CN113281926A

CN113281926A - Display module and display device

Info

Publication number: CN113281926A
Application number: CN202110546941.5A
Authority: CN
Inventors: 苏世虎; 王徐鹏
Original assignee: Shanghai AVIC Optoelectronics Co Ltd
Current assignee: Shanghai AVIC Optoelectronics Co Ltd
Priority date: 2021-05-19
Filing date: 2021-05-19
Publication date: 2021-08-20
Anticipated expiration: 2041-05-19
Also published as: CN113281926B

Abstract

The invention discloses a display module and a display device, belonging to the technical field of display, wherein the display module comprises a backlight module, a display panel and at least one layer of visual angle control membrane, the visual angle control membrane is arranged between the backlight module and the display panel through a membrane folding and unfolding assembly, and comprises a first visual angle membrane and a second visual angle membrane; in the wide-viewing-angle display mode of the display module, the film folding and unfolding component controls the viewing-angle control film to move, and the first viewing-angle film is overlapped with the display area in the direction vertical to the light-emitting surface of the display panel; in the narrow viewing angle display mode, the film folding and unfolding component controls the viewing angle control film to move, and the second viewing angle film is overlapped with the display area in the direction perpendicular to the light emergent surface of the display panel. The display device comprises the display module. The invention can realize the flexible switching between the wide visual angle display mode and the narrow visual angle display mode of the display module, and has simple structure and convenient operation.

Description

Display module and display device

Technical Field

The invention relates to the technical field of display, in particular to a display module and a display device.

Background

With the continuous progress of display technology, the viewing angle of the display can reach more than 80 degrees, and a large viewing angle becomes the mainstream development direction of the liquid crystal display. For example, wide-angle portable electronic devices such as notebook computers, personal digital assistants, tablet computers, and mobile phones all use large-angle technology, so that people can see complete and undistorted pictures when watching wide-angle displays from different directions. However, people enjoy the visual experience brought by a large viewing angle, and also want to avoid that all viewing angles can view the display content in some application scenes, and at this time, the display needs to be switched to a narrow viewing angle for use. For example, some display devices in the cabin of a car of an on-board display system, display devices for displaying the position of a passenger in the cabin and display devices for entertainment are undesirable for a driver to see information on such display devices due to safety requirements during normal driving, thereby preventing driver from distracting and causing driving safety accidents.

However, such display screens in existing vehicle cabins either allow a driver to see the information on the passenger driving position display device when the display device is turned on, or prevent the driver from seeing the information on the passenger driving position display device as long as the driver is in the driving position. At present, a narrow viewing angle film is arranged on a display in a narrow viewing angle mode to realize a narrow viewing angle, but the viewing angle switching mode is inconvenient, the narrow viewing angle film needs to be taken down in the wide viewing angle mode, and the narrow viewing angle film needs to be reinstalled in the narrow viewing angle mode, so that the narrow viewing angle film is complex to operate, is not suitable for being applied to special application scenes such as vehicle-mounted display and the like, and can not flexibly and conveniently switch the wide and narrow viewing angle between a driving state and a parking rest state according to the actual state of an automobile, and the using satisfaction degree of a user is improved.

Therefore, it is an urgent technical problem to provide a display module and a display device which have simple structure, can realize flexible switching between a wide viewing angle and a narrow viewing angle, and are convenient to operate.

Disclosure of Invention

In view of this, the present invention provides a display module and a display device, so as to solve the problems in the prior art that a view angle switching device has a complicated structure, a wide view angle and a narrow view angle cannot be flexibly switched, and the operation is complicated.

The invention discloses a display module, which comprises a backlight module and a display panel which are oppositely arranged, wherein the display panel comprises a display area; the backlight module comprises a shell, a light source component and an optical diaphragm, wherein the light source component and the optical diaphragm are positioned in an accommodating space formed by the shell; the display module also comprises at least one layer of visual angle control membrane, the visual angle control membrane is arranged between the backlight module and the display panel through the membrane folding and unfolding component, and the membrane folding and unfolding component is fixed in the shell; the visual angle control film comprises a first visual angle film and a second visual angle film; the display module comprises a wide visual angle display mode and a narrow visual angle display mode; in a wide viewing angle display mode, the film folding and unfolding component controls the viewing angle control film to move, and the first viewing angle film is overlapped with the display area in a direction perpendicular to the light emergent surface of the display panel; in the narrow viewing angle display mode, the film folding and unfolding component controls the viewing angle control film to move, and the second viewing angle film is overlapped with the display area in the direction perpendicular to the light emergent surface of the display panel.

Based on the same invention concept, the invention also discloses a display device which comprises the display module.

Compared with the prior art, the display module and the display device provided by the invention at least realize the following beneficial effects:

the display module comprises a backlight module and a display panel which are oppositely arranged, and further comprises at least one layer of visual angle control membrane, wherein the visual angle control membrane is arranged between the backlight module and the display panel through a membrane folding and unfolding assembly, and the membrane folding and unfolding assembly is fixed in a shell of the backlight module and used for being connected with the visual angle control membrane and controlling the movement of the visual angle control membrane. The visual angle control film at least comprises a first visual angle film and a second visual angle film, the first visual angle film can be a wide visual angle film or a normal visual angle film, the second visual angle film can be a narrow visual angle film, and the light emitting angle of light passing through the first visual angle film is larger than that of light passing through the second visual angle film. The display module comprises a wide viewing angle display mode and a narrow viewing angle display mode, wherein in the wide viewing angle display mode, the film folding and unfolding component controls the viewing angle control film to move, so that the first viewing angle film is overlapped with the display area in a direction vertical to the light-emitting surface of the display panel; under narrow visual angle display mode, the diaphragm is received and is expanded subassembly control visual angle control diaphragm and remove, on the direction that perpendicular to display panel goes out the plain noodles, makes second visual angle diaphragm and display area overlap to can receive and expand the removal of subassembly control visual angle control diaphragm through the diaphragm, realize the nimble switching of display module's wide visual angle display mode and narrow visual angle display mode, simple structure, convenient operation.

Of course, it is not necessary for any product in which the present invention is practiced to specifically achieve all of the above-described technical effects simultaneously.

Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.

Fig. 1 is a schematic cross-sectional view of a display module according to an embodiment of the invention;

fig. 2 is a schematic cross-sectional view of a display module according to an embodiment of the invention;

FIG. 3 is a schematic view of the film roll-out assembly of FIGS. 1 and 2 controlling the movement of the viewing angle control film;

FIG. 4 is a schematic cross-sectional view of a viewing angle control film according to an embodiment of the present invention;

FIG. 5 is a schematic cross-sectional view of another viewing angle control film according to an embodiment of the present invention;

FIG. 6 is a schematic cross-sectional view of another viewing angle control film according to an embodiment of the present invention;

FIG. 7 is another schematic diagram of the film roll-out assembly of FIGS. 1 and 2 controlling the viewing angle to control the movement of the film;

fig. 8 is a schematic cross-sectional view of a display module according to an embodiment of the invention;

fig. 9 is a schematic cross-sectional view of a display module according to an embodiment of the invention;

fig. 10 is a schematic cross-sectional view of a display module according to an embodiment of the invention;

fig. 11 is a schematic cross-sectional view illustrating another display module according to an embodiment of the invention;

fig. 12 is a schematic cross-sectional view of a display module according to an embodiment of the invention;

FIG. 13 is a schematic cross-sectional view of another viewing angle control film according to an embodiment of the present invention;

fig. 14 is a schematic partial enlarged structural view of a light source module and an optical film in a backlight module according to an embodiment of the invention;

FIG. 15 is a schematic view of another enlarged partial structure of the light source module and the optical film in the backlight module according to the embodiment of the invention;

FIG. 16 is a schematic diagram of a second viewing angle film according to an embodiment of the present invention;

FIG. 17 is a schematic sectional view taken along line A-A' of FIG. 16;

FIG. 18 is a schematic diagram of another planar structure of a second viewing angle film according to an embodiment of the present invention;

FIG. 19 is a schematic sectional view taken along line B-B' of FIG. 18;

FIG. 20 is a schematic diagram of another planar structure of a second viewing angle film according to an embodiment of the present invention;

FIG. 21 is a schematic diagram of another planar structure of a second viewing angle film according to an embodiment of the present invention;

FIG. 22 is a schematic cross-sectional view taken along line C-C' of FIG. 21;

fig. 23 is a schematic cross-sectional view of a display module according to an embodiment of the invention;

fig. 24 is a schematic cross-sectional view of a display module according to an embodiment of the invention;

fig. 25 is a schematic structural diagram of a display device provided by an embodiment of the present invention.

