CN114594622B - Display panel with switchable wide and narrow viewing angles and display device - Google Patents

Abstract

The invention discloses a display panel with a switchable wide and narrow viewing angles and a display device. By arranging the patterned diffusion region and the non-diffusion region on the display panel with the switchable wide and narrow viewing angles, the diffusion capability of the diffusion region to light is stronger than that of the non-diffusion region, so that the display panel has different viewing angle ranges of the diffusion region and the non-diffusion region when in a narrow viewing angle, a user can see the light diffused by the diffusion region in a large viewing angle direction, the patterns of the diffusion region can be designed, the patterns corresponding to the diffusion region can be seen in the large viewing angle direction of the narrow viewing angle, and the displayed picture can be seen in the peeping prevention angle range.

Description

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

Technical Field

The invention 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.

The display panel in the prior art is only used for displaying pictures in a wide view angle or a narrow view angle, and can not be used for viewing the display pictures in the narrow view angle, and displaying LOGO (trademark) can be seen.

Disclosure of Invention

In order to overcome the defects and shortcomings in the prior art, the invention aims to provide a display panel with a switchable wide and narrow viewing angles and a display device, so as to solve the problem that the display panel in the prior art can not see a display picture and display LOGO at the same time when the display panel is at the narrow viewing angle.

The aim of the invention is achieved by the following technical scheme:

the invention provides a display panel with a switchable wide and narrow viewing angle, which can be switched between the wide viewing angle and the narrow viewing angle, and comprises a display area and a non-display area positioned at the peripheral edge of the display area, wherein the display area comprises a patterned diffusion area and a non-diffusion area, and the diffusion area has strong light scattering capacity relative to the non-diffusion area.

Further, the display panel is provided with a diffusion structure corresponding to the diffusion region, and the diffusion structure can scatter light passing through the diffusion structure.

Further, the diffusion structure comprises a prism layer and a medium layer which is arranged on the prism layer, wherein the medium layer is arranged on the upper surface of the prism layer, and the refractive index of the prism layer is larger than that of the medium layer; or, the medium layer is arranged on the lower surface of the prism layer, and the refractive index of the prism layer is smaller than that of the medium layer.

Further, the display panel comprises a dimming box and a display box which are mutually overlapped;

the dimming box comprises a first substrate, a second substrate arranged opposite to the first substrate and a first liquid crystal layer arranged between the first substrate and the second substrate, wherein a first visual angle electrode is arranged on one side of the first substrate facing the first liquid crystal layer, and a second visual angle electrode matched with the first visual angle electrode is arranged on one side of the second substrate facing the first liquid crystal layer;

the display box comprises a color film substrate, an array substrate arranged opposite to the color film substrate and a second liquid crystal layer arranged between the color film substrate and the array substrate.

Further, the diffusion structure is arranged on the first substrate; or, the diffusion structure is disposed on the second substrate.

Further, a first polaroid is arranged on one side, far away from the display box, of the dimming box, a second polaroid is arranged between the dimming box and the display box, a third polaroid is arranged on one side, far away from the dimming box, of the display box, 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 visual angle compensation film is further arranged between the dimming box and the display box, and/or the second polaroid is a composite structure film of the APF film and the visual angle compensation film.

Further, the display panel is provided with a light condensing structure corresponding to the non-diffusion region, and the light condensing structure can collect light passing through the light condensing structure.

Further, the diffusion region is located at the center of the display region, and the non-diffusion region surrounds the periphery of the diffusion region.

The invention also provides a display device which comprises the display panel with the switchable wide and narrow visual angles.

The invention has the beneficial effects that: by arranging the patterned diffusion region and the non-diffusion region on the display panel with the switchable wide and narrow viewing angles, the diffusion capability of the diffusion region to light is stronger than that of the non-diffusion region, so that the display panel has different viewing angle ranges of the diffusion region and the non-diffusion region when in a narrow viewing angle, a user can see the light diffused by the diffusion region in a large viewing angle direction, the patterns of the diffusion region can be designed, the patterns corresponding to the diffusion region can be seen in the large viewing angle direction of the narrow viewing angle, and the displayed picture can be seen in the peeping prevention angle range.

