Double-sided display module and double-sided display device

Abstract

The application relates to a double-sided display module and a double-sided display device. The double-sided display module comprises a first display panel and a second display panel with opposite light emission directions, and a backlight module. The backlight module comprises a lamp plate and a directional reflection film. The lamp plate comprises a circuit board, first lamp beads and second lamp beads. The first lamp beads emit light towards the first display panel, and the second lamp beads reciprocate between the first display panel and the second display panel. The directional reflection film is arranged on the backlight side of the first display panel and comprises a plurality of reflection parts corresponding to the second lamp beads. Part of the light emitted by the first lamp beads is reflected by the reflection parts to the second lamp beads. When the second lamp beads are in an excited state after absorbing the light, the second lamp beads move towards the second display panel and emit light towards the second display panel. Compared with the prior art technical solution of setting a double-layer backlight structure or a double-layer self-luminous organic electroluminescent display panel, the application simplifies the structure of the backlight module and avoids the problem of high box thickness.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display, in particular to a double-sided display module and a double-sided display device. BACKGROUND

[0002] With the progress of liquid crystal display technology, double-sided display is gradually widely used in life. In the prior art, the front and back double-screen display of a liquid crystal display (LCD) is usually realized by setting a double-layer backlight structure or a double-layer self-luminous organic light-emitting diode (OLED) display panel.

[0003] However, the technical solutions of setting a double-layer backlight structure or a double-layer self-luminous OLED display panel have the problems of high cell thickness and poor aesthetics. SUMMARY

[0004] The present application aims to provide a double-sided display module and a double-sided display device to solve the problem of high cell thickness caused by the double-layer backlight structure and the double-layer self-luminous OLED display structure in the prior art.

[0005] In a first aspect, the embodiments of the present application provide a double-sided display module, comprising a first display panel and a second display panel with opposite light emission directions, and a backlight module located between the first display panel and the second display panel, the backlight module comprising: a lamp panel comprising a circuit board and first lamp beads and second lamp beads electrically connected to the circuit board, the first lamp beads and the second lamp beads being continuously distributed along a first direction and being spaced apart along a second direction, the first lamp beads emitting light rays towards the first display panel, the second lamp beads reciprocating between the first display panel and the second display panel, and the second direction intersecting the first direction; and a directional reflection film arranged on the backlight side of the first display panel, the directional reflection film comprising a plurality of reflection portions, the reflection portions being arranged correspondingly to the second lamp beads.

[0006] Part of the light rays emitted by the first lamp beads are reflected back to the second lamp beads by the reflection portions, and when the second lamp beads absorb the light rays reflected back from the reflection portions and are in an excited state, the second lamp beads move towards the second display panel and emit light rays towards the second display panel.

[0007] In a possible implementation, the lamp panel further comprises a sliding rail penetrating through the circuit board, electromagnets located on both sides of the length direction of the sliding rail, and magnetic sliders slidably connected to the sliding rail, the second lamp beads are connected to the magnetic sliders, the electromagnets are electrically connected to the circuit board, and when any one of the two electromagnets is electrified, the second lamp beads are driven to reciprocate between the first display panel and the second display panel by the electromagnetic force between the magnetic slider and the adjacent electromagnet.

[0008] In a possible implementation, when the electromagnet is powered on, the electromagnetic force between the magnetic slider and the adjacent electromagnet is repulsive force or magnetic attraction.

[0009] In a possible implementation, the light-emitting layer of the second lamp bead comprises light-emitting powder formed by long-afterglow self-luminescent excitation material, rubber, resin and additives.

[0010] The long-afterglow self-luminescent excitation material comprises a material matrix and an activator, the material matrix comprises one or more of Y2O2S, SrAl2O4, CaAl2O4, Y2O3, CaTiO3 and Sr2MgSi2O7, and the activator comprises one or more of Dy 3+ , Nd 3+ , Tb 3+ , Ti 4+ , Eu 2+ , Tm 3 + , Eu 3+ , Mg 2+ , Si 4+ , Pr 3+ The long-afterglow self-luminescent excitation material is an aluminate system, and the afterglow time is 1500 minutes or more.

[0011] In a possible implementation, the first display panel comprises a first array substrate and a first color film substrate arranged oppositely, the directional reflection film is arranged on a side of the first array substrate away from the first color film substrate, the first color film substrate comprises a plurality of first color resistance units and a first shading unit located between adjacent first color resistance units, and the first shading unit, the reflection part and the second lamp bead are in the orthographic projection on the circuit board.

