CN217982062U

CN217982062U - Display panel and display device

Info

Publication number: CN217982062U
Application number: CN202222293920.XU
Authority: CN
Inventors: 唐剑; 李海波; 李荣荣
Original assignee: HKC Co Ltd
Current assignee: HKC Co Ltd
Priority date: 2022-08-29
Filing date: 2022-08-29
Publication date: 2022-12-06
Anticipated expiration: 2032-08-29

Abstract

The application relates to a display panel and a display device, wherein the display panel comprises a display box, the display box comprises a first substrate, a second substrate and a first liquid crystal molecular layer, the second substrate is arranged opposite to the first substrate in a box-to-box mode, and the first liquid crystal molecular layer is arranged between the first substrate and the second substrate; the display panel further includes: the visual angle control box is arranged in a laminated manner with the display box and is a twisted nematic liquid crystal box; the visual angle control box comprises a third substrate, a fourth substrate and a second liquid crystal molecular layer, wherein the fourth substrate is arranged opposite to the third substrate, the second liquid crystal molecular layer is arranged between the third substrate and the fourth substrate, and the third substrate is arranged on one side of the second substrate, which is far away from the first substrate; the third substrate is provided with a first electrode, the fourth substrate is provided with a second electrode, the first electrode and the second electrode are oppositely arranged, and the voltage difference between the first electrode and the second electrode is used for switching between a single-side peep-proof visual angle and a wide visual angle. According to the scheme, the switching between the single-side peep-proof visual angle and the wide visual angle is realized by controlling the voltage difference in the visual angle control box.

Description

Display panel and display device

Technical Field

The application belongs to the technical field of display, and particularly relates to a display panel and a display device.

Background

Displays are applied in various aspects of daily life of people, and different application occasions have different requirements on the viewing angle of a display panel, for example, when a user is in an environment with sharing requirements, such as sharing content, a wider viewing angle is required; when the user is in an open environment with privacy requirements, the display is required to have a narrow viewing angle to achieve the purpose of peep prevention and protect personal privacy.

At present, a display panel with single-sided peep prevention and switching between a single-sided peep prevention viewing angle and a wide viewing angle are technical problems to be solved urgently by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

An object of the application is to provide a display panel and display device, can realize switching over each other between unilateral peep-proof visual angle and the wide visual angle.

A first aspect of the present application provides a display panel, including a display box, where the display box includes a first substrate, a second substrate arranged opposite to the first substrate, and a first liquid crystal molecular layer arranged between the first substrate and the second substrate; the display panel further includes:

the visual angle control box is arranged in a laminated mode with the display box and is a twisted nematic liquid crystal box; the visual angle control box comprises a third substrate, a fourth substrate and a second liquid crystal molecular layer, wherein the fourth substrate is arranged opposite to the third substrate, the second liquid crystal molecular layer is arranged between the third substrate and the fourth substrate, and the third substrate is arranged on one side, far away from the first substrate, of the second substrate;

the third substrate is provided with a first electrode, the fourth substrate is provided with a second electrode, the first electrode and the second electrode are oppositely arranged, and the voltage difference between the first electrode and the second electrode is used for switching between a single-side peep-proof visual angle and a wide visual angle.

In an exemplary embodiment of the present application, a first polarizer is disposed on a side of the third substrate away from the fourth substrate, and a side of the first polarizer away from the third substrate is attached to the second substrate; a second polarizer is arranged on one side, away from the third substrate, of the fourth substrate, and absorption axes and transmission axes of the second polarizer and the first polarizer are parallel to each other;

a first alignment layer is arranged on one side of the third substrate close to the second liquid crystal molecular layer, a second alignment layer is arranged on one side of the fourth substrate close to the second liquid crystal molecular layer, and the alignment directions of the first alignment layer and the second alignment layer are perpendicular to each other.

