Spliced panel assembly, backlight module and display device

Abstract

The present application relates to a spliced ​​panel assembly, a backlight module and a display device. The spliced ​​panel assembly includes at least two mutually spliced ​​light-emitting panels, each light-emitting panel includes a substrate and a plurality of light sources arranged on the substrate in an array distribution, and a seam is formed between two adjacent light-emitting panels, wherein the spliced ​​panel assembly also includes a first optical element arranged on the side of the light source away from the substrate, the plurality of light sources include a first light source adjacent to the seam, the orthographic projection of the first optical element on the substrate covers the seam and the first light source located on both sides of the seam, and the light emitted by the first light source is emitted at a predetermined viewing angle after passing through the first optical element. The spliced ​​panel assembly can solve the shadow problem at the splicing point while taking into account the anti-peeping effect.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a spliced ​​panel assembly, a backlight module and a display device. Background Art

[0002] With the development of science and technology, large-size display devices are becoming more and more popular and widely used. Large-size display devices such as bank self-service terminals need to have anti-peeping functions to protect personal privacy. However, large-size display devices are generally composed of multiple small-size display screens spliced ​​together, and shadows are easily generated at the splicing points, affecting the display effect. Summary of the invention

[0003] The present application aims to provide a spliced ​​panel assembly, a backlight module and a display device, which can solve the shadow problem at the splicing point while taking into account the anti-peeping function.

[0004] In a first aspect, an embodiment of the present application proposes a spliced ​​panel assembly, comprising at least two light-emitting panels spliced ​​together, each light-emitting panel comprising a substrate and a plurality of light sources arranged in an array on the substrate, a seam being formed between two adjacent light-emitting panels, wherein the spliced ​​panel assembly also comprises a first optical element arranged on a side of the light source facing away from the substrate, the plurality of light sources include a first light source adjacent to the seam, the orthographic projection of the first optical element on the substrate covers the seam and the first light source located on both sides of the seam, and the light emitted by the first light source is emitted at a predetermined viewing angle after passing through the first optical element.

[0005] In a possible embodiment, the first optical element includes two first lenses symmetrically distributed relative to the seam, a second lens covering the two first lenses, and a third lens covering the second lens, the first lens has a first curved surface convex toward the light emitting side, the second lens has a second curved surface convex toward the light emitting side, the third lens has a third curved surface convex toward the light emitting side and has a predetermined viewing angle, and the first light sources of two adjacent light-emitting panels are respectively arranged corresponding to the two first lenses.

[0006] In a possible implementation, the central angle corresponding to the first arcuate surface is greater than the central angle corresponding to the second arcuate surface, and the central angle corresponding to the second arcuate surface is greater than the predetermined viewing angle corresponding to the third arcuate surface.

[0007] In a possible implementation, the third lens further includes a first light-shielding surface and a second light-shielding surface that are arranged opposite to each other, and the third arcuate surface is located between the first light-shielding surface and the second light-shielding surface.

[0008] In a possible implementation manner, the first light-shielding surface and the second light-shielding surface are frosted surfaces; or, the first light-shielding surface and the second light-shielding surface are provided with a black coating.

[0009] In a possible implementation, the spliced panel assembly further includes a second optical element disposed on a side of the light source facing away from the substrate. The second optical element includes a fourth lens and a fifth lens that are alternately arranged in sequence along a direction perpendicular to the splicing seam. The plurality of light sources further includes a second light source and a third light source that are alternately arranged in sequence along a direction perpendicular to the splicing seam. The fourth lens is correspondingly disposed with the second light source, and the fifth lens is correspondingly disposed with the third light source. Wherein, the fourth lens is used for scattering the light emitted by the second light source, and the fifth lens is used for collimating the light emitted by the third light source.

[0010] In a possible implementation, the fourth lens has a fourth arc surface protruding toward the light-emitting side, and the fifth lens is a Fresnel lens.

[0011] In a possible implementation, the spliced panel assembly further includes a circuit board and a first switch and a second switch disposed on the circuit board. The first switch is electrically connected to the second light source, and the second switch is electrically connected to the third light source.

[0012] In a second aspect, an embodiment of the present application further provides a backlight module, including the spliced panel assembly as described above.

