Display module and display device

Abstract

The present invention provides a display module, a display device, and an anti-peeping control method for a display device, which are applied to the display field to solve the problem of damage caused by peeping of a display device by people other than the user. The display module includes: a backlight module for emitting light and providing a backlight source. A dimming panel is arranged on the light-emitting side of the backlight module, and can switch between a non-anti-peeping state and an anti-peeping state. The anti-peeping direction of the dimming panel is a first direction. The display panel is used to display the image to be displayed. The anti-peeping film layer is arranged on the light-emitting side of the backlight module, and is used to collimate the light directed to the anti-peeping film layer, so that the scattering angle of the light is narrowed in the second direction. The second direction is perpendicular to the first direction.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a display module, a display device, and an anti-peeping control method for the display device. Background Art

[0002] With the popularity of mobile devices such as mobile computers, tablets and mobile phones, more and more people like to work and kill time on mobile devices in public places such as subways and high-speed railways. When using mobile devices in public places, due to the wide viewing angle and high-quality display of the display device of the mobile device, people other than the user can also clearly see the display screen of the display device, which may easily lead to the leakage of business secrets and personal privacy, resulting in losses. Summary of the Invention

[0003] The present invention provides a display module, a display device and an anti-peeping control method for the display device, so as to solve the problem that the display screen of the display device can be seen by persons other than the user, which may easily lead to the leakage of commercial secrets and personal privacy and cause losses.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] The first aspect of the present invention provides a display module, comprising: a backlight module for emitting light and providing a backlight source; a dimming panel, disposed on the light-emitting side of the backlight module, capable of switching between a non-privacy state and a privacy state, the privacy direction of the dimming panel being a first direction; a display panel, for displaying an image to be displayed; and an privacy film layer, disposed on the light-emitting side of the backlight module, for collimating light directed toward the privacy film layer, thereby narrowing the scattering angle of the light in a second direction. The second direction is perpendicular to the first direction.

[0006] The display module provided by some embodiments of the present invention collimates the light emitted from the backlight module toward the anti-peep film layer by providing an anti-peep film layer, narrowing the scattering angle of the light in the second direction, thereby narrowing the viewing angle of the display module in the second direction, thereby achieving anti-peeping in the second direction.

[0007] By providing a dimming panel, the display module can be switched between a non-privacy state and a privacy state in a first direction according to the operation of the dimming panel. When the dimming panel is in the non-privacy state, the display image of the display module can be clearly seen along the first direction on the light-emitting side of the display module. When the dimming panel is in the privacy state, the display image of the display device cannot be clearly seen by anyone other than the user on the light-emitting side of the display module, thereby preventing the leakage of commercial secrets and personal privacy, which could cause losses.

[0008] In some embodiments, the privacy film layer is disposed between the backlight module and the dimming panel.

[0009] In other embodiments, the anti-peep film layer is disposed on a side of the display panel away from the backlight module.

[0010] In some embodiments, the dimming panel includes a first polarizer, a first liquid crystal panel, and a second polarizer stacked in sequence, and the first polarizer is closer to the backlight module than the second polarizer.

[0011] In some embodiments, the first polarizer and the second polarizer have the same polarization direction.

[0012] In some embodiments, the dimming panel includes: at least one first electrode and at least one second electrode.

[0013] In some embodiments, it further includes: a bonding layer, arranged between the display panel and the dimming panel, for connecting the display panel and the dimming panel. The dimming panel includes a middle area and a first peripheral area located around the middle area, and the area near at least one side edge of the first peripheral area is a first binding area, and the first binding area is used to connect to an external circuit board. The display panel includes a display area and a second peripheral area located around the display area, and the area near at least one side edge of the second peripheral area is a second binding area, and the second binding area is used to connect to an external circuit board. The first binding area and the second binding area correspond to each other in at least a portion in a direction perpendicular to the plane where the display panel is located.

[0014] In some embodiments, the bonding layer includes bonding glue, the orthographic projection of the bonding glue on the display panel is located in the second peripheral area and is not set in the second binding area; and the orthographic projection of the bonding glue on the dimming panel is located in the first peripheral area and is not set in the first binding area.

[0015] In some embodiments, the first binding area is close to one side of the dimming panel, the second binding area is close to one side of the dimming panel, the bonding glue is U-shaped, and the U-shaped opening side of the bonding glue faces the first binding area.

[0016] In some embodiments, a non-glue area is provided at the U-shaped opening of the bonding glue.

[0017] In some embodiments, the bonding layer further includes: a spacer, the orthographic projection of which on the display panel is located in the second binding area.

[0018] In some embodiments, one side of the gasket is entirely coated with adhesive, and the other side of the gasket is coated with adhesive at intervals.

[0019] In some embodiments, the side of the spacer coated with adhesive on its entire surface faces the dimming panel, and the side of the spacer coated with adhesive on its intermittent surface faces the display panel.

[0020] In some embodiments, the display panel includes a third polarizer, a second liquid crystal panel, and a fourth polarizer stacked in sequence, the third polarizer is closer to the backlight module than the fourth polarizer; and the bonding layer is disposed between the second polarizer and the third polarizer.

[0021] In some embodiments, the display panel includes a third polarizer, a second liquid crystal panel, and a fourth polarizer stacked in sequence, the third polarizer being closer to the backlight module than the fourth polarizer, and the bonding layer being disposed between the second polarizer and the third polarizer.

[0022] In other embodiments, the display panel includes a second liquid crystal panel and a fifth polarizer stacked in sequence. The fifth polarizer is disposed on a side of the second liquid crystal panel away from the dimming panel. The second polarizer is reused as the display panel's polarizer, with the second polarizer and the fifth polarizer having polarization directions perpendicular to each other. A bonding layer is disposed between the second polarizer and the second liquid crystal panel.

[0023] In some embodiments, the backlight module is an edge-type backlight module.

[0024] As one possible design, the backlight module includes: a light source for providing backlight; the light source can be, for example, a point light source or a line light source; a light guide plate, disposed on one side of the light source, converting light emitted by the light source into light emitted from the light exiting surface of the light guide plate; and light emitted by the light source is converted into a surface light source after passing through the light guide plate; a reflective sheet, disposed on the reflective surface of the light guide plate; and a brightness enhancement film, disposed on the light exiting surface of the light guide plate.

[0025] Optionally, a plurality of lattice points are formed on the reflective surface of the light guide plate opposite to the light emitting surface, and the plurality of lattice points are used to destroy the total reflection of light, so that the light entering the light guide plate is randomly reflected and emitted from the light guide plate from the light emitting surface.

[0026] Optionally, a microstructure is formed on the light emitting surface of the light guide plate, and the microstructure is used to control the light entering the light guide plate to be emitted from the light emitting surface of the light guide plate.

[0027] A second aspect of the present invention provides a display device, comprising: the display module as described above.

[0028] The beneficial effects of the above-mentioned display device are the same as the beneficial effects of the display module provided by the first aspect of the present invention, and are not described in detail here.

[0029] In some embodiments, the display device further includes: a flexible circuit board connected to the dimming panel; a driver circuit board having a driver chip disposed thereon, the driver circuit board being electrically connected to the display panel, the backlight module, and the flexible circuit board. The driver circuit board is configured to drive the backlight module and the display panel. The driver circuit board is further configured to drive the dimming panel to switch between a non-privacy protection state and a privacy protection state.

[0030] A third aspect of the present invention provides a method for controlling a display device to prevent peeping, wherein a driver circuit board outputs a first drive signal to a display panel to control the display panel to display an image. The driver circuit board controls the dimming panel to switch between a non-prevent peeping state and a prevent peeping state.

[0031] The beneficial effects of the anti-peeping control method of the display device are the same as those of the display module provided by the first aspect of the present invention, and will not be described in detail here.

[0032] In some embodiments, the driver circuit board controls the dimming panel to switch between a non-privacy state and a privacy state, including: the driver circuit board does not output a signal to the dimming panel to control the dimming panel to switch to the non-privacy state; and the driver circuit board outputs a second driving signal to the dimming panel to control the dimming panel to switch to the privacy state. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0034] Figure 1 A top view of a display module provided by some embodiments of the present invention;

[0035] Figure 2A A side view of a display module provided by some embodiments of the present invention;

[0036] Figure 2B A front view of a display module provided by some embodiments of the present invention;

[0037] Figure 3A for Figure 1 Cross-sectional view along the AA axis;

[0038] Figure 3B for Figure 1 Cross-sectional view along the BB direction;

[0039] Figure 3C A structural diagram of a backlight module provided by some embodiments of the present invention;

[0040] Figure 4A A cross-sectional structural diagram of an anti-peep film layer provided in some embodiments of the present invention;

[0041] Figure 4B A diagram of the outgoing light path of a backlight module provided in some embodiments of the present invention;

[0042] Figure 5 A structural diagram of a display module provided by some embodiments of the present invention;

[0043] Figure 6 Structural diagrams of display modules provided in some other embodiments of the present invention;

[0044] Figure 7 A structural diagram of a display panel provided by some embodiments of the present invention;

[0045] Figure 8 Structural diagrams of display panels provided by other embodiments of the present invention;

[0046] Figure 9 A front view of a dimming panel provided in some other embodiments of the present invention;

