CN220357398U - Display panel with switchable wide and narrow viewing angles and display device - Google Patents

Abstract

The utility model discloses a display panel with a switchable wide and narrow viewing angle and a display device, wherein the display panel comprises a first dimming box, a display liquid crystal box, a brightness enhancement film and a second dimming box which are sequentially stacked; the first dimming box comprises a first substrate, a second substrate and a first liquid crystal layer, wherein a first auxiliary electrode is arranged on the first substrate, and a first visual angle control electrode is arranged on the second substrate; the second dimming box comprises a third substrate, a fourth substrate and a second liquid crystal layer, wherein a second auxiliary electrode is arranged on the third substrate, and a second visual angle control electrode is arranged on the fourth substrate; in the wide view angle mode, the first dimming box and the second dimming box are in a wide view angle state; in the narrow viewing angle mode, the first dimming box and the second dimming box are both in a narrow viewing angle state in the same direction. The first dimming box and the second dimming box are respectively arranged on two sides of the display liquid crystal box and are matched with the brightness enhancement film to be used together, so that the brightness of a large visual angle under a wide visual angle can be improved, and the effect of a narrow visual angle can be prevented from being influenced.

Description

Display panel with switchable wide and narrow viewing angles and display device

Technical Field

The utility model relates to the technical field of displays, in particular to a display panel with switchable wide and narrow viewing angles and a display device.

Background

With the continuous progress of the liquid crystal display technology, the visual angle of the display is widened to more than 160 degrees from the original 112 degrees, and people enjoy the visual experience brought by a large visual angle and meanwhile want to effectively protect business confidentiality and personal privacy so as to avoid business loss or embarrassment caused by screen information leakage. In addition to the wide viewing angle requirement, there are many occasions where the display device is required to have a function of switching between wide and narrow viewing angles.

At present, the shutter shielding film is attached to the display screen to realize wide and narrow viewing angle switching, when peep prevention is needed, the shutter shielding film is utilized to shield the screen, so that the viewing angle 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 cannot be performed between the wide viewing angle mode and the narrow viewing angle mode, and the peep prevention sheet can cause luminance reduction to influence the display effect.

In the prior art, a dimming box and a display panel are used for realizing switching between a wide viewing angle and a narrow viewing angle, the display panel is used for normal picture display, the dimming box is used for controlling viewing angle switching, the dimming box comprises a first substrate, a second substrate and a liquid crystal layer between the first substrate and the second substrate, viewing angle control electrodes on the first substrate and the second substrate apply a vertical electric field to liquid crystal molecules, so that the liquid crystal deflects towards the vertical direction, and a narrow viewing angle mode is realized. Switching between a wide viewing angle and a narrow viewing angle can be achieved by controlling the voltage on the viewing angle control electrode. However, at a wide viewing angle, there is a problem that a large viewing angle is darker, resulting in poor wide viewing angle effect.

Disclosure of Invention

In order to overcome the defects and shortcomings in the prior art, the utility model aims to provide a display panel with switchable wide and narrow viewing angles and a display device, so as to solve the problem that the prior art has dark large viewing angle under the wide viewing angle.

The aim of the utility model is achieved by the following technical scheme:

the utility model provides a display panel with a switchable wide and narrow viewing angle, which comprises a first dimming box, a display liquid crystal box, a brightness enhancement film and a second dimming box which are sequentially stacked, wherein the first dimming box is positioned on the light emitting side of the display liquid crystal box, the second dimming box is positioned on the light entering side of the display liquid crystal box, and the brightness enhancement film is arranged between the display liquid crystal box and the second dimming box;

the first dimming box comprises a first substrate, a second substrate arranged opposite to the first substrate and a first liquid crystal layer positioned between the first substrate and the second substrate, wherein a first auxiliary electrode is arranged on the first substrate, and a first visual angle control electrode matched with the first auxiliary electrode is arranged on the second substrate; the second dimming box comprises a third substrate, a fourth substrate and a second liquid crystal layer, the fourth substrate is arranged opposite to the third substrate, the second liquid crystal layer is positioned between the third substrate and the fourth substrate, a second auxiliary electrode is arranged on the third substrate, and a second visual angle control electrode matched with the second auxiliary electrode is arranged on the fourth substrate;

when in a wide view angle mode, the first dimming box and the second dimming box are in a wide view angle state; in the narrow viewing angle mode, the first dimming box and the second dimming box are both in a narrow viewing angle state in the same direction.