[0013] In a third aspect, an embodiment of the present application further provides a display device, including the spliced panel assembly as described above.

[0014] According to the spliced panel assembly, backlight module and display device provided by the embodiments of the present application, it includes at least two light-emitting panels spliced with each other. Each light-emitting panel includes a substrate and a plurality of light sources arranged in an array on the substrate. A splicing seam is formed between two adjacent light-emitting panels. Wherein, the spliced panel assembly further includes a first optical element disposed on a side of the light source facing away from the substrate. The plurality of light sources includes a first light source adjacent to the splicing seam. The orthographic projection of the first optical element on the substrate covers the splicing seam and the first light sources on both sides of the splicing seam, and the light emitted by the first light source exits at a predetermined viewing angle after passing through the first optical element. By disposing the first optical element above the splicing seam, the light emitted by the first light sources on both sides of the splicing seam can be made to exit at a predetermined viewing angle, which can not only solve the shadow problem at the splicing position, but also take into account the anti-peeping function and improve the display effect of the large-size display device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The features, advantages and technical effects of the exemplary embodiments of the present application will be described below with reference to the drawings. In the drawings, the same components are denoted by the same reference numerals. The drawings are not drawn to actual scale and are only used to illustrate the relative positional relationship. The layer thickness of some parts is drawn in an exaggerated manner for easy understanding, and the layer thickness in the drawings does not represent the proportional relationship of the actual layer thickness.

[0016] Figure 1 A schematic structural diagram of a spliced panel assembly provided by the first embodiment of the present application is shown;

[0017] Figure 2 Show Figure 1 A sectional view along the M-M direction;

[0018] Figure 3 Show Figure 1 A schematic structural diagram of the light-emitting panel of the splicing panel assembly in the middle;

[0019] Figure 4 Show Figure 3 A sectional view along the N-N direction;

[0020] Figure 5 A schematic structural diagram of the splicing panel assembly provided by the second embodiment of the present application;

[0021] Figure 6 Show Figure 5 A schematic structural diagram of the light-emitting panel of the splicing panel assembly in the middle;

[0022] Figure 7 A schematic structural diagram of the backlight module provided by the third embodiment of the present application and a liquid crystal display device including the backlight module.

[0023] Explanation of reference numerals:

[0024] 1. Light-emitting panel; 10. Substrate;

[0025] 11. First optical element; 111. First lens; A1. First arc surface; 112. Second lens; A2. Second arc surface; 113. Third lens; A3. Third arc surface; B1. First light-shielding surface; B2. Second light-shielding surface;

[0026] 12. Second optical element; 121. Fourth lens; 122. Fifth lens; A4. Fourth arc surface;

[0027] 13. Light source; 131. First light source; 132. Second light source; 133. Third light source; 14. Backlight plate; 15. Rubber frame;

[0028] 2. Liquid crystal display panel; 21. Array substrate; 22. Color filter substrate; 3. Upper polarizer; 4. Lower polarizer. Detailed implementation manners

[0029] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In the detailed description below, many specific details are proposed to provide a comprehensive understanding of the present application. However, it is obvious to those skilled in the art that the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating examples of the present application. In the accompanying drawings and the following description, at least part of the known structures and technologies are not shown to avoid unnecessary ambiguity in the present application; and, for clarity, the size of the regional structure may be exaggerated. In addition, the features, structures or characteristics described below may be combined in one or more embodiments in any suitable manner.

[0030] Figure 1 A schematic diagram showing the structure of a spliced ​​panel assembly provided in an embodiment of the present application is shown; Figure 2 Show Figure 1 Cross-section along the MM direction.

[0031] like Figure 1 and Figure 2 As shown, an embodiment of the present application provides a spliced ​​panel assembly, including at least two light-emitting panels 1 spliced ​​together, each light-emitting panel 1 including a substrate 10 and a plurality of light sources 13 arranged on the substrate 10 and distributed in an array, and a seam L is formed between two adjacent light-emitting panels 1.

