Backlight module and display device

Abstract

This application belongs to the field of display technology, and particularly relates to a backlight module and a display device. The backlight module further includes a light-emitting component, and the light-emitting component includes a first light-emitting part, a privacy layer, and a second light-emitting part. The privacy layer is disposed between the first light-emitting part and the second light-emitting part; the first light-emitting part includes a first substrate and a first light-emitting element disposed on the first substrate, and the second light-emitting part includes a second substrate and a second light-emitting element disposed on the second substrate. The orthographic projection of the first light-emitting element on the second substrate does not overlap with the second light-emitting element; the backlight module has a first light-emitting state and a second light-emitting state. In the first light-emitting state, the first light-emitting element emits light and the second light-emitting element does not emit light; in the second light-emitting state, the first light-emitting element does not emit light, and at least part of the second light-emitting elements emit light. After the light emitted by the second light-emitting element passes through the privacy layer, collimated light is emitted. The solution of this application can freely switch between a normal display mode and a privacy display mode.

Description

Technical Field

[0001] This application belongs to the technical field of display, and particularly relates to a backlight module and a display device. Background Art

[0002] With the continuous development of display technology, various display devices bring various visual experiences to users. Currently, up to 70% of users will access private information through electronic products in various public places. Therefore, the anti-peeping display technology for private information needs to be developed.

[0003] Currently, due to the large light-emitting viewing angle of liquid crystal display devices in space, it has become increasingly easy to peep at the screen information, thus affecting the security of information. For example, for some users, they will read some confidential information in public places. Due to the large light-emitting viewing angle of liquid crystal display devices, it will be seen by others around, thus bringing inconvenience to the users. Therefore, developing liquid crystal display devices with anti-peeping functions has become the development trend of liquid crystal display devices. Summary of the Invention

[0004] The purpose of this application is to provide a backlight module and a display device that can freely switch between a normal display mode and an anti-peeping display mode.

[0005] In the first aspect of this application, a backlight module is provided. The backlight module includes a back plate, and a receiving cavity is provided on the back plate. The backlight module further includes:

[0006] A light-emitting component, the light-emitting component is arranged in the receiving cavity. The light-emitting component includes a first light-emitting part, an anti-peeping layer, and a second light-emitting part. The anti-peeping layer is arranged between the first light-emitting part and the second light-emitting part, and the second light-emitting part is connected to the bottom wall of the receiving cavity. The first light-emitting part includes a first substrate and a first light-emitting element arranged on the first substrate. The second light-emitting part includes a second substrate and a second light-emitting element arranged on the second substrate. The orthographic projection of the first light-emitting element on the second substrate does not overlap with the second light-emitting element.

[0007] Wherein, the backlight module has a first light-emitting state and a second light-emitting state. In the first light-emitting state, the first light-emitting element emits light, and the second light-emitting element does not emit light. In the second light-emitting state, the first light-emitting element does not emit light, and at least part of the second light-emitting elements emit light. After the light emitted by the second light-emitting element passes through the anti-peeping layer, collimated light is emitted.

[0008] In an exemplary embodiment of this application, the first substrate includes a wiring area and a plurality of non-wiring areas arranged in an array. The wiring area surrounds the non-wiring areas.

[0009] The second light-emitting element corresponds to the non-wiring area.

[0010] In an exemplary embodiment of the present application, the orthographic projection of the second light-emitting element on the first substrate is located within the non-wiring area.

[0011] In an exemplary embodiment of the present application, the first light-emitting component further includes a first reinforcement member, which is disposed on the first substrate and surrounds the first light-emitting element.

[0012] In an exemplary embodiment of the present application, the height of the first reinforcement member is equal to or greater than the height of the first light-emitting element.

[0013] In an exemplary embodiment of the present application, the second light-emitting component further includes a second reinforcement member, which is disposed on the second substrate and surrounds the second light-emitting element.

[0014] In an exemplary embodiment of the present application, the height of the second reinforcement member is equal to or greater than the height of the second light-emitting element.