Detailed Description

Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.

The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.

In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

Referring to fig. 1 to fig. 3 in combination, fig. 1 is a schematic cross-sectional structure of a display module according to an embodiment of the present invention, fig. 2 is a schematic cross-sectional structure of another display module according to an embodiment of the present invention (it can be understood that the cross-sectional directions of fig. 1 and fig. 2 are the same as the moving direction of the viewing angle control film), fig. 3 is a schematic principle diagram of the film extending and retracting assembly in fig. 1 and fig. 2 controlling the movement of the viewing angle control film, and a display module 000 according to an embodiment includes: the backlight module 10 and the display panel 20 are oppositely arranged, and the display panel 20 comprises a display area AA;

the backlight module 10 includes a housing 101, a light source assembly 102 and an optical film 103, wherein the light source assembly 102 and the optical film 103 are located in an accommodating space formed by the housing 101;

the display module 000 further includes at least one layer of viewing angle control film 30, the viewing angle control film 30 is disposed between the backlight module 10 and the display panel 20 through the film folding and unfolding assembly 40, and the film folding and unfolding assembly 40 is fixed in the housing 101;

the viewing angle controlling film 30 includes a first viewing angle film 301 and a second viewing angle film 302;

the display module 000 includes a wide viewing angle display mode (as shown in fig. 1) and a narrow viewing angle display mode (as shown in fig. 2);

in the wide viewing angle display mode, the film expanding and contracting assembly 40 controls the viewing angle control film 30 to move, so that the first viewing angle film 301 overlaps the display area AA in a direction Z perpendicular to the light-emitting surface of the display panel 20;

in the narrow viewing angle display mode, the film expanding/contracting assembly 40 controls the viewing angle control film 30 to move, so that the second viewing angle film 302 overlaps the display area AA in a direction Z perpendicular to the light emitting surface of the display panel 20.

Specifically, the display module 000 provided in this embodiment includes a backlight module 10 and a display panel 20 that are disposed opposite to each other, and optionally, the display panel 20 of this embodiment may be a liquid crystal display panel, and the liquid crystal display panel itself does not emit light, and the working principle of the display module is to apply a driving voltage to a color film substrate and an array substrate (not shown in the figure) of the liquid crystal display panel to control the rotation of liquid crystal molecules of a liquid crystal layer, change the polarization state of light of the backlight module 10, and control the light transmission amount by implementing the penetration and blocking of a light path through upper and lower polarizers disposed outside the liquid crystal display panel, and finally refract the light of the backlight module 10 to generate a display image. Optionally, the backlight module 10 of the present embodiment may be any one of a side-in type backlight module and a direct type backlight module, and it is understood that fig. 1 and fig. 2 of the present embodiment only illustrate the technical solution that the backlight module 10 is an example of a direct type backlight module. The display panel 20 of the embodiment at least includes a display area AA, the backlight module 10 includes a housing 101, a light source assembly 102 and an optical film 103, wherein the light source assembly 102 and the optical film 103 are located in an accommodating space formed by the housing 101, it can be understood that when the backlight module 10 is a direct-type backlight module, the optical film 103 may include a reflector, a diffuser, and the like, and when the backlight module 10 is a side-type backlight module, the optical film 103 may further include a light guide plate. The structure of the backlight module 10 and the structure of the display panel 20 are not particularly limited in this embodiment, and in the specific implementation, the structure of the liquid crystal display panel and the backlight module in the related art can be referred to for understanding.

The display module 000 further includes at least one layer of viewing angle control film 30, the viewing angle control film 30 is disposed between the backlight module 10 and the display panel 20 through the film folding and unfolding assembly 40, and the film folding and unfolding assembly 40 is fixed in the housing 101 and is used for being connected to the viewing angle control film 30 to control the movement of the viewing angle control film 30. The view control film 30 includes a first view film 301 and a second view film 302, optionally, the first view film 301 may be a wide view film or a normal view film, and the second view film 302 may be a narrow view film, so that the light angle of the light emitted from the second view film 302 is less than or equal to 50 degrees, and it is sufficient that the light angle of the light passing through the first view film 301 is greater than the light angle of the light passing through the second view film 302. Further optionally, the first viewing angle film 301 and the second viewing angle film 302 are arranged along the moving direction X of the viewing angle controlling film 30, so that the viewing angle switching function of the display module 000 according to this embodiment can be realized by controlling the film folding and unfolding assembly 40.

The display module 000 of the present embodiment includes a wide viewing angle display mode and a narrow viewing angle display mode, and in the wide viewing angle display mode (as shown in fig. 1), the film expanding/contracting assembly 40 controls the viewing angle control film 30 to move (the moving direction is shown as a direction X in fig. 1), so that the first viewing angle film 301 overlaps with the display area AA in a direction Z perpendicular to the light emitting surface of the display panel 20, and optionally, the first viewing angle film 301 overlaps with the display area AA; in the narrow viewing angle display mode (as shown in fig. 2), the film folding and unfolding assembly 40 controls the viewing angle control film 30 to move (the moving direction is shown as a direction X in fig. 2), and in a direction Z perpendicular to the light emitting surface of the display panel 20, the second viewing angle film 302 is overlapped with the display area AA, optionally, the second viewing angle film 302 is overlapped with the display area AA, so that the film folding and unfolding assembly 40 can control the movement of the viewing angle control film 30, thereby realizing the flexible switching between the wide viewing angle display mode and the narrow viewing angle display mode of the display module 000, and being convenient to operate.

Optionally, the film folding and unfolding assembly 40 of this embodiment is connected with a driving motor (not shown in the figure), and may be a stepping micro motor, and the film folding and unfolding assembly 40 is controlled by the driving motor, so that the film folding and unfolding assembly 40 can drive the movement of the view angle control film 30, and the switching of the wide and narrow view angles is realized. In this embodiment, the connection mode between the driving motor and the film folding and unfolding assembly 40 is not particularly limited, and only the film folding and unfolding assembly 40 needs to be controlled to realize the movement of the viewing angle control film 30.

The display module 000 of the embodiment may also be applied to a vehicle-mounted display system, for example, when a vehicle is running, or a vehicle gear is located in a non-parking gear, the film folding and unfolding assembly 40 is controlled by a background control unit (such as a driving motor, not shown in the figure) of the display module 000, and the film folding and unfolding assembly 40 controls the viewing angle control film 30 to move, so that in a direction Z perpendicular to a light emitting surface of the display panel 20, the second viewing angle film 302 overlaps with the display area AA, that is, the narrow viewing angle film overlaps with the display area AA, at this time, a visible angle of the display module on the passenger side is outside a visible angle range of the passenger, which may prevent display on the passenger side from interfering with the passenger, and ensure driving safety. When the automobile stops or the gear is in the parking gear, the film folding and unfolding assembly 40 can be controlled by a background control unit (such as a driving motor, not shown in the figure) of the display module 000, and the film folding and unfolding assembly 40 controls the visual angle control film 30 to move, so that in the direction Z perpendicular to the light emitting surface of the display panel 20, the first visual angle film 301 is overlapped with the display area AA, namely, the wide visual angle or normal visual angle film is overlapped with the display area AA, at the moment, the visual angle of the display module on the secondary driving side is within the visual angle range of the driver, the driver can see the information on the display module on the secondary driving side, and the use satisfaction of the user is further improved.