[0032] The spliced ​​panel assembly also includes a first optical element 11 arranged on the side of the light source 13 facing away from the substrate 10. The multiple light sources 13 include a first light source 131 adjacent to the seam L. The orthographic projection of the first optical element 11 on the substrate 10 covers the seam L and the first light sources 131 located on both sides of the seam L, and the light emitted by the first light source 131 passes through the first optical element 11 and is emitted at a predetermined viewing angle.

[0033] The light source 13 can be a conventional-sized light-emitting diode (LED), or can be any one of a micro-LED or a submillimeter light-emitting diode (Mini-LED). Micro-LED refers to an LED chip with a grain size of less than 100 microns, and Mini-LED refers to an LED chip with a grain size of about 100 to 300 microns. LED, Mini-LED or Micro-LED can be used as a self-luminous light-emitting element for display, and has the advantages of low power consumption, high brightness, high resolution, high color saturation, fast response speed, long life, and high efficiency.

[0034] In one example, at least two light-emitting panels 1 are spliced with each other in the horizontal direction. A splicing seam L is formed between two adjacent light-emitting panels 1. A first light source 131 is disposed near the splicing seam L of each light-emitting panel 1. The first light source 131 can be one column or more columns. As Figure 1 shown, three light-emitting panels 1 are spliced with each other in the horizontal direction, forming two splicing seams L in total. One column of first light sources 131 is disposed near the splicing seam L of each light-emitting panel 1.

[0035] For a spliced panel assembly, a splicing seam L is inevitably formed between two adjacent light-emitting panels 1, and there is no light source 13 at the splicing seam, which easily forms a shadow, resulting in the display screen being divided, destroying the continuity and integrity of the image, and affecting the display effect. Therefore, in the embodiment of the present application, a first optical element 11 is added on the side of the light source 13 away from the substrate 10, and the orthographic projection of the first optical element 11 on the substrate 10 covers the splicing seam L and the first light sources 131 on both sides of the splicing seam L, such as two columns or more columns of first light sources 131 on both sides of the splicing seam L, that is, one column or more columns of first light sources 131 near the splicing seam L of each light-emitting panel 1 are covered by the orthographic projection of the first optical element 11 on the substrate 10, so that the light emitted by two columns or more columns of first light sources 131 on both sides of the splicing seam L exits at a predetermined viewing angle after passing through the first optical element 11. The exiting light can illuminate the splicing seam and eliminate the shadow; at the same time, the light at the splicing seam L exits at a predetermined viewing angle, so that people outside the predetermined viewing angle range cannot receive the exiting light, thereby realizing the anti-peeping function.

[0036] According to the spliced panel assembly provided by the embodiment of the present application, it includes at least two light-emitting panels 1 spliced with each other. Each light-emitting panel 1 includes a substrate 10 and a plurality of light sources 13 arranged in an array on the substrate 10. A splicing seam L is formed between two adjacent light-emitting panels 1. Wherein, the spliced panel assembly further includes a first optical element 11 disposed on the side of the light source 13 away from the substrate 10. The plurality of light sources 13 include first light sources 131 adjacent to the splicing seam L. The orthographic projection of the first optical element 11 on the substrate 10 covers the splicing seam L and the first light sources 131 on both sides of the splicing seam L, and the light emitted by the first light source 131 exits at a predetermined viewing angle after passing through the first optical element 11. By disposing the first optical element 11 above the splicing seam L, the light emitted by the first light sources 131 on both sides of the splicing seam L can exit at a predetermined viewing angle, which can not only solve the shadow problem at the splicing part, but also take into account the anti-peeping function and improve the display effect of the large-size display device.

[0037] The following will describe in detail the specific structure of the spliced panel assembly provided by the embodiment of the present application with reference to the drawings.

[0038] As Figure 2As shown in the figure, the first optical element 11 includes two first lenses 111 symmetrically distributed with respect to the seam L, a second lens 112 covering the two first lenses 111, and a third lens 113 covering the second lens 112. The first lens 111 has a first arc surface A1 protruding toward the light-emitting side. The second lens 112 has a second arc surface A2 protruding toward the light-emitting side. The third lens 113 has a third arc surface A3 protruding toward the light-emitting side and having a predetermined viewing angle. The light sources 13 of two adjacent light-emitting panels 1 located on both sides of the seam L are respectively arranged corresponding to the two first lenses 111.

