Backlight structure, backlight module and display device

Abstract

The utility model provides a backlight structure, a backlight module and a display device to solve the technical problem that light emitted by a backlight structure in the prior art is prone to causing a halo phenomenon. The backlight structure comprises a bearing substrate, a plurality of light-emitting parts and a lens assembly, the light-emitting parts are arranged on the bearing substrate, the lens assembly is arranged on the bearing substrate and comprises a plurality of Fresnel lenses, and the Fresnel lenses correspond to the light-emitting parts. The Fresnel lens is used for converting at least part of visible light emitted by the light-emitting part into visible light perpendicular to the bearing substrate. In the backlight structure provided by the invention, the Fresnel lens and the light-emitting part are correspondingly arranged, and the Fresnel lens is used for converting at least part of visible light emitted by the light-emitting part into visible light perpendicular to the bearing substrate. The visible light converted by the two adjacent Fresnel lenses cannot be overlapped, so that the phenomenon of halo and the like caused by the overlapping of the visible light emitted by the two adjacent light-emitting parts can be avoided.

Description

Technical Field

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

[0002] A display device emits light through a light-emitting component to display an image. In related technologies, the light-emitting component emits light at an angle of 120 degrees, and the light rays are emitted from the light-emitting component in a pattern of becoming sparser from a dense center. Therefore, to prevent the edge light from being too dim, the light-emitting components are arranged densely, but this causes another problem: the light emitted by adjacent light-emitting components partially overlaps, resulting in a halo phenomenon. Summary of the Utility Model

[0003] The purpose of this application is to provide a backlight structure, a backlight module, and a display device to solve the technical problem that the light emitted by the backlight structure in related technologies easily causes a halo phenomenon.

[0004] In a first aspect, this application provides a backlight structure, including:

[0005] A carrier substrate;

[0006] A plurality of light-emitting components, which are arranged on the carrier substrate; and

[0007] A lens assembly, which is arranged on the carrier substrate, and the lens assembly includes a plurality of Fresnel lenses. The Fresnel lenses are arranged corresponding to the light-emitting components, and the Fresnel lenses are used to convert at least part of the visible light emitted by the light-emitting components into visible light perpendicular to the carrier substrate.

[0008] In the backlight structure provided by this application, the backlight structure includes a carrier substrate, a plurality of light-emitting components are arranged on the carrier substrate, the lens assembly is arranged on the carrier substrate, and the lens assembly includes a plurality of Fresnel lenses. The Fresnel lenses are arranged corresponding to the light-emitting components, and the Fresnel lenses are used to convert at least part of the visible light emitted by the light-emitting components into visible light perpendicular to the carrier substrate. The visible light converted by two adjacent Fresnel lenses does not overlap, thereby avoiding the overlap of the visible light emitted by two adjacent light-emitting components and resulting in phenomena such as halos.

[0009] In some embodiments, the number of the lens assemblies is one, and one lens assembly is arranged corresponding to the plurality of light-emitting components; or, the number of the lens assemblies is multiple, and the multiple lens assemblies are arranged corresponding to the plurality of light-emitting components.

[0010] In some embodiments, the lens assembly includes a first support member, a second support member, and a third support member. The first support member is located between four Fresnel lenses. The second support member is located at the edge of the lens assembly and is disposed adjacent to two Fresnel lenses. The third support member is located at the edge of the lens assembly and is disposed adjacent to one Fresnel lens. Two adjacent lens assemblies can be spliced through the second support member, and four adjacent lens assemblies can be spliced through the third support member.

[0011] In some embodiments, the radial dimension D1 of the Fresnel lens is greater than the radial dimension D2 of the light-emitting member.

[0012] In some embodiments, in the thickness direction of the backlight structure, the distance between the side of the Fresnel lens away from the axis and the light-emitting member is H, and the radial dimension D1 of the Fresnel lens satisfies: D1 ≥ D2 + H * tan30°.