It should be noted that, in this embodiment, the structure of the film folding and unfolding assembly 40 is not specifically limited, and in the specific implementation, the structure of the film folding and unfolding assembly 40 can be designed according to actual requirements, and only the connection between the film folding and unfolding assembly 40 and the viewing angle control film 30 needs to be satisfied, and the viewing angle control film 30 can be driven to move in the moving direction X in fig. 1 and fig. 2, so that the first viewing angle film 301 overlaps the display area AA in the wide viewing angle display mode, and the second viewing angle film 301 overlaps the display area AA in the narrow viewing angle display mode, and the viewing angles can be flexibly switched.

In some optional embodiments, please refer to fig. 1-3 and 4-6 in combination, fig. 4 is a schematic cross-sectional structure diagram of a viewing angle control film provided in an embodiment of the present invention, fig. 5 is a schematic cross-sectional structure diagram of another viewing angle control film provided in an embodiment of the present invention, fig. 6 is a schematic cross-sectional structure diagram of another viewing angle control film provided in an embodiment of the present invention (it can be understood that the cross-sectional direction of the viewing angle control film of fig. 4-6 is the same as the moving direction of the viewing angle control film), in this embodiment, a first viewing angle film 301 and a second viewing angle film 302 (shown in different patterns for filling distinction) are arranged along the moving direction X of the viewing angle control film 30;

optionally, as shown in fig. 4, the first viewing angle film 301 and the second viewing angle film 302 are of an integrally formed film structure, that is, the same viewing angle control film 30 is processed, so that the first viewing angle film 301 with a wide viewing angle/a normal viewing angle and the second viewing angle film 302 with a narrow viewing angle can be formed in different areas, and thus, the thickness of the viewing angle control film 30 can be reduced.

Optionally, as shown in fig. 5, the viewing angle control film 30 includes a first transparent flexible substrate 300, and the first viewing angle film 301 and the second viewing angle film 302 are located on the same side of the first transparent flexible substrate 300, that is, the prefabricated first viewing angle film 301 with a wide viewing angle/a normal viewing angle and the second viewing angle film 302 with a narrow viewing angle may be attached to the same first transparent flexible substrate 300, so as to facilitate reducing the difficulty in processing the viewing angle control film 30.

Optionally, as shown in fig. 6, the view control film 30 may include a first view film 301 and a second view film 302 that are connected to each other, so that the view control film 30 of the whole structure may be directly formed by directly connecting the prefabricated first view film 301 with a wide view angle and a normal view angle and the prefabricated second view film 302 with a narrow view angle, which may not only simplify the process and reduce the process difficulty, but also facilitate the reduction of the film thickness.

In some optional embodiments, please refer to fig. 1-3 and 7 in combination, fig. 7 is another schematic diagram of the viewing angle controlling film movement controlled by the film folding and unfolding assembly shown in fig. 1 and 2, in this embodiment, the viewing angle controlling film 30 may include a first viewing angle film 301 and a second viewing angle film 302 connected to each other, a film folding and unfolding force-receiving portion 303 is included between the first viewing angle film 301 and the second viewing angle film 302, one end of the film folding and unfolding force-receiving portion 303 is connected to the first viewing angle film 301, and the other end of the film folding and unfolding force-receiving portion 303 is connected to the second viewing angle film 302; the optional film roll-out force portion 303 is more stretchable than the first viewing angle film 301 and the film roll-out force portion 303 is more stretchable than the second viewing angle film 302.

This embodiment explains that the first visual angle diaphragm 301 and the second visual angle diaphragm 302 of interconnect directly can also include the higher diaphragm of degree of stretching and take out the atress portion 303, the one end of diaphragm take out and take out the atress portion 303 is connected with first visual angle diaphragm 301, the other end and the second visual angle diaphragm 302 of diaphragm take out and take out the atress portion 303 and be connected, thereby can take out and take out the atress portion 303 through the higher diaphragm of degree of stretching and play the cushioning effect, avoid appearing the condition that the junction atress of first visual angle diaphragm 301 and second visual angle diaphragm 302 was broken, and then be favorable to protecting the display module assembly.

It can be understood that, in this embodiment, the materials of the first viewing angle membrane 301, the second viewing angle membrane 302, and the membrane folding and unfolding stress part 303 are not particularly limited, and all the materials need to be membrane materials, and the stretchability of the membrane folding and unfolding stress part 303 is greater than that of the first viewing angle membrane 301, and the stretchability of the membrane folding and unfolding stress part 303 is greater than that of the second viewing angle membrane 302.

In some optional embodiments, please refer to fig. 1 and fig. 2 in combination, the backlight module 10 of the present embodiment includes a light emitting area LA, and the light emitting area LA overlaps with the display area AA in a direction Z perpendicular to the light emitting surface of the display panel 20;

along the first direction X (i.e. the moving direction X of the viewing angle control film 30), the backlight module 10 further includes a first non-light-exiting region NLA1 and a second non-light-exiting region NLA2 located at two opposite sides of the light-exiting region LA;

the film take-up assembly 40 is located within the first non-light exiting zone NLA1 and the second non-light exiting zone NLA 2.

The embodiment explains that the backlight module 10 includes the light emitting area LA, and in the direction Z perpendicular to the light emitting surface of the display panel 20, the light emitting area LA overlaps with the display area AA, optionally, the areas of the light emitting area LA of the backlight module 10 and the display area AA of the display panel 20 may be substantially the same, and the light emitting area LA and the display area AA may be substantially overlapped, so that the waste of unnecessary light emitting area may be avoided, and the increase of the display area is facilitated. Along first direction X, that is, along moving direction X of viewing angle control diaphragm 30, backlight unit 10 further includes first non-light-exiting area NLA1 and second non-light-exiting area NLA2 located at two opposite sides of light-exiting area LA, optionally, first non-light-exiting area NLA1 and second non-light-exiting area NLA2 may correspond to non-display area NA of display panel 20, diaphragm folding and unfolding assembly 40 is located in first non-light-exiting area NLA1 and second non-light-exiting area NLA2, diaphragm folding and unfolding assembly 40 is disposed at the periphery of light-exiting area LA of backlight unit 10, so that in direction Z perpendicular to light-exiting surface of display panel 20, diaphragm folding and unfolding assembly 40 is located in non-display area NA range of display panel 20, and light-exiting effect of backlight unit 10 is avoided being affected.

In some alternative embodiments, please continue to refer to fig. 1-3, in this embodiment, the film take-up assembly 40 includes a first winding shaft 401 and a second winding shaft 402, the first winding shaft 401 and the second winding shaft 402 are respectively fixed at two opposite sides in the housing 101, the first winding shaft 401 is located in the first non-light-exiting area NLA1, and the second winding shaft 402 is located in the second non-light-exiting area NLA 2;

in the first direction X, a first reel 401 is connected to one end of the viewing angle control film 30, and a second reel 402 is connected to the other end of the viewing angle control film 30.

The embodiment explains that the film take-up assembly 40 may include at least a first winding shaft 401 and a second winding shaft 402, and the first winding shaft 401 and the second winding shaft 402 are respectively fixed in the first non-light-exiting area NLA1 and the second non-light-exiting area NLA2 on two opposite sides in the housing 101, so that the first winding shaft 401 and the second winding shaft 402 can be prevented from affecting the light-exiting effect of the backlight module 10. In the first direction X, the first winding shaft 401 is connected to one end of the viewing angle control film 30, the second winding shaft 402 is connected to the other end of the viewing angle control film 30, optionally, the first winding shaft 401 and the second winding shaft 402 may be respectively connected to a background control unit (such as a driving motor, not shown in the figure), and then the background control unit controls the first winding shaft 401 (or the background control unit controls the first winding shaft 401 and the second winding shaft 402 simultaneously) to rotate along the direction G1 in fig. 3, so that a narrow viewing angle display mode of the display module 000 is formed (i.e., shown in fig. 2), so that the second viewing angle film 302 overlaps the display area AA, and the first viewing angle film 301 that is not needed at this time may be wound on the first winding shaft 401. When the display module 000 needs to be switched to the wide viewing angle display mode, the second reel 402 (or the background control unit controls the first reel 401 and the second reel 402 simultaneously) may be controlled by the background control unit to rotate along the direction G2 in fig. 3, so that the wide viewing angle display mode of the display module 000 is formed (i.e. shown in fig. 1), and the first viewing angle film 301 is overlapped with the display area AA, and the second viewing angle film 302 that does not need to be used may be wound on the second reel 402, thereby completing the viewing angle switching function of the display module 000.