[0015] In an exemplary embodiment of the present application, one side of the anti-peeping layer is adhesively connected to the side of the first substrate close to the second substrate, and the other side of the anti-peeping layer is adhesively connected to the side of the second reinforcement member away from the second substrate.

[0016] In an exemplary embodiment of the present application, the orthographic projection of the anti-peeping layer on the second substrate overlaps with the second substrate; and / or

[0017] The area of the first substrate is the same as the area of the second substrate.

[0018] A second aspect of the present application provides a display device, including a display panel and the backlight module described in any one of the above, and the display panel is disposed on the light-emitting side of the backlight module; when the backlight module is in the first light-emitting state, the display device is in a normal display mode, and when the backlight module is in the second light-emitting state, the display device is in an anti-peeping display mode.

[0019] The backlight module and the display device of the present application at least have the following beneficial effects:

[0020] The backlight module includes a first light-emitting component, a privacy layer, and a second light-emitting component. In the first light-emitting state, the first light-emitting element in the first light-emitting component emits light, and the second light-emitting element in the second light-emitting component does not emit light. At this time, the display device is in the normal display stage. In the second light-emitting state, the first light-emitting element in the first light-emitting component does not emit light, and some of the second light-emitting elements in the second light-emitting component emit light. The light emitted by the second light-emitting element is processed by the privacy layer and then emits collimated light, narrowing the light emission range. At this time, the display device is in the privacy display stage. That is to say, the present application realizes the switching between the normal display mode and the privacy display mode of the display device by controlling the on / off of the first light-emitting element and the second light-emitting element and by processing the light emitted by the second light-emitting element through the privacy layer, and the switching scheme is simpler. In addition, by controlling the opening state of some of the second light-emitting components, local privacy or unilateral privacy can also be achieved.

[0021] Other features and advantages of the present application will become apparent from the following detailed description, or will be learned in part from the practice of the present application.

[0022] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings herein are incorporated into the specification and form a part of the specification, showing embodiments consistent with the present application, and are used together with the specification to explain the principles of the present application. Obviously, the drawings in the following description are only some embodiments of the present application, and those of ordinary skill in the art can obtain other drawings based on these drawings without creative efforts.

[0024] Figure 1 Shows a schematic structural diagram of the second reinforcement member having the same height as the second light-emitting element provided in the first embodiment or the third embodiment of the present application;

[0025] Figure 2 Shows a schematic structural diagram of the second reinforcement member being higher than the second light-emitting element provided in the first embodiment or the third embodiment of the present application;

[0026] Figure 3 Shows a schematic structural diagram of the first light-emitting component provided in the first embodiment, the second embodiment, or the third embodiment of the present application;

[0027] Figure 4 Shows a schematic structural diagram of the second light-emitting component provided in the first embodiment, the second embodiment, or the third embodiment of the present application;

[0028] Figure 5 Shows a schematic structural diagram of the top view of the backlight module provided in the first embodiment, the second embodiment, or the third embodiment of the present application;

[0029] Figure 6 Shows a schematic structural diagram of the backlight module provided in Embodiment 1 or Embodiment 3 of the present application in the first light-emitting state;

[0030] Figure 7 Shows a schematic structural diagram of the backlight module provided in Embodiment 1 or Embodiment 3 of the present application in the second light-emitting state;

[0031] Figure 8 Shows a schematic layout structure diagram of the wiring area and non-wiring area on the first substrate provided in Embodiment 1, Embodiment 2 or Embodiment 3 of the present application;

[0032] Figure 9 Shows a schematic layout structure diagram of the circuits on the second substrate provided in Embodiment 1, Embodiment 2 or Embodiment 3 of the present application;

[0033] Figure 10 Shows a schematic structural diagram of the partial anti-peeking provided in Embodiment 1, Embodiment 2 or Embodiment 3 of the present application;

[0034] Figure 11 Shows a schematic structural diagram of the backlight module provided in Embodiment 2 or Embodiment 3 of the present application;

[0035] Figure 12 Shows a schematic structural diagram of the connection between the display panel and the backlight module provided in Embodiment 1, Embodiment 2 or Embodiment 3 of the present application.