Further, a first polaroid is arranged on one side, far away from the display liquid crystal box, of the first dimming box, a second polaroid is arranged between the first dimming box and the display liquid crystal box, a third polaroid is arranged between the display liquid crystal box and the second dimming box, the brightness enhancement film is arranged on one side, facing the second dimming box, of the third polaroid, a light transmission shaft of the first polaroid is parallel to a light transmission shaft of the second polaroid, and a light transmission shaft of the third polaroid is perpendicular to a light transmission shaft of the second polaroid.

Further, a transparent and reflective film is arranged between the first light regulating box and the display liquid crystal box, the transparent and reflective film is arranged on one side, facing the first light regulating box, of the second polaroid, a transparent shaft of the transparent and reflective film is parallel to a transparent shaft of the second polaroid, and a reflective shaft of the transparent and reflective film is perpendicular to a transparent shaft of the second polaroid.

Further, a viewing angle compensation film is arranged between the first dimming box and the display liquid crystal box, and the viewing angle compensation film is arranged on one side of the second polaroid, which faces the first dimming box.

Further, the liquid crystal molecules in the first liquid crystal layer are positive liquid crystal molecules, and in an initial state, the positive liquid crystal molecules in the first liquid crystal layer are aligned parallel to the first substrate and the second substrate;

or, the liquid crystal molecules in the first liquid crystal layer are negative liquid crystal molecules, and in an initial state, the negative liquid crystal molecules in the first liquid crystal layer are aligned perpendicular to the first substrate and the second substrate, or the initial alignment of the negative liquid crystal molecules in the first liquid crystal layer is oblique alignment.

Further, the liquid crystal molecules in the second liquid crystal layer are positive liquid crystal molecules, and in an initial state, the positive liquid crystal molecules in the second liquid crystal layer are aligned parallel to the third substrate and the fourth substrate;

or, the liquid crystal molecules in the second liquid crystal layer are negative liquid crystal molecules, and in an initial state, the negative liquid crystal molecules in the second liquid crystal layer are aligned perpendicular to the first substrate and the second substrate, or the initial alignment of the negative liquid crystal molecules in the second liquid crystal layer is oblique alignment.

Further, the first auxiliary electrode, the first viewing angle control electrode, the second auxiliary electrode and the second viewing angle control electrode are all planar electrodes arranged on the whole surface.

Further, the display liquid crystal box comprises a color film substrate, an array substrate arranged opposite to the color film substrate and a third liquid crystal layer arranged between the color film substrate and the array substrate, pixel electrodes distributed in an array mode are arranged on the array substrate, and a common electrode matched with the pixel electrodes is arranged on the color film substrate or the array substrate.

The application also provides a display device, which comprises the backlight module and the display panel, wherein the display panel is arranged on the light emitting side of the backlight module.

Further, the backlight module is a collimation backlight module, the collimation backlight module comprises a backlight source and a peep-proof layer, and the peep-proof layer is arranged on the light emitting side of the backlight source and is used for reducing the angle range of light ray emission.

The utility model has the beneficial effects that: the first dimming box and the second dimming box are respectively arranged on two sides of the display liquid crystal box and are matched with the brightness enhancement film to be used together, so that the view angle range of a wide view angle can be improved, the brightness of a large view angle under the wide view angle can be improved, and the problem that the large view angle is dark under the wide view angle is solved; and the first dimming box and the second dimming box are matched with each other, so that the influence of the brightness enhancement film on the narrow visual angle effect can be avoided.

Drawings

FIG. 1 is a schematic diagram of a display device with switchable wide and narrow viewing angles in an initial state according to the present utility model;

FIG. 2 is a schematic diagram of a display device with switchable wide and narrow viewing angles according to the present utility model;

FIG. 3 is a second schematic diagram of a display device with switchable wide and narrow viewing angles according to the present utility model;

FIG. 4 is a schematic diagram of a display device with switchable wide and narrow viewing angles according to the present utility model;

FIG. 5 is a schematic diagram showing a simulation comparison of a wide viewing angle and a narrow viewing angle switchable display device according to the present utility model;

FIG. 6 is a schematic diagram of a display device with switchable wide and narrow viewing angles in a narrow viewing angle according to the present utility model;

FIG. 7 is a schematic diagram of a display device with switchable wide and narrow viewing angles according to the present utility model at a narrow viewing angle;

FIG. 8 is a schematic diagram showing a simulation comparison of a wide-narrow viewing angle switchable display device according to the present utility model and a prior art at a narrow viewing angle;

FIG. 9 is a schematic plan view of a display device with switchable wide and narrow viewing angles according to the present utility model;

FIG. 10 is a schematic diagram showing a planar structure of a display device with switchable wide and narrow viewing angles according to the present utility model.