[0047] Figure 10 A front view of a display panel provided for some other embodiments of the present invention;

[0048] Figure 11 for Figure 7 Cross-sectional view in CC direction;

[0049] Figure 12 A structural diagram of a gasket provided in some embodiments of the present invention;

[0050] Figure 13 A structural diagram of a bonding adhesive provided by some embodiments of the present invention;

[0051] Figure 14 A cross-sectional structural diagram of a dimming panel provided in some embodiments of the present invention;

[0052] Figure 15 Cross-sectional structural diagrams of dimming panels provided in other embodiments of the present invention;

[0053] Figure 16 A structural diagram of a first electrode and a second electrode provided in some embodiments of the present invention;

[0054] Figure 17 A structural diagram of a first electrode and a second electrode provided in some other embodiments of the present invention;

[0055] Figure 18 A structural diagram of a first electrode and a second electrode provided in some other embodiments of the present invention;

[0056] Figure 19 A cross-sectional structural diagram of a dimming panel provided in some embodiments of the present invention;

[0057] Figure 20 Cross-sectional structural diagrams of dimming panels provided in other embodiments of the present invention;

[0058] Figure 21 A structural diagram of a first electrode and a second electrode provided in some embodiments of the present invention;

[0059] Figure 22 is a structural diagram of a display device provided in some embodiments of the present invention;

[0060] Figure 23 A diagram of the light propagation path of the dimming panel provided in some embodiments of the present invention in a non-privacy state;

[0061] Figure 24 A diagram of the light propagation path of a dimming panel in an anti-peeping state provided by some embodiments of the present invention. DETAILED DESCRIPTION

[0062] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in some embodiments of the present disclosure. Obviously, the embodiments described are only some embodiments of the present disclosure, not all embodiments. Based on the embodiments provided by the present disclosure, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of the present disclosure.

[0063] Unless the context requires otherwise, throughout the specification and claims, the term "including" is to be interpreted as having an open, inclusive meaning, that is, "including, but not limited to". In the description of the specification, the terms "one embodiment", "some embodiments", "exemplary embodiments", "example", "specific example" or "some examples" are intended to indicate that specific features, structures, materials or characteristics associated with the embodiment or example are included in at least one embodiment or example of the present disclosure. The schematic representation of the above terms does not necessarily refer to the same embodiment or example. In addition, the specific features, structures, materials or characteristics may be included in any one or more embodiments or examples in any appropriate manner.

[0064] In the following, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present disclosure, unless otherwise specified, "plurality" means two or more.

[0065] The use of "adapted to" or "configured to" herein is intended to be open and inclusive language that does not exclude devices adapted or configured to perform additional tasks or steps.

[0066] It will be understood that when a layer or element is referred to as being on another layer or substrate, it can be directly on the other layer or substrate, or intervening layers may be present therebetween.

[0067] Exemplary embodiments are described herein with reference to cross-sectional and / or plan views that are idealized exemplary drawings. In the drawings, the thicknesses of layers and regions are exaggerated for clarity. Therefore, variations in shape relative to the drawings due to, for example, manufacturing techniques and / or tolerances are contemplated. Therefore, the exemplary embodiments should not be construed as limited to the shapes of the regions shown herein, but rather include deviations in shape due to, for example, manufacturing. For example, an etched region shown as a rectangle will typically have curved features. Therefore, the regions shown in the drawings are schematic in nature, and their shapes are not intended to illustrate the actual shape of regions of the device and are not intended to limit the scope of the exemplary embodiments.

[0068] With the popularity of mobile devices such as mobile computers, tablets and mobile phones, more and more people like to work and kill time on mobile devices in public places such as subways and high-speed railways. When using mobile devices in public places, due to the wide viewing angle and high-quality display of the display device of the mobile device, people other than the user can also clearly see the display screen of the display device, which may easily lead to the leakage of business secrets and personal privacy, resulting in losses.

[0069] Taking a liquid crystal display device as an example, it includes a liquid crystal display module, which in turn includes a backlight module and a display panel. Because the display panel itself cannot emit light, a backlight module is required. The backlight provided by the backlight module passes through the liquid crystal layer in the display panel and is then emitted, resulting in the display panel displaying the image to be displayed. The image to be displayed is the image that the display module needs to present, such as black, white, gray, or color.

[0070] The two opposite sides of the backlight module are the light-emitting side and the non-light-emitting side, respectively. The light emitted by the backlight module is emitted from the light-emitting side. The two opposite sides of the display panel are the display side and the non-display side, respectively. The non-display side of the display panel faces the light-emitting side of the backlight module, and the display side of the display module faces the same direction as the display side of the display panel. The display side of the display panel is the display side of the display module. It can be understood that the display side of the display module is the display side S of the display module, and the other area except the display side S is the non-display side S'; wherein the display side S is the area where the display screen of the display panel can be seen; specifically, as shown in FIG. Figure 1 、 Figure 2A 、 Figure 2BAs shown, the display side S includes: a main viewing area S0, a first side viewing area S1 on both sides of the main viewing area S0 along the first direction X, and a second side viewing area S2 on both sides of the main viewing area S0 along the second direction Y. For example, the first direction X and the second direction Y are perpendicular, and the third direction Z is a direction perpendicular to the plane where the display panel is located. The main viewing area S0 can be considered to be the front of one side of the display side S of the display module 100, and correspondingly, the first side viewing area S1 is the left and right sides of the display side S of the display module, and the second side viewing area S2 is the upper and lower sides of the display side S of the display module 100. As an example, Figure 1 The display module shown is, for example, a horizontally placed screen, which is a top view of the display module. Figure 2A for Figure 1 The left side view of the display module shown, Figure 2B for Figure 1 The front view of the display module is shown.

[0071] The visible area of ​​the display module is the area where the display screen of the display module can be clearly seen, and the visible area includes at least a part of the display side S of the display module; accordingly, the invisible area of ​​the display module is the area where the display screen of the display module cannot be clearly seen or cannot be seen, and other areas except the visible area are invisible areas; it can be understood that the invisible area includes: the non-display side S' of the display device (the area other than the light-emitting side of the display device), or the non-display side S' of the display device and a part of the display side S (by setting an anti-peeping device or other technical means, so that part of the display area cannot clearly see or cannot see the display screen of the display device, then this part of the display area is the invisible area).

[0072] In some embodiments of the related art, the display module is provided without a privacy protection device, and the entire display side S is a visible area. The privacy protection device may be, for example, a privacy film or other structural design or any other technical means capable of achieving a privacy protection effect. The entire display side is a visible area, including: a main viewing area S0, first side viewing areas S1 on either side of the main viewing area S0 along a first direction X, and second side viewing areas S2 on either side of the main viewing area S0 along a second direction Y.

[0073] A first aspect of the present invention provides a display module 100, such as Figure 3A 、 Figure 3BAs shown, it includes: a backlight module 10, a dimming panel 20, a display panel 30 and an anti-peep film layer 40. Among them, the backlight module 10 is used to emit light 105a to provide a backlight source. The dimming panel 20 is arranged on the light-emitting side of the backlight module 10, and can switch between a non-anti-peep state and an anti-peep state, that is, the dimming panel 20 in this case is used to adjust the light-emitting angle of the display module 100, thereby realizing the switching between a wide viewing angle or a narrow viewing angle, and the anti-peep direction of the dimming panel 20 is the first direction X. The display panel 30 is used to display the image to be displayed. The anti-peep film layer 40 is arranged on the light-emitting side of the backlight module 10, and is used to collimate the light directed to the anti-peep film layer 40, so that the scattering angle of the light is narrowed in the second direction Y. The second direction Y is perpendicular to the first direction X.

[0074] Among them, the anti-peeping direction of the dimming panel 20 is the first direction X, which means that when the dimming panel 20 is in the anti-peeping state, on the display side S of the display module 100, the first side viewing areas S1 located on both sides of the main viewing area S0 along the first direction X are invisible areas, and the display screen of the display module 100 cannot be clearly seen or cannot be seen in the invisible areas.

[0075] The anti-peep film layer 40 is used to collimate the light directed toward the anti-peep film layer 40. The light passing through the anti-peep film layer 40 can only be directed toward the front of the anti-peep film layer and toward the two sides in the first direction X located directly in front, and the scattering angle of the light is narrowed in the second direction Y (a portion of the light directed toward the two sides in the second direction Y located directly in front is blocked by the anti-peep film layer 40 and cannot be emitted). As a result, in the display side S of the display module 100, the second side viewing area S2 located on both sides of the main viewing area S0 along the second direction Y is an invisible area, and the display screen of the display module 100 cannot be clearly seen or cannot be seen in the invisible area.

[0076] In some embodiments, as Figure 2A 、 Figure 2B 、 Figure 3A 、 Figure 3B As shown, the display panel 30 is disposed on a side of the dimming panel 20 away from the backlight module 10 . The light emitted toward the dimming panel 20 is modulated by the dimming panel 20 and then emitted to the display panel 30 .

