CN214174773U

CN214174773U - Display device

Info

Publication number: CN214174773U
Application number: CN202120316198.XU
Authority: CN
Inventors: 刘涛; 李想; 刘显贺; 魏雅
Original assignee: InfoVision Optoelectronics Kunshan Co Ltd
Current assignee: InfoVision Optoelectronics Kunshan Co Ltd
Priority date: 2021-02-03
Filing date: 2021-02-03
Publication date: 2021-09-10
Anticipated expiration: 2031-02-03

Abstract

The embodiment of the utility model discloses display device. The display device includes: a liquid crystal display panel and a backlight module; the liquid crystal display panel comprises a peep-proof film and a visual angle switching film, wherein the visual angle switching film is positioned on one side of the liquid crystal display panel, which is far away from the backlight module, and the peep-proof film is positioned on one side of the visual angle switching film, which faces the backlight module; the viewing angle switching film includes: the liquid crystal display panel comprises a first electrode and a second electrode which are oppositely arranged, wherein the first electrode is positioned on one side of the second electrode facing the liquid crystal display panel; wherein the number of the first electrodes and/or the second electrodes is multiple; and a polymer liquid crystal layer between the first electrode and the second electrode. The embodiment of the utility model provides a technical scheme can freely switch under narrow visual angle mode and wide visual angle mode, and does not increase the consumption.

Description

Display device

Technical Field

The embodiment of the utility model provides a relate to and show technical field, especially relate to a display device.

Background

With the development of network technology, users can make purchases, account transactions, transfer work documents and the like through electronic devices, and personal information or business secrets are easily leaked. Accordingly, the peep prevention performance of the display device is receiving more and more attention.

At present, most display devices with peep-proof function realize the peep-proof effect by arranging a shutter film. However, if the louver film is designed to ensure that the brightness is small at a large viewing angle and thus a good peep-proof effect is achieved, the brightness needs to be increased to increase the brightness at the large viewing angle to achieve the effect of enlarging the viewing angle, but this increases power consumption; if the design of the louver film ensures that the brightness is sufficiently high under a large viewing angle, the peep-proof effect is poor.

SUMMERY OF THE UTILITY MODEL

The utility model provides a display device freely switches under narrow visual angle mode and wide visual angle mode, and does not increase the consumption.

In a first aspect, an embodiment of the present invention provides a display device, including:

a liquid crystal display panel and a backlight module;

the liquid crystal display panel comprises a peep-proof film and a visual angle switching film, wherein the visual angle switching film is positioned on one side of the liquid crystal display panel, which is far away from the backlight module, and the peep-proof film is positioned on one side of the visual angle switching film, which is towards the backlight module;

the viewing angle switching film includes:

the liquid crystal display panel comprises a first electrode, a second electrode and a polymer liquid crystal layer, wherein the first electrode and the second electrode are oppositely arranged, and the polymer liquid crystal layer is positioned between the first electrode and the second electrode; the first electrode is positioned on one side of the second electrode facing the liquid crystal display panel; wherein the number of the first electrode and/or the second electrode is plural.

Optionally, the privacy film is positioned between the liquid crystal display panel and the first electrode.

Optionally, the privacy film comprises light shading strips and light transmitting strips which extend along the first direction and are alternately arranged along the second direction; wherein the first direction and the second direction intersect.

Optionally, the peep-proof film comprises a plurality of peep-proof areas, each peep-proof area comprises light shading strips and light transmission strips which are alternately arranged along a second direction and extend along a first direction, and the light shading strips and the light transmission strips which are alternately arranged along the first direction and extend along the second direction;

wherein the first direction and the second direction intersect.

Optionally, the display device further includes a reflective film, and the reflective film includes a reflective strip disposed on a side of the light-shielding strip facing away from the liquid crystal display panel.

Optionally, the liquid crystal display panel includes a black matrix, the black matrix includes horizontal light-shielding strips extending along a third direction and arranged along a fourth direction, and vertical light-shielding strips extending along the fourth direction and arranged along the third direction, and the horizontal light-shielding strips and the vertical light-shielding strips intersect to form a grid;

the horizontal shading strips and the vertical shading strips are rectangular.

Optionally, the shading strip and the light transmission strip are rectangular;

wherein neither the first direction nor the second direction is parallel to the third direction, and neither the first direction nor the second direction is parallel to the fourth direction.