[0036] Description of reference numerals:

[0037] 10. Backlight module; 100. Light-emitting component; 110. First light-emitting part; 111. First substrate; 1110. Wiring area; 1111. Non-wiring area; 112. First light-emitting element; 113. First reinforcement member; 120. Anti-peeking layer; 130. Second light-emitting part; 131. Second substrate; 132. Second light-emitting element; 133. Second reinforcement member; 20. Display panel. Detailed implementation manners

[0038] Now, the exemplary embodiments will be described more comprehensively with reference to the accompanying drawings. However, the exemplary embodiments can be implemented in various forms and should not be construed as limited to the examples set forth herein; on the contrary, these embodiments are provided so that this application will be more complete and comprehensive, and the concept of the exemplary embodiments will be fully conveyed to those skilled in the art.

[0039] In this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this application, "a plurality" means two or more unless otherwise specifically defined.

[0040] In this application, unless otherwise clearly specified and defined, terms such as "assembly" and "connection" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0041] In addition, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of the embodiments of this application. However, those skilled in the art will realize that the technical solutions of this application can be practiced without one or more of the specific details, or other methods, components, devices, steps, etc. may be adopted. In other cases, well-known methods, devices, implementations, or operations are not shown or described in detail to avoid obscuring various aspects of this application.

[0042] Embodiment 1

[0043] Embodiment 1 of this application provides a backlight module 10, which includes a backplane. The backplane can be integrally made of a metal light-tight material. The backplane is provided with a receiving cavity, which can be used to receive the light-emitting component 100 described below.

[0044] It can be understood that the backlight module 10 in the embodiments of this application can be a direct-lit backlight module 10.

[0045] In some embodiments of this application, referring to Figure 1 or Figure 2 as shown, this backlight module 10 further includes a light-emitting component 100. The light-emitting component 100 includes a first light-emitting part 110, a privacy layer 120, and a second light-emitting part 130.

[0046] In some embodiments of this application, please continue to refer to Figure 1 and Figure 2As shown, the first light-emitting component 110, the anti-peeking layer 120, and the second light-emitting component 130 are arranged in sequence in the depth direction of the accommodation cavity. The anti-peeking layer 120 is disposed between the first light-emitting component 110 and the second light-emitting component 130. The second light-emitting component 130 is disposed at the bottom of the accommodation cavity and is connected to the bottom wall of the accommodation cavity. That is, the first light-emitting component 110 is disposed above the second light-emitting component 130, and the first light-emitting component 110 is closer to the display panel 20.

[0047] It should be noted that this light-emitting assembly 100 may also include multiple light-emitting components, and an anti-peeking layer 120 is disposed between adjacent light-emitting components, which can be specifically designed according to different embodiments.

[0048] Among them, please refer to Figure 3 As shown, the first light-emitting component 110 includes a first substrate 111 and a first light-emitting element 112. The first substrate 111 can be made of transparent materials such as transparent glass, polyester, and polyimide, and this first substrate 111 should be able to withstand a certain high temperature to avoid damage to the first substrate 111 caused by the heat generated by the first light-emitting element 112. Of course, the material of the first substrate 111 can also be other materials with good electrical characteristics and high light transmittance, which is not limited in this application.

[0049] Please continue to refer to Figure 3 As shown, multiple first light-emitting elements 112 are arranged in an array on the first substrate 111. That is, multiple first light-emitting elements 112 are arranged in sequence in the row direction of the first substrate 111, and multiple first light-emitting elements 112 are arranged in sequence in the column direction of the first substrate 111.

[0050] Please refer to Figure 4 As shown, the second light-emitting component 130 includes a second substrate 131 and a second light-emitting element 132. The second substrate 131 can be made of transparent materials such as transparent glass, polyester, and polyimide, and this second substrate 131 should be able to withstand a certain high temperature to avoid damage to the first substrate 111 caused by the heat generated by the second light-emitting element 132. Of course, the material of the second substrate 131 can also be other materials with good electrical characteristics and high light transmittance, which is not limited in this application.