[0077] like Figure 1 、 Figure 2A 、 Figure 2B 、 Figure 3A 、 Figure 3BAs shown, by providing the anti-peep film layer 40 and the dimming panel 20, when the dimming panel 20 is in the anti-peep state, the display screen of the display module 100 can be seen in the main viewing area S0 of the display module 100, while the display screen of the display module 100 cannot be clearly seen or cannot be seen in other areas. Therefore, it is possible to achieve anti-peep in the four directions of the display module 100, avoiding the leakage of commercial secrets and personal privacy, which may cause losses. Moreover, when the dimming panel 20 is in the non-anti-peep state, the display screen of the display module 100 can be clearly seen in the main viewing area S0 and the first side viewing areas S1 on both sides of the main viewing area S0 along the first direction X, thereby realizing screen sharing.

[0078] By switching the dimming panel 20 between the non-peeping state and the peeping state, the first side viewing areas S1 on both sides of the main viewing area S0 of the display module 100 along the first direction X are switched between a visible state and an invisible state.

[0079] Taking the dimming panel 20 as an example, which is located between the backlight module 10 and the display panel 30, when the dimming panel 20 is switched to the non-privacy protection state, the light emitted from the backlight module 10 to the dimming panel 20 can pass through the dimming panel 20 and be emitted to the display panel 30. At this time, the display image of the display module 100 can be seen in the area where the first side viewing areas S1 on both sides of the main viewing area S0 of the display module 100 along the first direction X are located. That is, Figure 2B As shown, the visible area of ​​the display module 100 along the first direction X includes a main viewing area S0 and first side viewing areas S1 on both sides of the main viewing area S0 along the first direction X. The display image of the display module 100 can be seen in the display area S.

[0080] For example, Figure 3A 、 Figure 3B As shown, the backlight module 10 is, for example, an edge-type backlight module.

[0081] As a possible structure, Figure 3A 、 Figure 3B As shown, the backlight module 10 includes: a light source, a light guide plate 102 , a reflective sheet 103 , a brightness enhancement film 104 , and the like.

[0082] Specifically, the light source is, for example, a point light source or a line light source.

[0083] In some embodiments, as Figure 3A 、 Figure 3B As shown, the light guide plate 102 is arranged on one side of the light source, and the light guide plate 102 includes a light emitting surface 102a and a light reflecting surface 102b opposite to each other; after the light 101 emitted by the light source enters the light guide plate 102, it is converted into a surface light source emitted from the light emitting surface 102a of the light guide plate 102.

[0084] In some embodiments, the light guide plate 102 is made of a resin material, for example, PMMA (Polymethyl Methacrylate, commonly known as acrylic or organic glass), Senonor (a thermoplastic resin of cycloolefin), or PC (polycarbonate).

[0085] As a possible design, the cross-sectional shape of the light guide plate 102 is, for example, a wedge shape. The cross-sectional shape of the light guide plate 102 is the shape of the light guide plate 102 seen when looking at the light guide plate 102 from the light source. The light guide plate 102 having a wedge-shaped cross-sectional shape is thinner than the light guide plate having a flat cross-sectional shape. For example, when the structural dimensions of the backlight module 10 are the same, the thinnest outer thickness of the light guide plate 102 having a wedge-shaped cross-sectional shape can reach 0.5 mm, while the thickness of the light guide plate having a flat cross-sectional shape is 2 mm. In addition, the light loss of the light guide plate 102 having a wedge-shaped cross-sectional shape, which is opposite to the light source, is less, and the light utilization rate is higher than that of the light guide plate having a flat cross-sectional shape. For the backlight module 10 , under the premise of providing backlight of the same brightness for the display module 100 , the backlight module 10 using the light guide plate 102 with a wedge-shaped cross section consumes less energy than the backlight module 10 using the light guide plate with a flat cross section.

[0086] like Figure 3A 、 Figure 3B 、 Figure 3C As shown, the light 101 entering the light guide plate 102 is the light emitted by the light source, and the light emitted from the light emitting surface 102 a of the light guide plate 102 is the light 105 a emitted by the backlight module 10 toward the dimming panel 20 and the display panel 30 .

[0087] In other embodiments, Figure 3A 、 Figure 3B As shown, a plurality of grid points are formed on the reflective surface 102 b of the light guide plate 102 , and the plurality of grid points are used to control the light entering the light guide plate to be emitted from the light emitting surface of the light guide plate.

[0088] Specifically, the plurality of dots 102 c on the reflective surface 102 b of the light guide plate 102 are, for example, printed dots or non-printed dots.

[0089] For example, the plurality of dots 102c on the light guide plate 102 are printed dots, which are printed on the reflective surface 102b of the light guide plate 102 after the light guide plate 102 is processed. Furthermore, the plurality of dots 102c printed on the reflective surface 102b of the light guide plate 102 are printed using ink. Furthermore, for example, heat-drying ink or UV (ultraviolet curing) ink is used.

[0090] For example, the plurality of dots 102c on the light guide plate 102 are non-printed dots formed directly on the reflective surface 102b of the light guide plate 102 during the molding of the light guide plate 102. Furthermore, the plurality of dots 102c can be formed directly on the reflective surface 102b of the light guide plate 102 during the external shaping of the light guide plate, for example, by chemical etching, precision machining, photolithography, or internal diffusion.

[0091] In some embodiments, as Figure 3C As shown, microstructures 102d are formed on one side of the reflective surface 102b of the light guide plate 102. The microstructures 102d are used to control the light 101 entering the light guide plate 102 to be emitted from the light exiting surface 102a of the light guide plate 102. Furthermore, the microstructures 102d on the reflective surface 102b of the light guide plate 102 are, for example, triangular pyramid-shaped depressions facing the interior of the light guide plate 102. The provision of multiple microstructures 102d increases the convexity and concavity of the reflective surface 102b of the light guide plate 102. As a result, light rays incident on the microstructures 102d are reflected at a wider range of angles, thereby increasing the amount of light emitted from the light guide plate 102 through the light exiting surface 102b.

[0092] In some embodiments, as Figure 3A 、 Figure 3B As shown, the reflective sheet 103 is disposed on the reflective surface 102b of the light guide plate 102 and is used to reflect a portion of the light 101 emitted from the reflective surface 102b of the light guide plate 102 back into the light guide plate 102, and emit it from the light-emitting surface 102b of the light guide plate 102, thereby increasing the utilization rate of the light 101. The portion of the light 101 emitted from the reflective surface 102b of the light guide plate 102 is a portion of the light 101 emitted by the light source into the light guide plate 102. With respect to the backlight module 10, while providing the same brightness for the display module 100, the backlight module 10 using the reflective sheet 103 consumes less energy than the backlight module 10 without the reflective sheet 103.

[0093] In some embodiments, as Figure 3A 、 Figure 3B As shown, the brightness enhancement film 104 is disposed on one side of the light emitting surface 102 b of the light guide plate 102 for enhancing the brightness of the light 105 a emitted from the light emitting surface 102 b of the light guide plate 102 toward the display module 100 .

[0094] Specifically, the brightness enhancement film 104 is, for example, a prism sheet, which is used to concentrate the light 105a emitted from the light emitting surface 102b of the light guide plate 102 to emit within a certain angle range, thereby improving the display brightness of the display module.

[0095] As one possible structure, the brightness enhancement film 104 includes a fixed substrate and a plurality of protrusions disposed on the fixed substrate. For example, the cross-sectional shape of the plurality of protrusions is, for example, an overlapping prism. Furthermore, the fixed substrate is, for example, made of PET (Polyethylene terephthalate, commonly known as polyester resin), and the plurality of protrusions are, for example, made of acrylic resin.

[0096] like Figure 3A 、 Figure 3B 、 Figure 3C As shown, light 101 is the light emitted by the light source in the backlight module 10, and light 105a is the light emitted from the light-emitting side of the backlight module 10. In some embodiments, the anti-peep film layer 40 is disposed on the side of the display panel 30 away from the backlight module 10. In this case, the light emitted to the dimming panel 20 is the light 105a emitted from the light-emitting side of the backlight module 10. In other embodiments, the anti-peep film layer 40 is disposed between the backlight module 10 and the dimming panel 20. In this case, as shown in FIG. Figure 3A 、 Figure 3C As shown, the light incident on the dimming panel 20 is the portion of light 105 b of the light 105 a emitted by the backlight module 10 that can pass through the anti-peep film layer 40 .

[0097] In the display module 100 provided by some embodiments of the present invention, the anti-peep film layer 40 is disposed between the backlight module 10 and the dimming panel 20 as an example. When the dimming panel 20 is switched to the anti-peep state, as shown in FIG. Figure 3B As shown, the light directed toward the dimming panel 20 is the light 105b that passes through the anti-peep film layer 40 and is directed toward the dimming panel. Among the light 105b that enters the dimming panel, part of the light 105c that is perpendicular to the first direction X or approximately perpendicular to the first direction X can pass through the dimming panel 20 and be directed toward the display panel 30. At this time, as shown in FIG. Figure 2B As shown, the display screen of the display module 100 cannot be seen or cannot be clearly seen in the area where the first side viewing areas S1 on both sides along the first direction X are located in the main viewing area S0 of the display module 100, that is, the first side viewing areas S1 on both sides of the main viewing area S0 along the first direction X become invisible areas, and the visible area of ​​the display module 100 along the first direction X only includes the main viewing area S0, thereby realizing the anti-peeping effect of the display module 100 along the first direction X.