[0012] In a possible implementation, the directional reflection film further comprises a uniform diffusion film located between adjacent reflection parts, the first color resistance unit and the uniform diffusion film are in the orthographic projection on the circuit board and cover the first lamp bead.

[0013] In a possible implementation, the second display panel comprises a second array substrate and a second color film substrate arranged oppositely, the second color film substrate comprises a plurality of second color resistance units and a second shading unit located between adjacent second color resistance units, and the second shading unit and the first lamp bead are in the orthographic projection on the circuit board.

[0014] In a possible implementation, a brightness enhancement film is further arranged between the lamp panel and the second array substrate.

[0015] In a possible implementation, the backlight module further comprises a side-in type light bar and a light guide plate, the light guide plate is located between the lamp panel and the brightness enhancement film, and the side-in type light bar is located on the light-incident side of the light guide plate.

[0016] In a second aspect, the embodiments of the present application provide a double-sided display device, comprising:

[0017] The double-sided display module of the first aspect.

[0018] The double-sided display module and the double-sided display device provided by the embodiments of the present application simplify the structure of the backlight module, avoid the problem of high thickness, and beautify the appearance. BRIEF DESCRIPTION OF DRAWINGS

[0019] The features, advantages, and technical effects of the exemplary embodiments of the present application will be described below with reference to the accompanying drawings. In the drawings, the same components are denoted by the same reference numerals. The drawings are not drawn according to the actual proportions, but are used only to show the relative positional relationship, and the layer thickness of some parts is exaggerated in the drawing for the purpose of understanding. The layer thickness in the drawings does not represent the actual proportion of the layer thickness.

[0020] Figure 1 A structure schematic diagram of the double-sided display module provided by the first embodiment of the present application is shown, in which the second lamp bead is in the ground state.

[0021] Figure 2 A structure schematic diagram of the double-sided display module provided by the first embodiment of the present application is shown, in which the second lamp bead is in the ground state. Figure 1 A partial enlarged structure schematic diagram of the region M is shown.

[0022] Figure 3 A structure schematic diagram of the double-sided display module provided by the first embodiment of the present application is shown, in which the second lamp bead is in the ground state.

[0023] Figure 4 A structure schematic diagram of the double-sided display module provided by the first embodiment of the present application is shown, in which the second lamp bead is in the ground state. Figure 3 A partial enlarged structure schematic diagram of the region M is shown.

[0024] Figure 5 A structure schematic diagram of the double-sided display module provided by the first embodiment of the present application is shown, in which the second lamp bead is in the ground state.

[0025] Figure 6 A structure schematic diagram of the double-sided display module provided by the first embodiment of the present application is shown, in which the second lamp bead is in the ground state.

[0026] Figure 7 A structure schematic diagram of the double-sided display module provided by the first embodiment of the present application is shown, in which the second lamp bead is in the ground state.

[0027] Figure 8 A structure schematic diagram of the double-sided display module provided by the second embodiment of the present application is shown, in which the second lamp bead is in the ground state.

[0028] Figure 9 Fig. 2 shows a structure schematic diagram of the double-sided display module provided by the second embodiment of the present application, in which the second lamp bead is in an excited state;

[0029] Figure 10 Fig. 3 shows a structure schematic diagram of the double-sided display device provided by the third embodiment of the present application.

[0030] Legend of reference signs:

[0031] 100, double-sided display module; 200, double-sided display device;

[0032] 1, first display panel; 2, second display panel; 3, backlight module; 4, cover plate

[0033] 11, first array substrate; 12, first color film substrate; 13, first liquid crystal layer;

[0034] 121, first color resistance unit; 122, first light shielding unit;

[0035] 21, second array substrate; 22, second color film substrate; 23, second liquid crystal layer;

[0036] 221, second color resistance unit; 222, second light shielding unit;

[0037] 31, lamp plate; 32, directional reflection film; 33, brightness enhancement film; 34, side-in type light bar; 35, light guide plate;

[0038] 311, circuit board; 312, first lamp bead; 313, second lamp bead; 314, slide rail; 315, electromagnet; 316, magnetic slide block;

[0039] 321, reflection part; 322, uniform diffusion film;

[0040] X, first direction; Y, second direction. DETAILED DESCRIPTION

[0041] Features and exemplary embodiments of various aspects of the present application will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, it will be apparent to one of ordinary skill in the art that the present application can be practiced without some of these specific details. The description of the embodiments is merely intended to provide a better understanding of the present application by showing examples of the present application. In the drawings and the following description, well-known structures and techniques have not been shown in order to avoid unnecessary obscuring of the present application; and, for clarity, the dimensions of regions can be exaggerated. Furthermore, features, structures or characteristics described below can be combined in any suitable manner in one or more embodiments.

