Light homogenizing assembly, backlight module, double-sided display device and projection display device

Abstract

The application relates to a light homogenizing assembly, a backlight module, a double-sided display device and a projection display device. The light homogenizing assembly comprises: at least two layers of shells which are nested from inside to outside, a plurality of hollow parts are arranged on each shell; a plurality of lenses with different refractive indexes, the lenses are arranged in the hollow parts; and a first driving assembly connected with the at least two layers of shells, used for driving the shells to rotate around the axes of the shells, so that the lenses corresponding to the at least two layers of shells form a plurality of lens groups with different refractive indexes. Compared with the related art, the light homogenizing effect can be diversified without disassembling and recombining the light homogenizing assembly, the process is simplified, and the labor cost is reduced.

Description

Technical Field

[0001] This application relates to the field of optical technology, and in particular to a light-diffusing component, a backlight module, a double-sided display device, and a projection display device. Background Technology

[0002] In recent years, with the continuous advancement of display technology, users have increasingly higher requirements for the display quality of display devices.

[0003] In related technologies, optical components in display devices can control the light emitted by LED beads. Specifically, lenses in the optical components can change the propagation path of light, thereby altering the display effect of display devices such as display screens and projectors.

[0004] However, in related technologies, replacing the lens in the optical components requires disassembling and reassembling the optical components in the display screen or projector, which is a complicated process and has high labor costs. Summary of the Invention

[0005] This application aims to provide a light-uniforming component, a backlight module, a double-sided display device, and a projection display device to solve the technical problems of the prior art, which require disassembling and reassembling the display screen or projector to replace the lenses in the optical components in order to adjust the light-uniforming effect of the display screen or projector, resulting in complicated procedures and high labor costs.

[0006] In a first aspect, embodiments of this application propose a light-uniforming component, comprising: at least two nested shells arranged from the inside out, each shell having a plurality of hollow portions; a plurality of lenses with different refractive indices disposed in the hollow portions; and a first driving component connected to the at least two shells for driving the shells to rotate around their own axes, so that the lenses corresponding to the at least two shells form a lens group with multiple refractive indices.

[0007] In one possible implementation, the housing is a cylinder or a sphere, and multiple lenses are spaced apart along the outer periphery of the housing.

[0008] In one possible implementation, each housing layer includes at least four lenses, which are symmetrically distributed along the outer periphery of the housing.

[0009] In one possible implementation, the area of ​​the openwork portion of at least two shell layers increases sequentially from the inside to the outside.

[0010] In one possible implementation, the first drive assembly includes a first fixed bracket, at least two first rotating disks, and at least two first drive motors. The first drive motors are connected to the first fixed bracket, one end of the first rotating disk is connected to the output shaft of the first drive motor, and the other end of the first rotating disk is connected to the housing to drive the housing to rotate around its own axis.

[0011] Secondly, this application provides a backlight module, including: a lamp board, including a circuit board and lamp beads disposed on the circuit board; and a light-diffusing component as mentioned in the first aspect, wherein the light-diffusing component is sleeved on the outer periphery of the lamp beads, and the light emitted by the lamp beads passes through at least two layers of housing corresponding to lenses to form a lens group with multiple refractive indices and is emitted, and the first driving component of the light-diffusing component drives the housing to rotate around its own axis to adjust the light-diffusing effect of the emitted light from the lamp beads.

[0012] In one possible implementation, the housing is a sphere, the lamp panel includes multiple lamp beads distributed in an array, and there are multiple light-diffusing components, with each light-diffusing component corresponding to one of the multiple lamp beads.

[0013] In one possible implementation, the housing is a column, the lamp panel includes multiple lamp strips arranged side by side, each lamp strip includes multiple LED beads distributed along the row or column direction, and multiple light-diffusing components correspond one-to-one with the multiple lamp strips.

[0014] Thirdly, embodiments of this application propose a double-sided display device, comprising: a first display panel and a second display panel disposed opposite to each other; a backlight module as mentioned in the second aspect, disposed between the first display panel and the second display panel; and a second driving component connected to the lamp board of the backlight module, for driving the lamp board to rotate so that the light emission direction of the lamp board is toward the first display panel and / or the second display panel.