In one exemplary embodiment of the present application, the alignment direction of the first alignment layer is 30 ° to 60 °, and the alignment direction of the second alignment layer is 120 ° to 150 °.

In one exemplary embodiment of the present application, the alignment direction of the first alignment layer is 45 ° and the alignment direction of the second alignment layer is 135 °.

In an exemplary embodiment of the present application, a voltage difference corresponding to the single-sided peep-proof viewing angle is smaller than a voltage difference corresponding to the wide viewing angle.

In an exemplary embodiment of the present application, when the single-sided privacy viewing angle is switched to the wide viewing angle, the optical rotation of the liquid crystal molecules in the second liquid crystal layer gradually decreases.

In an exemplary embodiment of the present application, at the time of the one-sided peep-proof viewing angle, the one-sided peep-proof viewing angle has a peep-proof side and a normal display side, a birefringence of liquid crystal molecules at the peep-proof side is greater than a birefringence of liquid crystal molecules at the normal display side, and an amount of light emitted from the peep-proof side is smaller than an amount of light emitted from the normal display side.

In an exemplary embodiment of the present application, the long axes of the liquid crystal molecules of the second liquid crystal layer are perpendicular to the third and fourth substrates at the wide viewing angle.

In one exemplary embodiment of the present application, the display cell is an IPS mode liquid crystal display cell.

The second aspect of the application provides a display device, which comprises a backlight module and the display panel, wherein the backlight module is arranged on one side of the display box, which is far away from the visual angle control box.

The scheme of the application has the following beneficial effects:

the display panel comprises a display box and a visual angle control box, wherein the voltage difference between a first electrode and a second electrode on the upper side and the lower side of the visual angle control box is used for controlling the deflection of twisted nematic liquid crystal molecules, so that the switching between a single-side peep-proof visual angle and a wide visual angle is realized; in addition, the absorption axis and the transmission axis of the first polarizer and the second polarizer on the viewing angle control box are parallel to each other, so that the vibration directions of the incoming light and the outgoing light are the same.

Other features and advantages of the present application will be apparent from the following detailed description, or may be learned by practice of the application.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application. It is obvious that the drawings in the following description are only some embodiments of the application, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

Fig. 1 is a schematic structural diagram of a display panel provided in one or two embodiments of the present application when the display panel is not powered on;

fig. 2 is a schematic structural diagram illustrating a viewing angle control box in a single-side peep-proof viewing angle according to a first embodiment of the present application;

fig. 3 is a schematic structural diagram illustrating a wide viewing angle of a viewing angle control box according to an embodiment of the present application;

FIG. 4 is a diagram illustrating an angle between a light vibration direction and a light transmission axis when no power is applied according to an embodiment of the present application;

fig. 5 illustrates an included angle between a light vibration direction and a light transmission axis when a single-side peep-proof narrow viewing angle is provided in an embodiment of the present application;

fig. 6 is a schematic perspective view illustrating a first alignment layer and a second alignment layer and a first polarizer and a second polarizer in a single-sided privacy-protection narrow viewing angle according to an embodiment of the present disclosure;

fig. 7 is a schematic perspective view illustrating a first alignment layer and a second alignment layer and a first polarizer and a second polarizer at a wide viewing angle according to an embodiment of the present disclosure;

FIG. 8 shows a schematic representation of the birefringence of the privacy side and normal display side at narrow viewing angles for single-sided privacy provided by example one of the present application;

FIG. 9 is a schematic diagram showing birefringence at a wide viewing angle provided by example one of the present application;

10A-10D are graphs showing transmittance profiles of a display panel at different voltages according to an embodiment of the present disclosure;

FIG. 11 is a graph showing a penetration versus a viewing angle of a display panel at different voltages according to an embodiment of the present application;

fig. 12 is a schematic structural diagram of a display device according to a second embodiment of the present application.

