A display module, a driving method of the display module, and a display device

Abstract

Embodiments of the present application provide a display module, a driving method of the display module and a display device. The display module comprises a display panel, a first backlight module and a second backlight module. The first backlight module is located on a backlight side of the display panel, and the second backlight module is located on a side of the first backlight module away from the display panel. One of the first backlight module and the second backlight module is used to provide collimated backlight, and the other is used to provide uniform backlight. The double-backlight design provided by the embodiments of the present application not only ensures the realization of the peep-proof function of the display device, but also eliminates the chroma deviation phenomenon of the display picture when the peep-proof function is turned off.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display, and particularly relates to a display module, a driving method of the display module and a display device.

BACKGROUND

[0002] With the development of display technology, in order to meet the needs of people's life and work, the anti-peeping display gradually becomes a necessary function of electronic devices such as mobile phones and computers, and currently, a light control liquid crystal box is mainly used to control the exit angle of light. In the anti-peeping display, the light control liquid crystal box controls the exit angle of light to be small, so that the exit light is close to the collimated light, the display viewing angle is reduced, and the anti-peeping display is realized. When the anti-peeping display function is turned off, the light control liquid crystal box controls the exit angle of light to be increased, so that the exit angle range of the exit light is increased, and the switching from the anti-peeping display to the normal display is realized.

[0003] However, when the light control liquid crystal box increases the exit angle of light, the phase loss of light occurs, so that the chroma of the display picture is deviated when the anti-peeping function is turned off, and the display effect is affected.

[0004]

CONTENT OF THE APPLICATION

[0005] Therefore, the embodiments of the present application provide a display module, a driving method of the display module and a display device to solve the above problems.

[0006] In a first aspect, the embodiments of the present application provide a display module, which comprises:

[0007] a display panel;

[0008] a first backlight module, which is located on a backlight side of the display panel;

[0009] a second backlight module, which is located on a side of the first backlight module away from the display panel;

[0010] Among the first backlight module and the second backlight module, one is used to provide collimated backlight, and the other is used to provide uniform backlight.

[0011] In a second aspect, the embodiments of the present application provide a driving method of a display module, which comprises driving the display module provided in the first aspect.

[0012] In a third aspect, the embodiments of the present application provide a display device, which comprises being driven by the driving method of the display module provided in the second aspect.

[0013] In this embodiment, by setting a dual backlight module to provide display light with a wider viewing angle range for the display device, the phenomenon of color shift in the displayed image when the privacy function is turned off is eliminated, thus improving the display effect. [Attached Image Description]

[0014] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the structure of a display module related to this application;

[0016] Figure 2 A top view of a display module provided in this application;

[0017] Figure 3 for Figure 2 The diagram shows a cross-sectional view of the display module along the AA' direction.

[0018] Figure 4 A cross-sectional structural diagram of a display module provided in an embodiment of this application;

[0019] Figure 5 A top view of a backlight module provided in this application;

[0020] Figure 6 for Figure 5 The diagram shows a cross-sectional view of the display module along the AA' direction.

[0021] Figure 7 This is a schematic diagram of the structure of a first backlight module;

[0022] Figure 8 This is a schematic diagram of the structure of a first backlight module;

[0023] Figure 9 A top view of a display module provided in this application;

[0024] Figure 10 for Figure 9 The diagram shows a cross-sectional view of the display module along the AA' direction.

[0025] Figure 11 A top view of a display module provided in this application;

[0026] Figure 12 for Figure 11 The diagram shows a cross-sectional view of the display module along the AA' direction.

[0027] Figure 13 This is a schematic diagram of a display device provided in this application.

Detailed Implementation Methods

[0028] To better understand the technical solution of this application, the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0029] It should be understood that the described embodiments are merely some, not all, of the embodiments in this application. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0030] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The singular forms “a,” “the,” and “the” used in the embodiments of this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0031] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0032] In the description of this specification, it should be understood that the terms "substantially", "approximately", "about", "about", "roughly", "generally" and "generally" used in the claims and embodiments of this application refer to values ​​that can be generally agreed upon within a reasonable range of process operations or tolerances, rather than a precise value.

[0033] It should be understood that although terms such as "first," "second," etc., may be used to describe backlight modules, light sources, directions, and areas in the embodiments of this application, these backlight modules, light sources, directions, and areas should not be limited to these terms. These terms are only used to distinguish backlight modules, light sources, directions, and areas from one another. For example, without departing from the scope of the embodiments of this application, a first backlight module may also be referred to as a second backlight module, and similarly, a second backlight module may also be referred to as a first backlight module.

[0034] Through meticulous and in-depth research, the applicant in this case has provided a solution to the problems existing in the prior art.

[0035] Figure 1 This is a schematic diagram of the structure of a display module related to this application.