[0015] Fourthly, embodiments of this application propose a projection display device, comprising: a light source for emitting a light beam; a light homogenizing component as mentioned in the first aspect, disposed in the light emission direction of the light source for homogenizing the light beam; a lens assembly and an image display chip, the lens assembly being disposed between the light homogenizing component and the image display chip for converging the homogenized light beam onto the image display chip to form an illumination spot; and a lens for projecting image information emitted from the image display chip onto a screen.

[0016] This application provides a light-diffusing component, a backlight module, a double-sided display device, and a projection display device. The light-diffusing component includes: at least two nested housings from the inside out, each housing having multiple cutouts; multiple lenses disposed in the cutouts; and a first driving component connected to the at least two housings for driving the housings to rotate around their own axes, thereby forming a lens group with multiple refractive indices using the lenses corresponding to the at least two housings. By rotating the housings using the first driving component, the lenses located on different housing layers are aligned in a straight line, forming a lens group with multiple refractive indices, thus changing the light-diffusing effect of the light-diffusing component. Compared to related technologies, this application eliminates the need for disassembly and reassembly of the light-diffusing component, simplifying the process and reducing labor costs. Attached Figure Description

[0017] The features, advantages, and technical effects of exemplary embodiments of the present application will now be described with reference to the accompanying drawings. In the drawings, the same components are referred to by the same reference numerals. The drawings are not drawn to scale and are only used to illustrate relative positions. The layer thicknesses in some areas are exaggerated for ease of understanding; the layer thicknesses in the drawings do not represent actual layer thickness proportions.

[0018] Figure 1 This diagram shows a structural schematic of a light-diffusing component provided in Embodiment 1 of this application;

[0019] Figure 2 This paper shows a schematic diagram of another light-diffusing component provided in Embodiment 1 of this application;

[0020] Figure 3 This shows a schematic diagram of the structure of the first driving component in the light-uniforming component provided in Embodiment 1 of this application;

[0021] Figure 4 This diagram shows the structure of the LED beads in the backlight module provided in Embodiment 2 of this application;

[0022] Figure 5 This diagram illustrates the structure of a backlight module according to Embodiment 2 of this application.

[0023] Figure 6 This diagram illustrates the structure of another backlight module provided in Embodiment 2 of this application;

[0024] Figure 7 This diagram illustrates the structure of the double-sided display device provided in Embodiment 3 of this application.

[0025] Figure 8 This diagram illustrates the structure of the second driving component in the double-sided display device provided in Embodiment 3 of this application.

[0026] Figure 9 This is a structural schematic diagram showing the display effect of the first type of double-sided display device provided in Embodiment 3 of this application;

[0027] Figure 10 This is a structural schematic diagram showing the display effect of the second type of double-sided display device provided in Embodiment 3 of this application;

[0028] Figure 11 This is a schematic diagram showing the display effect of the third type of double-sided display device provided in Embodiment 3 of this application;

[0029] Figure 12 This diagram illustrates the structure of a projection display device provided in Embodiment 4 of this application.

[0030] Figure label:

[0031] 100. Light-diffusing component;

[0032] 10. Shell; 11. Openwork section;

[0033] 20. Lens;

[0034] 30. First drive assembly; 31. First fixed bracket; 32. First rotating disk; 33. First drive motor;

[0035] 200. Backlight module; 40. Lamp board; 41. Circuit board; 42. LED chip; 43. LED strip; 44. Reflector bowl;

[0036] 300. Double-sided display device; 51. First display panel; 52. Second display panel; 60. Second drive assembly; 61. Second fixed bracket; 62. Second rotating disk; 63. Second drive motor;

[0037] 400. Projection display device; 401. Light source; 402. Lens assembly; 403. Image display chip. Detailed Implementation

[0038] The features and exemplary embodiments of various aspects of this application will now be described in detail. Numerous specific details are set forth in the following detailed description to provide a comprehensive understanding of this application. However, it will be apparent to those skilled in the art that this application can be implemented without some of these specific details. The following description of embodiments is merely intended to provide a better understanding of this application by illustrating examples. In the accompanying drawings and the following description, at least some well-known structures and techniques are not shown to avoid unnecessarily obscuring the application; and, for clarity, the dimensions of the regional structures may be exaggerated. Furthermore, the features, structures, or characteristics described below can be combined in any suitable manner in one or more embodiments.

