystal layer 30, and the planarization layer 45 is disposed on a side of the electrochromic element 40 away from the third substrate 50 and covers the electrochromic element 40. The peep-proof assembly 70 is disposed between the flat layer 45 and the fourth substrate 60, specifically, the third electrode 71 is disposed on a side of the flat layer 45 away from the third substrate 50 and on a surface of the flat layer 45, the fourth electrode 72 is disposed on a side of the fourth substrate 60 near the third substrate 50 and on a surface of the fourth substrate 60, and the peep-proof wall 73 is disposed between the third electrode 71 and the fourth electrode 72. The support columns 74 are disposed on a side of the flat layer 45 away from the liquid crystal layer 30 and adjacent to the peep-proof wall 73, and the fourth substrate 60 is disposed on a side of the support columns 74 away from the liquid crystal layer 30.

It can be understood that in this embodiment, the electrochromic device 40 and the peep-proof device 70 are disposed between the third substrate 50 and the fourth substrate 60 to form a single electrochromic substrate with both the peep-proof function and the backlight absorbing function, and the electrochromic substrate can be applied to the existing display panel 100, so as to improve the application range thereof.

Fig. 14 is a schematic view showing a longitudinal sectional structure of a display panel according to a ninth embodiment of the present application. In the present embodiment, a ninth display panel 100 is provided. Wherein the electrochromic element 40 is located between the third substrate 50 and the fourth substrate 60; the third substrate 50 and the fourth substrate 60 are disposed on a side of the first substrate 10 away from the liquid crystal layer 30; the peep-proof assembly 70 is disposed on a side of the second substrate 20 away from the liquid crystal layer 30, specifically disposed between the second substrate 20 and the fifth substrate 80, the fifth substrate 80 is disposed on a side of the second substrate 20 away from the liquid crystal layer, the third electrode 71 is disposed on a side of the second substrate 20 away from the liquid crystal layer 30 and on a surface of the second substrate 20, the fourth electrode 72 is disposed on a side of the fifth substrate 80 close to the second substrate 20 and on a surface of the fifth substrate 80, and the peep-proof wall 73 is disposed between the third electrode 71 and the fourth electrode 72. The support columns 74 are disposed on a side of the second substrate 20 away from the liquid crystal layer 30 and adjacent to the peep-proof wall 73, so as to support the second substrate 20 and the fifth substrate 80, thereby preventing the peep-proof assembly 70 from being damaged due to deformation of the fifth substrate 80 caused by external force.

Unlike the previous embodiment, in the present embodiment, the electrochromic device 40 is located between the third substrate 50 and the fourth substrate 60, and an electrochromic substrate is separately formed, and the electrochromic substrate is disposed on the outer side of the first substrate 10 and is closer to the backlight module 200, so as to improve the light absorption effect, thereby further improving the blackness of the pixel and improving the contrast ratio; the peep-proof assembly 70 is disposed on the second substrate 20 and located outside the display panel 100 to achieve the peep-proof effect.

In other embodiments, the electrochromic material may also include a thermochromic material, and the third electrode 71 and the fourth electrode 72 are electrically connected to the peep-proof wall 73 for controlling the temperature of the thermochromic material, so that the peep-proof wall 73 is switched between a transparent state and a non-transparent state, thereby realizing the peep-proof effect, so that the display panel 100 can be freely switched between the peep-proof mode and the sharing mode.

Referring to fig. 15, fig. 15 is a schematic structural diagram of a display device according to an embodiment of the application. In this embodiment, a display device is provided, which includes a display panel 100 and a backlight module 200, and the display device can improve the blackness of pixels, so as to effectively improve the contrast ratio and the display quality, and the display device can be freely switched between a peep-proof mode and a sharing mode, so that the use privacy is improved.

The backlight module 200 is used for providing backlight to the display panel 100, and the backlight module 200 may be a side-in backlight module 200 or a direct-down backlight module 200, which may be specifically selected and designed according to actual needs, and is not particularly limited.

The display panel 100 is disposed on one side of the light emitting surface of the backlight module 200, so as to realize image display by receiving backlight. The specific structure and function of the display panel 100 are the same as or similar to those of the above embodiments, and the same technical effects can be achieved, and specific reference is made to the above detailed description, which is not repeated here.

The foregoing is only the embodiments of the present application, and therefore, the patent protection scope of the present application is not limited thereto, and all equivalent structures or equivalent flow changes made by the content of the present specification and the accompanying drawings, or direct or indirect application in other related technical fields, are included in the patent protection scope of the present application.

Claims (10)

1. A display panel having a plurality of pixel regions, each of the pixel regions including a plurality of sub-pixel regions, the display panel comprising: a first substrate and a second substrate disposed opposite to each other, and a liquid crystal layer disposed between the first substrate and the second substrate;

The display panel is characterized by further comprising an electrochromic assembly arranged on one side of the second substrate far away from the liquid crystal layer or one side of the first substrate far away from the liquid crystal layer; the electrochromic assembly includes:

the color changing units are positioned in the pixel areas and are in one-to-one correspondence with the pixel areas or in one-to-one correspondence with the sub-pixel areas;

the first driving circuit comprises a plurality of pixel driving units, wherein the pixel driving units are in one-to-one correspondence with the color changing units and are electrically connected, and the pixel driving units are used for controlling the color changing units to change colors so as to enable the color changing units to be switched between a transparent state and a black state or between the transparent state and a color state, and the color of the color changing units is different from that of the corresponding color resistance layers.