[0042] Figure 1 This is a schematic diagram showing the structure of the second LED bead in the ground state in the double-sided display module 100 provided in Embodiment 1 of this application; Figure 2 Show Figure 1 A magnified schematic diagram of the local structure of region M in the middle; Figure 3 This is a schematic diagram showing the structure of the second LED bead in the excited state in the double-sided display module 100 provided in Embodiment 1 of this application; Figure 4 Show Figure 3 A magnified schematic diagram of the local structure of region M in the middle; Figure 5 This diagram shows a schematic of the second LED bead in the ground state of the lamp panel provided in Embodiment 1 of this application; Figure 6 This shows a schematic diagram of the structure of the lamp board in the excited state provided in Embodiment 1 of this application; Figure 7 This diagram illustrates another structural schematic of the double-sided display module 100 provided in Embodiment 1 of this application, where the second LED bead is in its ground state.

[0043] See Figure 1 , Figure 3 , Figure 5 and Figure 6 This application provides a double-sided display module 100, including: a first display panel 1, a second display panel 2 and a backlight module 3, wherein the first display panel 1 and the second display panel 2 emit light in opposite directions, and the backlight module 3 is located between the first display panel 1 and the second display panel 2.

[0044] Specifically, the backlight module 3 includes a lamp board 31 and a directional reflective film 32. The lamp board 31 includes a circuit board 311 and a first LED 312 and a second LED 313 electrically connected to the circuit board 311. The first LED 312 and the second LED 313 are continuously distributed along a first direction X and spaced apart along a second direction Y. The first LED 312 emits light towards the first display panel 1, and the second LED 313 reciprocates between the first display panel 1 and the second display panel 2. Wherein, as... Figure 5 and Figure 6 As shown, the first direction X and the second direction Y intersect. The directional reflective film 32 is disposed on the backlight side of the first display panel 1. The directional reflective film 32 includes a plurality of reflective parts 321, and the reflective parts 321 are correspondingly disposed with the second lamp beads 313.

[0045] A portion of the light emitted by the first LED 312 is sent to the first display panel 1, while the other portion is reflected back to the second LED 313 by the reflector 321. When the second LED 313 is not in an excited state, it remains in a... Figure 1 The second LED 313 absorbs energy at a specific position, meaning it continues to absorb the light emitted by the first LED 312. Once the second LED 313 is in an excited state, it moves towards the second display panel 2, moving to... Figure 3The second light beads 313 emit light rays toward the second display panel 2.

[0046] When the second light beads 313, which emit light rays toward the second display panel 2 and release energy, return to the ground state, the second light beads 313 move toward the first panel and continue to absorb light rays until they move toward the second display panel 2 again, emit light rays, and repeat the above process.

[0047] In the embodiment, the state of the second light beads 313 can be determined by setting a predetermined time, and the position of the second light beads 313 can be controlled. For example, the time required for the second light beads 313 to reach the excited state from the ground state can be obtained by measuring the energy required for the second light beads 313 to reach the excited state from the ground state and according to the efficiency of the second light beads 313 in absorbing the light rays emitted by the first light beads 312.

[0048] In the embodiment, different second light beads 313 can be in different states, and the second light beads 313 can be in different positions. For example, part of the second light beads 313 are in the ground state and absorb energy on the side of the first light beads 312; part of the second light beads 313 are in the excited state and emit light rays toward the second panel. When the second light beads 313 in the excited state return to the ground state, the second light beads 313 in the ground state absorb energy and are in the excited state. The two parts of the second light beads 313 alternate with each other, so that the second display panel 2 can emit light at any time and the working time of the second display panel is prolonged.