Description of reference numerals:

1. a display device; 10. a display panel; 100. a display box; 101. a first substrate; 102. a second substrate; 103. a first layer of liquid crystal molecules; 200. a viewing angle control box; 201. a third substrate; 202. a fourth substrate; 203. a second layer of liquid crystal molecules; 204. a first electrode; 205. a second electrode; 206. a first alignment layer; 207. a second alignment layer; 300. a first polarizer; 400. a second polarizer; 500. an absorption axis; 600. a light transmissive shaft; 700. a peep-proof side; 800. a normal display side; 20. a backlight module; A. axial direction of the absorption shaft; B. an axial direction of the light transmission shaft; l, light vibration direction; x, the alignment direction of the first alignment layer; y, the alignment direction of the second alignment layer.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art.

In the present application, the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or as implying a number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," and the like are to be construed broadly and include, for example, fixed connections, removable connections, or integral connections; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the application. One skilled in the relevant art will recognize, however, that the subject matter of the present application can be practiced without one or more of the specific details, or with other methods, components, devices, steps, and so forth. In other instances, well-known methods, devices, implementations, or operations have not been shown or described in detail to avoid obscuring aspects of the application.

Example one

Referring to fig. 1, a display panel 10 according to an embodiment of the present disclosure includes a display box 100 and a viewing angle control box 200, where the viewing angle control box 200 and the display box 100 are stacked.

Optionally, the viewing angle control box 200 is disposed on a side of the display box 100 away from the backlight module 20, that is, the display box 100 is located between the viewing angle control box 200 and the backlight module 20, the display box 100 is configured to control a display image of the display panel 10, and the viewing angle control box 200 is configured to control switching between a single-side peep-proof viewing angle and a wide viewing angle.

As shown in fig. 1, the display cell 100 includes a first substrate 101, a second substrate 102 disposed opposite to the first substrate 101, and a first liquid crystal molecular layer 103 disposed between the first substrate 101 and the second substrate 102.

Illustratively, the display cell 100 is an IPS (In Plane Switching) type liquid crystal display cell 100, the first substrate 101 is an array substrate, the second substrate 102 is an opposite substrate, and the first liquid crystal molecule layer 103 employs negative liquid crystal molecules, i.e., liquid crystal molecules having negative dielectric anisotropy, which have higher transmittance and higher contrast than positive liquid crystal molecules. In the initial state, the negative liquid crystal molecules in the first liquid crystal molecule layer 103 are aligned parallel to the array substrate and the counter substrate, and when a voltage is applied to the pixel electrode on the array substrate and another voltage is applied to the common electrode on the counter substrate, a voltage difference is formed between the two substrates, causing the liquid crystal molecules to deflect in-plane. In addition, the opposite substrate is provided with color resistance layers arranged in an array manner and black matrixes for separating the color resistance layers, and the color resistance layers comprise color resistance materials of three colors of red (R), green (G) and blue (B) and correspondingly form sub-pixels of the three colors of red (R), green (G) and blue (B).

The display cell 100 is not limited to the IPS (In Plane Switching) type liquid crystal display cell 100, and may be a VA (vertical alignment) type liquid crystal display cell 100 or other types of liquid crystal display cells 100.

In addition, the first substrate 101 and the second substrate 102 may be made of glass, acrylic, polycarbonate, or the like; the color resist layer includes, but is not limited to, the above three color resist materials, and may also be four or more, for example, the color resist layer includes red (R), green (G), blue (B), and white (W).

Similarly, referring to fig. 1 or 2, the viewing angle controlling cell 200 also includes a third substrate 201, a fourth substrate 202 disposed opposite to the third substrate 201, and a second liquid crystal layer 203 disposed between the third substrate 201 and the fourth substrate 202.

Illustratively, the viewing angle control cell 200 is a TN (Twisted Nematic) type liquid crystal cell; the third substrate 201 may be an array substrate, the fourth substrate 202 may be an opposite substrate, and the third substrate 201 and the second substrate 102 are bonded on a side away from the first substrate 101. Like this, adopt the mode of laminating to make the clearance between display box 100 and the visual angle control box 200 reduce, avoid the light leak, in addition, adopt the mode of laminating also can reduce whole display panel 10's thickness, the laminating is convenient.