[0039] Specifically, the two first lenses 111, the second lens 112, and the third lens 113 are of an integrally formed structure. The first arc surfaces A1 of the two first lenses 111 symmetrically distributed with respect to the seam L diffuse the light rays emitted by the light sources 13 on both sides of the seam L respectively. The second arc surface A2 of the second lens 112 remixes and diffuses the two diffused light beams again. The third arc surface A3 of the third lens 113 with a predetermined viewing angle further diffuses the light rays and then emits them, playing a role in light collection, so as to better achieve the anti-peeping effect.

[0040] Furthermore, the angle of the central angle corresponding to the first arc surface A1 is greater than the angle of the central angle corresponding to the second arc surface A2, and the angle of the central angle corresponding to the second arc surface A2 is greater than the angle of the predetermined viewing angle corresponding to the third arc surface A3, so that the large-view-angle light rays emitted by the light sources 13 on both sides of the seam L can be gradually collected and emitted at a smaller predetermined viewing angle.

[0041] In one example, the angle of the central angle corresponding to the third arc surface A3 of the third lens 113, that is, the predetermined viewing angle, is 100° ± 10°; the angle of the central angle corresponding to the second arc surface A2 of the second lens 112 is 120° ± 10°, and the angle of the central angle corresponding to the first arc surface A1 of the first lens 111 is 130° ± 10°.

[0042] In some embodiments, the third lens 113 further includes a first light-shielding surface B1 and a second light-shielding surface B2 arranged oppositely, and the third arc surface A3 is located between the first light-shielding surface B1 and the second light-shielding surface B2.

[0043] In order to ensure that the large-view-angle light rays emitted by the light sources 13 on both sides of the seam L are emitted at a predetermined viewing angle after passing through the third lens 113 of the first optical element 11 and will not be emitted in other directions, the third lens 113 further includes the first light-shielding surface B1 and the second light-shielding surface B2 located on both sides of the third arc surface A3, and the first light-shielding surface B1 and the second light-shielding surface B2 are used to prevent the light rays from being emitted.

[0044] Furthermore, in one example, the first light-shielding surface B1 and the second light-shielding surface B2 are frosted surfaces, and the frosted surfaces can prevent the light rays from passing through or only allow weak light rays to pass through.

[0045] In another example, the first light-shielding surface B1 and the second light-shielding surface B2 are provided with a black coating. The black coating can prevent light from passing through and reflect the light reaching the first light-shielding surface B1 and the second light-shielding surface B2 to the third arc surface A3, improving the light transmittance of the third lens 113.

[0046] Figure 3 Show Figure 1 A schematic structural diagram of the light-emitting panel of the splicing panel assembly; Figure 4 Show Figure 3 A cross-sectional view along the N-N direction.

[0047] In some embodiments, the splicing panel assembly further includes a second optical element 12 disposed on a side of the light source 13 away from the substrate 10. The second optical element 12 includes a fourth lens 121 and a fifth lens 122 that are alternately arranged in sequence along a direction perpendicular to the splicing seam L.

[0048] The plurality of light sources 13 further includes a second light source 132 and a third light source 133 that are alternately arranged in sequence along a direction perpendicular to the splicing seam L, that is, in the horizontal direction and the vertical direction, the plurality of second light sources 132 and the plurality of third light sources 133 are alternately arranged in sequence. The fourth lens 121 is correspondingly arranged with the second light source 132, and the fifth lens 122 is correspondingly arranged with the third light source 133. Wherein, the fourth lens 121 is used to scatter the light emitted by the second light source 132, and the fifth lens 122 is used to collimate the light emitted by the third light source 133.