Drawings

FIG. 1 is a schematic diagram of a display device with switchable wide and narrow viewing angles in a wide viewing angle;

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

FIG. 3 is a schematic plan view of a display panel with switchable wide and narrow viewing angles according to the present invention;

FIG. 4 is a schematic perspective view of a prism layer and a second substrate according to the present invention;

FIG. 5 is a graph of simulated data for a wide view angle and a narrow view angle of the present invention versus the prior art;

FIG. 6 is a schematic plan view of a display device with switchable wide and narrow viewing angles according to the present invention;

FIG. 7 is a schematic diagram showing a second planar structure of a display device with switchable wide and narrow viewing angles according to the present invention;

FIG. 8 is a schematic flow chart of a manufacturing process of a diffusion structure in the present invention.

Detailed Description

In order to further describe the technical means and effects adopted by the invention 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 invention 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 the present invention. Fig. 2 is a schematic structural diagram of a display device with switchable wide and narrow viewing angles in the present invention at a narrow viewing angle. Fig. 3 is a schematic plan view of a display panel with switchable wide and narrow viewing angles according to the present invention. Fig. 4 is a schematic perspective view of a prism layer and a second substrate according to the present invention. Fig. 5 is a graph of simulated data for a wide view angle and a narrow view angle of the present invention compared to the prior art.

As shown in fig. 1 to 4, the display panel with switchable wide and narrow viewing angles provided by the present invention can switch between the wide viewing angle and the narrow viewing angle. The display panel has a display area 100 and a non-display area 200 located at the peripheral edge of the display area 100, where the display area 100 includes a patterned diffusion area 110 and a non-diffusion area 120, and the diffusion area 110 has a stronger scattering ability for light than the non-diffusion area 120, or the diffusion area 110 has a weaker converging ability for light than the non-diffusion area 120.

By arranging the patterned diffusion region 110 and the non-diffusion region 120 on the display panel with switchable wide and narrow viewing angles, the diffusion capability of the diffusion region 110 to light is stronger than that of the non-diffusion region 120 to light, so that when the display panel is at a narrow viewing angle, the diffusion region 110 is different from the non-diffusion region 120 in viewing angle range, a user can see the light diffused by the diffusion region 110 at a large viewing angle, and the pattern (LOGO pattern shown in fig. 4) of the diffusion region 110 can be designed, so that the pattern corresponding to the diffusion region 110 can be seen at the large viewing angle direction of the narrow viewing angle, namely the LOGO pattern can be seen at the large viewing angle direction of the narrow viewing angle, and the displayed picture can be seen in the peeping-proof range, thereby improving the client brand effect.

In this embodiment, the diffusion region 110 is preferably located at the center of the display region 100, and the non-diffusion region 120 surrounds the periphery of the diffusion region 110. Of course, the diffusion region 110 may be adjusted according to the display position required by the LOGO pattern, and the size of the diffusion region 110 may also be adjusted according to the LOGO pattern. Preferably, the LOGO font width needs to be on the order of millimeters so as to be recognizable to the human eye.

In this embodiment, the display panel is provided with a diffusion structure corresponding to the diffusion region 110, and the diffusion structure can scatter the light passing through the diffusion structure. Of course, a light condensing structure corresponding to the non-diffusion region 120 may be disposed on the display panel, and the light condensing structure can condense the light passing through the light condensing structure, so that the viewing angle range of the diffusion region 110 and the non-diffusion region 120 is different in the narrow viewing angle.

Further, the diffusing structure includes a prism layer 122 and a dielectric layer 123 stacked on the prism layer 122, and as known from the light refraction law (n1sinθ1=n2sinθ2), light is refracted by the dielectrics with different refractive indexes to realize astigmatism. For example, the dielectric layer 123 is disposed on the upper surface of the prism layer 122, and the refractive index of the prism layer 122 is greater than the refractive index of the dielectric layer 123. Alternatively, the dielectric layer 123 is disposed on the lower surface of the prism layer 122, and the refractive index of the prism layer 122 is smaller than that of the dielectric layer 123. Wherein, the light emitting direction of the backlight is from bottom to top.