[0036] like Figure 1As shown, the display module 10' includes a display panel DP, a light control liquid crystal box C and a backlight source L. The light control liquid crystal box C is located on one side of the backlight source L, and the display panel DP is located on the side of the light control liquid crystal box C away from the backlight source L. The backlight source L provides backlight, and the light control liquid crystal box C can control the exit angle of the backlight provided by the backlight source L. The backlight source L can provide collimated backlight. When the display module 10' is in the privacy mode, the light control liquid crystal box C is closed, the exit angle of the backlight is not affected by the light control liquid crystal box C, and the backlight source L can provide collimated backlight for the display panel DP. When the display module 10' is in the sharing mode (non-privacy mode), the light control liquid crystal box C is opened and the exit angle of the collimated backlight is increased. When the display module 10' is in the sharing mode, the collimated backlight will have a phase loss when passing through the light control liquid crystal box C, resulting in a color shift of the display panel 10' and affecting the display effect.

[0037] Figure 2 A top view of a display module provided by an embodiment of the present application, Figure 3 A top view of a display module provided by an embodiment of the present application, Figure 2 A cross-sectional structure diagram of the display module along the AA' direction.

[0038] To solve the above problems, the present application provides a display module 10, which includes a display panel DP, a first backlight module L1 and a second backlight module L2. The first backlight module L1 is located on the backlight side of the display panel DP, and the second backlight module L2 is located on the side of the first backlight module L1 away from the display panel DP, so that the first backlight module L1 is located between the display panel DP and the second backlight module L2. In the direction perpendicular to the surface of the display panel DP, the first backlight module L1 and the second backlight module L2 both overlap the display panel DP. Specifically, in the direction perpendicular to the surface of the display panel DP, the first backlight module L1 and the second backlight module L2 both overlap the display area of the display panel DP.

[0039] Among the first backlight module L1 and the second backlight module L2, one is a collimated backlight module, and the other is a side-in backlight module. For example, the first backlight module L1 is a collimated backlight module for providing collimated backlight for the display panel DP. Then the second backlight module L2 is a side-in backlight module for providing uniform backlight for the display panel DP. For example, the second backlight module L2 is a collimated backlight module for providing collimated backlight for the display panel DP. Then the first backlight module L1 is a side-in backlight module for providing uniform backlight for the display panel DP.

[0040] The collimation degree of the collimated backlight is higher than that of the full-area uniform backlight, and the exit angle of the large-angle light in the collimated backlight is smaller than that of the large-angle light in the full-area uniform backlight. That is, the first backlight module L1 and the second backlight module L2 can both be used to provide the display panel DP with light required for display, and the first backlight module L1 and the second backlight module L2 respectively provide the display panel DP with light of different collimation degrees.

[0041] The viewing angle of the display panel DP when receiving the collimated backlight is smaller than that when receiving the full-area uniform backlight, and thus the collimated backlight meets the requirement of the light source when the display module 10 is in the privacy mode. The viewing angle of the display panel DP when receiving the full-area uniform backlight is larger than that when receiving the collimated backlight, and thus the full-area uniform backlight meets the requirement of the light source when the display module 10 is in the sharing mode (non-privacy mode).

[0042] For the display module provided in the embodiments of the present application, the side-in backlight module can provide the display panel DP with full-area uniform backlight, and the display panel DP no longer needs to adjust the exit angle of the collimated backlight through the light control liquid crystal box C, thereby avoiding the problem that the colorimetric value of the display panel DP is deviated due to the phase loss of the collimated backlight when passing through the light control liquid crystal box C. That is, by arranging the first backlight module L1 and the second backlight module L2, the display module 10 can be provided with backlight of different exit angles when displaying, which not only meets the requirement of the display module 10 in the privacy display, but also eliminates the phenomenon that the colorimetric value of the display panel DP is deviated due to the phase loss of the backlight in the sharing mode.

[0043] In an embodiment of the present application, the first backlight module L1 is a side-in backlight module, and the second backlight module L2 is a collimated backlight module, and the first backlight module L1 is used to provide the display panel DP with full-area uniform backlight, and the second backlight module L2 is used to provide the display panel DP with collimated backlight. That is, the second backlight module L2 for providing the display panel DP with narrow-exit-angle backlight is located on the side of the first backlight module L1 for providing the display panel DP with wide-exit-angle backlight, which is away from the display panel DP.

[0044] In an implementation manner, in combination with Figure 2 and Figure 3 The first backlight module L1 includes a light guide plate L12 and a first light source L11, and the first light source L11 is arranged on the side surface of the light guide plate L12. The light guide plate L12 can be perpendicular to the display panel DP, and the side of the light guide plate L12, which is away from the second backlight module L2, is the light exit surface. The light guide plate L12 is used to scatter the light emitted by the first light source L11, that is, the light emitted by the first light source L11 is converted into full-area uniform backlight and then emitted through the light exit surface. The first light source L11 can be at least one of a light-emitting diode, a cold cathode fluorescent lamp, etc.