It can be understood that the first winding shaft 401 and the second winding shaft 402 can provide a certain tension to the film during the winding process, thereby ensuring the flatness of the film. The viewing angle control film 30 is made of a flexible material, and is wound on the first winding shaft 401 or the second winding shaft 402, so that the damage degree to the viewing angle control film is extremely small and can be ignored.

In some alternative embodiments, please continue to refer to fig. 1-2, in this embodiment, the film take-up assembly 40 includes a first winding shaft 401 and a second winding shaft 402, the first winding shaft 401 and the second winding shaft 402 are respectively fixed at two opposite sides in the housing 101, the first winding shaft 401 is located in the first non-light-exiting area NLA1, and the second winding shaft 402 is located in the second non-light-exiting area NLA 2; in the first direction X, a first reel 401 is connected to one end of the viewing angle control film 30, and a second reel 402 is connected to the other end of the viewing angle control film 30;

the diaphragm extending and retracting assembly 40 further includes a first guide shaft 403 and a second guide shaft 404, the first guide shaft 403 and the second guide shaft 404 are respectively fixed at two opposite sides in the housing 101, the first guide shaft 403 is located in the first non-light-exiting area NLA1, and the second guide shaft 404 is located in the second non-light-exiting area NLA 2;

in a direction Z perpendicular to the light emitting surface of the display panel 20, the first guide shaft 403 is located on a side of the first scroll 401 close to the display panel 20, and the second guide shaft 404 is located on a side of the second scroll 402 close to the display panel 20;

the first guide shaft 403 is used for guiding the first viewing angle film 301 to be wound on the first reel 401, and overlapping the second viewing angle film 302 with the light emergent area LA in a direction Z perpendicular to the light emergent surface of the display panel 20;

the second guiding shaft 404 is used to guide the second viewing angle film 302 to be wound on the second reel 402, and make the first viewing angle film 301 overlap with the light exiting area LA in the direction Z perpendicular to the light exiting surface of the display panel 20.

The embodiment further explains that the film roll-up assembly 40 may at least include a first reel 401, a second reel 402, a first guide shaft 403 and a second guide shaft 404, and the first reel 401, the first guide shaft 403 and the second reel 402, the second guide shaft 404 are respectively fixed in the first non-light-exiting area NLA1 and the second non-light-exiting area NLA2 on two opposite sides in the housing 101, so that the light-exiting effect of the backlight module 10 may be prevented from being affected by the arrangement of the film roll-up assembly 40. In the first direction X, a first reel 401 is connected to one end of the viewing angle control film 30, a second reel 402 is connected to the other end of the viewing angle control film 30, optionally, the first reel 401 and the second reel 402 may be respectively connected to a background control unit (e.g. a driving motor, not shown), further, the background control unit controls the first winding shaft 401 (or the background control unit controls the first winding shaft 401 and the second winding shaft 402 simultaneously) to rotate along the direction G1 in fig. 2, at this time, the first guiding shaft 403 guides the first viewing angle film 301 to wind on the first winding shaft 401, so that the viewing angle control film 30 has better tension when being unwound, improves flatness, and finally forms a narrow viewing angle display mode (i.e. as shown in fig. 2) of the display module 000, so that the second viewing angle film 302 moves to the light exiting area LA and overlaps the display area AA, the first viewing angle film 301 which is not used at this time may be wound around the first reel 401. When the display module 000 needs to be switched to the wide viewing angle display mode, the second reel 402 (or the background control unit controls the first reel 401 and the second reel 402 simultaneously) is controlled by the background control unit to rotate along the direction G2 in fig. 1, at this time, the second guide shaft 404 guides the second viewing angle film 302 to be wound on the second reel 402, so that the viewing angle control film 30 has better tension when being unfolded, and the flatness is improved, and finally, the wide viewing angle display mode (shown in fig. 1) of the display module 000 is formed, so that the first viewing angle film 301 moves into the light exit area LA range and is overlapped with the display area AA, at this time, the second viewing angle film 302 which does not need to be used can be wound on the second reel 402, and further, the viewing angle switching function of the display module 000 is better completed.

In some alternative embodiments, please continue to refer to fig. 1-2, in the embodiment, in the direction Z perpendicular to the light emitting surface of the display panel 20, a side of the first guide shaft 403 close to the display panel 20 is flush with a side of the second guide shaft 404 close to the display panel 20.

In the embodiment, it is further explained that in the direction Z perpendicular to the light emitting surface of the display panel 20, a side of the first guiding shaft 403 close to the display panel 20 is flush with a side of the second guiding shaft 404 close to the display panel 20, so that the viewing angle control film 30 is parallel to the light emitting surface at a side of the light emitting surface of the backlight module 10, and the display effect is prevented from being affected by tilting the viewing angle control film 30.

In some optional embodiments, please refer to fig. 8-10, fig. 8 is another schematic cross-sectional structure diagram of the display module provided in the embodiment of the present invention, fig. 9 is another schematic cross-sectional structure diagram of the display module provided in the embodiment of the present invention, fig. 10 is another schematic cross-sectional structure diagram of the display module provided in the embodiment of the present invention (it can be understood that the cross-sectional direction of fig. 8-10 is the same as the moving direction of the viewing angle control film), in the display module 000 provided in this embodiment, the film expanding and contracting assembly 40 at least includes a first transmission shaft 405, a second transmission shaft 406, a third transmission shaft 407, and a fourth transmission shaft 408, the first transmission shaft 405 and the second transmission shaft 406 are respectively fixed at opposite sides in the housing 101, and the third transmission shaft 407 and the fourth transmission shaft 408 are respectively fixed at opposite sides in the housing 101; the first transmission shaft 405 and the third transmission shaft 407 are located within the first non-light-exiting zone NLA1, and the second transmission shaft 406 and the fourth transmission shaft 408 are located within the second non-light-exiting zone NLA 2;

the viewing angle control film 30 surrounds the light source assembly 102 and the optical film 103 through a first transmission shaft 405, a second transmission shaft 406, a third transmission shaft 407 and a fourth transmission shaft 408;

the first transmission shaft 405, the second transmission shaft 406, the third transmission shaft 407, and the fourth transmission shaft 408 are configured to:

in the wide viewing angle display mode (as shown in fig. 8), the first viewing angle film 301 is transmitted between the backlight module 10 and the display panel 20, and in a direction Z perpendicular to the light emitting surface of the display panel 20, the first viewing angle film 301 is overlapped with the light emitting area LA, so that the first viewing angle film 301, the light emitting area LA, and the display area AA are overlapped, optionally, the first viewing angle film 301, the light emitting area LA, and the display area AA are substantially overlapped in the direction Z perpendicular to the light emitting surface of the display panel 20;

in the narrow viewing angle display mode (as shown in fig. 9), the second viewing angle film 302 is transmitted between the backlight module 10 and the display panel 20, and in a direction Z perpendicular to the light emitting surface of the display panel 20, the second viewing angle film 302 is overlapped with the light emitting area LA, so that the second viewing angle film 302, the light emitting area LA, and the display area AA are overlapped, optionally, the second viewing angle film 302, the light emitting area LA, and the display area AA are substantially overlapped in the direction Z perpendicular to the light emitting surface of the display panel 20.