Optionally, the light shielding strip and the light transmitting strip are in a wave shape or a broken line shape.

Optionally, the peep-proof film is located between the liquid crystal display panel and the backlight module.

Optionally, the display device further includes a control chip, and the first electrode and the second electrode are electrically connected to the control chip.

The embodiment of the utility model provides a display device, through addding visual angle switching film, visual angle switching film includes first electrode, second electrode and polymer liquid crystal layer, and wherein, the polymer liquid crystal layer changes between transparent state and fog-state according to the voltage difference between first electrode and the second electrode, makes when polymer liquid crystal layer transparent state, and the polymer liquid crystal layer does not have the effect of scattering light, and the light of small angle still is the light of small angle behind the polymer liquid crystal layer, thereby makes display device be in narrow visual angle mode; when the polymer liquid crystal layer is in a foggy state, the polymer liquid crystal layer has the function of scattering light, and can change light with a small angle into light with a large angle, so that the display device is in a wide visual angle mode, the problem that the wide and narrow visual angles can not be switched in the prior art is solved, free switching in the narrow visual angle mode and the wide visual angle mode is realized, and the power consumption effect is not increased.

Drawings

Fig. 1 is a schematic structural diagram of a display device according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of another display device according to an embodiment of the present invention;

fig. 3 is a schematic view of a light ray passing through a viewing angle switching film according to an embodiment of the present invention;

fig. 4 is a schematic view of another light ray passing through the viewing angle switching film according to the embodiment of the present invention;

fig. 5 is a schematic view illustrating a display device according to an embodiment of the present invention performing black-and-white display by using a viewing angle switching film;

fig. 6 is a schematic structural diagram of a control chip providing voltage to a second electrode according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a peep-proof membrane provided in an embodiment of the present invention;

fig. 8 is a schematic structural view of another peep-proof membrane provided in the embodiment of the present invention;

fig. 9 is a schematic structural diagram of another display device according to an embodiment of the present invention;

FIG. 10 is a schematic view of one configuration of the reflective film and privacy film of FIG. 9;

FIG. 11 is a cross-sectional view along AA' of FIG. 10;

fig. 12 is a schematic structural diagram of a black matrix according to an embodiment of the present invention;

fig. 13 is a schematic structural view of another peep-proof membrane provided in the embodiment of the present invention;

fig. 14 is a schematic structural view of another peep-proof membrane provided in an embodiment of the present invention;

wherein, the embodiment of the utility model provides an in, the reference numeral and the characteristic name that corresponds:

10-backlight module, 20-liquid crystal display panel, 210-color film substrate, 211-first substrate, 212-black matrix, 2121-horizontal shading strip, 2122-vertical shading strip, 213-color resistance layer, 214-first planarization layer, 220-array substrate, 221-second substrate, 222-first prism structure, 223-second planarization layer, 224-common electrode layer, 225-second insulating layer, 226-pixel electrode layer, 230-liquid crystal layer, 30-privacy film, 30Z-privacy area, 31-shading strip, 32-light transmission strip, 33-wave structure, 34-broken line structure, 40-visual angle switching film, 41-first electrode, 42-second electrode, 43-polymer liquid crystal layer, 51-first substrate, 52-second substrate, 60-brightness enhancement film, 71-first signal line, 72-second signal line, 73-switching transistor, 80-reflective film, 81-reflective strip, Y1-first direction, X1-second direction, Y2-third direction, X2-fourth direction.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In view of the technical problem mentioned in the background, an embodiment of the present invention provides a display device, including: a liquid crystal display panel and a backlight module; the liquid crystal display panel comprises a peep-proof film and a visual angle switching film, wherein the visual angle switching film is positioned on one side of the liquid crystal display panel, which is far away from the backlight module, and the peep-proof film is positioned on one side of the visual angle switching film, which faces the backlight module; the viewing angle switching film includes: the liquid crystal display panel comprises a first electrode, a second electrode and a polymer liquid crystal layer, wherein the first electrode and the second electrode are oppositely arranged, and the polymer liquid crystal layer is positioned between the first electrode and the second electrode; the first electrode is positioned on one side of the second electrode facing the liquid crystal display panel; wherein, the number of the first electrode and/or the second electrode is a plurality. By adopting the technical scheme, the visual angle switching film is additionally arranged and comprises the first electrode, the second electrode and the polymer liquid crystal layer, wherein the polymer liquid crystal layer is switched between a transparent state and a fog state according to the voltage difference between the first electrode and the second electrode, so that when the polymer liquid crystal layer is in the transparent state, the polymer liquid crystal layer does not have the function of scattering light, and the light with small angle still becomes the light with small angle after passing through the polymer liquid crystal layer, so that the display device is in a narrow visual angle mode; when the polymer liquid crystal layer is in a foggy state, the polymer liquid crystal layer has the function of scattering light, and can change light with a small angle into light with a large angle, so that the display device is in a wide visual angle mode, the problem that the wide and narrow visual angles can not be switched in the prior art is solved, free switching in the narrow visual angle mode and the wide visual angle mode is realized, and the power consumption effect is not increased.