Detailed Description

In order to further describe the technical means and effects adopted by the utility model to achieve the preset aim, the following detailed description is given below of specific implementation, structure, characteristics and effects of the display panel and the display device with switchable wide and narrow viewing angles according to the utility model by combining the accompanying drawings and the preferred embodiment:

fig. 1 is a schematic diagram of a display device with switchable wide and narrow viewing angles in an initial state according to the present utility model. As shown in fig. 1, the display panel with switchable wide and narrow viewing angles provided by the utility model comprises a first dimming box 10, a display liquid crystal box 20, a brightness enhancement film 53 and a second dimming box 30 which are sequentially stacked, wherein the first dimming box 10 is positioned on the light emitting side of the display liquid crystal box 20, the second dimming box 30 is positioned on the light entering side of the display liquid crystal box 20, and the brightness enhancement film 53 is arranged between the display liquid crystal box 20 and the second dimming box 30.

The first dimming box 10 comprises a first substrate 11, a second substrate 12 arranged opposite to the first substrate 11, and a first liquid crystal layer 13 arranged between the first substrate 11 and the second substrate 12, wherein a first auxiliary electrode 111 is arranged on the first substrate 11, and a first viewing angle control electrode 121 matched with the first auxiliary electrode 111 is arranged on the second substrate 12. The deflection of the liquid crystal molecules in the first liquid crystal layer 13 is controlled by controlling the voltage difference between the first auxiliary electrode 111 and the first viewing angle control electrode 121, so that the first dimming cell 10 achieves control of wide-narrow viewing angle switching.

The first liquid crystal layer 13 preferably employs positive liquid crystal molecules, i.e., liquid crystal molecules having positive dielectric anisotropy. As shown in fig. 1, in the initial state, the positive liquid crystal molecules in the first liquid crystal layer 13 are aligned parallel to the first substrate 11 and the second substrate 12, and the alignment direction of the positive liquid crystal molecules near the first substrate 11 is parallel or antiparallel to the alignment direction of the positive liquid crystal molecules near the second substrate 12, so that the first light modulation cell 10 exhibits a wide viewing angle display in the initial state, as shown in fig. 2. As shown in fig. 6, when it is required to realize the narrow viewing angle display, a viewing angle control voltage is applied to the first auxiliary electrode 111 and the first viewing angle control electrode 121 such that a large voltage difference (for example, AC of 2.6V) is formed between the first auxiliary electrode 111 and the first viewing angle control electrode 121, the positive liquid crystal molecules in the first liquid crystal layer 13 are deflected in the vertical direction, and the positive liquid crystal molecules in the first liquid crystal layer 13 are in a tilted posture, thereby causing the first light modulation cell 10 to exhibit the narrow viewing angle display.

Of course, in other embodiments, the liquid crystal molecules in the first liquid crystal layer 13 may also be negative liquid crystal molecules, that is, liquid crystal molecules having negative dielectric anisotropy. In the initial state, the negative liquid crystal molecules in the first liquid crystal layer 13 are aligned perpendicular to the first and second substrates 11 and 12, so that the first light modulation cell 10 exhibits another wide viewing angle display in the initial state. Alternatively, the initial alignment of the negative liquid crystal molecules in the first liquid crystal layer 13 may be a tilt alignment, i.e., the first dimming cell 10 exhibits a narrow viewing angle display in the initial state.

The second dimming box 30 comprises a third substrate 31, a fourth substrate 32 arranged opposite to the third substrate 31 and a second liquid crystal layer 33 arranged between the third substrate 31 and the fourth substrate 32, wherein a second auxiliary electrode 311 is arranged on the third substrate 31, and a second viewing angle control electrode 321 matched with the second auxiliary electrode 311 is arranged on the fourth substrate 32. The deflection of the liquid crystal molecules in the second liquid crystal layer 33 is controlled by controlling the voltage difference between the second auxiliary electrode 311 and the second viewing angle control electrode 321, so that the second dimming cell 30 achieves control of the wide-narrow viewing angle switching.