[0049] Take Figure 1 the middle light-emitting panel 1 among the three horizontally spliced light-emitting panels 1 in Figure 3 as an example. As Figure 4 shown, a row of first light sources 131 are respectively arranged on both side edges of the light-emitting panel 1 in the horizontal direction, and a second light source 132 and a third light source 133 that are alternately arranged in sequence along a direction perpendicular to the splicing seam L are also arranged, that is, in the horizontal direction and the vertical direction, the plurality of second light sources 132 and the plurality of third light sources 133 are alternately arranged in sequence. Wherein, the second light source 132 is marked as "A", and the third light source 133 is marked as "B". As

[0050] When multiple second light sources 132 marked as "A" are lit and multiple third light sources 133 marked as "B" are turned off, the light-emitting panel 1 is in a wide-view sharing mode; when multiple second light sources 132 marked as "A" are turned off and multiple third light sources 133 marked as "B" are lit, the light-emitting panel 1 is in a narrow-view anti-peeping mode; when all light sources 13 are lit, the light-emitting panel 1 is in a high-brightness outdoor mode.

[0051] Furthermore, the fourth lens 121 has a fourth arc surface A4 protruding toward the light-emitting side, and the fifth lens 122 is a Fresnel lens. The angle of the central angle corresponding to the fourth arc surface A4 of the fourth lens 121 can be, for example, 130° ± 10°, for scattering the light emitted by the second light source 132. The fifth lens 122 can refract the light emitted by the third light source 133 into a collimated light source.

[0052] Specifically, the fifth lens 122 is a Fresnel lens, also known as a thread lens, generally injection-molded from polyolefin materials into a thin sheet, and can also be made of glass. One side of the lens surface of the Fresnel lens is a smooth surface, and the other side has countless concentric circular patterns (i.e., Fresnel zones), yet it can achieve the effect of a convex lens. Its texture is designed according to the interference and diffraction of light as well as the requirements of relative sensitivity and reception angle. The manufacturing principle of the Fresnel lens is: since the refraction of light only occurs at the interface of the medium, and the lens of the convex lens is relatively thick, the part where the light travels in a straight line in the glass will cause the light to attenuate. In an ordinary convex lens, there will be a phenomenon of darkening and blurring at the edges and corners. If the part where the light travels in a straight line can be removed and only the curved surface where refraction occurs is retained, a large amount of material can be saved while achieving the same light-gathering effect. If the projection light source is a parallel light, the brightness of each part of the image can be kept consistent after converging projection.

[0053] In some embodiments, the spliced panel assembly further includes a circuit board and a first switch and a second switch disposed on the circuit board. The first switch is electrically connected to the second light source 132, and the second switch is electrically connected to the third light source 133. Thus, by separately controlling the opening and closing of the first switch and the second switch, the switching among wide-angle, narrow-angle, and high-brightness modes can be achieved, improving the display flexibility of the spliced panel assembly.

[0054] Second Embodiment

[0055] Figure 5 Shows a schematic structural diagram of a spliced panel assembly provided by the second embodiment of the present application; Figure 6 Shows Figure 5 The schematic structural diagram of the light-emitting panel of the spliced panel assembly in

[0056] As Figure 5 And Figure 6As shown in the figure, the spliced panel assembly provided in the second embodiment of the present application is similar in structure to the spliced panel assembly provided in the first embodiment. The difference is that at least two light-emitting panels 1 are spliced with each other in the horizontal and vertical directions, and a first light source 131 is provided at each light-emitting panel 1 near the splicing seam L.

[0057] Specifically, at least two light-emitting panels 1 are spliced with each other in the horizontal and vertical directions, a splicing seam L is formed between two adjacent light-emitting panels 1, and a first light source 131 is provided at each light-emitting panel 1 near the splicing seam L. The first light source 131 can be one column or more columns. As Figure 5 shown in the figure, six light-emitting panels 1 are spliced with each other in the horizontal and vertical directions, and one column of first light sources 131 is provided at each light-emitting panel 1 near the splicing seam L. The orthographic projection of the first optical element 11 on the substrate 10 covers the splicing seam L and the first light sources 131 on both sides of the splicing seam L, and the light emitted by the first light source 131 exits at a predetermined viewing angle after passing through the first optical element 11.

[0058] Furthermore, the spliced panel assembly further includes a second optical element 12 provided on the side of the light source 13 away from the substrate 10. The second optical element 12 includes a fourth lens 121 and a fifth lens 122 that are alternately arranged in sequence along a direction perpendicular to the splicing seam L. The plurality of light sources 13 further includes a second light source 132 and a third light source 133 that are alternately arranged in sequence along a direction perpendicular to the splicing seam L. The fourth lens 121 is correspondingly arranged with the second light source 132, and the fifth lens 122 is correspondingly arranged with the third light source 133. Among them, the fourth lens 121 is used to scatter the light emitted by the second light source 132, and the fifth lens 122 is used to collimate the light emitted by the third light source 133.