The above is the core idea of the present application, and the technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, under the premise that creative work is not done by ordinary skilled in the art, all other embodiments obtained all belong to the protection scope of the present invention.

Fig. 1 is a schematic structural diagram of a display device according to an embodiment of the present invention. Fig. 2 is a schematic structural diagram of another display device according to an embodiment of the present invention. Referring to fig. 1 and 2, the display device includes: a liquid crystal display panel 20 and a backlight module 10; the display panel comprises a peep-proof film 30 and a visual angle switching film 40, wherein the visual angle switching film 40 is positioned on one side of the liquid crystal display panel 20, which is far away from the backlight module 10, and the peep-proof film 30 is positioned on one side of the visual angle switching film 40, which is towards the backlight module 10; the viewing angle switching film 40 includes: a first electrode 41 and a second electrode 42 oppositely arranged, wherein the first electrode 41 is positioned on one side of the second electrode 42 facing the liquid crystal display panel 20; wherein, the number of the first electrode 41 and/or the second electrode 42 is multiple; a polymer liquid crystal layer 43 between the first electrode 41 and the second electrode 42.

Specifically, the liquid crystal display panel 20 is used for displaying a picture to be displayed, and a specific structure thereof can be set by a person skilled in the art according to actual situations, and is not limited herein. For example, fig. 1 and fig. 2 show that the liquid crystal display panel 20 includes a color film substrate 210, an array substrate 220, and a liquid crystal layer 230, and the liquid crystal layer 230 is sandwiched between the color film substrate 210 and the array substrate 220. The color filter substrate 210 includes a first substrate 211, a black matrix layer 212, a color resist layer 213, and a first planarization layer 214. The array substrate 220 includes a second substrate 221, a first prism structure 222, a second planarization layer 223, a common electrode layer 224, a second insulating layer 225, and a pixel electrode layer 226, and further includes a thin film transistor array layer (not shown in fig. 1 and 2) between the second substrate 221 and the first prism structure 222. Optionally, with continued reference to FIG. 1 and FIG. 2, the display device may include a brightness enhancement film 60 to increase the brightness of the front view.

In this embodiment, the first prism structures 222 are arranged on the second substrate 221 in an array, and top ends of the first prism structures 222 face the liquid crystal layer 230 and bottom surfaces thereof face away from the liquid crystal layer 230. The refractive index of the second planarization layer 223 is greater than the refractive index of the first prism structure 222. Since light rays enter the light hydrophobic material from the light dense material, the light rays will exit at a position deviated from the normal, and thus pass through the prism surface of the first prism structure 222, the brightness of the display device in the wide viewing angle mode is increased, thereby increasing the display effect of the display device in the wide viewing angle mode. It should be noted that the cross-sectional shape of the first prism structure 222 may be triangular or trapezoidal, or may be semicircular, which is not limited herein.

Specifically, the backlight module 10 is used for providing a light source for the liquid crystal display panel 20, and the type thereof may be a direct type, a side type, or other types known to those skilled in the art, and is not limited herein.