The second liquid crystal layer 33 preferably employs positive liquid crystal molecules, i.e., liquid crystal molecules having positive dielectric anisotropy. As shown in fig. 3, at the initial state, the positive liquid crystal molecules in the second liquid crystal layer 33 are aligned parallel to the third and fourth substrates 31 and 32, and the positive liquid crystal molecules near the third substrate 31 are aligned parallel or antiparallel to the alignment direction of the positive liquid crystal molecules near the fourth substrate 32, so that the second dimming cell 30 exhibits a wide viewing angle display at the initial state, as shown in fig. 2. As shown in fig. 6, when it is required to realize the narrow viewing angle display, a viewing angle control voltage is applied to the second auxiliary electrode 311 and the second viewing angle control electrode 321 such that a large voltage difference (for example, AC of 2.6V) is formed between the second auxiliary electrode 311 and the second viewing angle control electrode 321, the positive liquid crystal molecules in the second liquid crystal layer 33 are deflected in the vertical direction, and the positive liquid crystal molecules in the second liquid crystal layer 33 are in a tilted posture, thereby causing the second dimming cell 30 to exhibit the narrow viewing angle display.

Of course, in other embodiments, the liquid crystal molecules in the second liquid crystal layer 33 may also be negative liquid crystal molecules, that is, liquid crystal molecules having negative dielectric anisotropy. In the initial state, the negative liquid crystal molecules in the second liquid crystal layer 33 are aligned perpendicular to the third and fourth substrates 31 and 32, so that the second dimming cell 30 is to exhibit another wide viewing angle display in the initial state. Alternatively, the initial alignment of the negative liquid crystal molecules in the second liquid crystal layer 33 may be a tilt alignment, i.e., the second light modulation cell 30 exhibits a narrow viewing angle display in the initial state.

In this embodiment, the first auxiliary electrode 111, the first viewing angle control electrode 121, the second auxiliary electrode 311, and the second viewing angle control electrode 321 are all planar electrodes disposed on the whole surface, so that the wide and narrow viewing angles can be switched over simultaneously on the whole surface.

The display liquid crystal cell 20 is used for controlling the gray scale display of a picture. The display liquid crystal box 20 comprises a color film substrate 21, an array substrate 22 arranged opposite to the color film substrate 21, and a third liquid crystal layer 23 arranged between the color film substrate 21 and the array substrate 22. The third liquid crystal layer 23 preferably employs positive liquid crystal molecules, i.e., liquid crystal molecules having positive dielectric anisotropy. In the initial state, the positive liquid crystal molecules in the third liquid crystal layer 23 are aligned parallel to the color film substrate 21 and the array substrate 22, and the positive liquid crystal molecules on the side close to the color film substrate 21 are aligned parallel or antiparallel to the alignment direction of the positive liquid crystal molecules on the side close to the array substrate 22. Of course, in other embodiments, the negative liquid crystal molecules may be used for the third liquid crystal layer 23, and the negative liquid crystal molecules in the third liquid crystal layer 23 may be aligned perpendicular to the color film substrate 21 and the array substrate 22, i.e. in a manner similar to the alignment of the VA display mode.

The color film substrate 21 is provided with a color resistance layer 212 arranged in an array and a black matrix 211 for spacing the color resistance layer 212, wherein the color resistance layer 212 comprises red (R), green (G) and blue (B) color resistance materials, and sub-pixels of the red (R), green (G) and blue (B) colors are correspondingly formed.

The array substrate 22 is defined by a plurality of scan lines and a plurality of data lines on a side facing the third liquid crystal layer 23, each pixel unit is provided with a pixel electrode 222 and a thin film transistor, and the pixel electrode 222 is electrically connected with the data line adjacent to the thin film transistor through the thin film transistor. The thin film transistor includes a gate electrode, an active layer, a drain electrode, and a source electrode, wherein the gate electrode and the scan line are disposed on the same layer and electrically connected, the gate electrode and the active layer are separated by an insulating layer, the source electrode and the data line are electrically connected, and the drain electrode and the pixel electrode 222 are electrically connected by a contact hole.