[0039] In related technologies, adjusting the light uniformity of a display device requires replacing the lenses in the optical components, which necessitates disassembling and reassembling the optical components in the display device, such as a display screen or projector. However, these technologies involve cumbersome procedures, high labor costs, and are prone to causing secondary pollution.

[0040] In view of this, embodiments of this application provide a light-uniforming component, a backlight module, a double-sided display device, and a projection display device. The first driving component rotates the housing to arrange lenses located on different layers of the housing in a straight line, forming a lens group with multiple refractive indices, thereby changing the light-uniforming effect of the light-uniforming component. This eliminates the need for disassembly and reassembly of the light-uniforming component, simplifying the process, reducing labor costs, and avoiding secondary pollution.

[0041] The specific structures of the uniform light component, backlight module, double-sided display device, and projection display device provided in the embodiments of this application are described below with reference to the accompanying drawings.

[0042] First Embodiment

[0043] Figure 1 This is a schematic diagram of the structure of a light-diffusing component 100 provided in Embodiment 1 of this application; Figure 2 This is a schematic diagram of another light-diffusing component 100 provided in Embodiment 1 of this application.

[0044] See Figure 1 and Figure 2 Embodiment 1 of this application provides a light-diffusing component 100, comprising:

[0045] At least two nested shells 10 are arranged from the inside out, and each shell 10 is provided with multiple hollow parts 11.

[0046] Multiple lenses 20 with different refractive indices are disposed in the hollowed-out portion 11.

[0047] And a first drive assembly 30, connected to at least two housings 10, for driving the housings 10 to rotate about their own axis so that the lenses 20 corresponding to the at least two housings 10 form a lens group with multiple refractive indices.

[0048] Specifically, by rotating the housing 10, multiple lenses 20 on different layers of the housing 10 can be combined to form lens groups with different refractive indices. When the light to be homogenized is emitted from the lens groups with different refractive indices, different homogenization effects can be achieved.

[0049] The housing 10 is made of non-transparent material, and the distance between housings 10 should be minimized to better collect light and reduce light loss.

[0050] It is worth noting that the shells 10 of different layers rotate coaxially to avoid the two adjacent shells 10 colliding with each other when the first drive assembly 30 drives the shell 10 to rotate; and to avoid the distance between the lenses 20 corresponding to the two shells 10 being inconsistent.

[0051] In this embodiment, at least two nested shells 10 are arranged from the inside out, each shell 10 having multiple hollow portions 11; multiple lenses 20 with different refractive indices are disposed in the hollow portions 11; and a first driving assembly 30 is connected to the at least two shells 10 to drive the shells 10 to rotate around their own axes, so that the lenses 20 corresponding to the at least two shells 10 form lens groups with multiple refractive indices. Compared with related technologies, this application can obtain lens groups with different refractive indices without disassembling and reassembling the light-diffusing assembly 100, thereby achieving different light-diffusing effects, simplifying the process, reducing labor costs, and avoiding secondary pollution.

[0052] In some embodiments, the housing 10 is a cylinder or a sphere, and a plurality of lenses 20 are spaced apart along the outer periphery of the housing 10.

[0053] Specifically, Figure 1 The housing 10 of the light-diffusing component 100 shown is a sphere; Figure 2 The housing 10 of the light-diffusing component 100 shown is a column. Figure 1 The light homogenizing component 100 shown can homogenize the light emitted by a single point light source. Figure 2 The light homogenizing component 100 shown can homogenize the light emitted by multiple point light sources arranged in a row or column. For the light source to be homogenized, Figure 1 The light-diffusing component 100 shown can more precisely adjust the emitted light to achieve a variety of light-diffusing effects; Figure 2 The light-diffusing component 100 shown has a simpler structure and is easier to manufacture.