[0013] In some embodiments, the backlight structure further includes a blocking member. The blocking member is disposed on the carrier substrate and encloses to form a receiving space for receiving the lens assembly, and the blocking member is used to limit the lens assembly.

[0014] In some embodiments, in the thickness direction of the backlight structure, the size of the blocking member is smaller than the size of the lens assembly.

[0015] In a second aspect, the present application provides a backlight module, which includes a back plate, a middle frame, and the backlight structure as described above. The backlight structure is disposed on the back plate, the middle frame surrounds the outer periphery of the back plate, and the middle frame is used to set a display panel.

[0016] In some embodiments, the backlight module further includes an optical film layer. The back plate includes a bottom plate and side plates surrounding the bottom plate. The backlight structure is disposed on the bottom plate, the optical film layer is fixed on the side plates, and the optical film layer is disposed on the side of the optical structure away from the bottom plate. The optical film layer is used to homogenize the visible light emitted by the optical structure.

[0017] In a third aspect, the present application provides a display device, which includes a display panel and the backlight module as described above. The display panel is disposed on the middle frame. Description of the Drawings

[0018] To more clearly illustrate the technical solutions of the embodiments of the present application, the accompanying drawings required for use in the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0019] Figure 1 It is a schematic structural diagram of a backlight module provided by an embodiment of the present application;

[0020] Figure 2 It is a schematic structural diagram of a corresponding arrangement of a Fresnel lens and a light-emitting component provided by an embodiment of the present application;

[0021] Figure 3 It is a schematic structural diagram of a lens assembly provided by an embodiment of the present application;

[0022] Figure 4 It is a schematic structural diagram of splicing of multiple lens assemblies provided by an embodiment of the present application;

[0023] Figure 5 It is a schematic structural size diagram of a corresponding arrangement of a Fresnel lens and a light-emitting component provided by an embodiment of the present application;

[0024] Figure 6 It is a schematic structural diagram of a display device provided by an embodiment of the present application.

[0025] Label description:

[0026] Display device - 1, backlight module - 1000, display panel - 2000, backlight structure - 100, carrier substrate - 10, light-emitting component - 20, lens assembly - 30, Fresnel lens - 31, first support - 41, second support - 42, third support - 43, back plate - 50, middle frame - 60, optical film layer - 70. Specific embodiments

[0027] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, rather than all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0028] References herein to "embodiments" or "implementations" mean that the specific features, structures, or characteristics described in connection with the embodiments or implementations can be included in at least one embodiment of the present application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0029] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion.

[0030] In this specification, for convenience, terms indicating orientation or positional relationships such as "middle", "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are used to describe the positional relationships of the components with reference to the drawings. This is only for the convenience of describing this specification and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present disclosure. The positional relationships of the components are appropriately changed according to the directions of the described components. Therefore, it is not limited to the terms described in the specification and can be appropriately replaced according to the circumstances.

[0031] In this specification, unless otherwise clearly specified and defined, the terms "installed", "connected", and "coupled" shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate member, or the communication inside two elements. For those of ordinary skill in the art, the meanings of the above terms in the present disclosure can be understood according to the circumstances.

[0032] The display device emits light through a light-emitting element and then displays an image. In the related art, the light-emitting element emits light at an angle of 120 degrees, and the light rays are emitted from the light-emitting element as the center, becoming sparser from dense. Therefore, in order to prevent the edge light from being too dim, the arrangement of the light-emitting elements is relatively dense, but this causes another problem that the light emitted by adjacent light-emitting elements will partially overlap, resulting in a halo phenomenon.

[0033] Please refer to Figures 1 to 3 , Figure 1 which is a schematic structural diagram of a backlight module provided by an embodiment of the present application, Figure 2 which is a schematic structural diagram of a Fresnel lens and a light-emitting element arranged corresponding to each other provided by an embodiment of the present application, Figure 3It is a schematic structural diagram of a lens assembly provided by an embodiment of the present application. The purpose of the present application is to provide a backlight structure 100 to solve the technical problem that the light emitted by the backlight structure in the related art is likely to cause a halo phenomenon.