[0098] In some embodiments, as Figure 4AAs shown, the privacy film layer 40 includes a louver microstructure layer. The louver microstructure layer includes multiple light-transmitting areas 401 and multiple light-shielding areas 402, which are arranged alternately. The light emission path of the light is a straight line. Therefore, among the light rays 105a emitted from the backlight module 10 toward the privacy film layer 40, the light rays emitted toward the light-shielding areas 402 in the privacy film layer 40 along the third direction Z are blocked by the multiple light-shielding areas 402 in the privacy film layer 40 and cannot be emitted through the light-shielding areas 402; another portion of the light rays 105a passes through the light-transmitting areas 401 and emits the privacy film layer 40. The light rays 105b that pass through the light-transmitting areas 401 and emit the privacy film layer 40 include: the portion of the light within the light-transmitting areas 401 and the light rays that pass through the light-transmitting areas 401 and emit the privacy film layer 40 after multiple reflections on the opposite surfaces of two adjacent light-shielding areas 402.

[0099] like Figure 4B As shown, the scattering angle of the outgoing light of the backlight module 10 in the second direction Y is β. Figure 4A By providing the anti-peep film layer 40, the scattering angle of the outgoing light of the backlight module 10 in the second direction Y is narrowed to α, thereby narrowing the visible area of ​​the display module 100 in the second direction Y. For example, the anti-peep film layer 40 is provided between the backlight module 10 and the dimming panel 20. Figure 3A As shown, among the light 105a emitted by the backlight module 10 toward the anti-peep film layer 40, only the light 105b in the plane parallel to the third direction Z and perpendicular to the second direction Y can be emitted to the dimming panel 20 and the display panel 30. The scattering angle of the light 105b emitted after passing through the anti-peep film layer 40 in the second direction Y is α, and α is less than β, so that the scattering angle of the outgoing light of the backlight module 10 converges in the second direction Y, thereby narrowing the viewing angle of the display module 100 along the second direction Y. , so that the second side viewing areas S2 on both sides of the main viewing area S0 along the second direction Y have only partial outgoing light or no outgoing light. Therefore, in the second side viewing areas S2, the display screen of the display module 100 cannot be seen clearly or cannot be seen. That is, the second side viewing areas S2 on both sides of the main viewing area S0 along the second direction Y become invisible areas, and the visible area of ​​the display module 100 along the second direction Y only includes the main viewing area S0, thereby realizing the anti-peeping effect of the display module 100 along the second direction Y.

[0100] In summary, in some embodiments of the related art, the display module does not have an anti-peeping device, and the entire display side S is a visible area. The present invention, by providing an anti-peeping film layer 40 and a dimming panel 20, can achieve anti-peeping in the first direction X and the second direction Y. When the display module 100 is in the anti-peeping state (i.e., the dimming panel 20 is in the anti-peeping state), the display image of the display module 100 can only be seen within the main viewing area S0 of the display module 100, thereby ensuring privacy and security. In addition, the present invention switches the dimming panel 20 between the non-peeping state and the anti-peeping state, thereby achieving the switching of the display module 100 between the non-peeping state and the anti-peeping state, making it more convenient to use.

[0101] In some embodiments, as Figure 5 As shown, the privacy film layer 40 is disposed on a side of the display panel 30 away from the backlight module 10 .

[0102] In other embodiments, Figure 6 As shown, the anti-peep film layer 40 is disposed between the backlight module 10 and the dimming panel 20 .

[0103] By setting the anti-peep film layer 40, such as Figure 2A 、 Figure 3A As shown, the visible area of ​​the display module 100 is narrowed in the second direction Y, so that the second side viewing areas S2 on both sides of the main viewing area S0 along the second direction Y have only partial outgoing light or no outgoing light. Therefore, in the second side viewing areas S2, the display screen of the display module 100 cannot be seen clearly or cannot be seen, that is, the second side viewing areas S2 on both sides of the main viewing area S0 along the second direction Y become invisible areas, and the visible area of ​​the display module 100 along the second direction Y only includes the main viewing area S0, thereby realizing the anti-peeping function of the display module 100 along the second direction Y.

[0104] The relative positions of the privacy film layer 40 , the display panel 30 and the dimming panel 20 in the display module can be designed according to actual needs, so that the design flexibility of the display module 100 is higher, it can adapt to more application scenarios and is more convenient to use.

[0105] In some embodiments, as Figure 7 As shown, the dimming panel 20 includes a first polarizer 201 , a first liquid crystal panel 202 , and a second polarizer 203 stacked in sequence. The first polarizer 201 is closer to the backlight module 10 than the second polarizer 203 .

[0106] By respectively arranging a first polarizer 201 and a second polarizer 203 on the first liquid crystal panel 202, while protecting the first liquid crystal panel 202, the first polarizer 201 is also used to convert the light emitted by the backlight module 10 toward the dimming panel 10 (the light emitted by the backlight module 10 can be regarded as natural light, including multiple linear polarized lights with different vibration directions) into linear polarized light consistent with the polarization direction of the first polarizer 201, and the second polarizer 203 is also used to analyze the light electrically modulated by the liquid crystal molecules in the first liquid crystal panel 202. After the electrodes are energized, the liquid crystal molecules convert the light emitted toward the first side viewing area S1 on both sides of the main viewing area S0 along the first direction X into elliptically polarized light or circularly polarized light, and emit it toward the main viewing area The light of S0 is still linearly polarized light and is consistent with the polarization direction of the second polarizer 203; when the elliptically polarized light or circularly polarized light passes through the second polarizer 203, only the part consistent with the polarization direction of the second polarizer 203 can be emitted, and the linear polarized light consistent with the polarization direction of the second polarizer 203 can pass through the second polarizer 203 in its entirety or in its majority to be emitted. It can be understood that, at this time, a light-dark contrast is generated between the main viewing area S0 and the first side viewing areas S1 on both sides of the main viewing area S0 along the first direction X. The display brightness of the display module 100 in the main viewing area S0 is greater than the display brightness in the first side viewing areas S1 on both sides of the main viewing area S0 along the first direction X, thereby achieving privacy protection of the display module 100 in the first direction X.

[0107] In some embodiments, Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 As shown, the display module 100 further includes: a bonding layer 50 disposed between the display panel 30 and the dimming panel 20 for connecting the display panel 30 and the dimming panel 20 .

[0108] By setting a bonding layer 50, the dimming panel 20 is connected to the display panel 30, and there is no direct contact between the dimming panel 20 and the display panel 30. When either the dimming panel 20 or the display panel 30 has a problem and needs to be replaced, the dimming panel 20 and the display panel 30 can be quickly separated by removing the bonding layer 50. Compared with the connection method of directly bonding the dimming panel 20 and the display panel 30, the problem of damage to the relative connection surfaces of the dimming panel 20 and the display panel 30 when the dimming panel 20 and the display panel 30 are separated is reduced.

[0109] In some embodiments, as Figure 7 As shown, the display panel 30 includes a third polarizer 301, a second liquid crystal panel 302, and a fourth polarizer 303 stacked in sequence. The third polarizer 301 is closer to the backlight module 10 than the fourth polarizer 303. Furthermore, a bonding layer 50 is provided between the second polarizer 203 and the third polarizer 301.

[0110] In some embodiments, as Figure 8 As shown, the display panel 30 includes a second liquid crystal panel 302 and a fifth polarizer 304 stacked in sequence. The fifth polarizer 304 is disposed on a side of the second liquid crystal panel 302 away from the dimming panel 20. Furthermore, the second polarizer 203 is reused as the polarizer of the display panel 30, and the polarization directions of the second polarizer 203 and the fifth polarizer 304 are perpendicular. Furthermore, a bonding layer 50 is disposed between the second polarizer 203 and the second liquid crystal panel 302.

[0111] By reusing the second polarizer 203 as the polarizer of the display panel 30 , the cost of the display module 100 is reduced, and the overall thickness of the display module 100 is also reduced.

[0112] Exemplarily, the dimming panel 20 includes a middle area 20a and a first peripheral area 20b located around the middle area 20a. The area near at least one side of the first peripheral area 20b is a first binding area 20c, which is used to connect to an external circuit board. Furthermore, the external circuit board is, for example, a PCB (Printed Circuit Board) or an FPC (Flexible Printed Circuit). The external circuit board is used to provide a drive signal that can control the dimming panel 20 to switch between a non-peeping state and an anti-peeping state.

[0113] Specifically, the dimming panel 20 switches between the non-peeping state and the peeping state under the driving signal transmitted by the external circuit board.

[0114] In some embodiments, as Figure 9 As shown, the dimming panel 20 includes a middle area 20 a and a first peripheral area 20 b located around the middle area 20 a . The first peripheral area 20 b is located near one of the side edges of the dimming panel 20 and is a first binding area 20 c .

[0115] Specifically, the light emitted from the backlight module 10 can pass through the middle area 20 a of the dimming panel 20 and be emitted toward the display panel 30 .

[0116] Furthermore, when the dimming panel 20 is in the non-peeping state, the light emitted by the backlight module 10 can pass through the middle area 20 a of the dimming panel 20 and be emitted toward the display panel 30 .