Specifically, the privacy film 30 is used to reduce the exit angle of light passing through the privacy film 30, in other words, the light with a large angle is changed into light with a small angle, where the light with a large angle refers to the maximum value of the angle between the light in the light beam and the vertical direction (referred to as a first angle) being larger, that is, the light ratio is relatively divergent, and the light with a small angle refers to the maximum value of the angle between the light in the light beam and the vertical direction (referred to as a second angle) being smaller, that is, the light ratio is relatively convergent, where the vertical direction refers to the direction perpendicular to the plane of the liquid crystal display panel 20, and the specific values of the first angle and the second angle can be set by those skilled in the art according to the actual situation, and are not limited herein. Specifically, privacy film 30 may include a louvered film, or other privacy film 30 of a type known to those skilled in the art, without limitation. The specific arrangement position of the privacy film 30 in the display device can be set by a person skilled in the art according to practical situations, and is not limited herein, so that the privacy film 30 is located between the polymer liquid crystal layer 43 of the viewing angle switching film 40 and the backlight module 10. Illustratively, the privacy film 30 is located between the liquid crystal display panel 20 and the first electrode 41 (as shown in fig. 1), or the privacy film 30 is located between the liquid crystal display panel 20 and the backlight module 10 (as shown in fig. 2).

Specifically, the viewing angle switching film 40 includes a first electrode 41, a second electrode 42, and a Polymer Liquid Crystal layer 43 sandwiched between the first electrode 41 and the second electrode 42, wherein the Polymer Liquid Crystal layer 43 includes Polymer Dispersed Liquid Crystal (PDLC), which is Liquid Crystal Dispersed in micro-droplets in an organic solid Polymer matrix. Optionally, with continuing reference to fig. 1 and fig. 2, the display device may further include a first substrate 51 and a second substrate 52, wherein the first electrode 41 is located on the first substrate 51, and the second electrode 42 is located on the second substrate 52, so as to achieve the effect that the first substrate 51 and the second substrate 52 protect and support the viewing angle switching film 40. Specifically, the specific embodiments of the first electrode 41 and the second electrode 42 can be set by those skilled in the art according to practical situations, and are not limited herein. For example, the first electrode 41 may be provided as a whole-surface electrode, the second electrode 42 may be provided as a plurality of independent block-shaped electrodes (as shown in fig. 1 and fig. 2), the second electrode 42 may be provided as a whole-surface electrode, the first electrode 41 may be provided as a plurality of independent block-shaped electrodes, the first electrode 41 and the second electrode 42 may be provided as a plurality of independent block-shaped electrodes, and the plurality of first electrodes 41 and the plurality of second electrodes 42 may be in one-to-one correspondence.

Fig. 3 is a schematic view illustrating a film for switching a viewing angle when light passes through according to an embodiment of the present invention. Fig. 4 is a schematic view of another light ray passing through the viewing angle switching film according to the embodiment of the present invention. The principle of the viewing angle switching film 40 for realizing the switching between the wide viewing angle mode and the narrow viewing angle mode is as follows: as shown in fig. 3, when the voltage difference between the first electrode 41 and the second electrode 42 is the first voltage difference, the polymer liquid crystal layer 43 is in a transparent state, the polymer liquid crystal layer 43 has a transmission function and does not have a diffusion function, and light with a small angle still passes through the polymer liquid crystal layer 43, so that the display device is in a narrow viewing angle mode; as shown in fig. 4, when the voltage difference between the first electrode 41 and the second electrode 42 is the second voltage difference, the polymer liquid crystal layer 43 is in a fog state, and the polymer liquid crystal layer 43 has a diffusion function, so that light with a small angle can be changed into light with a large angle, thereby enabling the display device to be in a wide viewing angle mode. It should be noted that specific values of the first voltage difference and the second voltage difference can be set by those skilled in the art according to practical situations, and are not limited herein. It can be understood that the haze of the polymer liquid crystal layer 43 in the foggy state is related to the specific value of the second voltage difference, and the haze of the polymer liquid crystal layer 43 can be adjusted by adjusting the specific value of the second voltage difference, so as to adjust the light diffusion capability of the viewing angle switching film 40. It can also be understood that, since the number of the first electrodes 41 and/or the second electrodes 42 is plural, the voltage difference between the first electrodes 41 and the second electrodes 42 can be controlled in a divisional manner, so as to achieve the effect of preventing peeping in a divisional manner, which areas are in the wide viewing angle mode, which areas are in the narrow viewing angle mode, which can be set by those skilled in the art according to practical situations, and is not limited herein. For example, the keyboard input area may be set to a narrow viewing angle mode, and the other areas may be set to a wide viewing angle mode, and the upper half area of the display device may be set to the narrow viewing angle mode, and the lower half area of the display device may be set to the wide viewing angle mode.