[0051] Please continue to refer to Figure 1 and Figure 4 As shown, multiple second light-emitting elements 132 are arranged in an array on the second substrate 131. That is, multiple second light-emitting elements 132 are arranged in sequence in the row direction of the first substrate 111, and multiple second light-emitting elements 132 are arranged in sequence in the column direction of the first substrate 111. Moreover, the orthographic projection of the second light-emitting element 132 on the first substrate 111 does not overlap with the first light-emitting element 112, that is, the first light-emitting element 112 and the second light-emitting element 132 are arranged in a staggered manner up and down.

[0052] It can be understood that the orthographic projection of this second light-emitting element 132 on the first substrate 111 may be located between two first light-emitting elements 112 in adjacent rows and in the same column as the two first light-emitting elements 112; it may also be located between two first light-emitting elements 112 in adjacent columns and in the same row as the two first light-emitting elements 112; or it may be that the orthographic projection of this first light-emitting element 112 on the second substrate 131 is in a different column and a different row from the second light-emitting element 132, that is, the second light-emitting element 132 is located within the space enclosed by the orthographic projections of four adjacent first light-emitting elements 112 on the second substrate 131. Please refer to Figure 5 as shown.

[0053] For example, please continue to refer to Figure 5 as shown. For the sake of convenience of description, the second light-emitting element 132 on the second substrate 131 is projected onto the first substrate 111, and in this section, the second light-emitting element 132 and the first light-emitting element 112 are described as being on the same plane. The two first light-emitting elements 112 in adjacent rows and the same column on the first substrate 111 are the first light-emitting element L1 and the first light-emitting element L2 respectively, the first light-emitting element L3 in the same row as the first light-emitting element L1 and in an adjacent column, and the first light-emitting element L4 in the same row and the same column as the first light-emitting element L2; that is to say, the first light-emitting element L3 and the first light-emitting element L4 are in the same column, the first light-emitting element L1 and the first light-emitting element L3 are in the same row, and the first light-emitting element L2 and the first light-emitting element L4 are in the same row. The second light-emitting element 132 is located within the space enclosed by the first light-emitting element L1, the first light-emitting element L2, the first light-emitting element L3, and the first light-emitting element L4. In addition, the connection line between the first light-emitting element L1 and the first light-emitting element L4 intersects the connection line between the first light-emitting element L2 and the first light-emitting element L3, and the intersection point of the two connection lines is the central symmetry point of the second light-emitting element 132, that is, the distance from the edge of the second light-emitting element 132 to the four adjacent first light-emitting elements 112 is equal. By arranging the second light-emitting element 132 between the four adjacent first light-emitting elements 112 and at the center point of the space enclosed by the four first light-emitting elements 112, it can be ensured that the brightness of the light emitted from the bottom of the second light-emitting element 132 in any direction is the same and the light blocking effect is the same, without color deviation, thus ensuring the display effect.

[0054] It is worth mentioning that, in order to ensure the display effect, both the first light-emitting element 112 and the second light-emitting element 132 use the same type of light source, such as a light-emitting diode (LED), a micro light-emitting diode (Micro LED), a mini light-emitting diode (Mini LED), etc.

[0055] It can be understood that when the first light-emitting element 112 and the second light-emitting element 132 emit light simultaneously, the display effect can be achieved. Compared with setting the same number of light-emitting elements on the same substrate, the first light-emitting element 112 and the second light-emitting element 132 in the present application are arranged in a staggered up-and-down manner, which can reduce the design number of light-emitting elements on the same substrate, optimize the layout of the circuits on the substrate more, and reduce the number of light-emitting elements. The transfer, installation, and replacement of the light-emitting elements are also more convenient.