[0117] Furthermore, when the dimming panel 20 is in the anti-peeping state, as shown in FIG. Figure 3B As shown, among the light rays emitted from the backlight module 10 to the dimming panel 20, only part of the light rays in the plane parallel to the third direction Z and perpendicular to the first direction X can pass through the dimming panel 20 and be emitted to the display panel 30. It can be understood that Figure 2BAs shown in the figure, light is emitted from the main viewing area S0, while no light is emitted from the first side viewing area S1, that is, the display image of the display panel 30 can be seen in the main viewing area S0, but the display image of the display panel 30 cannot be seen in the first side viewing area S1, thereby realizing the anti-peeping effect of the display module 100 along the first direction X.

[0118] Exemplarily, the display panel 30 includes a display area 30a and a second peripheral area 30b surrounding the display area 30a. A region of the second peripheral area 30b near at least one side edge is a second binding area 30c, which is used to connect to an external circuit board. Furthermore, the external circuit board may be, for example, a PCB (Printed Circuit Board) or an FPC (Flexible Printed Circuit).

[0119] Specifically, if Figure 10 As shown, the display panel 30 displays an image in the display area 30a, and the second binding area 30c of the display panel 30 is used to set a binding electrode, which is electrically connected to an external circuit board. A driving device is connected to the external circuit board. The driving device converts the image to be displayed into a display signal and transmits it to the display panel 30 through a signal line, thereby controlling the display panel 30 to display the image to be displayed in the display area 30a.

[0120] In some embodiments, as Figure 10 As shown, there is, for example, one second binding area 30 c , and the second binding area 30 c is located in an area close to any side edge of the second peripheral area 30 b .

[0121] In some other embodiments, there are two second binding areas 30 c , for example, and the second binding areas 30 c are located in areas of the second peripheral area 30 b close to any two sides of the display panel 30 .

[0122] In other embodiments, there are multiple second binding areas 30c, for example, and the multiple second binding areas 30c are arranged around the display area 30a, and each second binding area 30c is located in an area close to one side of the second peripheral area 30b.

[0123] As a possible design, the first binding area 20c and the second binding area 30c correspond to each other in at least a portion in a direction perpendicular to the plane of the display panel 30. Specifically, the first binding area 20c corresponds to the second binding area 30c in a one-to-one correspondence and in a direction perpendicular to the display side of the display panel 30.

[0124] In some embodiments, as Figure 7 、 Figure 8 、 Figure 11As shown, the bonding layer 50 includes bonding adhesive 501. The orthographic projection of the bonding adhesive 501 on the display panel 30 is located in the second peripheral area 30b and is not provided in the second binding area 30c. Furthermore, the orthographic projection of the bonding adhesive 501 on the dimming panel 20 is located in the first peripheral area 20b and is not provided in the first binding area 20c. In other words, the bonding adhesive 501 is not shaped like a closed ring or frame. The bonding adhesive has an opening at least in the second binding area 30c (or the first binding area 20c). The bonding adhesive 501 is provided between the first peripheral area 20b and the second peripheral area 30b.

[0125] Exemplarily, the bonding adhesive 501 is, for example, double-sided adhesive.

[0126] By setting bonding glue 501 between the display panel 30 and the dimming panel 20, the display panel 30 and the dimming panel 20 can be firmly bonded. The bonding glue 501 is located between the first peripheral area 20b and the second peripheral area 30b, and is not set between the first binding area 20c and the second binding area 30c. In this way, while ensuring the bonding performance, an area without bonding glue 502 can be reserved, which is conducive to the separation of defective parts; and in the second binding area 30c (or the first binding area 20c), only a position for setting the binding electrode needs to be reserved, and there is no need to reserve a position for setting the bonding glue and the binding electrode at the same time, so that the area of ​​the second binding area 30c (or the first binding area 20c) can be reduced, which is conducive to narrowing the frame.

[0127] Exemplarily, the size of the first binding area is 0.3mm to 0.5mm along the direction perpendicular to the side to which the first binding area is close, and / or the size of the second binding area is 0.3mm, 0.4mm or 0.5mm along the direction perpendicular to the side to which the second binding area is close.

[0128] In some embodiments, as Figure 11 As shown, the first binding area 20c is close to one side of the dimming panel 20, and the second binding area 30c is close to one side of the dimming panel 30, that is, the first binding area 20c and the second binding area 30c are both one. Figure 13 As shown, the bonding adhesive 501 is U-shaped, and the U-shaped opening side of the bonding adhesive 501 faces the first binding area 20c.

[0129] In some embodiments, as Figure 11 、 Figure 12As shown, the bonding layer 50 further includes a spacer 502, the orthographic projection of which on the display panel 30 is located in the second binding area 30c. It is understood that, since the first binding area 20c and the second binding area 30c correspond to each other at least in part in a direction perpendicular to the plane of the display panel 30, the orthographic projection of the spacer 502 on the dimming panel 20 is located in the first binding area 20c, and the spacer is located between the first binding area 20c and the second binding area 30c.

[0130] like Figure 7 、 Figure 8 、 Figure 11 As shown, by providing the gasket 502, the gap between the opposing surfaces of the dimming panel 20 and the display panel 30 in the area where the bonding glue 501 is not provided is filled, so that each side edge between the opposing surfaces of the dimming panel 20 and the display panel 30 is supported. This avoids the situation in which, during the production process of the display module 100, the dimming panel 20 and the display panel 30 are transferred together, and the dimming panel 20 and the display panel 30 are damaged at the opposing side edge where the gap exists due to the gap between the opposing sides of the opposing surfaces of the dimming panel 20 and the display panel 30 when accidentally subjected to external force. This effectively reduces the damage rate of the dimming panel 20 and the display panel 30 during operation during the production process.

[0131] In some embodiments of the related technology, the dimming panel 20 and the display panel 30 are connected by a closed ring-shaped bonding glue provided on the side opposite to the dimming panel 20 and the display panel 30, and the aforementioned closed ring-shaped bonding glue is located in the first peripheral area 20b of the dimming panel 20 and in the second peripheral area 30b of the display panel 30.

[0132] In the present invention, a bonding layer 50 is formed by bonding glue 501 and a gasket 502. The gasket 502 is arranged in the area opposite to the first binding area 20c on the dimming panel 20 and the second binding area 30c on the display panel 30. Compared with the bonding glue arranged around each side opposite to the dimming panel 20 and the display panel 30, the size of the binding area is reduced, and the ratio of the area of ​​the display area 30a of the display panel 30 to the area of ​​the entire display surface of the display panel 30 is larger, that is, the display area 30a of the display panel 30 is larger and the second peripheral area 30b is smaller. It can be understood that such a structural design can realize the attachment of a narrow-frame product of the display module 100.

[0133] In some embodiments, as Figure 7 、 Figure 8 、 Figure 11 、 Figure 12 As shown, one side of the gasket 502 is entirely coated with adhesive 5021 , and the other side of the gasket 502 is coated with adhesive 5021 at intervals.

[0134] Exemplarily, the adhesive 5021 is, for example, double-sided tape.

[0135] Further, if Figure 7 、 Figure 8 、 Figure 11 As shown, the side of the spacer 502 entirely coated with the adhesive 5021 faces the dimming panel 20 , and the side of the spacer 502 intermittently coated with the adhesive 5021 faces the display panel 30 .

[0136] An adhesive 5021 is applied to the entire surface of the gasket 502 facing the dimming panel 20 to increase the adhesion between the dimming panel 20 and the display panel 30, so that the connection between the dimming panel 20 and the display panel 30 is more secure. By applying the adhesive 5021 at intervals on the gasket 502 toward the display panel 30, while ensuring the effective connection between the dimming panel 20 and the display panel 30, it is more conducive to separating the dimming panel 20 and the display panel 30 compared to applying the adhesive 5021 on the entire surface, and can effectively reduce the breakage rate of the dimming panel 20 and the display panel 30 during rework and separation, thereby improving reworkability.

[0137] Further, if Figure 13 As shown, a non-glue area 5011 is provided at the U-shaped opening of the bonding glue 501 .

[0138] The bonding layer also includes a non-adhesive area disposed at the U-shaped opening of the bonding adhesive. For example, there are two non-adhesive areas, each connected to one end of the bonding adhesive. The non-adhesive area is a non-sticky, solid component. The non-adhesive area 5011 serves as a tearing handle for separating the dimming panel 20 from the display panel 30. When separating the dimming panel 20 from the display panel 30, the non-adhesive area 5011 is pulled to remove the bonding adhesive 501 from between the dimming panel 20 and the display panel 30, thereby separating the dimming panel 20 from the display panel 30.

[0139] In some embodiments, the dimming panel 20 includes a first liquid crystal panel 202 , where the first liquid crystal panel 202 includes a first liquid crystal layer, at least one first electrode 204 , and at least one second electrode 205 .

[0140] Illustratively, the first liquid crystal layer includes a plurality of liquid crystal molecules 2021 .

[0141] Furthermore, the plurality of liquid crystal molecules 2021 in the first liquid crystal layer are, for example, smectic liquid crystal, nematic liquid crystal, and cholesteric liquid crystal.

[0142] The first electrode 204 is, for example, a pixel electrode, and the second electrode 205 is, for example, a common electrode. The second electrode 205 receives a constant common voltage signal. The first electrode 204 receives a driving signal. Under the drive of the driving signal and the common voltage signal, an electric field is formed between the first electrode 204 and the second electrode 205. The electric field drives the liquid crystal molecules 2021 to deflect, thereby changing the emission angle of the light.