As shown in fig. 1, in the present embodiment, a common electrode 221 is further disposed on a side of the array substrate 22 facing the third liquid crystal layer 23, and the common electrode 221 and the pixel electrode 222 are located on different layers and are insulated and isolated by an insulating layer. The common electrode 221 may be located above or below the pixel electrode 222 (the common electrode 221 is shown below the pixel electrode 222 in fig. 1). Preferably, the common electrode 221 is a planar electrode disposed entirely, and the pixel electrode 222 is a block electrode disposed entirely within each pixel unit or a slit electrode having a plurality of electrode bars to form a fringe field switching pattern (Fringe Field Switching, FFS). Of course, in other embodiments, the pixel electrode 222 and the common electrode 221 may be located at the same layer, but they are insulated from each other, each of the pixel electrode 222 and the common electrode 221 may include a plurality of electrode bars, and the electrode bars of the pixel electrode 222 and the electrode bars of the common electrode 221 are alternately arranged with each other to form an In-Plane Switching (IPS). Alternatively, in other embodiments, the pixel electrode 222 is disposed on the side of the array substrate 22 facing the third liquid crystal layer 23, and the common electrode 221 is disposed on the side of the color film substrate 21 facing the third liquid crystal layer 23 to form a TN mode or a VA mode, and other descriptions of the TN mode and the VA mode refer to the prior art, and are not repeated here.

Further, a first polarizer 41 is disposed on a side of the first dimming cell 10 away from the display liquid crystal cell 20, a second polarizer 42 is disposed between the first dimming cell 10 and the display liquid crystal cell 20, a third polarizer 43 is disposed between the display liquid crystal cell 20 and the second dimming cell 30, and a brightness enhancement film 53 is disposed on a side of the third polarizer 43 facing the second dimming cell 30. The transmission axis of the first polarizer 41 is parallel to the transmission axis of the second polarizer 42, and the transmission axis of the third polarizer 43 is perpendicular to the transmission axis of the second polarizer 42. The brightness enhancement film 53 and the third polarizer 43 may be combined into a brightness enhancement type polarizer, and the brightness enhancement type polarizer may have a built-in haze or may have no haze. The light reflection surface of the brightness enhancement polarizer faces to one side of the second dimming box 30, the light transmission axis of the brightness enhancement polarizer is perpendicular to the light transmission axis of the second polarizer 42, and the light transmission axis of the brightness enhancement polarizer is perpendicular to the light reflection axis, so that the utilization rate of backlight can be improved, and the brightness enhancement purpose is achieved.

Further, a transflective film 51 is disposed between the first light modulation box 10 and the display liquid crystal box 20, the transflective film 51 is disposed on one side of the second polarizer 42 facing the first light modulation box 10, the light transmission axis of the transflective film 51 is parallel to the light transmission axis of the second polarizer 42, and the light reflection axis of the transflective film 51 is perpendicular to the light transmission axis of the second polarizer 42. The transflective film 51 may be an APF film (Advanced Polarizer Film, referred to as a reflective polarizing ultrathin optical film), and the specular reflectance (SCI) of the APF film may be 46% or more, and the transflective film 51 may reflect a certain amount of ambient light, thereby enhancing a narrow viewing angle effect.

Further, a viewing angle compensation film 52 is disposed between the first light modulation cell 10 and the display liquid crystal cell 20, and the viewing angle compensation film 52 is disposed on a side of the second polarizer 42 facing the first light modulation cell 10. By providing the viewing angle compensation film 52, the wide viewing angle effect and the narrow viewing angle effect can be further improved.

The first substrate 11, the second substrate 12, the color film substrate 21, the array substrate 22, the third substrate 31, and the fourth substrate 32 may be made of glass, acrylic, polycarbonate, or the like. The materials of the first auxiliary electrode 111, the first viewing angle control electrode 121, the common electrode 221, the pixel electrode 222, the second auxiliary electrode 311, and the second viewing angle control electrode 321 may be Indium Tin Oxide (ITO) or Indium Zinc Oxide (IZO), etc.

The present embodiment also provides a display device, including the backlight module 60 and the display panel described above, where the display panel is disposed on the light emitting side of the backlight module 60, and the backlight module 60 is used for providing a backlight source for the liquid crystal display device.

Preferably, the backlight module 60 adopts a collimating backlight module (CBL, collimated backlight) to collect light and ensure display effect.