[0034] The backlight structure 100 includes a carrier substrate 10, a plurality of light-emitting elements 20, and a lens assembly 30.

[0035] In this embodiment, the carrier substrate 10 may be a flexible substrate. Optionally, the carrier substrate 10 may be made of any one or more of the following materials: polyimide, polyethylene terephthalate (PET), polyethylene naphthalate two formic acid glycol ester (PEN), cyclo-olefin polymer (COP), polycarbonate (PC), polystyrene (PS), polypropylene (PP), polytetrafluoroethylene (PTFE). In other implementation manners, the carrier substrate 10 may also be a non-flexible substrate, such as glass, ceramic, etc., and the present application does not limit this.

[0036] The plurality of light-emitting elements 20 are disposed on the carrier substrate 10. In this embodiment, taking the light-emitting element 20 as an LED lamp bead as an example, the carrier substrate 10 is an LED lamp board. In other embodiments, the light-emitting element 20 may also be an OLED lamp bead or other types of self-luminous lamp beads, and the present application does not limit this.

[0037] The lens assembly 30 is disposed on the carrier substrate 10, and the lens assembly 30 includes a plurality of Fresnel lenses 31. One Fresnel lens 31 is correspondingly disposed with one light-emitting element 20. The Fresnel lens 31 is used to convert at least part of the visible light emitted by the light-emitting element 20 into visible light perpendicular to the carrier substrate 10. One Fresnel lens 31 can be used to convert the light emitted by one light-emitting element 20 into visible light perpendicular to the display vertical substrate, and the visible light converted by two adjacent Fresnel lenses 31 does not overlap, thereby avoiding phenomena such as halo caused by the overlap of the visible light emitted by two adjacent light-emitting elements 20.

[0038] In the backlight structure 100 provided by the present application, the backlight structure 100 includes a carrier substrate 10, a plurality of the light-emitting components 20 are disposed on the carrier substrate 10, the lens assembly 30 is disposed on the carrier substrate 10, and the lens assembly 30 includes a plurality of Fresnel lenses 31. The Fresnel lenses 31 are arranged corresponding to the light-emitting components 20, and the Fresnel lenses 31 are configured to convert at least part of the visible light emitted by the light-emitting components 20 into visible light perpendicular to the carrier substrate 10. The visible light converted by two adjacent Fresnel lenses 31 does not overlap, thereby avoiding phenomena such as halos caused by the overlap of the visible light emitted by two adjacent light-emitting components 20.

[0039] In this embodiment, the plurality of Fresnel lenses 31 of the lens assembly 30 may be an integral structure. In other words, the plurality of Fresnel lenses 31 are prepared by one process. For the convenience of description in the present application, they are distinguished, which should not be construed as a limitation to the present application. Optionally, the material of the Fresnel lens 31 includes but is not limited to polyolefin, or glass, or other materials, and the present application does not limit this.

[0040] Please refer to Figures 1 to 3 , in one embodiment, the number of the lens assemblies 30 is one, and one lens assembly 30 is arranged corresponding to the plurality of light-emitting components 20. Alternatively, the number of the lens assemblies 30 is multiple, and the multiple lens assemblies 30 are arranged corresponding to the plurality of light-emitting components 20.

[0041] In other words, the number of the lens assemblies 30 can be adjusted according to the size of the backlight structure 100. If the size of the backlight structure 100 is small, only one lens assembly 30 needs to be provided. If the size of the backlight structure 100 is large, two or more lens assemblies 30 can be provided so that each light-emitting component 20 on the backlight structure 100 can be correspondingly provided with a Fresnel lens 31.

[0042] The number of the lens assemblies 30 can be adjusted according to the size of the backlight structure 100 so that the lens assemblies 30 can be adapted to backlight structures 100 of various sizes, which is beneficial to the mass production of the lens assemblies 30 and improves the production efficiency of the lens assemblies 30.

