CN219891508U - Display device - Google Patents

Abstract

The utility model relates to the technical field of display, and an embodiment of the utility model discloses a display device. The display device includes a self-luminous display panel for displaying a picture; further comprises: at least two dimming boxes which are arranged on the light emitting side of the self-luminous display panel in a stacking manner are used for controlling the visual angle of the display device; the dimming box comprises a first substrate far away from the self-luminous display panel, a second substrate close to the self-luminous display panel and a liquid crystal layer positioned between the first substrate and the second substrate; the first substrate is provided with a first transparent electrode, and the second substrate is provided with a second transparent electrode matched with the first transparent electrode; the alignment directions of the liquid crystal layers in the at least two dimming boxes are consistent. The display device disclosed by the embodiment of the utility model not only can realize the adjustment of the visual angle; the picture quality can be further improved.

Description

Display device

Technical Field

The utility model relates to the technical field of display, in particular to a display device.

Background

With the development of display technology, the application of display devices is also becoming wider, and the corresponding requirements for the display devices are also becoming higher. An OLED (Organic Light-Emitting Diode) display is a next-generation display after an LCD (liquid crystal display), and has advantages of good image quality, small size, light weight, low driving voltage, low power consumption, no radiation, and relatively low manufacturing cost, and its development and application are more widespread.

The visual angle of the existing OLED display is generally not adjustable, and information leakage and other problems are easily caused by the fact that the visual angle is large in use. At present, a shutter shielding film is attached to an OLED display to realize wide and narrow viewing angles, when peeping prevention is needed, a screen is shielded by the shutter shielding film, so that the viewing angles can be reduced, but the shutter shielding film is additionally prepared in the mode, great inconvenience is caused to a user, one shutter shielding film can only realize one viewing angle, once the shutter shielding film is attached, the viewing angle is fixed in a narrow viewing angle mode, free switching between the wide viewing angle mode and the narrow viewing angle mode is not realized, and brightness reduction influence grade is caused by the adoption of the shutter shielding film, so that the image quality of the OLED display is influenced.

Disclosure of Invention

The utility model provides a display device, which solves the problems of non-adjustable visual angle and poor picture quality of the display device.

According to an aspect of the present utility model, there is provided a display device including a self-luminous display panel for displaying a picture, the display device including:

at least two dimming boxes which are arranged on the light emitting side of the self-luminous display panel in a stacking manner are used for controlling the visual angle of the display device;

the dimming box comprises a first substrate far away from the self-luminous display panel, a second substrate close to the self-luminous display panel and a liquid crystal layer positioned between the first substrate and the second substrate; the first substrate is provided with a first transparent electrode, and the second substrate is provided with a second transparent electrode matched with the first transparent electrode;

the alignment directions of the liquid crystal layers in at least two dimming boxes are consistent.

Optionally, the at least two dimming boxes include a first dimming box near the self-luminous display panel and a second dimming box far from the self-luminous display panel.

The display device further comprises a first polarized light functional film layer, wherein the first polarized light functional film layer is arranged on one side, close to the self-luminous display panel, of the second substrate of the first light regulating box.

The display device further comprises a second polarized light functional film layer, and the second polarized light functional film layer is arranged on one side, far away from the self-luminous display panel, of the first substrate of the second light regulating box.

Optionally, the first polarization functional film layer is parallel to the light transmission axis of the second polarization functional film layer.

Optionally, the display device further includes a light reflecting functional layer, where the light reflecting functional layer is used to reflect external ambient light;

the light reflecting functional layer is arranged between the self-luminous display panel and the second polarized light functional film layer; or the light reflecting functional layer is arranged between the first dimming box and the second dimming box.

Optionally, the light reflecting functional layer is a metal coating layer or an optical film with a reflecting function.

Optionally, the display device further includes a third polarizing functional film layer, where the third polarizing functional film layer is disposed between the light reflecting functional layer and the first light modulation box.

Optionally, the first polarizing functional film layer is a reflective film with a polarizing function.

Optionally, the first substrate is glass or polyimide.

Optionally, the edge of the first substrate of at least one of the dimming boxes is further provided with a black matrix.

Optionally, an alignment mark is further provided on an edge of the first substrate of at least one of the dimming boxes.