The collimation backlight module comprises a backlight source 61 and a peep-proof layer 62, wherein the peep-proof layer 62 is arranged on the light emitting side of the backlight source 61, and the peep-proof layer 62 is used for reducing the range of light emitting angles. The peep-proof layer 62 is a micro shutter structure, which can block light with a larger incident angle, so that light with a smaller incident angle passes through, and the angle range of the light passing through the peep-proof layer 62 is reduced. The peep-proof layer 62 includes a plurality of parallel light-resisting walls and light holes between two adjacent light-resisting walls, and two sides of the light-resisting walls are provided with light-absorbing materials. Of course, the collimating backlight structure can also be realized by the backlight 61 and the prism film. The backlight 61 may also be a light-collecting backlight, so that the privacy layer 62 is not required, but the light-collecting backlight is more expensive than conventional backlights. The backlight module 60 may be a side-in backlight module or a direct-down backlight module.

Fig. 2 is a schematic diagram of a display device with switchable wide and narrow viewing angles according to the present utility model. FIG. 3 is a second schematic diagram of a display device with switchable wide and narrow viewing angles according to the present utility model. As shown in fig. 2, in the wide viewing angle mode, a common voltage signal is applied to the first auxiliary electrode 111 and the second auxiliary electrode 311, a wide viewing angle voltage signal is applied to the first viewing angle control electrode 121 and the second viewing angle control electrode 321, no vertical electric field or a small vertical electric field is formed between the first auxiliary electrode 111 and the first viewing angle control electrode 121 and between the second auxiliary electrode 311 and the second viewing angle control electrode 321, so that both the positive liquid crystal molecules in the first liquid crystal layer 13 and the positive liquid crystal molecules in the second liquid crystal layer 33 maintain an initial lying posture, and the first light modulation cell 10 and the second light modulation cell 30 are in the first wide viewing angle state. Of course, there is a large voltage difference (greater than 5V) between the first auxiliary electrode 111 and the first viewing angle control electrode 121 and between the second auxiliary electrode 311 and the second viewing angle control electrode 321, so that the positive liquid crystal molecules in the first liquid crystal layer 13 and the positive liquid crystal molecules in the second liquid crystal layer 33 deflect in the vertical direction and take a standing posture, and the first light modulation box 10 and the second light modulation box 30 are in the second wide viewing angle state. Wherein, in the wide viewing angle mode, the first and second dimming cases 10 and 30 may be in the first or second wide viewing angle state; the first dimming box 10 may be in a first wide viewing angle state, and the second dimming box 30 may be in a second wide viewing angle state; alternatively, as shown in fig. 3, the first light modulation box 10 is in the second wide viewing angle state, and the second light modulation box 30 is in the first wide viewing angle state.

Fig. 4 is a schematic diagram of a display device with switchable wide and narrow viewing angles according to the present utility model. As shown in fig. 4, after the light emitted by the backlight module 60 passes through the second dimming box 30, part of the light passes through the display liquid crystal box 20 and the first dimming box 10 in sequence, so as to realize wide viewing angle display; another part of the light is reflected by the brightness enhancement film 53, and when the light passes through the second dimming box 30 again, the light is scattered again, so that the light is emitted to the backlight module 60 to be recycled. The first dimming box and the second dimming box are used together with the brightness enhancement film, so that the view angle range of a wide view angle can be improved, the brightness of a large view angle under the wide view angle can be improved, and the problem that the large view angle is dark under the wide view angle is solved.

Fig. 6 is a schematic structural diagram of a display device with switchable wide and narrow viewing angles in the present utility model at a narrow viewing angle. As shown in fig. 6, in the narrow viewing angle mode, a common voltage signal is applied to the first auxiliary electrode 111 and the second auxiliary electrode 311, a narrow viewing angle voltage signal is applied to the first viewing angle control electrode 121 and the second viewing angle control electrode 321, and a large voltage difference (greater than 0.8V, as small as 3V, for example, 2.6V) is provided between the first auxiliary electrode 111 and the first viewing angle control electrode 121 and between the second auxiliary electrode 311 and the second viewing angle control electrode 321, so that both the positive liquid crystal molecules in the first liquid crystal layer 13 and the positive liquid crystal molecules in the second liquid crystal layer 33 are deflected in the vertical direction and take an inclined posture, and the light exit refraction angle is changed by using the arrangement direction of the positive liquid crystal molecules in the first liquid crystal layer 13 and the second liquid crystal layer 33, so that the viewing angle is changed, so that both the first light modulation box 10 and the second light modulation box 30 are in the narrow viewing angle state. In the narrow viewing angle mode, the first dimming box 10 and the second dimming box 30 are both in a narrow viewing angle in the same direction, for example, in a left-right narrow viewing angle state or in an up-down narrow viewing angle state.