[0049] The first light beads 312 can be mini light emitting diodes (Mini-Light Emitting Diode), micro light emitting diodes (Micro-Light Emitting Diode), or organic light emitting diodes (Organic Light-Emitting Diode), so that the first light beads 312 have the advantages of low power and high efficiency.

[0050] In the embodiment, the second light beads 313 and the directional reflection film 32 are arranged alternately with the first light beads 312. The second light beads 313 absorb the light rays emitted by the first light beads 312 and reflected by the directional reflection film 32, change the state of the second light beads 313, and the second light beads 313 move between the first display panel 1 and the second display panel 2 according to their own state, so that the second display panel 2 is in the working state. Compared with the prior art, the structure of the double-sided display module 100 is simplified, the thickness of the box is reduced, and the aesthetic appearance is improved.

[0051] As Figure 2 , Figure 4As shown, the lamp panel 31 further comprises a slide rail 314 penetrating the circuit board 311, electromagnets 315 located at both sides of the length direction of the slide rail 314, and magnetic sliders 316 slidably connected with the slide rail 314. The second lamp beads 313 are connected with the magnetic sliders 316, and the electromagnets 315 are electrically connected with the circuit board 311. When any one of the two electromagnets 315 is electrified, the second lamp beads 313 are driven to reciprocate between the first display panel 1 and the second display panel 2 by the electromagnetic force between the magnetic slider 316 and the adjacent electromagnet 315.

[0052] Specifically, Figure 2 As shown Figure 1 A partial enlarged structural schematic view of the middle region M, Figure 4 As shown Figure 3 A partial enlarged structural schematic view of the middle region M, Figure 1 In the ground state, the second lamp beads are located at the position Figure 3 In the excited state, the second lamp beads are located at the position Figure 4 In the ground state, the second lamp beads are located at the position

[0053] When the electromagnets 315 are electrified, the electromagnetic force between the magnetic sliders 316 and the adjacent electromagnets 315 is repulsive force or magnetic attraction.

[0054] For example, for the case that the polarities of the magnetic sliders 316 and the electromagnets 315 are the same, the magnetic sliders 316 connected with the second lamp beads 313 are located at the side of the first display panel 1. After the electromagnets 315 located at the side of the first display panel 1 are electrified, the electromagnets 315 at this side show magnetism, repulsive force is generated between the electromagnets 315 and the magnetic sliders 316, the sliders and the second lamp beads 313 connected with the sliders are pushed to move from the first display panel 1 to the second display panel 2 through the slide rail 314; similarly, the second lamp beads 313 can move from the second display panel 2 to the first display panel 1 through the slide rail 314. For the case that the polarities of the magnetic sliders 316 and the electromagnets 315 are different, the magnetic sliders 316 connected with the second lamp beads 313 are located at the side of the first display panel 1. After the electromagnets 315 located at the side of the second display panel 2 are electrified, the electromagnets 315 at this side show magnetism, attractive force is generated between the electromagnets 315 and the magnetic sliders 316, the sliders and the second lamp beads 313 connected with the sliders are attracted to move from the first display panel 1 to the second display panel 2 through the slide rail 314; similarly, the second lamp beads 313 can move from the second display panel 2 to the first display panel 1 through the slide rail 314.

[0055] The light-emitting layer of the second lamp bead 313 comprises light-emitting powder formed by long-afterglow self-luminescent excitation material, rubber, resin and auxiliary agent. The long-afterglow self-luminescent excitation material can absorb light energy, jump from a ground state to an excited state, and release light energy when in the excited state to emit light. The long-afterglow light-emitting layer has good weather resistance and high light transmittance. The long-afterglow self-luminescent excitation material in the embodiment is an aluminate system, and the afterglow time is more than 1500 minutes.

[0056] The long-afterglow photoluminescent material is a mixture of one or more of rare earth ion luminescence and rare earth luminescent material and doped material, which can display a mixture of two to three long-afterglow materials. The combination thereof can be a mixture of red, green and blue to form white light, or a combination of any two or three long-afterglow materials to form white light.

[0057] Specifically, the long-afterglow self-luminescent excitation material comprises a material matrix and an activator. The material matrix comprises one or more of Y2O2S, SrAl2O4, CaAl2O4, Y2O3, CaTiO3 and Sr2MgSi2O7. The activator comprises one or more of Dy 3+ , Nd 3+ , Tb 3+ , Ti 4+ , Eu 2+ , Tm 3+ , Eu 3+ , Mg 2+ , Si 4+ , Pr 3+ .