[0045] Meanwhile, the light guide plate L12 is configured to transmit the received collimated backlight emitted by the second backlight module L2, and the light transmittance of the light guide plate L12 to the collimated backlight emitted by the second backlight module L2 is greater than or equal to 90%.

[0046] The light guide plate L12 includes a first working state and a second working state, and the light transmittance of the light guide plate L12 in the first working state is greater than that in the second working state.

[0047] For example, when the display panel DP only needs to receive the collimated backlight, the first light source L11 does not emit light, the light guide plate L12 is in the first working state, and the light transmittance of the light guide plate L12 to the collimated backlight is V1. When the display panel DP needs to receive the uniform backlight, the first light source L11 emits light, the light guide plate L12 is in the second working state, and the light transmittance of the light guide plate L12 to the collimated backlight is V2. And V1>V2. In the embodiment of the present application, V1>V2, so that when the display panel DP only receives the collimated backlight, the collimated backlight provided by the second backlight module L2 can be transmitted to the display panel DP through the light guide plate L12.

[0048] In the present implementation, when the display module 10 is in the privacy mode, the first light source L11 does not emit light, the light guide plate L12 is in the first working state, and the light guide plate L12 can be used as a transparent uniform medium to transmit the collimated backlight emitted by the second backlight module L2. When the display module 10 is in the sharing mode, the first light source L11 emits light, the light guide plate L12 is in the second working state, and the light guide plate L12 provides the display panel DP with the uniform backlight, so that the size of the viewing angle of the display picture meets the display requirements of the display module 10 in the sharing mode. At this time, the uniform backlight provided by the first backlight module L1 can be irradiated onto the display panel DP without passing through the light control liquid crystal box C and other structures, thereby solving the chroma deviation problem of the display picture of the display module 10 and enhancing the display effect.

[0049] In an embodiment of the present application, the light guide plate L12 can be a silicon light guide plate, which can be composed of an electrochromic material. When the light guide plate L12 is in the first working state, the light guide plate L12 can be transparent and transmit the collimated backlight emitted by the second backlight module L2.

[0050] In the present embodiment, the silicon light guide plate has a high transmittance to the backlight under the action of an electric field. By using the silicon light guide plate as the light guide plate L12, the loss of the collimated backlight passing through the light guide plate L12 in the first working state can be reduced, and the brightness of the display picture of the display module 10 in the privacy mode can be improved.

[0051] In an embodiment of the present application, the second backlight module L2 includes a plurality of arrayed light sources. For example, in combination withFigure 2 and Figure 3 The second backlight module L2 includes multiple second light sources L21, which are arranged in an array along a first direction X and a second direction Y. Both the first direction X and the second direction Y are parallel to the plane where the second backlight module L2 is located, and the first direction X and the second direction Y intersect. That is, the second backlight module L2 includes multiple second light sources L21 arranged in an array facing the display panel DP. When the second backlight module L2 is a collimated backlight module, the multiple second light sources L21 can provide collimated backlight for the display panel.

[0052] In this embodiment, the multiple arrays of second light sources L21 can provide the display panel DP with collimated backlight that has good uniformity and high collimation, so that the display panel DP can receive backlight with a small emission angle in privacy mode, thereby improving the privacy display effect of the display module 10.

[0053] Figure 4 This is a cross-sectional structural diagram of a display module provided in an embodiment of this application. Figure 5 This is a top view of a display module provided in an embodiment of this application. Figure 6 for Figure 5 The diagram shows a cross-sectional view of the display module along the AA' direction.

[0054] In one embodiment of this application, such as Figure 4 As shown, the second backlight module L2 includes a light-controlling liquid crystal cell L22 and a first backlight structure L23. The first backlight structure L23 can be located on the side of the first backlight module L1 away from the display panel DP. The light-controlling liquid crystal cell L22 is located between the first backlight module L1 and the first backlight structure L23. Along a direction perpendicular to the surface of the display panel DP, the first backlight module L1 can overlap with the light-controlling liquid crystal cell L22.

[0055] When the light-controlled liquid crystal cell L22 is turned on, the backlight emitted by the first backlight structure L23 is collimated when it exits through the light-controlled liquid crystal cell L22. The light-controlled liquid crystal cell L22 adjusts the collimation of the backlight incident on it by controlling the deflection of the liquid crystal, so that the second backlight module L2 emits collimated backlight.

[0056] In one implementation of this application, the first backlight structure L23 is a side-lit backlight structure, which may include a third light source L2a and a secondary light guide plate L2b. The third light source L2a is disposed on the side of the secondary light guide plate L2b, and the side of the secondary light guide plate L2b facing the display panel DP and close to the first backlight module L1 is the light-emitting surface. The secondary light guide plate L2b is used to scatter the light emitted by the received third light source L2a, that is, to convert the light emitted by the third light source L2a into uniform backlight that is emitted through the light-emitting surface. The third light source L2a may be at least one of a light-emitting diode, a cold cathode lamp, etc.