As shown in fig. 1 or fig. 2, a first electrode 204 is disposed on the third substrate 201, and a second electrode 205 is disposed on the fourth substrate 202. The first electrode 204 may be a pixel electrode, the second electrode 205 may be a common electrode, liquid crystal molecules in the second liquid crystal molecule layer 203 are disposed between the pixel electrode and the common electrode, and the deflection angle of the liquid crystal molecules is controlled by controlling the voltage difference between the pixel electrode and the common electrode, so that switching between a single-side peep-proof viewing angle and a wide viewing angle can be achieved.

The material of the first electrode 204 and the second electrode 205 may be Indium Tin Oxide (ITO), indium Zinc Oxide (IZO), or the like.

It is worth mentioning that the requirements of different single-side peep-proof viewing angles can be realized according to the voltage difference so as to achieve the function of controllable viewing angle. That is, different single-sided peep-proof viewing angles can be selected according to the required environment; for example, left-side privacy, right-side privacy, or upper-left privacy, etc. may be implemented.

In addition, as shown in fig. 4 to 7, alignment layers are further disposed on the third and

fourth substrates

201 and 202 for aligning liquid crystal molecules in the second liquid crystal molecule layer 203.

For example, as shown in fig. 6, a first alignment layer 206 is disposed on a side of the third substrate 201 close to the second liquid crystal molecule layer 203, a second alignment layer 207 is disposed on a side of the fourth substrate 202 close to the second liquid crystal molecule layer 203, and an alignment direction X of the first alignment layer 206 is perpendicular to an alignment direction Y of the second alignment layer 207. And, the deflection angle of the liquid crystal molecules immediately adjacent to the third substrate 201 is the same as the alignment direction X of the first alignment layer 206; the deflection angle of the liquid crystal molecules adjacent to the fourth substrate 202 is the same as the alignment direction Y of the second alignment layer 207; therefore, when the first electrode 204 and the second electrode 205 are not energized, the liquid crystal molecules in the second liquid crystal layer 203 are twisted at 90 ° in the vertical direction of the third substrate 201 to the fourth substrate 202.

That is, the liquid crystal molecules in the second liquid crystal layer 203 are twisted along the third substrate 201 to the fourth substrate 202.

Furthermore, a first polarizer 300 is disposed on a side of the third substrate 201 away from the fourth substrate 202 to change polarized light entering the second liquid crystal layer 203; the second polarizer 400 is disposed on a side of the fourth substrate 202 away from the third substrate 201 for selectively transmitting light.

Here, the second polarizer 400 and the first polarizer 300 each have an absorption axis 500 and a transmission axis 600, it is understood that the absorption axis 500 is a direction in which light does not transmit, the transmission axis 600 is a direction in which light can transmit, and an axial direction a of the absorption axis 500 and an axial direction B of the transmission axis 600 are perpendicular to each other.

Illustratively, the first polarizer 300 is a lower polarizer, and the second polarizer 400 is an upper polarizer; and, the axial direction B of the transmission axis 600 in the first polarizer 300 and the axial direction B of the transmission axis 600 in the second polarizer 400 are parallel to each other. Thus, the polarization directions of light passing through the first polarizer 300 and the second polarizer 400 may be the same, and light may pass through the second polarizer 400 without loss at a wide viewing angle, thereby improving a display effect.

Next, the alignment direction X of the first alignment layer 206 corresponding to the third substrate 201 is 30 ° to 60 °, for example, 30 °,40 °, 45 °, 50 °, 55 °, or 60 °, and the alignment direction Y of the second alignment layer 207 corresponding to the fourth substrate 202 is 120 ° to 150 °, for example, 120 °, 125 °, 130 °, 135 °, 140 °, or 150 °.