Further, the cross-sectional shape of the prism layer 122 may be triangular, trapezoidal, or semicircular. Prism layer 122 may be made of an insulating layer material (PV) having a refractive index of 1.91, dielectric layer 123 may be made of a planar layer material (OC) having a refractive index of 1.56, and the thickness of prism layer 122 may be adjusted according to the desired scattering range, such as the following table:

for example, the normal viewing angle for privacy is-45 ° to 45 °, which can control the diffusion range of the diffusion structure to-30 ° to-60 ° and 30 ° to 60 °, so that normal pictures can be seen in the range of-45 ° to 45 °, and LOGO patterns can be seen in the range of-45 ° to-60 ° and 45 ° to 60 °, without the displayed pictures being seen. Referring to fig. 5, a curve W is a view angle and transmittance curve of a wide view angle, a curve N1 is a view angle and transmittance curve of a narrow view angle in the prior art, a curve N2 is a view angle and transmittance curve of a narrow view angle in the present embodiment, and a region a on the curve N2 is a view angle range in which the LOGO pattern is visible. The front and side LOGO patterns are not visible at wide viewing angles because the diffusion region 110 has less difference in brightness between the front and large viewing angles and the non-diffusion region 120.

In this embodiment, as shown in fig. 1 and 2, the display panel with switchable wide and narrow viewing angles includes a dimming box 10 and a display box 20 stacked on each other. Preferably, the dimming box 10 is disposed above the display box 20, that is, the display box 20 is disposed between the dimming box 10 and the backlight module 40, the dimming box 10 is used for controlling the viewing angle of the liquid crystal display device, and the display box 20 is used for controlling the liquid crystal display device to display a normal picture. Of course, the dimming box 10 may also be disposed below the display box 20, i.e. the dimming box 10 is disposed between the display box 20 and the backlight module 40. Of course, in other embodiments, the display panel with switchable wide and narrow viewing angles may also be another type of display panel, which only needs to have the function of switching wide and narrow viewing angles.

The 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. The first substrate 11 is provided with a first viewing angle electrode 111 on a side facing the first liquid crystal layer 13, the second substrate 12 is provided with a second viewing angle electrode 121 matched with the first viewing angle electrode 111 on a side facing the first liquid crystal layer 13, and deflection of liquid crystal molecules in the first liquid crystal layer 13 is controlled by controlling a pressure difference between the first viewing angle electrode 111 and the second viewing angle electrode 121, so that wide and narrow viewing angle switching is controlled.

The first liquid crystal layer 13 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 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 dimming cell 10 exhibits a wide viewing angle display in the initial state, as shown in fig. 1. As shown in fig. 2, when it is required to realize the narrow viewing angle display, a viewing angle control voltage is applied to the first viewing angle electrode 111 or the second viewing angle electrode 121 such that a large voltage difference (for example, AC of 2.6V) is formed between the first viewing angle electrode 111 and the second viewing angle electrode 121, and the positive liquid crystal molecules in the first liquid crystal layer 13 are deflected in the vertical direction, so that the dimming cell 10 exhibits the narrow viewing angle display.

In this embodiment, the display case 20 is a liquid crystal case. Of course, in other embodiments, the display box 20 may also be a self-luminous display (e.g., OLED display, micro LED display).

The display box 20 includes a color film substrate 21, an array substrate 22 disposed opposite to the color film substrate 21, and a second liquid crystal layer 23 disposed between the color film substrate 21 and the array substrate 22. The second 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 second 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 second liquid crystal layer 23 may also use negative liquid crystal molecules, and the negative liquid crystal molecules in the second liquid crystal layer 23 may be aligned perpendicular to the color film substrate 21 and the array substrate 22, i.e. in an alignment manner similar to the VA display mode.