[0043] Please refer to Figures 3 to 4 , Figure 4It is a schematic structural diagram of splicing multiple lens components provided by an embodiment of the present application. In one embodiment, in the lens component 30, each Fresnel lens 31 is paired with four support members to ensure the support stability of the large-area lens component 30. It should be noted that when installing the lens component 30 on the carrier substrate 10, transparent glue can be applied to the bottom of the support members of the lens component 30, and then the lens component 30 is adhered to the carrier substrate 10 and left standing until the glue solidifies to complete the fixed installation.

[0044] Specifically, the multiple support members include a first support member 41, a second support member 42, and a third support member 43. The first support member 41 is located between the four Fresnel lenses 31. The second support member 42 is located at the edge of the lens component 30 and is arranged adjacent to two Fresnel lenses 31. The third support member 43 is located at the edge of the lens component 30 and is arranged adjacent to one Fresnel lens 31. In other words, the second support member 42 is located at the four sides of the lens component 30, and the third support member 43 is located at the four vertices of the lens component 30.

[0045] Two adjacent lens components 30 can be spliced through the second support member 42, and four adjacent lens components 30 can be spliced through the third support member 43. Moreover, in this embodiment, in the thickness direction of the backlight assembly, the area of the first support member 41 is S1, the area of the second support member 42 is S2, and the area of the third support member 43 is S3, and S1, S2, and S3 satisfy: S1 = 2S2 = 4S3.

[0046] Specifically, when two adjacent lens components 30 are spliced, the two opposite second support members 42 can be completely attached and form a structural member similar to the first support member 41. When four adjacent lens components 30 are spliced, the four opposite third support members 43 can be completely attached and form a structural member similar to the first support member 41. Thus, even when multiple lens components 30 are spliced, the connection structure between the lens components 30 is similar to the structure inside the lens component 30, ensuring the stability of the splicing of the multiple lens components 30.

[0047] Please refer to Figure 5 , Figure 5 It is a schematic structural size diagram of corresponding setting of a Fresnel lens and a light-emitting component provided by an embodiment of the present application. In one embodiment, the radial dimension D1 of the Fresnel lens 31 is greater than the radial dimension D2 of the light-emitting component 20 to ensure that the light emitted by the light-emitting component 20 can completely pass through the Fresnel lens 31 and be adjusted into vertical light.

[0048] Furthermore, in the thickness direction of the backlight structure 100, the distance between the side of the Fresnel lens 31 away from the axis and the light-emitting element 20 is H, and the radial dimension D1 of the Fresnel satisfies: D1≥D2+H*tan30°, so as to ensure that the light emitted by the light-emitting element 20 toward the most deviated angle (120°) can also enter the Fresnel lens 31 and be adjusted to vertical light through the Fresnel lens 31.

[0049] In one embodiment, the backlight structure 100 further includes a blocking member, which is disposed on the supporting substrate 10 and encloses a receiving space, wherein the receiving space is used to receive the lens assembly 30, and the blocking member is used to limit the position of the lens assembly 30. The blocking member limits the movement of the lens assembly 30 during installation, and the blocking member can facilitate the installation and positioning of the lens assembly 30, thereby preventing the Fresnel lens 31 of the lens assembly 30 from being offset relative to the light-emitting member 20.

[0050] Furthermore, in one embodiment, in the thickness direction of the backlight structure 100 , the size of the blocking member is smaller than the size of the lens assembly 30 , which can facilitate installing the lens assembly 30 into the receiving space formed by the blocking member or removing the lens assembly 30 .

[0051] Please refer to Figure 6 , Figure 6 1 is a schematic diagram of a display device provided in an embodiment of the present application. The present application also provides a backlight module 1000, the backlight module 1000 includes a back plate 50, a middle frame 60 and the backlight structure 100, the backlight structure 100 is arranged on the back plate 50, the middle frame 60 surrounds the outer periphery of the back plate 50, and the middle frame 60 is used to set the display panel 2000.