[0056] In addition, when the light-emitting element uses a mini light-emitting diode (Mini LED), the distance between adjacent light-emitting elements is small. If the existing technology is used to design the light-emitting elements, that is, when all the light-emitting elements are set on one substrate, the wiring is more difficult, and the design of the light-emitting elements and the circuits is more difficult. However, in the present application, the number of light-emitting elements used on one substrate is reduced, and the design of the light-emitting elements and the circuits is more reasonable. In addition, the first light-emitting component 110 and the second light-emitting component 130 adopt a double-layer up-and-down design method, and more light-emitting elements can be designed to realize the setting of more mini light-emitting diodes, improving the display brightness.

[0057] It should be noted that refer to Figure 6 and Figure 7As shown, this backlight module 10 has a first lighting state and a second lighting state. In the first lighting state, the first lighting element 112 emits light, and the second lighting element 132 does not emit light. At this time, the light rays directed towards the display panel 20 are the light rays emitted by the first lighting element 112. Since the anti-peeking layer 120 is disposed below the first substrate 111, the first lighting element 112 enters the display panel 20 after passing through the optical components to complete the display. At this time, it is in the normal display mode. In the second lighting state, the first lighting element 112 does not emit light, and at least some of the second lighting elements 132 emit light. The second lighting elements 132 are disposed at the bottom of the anti-peeking layer 120. Then, the light rays emitted by the second lighting elements 132 will enter the display panel 20 after being processed by the anti-peeking layer 120. And since the second lighting elements 132 emit collimated light rays after being processed by the anti-peeking layer 120. That is to say, when the backlight module 10 is in the second lighting state, the light rays entering the display panel 20 are collimated light rays, and the angle of the light rays entering the display panel 20 is small, so that the anti-peeking display mode of the display device can be realized.

[0058] That is, by switching the on-off states of the first lighting element 112 and the second lighting element 132, the normal display mode and the anti-peeking display mode are switched, and this switching method is simpler and more convenient.

[0059] It can be understood that in order to control the on-off states of the first lighting element 112 and the second lighting element 132, this backlight module 10 further includes a control module. The control module is electrically connected to the first lighting element 112 and the second lighting element 132, and is used to control the lighting states of the first lighting element 112 and the second lighting element 132, so that the backlight module 10 can be switched between the first lighting state and the second lighting state.

[0060] In addition, this control module includes a control chip, which is used to determine the lighting state of the display panel 20. The type of the control chip is not limited in this application.

[0061] In order to facilitate the electrical connection between the first lighting element 112 and the control module, a plurality of electric wires are provided on the first substrate 111. The electric wires are used for the electrical connection between the first lighting element 112 and the control module. These electric wires can be made of fine metal materials or other materials with good conductor properties, such as transparent materials like indium tin oxide, etc., which are not limited in this application.

[0062] Please refer to Figure 8 As shown, in order to reasonably plan the area of the first substrate 111 and avoid blocking the light rays emitted by the second lighting element 132, a wiring area 1110 and a non-wiring area 1111 are provided on the first substrate 111. The wiring area 1110 is disposed around the non-wiring area 1111, and the non-wiring area 1111 corresponds to the second lighting element 132.

[0063] Moreover, the wire routing area 1110 is used for arranging electric wires, and the non-wire routing areas 1111 are arranged in an array on the first substrate 111, spaced apart in the row direction and the column direction. The first light-emitting element 112 is located within the wire routing area 1110 to facilitate the electrical connection between the first light-emitting element 112 and the control module. Since the non-wire routing area 1111 corresponds to the second light-emitting element 132, the non-wire routing area 1111 is also located within the space formed by four adjacent first light-emitting elements 112.

[0064] In some embodiments of the present application, the orthographic projection of the second light-emitting element 132 on the first substrate 111 is located within the non-wire routing area 1111; that is, the area of the non-wire routing area 1111 is larger than the size of the second light-emitting element 132 to ensure that sufficient light can be emitted from the non-wire routing area 1111 for the second light-emitting element 132.

[0065] It should be noted that, as shown in Figure 9 the second substrate 131 can also be designed with the wire routing area 1110 and the non-wire routing area 1111 structure, and of course, other structures can also be used, which can be specifically designed according to different embodiments.