[0058] In some embodiments, the first display panel 1 comprises a first array substrate 11 and a first color film substrate 12 arranged oppositely, and a first liquid crystal layer 13 between the first array substrate 11 and the first color film substrate 12. The directional reflection film 32 is arranged on a side of the first array substrate 11 away from the first color film substrate 12. The first color film substrate 12 comprises a plurality of first color resistance units 121 and a first shading unit 122 between adjacent first color resistance units 121. The first shading unit 122, the reflection part 321 and the second lamp bead 313 are in the same orthographic projection on the circuit board 311.

[0059] Specifically, the first lamp bead 312 emits white light, and the first color resistance unit 121 comprises a red color resistance unit, a green color resistance unit and a blue color resistance unit. The first shading unit 122 absorbs light and does not transmit light. The reflection part 321 reflects the light emitted by the first lamp bead 312 to the first shading unit 122 to the second lamp bead 313, so that the second lamp bead 313 absorbs the light, which is reused to avoid energy waste.

[0060] Generally, the first light shielding unit 122 occupies 30% to 35% of the area of the first color film substrate 12, and 5% of the light emitted by the first lamp bead 312 will be diffusely reflected on the first display panel 1. This part of light can be absorbed and utilized by the second lamp bead 313. Therefore, the second lamp bead 313 can absorb 35% to 40% of the light energy absorbed by the first lamp bead 312, and does not affect the operation of the first display panel 1, ensuring the utilization rate of light and avoiding energy waste.

[0061] It is worth noting that if the first lamp bead 312 contains red, green and blue light chips and can control the red, green and blue light chips to emit red, green and blue light respectively, as shown in Figure 7 , the first display panel 1 can be omitted and replaced by a transparent cover plate 4, thereby reducing the cost.

[0062] In some embodiments, the directional reflection film 32 further comprises a uniform diffusion film 322 located between adjacent reflection portions 321, and the first color resistance unit 121 and the uniform diffusion film 322 have a coincident orthographic projection on the circuit board 311 and cover the first lamp bead 312.

[0063] The uniform diffusion film 322 uniformly transmits the light emitted by the first lamp bead 312 to the first display panel 1, and the first color resistance unit 121 and the uniform diffusion film 322 have a coincident orthographic projection on the circuit board 311 and cover the first lamp bead 312, so that the light emitted by the first lamp bead 312 is uniformly transmitted to the first color resistance unit 121 through the uniform diffusion film 322, ensuring a high energy utilization rate and avoiding energy waste, thereby reducing the energy consumption of the double-sided display module 100.

[0064] In some embodiments, the second display panel 2 comprises a second array substrate 21 and a second color film substrate 22 arranged oppositely, and a second liquid crystal layer 23 located between the second array substrate 21 and the second color film substrate 22. The second color film substrate 22 comprises a plurality of second color resistance units 221 and a second light shielding unit 222 located between adjacent second color resistance units 221, and the second light shielding unit 222 and the first lamp bead 312 have a coincident orthographic projection on the circuit board 311.

[0065] The center distance between the two first lamp beads 312 is 0.3 to 0.5 mm, and the center distance between the two second lamp beads 313 is also 0.3 to 0.5 mm. Due to the position difference between the first lamp bead 312 and the second lamp bead 313, in order to ensure the display quality and facilitate the propagation of the light source center, the pixels of the first display panel 1 and the second display panel 2 are spaced apart by 50 microns in the light emitting surface.

[0066] In some embodiments, the light plate 31 and the second array substrate 21 are further provided with a brightness enhancement film 33, the brightness enhancement film 33 is a rhombic structure, and the second display panel 2 can improve the brightness by about 30%, and the improved brightness is 45%-52% of the first display panel 1, and the second display panel 2 is used for display at night. The brightness enhancement film 33 can be directly attached to the light entrance side of the second array substrate 21, without introducing a new transparent substrate or preparing an optical film, so as to reduce the overall thickness of the double-sided display module 100.

[0067] Figure 5 A structure schematic diagram of the second lamp bead in the light plate provided by the embodiment one of the application is shown in the figure; Figure 6 A structure schematic diagram of the second lamp bead in the light plate provided by the embodiment one of the application is shown in the figure;

[0068] As shown in the figure, Figure 5 the second lamp bead 313 is on the same side of the first lamp bead 312, absorbs the light of the first lamp bead 312, and jumps from the ground state to the excited state, Figure 6 the second lamp bead 313 is on the opposite side of the first lamp bead 312, and emits light.