[0052] Please refer to Figure 6 In one embodiment, the backlight module 1000 also includes an optical film layer 70, the back panel 50 includes a bottom panel and a side panel surrounding the bottom panel, the backlight structure 100 is disposed on the bottom panel, the optical film layer 70 is fixed on the side panel, and the optical film layer 70 is disposed on a side of the optical structure away from the bottom panel, and the optical film layer 70 is used to homogenize the visible light emitted by the optical structure, thereby further improving the effect of reducing the halo.

[0053] Please refer to Figure 6 The present application also provides a display device 1 , which includes a display panel 2000 and the backlight module 1000 , and the display panel 2000 is disposed on the middle frame 60 .

[0054] Optionally, the display device 1 includes, but is not limited to, display devices such as computers, mobile phones, large monitors, etc.

[0055] The above are some embodiments of the present application. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present application, several improvements and refinements can be made, and these improvements and refinements are also regarded as the protection scope of the present application.

Claims

1. A backlight structure, characterized in that, Comprising: A carrier substrate; A plurality of light-emitting elements, which are disposed on the carrier substrate; And A lens assembly, which is disposed on the carrier substrate, and the lens assembly includes a plurality of Fresnel lenses. The Fresnel lenses are correspondingly arranged with the light-emitting elements, and the Fresnel lenses are used to convert at least part of the visible light emitted by the light-emitting elements into visible light perpendicular to the carrier substrate.

2. The backlight structure according to claim 1, wherein The number of the lens assemblies is one, and one lens assembly is correspondingly arranged with the plurality of light-emitting elements; or the number of the lens assemblies is multiple, and the multiple lens assemblies are correspondingly arranged with the plurality of light-emitting elements.

3. The backlight structure according to claim 2, wherein, The lens assembly includes a first support member, a second support member, and a third support member. The first support member is located between the four Fresnel lenses. The second support member is located at the edge of the lens assembly and is arranged adjacent to two of the Fresnel lenses. The third support member is located at the edge of the lens assembly and is arranged adjacent to one of the Fresnel lenses. Adjacent two lens assemblies can be spliced through the second support member, and adjacent four lens assemblies can be spliced through the third support member.

4. The backlight structure according to claim 1, wherein The radial dimension D1 of the Fresnel lens is greater than the radial dimension D2 of the light-emitting element.

5. The backlight structure according to claim 4, characterized in that In the thickness direction of the backlight structure, the distance between the side of the Fresnel lens away from the axis and the light-emitting element is H, and the radial dimension D1 of the Fresnel lens satisfies: D1≥D2 + H*tan30°.

6. The backlight structure according to claim 1, wherein The backlight structure further includes a blocking member, which is disposed on the carrier substrate and encloses to form a receiving space for receiving the lens assembly, and the blocking member is used to limit the lens assembly.

7. The backlight structure according to claim 6, wherein In the thickness direction of the backlight structure, the dimension of the blocking member is smaller than the dimension of the lens assembly.

8. A backlight module, characterized in that, Comprising a back plate, a middle frame, and the backlight structure according to any one of claims 1-7. The backlight structure is disposed on the back plate, and the middle frame surrounds the outer periphery of the back plate, and the middle frame is used to arrange a display panel.

9. The backlight module according to claim 8, wherein, The backlight module further includes an optical film layer. The back plate includes a bottom plate and side plates surrounding the bottom plate. The backlight structure is disposed on the bottom plate, and the optical film layer is fixed on the side plates and is disposed on the side of the backlight structure away from the bottom plate, and the optical film layer is used to homogenize the visible light emitted by the backlight structure.

10. A display device, characterized in that, Comprising a display panel and the backlight module according to any one of claims 8-9. The display panel is disposed on the middle frame.

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