[0066] In some embodiments of the present application, as shown in Figure 1 or Figure 2 the first light-emitting component 110 further includes a first reinforcement member 113. The first reinforcement member 113 is disposed on the first substrate 111 and surrounds the first light-emitting element 112. The first reinforcement member 113 can be used to reinforce the first light-emitting element 112, prevent the first light-emitting element 112 from skewing, and ensure the light-emitting angle of the first light-emitting element 112.

[0067] Among them, the first reinforcement member 113 can be made of a transparent material, such as epoxy resin and other materials. When the first light-emitting element 112 is fixed on the first substrate 111, a layer of the first reinforcement member 113 is coated at the position of the first light-emitting element 112, and the first reinforcement member 113 surrounds the first light-emitting element 112 to fix the first light-emitting element 112.

[0068] In some embodiments of the present application, as shown in Figure 1 or Figure 2 the height of the first reinforcement member 113 is equal to or greater than the height of the first light-emitting element 112. The first reinforcement member 113 can be used to protect the first light-emitting element 112 and also reinforce the first light-emitting element 112.

[0069] In some embodiments of the present application, as shown in Figure 1 or Figure 2As shown, the second light-emitting component 130 further includes a second reinforcing member 133. The second reinforcing member 133 is disposed on the second substrate 131 and surrounds the second light-emitting element 132. The second reinforcing member 133 can be used to reinforce the second light-emitting element 132, prevent the second light-emitting element 132 from skewing, and ensure the light-emitting angle of the second light-emitting element 132.

[0070] Among them, the second reinforcing member 133 can be made of a transparent material, for example, materials such as epoxy resin. When the second light-emitting element 132 is fixed on the second substrate 131, a layer of the second reinforcing member 133 is coated at the position of the second light-emitting element 132, and the second reinforcing member 133 surrounds the second light-emitting element 132.

[0071] In some embodiments of the present application, please continue to refer to Figure 1 or Figure 2 As shown, the height of the second reinforcing member 133 is equal to or greater than the height of the second light-emitting element 132. By using the second reinforcing member 133, the second light-emitting element 132 can be protected and reinforced.

[0072] In addition, when the height of the second reinforcing member 133 is equal to or greater than the height of the second light-emitting element 132, it is also beneficial for the anti-peeping layer 120 to be connected to the second light-emitting component 130. By using the surface-to-surface contact between the second reinforcing member 133 and the anti-peeping layer 120, the connection effect between the second reinforcing member 133 and the anti-peeping layer 120 is increased.

[0073] Among them, one side of the anti-peeping layer 120 is adhesively connected to the side of the first substrate 111 close to the second substrate 131, and the other side of the anti-peeping layer 120 is adhesively connected to the side of the second reinforcing member 133 away from the second substrate 131. By using the adhesive connection method, the stability of the anti-peeping layer 120 with the first light-emitting component 110 and the second light-emitting component 130 can be ensured, preventing the anti-peeping layer 120 from sliding between the first light-emitting component 110 and the second light-emitting component 130, and ensuring the display effect. In addition, through the surface-to-surface adhesive connection between the second reinforcing member 133 and the anti-peeping layer 120, the adhesive stability between the two can be further improved.

[0074] OCA (Optically Clear Adhesive) glue is applied on the upper and lower sides of the anti-peeping layer 120, so that the anti-peeping layer 120 is stably connected to the back surface of the first substrate 111 and the surface of the second reinforcing member 133.

[0075] It should be noted that the anti-peeping layer 120 can adopt an anti-peeping film, an anti-peeping coating or other structures.

[0076] For example, a lens structure in the shape of a semi-spherical ball is provided inside the anti-peeping layer 120. The lens protrudes toward the side of the first light-emitting element 112. The lens structures correspond one-to-one with the second light-emitting elements 132. This lens structure can refract the light emitted by the second light-emitting elements 132. Moreover, a refractive material is provided in the anti-peeping layer 120, and the refractive index of the refractive material in the lens structure is greater than that of the refractive material in the anti-peeping layer 120. In this way, when the light passes from the lens structure into the anti-peeping layer 120, its refraction angle is greater than the incident angle, reducing the light emission range, thereby realizing the anti-peeping display mode.