[0069] The second lamp bead 313 can absorb the light of the first lamp bead 312 and move on both sides to provide a light source for the second display panel 2. Compared with the prior art of setting a double-layer backlight structure or a double-layer self-luminous OLED display panel, the application simplifies the structure of the backlight module 3, avoids the problem of high box thickness, improves the aesthetic appearance, reduces power consumption, and saves energy.

[0070] Second embodiment

[0071] Figure 8 A structure schematic diagram of the second lamp bead in the double-sided display module 100 provided by the embodiment two of the application is shown in the figure; Figure 9 A structure schematic diagram of the second lamp bead in the double-sided display module 100 provided by the embodiment two of the application is shown in the figure.

[0072] As shown in the figure, Figure 8 and Figure 9 the embodiment two of the application provides a double-sided display module 100, the structure of the double-sided display module 100 is basically the same as that of the embodiment one, and the difference is that the backlight module 3 further comprises a side-in type light bar 34 and a light guide plate 35, the light guide plate 35 is located between the light plate 31 and the brightness enhancement film 33, and the side-in type light bar 34 is located on the light entrance side of the light guide plate 35.

[0073] In this embodiment, the light guide plate 35 can fully reflect the light of the side-in type light bar, so that the light is distributed in the entire area of the light guide plate 35, and the light is emitted to the second display panel 2, together with the second lamp bead 313, to provide a light source for the second display panel 2.

[0074] Specifically, the second lamp bead 313 absorbs the light of the first lamp bead 312 on the side of the first display panel 1, moves to the side of the second display panel 2 in the excited state and emits light, and the light emitted by the second lamp bead 313 and the light emitted by the side-standing lamp strip together provide light source for the second display panel 2.

[0075] In the embodiment, the side-in lamp strip 34 and the light guide plate 35 can make the backlight intensity of the second display panel 2 equal to the backlight intensity of the first display panel 1, enrich the use environment of the second display panel 2, and in the case of equal brightness, increase the side-in lamp strip 34 and the light guide plate 35 to reduce the power consumption required by the double-sided display module 100.

[0076] Third Embodiment

[0077] Figure 10 A structure schematic diagram of a double-sided display device 200 provided by Embodiment Three of the present application is shown. As shown in the figure, Figure 10 Embodiment Three of the present application provides a double-sided display device 200, which comprises the double-sided display module 100 as mentioned above.

[0078] It can be understood that the technical solutions of the array substrate provided by the embodiments of the present application can be widely used in various liquid crystal display panels, such as TN (Twisted Nematic, twisted nematic) display panels, IPS (In-Plane Switching, in-plane switching) display panels, VA (Vertical Alignment, vertical alignment) display panels, and MVA (Multi-Domain Vertical Alignment, multi-domain vertical alignment) display panels.

[0079] It should be readily understood that "on", "above" and "over" in the present application should be interpreted in the broadest manner, such that "on" means not only "directly on", but also includes the meaning of "on" with intermediate features or layers therebetween, and "above" or "over" includes the meaning of "above" or "over" with no intermediate features or layers therebetween (i.e., directly on).

[0080] The term "substrate" as used herein refers to a material on which subsequent layers of material are added. The substrate itself can be patterned. The material added on top of the substrate can be patterned or can remain unpatterned. In addition, the substrate can include a wide range of materials, such as silicon, germanium, gallium arsenide, indium phosphide, etc. Alternatively, the substrate can be made of a non-conductive material, such as glass, plastic, or sapphire wafer, etc.

[0081] As used herein, the term "layer" can refer to a portion of material that includes a region having a thickness. A layer can extend over an entire underlying or overlying structure, or can have a scope less than the scope of the underlying or overlying structures. Further, a layer can be a region of a continuous structure that is uniform or non-uniform in composition, and that has a thickness less than the thickness of the continuous structure. For example, a layer can be between or at any pair of lateral planes between a top surface and a bottom surface of a continuous structure. A layer can extend laterally, vertically, and / or along a tapered surface. A substrate can be a layer, can include one or more layers therein, and / or can have one or more layers thereon, thereabove, and / or therebelow. A layer can include multiple layers. For example, an interconnect layer can include one or more conductor and contact layers (within which contacts, interconnect lines, and / or vias are formed) and one or more dielectric layers.