The above-described display device has a function of displaying with the viewing angle switching film 40 in addition to a function of freely switching between the narrow viewing angle mode and the wide viewing angle mode. The specific principle of the viewing angle switching film 40 is as follows: when no voltage is applied to the first electrode 41 and the second electrode 42, the polymer liquid crystal layer 43 is in a milky white state, and when the voltage difference between the first electrode 41 and the second electrode 42 is the first voltage difference, the polymer liquid crystal layer 43 is in a transparent state. The backlight module 10 is turned off, and then black and white display can be realized by controlling the voltage difference between the first electrode 41 and the second electrode 42 in some regions to be the first voltage difference and applying no voltage between the first electrode 41 and the second electrode 42 in the other regions. For example, fig. 5 is a schematic diagram of a display device according to an embodiment of the present invention, which performs black-and-white display by using a viewing angle switching film.

It should be noted that the pixel density of the display device using the viewing angle switching film 40 to perform black-and-white display is related to the distribution density of the first electrode 41 and the second electrode 42, and those skilled in the art can set the distribution density and the specific distribution of the first electrode 41 and the second electrode 42 according to actual situations, and the present invention is not limited herein.

It should be noted that how to control whether or not to apply a voltage to the first electrode 41 and the second electrode 42, and by what kind of device to apply a voltage to the first electrode 41 and the second electrode 42, a person skilled in the art can set the method according to actual situations, and the method is not limited herein. For example, fig. 6 is a schematic structural diagram of a control chip providing a voltage to a second electrode according to an embodiment of the present invention. Referring to fig. 6, the display device further includes a control chip (not shown in fig. 6), and the first electrode 41 (not shown in fig. 6) and the second electrode 42 are electrically connected to the control chip. Specifically, the control chip includes a gate control circuit and a voltage output circuit, a plurality of gate control signal output ends of the gate control circuit are electrically connected to the first signal lines 71 in a one-to-one correspondence, and gates of the switching transistors 73 electrically connected to the second electrodes 42 in the same row are connected to the same first signal line 71; the plurality of voltage signal output terminals of the voltage output circuit are electrically connected to the second signal lines 72 in a one-to-one correspondence, the first poles of the switching transistors 73 electrically connected to the second electrodes 42 in the same column are connected to the same second signal line 72, and the second poles of the switching transistors 73 are electrically connected to the second electrodes 42. Alternatively, the specific arrangement positions of the switching transistor 73, the first signal line 71 and the second signal line 72 may be set by those skilled in the art according to actual situations, and are not limited herein. For example, the switching transistor 73, the first signal line 71, and the second signal line 72 may be integrated in a control chip, may be disposed on the same circuit board as the control chip, and may be formed on the second substrate 52 or the first substrate 51. It can be understood that, when the first electrode 41 is a block electrode, the connection manner between the first electrode and the control chip is similar to that of the second electrode 42, and the description is omitted here; when the first electrode 41 is a planar electrode, it is sufficient that it is connected to a common voltage signal terminal of the control chip.

The embodiment of the utility model provides a display device, through addding visual angle switching film 40, visual angle switching film 40 includes first electrode 41, second electrode 42 and polymer liquid crystal layer 43, wherein, polymer liquid crystal layer 43 changes between transparent state and fog-state according to the voltage difference between first electrode 41 and second electrode 42, make when polymer liquid crystal layer 43 is transparent state, polymer liquid crystal layer 43 does not have the effect of breaking up light, the light of small angle still is the light of small angle behind passing polymer liquid crystal layer 43, thereby make display device be in narrow visual angle mode; when the polymer liquid crystal layer 43 is in a foggy state, the polymer liquid crystal layer 43 has an effect of scattering light, and can change light with a small angle into light with a large angle, so that the display device is in a wide viewing angle mode, the problem that switching of wide and narrow viewing angles cannot be realized in the prior art is solved, free switching between the narrow viewing angle mode and the wide viewing angle mode is realized, and the power consumption effect is not increased.

Fig. 7 is a schematic structural view of a peep-proof membrane provided in an embodiment of the present invention. Referring to fig. 7, the privacy film 30 includes light-shielding bars 31 and light-transmitting bars 32 alternately arranged in a second direction X1 extending in a first direction Y1; wherein the first direction Y1 and the second direction X1 intersect.