[0077] Of course, other similar structures can also be adopted, such as a triangular pyramid structure, etc., which can be designed according to specific embodiments.

[0078] Among them, the orthographic projection of this lens structure on the second substrate 131 covers this second light-emitting element 132, and adjacent lens structures are connected to each other, so as to ensure that the light emitted by the second light-emitting element 132 can be completely absorbed by the lens structure, and then refraction is realized.

[0079] It is worth mentioning that this backlight module 10 further includes a third light-emitting state. In the third light-emitting state, some of the first light-emitting elements 112 are turned on. Under the range of the turned-on first light-emitting elements 112, the second light-emitting elements 132 are turned off; while the remaining second light-emitting elements 132 are turned on. At this time, the display device can normally view images within the range where the first light-emitting elements 112 are turned on, and cannot normally view images in the environment outside the range where the first light-emitting elements 112 are turned on, thereby realizing unilateral anti-peeping or local anti-peeping.

[0080] For example, according to requirements, control the first light-emitting elements 112 on the left side to be turned on, the first light-emitting elements 112 on the right side to be turned off, control the second light-emitting elements 132 on the left side to be turned off, and control the second light-emitting elements 132 on the right side to be turned on. At this time, the left side of the display device is in the normal display mode, and the right side is in the anti-peeping display mode, realizing unilateral anti-peeping. Correspondingly, it can also be realized that the right side is in the normal display mode and the left side is in the anti-peeping display mode. Different display modes such as the upper side being in the normal display mode and the lower side being in the anti-peeping display mode can also be realized. Of course, it can also be that both the left and right sides are in the anti-peeping display mode, and the middle is in the normal display mode. Please refer to Figure 10 as shown.

[0081] In some embodiments, by controlling the second light-emitting elements 132 in a certain area to be turned on and the first light-emitting elements 112 to be turned off, while the first light-emitting elements 112 except for this area are all turned on and the second light-emitting elements 132 are all turned off. That is to say, only the display device at the position where the second light-emitting elements 132 are turned on is in the anti-peeping display mode, and the display devices in the remaining areas are in the normal display mode.

[0082] In addition, this backlight module 10 further includes a fourth light-emitting state. In the fourth light-emitting state, both the first light-emitting element 112 and the second light-emitting element 132 are turned on, so that the brightness of the entire backlight module 10 is increased, thereby improving the display brightness of the display device.

[0083] In some embodiments of the present application, this backlight module 10 may also include a plurality of light-emitting components stacked. For example, the backlight module 10 includes three light-emitting components, and the three light-emitting components are sequentially stacked in the depth direction of the accommodating cavity. The light-emitting elements thereon are arranged in a staggered manner, and there is no overlap in the vertical direction.

[0084] It should be noted that in order to ensure the anti-peeping effect, the orthographic projection of this anti-peeping layer 120 on the second substrate 131 overlaps with the second substrate 131, that is, the areas of the second substrate 131 and the anti-peeping layer 120 are equal. Of course, it is also possible that the area of the anti-peeping layer 120 is larger than the area of the second substrate 131, so that the light emitted by the second light-emitting element 132 can be completely absorbed by the anti-peeping layer 120.

[0085] In addition, the area of the first substrate 111 is the same as that of the second substrate 131, which can evenly arrange the first light-emitting element 112 and the second light-emitting element 132, and the same number of light-emitting elements can also be arranged on the first substrate 111 and the second substrate 131 to ensure the same light emission amount.

[0086] The present application realizes the normal display mode, the anti-peeping display mode, and the partial anti-peeping display mode by controlling the on and off of the first light-emitting element 112 and the second light-emitting element 132. The switching between the normal display mode and the anti-peeping display mode is simpler and more convenient, and partial anti-peeping can also be realized according to the user's needs.