[0059] Taking Figure 5 the light-emitting panel 1 in the middle of the first row among the six light-emitting panels 1 spliced with each other in the horizontal and vertical directions as an example, as Figure 6 shown in the figure, one column of first light sources 131 is respectively provided at the two side edges and the lower edge of the light-emitting panel 1 in the horizontal direction near the splicing seam L, and a second light source 132 and a third light source 133 that are alternately arranged in sequence along a direction perpendicular to the splicing seam L are also provided. Among them, the second light source 132 is marked as "A", and the third light source 133 is marked as "B". As Figure 4 shown in the figure, the fourth lens 121 above the second light source 132 is used to scatter the light emitted by the second light source 132, and the fifth lens 122 above the third light source 133 is used to collimate the light emitted by the third light source 133.

[0060] When multiple second light sources 132 marked as "A" are lit and multiple third light sources 133 marked as "B" are turned off, the light-emitting panel 1 is in a wide-view sharing mode; when multiple second light sources 132 marked as "A" are turned off and multiple third light sources 133 marked as "B" are lit, the light-emitting panel 1 is in a narrow-view anti-peeping mode; when all light sources 13 are lit, the light-emitting panel 1 is in a high-brightness outdoor mode.

[0061] It can be understood that when more light-emitting panels 1 are spliced into more rows and columns, one or more columns of first light sources 131 are also provided near the splicing seam L at the upper edge of the light-emitting panel 1, and a first optical element 11 is provided above the first light sources 131, which can not only solve the shadow problem at the splicing place, but also take into account the anti-peeping function and improve the display effect of the large-size display device.

[0062] Third Embodiment

[0063] Figure 7 The structure diagrams of the backlight module provided by the third embodiment of the present application and the liquid crystal display device including the backlight module are shown.

[0064] As Figure 7 shown, the third embodiment of the present application also provides a backlight module and a display device including the backlight module. The backlight module includes any one of the splicing panel assemblies as described above.

[0065] In this embodiment, the light-emitting panel 1 is a direct-lit backlight module, and the splicing panel assembly is a splicing backlight module, and a liquid crystal display panel (LCD) is provided on one side of the light-emitting surface. The LCD display panel can be an LCD display panel of any size, or a display panel of any size formed by splicing multiple LCD display panels.

[0066] Since the LCD display panel 2 itself does not emit light, it is necessary to set up a backlight module to provide it with sufficient brightness and evenly distributed light sources so that it can display images normally. In order to achieve infinite splicing of large screens or extra-large screens, the backlight module needs to be designed as a spliceable structure. Among them, the substrate 10 is a printed circuit board electrically connected to the light source 13. The first optical element 11 and the second optical element 12 are provided on the side of the light source 13 away from the printed circuit board.

[0067] As Figure 7 shown, the liquid crystal display panel 2 includes an array substrate 21 and a color filter substrate 22 disposed opposite to each other and a liquid crystal layer disposed between the array substrate 21 and the color filter substrate 22. The liquid crystal layer 3 includes a plurality of liquid crystal molecules, and the liquid crystal molecules are usually rod-shaped, which can flow like a liquid and have some crystal characteristics. When the liquid crystal molecules are in an electric field, their alignment directions will change according to the change of the electric field.

[0068] Further, the display device further includes an upper polarizer 3 located on the light-emitting surface side of the liquid crystal display panel 2, and a lower polarizer 4 located on the backlight surface side of the liquid crystal display panel 2. The lower polarizer 4 and the upper polarizer 3 can polarize the incident light of the liquid crystal display panel 2 to allow light vibrating only in one direction to transmit.

[0069] The backlight module 1 further includes a backlight plate 14, the light source 13 is located on the backlight plate 14, the first optical component 11 and the second optical element 12 are located on the side of the light source 13 away from the backlight plate 14, and the orthographic projection of the first optical component 11 on the backlight plate 11 covers the orthographic projections of a plurality of light sources 13 on the backlight plate 14.