According to the technical scheme provided by the embodiment of the utility model, the disclosed display device not only can realize the rapid switching of the wide-view angle mode and the narrow-view angle mode by arranging at least two dimming boxes on the light emitting side of the self-luminous display panel; the viewing angle can be further narrowed in a narrow viewing angle mode, so that the effect of high-quality pictures is achieved; and by arranging at least two dimming boxes in which the alignment directions of the liquid crystal layers are the same, the cost can be reduced and the control process can be simplified.

It should be understood that the description in this section is not intended to identify key or critical features of the embodiments of the utility model or to delineate the scope of the utility model. Other features of the present utility model will become apparent from the description that follows.

Drawings

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

Fig. 1 is a schematic structural diagram of a display device according to an embodiment of the present utility model in a wide viewing angle;

fig. 2 is a schematic structural diagram of a display device according to an embodiment of the present utility model at a narrow viewing angle;

fig. 3 is a schematic structural diagram of another display device according to an embodiment of the present utility model;

fig. 4 is a schematic structural diagram of another display device according to an embodiment of the present utility model;

fig. 5 is a schematic structural diagram of another display device according to an embodiment of the present utility model;

fig. 6 is a schematic structural diagram of another display device according to an embodiment of the present utility model;

fig. 7 is a schematic structural diagram of another display device according to an embodiment of the utility model.

Detailed Description

In order that those skilled in the art will better understand the present utility model, a technical solution in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model.

It should be noted that the terms "first," "second," and the like in the description and the claims of the present utility model and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the utility model described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Fig. 1 is a schematic structural diagram of a display device according to an embodiment of the present utility model in a wide viewing angle, and fig. 2 is a schematic structural diagram of the display device according to an embodiment of the present utility model in a narrow viewing angle. Referring to fig. 1 and 2, the display device provided in this embodiment includes: a self-luminous display panel 1, the self-luminous display panel 1 being for displaying a picture; further comprises: at least two dimming cartridges (the present embodiment exemplarily includes two dimming cartridges of the first dimming cartridge 2 and the second dimming cartridge 3) provided in a stacked manner on the light emitting side of the self-luminous display panel 1; the dimming box is used for controlling the visual angle of the display device; the dimming box comprises a first substrate far away from the self-luminous display panel 1, a second substrate close to the self-luminous display panel and a liquid crystal layer positioned between the first substrate and the second substrate, wherein a first transparent electrode is arranged on the first substrate, and a second transparent electrode matched with the first transparent electrode is arranged on the second substrate; the alignment directions of the liquid crystal layers in at least two dimming boxes are consistent. The initial alignment of the liquid crystal molecules in the liquid crystal layer of the dimming cell near the second substrate is parallel or antiparallel to the initial alignment of the liquid crystal molecules near the first substrate.

Specifically, the self-luminous display panel 1 may be an OLED (Organic Light Emitting Diode ) display panel, which may include the substrate 11 in particular; an anode layer 12, a light-emitting functional layer 13, and a cathode layer 14, which are stacked on a substrate 11; the light emitting functional layer 13 may include a hole injection layer, a hole transport layer, an electron blocking layer, a light emitting layer, a hole blocking layer, an electron transport layer, and an electron injection layer. The light emitting layer may be specifically classified into a red light emitting layer that excites red light, a blue light emitting layer that excites blue light, a green light emitting layer that excites green light, and the like. The viewing angle of light emitted from the self-luminous display panel 1 is generally large, and the peep preventing effect is poor. Of course, in other embodiments, the self-luminous display panel may also be a Micro-LED display panel or a QLED display panel, or the like.

In this embodiment, at least two dimming boxes are disposed on the light emitting side of the self-luminous display panel, and the at least two dimming boxes include only the first dimming box 2 and the second dimming box 3. The first dimming box 2 comprises a first substrate 23, a first second substrate 21 and a first liquid crystal layer 22; the second dimming cell 3 includes a second first substrate 33, a second substrate 31 and a second liquid crystal layer 32. The alignment directions of the first liquid crystal layer 22 in the first light modulation cell 2 and the second liquid crystal layer 32 of the second light modulation cell 3 are identical, meaning that in each light modulation cell, the initial alignment of the liquid crystal molecules of the liquid crystal layer near the first substrate is the same, and the initial alignment of the liquid crystal molecules of the liquid crystal layer near the second substrate is also the same. Illustratively, the initial alignment of the liquid crystal molecules near the first substrate may be 90 degrees. The initial alignment of the liquid crystal molecules near the second substrate is parallel or antiparallel to the initial alignment of the liquid crystal molecules near the first substrate, for example, 90 degrees or 270 degrees.