Further, a first polarizer 31 is disposed on a side of the light modulation box 10 away from the display box 20, a second polarizer 32 is disposed between the light modulation box 10 and the display box 20, a third polarizer 33 is disposed on a side of the display box 20 away from the light modulation box 10, a light transmission axis of the first polarizer 31 is parallel to a light transmission axis of the second polarizer 32, and a light transmission axis of the third polarizer 33 is perpendicular to a light transmission axis of the second polarizer 32.

Preferably, a viewing angle compensation film is further provided between the dimming box 10 and the display box 20 to enhance a narrow viewing angle effect. Of course, the second polarizer 32 may also be a composite structure film of the APF film and the viewing angle compensation film, where the composite structure film has both a polarizing effect and a reflective effect, and the bright surface of the composite structure film is always upward, so that the narrow viewing angle effect can be further increased.

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 second 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 second 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 facing the second liquid crystal layer 23 of the array substrate 22, and the common electrode 221 is disposed on the side facing the second liquid crystal layer 23 of the color film substrate 21 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 herein.

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

In this embodiment, the diffusion structure is disposed on the second substrate 12, and disposed on the second substrate 12, so that the LOGO pattern can be better used in a narrow-viewing-angle side view. Wherein, the prism layer 122 and the dielectric layer 123 may be formed on the surface of the second substrate 12 through a mask process. Of course, the diffusion structure may also be disposed on the first substrate 11; or on the color film substrate 21 or the array substrate 22.

The embodiment also provides a display device, which includes the display panel with switchable wide and narrow viewing angles, and a backlight module 40, wherein the backlight module 40 is used for providing a backlight source for the liquid crystal display device. Of course, if the display case 20 employs a self-luminous display, the display device does not need to be additionally provided with a backlight.

Preferably, the backlight module 40 adopts a collimated backlight (CBL, collimated backlight) mode, which can collect light to ensure display effect.

The backlight module 40 includes a backlight 41 and a peep-proof layer 43, wherein the peep-proof layer 43 is used for reducing the range of the light emitting angle. A brightness enhancement film 42 is further disposed between the backlight 41 and the peep-proof layer 43, and the brightness enhancement film 42 increases the brightness of the backlight module 40. The peep-proof layer 43 is a micro shutter structure, which can block light with a larger incident angle, so that light with a smaller incident angle passes through the shutter structure, and the angle range of the light passing through the peep-proof layer 43 is reduced. The peep-proof layer 43 comprises a plurality of parallel light-resisting walls and light holes between two adjacent light-resisting walls, and light-absorbing materials are arranged on two sides of the light-resisting walls. Of course, the backlight 41 may be a light-collecting type backlight, so that the peep-proof layer 43 is not required, but the light-collecting type backlight is more expensive than a conventional backlight. The backlight module 40 may be a side-in type backlight module or a direct type backlight module.

Fig. 6 is a schematic plan view of a display device with switchable wide and narrow viewing angles according to the present invention, and fig. 7 is a schematic plan view of a display device with switchable wide and narrow viewing angles according to the present invention. Referring to fig. 6 and 7, the display device is provided with a viewing angle switching key 50 for a user to send a viewing angle switching request to the display device. The view angle switching key 50 may be a physical key (as shown in fig. 6), or may be a software control or Application (APP) to implement a switching function (as shown in fig. 7, 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 50, and finally, the driving chip 60 controls the electric signals applied to the first viewing angle electrode 111 and the second viewing angle electrode 121, so that the display device can realize the switching between the wide viewing angle and the narrow viewing angle.

FIG. 8 is a schematic diagram of a process for fabricating a diffusion structure according to the present invention.

As shown in fig. 8, in the present embodiment, the diffusion structure is provided on the second substrate 12 of the dimming box 10, which is an example, but the present invention is not limited thereto.