In the display module 000 of the present embodiment, the film expanding and contracting assembly 40 at least includes the first transmitting shaft 405, the second transmitting shaft 406, the third transmitting shaft 407, and the fourth transmitting shaft 408, wherein in the first direction X (i.e. the moving direction of the viewing angle control film 30), the first transmitting shaft 405 and the third transmitting shaft 407 are located in the first non-light-exiting region NLA1 on the same side of the light-exiting region LA, and the second transmitting shaft 406 and the fourth transmitting shaft 408 are located in the second non-light-exiting region NLA2 on the other side of the light-exiting region LA, so as to prevent the arrangement of the first transmitting shaft 405, the second transmitting shaft 406, the third transmitting shaft 407, and the fourth transmitting shaft 408 from affecting the light-exiting effect of the backlight module 10. Optionally, as shown in fig. 8-10, in a direction Z perpendicular to the light emitting surface of the display panel 20, the first transmission shaft 405 is located between the third transmission shaft 407 and the display panel 20, the second transmission shaft 406 is located between the fourth transmission shaft 408 and the display panel 20, and one side of the first transmission shaft 405 close to the display panel 20 is flush with one side of the second transmission shaft 406 close to the display panel 20, so that when the viewing angle control film 30 moves between the backlight module 10 and the display panel 20, the viewing angle control film 30 is parallel to the light emitting surface of the backlight module 10, and the display effect is prevented from being affected by tilting the viewing angle control film 30.

The viewing angle control film 30 of the present embodiment may be a surrounding structure formed by connecting the first viewing angle film 301 and the second viewing angle film 302 end to end, and the viewing angle control film 30 surrounds the light source assembly 102 and the optical film 103 through the first transmission shaft 405, the second transmission shaft 406, the third transmission shaft 407, and the fourth transmission shaft 408, that is, the viewing angle control film 30 can move around the first transmission shaft 405, the second transmission shaft 406, the third transmission shaft 407, and the fourth transmission shaft 408.

When the display module 000 of this embodiment needs to be switched to the wide viewing angle display mode (as shown in fig. 8), the first transmission shaft 405 may be controlled by the background control unit (e.g., a driving motor) to rotate along a direction G3 in fig. 8, or the first transmission shaft 405, the second transmission shaft 406, the third transmission shaft 407, and the fourth transmission shaft 408 may be controlled by the background control unit (e.g., a driving motor) to rotate along a direction G3 in fig. 8 (clockwise in fig. 8), so as to transmit the first viewing angle film 301 between the backlight module 10 and the display panel 20, and in a direction Z perpendicular to the light emitting surface of the display panel 20, the first viewing angle film 301 overlaps with the light emitting area LA, so that the first viewing angle film 301, the light emitting area LA, and the display area AA overlap, and the wide viewing angle display effect of the display module 000 is achieved by the first viewing angle film 301 with a wide viewing angle/normal viewing angle, at this time, the unused second viewing angle film 302 has moved to the side of the light source assembly 102 away from the display panel 20, so that the flatness of the second viewing angle film 302 can be better ensured while the display effect of the wide viewing angle is not affected.

When the display module 000 of the embodiment needs to be switched to the narrow viewing angle display mode (as shown in fig. 9 and 10), the first transmission shaft 405 may be controlled to rotate along the direction G4 in fig. 9 (counterclockwise in fig. 9, opposite to the direction G3 in fig. 8) by a background control unit such as a driving motor, the first transmission shaft 405, the second transmission shaft 406, the third transmission shaft 407, and the fourth transmission shaft 408 may also be controlled to rotate along the direction G4 in fig. 9 by a background control unit such as a driving motor (as shown in fig. 9), the first transmission shaft 405 may also be controlled to rotate along the direction G3 in fig. 8 by a background control unit such as a driving motor, the first transmission shaft 405, the second transmission shaft 406, the third transmission shaft 407, and the fourth transmission shaft 408 may also be controlled to rotate along the direction G3 in fig. 8 by a background control unit such as a driving motor (as shown in fig. 10), it is only necessary to satisfy that the second viewing angle film 302 is transmitted between the backlight module 10 and the display panel 20, and make in the direction Z perpendicular to the light emitting surface of the display panel 20, the second viewing angle film 302 overlaps with the light emitting area LA, and then make the second viewing angle film 302, the light emitting area LA, the display area AA three overlap, the narrow viewing angle display effect of the display module 000 is realized through the second viewing angle film 302 at the narrow viewing angle, at this moment, the unused first viewing angle film 301 has moved to the side of the light source assembly 102 away from the display panel 20, when the narrow viewing angle display effect can be avoided being influenced, it is also favorable to the smoothness of the better first viewing angle film 301 of assurance.

In some alternative embodiments, please refer to fig. 1-2 and fig. 4 in combination, in the present embodiment, along the moving direction of the viewing angle control film 30 (i.e. the first direction X in fig. 1 and fig. 2), the length W1 of the first viewing angle film 301 is greater than the length W3 of the display area AA, and the length W2 of the second viewing angle film 302 is greater than the length W3 of the display area AA.

This embodiment further explains that along the moving direction of the viewing angle controlling film 30 (i.e. the first direction X in fig. 1 and fig. 2), the length W1 of the first viewing angle film 301 is greater than the length W3 of the display area AA, the length W2 of the second viewing angle film 302 is greater than the length W3 of the display area AA, optionally, the length W1 of the first viewing angle film 301 and the length W2 of the second viewing angle film 302 may be equal, so that it can be ensured that the reserved length is long enough when the two ends of the viewing angle controlling film 30 are connected to the film folding and unfolding assembly 40, and the viewing angle controlling film 30 is prevented from separating from the film folding and unfolding assembly 40, and it can be ensured that the first viewing angle film 301 can cover the display area AA as much as possible in the wide viewing angle display mode, and other types of films except the first viewing angle film 301 overlap the display area AA in the wide viewing angle display mode due to the length of the first viewing angle film 301 in the first direction X, cause the display interference, destroy the effect that the wide viewing angle was shown, also can guarantee as far as possible that second viewing angle diaphragm 302 can cover display area AA under narrow viewing angle display mode equally, avoid second viewing angle diaphragm 302 along the length undersize of first direction X to cause under the wide viewing angle display mode other except that second viewing angle diaphragm 302 type diaphragm and display area AA overlap, cause the display interference, destroy the effect that the narrow viewing angle was shown.

In some alternative embodiments, please refer to fig. 1-10, 11 and 12 in combination, in which fig. 11 is a schematic cross-sectional structure of a display module according to an embodiment of the present invention, and fig. 12 is a schematic cross-sectional structure of a display module according to an embodiment of the present invention (it can be understood that the cross-sectional directions of fig. 11 and 12 are the same as the moving direction of the viewing angle controlling film).

This embodiment explains that the first viewing angle film 301 of the viewing angle controlling film 30 may be a reflective polarized brightness enhancement film (DBEF).

Optionally, when the backlight module 10 is a direct-type backlight module, as shown in fig. 1, fig. 2, fig. 8 and fig. 9, the light source assembly 102 includes a plurality of first light sources 1021 arranged in an array, where the first light sources 1021 may be any one of sub-millimeter light emitting diodes (Mini LEDs), Micro light emitting diodes (Micro LEDs) or normal-sized Light Emitting Diodes (LEDs), and at this time, the optical film 103 includes a first diffusion plate 1031 (diffusion of light is achieved by fine particles on the optical film material), a first brightness enhancement plate 1032 (BEF) which plays a role in gathering light and enhancing brightness), the first diffusion plate 1031 is located on one side of the light source assembly 102 close to the display panel 20, and the first brightness enhancement plate 1032 is located on one side of the first diffusion plate 1031 close to the display panel 20. In the direction parallel to the light emitting surface of the display panel 000, a first reflective layer 1033 is disposed between two adjacent first light sources 1021, optionally, the first reflective layer 1033 may be coated at a gap between two adjacent first light sources 1021, so that light emitted from a part of the first light sources 1021 to a side of the backlight module 10 away from the display panel 20 may be further reflected back to improve the light utilization rate.