In other embodiments, more than two dimming boxes may be disposed on the light emitting side of the self-luminous display panel, and the alignment directions of the liquid crystal layers of all the dimming boxes disposed on the light emitting side of the self-luminous display panel are identical, and other structural arrangements are described in the following embodiments, which are not repeated herein.

As shown in fig. 1, in the initial state, the liquid crystal molecules in the first dimming box 2 and the second dimming box 3 are kept in a state similar to lying, at this time, the light emitted from the self-luminous display panel 1 along each angle can pass through the dimming boxes, and the first dimming box 2 and the second dimming box 3 are in a wide viewing angle mode, so that the display device is also in the wide viewing angle mode. As shown in fig. 2, when the display device requires a narrow viewing angle, the liquid crystal molecules are tilted toward the direction of the electric field lines, that is, the liquid crystal molecules are changed from a flat state to a tilted state, by simultaneously applying voltages to the first transparent electrodes (not shown) and the second transparent electrodes (not shown) of the first and second light regulating boxes 2 and 3. Under the inclined state, the liquid crystal molecules have a light receiving effect, and emergent light with a large viewing angle is received in a direction of a narrow viewing angle, so that the function of the narrow viewing angle is realized, and at the moment, the first dimming box 2 and the second dimming box 3 are both in a narrow viewing angle mode, so that the display device is also in the narrow viewing angle mode. In addition, the display device in this embodiment includes at least two dimming boxes, and after the light emitted from the first dimming box close to the self-luminous display panel passes through the next second dimming box, the viewing angle is further narrowed, so as to achieve a better peeping prevention effect. In addition, the alignment directions of the liquid crystal layers in the first dimming box 2 and the second dimming box 3 are the same, so that the manufacturing cost can be reduced on one hand; on the other hand, when the visual angle of each dimming box needs to be adjusted, the same electric field is only required to be applied to each dimming box, so that the inclination angles of liquid crystal molecules are the same, the light receiving directions of different dimming boxes are the same, and the function of further narrowing the visual angle can be guaranteed by using a simple control mode.

According to the technical scheme of the embodiment, the adopted display device comprises a self-luminous display panel; at least two dimming boxes which are arranged on the light emitting side of the self-luminous display panel in a stacking manner are used for controlling the visual angle of the display device; the dimming box comprises a first substrate far away from the self-luminous display panel, a second substrate close to the self-luminous display panel and a liquid crystal layer positioned between the first substrate and the second substrate; the first substrate is provided with a first transparent electrode, and the second substrate is provided with a second transparent electrode matched with the first transparent electrode; the alignment directions of the liquid crystal layers in at least two dimming boxes are consistent. By arranging at least two dimming boxes on the light emitting side of the self-luminous display panel, not only can the wide-view angle mode and the narrow-view angle mode be quickly switched; the viewing angle can be further narrowed in a narrow viewing angle mode, so that the effect of high-quality pictures is achieved; and the alignment directions of the liquid crystal layers in the dimming boxes are the same, so that the cost can be reduced, and the control process is simplified.

The first substrate 23 and the second substrate 21 of the first light modulation cassette 2 and the first substrate 33 and the second substrate 31 of the second light modulation cassette 3 are transparent substrates. In other embodiments, multiple viewing angle modes may be set, where the number of dimming boxes in the narrow viewing angle mode is different in the different viewing angle modes, that is, the number of dimming boxes to which a large electric field is applied is different.

In this embodiment, the display device may further include a viewing angle adjustment control module, where the viewing angle adjustment control module receives instruction information sent by a user, and controls the number of dimming boxes in a narrow viewing angle mode in the display device, so as to implement adjustment of multiple viewing angles. If the requirement of the peep-proof function is not high, only one dimming box can be controlled to be in a narrow viewing angle mode, so that the power consumption can be reduced; when the requirement on the peeping prevention effect is high, all the dimming boxes can be controlled to be in a narrow viewing angle mode, so that the optimal peeping prevention effect is achieved. It will be appreciated that the application of an electric field to the dimming cell described in this embodiment means that the voltage difference between the first substrate and the second substrate is greater than a predetermined threshold, for example, the voltage between the first substrate and the second substrate is greater than 0V, which may be typically 1V to 3V, so that the liquid crystal molecules can be tilted. No electric field is applied to the dimming cartridge, indicating that the voltage difference between the first substrate and the second substrate is equal to 0V. In other embodiments, an initial electric field may be applied to the light modulation cell in the wide viewing angle mode, so that the liquid crystal molecules are deflected by a small angle, for example, a deflection angle is greater than 1 degree and less than 7 degrees, so that the liquid crystal molecules can be rapidly tilted to the angle of the narrow viewing angle mode when the light modulation cell is switched from the wide viewing angle mode to the narrow viewing angle mode. I.e. the response speed can be increased.