Fig. 7 is a schematic diagram of a display device with switchable wide and narrow viewing angles according to the present utility model. As shown in fig. 7, after the light emitted by the backlight module 60 passes through the second dimming box 30, part of the light passes through the display liquid crystal box 20 and the first dimming box 10 in sequence, so as to realize narrow viewing angle display; another portion of the light is reflected back by the brightness enhancing film 53 for recycling. The first dimming box and the second dimming box are in a narrow visual angle state at the same time, so that the first dimming box and the second dimming box are matched with each other, and the influence of the brightness enhancement film on the narrow visual angle effect can be avoided.

The following table is a comparative simulation chart of the present utility model with respect to the prior art at wide/narrow viewing angles:

FIG. 5 is a schematic diagram showing the simulation comparison of the wide viewing angle and the narrow viewing angle of the display device of the present utility model. FIG. 8 is a schematic diagram showing the simulation comparison of the wide-narrow viewing angle switchable display device in the prior art with the narrow viewing angle. The implementations shown in fig. 5 and 8 represent the present application, and the dashed lines represent the prior art. As can be seen from fig. 5 and table one above, the brightness of the wide viewing angle can be improved, the 45 ° viewing angle improvement rate is 222%, and the center brightness is equivalent to the prior art. As can be seen from fig. 8 and table one above, the 45 ° viewing angle improvement rate is 146% at the narrow viewing angle, which is not different from the prior art, and the center brightness is also equivalent to the prior art, so that the narrow viewing angle effect can be basically kept unchanged.

Fig. 9 is a schematic plan view of a display device with switchable wide and narrow viewing angles according to the present utility model, and fig. 10 is a schematic plan view of a display device with switchable wide and narrow viewing angles according to the present utility model. Referring to fig. 9 and 10, the display device is provided with a viewing angle switching key 70 for a user to send a viewing angle switching request to the display device. The view angle switching key 70 may be a physical key (as shown in fig. 9), or may be a software control or Application (APP) to implement a switching function (as shown in fig. 10, for example, by setting a wide and narrow view angle through a slider bar). When a user needs to switch between a wide viewing angle and a narrow viewing angle, a viewing angle switching request can be sent to the display device by operating the viewing angle switching key 70, and finally, the driving chip 80 controls the electric signals applied to the first auxiliary electrode 111, the first viewing angle control electrode 121, the second auxiliary electrode 311 and the second viewing angle control electrode 321, so that the display device can realize the switching between the wide viewing angle and the narrow viewing angle, and when the display device is switched to the wide viewing angle, the driving method adopts the driving method corresponding to the wide viewing angle mode, and when the display device is switched to the narrow viewing angle, the driving method adopts the driving method corresponding to the narrow viewing angle mode.

In this document, terms such as up, down, left, right, front, rear, etc. are defined by the positions of the structures in the drawings and the positions of the structures with respect to each other, for the sake of clarity and convenience in expressing the technical solution. It should be understood that the use of such orientation terms should not limit the scope of the protection sought herein. It should also be understood that the terms "first" and "second," etc., as used herein, are used merely for distinguishing between names and not for limiting the number and order.

The present utility model is not limited to the preferred embodiments, but is capable of modification and variation in detail, and other modifications and variations can be made by those skilled in the art without departing from the scope of the present utility model.

Claims (10)

1. The display panel with the switchable wide and narrow viewing angles is characterized by comprising a first dimming box (10), a display liquid crystal box (20), a brightness enhancement film (53) and a second dimming box (30) which are sequentially stacked, wherein the first dimming box (10) is positioned on the light emitting side of the display liquid crystal box (20), the second dimming box (30) is positioned on the light entering side of the display liquid crystal box (20), and the brightness enhancement film (53) is arranged between the display liquid crystal box (20) and the second dimming box (30);

the first dimming box (10) comprises a first substrate (11), a second substrate (12) arranged opposite to the first substrate (11) and a first liquid crystal layer (13) arranged between the first substrate (11) and the second substrate (12), a first auxiliary electrode (111) is arranged on the first substrate (11), and a first visual angle control electrode (121) matched with the first auxiliary electrode (111) is arranged on the second substrate (12);

the second dimming box (30) comprises a third substrate (31), a fourth substrate (32) arranged opposite to the third substrate (31) and a second liquid crystal layer (33) arranged between the third substrate (31) and the fourth substrate (32), a second auxiliary electrode (311) is arranged on the third substrate (31), and a second visual angle control electrode (321) matched with the second auxiliary electrode (311) is arranged on the fourth substrate (32);

in a wide viewing angle mode, the first dimming box (10) and the second dimming box (30) are both in a wide viewing angle state; in the narrow viewing angle mode, the first dimming box (10) and the second dimming box (30) are in a narrow viewing angle state in the same direction.