[0070] The material of the backlight plate 14 can be a metal material, such as any one of an aluminum plate, an aluminum alloy plate, or a galvanized steel, and is made by processes such as stamping. The metal material has good ductility and can protect the backlight module from being easily broken under the impact of external forces. The material of the backlight plate 14 can also be a plastic material, such as polyimide, polycarbonate, polyethersulfone, polyethylene terephthalate, polyethylene, etc., to reduce the weight of the backlight module and lower the cost of the backlight module. The shape of the backlight plate 14 can be the same as the shape of the liquid crystal display panel 2 using the backlight module. For example, when the shape of the liquid crystal display panel 2 is circular, the shape of the backlight plate 14 of the backlight module used is also circular. The shape of the backlight plate 14 can vary with different embodiments.

[0071] In some embodiments, the backlight module further includes a rubber frame 15, and the rubber frame 15 is disposed around the edge of the backlight plate 14. The rubber frame 15 is usually made of a plastic material, such as polycarbonate, and has good elasticity. During the transportation and use of the backlight module, the rubber frame 15 can provide a good buffering effect for structures such as the light source 13, the first optical component 11, and the second optical element 12, and prevent structures such as the light source 13, the first optical component 11, and the second optical element 12 from directly hitting the backlight plate 14 and being damaged. Optionally, the rubber frame 15 and the backlight plate 14 can be respectively manufactured and then pasted together with a double-sided tape. Optionally, after the backlight plate 14 is stamped, it can also be used as an insert to be integrally injection-molded with the rubber frame 15.

[0072] It can be understood that the technical solutions of the backlight modules provided in the embodiments of the present application can be widely used to provide light sources for various liquid crystal display panels, such as TN (Twisted Nematic) display panels, IPS (In-Plane Switching) display panels, VA (Vertical Alignment) display panels, and MVA (Multi-Domain Vertical Alignment) display panels.

[0073] In some embodiments, the light-emitting panel 1 is an OLED display panel, and the spliced panel assembly is a spliced OLED display device.

[0074] The substrate 10 can be made of a light-transmitting material such as glass or polyimide (PI). The light source 13 can include a red light-emitting element, a green light-emitting element, and a blue light-emitting element. The RGB (red, green, blue) three-color light-emitting elements are formed on the substrate 10 by evaporation to form a light-emitting layer.

[0075] The light source 13 includes a first electrode, a light-emitting structure located on the first electrode, and a second electrode located on the light-emitting structure. Either the first electrode or the second electrode is an anode, and the other is a cathode. The light-emitting structure can also include at least one of a hole injection layer (HIL), a hole transport layer (HTL), an electron injection layer (EIL), or an electron transport layer (ETL).

[0076] In some embodiments, the light-emitting panel 1 is an LED display panel, and the spliced panel assembly is a spliced LED display.

[0077] The substrate 10 can be made of a light-transmitting material such as glass or polyimide (PI). The light source 13 is a micro light-emitting diode or a sub-millimeter light-emitting diode. A micro light-emitting diode (Micro-LED) refers to an LED chip with a grain size of less than 100 micrometers, and a sub-millimeter light-emitting diode (Mini-LED) refers to an LED chip with a grain size of about 100 to 300 micrometers. Mini-LED / Micro-LED can be used as a self-emitting LED display, which has the advantages of low power consumption, high brightness, high resolution, high color saturation, fast response speed, long lifespan, and high efficiency. The light source 13 can include a red light-emitting element, a green light-emitting element, and a blue light-emitting element. The RGB (red, green, blue) three-color light-emitting elements are transferred onto the substrate 10 by transfer technology to form a light-emitting layer.

[0078] It should be easily understood that the terms "on...", "above...", and "over..." in this application should be interpreted in the broadest manner, so that "on..." not only means "directly on something", but also includes the meaning of "on something" with intermediate features or layers therebetween, and "above..." or "over..." not only includes the meaning of "above or over something", but can also include the meaning of "above or over something" with no intermediate features or layers therebetween (i.e., directly on something).