In addition, the liquid crystal molecules may be positive liquid crystal molecules or negative liquid crystal molecules; the liquid crystal phase retardation is preferably 800nm, optionally in the range of 700nm to 1200nm. The present embodiment is not particularly limited thereto. The first dimming box 2 and the second dimming box 3 can be attached through OCA, and frame attachment can be performed by using the chewing gum.

In this embodiment, spacers (not shown in the figure) for supporting are disposed on the first substrate 23 of the first light modulation box 2 and the first substrate 33 of the second light modulation box 3, and the spacers may be Photo Spacers (PS) which may be made of a photoreactive material (for example, photoresist material) for controlling the thickness and uniformity between the first substrate 23 of the first light modulation box 2 and the corresponding second substrate 21 and between the first substrate 33 of the second light modulation box 3 and the corresponding second substrate 31.

Optionally, fig. 3 is a schematic structural diagram of still another display device according to an embodiment of the present utility model, and referring to fig. 3, at least two dimming boxes include a first dimming box near the self-luminous display panel 1; the display device further comprises a first polarization functional film layer 4, wherein the first polarization functional film layer 4 is arranged on one side of the second polar plate 21 of the first dimming box 2, which is close to the self-luminous display panel.

Specifically, the light emitted from the light-emitting display panel 1 is circularly polarized light. If the first polarizing functional film layer 4 is not provided, when the circularly polarized light passes through the light adjusting box, the light vibrating along each direction passes through the light adjusting box, and at this time, the light passing through the light adjusting box still has more large visual angle components. By providing the first polarization function film layer 4, the first polarization function film layer 4 can transmit only polarized light in a specific direction, such as only linearly polarized light. Therefore, only linearly polarized light can enter the dimming box, and after the light receiving effect of the dimming box, most of large-view-angle components of emergent light are absorbed by the first polarization functional film layer 4, namely, the large-view-angle components of the emergent light are fewer, so that the peeping prevention capability under a narrow view angle is further improved. The first polarizing functional film layer 4 may be a polarizer, for example.

Optionally, with continued reference to fig. 3, at least two dimming boxes comprise a second dimming box 3 remote from the self-luminous display panel 1; the display device also comprises a second polarized light functional film layer 5; the second polarization function layer 5 is disposed on a side of the first substrate 33 of the second light modulation box 3 away from the self-luminous display panel 1.

Specifically, by providing the second polarization function layer 5, only light having a specific polarization state can be emitted to the outside of the display device. The large visual angle component of the emergent light in the narrow visual angle mode is further reduced, so that the peeping prevention effect in the narrow visual angle mode is further improved. The second polarizing functional film layer 5 may be a polarizer, for example.

Preferably, the light transmission axes of the first polarizing functional film layer 4 and the second polarizing functional film layer 5 are parallel. So arranged, in the wide viewing angle mode, that is, when no electric field is applied by the light regulating box, the outgoing light from the self-luminous display panel 1 can penetrate the first polarizing functional film layer 4 and the second polarizing functional film layer 5 to be outgoing to the outside of the display device. The power consumption of the display device in the wide viewing angle mode can be reduced.

Optionally, with continued reference to fig. 3, the display device further includes a light reflecting functional layer 6, where the light reflecting functional layer 6 is configured to reflect external ambient light, and the light reflecting functional layer 6 is disposed between the self-luminous display panel 1 and the second polarizing functional film layer 5.