2. The display panel with switchable wide and narrow viewing angles according to claim 1, wherein a first polarizer (41) is arranged on one side of the first light regulating box (10) away from the display liquid crystal box (20), a second polarizer (42) is arranged between the first light regulating box (10) and the display liquid crystal box (20), a third polarizer (43) is arranged between the display liquid crystal box (20) and the second light regulating box (30), the brightness enhancement film (53) is arranged on one side of the third polarizer (43) facing the second light regulating box (30), a light transmission shaft of the first polarizer (41) is parallel to a light transmission shaft of the second polarizer (42), and a light transmission shaft of the third polarizer (43) is perpendicular to a light transmission shaft of the second polarizer (42).

3. The display panel with switchable wide and narrow viewing angles according to claim 2, wherein a transflective film (51) is disposed between the first light adjusting box (10) and the display liquid crystal box (20), the transflective film (51) is disposed on one side of the second polarizer (42) facing the first light adjusting box (10), a light transmission axis of the transflective film (51) is parallel to a light transmission axis of the second polarizer (42), and a light reflection axis of the transflective film (51) is perpendicular to a light transmission axis of the second polarizer (42).

4. The display panel with switchable wide and narrow viewing angles according to claim 2, wherein a viewing angle compensation film (52) is arranged between the first dimming box (10) and the display liquid crystal box (20), and the viewing angle compensation film (52) is arranged on one side of the second polarizer (42) facing the first dimming box (10).

5. The wide-and-narrow-viewing-angle switchable display panel according to claim 1, characterized in that the liquid crystal molecules in the first liquid crystal layer (13) are positive liquid crystal molecules, which in an initial state, in the first liquid crystal layer (13) are aligned parallel to the first substrate (11) and the second substrate (12);

alternatively, the liquid crystal molecules in the first liquid crystal layer (13) are negative liquid crystal molecules, and in an initial state, the negative liquid crystal molecules in the first liquid crystal layer (13) are aligned perpendicular to the first substrate (11) and the second substrate (12), or the initial alignment of the negative liquid crystal molecules in the first liquid crystal layer (13) is tilted alignment.

6. The wide-and-narrow-viewing-angle switchable display panel according to claim 1, characterized in that the liquid crystal molecules in the second liquid crystal layer (33) are positive liquid crystal molecules, and in an initial state, the positive liquid crystal molecules in the second liquid crystal layer (33) are aligned parallel to the third substrate (31) and the fourth substrate (32);

alternatively, the liquid crystal molecules in the second liquid crystal layer (33) are negative liquid crystal molecules, and in an initial state, the negative liquid crystal molecules in the second liquid crystal layer (33) are aligned perpendicular to the first substrate (11) and the second substrate (12), or the initial alignment of the negative liquid crystal molecules in the second liquid crystal layer (33) is tilted alignment.

7. The display panel according to any one of claims 1 to 6, wherein the first auxiliary electrode (111), the first viewing angle control electrode (121), the second auxiliary electrode (311) and the second viewing angle control electrode (321) are all planar electrodes disposed over the entire surface.

8. The display panel according to any one of claims 1 to 6, wherein the display liquid crystal cell (20) comprises a color film substrate (21), an array substrate (22) opposite to the color film substrate (21), and a third liquid crystal layer (23) located between the color film substrate (21) and the array substrate (22), pixel electrodes (222) distributed in an array are disposed on the array substrate (22), and a common electrode (221) matched with the pixel electrodes (222) is disposed on the color film substrate (21) or the array substrate (22).

9. A display device comprising a backlight module (60) and a display panel according to any of claims 1-8, said display panel being arranged on the light exit side of said backlight module (60).

10. The display device according to claim 9, wherein the backlight module (60) is a collimated backlight module, the collimated backlight module includes a backlight source (61) and a peep-proof layer (62), and the peep-proof layer (62) is disposed on a light emitting side of the backlight source (61) and is used for reducing an angle range of light emission.