[0082] Finally, it should be noted that the above-described embodiments are merely intended to illustrate the technical solutions of the present application, but not to limit the same; even though the present application has been described in detail with reference to the above-described embodiments, those skilled in the art should understand that the technical solutions recorded in the above-described embodiments can still be modified, or some or all of the technical features thereof can be replaced equivalently; and these modifications or replacements do not cause the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A double-sided display module, comprising a first display panel and a second display panel with opposite light emission directions, and a backlight module located between the first display panel and the second display panel, characterized in that, The backlight module includes: A light panel includes a circuit board and a first LED and a second LED electrically connected to the circuit board. The first and second LEDs are continuously distributed along a first direction and spaced apart along a second direction. The first LED emits light toward the first display panel, and the second LED reciprocates between the first and second display panels. The second direction intersects the first direction. A directional reflective film is disposed on the backlight side of the first display panel. The directional reflective film includes a plurality of reflective portions, which are disposed corresponding to the second LED beads. In this process, a portion of the light emitted by the first LED is reflected back to the second LED by the reflector. When the second LED absorbs the light reflected back from the reflector and is in an excited state, it moves toward the second display panel and emits light toward the second display panel.

2. The double-sided display module according to claim 1, characterized in that, The lamp panel also includes a slide rail passing through the circuit board, electromagnets located on both sides of the slide rail along its length, and a magnetic slider slidably connected to the slide rail. The second lamp bead is connected to the magnetic slider, and the electromagnets are electrically connected to the circuit board. When either of the two electromagnets is energized, the electromagnetic force between the magnetic slider and the adjacent electromagnet drives the second lamp bead to reciprocate between the first display panel and the second display panel.

3. The double-sided display module according to claim 2, characterized in that, When the electromagnet is energized, the electromagnetic force between the magnetic slider and the adjacent electromagnet is either a repulsive force or a magnetic attraction force.

4. The double-sided display module according to claim 1, characterized in that, The light-emitting layer of the second lamp bead includes luminescent powder formed from a long-afterglow self-luminous excitation material, rubber, resin, and additives; The long-afterglow self-luminescent excitation material comprises a material matrix and an activator. The material matrix includes one or more of Y₂O₂S, SrAl₂O₄, CaAl₂O₄, Y₂O₃, CaTiO₃, and Sr₂MgSi₂O₇. The activator includes Dy 3+ 、Nd 3+ 、Tb 3+ Ti 4+ Eu 2 + Tm 3+ Eu 3+ Mg 2+ Si 4+ Pr 3+ One or more of the following, wherein the long-afterglow self-luminescent excitation material is an aluminate system and the afterglow time is more than 1500 minutes.

5. The double-sided display module according to claim 1, characterized in that, The first display panel includes a first array substrate and a first color filter substrate disposed opposite to each other. The directional reflective film is disposed on the side of the first array substrate away from the first color filter substrate. The first color filter substrate includes a plurality of first color resist units and a first light-shielding unit located between adjacent first color resist units. The first light-shielding unit, the reflective part and the second lamp bead have their orthogonal projections on the circuit board coincide.

6. The double-sided display module according to claim 5, characterized in that, The directional reflective film also includes a uniform diffusion film located between adjacent reflective portions, wherein the first color resist unit and the uniform diffusion film have their orthogonal projections on the circuit board overlapping and covering the first LED bead.

7. The double-sided display module according to claim 1, characterized in that, The second display panel includes a second array substrate and a second color filter substrate disposed opposite to each other. The second color filter substrate includes a plurality of second color resist units and a second light-shielding unit located between adjacent second color resist units. The second light-shielding unit and the first lamp bead have their orthogonal projections on the circuit board coincide.

8. The double-sided display module according to claim 7, characterized in that, A brightness enhancement film is also provided between the lamp panel and the second array substrate.

9. The double-sided display module according to claim 8, characterized in that, The backlight module also includes a side-lit LED strip and a light guide plate. The light guide plate is located between the LED panel and the brightness enhancement film, and the side-lit LED strip is located on the light-incident side of the light guide plate.

10. A double-sided display device, characterized in that, include: The double-sided display module as described in any one of claims 1 to 9.

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