Specifically, the materials and sizes of the light-shielding strip 31 and the light-transmitting strip 32 can be set by those skilled in the art according to practical situations, and are not limited herein. For example, the material of the light-shielding strip 31 may be black resin, the material of the light-transmitting strip 32 may be transparent resin, and the light-shielding strip 31 and the light-transmitting strip 32 have the same size.

It can be understood that, by arranging the privacy film 30 to include the light-shielding strips 31 and the light-transmitting strips 32 which are alternately arranged, the privacy film 30 can have a simple structure, which is beneficial to reducing the cost.

Fig. 8 is a schematic structural view of another anti-peeping membrane provided in the embodiment of the present invention. Referring to fig. 8, the privacy film 30 includes a plurality of privacy zones 30Z, each privacy zone 30Z including light-shielding stripes 31 and light-transmitting stripes 32 extending in the first direction Y1 and alternately arranged in the second direction X1, and light-shielding stripes 31 and light-transmitting stripes 32 extending in the second direction X1 and alternately arranged in the first direction Y1; wherein the first direction Y1 and the second direction X1 intersect.

It is understood that the display device can be peeped in multiple directions by arranging the peep-proof film 30 to include the light-shielding bars 31 (light-transmitting bars 32) extending in two different directions, and the specific peep-proof direction can be set by those skilled in the art according to actual situations, and is not limited herein. Illustratively, the peep-proof device can be arranged in four directions, namely an upper direction, a lower direction, a left direction and a right direction.

Fig. 9 is a schematic structural diagram of another display device according to an embodiment of the present invention. Fig. 10 is a schematic view of a structure of the reflection film and the peep-proof film in fig. 9. Fig. 11 is a cross-sectional view along AA' of fig. 10. Referring to fig. 9 to 11, the display device may further include a reflective film 80, and the reflective film 80 may include a reflective bar 81 disposed on a side of the light-shielding bar 31 facing the liquid crystal display panel 20.

Specifically, the material and size of the reflective strips 81 can be set by those skilled in the art according to practical situations, and are not limited herein. For example, the orthographic projection of the reflective stripes 81 on the first substrate 51 may fall within the orthographic projection of the light-shielding stripes 31 on the first substrate 51, and the orthographic projection of the reflective stripes 81 on the first substrate 51 may also coincide with the orthographic projection of the light-shielding stripes 31 on the first substrate 51 (as shown in fig. 10 and 11). It can be understood that when the orthographic projection of the reflective strips 81 on the first substrate 51 is overlapped with the orthographic projection of the light-shielding strips 31 on the first substrate 51, the reflective strips 81 have a larger reflective area and have a stronger reflective capability to the ambient light.

It is also understood that when black and white display is performed using the viewing angle switching film 40, the reflection bar 81 may increase reflection of ambient light so that the brightness contrast of the area displaying black and the area displaying white is more apparent, thereby enhancing the display effect.

Fig. 12 is a schematic structural diagram of a black matrix according to an embodiment of the present invention. Referring to fig. 12, alternatively, the liquid crystal display panel 20 includes a black matrix including horizontal light-shielding stripes 2121 extending in the third direction Y2 and arranged in the fourth direction X4, and vertical light-shielding stripes 2122 extending in the fourth direction X4 and arranged in the third direction Y2, the horizontal light-shielding stripes 2121 and the vertical light-shielding stripes 2122 crossing to form a grid shape; the horizontal shading strips 2121 and the vertical shading strips 2122 are rectangular.

Specifically, the material and size of the black matrix can be set by those skilled in the art according to practical situations, and are not limited herein. Illustratively, the material of the black matrix may be black resin.

Specifically, the first direction Y1 and the third direction Y2 may or may not be parallel, and the second direction X1 and the fourth direction X4 may or may not be parallel. Preferably, when the light-shielding bars 31 and the light-transmitting bars 32 are rectangular, neither the first direction Y1 nor the second direction X1 is parallel to the third direction Y2, and neither the first direction Y1 nor the second direction X1 is parallel to the fourth direction X4. Therefore, the interference effect with the black matrix can be weakened, and the display effect of the display device can be enhanced.