Specifically, the light reflecting functional layer 6 is capable of reflecting the outside ambient light into the outside environment. In the narrow viewing angle mode, stronger environment reflected light is observed from a large viewing angle, so that the light emitted from the large viewing angle by the self-luminous display panel perceived by human eyes is weaker, and the peeping prevention effect in the narrow viewing angle mode can be further improved. The light reflecting functional layer 6 may be disposed at any position between the second polarizing functional layer 5 and the self-luminous display panel 1, specifically may be disposed between the second polarizing functional layer 5 and the second dimming box 3, may be disposed between two dimming boxes, may be disposed between the first dimming box 2 and the first polarizing functional layer 4, and may be disposed between the self-luminous display panel 1 and the first polarizing functional layer 4. The light reflecting functional layer 6 may be formed by plating, and the plating material may be titanium oxide, niobium oxide, silicon oxide, or the like. The film may be formed on any one of the upper and lower film layers at this position, and for example, if the light reflecting functional layer 6 is provided between the second light adjusting case 3 and the second polarizing functional film layer 5, the light reflecting functional layer 6 may be formed by coating a film on the second polarizing functional film layer 5 or by coating a film on the first substrate 33 of the second light adjusting case 3. Of course, the light reflecting functional layer 6 may have a laminated structure of a plurality of coating films.

Preferably, when the display device includes only the first dimming box 2 and the second dimming box 3, the light reflecting functional layer 6 is disposed between the first dimming box 2 and the second dimming box 3.

Specifically, the self-luminous display panel includes only two dimming boxes, and at this time, a good light receiving effect can be achieved in a narrow viewing angle mode. Meanwhile, the whole thickness of the display device is not too large, and the display device is light and thin. Meanwhile, the light reflecting functional layer 6 is arranged between the two dimming boxes, so that the intensity of reflected light can be reduced, and the influence of the excessive intensity of the reflected light on the overall display effect of the display device is avoided. Further, the light reflecting functional layer 6 may be an optical film having a reflecting function, for example, an APF (Advanced Polarizer Film, multilayer reflective polarizer) film, which is not limited thereto.

Optionally, fig. 4 is a schematic structural diagram of another display device according to an embodiment of the present utility model, and referring to fig. 4, the display device further includes a third polarizing functional film layer 7, where the third polarizing functional film layer 7 is disposed between the light reflecting functional layer 6 and the first light adjusting box 2.

Specifically, the third polarization function film layer 7 has a polarization function, and only light of a specific polarization state can pass through the third polarization function film layer 7. By arranging the third polarization function film layer 7, the component of the large visual angle of the emergent light of the display device can be further reduced, and thus the peeping prevention effect in the narrow visual angle mode can be further improved. The penetration axis of the third polarization function film layer 7 is parallel to the penetration axis of the first polarization function film 4, so that the emergent light from the self-luminous display panel 1 can penetrate the first polarization function film layer 4 and the third polarization function film layer 7 to be emitted to the outside of the display device in a wide viewing angle mode, that is, when the light regulating box does not apply an electric field. The power consumption of the display device in the wide viewing angle mode can be reduced.

Alternatively, fig. 5 is a schematic structural diagram of another display device according to an embodiment of the present utility model, and referring to fig. 5, the first polarizing functional film layer is a reflective film 41 with a polarizing function. The reflective film with the polarization function has the polarization function and the reflection function, so that a reflective function layer is not required to be additionally arranged between the self-luminous display panel and the second polarization function film layer 5, the integration level of the display device can be improved, and the thickness of the display device can be reduced.

Optionally, fig. 6 is a schematic structural diagram of still another display device according to an embodiment of the present utility model, and referring to fig. 6, in this embodiment, a black matrix 71 is disposed at an edge of a first substrate of at least one light modulation box, where the black matrix is used to prevent a light leakage phenomenon at an edge of the display device. In some preferred embodiments, alignment marks 81 may be provided at the black matrix position 71 to facilitate alignment of the dimming box. As shown in fig. 6, it is preferable to provide a black matrix on the first substrate of the light modulation cassette farthest from the self-luminous display panel 1, and for example, it is possible to provide a black matrix 71 on only the first substrate 33 of the second light modulation cassette 3 and provide alignment marks 81 on both the edge position of the first substrate 33 of the second light modulation cassette 3 and the edge position of the first substrate 23 of the first light modulation cassette 2. Note that, the alignment mark 81 is a mark coated on the substrate, and only the position corresponding to the first substrate is shown in fig. 6.

In other embodiments, as shown in fig. 7, fig. 7 is a schematic structural diagram of another display device provided in the embodiment of the present utility model, where the first substrate 33 of the second dimming box 3 and the first substrate 23 of the first dimming box 2 are both provided with a black matrix 71, and may be further provided with alignment marks.