[0057] In the present implementation, the light control liquid crystal box L22 has an advantage of improving the collimation of the backlight. The light control liquid crystal box L22 receives the backlight emitted by the first backlight structure L23 and outputs the collimated backlight, thereby improving the collimation of the collimated backlight emitted by the second backlight module L2, and meeting the requirement of narrow emission angle backlight when the display module 10 is in the privacy mode. Meanwhile, the first backlight structure L23 is a side-in backlight structure, so that the first backlight structure L23 emits uniform backlight when working, thereby further improving the uniformity of the collimated backlight emitted by the second backlight module L2, and optimizing the display effect of the display module 10 in the privacy mode.

[0058] In an embodiment of the present application, in combination with Figure 5 and Figure 6 The second backlight module L2 includes the light control liquid crystal box L22 and the first backlight structure L23, and the light control liquid crystal box L22 is located between the first backlight structure L23 and the first backlight module L1. When the light control liquid crystal box L22 is turned on, the backlight emitted by the first backlight structure L23 is collimated backlight when emitted by the light control liquid crystal box L22. The first backlight structure L23 includes a plurality of second light sources L21, and the second light sources L21 are arranged in an array along a first direction X and a second direction Y, both of which are parallel to the plane in which the second backlight module L2 is located and intersect with each other.

[0059] In the embodiment of the present application, the arrayed second light sources L21 enable a backlight structure L23 to provide collimated backlight with high collimation and good uniformity to the light control liquid crystal box L22. The light control liquid crystal box L22 can easily improve the collimation of the backlight and form collimated backlight. Therefore, the arrayed second light sources L21 are conducive to improving the efficiency of the collimated backlight emitted by the light control liquid crystal box L22, so that the display panel DP can receive collimated backlight with high collimation and uniform light intensity in the privacy mode, thereby improving the privacy display effect of the display module 10.

[0060] In an embodiment of the present application, the second light source L21 can be at least one of a mini light emitting diode (Mini-LED), a micro light emitting diode (Micro-LED), etc.

[0061] In the embodiment of the present application, the second light source L21 has the advantages of small size, high brightness and contrast, and low power consumption, and can support the display panel DP to display pictures for a long time with high resolution. In addition, the second module L2 can emit stable collimated backlight, thereby avoiding flickering of the display module 10 in the privacy mode for a long time, and improving the privacy effect.

[0062] Figure 7 FIG. 1 is a structural schematic diagram of a first backlight module, Figure 8It is a structural schematic diagram of a first backlight module.

[0063] In combination Figure 7 And Figure 8 The first backlight module L1 can further include a lampshade R1 and a light reflection layer R2, and the light guide plate L12 can include a light inlet surface g1 and a light reflection structure g2. The lampshade R1 at least partially surrounds the first light source L11, and the light reflection layer R2 is tightly attached to the inner wall of the lampshade R1 and, together with the lampshade R1, guides the light emitted by the first light source L11 into the light guide plate L12. In order to improve the light guiding efficiency, the light inlet surface g1 of the light guide plate L12 is usually set as an inclined surface, which is substantially perpendicular to the propagation direction of the light guided by the lampshade R1 and the light reflection layer R2.

[0064] The light guide plate L12 can convert the light emitted by the first light source L11, so that the light emitted by the first light source L11 becomes a uniform surface light source after passing through the light guide plate L12. The conversion of the light by the light guide plate L12 is due to the light reflection structure g2 inside the light guide plate L12. The light reflection structure g2 can be a groove structure recessed into the light guide plate L12 from the side of the light guide plate L12 away from the light outlet surface S. When the light emitted by the first light source L11 is incident on the light guide plate through the light inlet surface g1 and irradiates the light reflection structure g2, the light is emitted from the light outlet surface S of the light guide plate L12 after scattering and reflection. It should be noted that, in addition to the light inlet surface g1, the light incident on the light reflection structure g2 can also be guided into the light guide plate L12 by other parts of the light guide plate L12. At this time, the light emitted by the light guide plate L12 can be regarded as a uniform surface light source, and provides a uniform surface backlight for the display module 10. After the uniform surface backlight irradiates the display panel DP without passing through the light control liquid crystal box L22 and other structures, the chroma of the display image of the display module 10 will not deviate.

[0065] As shown in Figure 8 The light inlet surface g1 can be an arc-shaped curved surface recessed into the light guide plate L12 from the side of the light guide plate L12, and the arc-shaped curved surface forms a groove in the light guide plate L12. In fact, the shape of the groove formed by the light inlet surface g1 in the light guide plate L12 is not limited to a spherical shape, and can be one of a pyramid, a cone, a prism, and a cylinder, which is not limited here. The first light source L11 can be placed inside the groove, and the lampshade R1 and the light reflection layer R2 guide the light emitted by the first light source L11 into the light guide plate L12. The light emitted by the first light source L11 is emitted from the light outlet surface S after reflection and scattering in the light guide plate L12 and irradiates the display panel DP.