[0143] In some embodiments, as Figure 20 As shown, the first electrode 204 and the second electrode 205 are located on the same side of the first liquid crystal panel 202 .

[0144] In other embodiments, Figure 14 、 Figure 15 、 Figure 19 As shown, the first electrode 204 and the second electrode 205 are located on opposite sides of the first liquid crystal panel 202 .

[0145] Exemplarily, the first electrode 204 and the second electrode 205 are, for example, planar electrodes, strip electrodes, or block electrodes.

[0146] For example, Figure 14 、 Figure 15 、 Figure 19 、 Figure 20 As shown, the dimming panel 20 further includes a first substrate 206 and a second substrate 207 disposed opposite to each other, and the first substrate 206 and the second substrate 207 are respectively located on opposite sides of the first liquid crystal panel 202. For example, the first substrate 206 is an array substrate, and the second substrate 207 is an opposing substrate.

[0147] A first alignment layer is further provided on the side of the first substrate 206 facing the first liquid crystal panel 202, and a second alignment layer is further provided on the side of the second substrate 207 facing the first liquid crystal panel 202. The alignment directions of the first and second alignment layers are used to control the alignment direction of the liquid crystal molecules 2021 in the first liquid crystal panel 202 when no power is applied to the first and second electrodes 204, 205.

[0148] As a possible design, the dimming panel 20 is configured so that, in the non-privacy protection state, the polarization state of the light rays directed toward the main viewing area S0 and the first side viewing area S1, among the light rays directed toward the dimming panel 20, remains unchanged, so that they can pass through the second polarizer 203. Furthermore, the dimming panel 20 is further configured so that, in the privacy protection state, the polarization state of the light rays directed toward the main viewing area S0, among the light rays directed toward the dimming panel 10, remains unchanged, so that they can pass through the second polarizer 203, while the polarization state of the light rays directed toward the first side viewing area S1 changes, so that at least a portion of the light rays are filtered out by the second polarizer 203.

[0149] In some embodiments, the first polarizer 201 and the second polarizer 203 have the same polarization direction.

[0150] Specifically, the light (which can be regarded as natural light) emitted from the backlight module 10 toward the dimming panel 20 is converted into a first linear polarized light having the same polarization direction as the first polarizer 201 after passing through the first polarizer 201 and is emitted into the first liquid crystal panel 202. The first linear polarized light passes through the first liquid crystal panel 202 and is emitted toward the second polarizer 203. Since the first polarizer 201 and the second polarizer 203 have the same polarization direction, the first linear polarized light having the same polarization direction as the first polarizer 201 can pass through the second polarizer 203 and be emitted.

[0151] Furthermore, the alignment direction of the first alignment layer is consistent with the polarization direction of the first polarizer 201 , and the alignment direction of the second alignment layer is consistent with the polarization direction of the second polarizer 203 .

[0152] As a possible implementation, the dimming panel 20 is in a non-peeping state, and the dimming panel 20 is not powered. At this time, among the light emitted by the backlight module 10 toward the dimming panel 20 (the light emitted by the backlight module 10 can be regarded as natural light, which is composed of a plurality of linearly polarized lights with different polarization directions), only a portion of the linearly polarized light having the same polarization direction as the first polarizer 201 can pass through the first polarizer 201, because the orientation direction of the first alignment layer is consistent with the polarization direction of the first polarizer 201. It can be seen that the polarization direction of the linearly polarized light having the same polarization direction as the first polarizer 201 that passes through the first polarizer 201 is consistent with the orientation direction of the first alignment layer; then, the linearly polarized light enters the first liquid crystal layer (the first liquid crystal layer). Among the liquid crystal molecules in the layer, the long axis direction of the liquid crystal molecules 2021 near the first alignment layer is consistent with the alignment direction of the first alignment layer, and the long axis direction of the liquid crystal molecules 2021 near the second alignment layer is consistent with the alignment direction of the second alignment layer). The linearly polarized light entering the first liquid crystal layer directly enters the long axis of the liquid crystal molecules 2021 closest to the first alignment layer in parallel. Under the transmission of the liquid crystal molecules 2021, the linearly polarized light enters the long axis of the liquid crystal molecules 2021 closest to the second alignment layer in parallel. The polarization direction of the linearly polarized light entering the long axis of the liquid crystal molecules 2021 closest to the second alignment layer is consistent with the polarization direction of the second polarizer 203. Therefore, the linearly polarized light can pass through the second polarizer 203 and be emitted outside the dimming panel 20. At this time, the light in the main viewing area S0 and the first side viewing areas S1 on both sides of the main viewing area S0 along the first direction X can be emitted normally, and the display image of the display module 100 can be seen in the main viewing area S0 and the first side viewing areas S1 on both sides of the main viewing area S0 along the first direction X.

[0153] The dimming panel 20 is in an anti-peeping state and is powered on. At this time, the light emitted from the backlight module 10 toward the dimming panel 20 is converted into linearly polarized light having the same polarization direction as the first polarizer 201 after passing through the first polarizer 201. Then, after the linearly polarized light enters the first liquid crystal panel 202 through the dimming panel 20, the linearly polarized light is electrically modulated by the liquid crystal molecules 2021 in the first liquid crystal panel 202, and the light emitted toward the first side viewing areas S1 on both sides of the main viewing area S0 along the first direction X is converted into elliptically polarized light or circularly polarized light. Since the polarizer only allows light having the same polarization direction to pass through, among the elliptically polarized light or circularly polarized light emitted toward the first side viewing areas S1 on both sides of the main viewing area S0 along the first direction X, only the portion of the linearly polarized light having the same polarization direction as the second polarizer 203 can pass through the second polarizer 203 and be emitted out of the dimming panel 20. At this time, light in the main viewing area S0 can be emitted normally, and the display screen of the display module 100 can be clearly seen in the main viewing area S0; only part of the light or no light is emitted in the first side viewing areas S1 on both sides of the main viewing area S0 along the first direction X, and the display screen of the display module 100 cannot be seen clearly or cannot be seen in the first side viewing areas S1.

[0154] In other embodiments, the polarization direction of the first polarizer 201 and the second polarizer 203 is the same, and the first orientation layer and the second orientation layer are not aligned. At this time, the first orientation layer and the second orientation layer have no orientation direction, and the first orientation layer and the second orientation layer do not affect the arrangement direction of the liquid crystal molecules 2021 in the first liquid crystal panel 202.

[0155] As a possible implementation, the dimming panel 20 is in a non-peep-proof state and the dimming panel 20 is not powered. At this time, among the light emitted by the backlight module 10 toward the dimming panel 20 (the light emitted by the backlight module 10 can be regarded as natural light, composed of multiple linear polarized lights with different polarization directions), only part of the linear polarized light with the same polarization direction as the first polarizer 201 can pass through the first polarizer 201, and the linear polarized light enters the first liquid crystal layer and is transmitted by the liquid crystal molecules 2021 and emitted toward the second polarizer 203; among the light emitted toward the second polarizer 203, the linear polarized light with the same polarization direction as the second polarizer 203 can pass through the second polarizer 203 and be emitted out of the dimming panel 20. Light can be emitted toward the main viewing area S0 and the first side viewing areas S1 on both sides of the main viewing area S0 along the first direction X. The "can be emitted" here refers to the consistency of the brightness of the emitted light. At this time, the display screen of the display module 100 can be seen in the main viewing area S0 and the first side viewing areas S1 on both sides of the main viewing area S0 along the first direction X.

[0156] The dimming panel 20 is in the anti-peep state and the dimming panel 20 is powered on. At this time, among the light rays emitted from the backlight module 10 toward the dimming panel 20, only a portion of the linearly polarized light having the same polarization direction as the first polarizer 201 can pass through the first polarizer 201 and enter the first liquid crystal layer. Under the electrical modulation of the liquid crystal molecules of the linearly polarized light entering the first liquid crystal layer, the light rays emitted toward the main viewing area S0 are linearly polarized light having the same polarization direction as the second polarizer 203, and the light rays emitted toward the first side viewing areas S1 on both sides of the main viewing area S0 along the first direction X are converted into elliptically polarized light or circularly polarized light. Since the polarizer only allows light rays having the same polarization direction to pass through, among the elliptically polarized light or circularly polarized light rays emitted toward the first side viewing areas S1 on both sides of the main viewing area S0 along the first direction X, only a portion of the linearly polarized light having the same polarization direction as the second polarizer 203 can pass through the second polarizer 203 and be emitted out of the dimming panel 20. At this time, light in the main viewing area S0 can be emitted normally, and the display screen of the display module 100 can be clearly seen in the main viewing area S0; only part of the light or no light is emitted in the first side viewing areas S1 on both sides of the main viewing area S0 along the first direction X, and the display screen of the display module 100 cannot be seen clearly or cannot be seen in the first side viewing areas S1.

[0157] In some embodiments, as Figure 14 As shown, the dimming panel 20 includes a first electrode 204 and a second electrode 205, and the first electrode 204 and the second electrode 205 are, for example, planar electrodes. Furthermore, the first electrode 204 and the second electrode 205 are located on opposite sides of the first liquid crystal panel 202. For example, the first electrode 204 is disposed on a first substrate 206, and the second electrode 205 is disposed on a second substrate 207.