S1: coating the PV layer 14 over the second substrate 12;

s2: coating a photoresist layer 15 on the whole surface of the PV layer;

s3: exposing the photoresist layer 15 through a mask 16, wherein the position of the mask 16 corresponding to the diffusion structure is not transparent;

s4: performing development treatment, wherein the photoresist layer 15 at the position except the diffusion structure is reserved, and the photoresist layer 15 at other positions on the PV layer 14 is completely removed;

s5: etching the PV layer 14, wherein the PVC layer 14 except the position covered by the photoresist layer 15 is reserved, and the PVC layer 14 at other positions on the substrate 12 is completely removed;

s6: stripping the photoresist layer 15 overlying the PV layer 14 to form a prism layer 122 of a diffusion structure;

s7: a dielectric layer 123 is formed on the substrate 12 to cover the prism layer 122 to form a diffusion structure.

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 invention 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 invention.

Claims (7)

1. A wide-and-narrow viewing angle switchable display panel capable of switching between a wide viewing angle and a narrow viewing angle, characterized in that the display panel has a display area (100) and a non-display area (200) located at a peripheral edge of the display area (100), the display area (100) comprising a patterned diffusion area (110) and a non-diffusion area (120), the diffusion area (110) having a strong scattering ability for light relative to the non-diffusion area (120);

the display panel comprises a dimming box (10) and a display box (20) which are mutually overlapped, wherein the display panel is provided with a diffusion structure corresponding to the diffusion region (110), and the diffusion structure can scatter light rays passing through the diffusion structure;

the light regulating box (10) comprises a first substrate (11), a second substrate (12) which is arranged opposite to the first substrate (11) and a first liquid crystal layer (13) which is arranged between the first substrate (11) and the second substrate (12), wherein a first visual angle electrode (111) is arranged on one side of the first substrate (11) facing the first liquid crystal layer (13), a second visual angle electrode (121) which is matched with the first visual angle electrode (111) is arranged on one side of the second substrate (12) facing the first liquid crystal layer (13), and the diffusion structure is arranged on the first substrate (11) or on the second substrate (12);

the display box (20) comprises a color film substrate (21), an array substrate (22) arranged opposite to the color film substrate (21) and a second liquid crystal layer (23) arranged between the color film substrate (21) and the array substrate (22).

2. The display panel according to claim 1, wherein the diffusion structure comprises a prism layer (122) and a dielectric layer (123) stacked with the prism layer (122), the dielectric layer (123) is disposed on an upper surface of the prism layer (122), and a refractive index of the prism layer (122) is greater than a refractive index of the dielectric layer (123); or, the dielectric layer (123) is disposed on the lower surface of the prism layer (122), and the refractive index of the prism layer (122) is smaller than that of the dielectric layer (123).

3. The display panel with switchable wide and narrow viewing angles according to claim 1, wherein a first polarizer (31) is arranged on one side, far away from the display box (20), of the light regulating box (10), a second polarizer (32) is arranged between the light regulating box (10) and the display box (20), a third polarizer (33) is arranged on one side, far away from the light regulating box (10), of the display box (20), a light transmission axis of the first polarizer (31) is parallel to a light transmission axis of the second polarizer (32), and a light transmission axis of the third polarizer (33) is perpendicular to a light transmission axis of the second polarizer (32).

4. A display panel according to claim 3, characterized in that a viewing angle compensation film is further provided between the light modulation box (10) and the display box (20), and/or the second polarizer (32) is a composite structure film of an APF film and a viewing angle compensation film.

5. The switchable wide and narrow viewing angle display panel according to claim 1, characterized in that the display panel is provided with a light collecting structure corresponding to the non-diffusing region (120), which light collecting structure is capable of collecting light rays passing through the light collecting structure.

6. The wide and narrow viewing angle switchable display panel according to claim 1, wherein the diffusion region (110) is located at the center of the display region (100), and the non-diffusion region (120) surrounds the periphery of the diffusion region (110).

7. A display device comprising the display panel according to any one of claims 1 to 6, which is switchable between wide and narrow viewing angles.