[0079] As used herein, the term "layer" may refer to a portion of a material that includes a region having a certain thickness. The layer may extend over the entire underlying or overlying structure, or may have a smaller extent than the underlying or overlying structure. In addition, the layer may be a region of a homogeneous or heterogeneous continuous structure, the thickness of which is less than the thickness of the continuous structure. For example, the layer may be located between the top and bottom surfaces of the continuous structure or between any pair of lateral planes at the top and bottom surfaces. The layer may extend laterally, vertically, and / or along a tapered surface.

[0080] As used herein, the term "substrate" refers to a material on which subsequent material layers are added. The substrate itself may be patterned. The material added on top of the substrate may be patterned or may remain unpatterned. In addition, the substrate may include a wide range of materials, such as, for example, silicon, germanium, gallium arsenide, indium phosphide, etc. Alternatively, the substrate may be made of a non-conductive material (such as glass, plastic, or sapphire wafer, etc.). The substrate may be a layer, may include one or more layers therein, and / or may have one or more layers located thereon, above it, and / or below it. A layer may include multiple layers. For example, an interconnect layer may include one or more conductors and contact layers (in which contacts, interconnect lines, and / or vias are formed) and one or more dielectric layers.

[0081] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A spliced ​​panel assembly, comprising at least two light-emitting panels spliced ​​together, each of the light-emitting panels comprising a substrate and a plurality of light sources arranged on the substrate in an array, a splicing seam being formed between two adjacent light-emitting panels, It is characterized in that The spliced ​​panel assembly further includes a first optical element disposed on a side of the light source facing away from the substrate, the multiple light sources include a first light source adjacent to the splice, the orthographic projection of the first optical element on the substrate covers the splice and the first light sources located on both sides of the splice, and the light emitted by the first light source is emitted at a predetermined viewing angle after passing through the first optical element; The first optical element includes two first lenses symmetrically distributed relative to the seam, a second lens covering the two first lenses, and a third lens covering the second lens, the first lens has a first curved surface convex toward the light emitting side, the second lens has a second curved surface convex toward the light emitting side, the third lens has a third curved surface convex toward the light emitting side and having the predetermined viewing angle, and the first light sources of the two adjacent light-emitting panels are respectively arranged corresponding to the two first lenses.

2. The spliced ​​panel assembly according to claim 1, It is characterized in that The central angle of the first arcuate surface is greater than the central angle of the second arcuate surface, and the central angle of the second arcuate surface is greater than the predetermined viewing angle of the third arcuate surface.

3. The spliced ​​panel assembly according to claim 1, It is characterized in that The third lens further includes a first light-shielding surface and a second light-shielding surface that are arranged opposite to each other, and the third arc-shaped surface is located between the first light-shielding surface and the second light-shielding surface.

4. The spliced ​​panel assembly according to claim 3, It is characterized in that The first light-shielding surface and the second light-shielding surface are frosted surfaces; or the first light-shielding surface and the second light-shielding surface are provided with a black coating.

5. The spliced ​​panel assembly according to claim 1, It is characterized in that It also includes a second optical element disposed on a side of the light source away from the substrate, the second optical element including a fourth lens and a fifth lens alternately disposed in sequence along a direction perpendicular to the joint; The multiple light sources further include a second light source and a third light source which are sequentially staggered and arranged in a direction perpendicular to the joint, the fourth lens is arranged corresponding to the second light source, and the fifth lens is arranged corresponding to the third light source; The fourth lens is used to scatter the light emitted by the second light source, and the fifth lens is used to collimate the light emitted by the third light source.

6. The spliced ​​panel assembly according to claim 5, It is characterized in that The fourth lens has a fourth arc-shaped surface convex toward the light-emitting side, and the fifth lens is a Fresnel lens.

7. The spliced ​​panel assembly according to claim 5, It is characterized in that It also includes a circuit board and a first switch and a second switch disposed on the circuit board, wherein the first switch is electrically connected to the second light source, and the second switch is electrically connected to the third light source.

8. A backlight module, Characterized in that, Comprising: The spliced panel assembly according to any one of claims 1 to 7.

9. A display device, Characterized in that, Comprising: The spliced panel assembly according to any one of claims 1 to 7.

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