[0066] By setting the lampshade R1, the light reflection layer R2, the light inlet surface g1, and the light reflection structure g2, the utilization efficiency of the light guide plate L12 for the light emitted by the first light source L11 is improved, the light emitted by the first light source L11 is converted into a uniform backlight, and the light guide plate L12 becomes a surface light source that can provide a uniform surface backlight,

[0067] For the convenience of description, the lampshade R1, the light reflection layer R2, the light inlet surface g1 and the light reflection structure g2 are not shown in the following drawings.

[0068] Figure 9 A top view of a display module provided in the present application is shown in the following figure, Figure 10 For Figure 9 A sectional structure view of the display module shown in the present application along the direction of AA' is shown in the following figure.

[0069] In an embodiment of the present application, in combination with Figure 9 With Figure 10 The display area of the display panel DP includes a first area DP1 and a second area DP2, the first area DP1 is located at the periphery of the second area DP2, that is, the first area DP1 can be regarded as the part of the display area of the display panel DP close to the edge area of the display panel DP. Among them, the first backlight module L1 and / or the second backlight module L2 can be designed differently in the first area DP1 and the second area DP2.

[0070] In the direction perpendicular to the surface where the display module 10 is located, the first backlight module L1 at least partially overlaps the first area DP1, and the first backlight module L1 does not overlap the second area DP2. For example, in combination with Figure 9 With Figure 10 In the direction perpendicular to the surface where the display module 10 is located, the light guide plate L12 of the first backlight module L1 overlaps the first area DP1, and the first backlight module L1 does not overlap the second area DP2.

[0071] In the embodiments of the present application, the curvature of the edge area of the display panel DP is generally large, so the display light emitted by the edge area of the display panel DP is strongly affected by optical phenomena such as reflection and interference, resulting in uneven distribution of display light of different viewing angles emitted by the edge area. In particular, when the viewing angle range of the backlight incident on the display panel DP is small, the phenomenon of uneven distribution of display light of different viewing angles emitted by the edge area is more obvious, resulting in color cast of the display picture. In order to improve the color cast problem, the light guide plate L12 can be provided to provide the edge area of the display panel DP with backlight having a wide viewing angle range and uniform light intensity distribution, and weaken the influence of display light on reflection and interference. In the display module 10 in the sharing mode, the first area DP1 of the display panel DP receives the backlight from the light guide plate L12 of the first backlight module L1, and emits display light with uniform light intensity distribution at different viewing angles, which improves the color cast phenomenon of the edge area of the display panel DP, and saves the process cost.

[0072] In an implementation, the second backlight module L2 overlaps with the second region DP2 in a direction perpendicular to the surface on which the display module 10 is located. In the sharing mode, the first backlight module L1 can provide backlight for the first region DP1 of the display panel DP, and the second backlight module L2 can provide backlight for the second region DP2 of the display panel DP, so as to realize normal display of the display panel DP.

[0073] Further, the second backlight module L2 can cover the display area of the display panel DP in a direction perpendicular to the surface on which the display module 10 is located.

[0074] Optionally, in the sharing mode, the first backlight module L1 can provide backlight for the first region DP1 of the display panel DP, and the second backlight module L2 can provide backlight for the second region DP2 of the display panel DP and not provide backlight for the first region DP1 of the display panel DP. In this case, the second backlight module L2 can emit light in a partitioned manner.

[0075] Optionally, in the sharing mode, the first backlight module L1 can provide backlight for the first region DP1 of the display panel DP, and the second backlight module L2 can provide backlight for the first region DP1 and the second region DP2 of the display panel DP. In this case, the second backlight module L2 can emit light in an overall manner.

[0076] As shown in FIG. 1, the display panel DP has a first region DP1 and a second region DP2. The first region DP1 is located on one side of the display panel DP, and the second region DP2 is located on the other side of the display panel DP. Figure 10 As shown in FIG. 1, the display panel DP has a first region DP1 and a second region DP2. The first region DP1 is located on one side of the display panel DP, and the second region DP2 is located on the other side of the display panel DP.

[0077] In the embodiments of the present application, the light exit surface of the first region DP1 is curved, so that the light emitted by the first region DP1 of the display panel DP to the front view angle is large-angle light. The attenuation degrees of light of different colors are different, which leads to a larger degree of chromaticity shift. Therefore, the first backlight module L1 can be arranged only below the first region DP1. The chromaticity shift problem is solved while the process cost is saved.