[0158] As a possible design, Figure 15 、 Figure 16 、 Figure 17 As shown, the dimming panel 20 includes: a first electrode 204 and a plurality of second electrodes 205, wherein the first electrode 204 is, for example, a planar electrode, and the second electrodes 205 are, for example, strip electrodes. Furthermore, the first electrode 204 and the second electrode 205 are located on opposite sides of the first liquid crystal panel 202. For example, the first electrode 204 is disposed on a first substrate 206, and the second electrode 205 is disposed on a second substrate 207.

[0159] As a possible design, Figure 15 、 Figure 18As shown, the dimming panel 20 includes: a first electrode 204 and a plurality of second electrodes 205, wherein the first electrode 204 is, for example, a planar electrode, and the second electrodes 205 are, for example, block-shaped electrodes separated from each other. Furthermore, the first electrode 204 and the second electrode 205 are located on opposite sides of the first liquid crystal panel 202. For example, the first electrode 204 is disposed on a first substrate 206, and the second electrode 205 is disposed on a second substrate 207.

[0160] As a possible design, Figure 21 As shown, the dimming panel 20 includes: a plurality of first electrodes 204 and a plurality of second electrodes 205, and the first electrodes 204 and the second electrodes 205 are both strip electrodes. Figure 19 As shown, the first electrode 204 and the second electrode 205 are located on opposite sides of the first liquid crystal panel 202. In other embodiments, as shown in FIG. Figure 20 As shown, the first electrode 204 and the second electrode 205 are located on the same side of the first liquid crystal panel 202. For example, the first electrode 204 and the second electrode 205 are arranged on the first substrate 206 at intervals.

[0161] Exemplarily, the display panel 30 includes a second liquid crystal panel 302 , and the second liquid crystal panel 302 includes a second liquid crystal layer, a plurality of third electrodes, and at least one fourth electrode.

[0162] Illustratively, the second liquid crystal layer includes a plurality of liquid crystal molecules.

[0163] Furthermore, the plurality of liquid crystal molecules in the first liquid crystal layer are, for example, smectic liquid crystal, nematic liquid crystal, and cholesteric liquid crystal.

[0164] The fourth electrode is, for example, a common electrode, which receives a constant common voltage signal; the third electrode is, for example, a pixel electrode, which receives a driving signal; under the drive signal and the common voltage signal, an electric field is formed between the third electrode and the fourth electrode, and the electric field drives the liquid crystal molecules to deflect, thereby changing the brightness of the emitted light.

[0165] Exemplarily, the third electrode and the fourth electrode are, for example, planar electrodes, strip electrodes or block electrodes.

[0166] Exemplarily, the display panel 30 further includes: a third substrate and a fourth substrate disposed opposite to each other. Exemplarily, the third substrate is an array substrate, and the fourth substrate is an opposing substrate.

[0167] As a possible design, a third alignment layer is further provided on the side of the third substrate facing the second liquid crystal panel 302, and a fourth alignment layer is further provided on the side of the fourth substrate facing the second liquid crystal panel 302. The alignment directions of the third and fourth alignment layers are used to control the alignment direction of the liquid crystal molecules in the second liquid crystal panel 302 when no power is applied to the third and fourth electrodes.

[0168] Exemplarily, the third electrode and the fourth electrode are located on opposite sides of the second liquid crystal panel 302. As a possible design, the third electrode is disposed on the third substrate, and the fourth electrode is disposed on the fourth substrate.

[0169] In some embodiments, the fourth electrode is, for example, a planar electrode, and the third electrode is, for example, a strip electrode or a block electrode.

[0170] In other embodiments, the fourth electrode is, for example, a strip electrode, the third electrode is, for example, a strip electrode, and the third electrode and the fourth electrode are in one-to-one correspondence.

[0171] In other embodiments, the fourth electrode is, for example, a strip electrode, and the third electrode is, for example, a block electrode.

[0172] Exemplarily, the third electrode and the fourth electrode are located on the same side of the second liquid crystal panel 302. As a possible design, the third electrode and the fourth electrode are spaced apart and arranged on the third substrate.

[0173] In some embodiments, the fourth electrode is, for example, a strip electrode, the third electrode is, for example, a strip electrode, and the third electrode and the fourth electrode are spaced apart.

[0174] In some other embodiments, the fourth electrode is, for example, a strip electrode or a block electrode, and the third electrode is, for example, a block electrode.

[0175] As a possible design, the display area 30a of the display panel 30 includes multiple sub-pixel areas, the third electrode is, for example, a pixel electrode, which is a strip electrode, and the fourth electrode is, for example, a common electrode, which is a planar electrode. Each sub-pixel area is correspondingly provided with a third electrode, and the orthographic projection of the fourth electrode on the display panel 30 covers at least multiple sub-pixel areas in the display area 30a. Under the control of the received driving signal, the third electrode forms an electric field with the fourth electrode, and an electric field of corresponding intensity is formed in each sub-pixel area, so that the liquid crystal molecules are deflected to different degrees under the action of the electric field of corresponding intensity, controlling the light emission, thereby enabling the display of different grayscales.

[0176] The arrangement and shape of the third electrode 305 and the fourth electrode 306 in the display panel 30 may refer to the description of the first electrode 204 and the second electrode 205 in the dimming panel 20 , and will not be repeated here.

[0177] Some embodiments of the present invention further provide a display device 1000, such as Figure 1 、 Figure 3A 、 Figure 3B 、 Figure 7 、 Figure 8 、 Figure 11 and Figure 22 As shown, the display device 1000 includes: a display module 100 , a flexible circuit board 200 and a driving circuit board 300 .

[0178] The flexible circuit board 200 is connected to the dimming panel 20 .

[0179] The driver circuit board 300 is provided with a driver chip 400. The driver circuit board 300 is electrically connected to the display panel 30, the backlight module 10, and the flexible circuit board 200. The driver circuit board 300 is configured to drive the backlight module 10 and the display panel 30. The driver circuit board 300 is also configured to drive the dimming panel 20 to switch between a non-privacy protection state and a privacy protection state.

[0180] In some embodiments, the dimming panel includes a first binding area for connecting to an external circuit board, such as the flexible circuit board 200. The display panel includes a second binding area for connecting to an external circuit board, such as the driver circuit board 300.

[0181] In some examples, such as Figure 22 As shown, the driver circuit board 300 is set on the side of the display panel and is close to the second binding area. The driver circuit board 300 is connected to the second binding area. The driver chip transmits the driving signal to the display panel through the driver circuit board 300 to control the display panel display. The flexible circuit board is set on the side of the dimming panel and is close to the first binding area. The flexible circuit board is connected to the first binding area and is connected to the driver circuit board 300. The driver chip transmits the driving signal to the dimming panel through the driver circuit board 300 to control the dimming panel to switch between anti-peeping and non-anti-peeping states.

[0182] In some embodiments of the related art, the display device does not have an anti-peeping device, and the entire display side S is a visible area. The present invention, by providing an anti-peeping film layer 40 and a dimming panel 20, can achieve anti-peeping in the first direction X and the second direction Y. This allows the display module 100 to be in the anti-peeping state (i.e., the dimming panel 20 is in the anti-peeping state) so that the display image of the display device 1000 can only be seen within the main viewing area S0 of the display device 1000, thereby ensuring privacy and security. Furthermore, the present invention switches the dimming panel 20 between the non-peeping state and the anti-peeping state, thereby enabling the display device 1000 to switch between the non-peeping state and the anti-peeping state, making it more convenient to use.

[0183] By providing a bonding layer 50 to connect the dimming panel 20 and the display panel 30, compared with a connection method of directly bonding the dimming panel 20 and the display panel 30, the problem of damage to the connecting surfaces of the dimming panel 20 and the display panel 30 when the dimming panel 20 and the display panel 30 are separated is reduced.

[0184] By providing the spacer 502, the gap between the opposing surfaces of the dimming panel 20 and the display panel 30 where the bonding adhesive 501 is not provided is filled, so that each side edge between the opposing surfaces of the dimming panel 20 and the display panel 30 is supported. This effectively reduces the breakage rate of the dimming panel 20 and the display panel 30 during operation during the production process. By applying the adhesive 5021 at intervals from the spacer 502 toward the display panel 30, while ensuring the effective connection between the dimming panel 20 and the display panel 30, it is more convenient to separate the dimming panel 20 and the display panel 30 compared to applying the adhesive 5021 on the entire surface. This can effectively reduce the breakage rate of the dimming panel 20 and the display panel 30 during rework and separation, thereby improving reworkability.

[0185] By setting the glue-free area 5011 as a tearing handle for separating the dimming panel 20 and the display panel 30, when separating the dimming panel 20 and the display panel 30, the glue-free area 5011 is pulled to pull the bonding glue 501 out from between the dimming panel 20 and the display panel 30, thereby separating the dimming panel 20 and the display panel 30.

[0186] Some embodiments of the present invention further provide a method for controlling a privacy protection display device 1000. The method includes: a driver circuit board 300 outputting a first drive signal to a display panel to control the display panel to display an image. The driver circuit board 300 controls the dimming panel to switch between a non-privacy protection state and a privacy protection state.