2. The display panel according to claim 1, wherein the color change unit includes a first electrode, a second electrode, and a color change layer, the first electrode and the second electrode being opposite to and spaced apart from each other in a direction perpendicular to the display panel, the first electrode being electrically connected to the pixel driving unit; the color-changing layer is arranged between the first electrode and the second electrode, the color-changing layer comprises electrochromic materials, and the first electrode and the second electrode are transparent electrodes;

The first driving circuit further comprises a plurality of data lines and a plurality of scanning lines, wherein the data lines are parallel to each other and extend along a first direction and are respectively positioned between adjacent pixel areas, and the scanning lines are parallel to each other and extend along a second direction and are respectively positioned between the adjacent pixel areas; the first direction intersects the second direction;

the pixel driving unit includes a driving transistor having a first end electrically connected to the first electrode for applying a voltage to the first electrode;

the control end of the driving transistor is electrically connected with the corresponding scanning line, and the second end of the driving transistor is electrically connected with the corresponding data line.

3. The display panel of claim 2, wherein the electrochromic element is disposed on a side of the second substrate remote from the liquid crystal layer; the display panel further comprises a color resistance layer, wherein the color resistance layer is arranged on one side of the second substrate, which is close to the liquid crystal layer; the color resistance layer comprises a plurality of color resistance units, and the color resistance units are in one-to-one correspondence with the sub-pixel areas, so that the color change units cover at least one color resistance unit.

4. The display panel of claim 2, further comprising a third substrate and a fourth substrate; the third substrate is arranged on one side of the second substrate far away from the liquid crystal layer, and the electrochromic assembly is arranged on one side of the third substrate far away from the liquid crystal layer and is positioned between the third substrate and the fourth substrate; or, the third substrate and the fourth substrate are arranged on one side of the first substrate far away from the liquid crystal layer, and the electrochromic assembly is arranged between the third substrate and the fourth substrate;

the display panel further comprises a color resistance layer, wherein the color resistance layer is arranged on one side of the second substrate, which is close to the liquid crystal layer; the color resistance layer comprises a plurality of color resistance units, and the color resistance units are in one-to-one correspondence with the sub-pixel areas, so that the color change units cover at least one color resistance unit.

5. The display panel of any one of claims 1-4, further comprising a privacy module comprising a third electrode, a fourth electrode, and privacy walls disposed opposite and spaced apart from the fourth electrode in a direction perpendicular to the display panel, the privacy walls being disposed between the third electrode and the fourth electrode and disposed at a periphery of the sub-pixel region, the privacy walls comprising electrochromic material.

6. The display panel of claim 5, wherein the privacy retaining wall comprises a plurality of annular retaining walls disposed around a circumference of the pixel region or around a circumference of the sub-pixel region.

7. The display panel of claim 5, further comprising support posts, a fifth substrate, and a planar layer; the electrochromic assembly is arranged on one side of the second substrate far away from the liquid crystal layer, and the flat layer is arranged on one side of the electrochromic assembly far away from the liquid crystal layer and covers the electrochromic assembly;

the peep-proof assembly is arranged between the flat layer and the fifth substrate, the third electrode is arranged on one side, far away from the liquid crystal layer, of the flat layer, the fourth electrode is arranged on one side, close to the liquid crystal layer, of the fifth substrate, and the peep-proof retaining wall is arranged between the third electrode and the fourth electrode;

the support column is arranged on one side of the flat layer, which is far away from the electrochromic assembly, and is adjacent to the peep-proof retaining wall, and the fifth substrate is arranged on one side of the support column, which is far away from the liquid crystal layer, so that two ends of the support column are respectively abutted to the flat layer and the fifth substrate.

8. The display panel of claim 5, further comprising support posts and a planar layer; wherein the electrochromic assembly is located between the third substrate and the fourth substrate; the third substrate is arranged on one side, far away from the liquid crystal layer, of the second substrate, and the flat layer is arranged on one side, far away from the third substrate, of the electrochromic assembly and covers the electrochromic assembly;

the peep-proof assembly is arranged between the flat layer and the fourth substrate, the third electrode is arranged on one side, far away from the third substrate, of the flat layer, the fourth electrode is arranged on one side, close to the third substrate, of the fourth substrate, and the peep-proof retaining wall is arranged between the third electrode and the fourth electrode; the support column is arranged on one side, far away from the liquid crystal layer, of the flat layer and is adjacent to the peep-proof retaining wall, and the fourth substrate is arranged on one side, far away from the liquid crystal layer, of the support column.

9. The display panel of claim 5, further comprising a support post and a fifth substrate; wherein the electrochromic assembly is located between the third substrate and the fourth substrate; the third substrate is arranged on one side of the first substrate far away from the liquid crystal layer, and the fourth substrate is arranged on one side of the third substrate far away from the liquid crystal layer;

The peep-proof assembly is arranged between the second substrate and the fifth substrate, the third electrode is arranged on one side, far away from the liquid crystal layer, of the second substrate, the fifth substrate is arranged on one side, far away from the liquid crystal layer, of the second substrate, the fourth electrode is arranged on one side, close to the second substrate, of the fifth substrate, and the peep-proof retaining wall is arranged between the third electrode and the fourth electrode; the support column is arranged on one side, far away from the liquid crystal layer, of the second substrate and is adjacent to the peep-proof retaining wall, and the fifth substrate is arranged on one side, far away from the liquid crystal layer, of the support column.

10. A display device, comprising:

a display panel for displaying an image, the display panel being as claimed in any one of claims 1 to 9;

and the backlight module is used for providing backlight for the display panel.