[0078] Figure 11 FIG. 1 shows a top view of a display module provided in the present application, Figure 12 FIG. 2 shows a sectional structure diagram of the display module along the AA' direction shown in FIG. 1. Figure 11

[0079] ​In an embodiment of the present application, the display area of the display panel DP includes a first region DP1 and a second region DP2, the first region DP1 is located at the periphery of the second region DP2. In the direction perpendicular to the surface on which the display module 10 is located, the second backlight module L2 at least partially overlaps the first region DP1, and the second backlight module L2 does not overlap the second region DP2. That is, the second backlight module L2 only overlaps the part of the display area of the display panel DP close to the edge region and does not overlap the part of the display area of the display panel DP away from the edge region.

[0080] For example, in combination with Figure 11 and Figure 12 , in the direction perpendicular to the surface on which the display module 10 is located, the second backlight module L2 overlaps the first region DP1 and does not overlap the second region DP2, then when the display module 10 is in the privacy mode, the first region DP1 of the display panel DP receives the collimated backlight emitted by the second backlight module L2.

[0081] In an embodiment of the present application, the display panel DP has a wider viewing angle in the edge region relative to the second region DP2, then the content displayed in the edge region of the display panel DP is more likely to be seen by the observer at a large viewing angle. The privacy function can be provided only in the edge region of the display panel DP, so that the edge region of the display panel DP receives the collimated backlight with a small emission angle, meeting the requirement of the display module 10 in the privacy mode, while saving the process cost.

[0082] In an implementation manner, in the direction perpendicular to the surface on which the display module 10 is located, the first backlight module L1 can cover the display area of the display panel DP. Then in the privacy mode, the second backlight module L2 can provide backlight for the first region DP1 of the display panel DP, and the first backlight module L1 can provide backlight for the second region DP2 of the display panel DP and does not provide backlight for the first region DP1 of the display panel DP, to realize normal display of the display panel DP, at this time the first backlight module L1 can emit light in a partitioned manner.

[0083] Optionally, in the sharing mode, the first backlight module L1 can provide backlight for the display area of the display panel DP, and the second backlight module L2 can provide backlight for the first region DP1 of the display panel DP.

[0084] Optionally, in the sharing mode, the first backlight module L1 can provide backlight for the display area of the display panel DP, and the second backlight module L2 can not provide backlight for the first region DP1 of the display panel DP.

[0085] In the privacy mode, the second backlight module L2 can provide collimated backlight only for the first region DP1. For example, when the privacy function of the display device is designed, the viewing angle of the display panel DP at the edge region is usually reduced, that is, the privacy design is only performed at the edge region of the display panel DP. Meanwhile, the first backlight module L1 can provide uniform backlight for the second region DP2, so that when the privacy function of the display module 10 is turned off, the chroma of the display panel DP is normal, the display effect is improved, and the process cost is saved.

[0086] The application provides a driving method of the display module 10, which is used for driving the display module 10 to display.

[0087] In one embodiment of the application, the driving method of the display module 10 comprises:

[0088] In the privacy mode, at least one of the first backlight module L1 and the second backlight module L2 provides backlight for the display panel DP.

[0089] In the sharing mode, at least one of the first backlight module L1 and the second backlight module L2 provides backlight for the display panel DP.

[0090] For example, in combination with Figure 11 and Figure 12 , the second backlight module L2 is a collimated backlight module, and in the privacy mode, the second backlight module L2 provides backlight for the first region DP1 of the display panel DP, and the first backlight module L1 provides backlight for the second region DP2, so that the edge privacy of the display panel is met, and the process cost is saved.

[0091] For example, in combination with Figure 9 and Figure 10 , the first backlight module L1 is a side-in backlight module, and in the sharing mode, the first backlight module L1 provides backlight for the first region DP1 of the display panel DP, and the second backlight module L2 provides backlight for the second region DP2, so that the sharing of the display panel is met, and the color deviation of the edge region of the display panel is weakened.

[0092] In one embodiment of the application, the driving method of the display module 10 comprises:

[0093] In the privacy state, one of the first backlight module L1 and the second backlight module L2, which is the collimated backlight module, provides backlight to the display panel DP;

[0094] In the sharing state, one of the first backlight module L1 and the second backlight module L2, which is the edge-lit backlight module, provides backlight to the display panel DP.

[0095] In an implementation form of the embodiment, as shown in Figure 3 the first backlight module L1 and the second backlight module L2 both overlap with the display area of the display panel DP in the direction perpendicular to the surface on which the display module 10 is located, the first backlight module L1 is an edge-lit backlight module, and the second backlight module L2 is a collimated backlight module. Then in the privacy state, the second backlight module L2 can provide collimated backlight to the display area of the display panel DP, and the first backlight module L1 does not provide backlight to the display panel DP.