[0087] Embodiment 2

[0088] The difference between the second embodiment and the first embodiment of the present application is that the anti-peeping layer 120 is removed, and only the first light-emitting component 110 and the second light-emitting component 130 are used to realize the normal display mode and the anti-peeping display mode. Please refer to Figure 11 as shown. At this time, the first substrate 111 of the first light-emitting component 110 is in contact with the second reinforcing member 133 of the second light-emitting component 130, and the light emitted by the second light-emitting element 132 is blocked by the first light-emitting element 112 of the first light-emitting component 110, so that the light angle of the light emitted by the second light-emitting element 132 is smaller than the light angle of the light emitted by the first light-emitting element 112, thereby realizing the normal display mode and the anti-peeping display mode.

[0089] Embodiment 3

[0090] Please refer to Figure 12As shown in the figure, Embodiment 3 of the present application provides a display device, which includes a display panel 20 and the backlight module 10 in Embodiment 1 or Embodiment 2. The display panel 20 is disposed on the light-emitting side of the backlight module 10. When the backlight module 10 is in the first light-emitting state, the display device is in the normal display mode. When the backlight module 10 is in the second light-emitting state, the display device is in the anti-peeping mode. By switching the light-emitting state in the backlight module 10, the switching between the normal display mode and the anti-peeping mode of the display device is realized.

[0091] In addition, when the backlight module 10 is controlled to be in the third light-emitting state, the display device can also achieve the local anti-peeping or unilateral anti-peeping mode.

[0092] This display device can be an electronic product such as a mobile phone, a computer, a liquid crystal TV, etc.

[0093] In the description of this specification, the description with reference to terms such as "some embodiments" and "exemplarily" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0094] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be construed as limiting the present application. Those of ordinary skill in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present application. Therefore, any changes or modifications made in accordance with the claims and the description of the present application shall fall within the scope covered by the patent of the present application.

Claims

1. A backlight module, the backlight module includes a backplane, the backplane is provided with a receiving cavity, characterized in that, The backlight module further includes: a light-emitting component, which is disposed in the accommodating cavity. The light-emitting component includes a first light-emitting part and a second light-emitting part. The second light-emitting part is connected to the bottom wall of the accommodating cavity. The first light-emitting part includes a first substrate and a first light-emitting element disposed on the first substrate. The second light-emitting part includes a second substrate and a second light-emitting element disposed on the second substrate. The orthographic projection of the first light-emitting element on the second substrate does not overlap with the second light-emitting element; wherein, the backlight module has a first light-emitting state and a second light-emitting state. In the first light-emitting state, the first light-emitting element emits light and the second light-emitting element does not emit light. In the second light-emitting state, the first light-emitting element does not emit light and at least part of the second light-emitting elements emit light. The first light-emitting element and the second light-emitting element adopt the same type of light source. The first substrate includes a wiring area and a plurality of non-wiring areas arranged in an array. The wiring area surrounds the non-wiring areas; the second light-emitting element corresponds to the non-wiring area. The orthographic projection of the second light-emitting element on the first substrate is located in the non-wiring area. The light emitted by the second light-emitting element can be blocked by the first light-emitting element, so that the light angle of the second light-emitting element is smaller than the light angle of the first light-emitting element, so as to realize a normal display mode and an anti-peeping display mode.

2. The backlight module according to claim 1, wherein The first light-emitting part further includes a first reinforcing member, which is disposed on the first substrate and surrounds the first light-emitting element.

3. The backlight module according to claim 2, wherein The height of the first reinforcing member is equal to or greater than the height of the first light-emitting element.

4. The backlight module according to claim 2, wherein The second light-emitting part further includes a second reinforcing member, which is disposed on the second substrate and surrounds the second light-emitting element.

5. The backlight module according to claim 4, wherein The height of the second reinforcing member is equal to or greater than the height of the second light-emitting element.

6. The backlight module according to claim 5, wherein The area of the first substrate is the same as the area of the second substrate.

7. A display device, characterized in that, a display panel and the backlight module according to any one of claims 1 to 6, wherein the display panel is disposed on the light-emitting side of the backlight module; when the backlight module is in the first light-emitting state, the display device is in a normal display mode. When the backlight module is in the second light-emitting state, the display device is in an anti-peeping display mode.

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