It should be understood that the alignment direction X of the first alignment layer 206 is an angle between the alignment direction X and the transmission axis 600 of the first polarizer 300; the alignment direction Y of the second alignment layer 207 is an angle between the alignment direction Y and the transmission axis 600 of the second polarizer 400. In addition, the arrangement angle of the liquid crystal molecules near the third substrate 201 is the same as the alignment direction of the first alignment layer 206, i.e., corresponds to 30 ° -60 °; similarly, the liquid crystal molecules near the fourth substrate 202 are aligned at the same angle as the alignment direction of the second alignment layer 207, i.e., at 120 ° -150 °, and are twisted at 90 ° between the third substrate 201 and the fourth substrate 202. Thus, the arrangement of the liquid crystal molecules is more regular, and more liquid crystal molecules can be arranged, thereby improving the refraction of the liquid crystal molecules and the display effect of the display panel 10.

Illustratively, as shown in fig. 4 and 6, the alignment direction X of the first alignment layer 206 corresponding to the third substrate 201 is 45 °, and the alignment direction Y of the second alignment layer 207 corresponding to the fourth substrate 202 is 135 °. Thus, the liquid crystal molecules of the third substrate 201 and the fourth substrate 202 are arranged more neatly, and the refraction effect on light is better.

It is understood that, as shown in fig. 6 and 7, the alignment direction X of the first alignment layer 206 is 45 °, the alignment direction of the liquid crystal molecules adjacent to the first alignment layer 206 is also 45 °, and the angle formed between the alignment direction X and the transmission axis 600 of the first polarizer 300 is 45 °; similarly, the alignment direction Y of the second alignment layer 207 is 135 °, the alignment direction of the liquid crystal molecules close to the second alignment layer 207 is 135 °, and the angle formed between the alignment direction Y and the transmission axis 600 of the second polarizer 400 is 135 °. Thus, the components of light passing through the transmission axis 600 and the absorption axis 500 of the second polarizer 400 may be the same, and the amounts of light absorbed and transmitted by the second polarizer 400 may be the same, thereby ensuring a display effect.

It should be noted that when the first electrode 204 on the third substrate 201 and the second electrode 205 on the fourth substrate 202 are not energized, the liquid crystal molecules between the third substrate 201 and the fourth substrate 202 are twisted and aligned in the vertical direction, and light enters the second liquid crystal layer 203 from the first polarizer 300 and is deflected by 45 ° along the twisted liquid crystal molecules, and then exits in the same alignment direction Y as the second alignment layer 207, that is, 135 °, as shown in fig. 4; meanwhile, since the axial direction B of the transmission axis 600 of the second polarizer 400 is the same as the axial direction B of the transmission axis 600 of the first polarizer 300, the components of light in the transmission axis 600 and the absorption axis 500 of the second polarizer 400 are the same, and the amount of light transmitted through the absorption axis 500 and the transmission axis 600 is the same, as shown in fig. 4.

Different voltages are gradually applied to the first electrode 204 and the second electrode 205, so that a voltage difference is formed between the first electrode 204 and the second electrode 205, and liquid crystal molecules in the second liquid crystal molecule layer 203 are controlled to gradually deflect towards the fourth substrate 202, so that a single-sided peep-proof viewing angle is formed.

It should be noted that when different voltages are applied to the first electrode 204 and the second electrode 205, the liquid crystal molecules close to the first alignment layer 206 and the second alignment layer 207 maintain the alignment direction with the corresponding alignment layers, i.e. they are not deflected by the different voltages, as shown in fig. 6; illustratively, the liquid crystal molecules close to the first alignment layer 206 are aligned in the same direction X as the first alignment layer 206, at 45 °; the liquid crystal molecules close to the second alignment layer 207 have the same alignment direction Y as the second alignment layer 207, which is 135 °.