Optionally, the backlight module 10 is a side-in type backlight module, as shown in fig. 11 and 12, the light source assembly 102 includes a plurality of second light sources 1022 arranged in a stripe shape; the optical film 103 is located on one side of the light source assembly 102 in a direction parallel to the light-emitting surface of the display panel 000; at this time, the optical film 103 includes a second reflection sheet 1034, a light guide plate 1035, a second diffusion sheet 1036, and a second brightness enhancement sheet 1037(BEF) sequentially disposed along a direction toward the light exit surface of the display panel 20, where the second reflection sheet 1034 is used to reflect the light emitted from the side of the light guide plate 1035 away from the display panel 20, so as to further improve the light utilization rate.

The first viewing angle film 301 of the embodiment can be a reflective polarized light enhancement film (DBEF), so that when the display module 000 is in the wide viewing angle display mode, the reflective polarized light enhancement film DBEF and the brightness enhancement film BEF are combined together, and light of the backlight module is selectively reflected so as not to be absorbed by a lower polarizer (not shown) on one side of the display panel 20 close to the backlight module 10, so that a part of light of the display module 000 at the wide viewing angle is reused, thereby further improving the display brightness and the display effect in the wide viewing angle display mode.

In some optional embodiments, the first viewing angle film 301 may only be a transparent substrate structure, and the first viewing angle film 301 and the narrow viewing angle second viewing angle film 302 of the transparent substrate are integrally formed film structures, that is, the same viewing angle control film 30 is processed, so that the first viewing angle film 301 and the narrow viewing angle second viewing angle film 302 made of the transparent substrate can be formed in different areas, which is beneficial to reducing the thickness of the viewing angle control film 30; as can be understood by referring to the structure of the viewing angle control film of fig. 4, the difference between this embodiment and the embodiment of fig. 4 is only that the material of the first viewing angle film 301 of this embodiment is a transparent substrate.

Or, the first viewing angle film 301 is of a transparent base material structure, the viewing angle control film 30 includes a first transparent flexible substrate 300, the first viewing angle film 301 of the transparent base material and the second viewing angle film 302 of the narrow viewing angle are located on the same side of the first transparent flexible substrate 300, that is, the first viewing angle film 301 and the second viewing angle film 302 of the narrow viewing angle made of the prefabricated transparent base material can be attached to the same first transparent flexible substrate 300, so as to be beneficial to reducing the process processing difficulty of the viewing angle control film 30, and optionally, the materials of the first transparent flexible substrate 300 and the first viewing angle film 301 can be the same; as can be understood by referring to the structure of the viewing angle control film of fig. 5, the difference between this embodiment and the embodiment of fig. 5 is only that the material of the first viewing angle film 301 of this embodiment is a transparent substrate.

Or, the first viewing angle diaphragm 301 is of a transparent substrate structure, and the viewing angle control diaphragm 30 of the whole structure can be directly formed by directly connecting the first viewing angle diaphragm 301 made of a prefabricated transparent substrate and the second viewing angle diaphragm 302 with a narrow viewing angle, so that the process can be simplified, the process difficulty can be reduced, and the thickness of the diaphragm can be reduced; as can be understood by referring to the structure of the viewing angle control film of fig. 6, the difference between this embodiment and the embodiment of fig. 6 is only that the material of the first viewing angle film 301 of this embodiment is a transparent substrate.

Alternatively, as shown in fig. 13, fig. 13 is a schematic cross-sectional structure diagram of another viewing angle control film provided in the embodiment of the present invention, where the viewing angle control film 30 includes a first transparent flexible substrate 300, a second viewing angle film 302 with a narrow viewing angle is located on the same side of the first transparent flexible substrate 300, and the first transparent flexible substrate 300 at a position corresponding to a wide viewing angle/a normal viewing angle is empty, that is, the first viewing angle film 301 is not attached, that is, only a prefabricated second viewing angle film 302 with a narrow viewing angle is attached to one first transparent flexible substrate 300, so as to achieve a display effect of switching the narrow viewing angle, thereby facilitating reduction of difficulty in processing the viewing angle control film 30.

It is understood that when the first viewing angle film 301 is a reflective polarization brightness enhancement film (DBEF) and the backlight module 10 is a direct-type backlight module, as shown in fig. 1, 2, 8 and 9, the optical film 103 may include a first diffusion sheet 1031 and a first brightness enhancement sheet 1032 which are stacked.

When the first viewing angle film 301 is a reflective polarized brightness enhancement film (DBEF) and the backlight module 10 is a side-in type backlight module, as shown in fig. 11 and 12, the optical film 103 may include a second reflective sheet 1034, a light guide plate 1035, a second diffusion sheet 1036, and a second brightness enhancement sheet 1037 stacked together.

When the first viewing angle film 301 is a transparent substrate or is empty, and the backlight module 10 is a direct-type backlight module, the optical film 103 may include a first diffusion sheet 1031 and a first brightness enhancement sheet 1032 (not shown in the drawings) which are stacked; alternatively, as shown in fig. 14, fig. 14 is a schematic partial enlarged view of a light source assembly and an optical film in a backlight module according to an embodiment of the present invention, the optical film 103 may include a first diffusion sheet 1031, a first brightness enhancement sheet 1032, and a reflective polarization brightness enhancement film (DBEF)1038, which are stacked, a first reflective layer 1033 is disposed between two adjacent first light sources 1021, and the first reflective layer 1033 may be coated at a space between two adjacent first light sources 1021.

When the first viewing angle film 301 is a transparent substrate or is empty, and the backlight module 10 is a side-in type backlight module, the optical film 103 may include a second reflective sheet 1034, a light guide plate 1035, a second diffusion sheet 1036, and a second brightness enhancement sheet 1037 (not shown in the drawings) stacked in a stacked manner; alternatively, as shown in fig. 15, fig. 15 is another schematic partial enlarged structure diagram of the light source assembly and the optical film in the backlight module according to the embodiment of the present invention, the optical film 103 may include a second reflective sheet 1034, a light guide plate 1035, a second diffusion sheet 1036, a second brightness enhancement sheet 1037, and a reflective polarization brightness enhancement film (DBEF)1038, which are stacked, where the reflective polarization brightness enhancement film (DBEF)1038 may further enhance the light exiting effect of the backlight module 10.

The second viewing angle film 302 of this embodiment includes a collimating layer, and through the design of the collimating layer, the light emitted from the backlight module 10 can be controlled to be emitted within a narrow viewing angle, so as to achieve the narrow viewing angle display effect of the display module 000.

Optionally, referring to fig. 1-3, 16 and 17 in combination, fig. 16 is a schematic plan view of a second viewing angle film provided in an embodiment of the present invention, fig. 17 is a schematic sectional view along the direction a-a' in fig. 16, the second viewing angle film 302 of the present embodiment includes a collimating layer, the collimating layer includes a plurality of first light shielding portions 3021, and the plurality of first light shielding portions 3021 are arranged at intervals along the moving direction (i.e., the first direction X) of the viewing angle control film 30.

The second viewing angle film 302 with a narrow viewing angle according to the embodiment is explained to include a collimating layer, and the light emitted from the backlight module 10 is controlled to be emitted within a narrow viewing angle by the design of the collimating layer, so as to achieve the narrow viewing angle display effect of the display module 000. The collimating layer may be formed by a plurality of first light-shielding portions 3021, that is, the collimating layer may include a plurality of first light-shielding portions 3021 arranged at intervals along the moving direction (i.e., the first direction X) of the viewing angle controlling film 30, and an extending direction of each first light-shielding portion 3021 may intersect or be perpendicular to the first direction X in a direction parallel to the light emitting surface of the backlight module 10, so that the light emitted from the backlight module 10 may be controlled to be emitted within a narrow viewing angle range along the first direction X, and a narrow viewing angle display mode in the first direction X is realized.

It is to be understood that the material of the first light shielding portion 3021 is not particularly limited in this embodiment, and only the requirement of shielding light is satisfied. In this embodiment, the structure of the second viewing angle film 302 capable of achieving the collimating function is illustrated by way of example only, and in the specific implementation, the collimating layer may also be of other design structures, and only needs to control the light emitted from the backlight module 10 to be emitted within a narrower viewing angle range, so as to achieve the narrow viewing angle display mode, which is not limited in this embodiment.