[0096] In an implementation form of the embodiment, as shown in Figure 3 the first backlight module L1 and the second backlight module L2 both overlap with the display area of the display panel DP in the direction perpendicular to the surface on which the display module 10 is located, the first backlight module L1 is an edge-lit backlight module, and the second backlight module L2 is a collimated backlight module. Then in the sharing state, the first backlight module L1 can provide full-area uniform backlight to the display area of the display panel DP, and the second backlight module L2 does not provide backlight to the display panel DP.

[0097] In the embodiment of the application, by setting different backlight modules to provide backlight for the display module 10, the display panel DP only receives collimated backlight in the privacy state and only receives full-area uniform backlight in the sharing state, which meets the needs of the display module 10 for privacy display and sharing display, and the problem of chroma deviation of the display picture in the sharing state can be solved without adjusting the exit angle of the backlight by using the light control liquid crystal box L22.

[0098] In an embodiment of the application, in combination with Figure 9 and Figure 10 the first backlight module L1 is an edge-lit backlight module, the second backlight module L2 is a collimated backlight module, and the display area of the display panel DP includes a first region DP1 and a second region DP2. The first region DP1 is located at the periphery of the second region DP2. In the direction perpendicular to the surface on which the display module 10 is located, the first backlight module L1 at least partially overlaps with the first region DP1, and the first backlight module L1 does not overlap with the second region DP2.

[0099] The driving method provided by the embodiment of the application includes:

[0100] In the privacy state, the second backlight module L2 provides backlight to the display panel DP;

[0101] In the sharing state, the first backlight module L1 provides backlight for the display panel DP, and at least a portion of the second backlight module L2 overlapping with the second region DP2 provides backlight for the display panel DP.

[0102] In an implementation manner of the embodiment, the second backlight module L2 overlaps with the second region DP2 in the direction perpendicular to the surface on which the display module 10 is located. In the sharing state, the first backlight module L1 can provide backlight for the first region DP1 of the display panel DP, and the second backlight module L2 can provide backlight for the second region DP2 of the display panel DP, so as to realize normal display of the display panel DP.

[0103] Further, for example, as shown in FIGS. 11, 12, and 13, the second backlight module L2 can cover the display area of the display panel DP in the direction perpendicular to the surface on which the display module 10 is located. In the privacy state, the first backlight module L1 does not provide backlight, and the second backlight module L2 provides backlight for the first region DP1 and the second region DP2 of the display panel DP, and at this time, the second backlight module L2 can emit light on the whole surface. Figure 3 Figure 12 Figure 13

[0104] Optionally, in the sharing state, the first backlight module L1 can provide backlight for the first region DP1 of the display panel DP, and the second backlight module L2 can provide backlight for the second region DP2 of the display panel DP and does not provide backlight for the first region DP1 of the display panel DP, and at this time, the second backlight module L2 can emit light in a partitioned manner.

[0105] Optionally, in the sharing state, the first backlight module L1 can provide backlight for the first region DP1 of the display panel DP, and the second backlight module L2 can provide backlight for the first region DP1 and the second region DP2 of the display panel DP, and at this time, the second backlight module L2 can emit light on the whole surface to meet the requirement of higher display brightness of the edge region of the display panel DP.

[0106] In the embodiment of the application, the curvature of the first region DP1 is larger than that of the second region DP2, and thus the display light emitted by the first region DP1 is more strongly affected by optical phenomena such as reflection and interference, resulting in uneven distribution of display light of different viewing angles emitted by the edge region, so that color cast is formed in the display picture. Therefore, the side-in backlight module can be arranged to provide backlight with a wide viewing angle range and uniform light intensity distribution for the first region DP1, so as to weaken the color cast phenomenon. In the sharing mode of the display module 10, the first region DP1 of the display panel DP receives uniform backlight on the whole surface, and the display light emitted at different viewing angles has uniform light intensity distribution, which improves the color cast phenomenon of the edge region of the display panel DP, and saves the process cost.

[0107] ​​​In an embodiment of the present application, the first backlight module L1 is a side-in backlight module, and the second backlight module L2 is a collimating backlight module. The display area of the display panel DP includes a first region DP1 and a second region DP2, and the first region DP1 is located at the periphery of the second region DP2. In combination with Figure 11 and Figure 12 , along the direction perpendicular to the surface where the display module 10 is located, the second backlight module L2 at least partially overlaps the first region DP1, and the second backlight module L2 does not overlap the second region DP2. The driving method provided in the embodiment of the present application includes:

[0108] In the privacy state, the second backlight module L2 provides backlight to the display panel DP, and at least the part of the first backlight module L1 overlapping the second region DP2 provides backlight to the display panel DP;

[0109] In the sharing state, the first backlight module L1 provides backlight to the display panel DP.