The process of gradually lying to standing of the liquid crystal molecules in the second liquid crystal molecule layer 203 at the single-sided peep-proof viewing angle; in this process, the optical rotation of the liquid crystal molecules in the second liquid crystal layer 203 gradually weakens, so that the included angle between the light vibration direction L and the transmission axis 600 of the second polarizer 400 gradually decreases, as shown in fig. 5. That is, the light vibration direction L forms an angle of less than 45 ° with the axial direction B of the light transmission axis 600 of the second polarizer 400, for example, 40 °, 35 ° or 30 °, so that the component of light at the light transmission axis 600 gradually increases and the component of the absorption axis 500 gradually decreases, that is, the light transmitted through the second polarizer 400 increases.

It is understood that a single-sided privacy view has a privacy side 700 and a normal display side 800, the normal display side 800 is normally displayed, and the visibility of the privacy side 700 is limited, as shown in fig. 8.

In the one-sided peep-proof viewing angle, an included angle between the light vibration direction L and the axial direction B of the light transmission axis 600 of the second polarizer 400 is gradually reduced, so that the component of the light transmission axis 600 is gradually increased; and after the liquid crystal molecules are deflected to stand towards the fourth substrate 202, the birefringence of the privacy side 700 is larger than that of the normal display side 800, so that the light output of the privacy side 700 is less than that of the normal display side 800, thereby forming a single-sided privacy viewing angle.

It is worth mentioning that referring to fig. 8, the birefringence of the privacy side 700 and the normal display side 800 is shown; where Δ n =0 in fig. 9 represents a birefringence of 0, the birefringence of the privacy side 700 is greater than that of the normal display side 800.

Gradually increasing the voltage of the first electrode 204 and the second electrode 205 from the voltage difference corresponding to the single-side peep-proof viewing angle, so that the voltage difference between the first electrode 204 and the second electrode 205 reaches the maximum, and the liquid crystal molecules between the third substrate 201 and the fourth substrate 202 gradually stand until the long axes of the liquid crystal molecules are perpendicular to the third substrate 201 and the fourth substrate 202, thereby forming a wide viewing angle; at this time, since the optical rotation of the liquid crystal molecules disappears due to the liquid crystal molecules standing completely, the amount of light emitted from the privacy side 700 is the same as that from the normal display side 800, that is, the privacy side 700 is normally displayed, as shown in fig. 9.

For example, please refer to fig. 1 and fig. 10A to 10D, wherein fig. 10A to 10C respectively show the transmittance distribution diagrams in three different single-side narrow viewing angle modes, and fig. 10D shows the transmittance distribution diagram in the wide viewing angle mode. As shown in fig. 10D, when the voltage difference between the first electrode 204 and the second electrode 205 is larger, the light-emitting viewing angle range is larger, that is, the voltage difference corresponding to the single-side peep-proof viewing angle is smaller than the voltage difference corresponding to the wide viewing angle.

Referring to fig. 11, a curve D1, a curve D2, a curve D3, and a curve D4 respectively show the transmittance distribution at each viewing angle when the first electrode 204 and the second electrode 205 are viewed along different angles when different voltages are applied; where 0 ° in the figure represents the angle viewed from the front, the positive horizontal polar angle represents the angle viewed from the right or normal display side 800, and the negative horizontal polar angle represents the angle viewed from the left or privacy side 700.

Wherein, the curve D1 is a transmittance distribution curve corresponding to each angle at a wide viewing angle; the curve D2, the curve D3 and the curve D4 are respectively penetration rate distribution curves corresponding to three different single-side peep-proof narrow viewing angles.

It is understood that the viewing angle corresponding to the peak of the luminance distribution curve varies with the voltage difference between the first electrode 204 and the second electrode 205. For example, the angle of the peak corresponding to the wide view angle distribution curve is 0 °, that is, the transmitted light quantity is the most and the display effect is the best when the viewer looks upright; the angles corresponding to the wave crests of the curves D2, D3 and D4 are on the right side of the wide viewing angle, namely the light quantity transmitted from the left side to the right side is gradually increased, and the left side can play a role in unilateral peeping prevention at a certain angle.