[0187] In some embodiments, the driver circuit board 300 controls the dimming panel to switch between the non-privacy state and the privacy state, including: the driver circuit board 300 does not output a signal to the dimming panel to control the dimming panel to switch to the non-privacy state; and the driver circuit board 300 outputs a second driving signal to the dimming panel to control the dimming panel to switch to the privacy state.

[0188] Liquid crystal molecules are elliptical and have birefringence. Linearly polarized light incident from one side of the liquid crystal molecule has an angle between its vibration direction and the long axis of the liquid crystal. When this angle is zero, the linearly polarized light entering the liquid crystal molecule remains linearly polarized along the long axis of the liquid crystal molecule and maintains this state as it propagates forward. When this angle is not zero, the linearly polarized light entering the liquid crystal molecule is decomposed into a first refracted light and a second refracted light with mutually perpendicular vibration directions. Both the first and second refracted lights are linearly polarized, and their polarization directions are perpendicular to the long axis of the liquid crystal molecule. Subsequently, a phase difference is generated between the first and second refracted lights upon exiting the liquid crystal molecule, and they recombine to form elliptically polarized light, which then maintains this state as it propagates forward.

[0189] In some embodiments, the polarization direction of the first polarizer 201 in the dimming panel 20 is the same as the polarization direction of the second polarizer 203 .

[0190] Further, if Figure 1 、 Figure 2B 、 Figure 3B 、 Figure 23 As shown, (the directions of P1 and T shown in the figure are the directions of the propagation path of the light) when the driving circuit board 300 does not output a signal to the dimming panel 20, the dimming panel 20 is in a non-peeping state. At this time, the dimming panel 20 is in an unpowered state, and the long axes of the liquid crystal molecules 2021 in the first liquid crystal panel 202 are parallel to the plane where the light-emitting surface of the dimming panel 20 is located. The light 105a emitted from the backlight module 10 to the display module 100 is converted into a first linearly polarized light P1 with the same polarization direction as the first polarizer 201 after passing through the first polarizer 201. Among the light 105a emitted from the backlight module 10 to the first polarizer 201, the part of the light with a different polarization direction from the first polarizer 201 is filtered out and cannot pass through the first polarizer 2 01; then the first linear polarized light P1 passes through the first liquid crystal panel 202 and is emitted toward the second polarizer 203. The polarization direction of the first linear polarized light P1 entering the first liquid crystal panel 202 is parallel to the direction of the long axis of the liquid crystal molecule 2021. Therefore, when the first linear polarized light P1 passes through the first liquid crystal panel 202, it propagates through the long axis of the liquid crystal molecule 2021. After passing through the first liquid crystal panel 202, the first linear polarized light P1 is emitted toward the polarization direction of the second polarizer 203. Then, the first linear polarized light P1 passes through the second polarizer 203 and is emitted from the dimming panel 20. At this time, the display screen of the display module device 1000 can be seen in the main viewing area S0 and the first side viewing areas S1 on both sides of the main viewing area S0 along the first direction X.

[0191] Further, if Figure 1 、 Figure 2B 、 Figure 3B 、 Figure 24 As shown in the figure, (the directions of P1 and T shown in the figure are the directions of the propagation path of the light) the driving circuit board 300 outputs a second driving signal to the dimming panel 20 to control the dimming panel 20 to switch to the anti-peeping state. At this time, the dimming panel 20 is in the power-on state, the long axis direction of the liquid crystal molecules 2021 in the first liquid crystal panel 202 is perpendicular to the plane where the light-emitting surface of the dimming panel 20 is located, and the light 105a emitted from the backlight module 10 to the display module 100 is converted into a first linear polarized light P1 with the same polarization direction as the first polarizer 201 after passing through the first polarizer 201. Among the light 105a emitted from the backlight module 10 to the first polarizer 201, the part of the light with a different polarization direction from the first polarizer 201 is filtered out and cannot pass through the first polarizer 201; then the first linear polarized light P1 passes through the first liquid crystal panel 202 and is emitted to the second polarizer 203. When the first linear polarized light P1 passes through the first liquid crystal panel 202:

[0192] In the portion of the first linearly polarized light P1 that faces the main viewing area S0, the long axis direction of the liquid crystal molecules 2021 is the same as the polarization direction of the first linearly polarized light P1. The first linearly polarized light P1 is transmitted through the liquid crystal molecules 2021 toward the second polarizer 203, and then passes through the second polarizer 203 and exits the dimming template 20.

[0193] In the first linear polarized light P1, in the part of the first side viewing area S1 on both sides of the main viewing area S0 in the first direction X, the long axis direction of the liquid crystal molecules 2021 is perpendicular to the plane where the light-emitting surface of the dimming panel 20 is located, and is converted into elliptically polarized light T through the transmission of the liquid crystal molecules 2021. The part of the elliptically polarized light T that has the same polarization direction as the second polarizer 203 can pass through the second polarizer 203 and be emitted, and the rest is filtered out by the second polarizer 203 and cannot pass through the second polarizer 203. At this time, the first side viewing areas S1 on both sides of the main viewing area S0 in the first direction X cannot clearly see or cannot see the display screen of the display module device 1000, thereby realizing anti-peeping in the first direction X of the display device 1000.

[0194] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention are intended to be covered by the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be based on the scope of protection of the claims.

Claims

1. A display module, characterized in that: include: Backlight module, used to emit light and provide backlight; A dimming panel is provided on the light-emitting side of the backlight module and is capable of switching between a non-privacy protection state and a privacy protection state, wherein the privacy protection direction of the dimming panel is a first direction; the dimming panel includes a middle area and a first peripheral area located around the middle area, wherein an area of ​​the first peripheral area close to at least one side edge is a first binding area, and the first binding area is used to connect to an external circuit board; A display panel for displaying an image to be displayed; the display panel includes a display area and a second peripheral area located around the display area, wherein an area of ​​the second peripheral area near at least one side edge is a second binding area, and the second binding area is used to connect to an external circuit board; the first binding area and the second binding area correspond to each other in at least a portion in a direction perpendicular to the plane of the display panel; an anti-peep film layer, disposed on the light-emitting side of the backlight module, for collimating the light directed toward the anti-peep film layer so as to narrow the scattering angle of the light in a second direction; the second direction being perpendicular to the first direction; a bonding layer, disposed between the display panel and the dimming panel, for connecting the display panel and the dimming panel; the bonding layer comprises bonding glue and a gasket; the bonding glue is disposed between the first peripheral area and the second peripheral area, an orthographic projection of the bonding glue on the display panel is located in the second peripheral area and is not disposed in the second binding area, and an orthographic projection of the bonding glue on the dimming panel is located in the first peripheral area and is not disposed in the first binding area; The orthographic projection of the gasket on the display panel is located in the second binding area, and the orthographic projection of the gasket on the dimming panel is located in the first binding area.

2. The display module according to claim 1, wherein: The anti-peep film layer is disposed between the backlight module and the dimming panel; or, The anti-peep film layer is arranged on a side of the display panel away from the backlight module.

3. The display module according to claim 1 or 2, characterized in that: The dimming panel includes a first polarizer, a first liquid crystal panel, and a second polarizer stacked in sequence, wherein the first polarizer is closer to the backlight module than the second polarizer; The first polarizer and the second polarizer have the same polarization direction.

4. The display module according to claim 3, wherein: The first liquid crystal panel includes at least one first electrode and at least one second electrode.

5. The display module according to claim 3, wherein: The first binding area is close to one side of the dimming panel, the second binding area is close to one side of the display panel, the bonding glue is U-shaped, and the U-shaped opening side of the bonding glue faces the first binding area.

6. The display module according to claim 5, wherein: A glue-free area is provided at the U-shaped opening of the bonding glue.

7. The display module according to claim 5 or 6, characterized in that: One side of the gasket is entirely coated with adhesive, and the other side of the gasket is coated with adhesive at intervals.

8. The display module according to claim 7, wherein: The side of the gasket coated with adhesive on the entire surface faces the dimming panel, and the side of the gasket coated with adhesive at intervals faces the display panel.

9. The display module according to claim 3, wherein: The display panel includes a third polarizer, a second liquid crystal panel, and a fourth polarizer stacked in sequence, wherein the third polarizer is closer to the backlight module than the fourth polarizer; The bonding layer is disposed between the second polarizer and the third polarizer.

10. The display module according to claim 3, wherein: The display panel includes a second liquid crystal panel and a fifth polarizer stacked in sequence, wherein the fifth polarizer is arranged on a side of the second liquid crystal panel away from the dimming panel; The second polarizer is reused as the polarizer of the display panel, and the polarization direction of the second polarizer is perpendicular to that of the fifth polarizer; The bonding layer is disposed between the second polarizer and the second liquid crystal panel.

11. A display device, characterized in that: A display module comprising any one of claims 1 to 10.

12. The display device according to claim 11, wherein Also includes: A flexible circuit board connected to the dimming panel; A driving circuit board is provided with a driving chip, and the driving circuit board is electrically connected to the display panel, the backlight module and the flexible circuit board respectively; the driving circuit board is configured to drive the backlight module and the display panel to work; the driving circuit board is also configured to drive the dimming panel to switch between a non-peeping state and an anti-peeping state.

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