[0110] In an implementation manner of the present application, along the direction perpendicular to the surface where the display module 10 is located, the first backlight module L1 can cover the display area of the display panel DP. Then in the privacy state, the second backlight module L2 can provide backlight for the first region DP1 of the display panel DP, the first backlight module L1 can provide backlight for the second region DP2 of the display panel DP and does not provide backlight for the first region DP1 of the display panel DP, at this time, the first backlight module L1 can emit light in a partitioned manner.

[0111] Optionally, in the sharing state, the first backlight module L1 can provide backlight for the display area of the display panel DP, and the second backlight module L2 can provide backlight for the first region DP1 of the display panel DP.

[0112] Optionally, in the sharing state, the first backlight module L1 can provide backlight for the display area of the display panel DP, and the second backlight module L2 can not provide backlight for the first region DP1 of the display panel DP.

[0113] In the actual display process of the display module 10, compared with the second region DP2, the picture displayed by the first region DP1 of the display panel DP is more likely to be snooped, and therefore the privacy can be prevented only at the edge of the display module 10. In the embodiment of the present application, along the direction perpendicular to the surface where the display module 10 is located, the design that the second backlight module L2 does not overlap the second region DP2 meets the requirement of the privacy display of the display module 10 while saving the process cost. In the sharing state, the first backlight module L1 can emit light in an integral manner, and the second backlight module L2 also provides backlight for the display panel DP, so as to meet the requirement of higher display brightness of the edge region of the display panel DP.

[0114] Figure 13A display device schematic diagram provided by the present application.

[0115] As shown in Figure 13 The present application provides a display device 20, the display device 20 comprises the display module 10 provided by the above embodiment. The display device 20 can be a mobile phone, in addition, the display device 20 can also be a computer, a television and other electronic equipment.

[0116] The display device 20 provided by the embodiment of the present application greatly improves the phenomenon of chromaticity deviation of the display screen when the anti-peeping function is turned off.

[0117] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A display module, characterized by The display module comprises: a display panel; a first backlight module located on a backlight side of the display panel; a second backlight module located on a side away from the display panel of the first backlight module; the first backlight module is a side-in backlight module, and the second backlight module is a collimated backlight module; a display area of the display panel comprises a first region and a second region, and the first region is located on a periphery of the second region; wherein, in a direction perpendicular to a surface on which the display module is located, the first backlight module at least partially overlaps with the first region, and the first backlight module does not overlap with the second region; the second backlight module covers the display area of the display panel; and the second backlight module emits light in a partitioned manner; alternatively, in a direction perpendicular to a surface on which the display module is located, the second backlight module at least partially overlaps with the first region, and the second backlight module does not overlap with the second region; the first backlight module covers the display area of the display panel; and the first backlight module emits light in a partitioned manner.

2. The display module of claim 1, wherein, The second backlight module comprises a light control liquid crystal box and a first backlight structure, and the light control liquid crystal box is located between the first backlight structure and the first backlight module. When the light control liquid crystal box is opened, the collimated backlight emitted by the first backlight structure is emitted through the light control liquid crystal box.

3. The display module of claim 2, wherein, The first backlight structure is a side-in backlight structure.

4. The display module of claim 2, wherein, The first backlight structure comprises a plurality of second light sources, and the second light sources are arranged in an array in a first direction and a second direction, the first direction and the second direction are both parallel to a surface on which the second backlight module is located, and the first direction and the second direction intersect.

5. The display module of claim 4, wherein, The second light source is at least one of a sub-millimeter light-emitting diode and a micro light-emitting diode.

6. The display module of claim 1, wherein, The second backlight module comprises a plurality of arrayed light sources.

7. The display module of claim 1, wherein, In a direction perpendicular to a surface on which the display module is located, when the first backlight module at least partially overlaps with the first region, and the first backlight module does not overlap with the second region, the light-emitting surface of the display panel in the first region is a curved surface.

8. A driving method for a display module, characterized in that, The driving method is used for driving the display module to display, and the display state of the display module comprises a shared state and a privacy state. wherein, in a direction perpendicular to a surface on which the display module is located, the first backlight module at least partially overlaps with the first region, and the first backlight module does not overlap with the second region; the driving method comprises: in the privacy state, the second backlight module provides backlight to the first region and the second region of the display panel, and the first backlight module does not provide backlight; in the shared state, the first backlight module provides backlight to the first region of the display panel, and at least a portion of the second backlight module overlapping with the second region provides backlight to the display panel, and the second backlight module emits light in a partitioned manner; alternatively, The second backlight module at least partially overlaps with the first area in a direction perpendicular to a surface on which the display module is located, and the second backlight module does not overlap with the second area; the driving method comprises: In the privacy state, the second backlight module provides backlight to the first area of the display panel, the first backlight module provides backlight to the second area of the display panel and does not provide backlight to the first area of the display panel, and the first backlight module emits light in a partitioned manner; In the sharing state, the first backlight module provides backlight to the display area of the display panel.

9. A display device, characterized by comprising: The display module comprises any one of claims 1-7.

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