Optionally, a highly-transparent collimating column 3020 may be filled between two adjacent first light-shielding portions 3021, that is, the first light-shielding portions 3021 and the collimating column 3020 are sequentially and circularly arranged to form the second viewing angle film 302, the first light-shielding portions 3021 are configured to prevent light with a large viewing angle (that is, light with a large included angle in a direction perpendicular to the light-emitting surface of the backlight module 10) from being emitted, and the highly-transparent collimating column 3020 is configured to allow most of light perpendicular to the light-emitting surface of the backlight module 10 to pass through, so that the light emitted from the backlight module 10 can be controlled to be emitted within a narrow viewing angle range along the first direction X, and a narrow viewing angle display mode is implemented.

Optionally, the second viewing angle film 302 of this embodiment may be manufactured by disposing the first light-shielding portions 3021 and the collimating columns 3020 on a transparent flexible substrate (not shown) in a circular arrangement in order to enhance the stability.

Optionally, referring to fig. 1-3, 18 and 19 in combination, fig. 18 is another schematic plan view of a second viewing angle film, fig. 19 is a schematic sectional view along the direction B-B' in fig. 18, in which the second viewing angle film 302 of this embodiment includes a collimating layer, the collimating layer includes a plurality of second light shielding portions 3022, the plurality of second light shielding portions 3022 are arranged at intervals along a second direction Y, where the second direction Y intersects with the moving direction of the viewing angle control film (i.e., the first direction X), and optionally, the second direction Y is perpendicular to the first direction X.

The second viewing angle film 302 with a narrow viewing angle according to the embodiment is explained to include a collimating layer, and the light emitted from the backlight module 10 is controlled to be emitted within a narrow viewing angle by the design of the collimating layer, so as to achieve the narrow viewing angle display effect of the display module 000. The collimating layer may be formed by a plurality of second light-shielding portions 3022, that is, the collimating layer may include a plurality of second light-shielding portions 3022 arranged at intervals along the second direction Y, and an extending direction of each second light-shielding portion 3022 is the same as the first direction X, where the second direction Y intersects with or is perpendicular to a moving direction of the viewing angle control film (i.e., the first direction X), so that the light emitted from the backlight module 10 may be controlled to be emitted within a narrow viewing angle range along the second direction Y, and a narrow viewing angle display mode in the second direction Y is realized.

Optionally, referring to fig. 1-3 and fig. 20 in combination, fig. 20 is another schematic plane structure diagram of the second viewing angle film provided in the embodiment of the present invention, in which the second viewing angle film 302 in the embodiment includes a collimating layer, the collimating layer includes a third light-shielding portion 3023, and the third light-shielding portion 3023 is in a grid structure, so that light emitted from the backlight module 10 can be controlled to be emitted within a narrower viewing angle range along the first direction X and the second direction Y through the grid-shaped third light-shielding portion 3023, and a narrow viewing angle display mode in the first direction X and the second direction Y is realized at the same time, which is further beneficial to reducing the thickness of the second viewing angle film 302.

It is understood that, in order to realize the narrow viewing angle display mode in the first direction X and the second direction Y at the same time, the second viewing angle film 302 formed by the plurality of first light shielding portions 3021 in fig. 16 and 17 in the above-described embodiment may also be stacked with both the second viewing angle film 302 formed by the plurality of second light shielding portions 3022 in fig. 18 and 19 in the above-described embodiment (not shown in the drawings), the narrow viewing angle ranges of the second viewing angle film 302 formed by the plurality of first light shielding portions 3021 and the second viewing angle film 302 formed by the plurality of second light shielding portions 3022 may be different or the same, and this embodiment is not limited, and thus, the narrow viewing angle display mode in the first direction X and the second direction Y may be realized while the process difficulty is reduced.

In some alternative embodiments, please refer to fig. 1-3, 21 and 22 in combination, fig. 21 is another schematic plan view of the second viewing angle film, fig. 22 is a schematic sectional view along the direction C-C' in fig. 21, the second viewing angle film 302 of this embodiment includes a collimating layer, the collimating layer includes a first sub-layer 302A and a second sub-layer 302B, the first sub-layer 302A includes a plurality of fourth light shielding portions 3024 arranged at intervals along the moving direction (i.e., the first direction X) of the viewing angle controlling film 30, and the second sub-layer 302B includes a plurality of fifth light shielding portions 3025 arranged at intervals along the moving direction (i.e., the first direction X) of the viewing angle controlling film 30; the orthographic projection of the fourth light-shielding portion 3024 on the light-emitting surface of the display panel 20 does not overlap the orthographic projection of the fifth light-shielding portion 3025 on the light-emitting surface of the display panel 20.

This embodiment explains that the collimating layer of the second viewing angle film 302 can also be a structure in which two sub-layers are stacked, that is, the structure includes a first sub-layer 302A and a second sub-layer 302B (in this embodiment, the first sub-layer 302A is located on the light emitting surface of the second sub-layer 302B away from the backlight module 10 as an example, which is schematically illustrated in fig. 22), the first sub-layer 302A includes a plurality of fourth light shielding portions 3024 arranged at intervals along the first direction X, the second sub-layer 302B includes a plurality of fifth light shielding portions 3025 arranged at intervals along the first direction X, the fourth light shielding portions 3024 and the fifth light shielding portions 3025 (it is understood that the illustration is made by different filling patterns, and the manufacturing materials of the fourth light shielding portions 3024 and the fifth light shielding portions 3025 are the same in the extending direction, and in the direction parallel to the light emitting surface of the backlight module 10, the extending directions of the fourth light shielding portions 3024 and the fifth light shielding portions 3025 can be the same as or perpendicular to the first direction X, in the different sub-layers of the collimating layer, the orthographic projection of the fourth light shielding portion 3024 to the light exit surface of the display panel 20 and the orthographic projection of the fifth light shielding portion 3025 to the light exit surface of the display panel 20 are not overlapped, that is, the orthographic projection of any one fourth light shielding portion 3024 to the light exit surface of the display panel 20 is located between the orthographic projections of the adjacent two fifth light shielding portions 3025 to the light exit surface of the display panel 20, so that the requirements of narrower viewing angles can be further met while the process difficulty is reduced through the staggered design of the light shielding portions in the two sub-layers.

Optionally, as shown in fig. 23 and fig. 24, fig. 23 is another schematic cross-sectional structure diagram of the display module provided in the embodiment of the present invention, and fig. 24 is another schematic cross-sectional structure diagram of the display module provided in the embodiment of the present invention (it can be understood that the cross-sectional direction of fig. 23 and fig. 24 is the same as the moving direction of the viewing angle control film, and the optical film is not illustrated in fig. 23 and fig. 24 for clearly illustrating the viewing angle control film 30 with a multilayer structure, and the arrangement structure of the optical film can be understood with reference to the structure in the above embodiment). Further optionally, a certain layer of the visual angle control film 30 in the multilayer visual angle control film 30 may further include a color conversion film, for example, when the light source assembly 102 providing the light source in the backlight module is a plurality of blue light emitting diodes (for example, a direct type backlight module is illustrated in fig. 23, and for example, a lateral type backlight module is illustrated in fig. 24), it may be set that a certain layer of the visual angle control film 30 in the multilayer visual angle control film 30 includes a quantum dot film, and the blue light emitting diodes are used as the light source, and the quantum dot film can excite pure green light and red light under excitation of blue light, and then mix the blue light to form high-quality white light, thereby being beneficial to improving the display effect.