In addition, the transmittance of the curve D2, the curve D3 and the curve D4 is different when viewed at the same angle, that is, the voltage difference of the curve D2, the curve D3 and the curve D4 is different, for example, the voltage difference of the curve D2, the curve D3 and the curve D4 gradually decreases. That is, the viewing angle control can be performed by controlling the voltage difference between the first electrode 204 and the second electrode 205.

Example two

The second embodiment provides a display device 1, which includes a backlight module 20 and the display panel 10 of the first embodiment, wherein the backlight module 20 is disposed on a side of the display box 100 away from the viewing angle control box 200, and provides a backlight source for the display box 100 and the viewing angle control box 200.

It should be noted that, when the display device 1 is applied to the vehicle-mounted display, the driver is required to avoid watching the display screen at the position as much as possible, and the other positions can watch the display screen normally. Therefore, by adjusting the voltage difference between the first electrode 204 and the second electrode 205 in the viewing angle control box 200, switching between the single-sided peep-proof mode and the wide viewing angle mode can be achieved; in addition, under the unilateral peep-proof mode, the visual angle can be controlled according to different adjusted voltage sizes and drivers with different heights.

In the description herein, references to the description of the terms "some embodiments," "exemplary," etc. mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or exemplary is included in at least one embodiment or exemplary of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present application have been shown and described, it is understood that the above embodiments are illustrative and should not be construed as limiting the present application and that various changes, modifications, substitutions and alterations can be made therein by those skilled in the art within the scope of the present application, and therefore all changes and modifications that come within the meaning of the claims and the description of the invention are to be embraced therein.

Claims

1. A display panel comprises a display box, wherein the display box comprises a first substrate, a second substrate and a first liquid crystal molecular layer, the second substrate is arranged opposite to the first substrate in a box-to-box mode, and the first liquid crystal molecular layer is arranged between the first substrate and the second substrate; characterized in that, the display panel still includes:

2. The display panel according to claim 1, wherein a first polarizer is disposed on a side of the third substrate away from the fourth substrate, and a side of the first polarizer away from the third substrate is attached to the second substrate; a second polaroid is arranged on one side of the fourth substrate, which is far away from the third substrate, and absorption axes and transmission axes of the second polaroid and the first polaroid are parallel to each other;

3. The display panel according to claim 2, wherein the alignment direction of the first alignment layer is 30 ° to 60 ° and the alignment direction of the second alignment layer is 120 ° to 150 °.

4. The display panel according to claim 3, wherein the alignment direction of the first alignment layer is 45 ° and the alignment direction of the second alignment layer is 135 °.

5. The display panel of claim 1, wherein the single-sided privacy viewing angle has a smaller voltage difference than the wide viewing angle.

6. The display panel of claim 5, wherein the optical activity of the liquid crystal molecules in the second liquid crystal molecule layer gradually decreases when the single-sided privacy viewing angle is switched to the wide viewing angle.

7. The display panel according to claim 5 or 6, wherein at the one-sided peep-proof viewing angle, the one-sided peep-proof viewing angle has a peep-proof side and a normal display side, the birefringence of the liquid crystal molecules at the peep-proof side is greater than the birefringence of the liquid crystal molecules at the normal display side, and the light output amount at the peep-proof side is smaller than the light output amount at the normal display side.

8. The display panel according to claim 5 or 6, wherein the long axes of the liquid crystal molecules of the second liquid crystal layer are perpendicular to the third substrate and the fourth substrate at the wide viewing angle.

9. The display panel of claim 1, wherein the display cell is an IPS mode liquid crystal display cell.

10. A display device, comprising a backlight module and the display panel of any one of claims 1 to 9, wherein the backlight module is disposed on a side of the display box away from the viewing angle control box.