As shown in fig. 6, the first substrate 33 of the second dimming box 3 or the first substrate 23 of the first dimming box 2 may be glass or polyimide PI material; when the first substrate is PI material, it is preferable to be PI material resistant to high temperature of 300 degrees celsius or above, and the second substrate may be glass or PI material resistant to high temperature; of course, the material of the first substrate may be other materials that can be used as the substrate. The first substrate is provided with a first transparent electrode which is arranged in a whole layer, and the first transparent electrode can be ITO, for example. The second substrate is provided with an insulating layer 72 and a second transparent electrode in the form of a block, which may also be ITO. The second transparent electrode is arranged corresponding to the display area of the display device. The second substrate is also provided with a metal electrode which is arranged in the non-display area and has smaller impedance and is used for transmitting an external signal to the second transparent electrode. The voltage (namely, the pressure difference between the first transparent electrode and the second transparent electrode) applied to the dimming box is preferably alternating current, so that the liquid crystal is ensured to be in a stable state and is simultaneously beneficial to the rapid switching of the liquid crystal between display modes, and the switching between the wide-view angle display mode and the narrow-view angle display mode is further shortened; in the wide viewing angle mode, the differential pressure amplitude is between 0.1V and 0.5V, and in the narrow viewing angle mode, the differential pressure amplitude is between 1V and 3V. The refresh frequency of the alternating voltage is 60Hz to 150Hz. In addition, the first substrate may further be provided with a support column for supporting the first substrate and the corresponding second substrate. The first substrate and the corresponding second substrate are required to be connected, and the ITO electrode can be arranged at the position where the gold Ball is dotted in a gold Ball (Au Ball) dotted mode.

It should be appreciated that various forms of the flows shown above may be used to reorder, add, or delete steps. For example, the steps described in the present utility model may be performed in parallel, sequentially, or in a different order, so long as the desired results of the technical solution of the present utility model are achieved, and the present utility model is not limited herein.

The above embodiments do not limit the scope of the present utility model. It will be apparent to those skilled in the art that various modifications, combinations, sub-combinations and alternatives are possible, depending on design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included in the scope of the present utility model.

Claims (10)

1. A display device including a self-luminous display panel for displaying a screen, characterized in that the display device further comprises:

at least two dimming boxes which are arranged on the light emitting side of the self-luminous display panel in a stacking manner are used for controlling the visual angle of the display device; the dimming box comprises a first substrate far away from the self-luminous display panel, a second substrate close to the self-luminous display panel and a liquid crystal layer positioned between the first substrate and the second substrate; the first substrate is provided with a first transparent electrode, and the second substrate is provided with a second transparent electrode matched with the first transparent electrode;

the alignment directions of the liquid crystal layers in at least two dimming boxes are consistent.

2. The display device according to claim 1, wherein an initial alignment of liquid crystal molecules in the liquid crystal layer of the light adjustment cell near the second substrate is parallel or antiparallel to an initial alignment of liquid crystal molecules near the first substrate.

3. The display device according to claim 1, wherein at least two of the dimming boxes include a first dimming box near the self-luminous display panel and a second dimming box far from the self-luminous display panel.

4. The display device according to claim 3, further comprising a first polarization functional film layer and a second polarization functional film layer, wherein the first polarization functional film layer is disposed on a side of the second substrate of the first light modulation box close to the self-luminous display panel; the second polarization function film layer is arranged on one side of the first substrate of the second light regulating box, which is far away from the self-luminous display panel; the first polarized light functional film layer is parallel to the light transmission axis of the second polarized light functional film layer.

5. The display device according to claim 4, further comprising a light reflecting functional layer for reflecting external ambient light;

the light reflecting functional layer is arranged between the self-luminous display panel and the second polarized light functional film layer; or the light reflecting functional layer is arranged between the first dimming box and the second dimming box.

6. The display device according to claim 5, wherein the light reflecting functional layer is a metal plating layer or an optical film having a reflecting function.

7. The display device of claim 5, further comprising a third polarizing functional film layer disposed between the light reflecting functional layer and the first dimming box.

8. The display device according to claim 4, wherein the first polarizing functional film layer is a reflective film having a polarizing function.

9. The display device according to claim 1, wherein an edge of the first substrate of at least one of the light modulation boxes is further provided with a black matrix.

10. The display device of claim 1, wherein an edge of the first substrate of at least one of the dimming boxes is further provided with an alignment mark.