In some alternative embodiments, please refer to fig. 25, where fig. 25 is a schematic structural diagram of a display device according to an embodiment of the present invention, and the display device 111 according to this embodiment includes the display module 000 according to the above embodiment of the present invention. Optionally, the display device 111 of this embodiment further includes a frame, the display module 000 is fixed in the frame, and the frame is used for protecting the display module 000. In the embodiment of fig. 25, the display device 111 is described by taking only the on-vehicle display device as an example, and when the display device 111 of the present embodiment is applied to the on-vehicle display system, the vehicle may include the main driving seat 50, the center console 60, and the passenger seat 70, and the display device 111 may be located inside the center console 60 or at the position of the passenger seat 70, that is, the display device 111 may be a display device located at the position of the center console 60 (as shown in fig. 25) or a display device located at the position of the passenger seat 70 (not shown). It should be understood that the display device 111 provided in the embodiment of the present invention may also be other display devices 111 having a display function and needing a peep-proof display effect, such as a computer and a television, and the present invention is not limited thereto. The display device 111 provided in the embodiment of the present invention has the beneficial effects of the display module 000 provided in the embodiment of the present invention, and specific descriptions of the display module 000 in the above embodiments may be specifically referred to, and this embodiment is not described herein again.

According to the embodiment, the display module and the display device provided by the invention at least realize the following beneficial effects:

Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims

1. A display module, comprising: the backlight module and the display panel are oppositely arranged, and the display panel comprises a display area;

the backlight module comprises a shell, a light source assembly and an optical diaphragm, wherein the light source assembly and the optical diaphragm are positioned in an accommodating space formed by the shell;

the display module also comprises at least one layer of visual angle control membrane, the visual angle control membrane is arranged between the backlight module and the display panel through a membrane folding and unfolding assembly, and the membrane folding and unfolding assembly is fixed in the shell;

the visual angle control film comprises a first visual angle film and a second visual angle film;

the display module comprises a wide visual angle display mode and a narrow visual angle display mode;

in the wide viewing angle display mode, the film folding and unfolding component controls the viewing angle control film to move, and the first viewing angle film is overlapped with the display area in a direction perpendicular to the light emitting surface of the display panel;

in the narrow viewing angle display mode, the film folding and unfolding assembly controls the viewing angle control film to move, and the second viewing angle film is overlapped with the display area in a direction perpendicular to the light emitting surface of the display panel.

2. The display module of claim 1, wherein the first viewing angle film and the second viewing angle film are arranged along a moving direction of the viewing angle control film.

3. The display module of claim 2 wherein the first viewing angle film and the second viewing angle film are connected to each other.

4. The display module according to claim 1, wherein the backlight module comprises a light-emitting area, and the light-emitting area overlaps with the display area in a direction perpendicular to a light-emitting surface of the display panel;

along a first direction, the backlight module further comprises a first non-light-emitting area and a second non-light-emitting area which are positioned on two opposite sides of the light-emitting area;

the diaphragm roll-out assembly is located in the first non-light-exiting region and the second non-light-exiting region.

5. The display module of claim 4,

the film take-up and pay-off assembly comprises a first scroll and a second scroll, the first scroll and the second scroll are respectively fixed on two opposite sides in the shell, the first scroll is located in the first non-light-emitting area, and the second scroll is located in the second non-light-emitting area;

in the first direction, the first reel is connected with one end of the visual angle control film, and the second reel is connected with the other end of the visual angle control film.

6. The display module of claim 5, wherein the film stretching assembly further comprises a first guide shaft and a second guide shaft, the first guide shaft and the second guide shaft being respectively fixed on two opposite sides of the housing, the first guide shaft being located in the first non-light-exiting region, the second guide shaft being located in the second non-light-exiting region;

in the direction perpendicular to the light emergent surface of the display panel, the first guide shaft is positioned on one side of the first scroll close to the display panel, and the second guide shaft is positioned on one side of the second scroll close to the display panel;

the first guide shaft is used for guiding the first viewing angle film to be wound on the first reel, and enabling the second viewing angle film to be overlapped with the light emergent area in the direction perpendicular to the light emergent surface of the display panel;

the second guide shaft is used for guiding the second viewing angle film to be wound on the second reel, and enables the first viewing angle film and the light emergent area to be overlapped in the direction perpendicular to the light emergent surface of the display panel.

7. The display module as claimed in claim 6, wherein a side of the first guide axis close to the display panel is flush with a side of the second guide axis close to the display panel in a direction perpendicular to a light exit surface of the display panel.

8. The display module of claim 4,

the membrane folding and unfolding component at least comprises a first transmission shaft, a second transmission shaft, a third transmission shaft and a fourth transmission shaft, wherein the first transmission shaft and the second transmission shaft are respectively fixed at two opposite sides in the shell, and the third transmission shaft and the fourth transmission shaft are respectively fixed at two opposite sides in the shell; the first transmission shaft and the third transmission shaft are positioned in the first non-light-emitting area, and the second transmission shaft and the fourth transmission shaft are positioned in the second non-light-emitting area;

the visual angle control film is arranged around the periphery of the light source assembly and the optical film through the first transmission shaft, the second transmission shaft, the third transmission shaft and the fourth transmission shaft;

the first transmission shaft, the second transmission shaft, the third transmission shaft and the fourth transmission shaft are used for:

in the wide viewing angle display mode, the first viewing angle film is conveyed between the backlight module and the display panel, and the first viewing angle film is overlapped with the light emergent area in a direction perpendicular to the light emergent surface of the display panel;

in the narrow viewing angle display mode, the second viewing angle film is transmitted between the backlight module and the display panel, and the second viewing angle film is overlapped with the light emergent area in a direction perpendicular to the light emergent surface of the display panel.

9. The display module of claim 1, wherein the first viewing angle film has a length greater than the length of the display area and the second viewing angle film has a length greater than the length of the display area along the moving direction of the viewing angle control film.

10. The display module of claim 1,

the first viewing angle film is a reflection type polarized light brightness enhancement film;

the second viewing angle film includes a collimating layer.

11. The display module of claim 10, wherein the collimating layer comprises a plurality of first light blocking portions, the plurality of first light blocking portions being arranged at intervals along a moving direction of the viewing angle control film.

12. The display module of claim 10, wherein the collimating layer comprises a plurality of second light blocking portions arranged at intervals along a second direction, wherein the second direction intersects with a moving direction of the viewing angle control film.

13. The display module according to claim 10, wherein the collimating layer comprises a third light shielding portion, and the third light shielding portion has a grid-like structure.

14. The display module according to claim 10, wherein the alignment layer comprises a first sub-layer and a second sub-layer, the first sub-layer comprises a plurality of fourth light-shielding portions arranged at intervals along the moving direction of the viewing angle control film, and the second sub-layer comprises a plurality of fifth light-shielding portions arranged at intervals along the moving direction of the viewing angle control film;

the orthographic projection of the fourth light shielding part to the light-emitting surface of the display panel is not overlapped with the orthographic projection of the fifth light shielding part to the light-emitting surface of the display panel.

15. The display module according to claim 1, wherein the backlight module is a direct-type backlight module, and the light source assembly comprises a plurality of first light sources arranged in an array;

the optical film comprises a first diffusion sheet and a first brightness enhancement sheet, the first diffusion sheet is positioned on one side, close to the display panel, of the light source assembly, and the first brightness enhancement sheet is positioned on one side, close to the display panel, of the first diffusion sheet;

and a first reflecting layer is arranged between every two adjacent first light sources in the direction parallel to the light emergent surface of the display panel.

16. The display module according to claim 1, wherein the backlight module is a side-in type backlight module, and the light source assembly comprises a plurality of second light sources arranged in a stripe shape; in the direction parallel to the light-emitting surface of the display panel, the optical film is positioned on one side of the light source component;

the optical film comprises a second reflection sheet, a light guide plate, a second diffusion sheet and a second brightness enhancement sheet which are sequentially arranged in the direction facing the light-emitting surface of the display panel.

17. The display module of claim 3, wherein a film extending/contracting force-receiving portion is disposed between the first viewing angle film and the second viewing angle film, one end of the film extending/contracting force-receiving portion is connected to the first viewing angle film, and the other end of the film extending/contracting force-receiving portion is connected to the second viewing angle film.

18. The display module of claim 1, wherein the membrane retracting assembly is coupled to a drive motor.

19. A display device comprising the display module according to any one of claims 1 to 18.

20. The display device according to claim 19, further comprising a frame, wherein the display module is fixed in the frame.