Fig. 13 is a schematic structural view of another peep-proof membrane provided in an embodiment of the present invention. Fig. 14 is a schematic structural view of another peep-proof membrane provided in an embodiment of the present invention. Referring to fig. 13 and 14, the light-shielding bars 31 and the light-transmitting bars 32 are optionally in a wave shape (as shown in fig. 13) or a zigzag shape (as shown in fig. 14).

Specifically, the number of the wave structures 33 provided on each light shielding strip 31 (light transmitting strip 32) and the size of each wave structure 33 can be set by those skilled in the art according to practical situations, and are not limited herein. The number of the fold line structures 34 on each light shielding strip 31 (light transmitting strip 32) and the size of each fold line structure 34 can be set by those skilled in the art according to the actual situation, and are not limited herein. When the light-shielding strips 31 have a wave shape or a broken line shape, the extending direction thereof refers to the general direction of the light-shielding strips 31, or the arrangement direction of the wave structures 33 (broken line structures 34) in the same light-shielding strips 31, and the same applies to the light-transmitting strips 32. It should be noted that fig. 13 and 14 only exemplarily show that the light-shielding bars 31 and the light-transmitting bars 32 have different sizes, but the present invention is not limited thereto, and for example, the light-shielding bars 31 and the light-transmitting bars 32 may be set to have the same size.

It is understood that the horizontal light-shielding strips 2121 and the vertical light-shielding strips 2122 in the black matrix are generally rectangular, and the light-shielding strips 31 in the privacy film 30 are arranged in a wave shape or a fold line shape, so that even if the extending direction of the light-shielding strips 31 is parallel to the extending direction of the vertical light-shielding strips 2122 or the horizontal light-shielding strips 2121, the interference effect with the black matrix can be reduced, and the display effect of the display device can be enhanced.

It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious modifications, rearrangements, combinations and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the scope of the present invention.

Claims

1. A display device comprises a liquid crystal display panel and a backlight module; the liquid crystal display panel is characterized by further comprising a peep-proof film and a visual angle switching film, wherein the visual angle switching film is positioned on one side of the liquid crystal display panel, which is far away from the backlight module, and the peep-proof film is positioned on one side of the visual angle switching film, which faces the backlight module;

the viewing angle switching film includes: the liquid crystal display panel comprises a first electrode, a second electrode and a polymer liquid crystal layer, wherein the first electrode and the second electrode are oppositely arranged, and the polymer liquid crystal layer is positioned between the first electrode and the second electrode; the first electrode is positioned on one side of the second electrode facing the liquid crystal display panel; wherein the number of the first electrode and/or the second electrode is plural.

2. The display device according to claim 1, wherein the privacy film is positioned between the liquid crystal display panel and the first electrode.

3. The display device according to claim 2, wherein the privacy film comprises light-shielding stripes and light-transmitting stripes alternately arranged in a second direction extending in a first direction; wherein the first direction and the second direction intersect.

4. The display device according to claim 2, wherein the privacy film comprises a plurality of privacy zones, each privacy zone comprising light-shielding stripes and light-transmitting stripes alternately arranged in a second direction extending in the first direction, and the light-shielding stripes and the light-transmitting stripes alternately arranged in the first direction extending in the second direction;

wherein the first direction and the second direction intersect.

5. The display device according to claim 3 or 4, wherein the display device further comprises a reflective film including reflective stripes provided on a side of the light-shielding stripes facing away from the liquid crystal display panel.

6. The display device according to claim 3 or 4, wherein the liquid crystal display panel comprises a black matrix, the black matrix comprises horizontal light-shielding strips extending along a third direction and arranged along a fourth direction, and vertical light-shielding strips extending along the fourth direction and arranged along the third direction, and the horizontal light-shielding strips and the vertical light-shielding strips intersect to form a grid;

the horizontal shading strips and the vertical shading strips are rectangular.

7. The display device according to claim 6, wherein the light-shielding bars and the light-transmitting bars are rectangular;

8. The display device according to claim 6, wherein the light-shielding bars and the light-transmitting bars are in a wave shape or a broken line shape.

9. The display device according to claim 1, wherein the privacy film is positioned between the liquid crystal display panel and the backlight module.

10. The display device according to claim 1, wherein the display device further comprises a control chip, and wherein the first electrode and the second electrode are electrically connected to the control chip.