[0054] In some embodiments, each housing 10 includes at least four lenses 20, which are symmetrically distributed along the outer periphery of the housing 10. That is, the angle between the lines connecting two adjacent lenses 20 and the location of the light source to be homogenized is 90°. This ensures that the light to be homogenized can only be emitted from the lens 20 located in its light-emitting direction, making the homogenization effect controllable.

[0055] In some embodiments, the area of ​​the openwork portion 11 of at least two housing layers 10 increases sequentially from the inside to the outside. Due to the divergence of light, the sequential increase in the area of ​​the openwork portion 11 from the inside to the outside, i.e., the sequential increase in the area of ​​the lens 20 from the inside to the outside, allows all light to enter the lens 20, avoiding waste of light source.

[0056] In other embodiments, the area of ​​the hollow portion 11 in each shell 10 is equal. Since the area of ​​the hollow portion 11 in each shell 10 is equal, the area of ​​the lens 20 in each shell 10 is equal. This facilitates the replacement of the lens 20, eliminates the need to produce lenses 20 of various sizes, and reduces production and processing costs.

[0057] In some embodiments, the first drive assembly 30 includes a first fixed bracket 31, at least two first rotating disks 32 and at least two first drive motors 33. The first drive motors 33 are connected to the first fixed bracket 31, one end of the first rotating disk 32 is connected to the output shaft of the first drive motor 33, and the other end of the first rotating disk 32 is connected to the housing 10 to drive the housing 10 to rotate around its own axis.

[0058] Figure 3 This diagram illustrates the structure of the first driving component 30 in the light-diffusing component 100 provided in Embodiment 1 of this application. Figure 3 As shown, the first drive motor 33 operates, driving the turntable to rotate, which in turn drives the housing 10 to rotate.

[0059] In this embodiment, at least two nested shells 10 are arranged from the inside out, each shell 10 having multiple hollow portions 11; multiple lenses 20 with different refractive indices are disposed in the hollow portions 11; and a first driving assembly 30 is connected to the at least two shells 10 to drive the shells 10 to rotate around their own axes, so that the lenses 20 corresponding to the at least two shells 10 form lens groups with multiple refractive indices. Compared with related technologies, this application can obtain lens groups with different refractive indices without disassembling and reassembling the light-uniforming assembly 100, thereby achieving different light-uniforming effects, simplifying the process, reducing labor costs, and avoiding secondary pollution. The shells 10 are set as cylinders or spheres to achieve light uniformity for multiple point light sources arranged in rows or columns or for light emitted from a single point light source. The angle between the line connecting two adjacent lenses 20 and the position of the light source to be uniformized is set to 90°, so that the light to be uniformized can only be emitted from the set lens group, thus better controlling the light uniformity effect. The area of ​​the hollowed-out part 11 increases gradually from the inside to the outside to avoid wasting light.

[0060] Second Embodiment

[0061] This application provides a backlight module 200, including: a lamp board 40, including a circuit board 41 and lamp beads 42 disposed on the circuit board 41; and a light-diffusing component 100 as mentioned in the first embodiment, the light-diffusing component 100 being sleeved on the outer periphery of the lamp beads 42, the light emitted by the lamp beads 42 passing through at least two lenses 20 corresponding to the housing 10 to form a lens group with multiple refractive indices and being emitted, the first driving component 30 of the light-diffusing component 100 driving the housing 10 to rotate around its own axis to adjust the light-diffusing effect of the emitted light from the lamp beads 42.

[0062] The LED chip 42 can be a standard-sized light-emitting diode (LED), or any of the following: a micro-LED or a mini-LED. Micro-LEDs refer to LED chips with a die size of less than 100 micrometers, while Mini-LEDs refer to LED chips with a die size of approximately 100 to 300 micrometers. LEDs, Mini-LEDs, or Micro-LEDs can be used as self-emissive display elements, offering advantages such as low power consumption, high brightness, high resolution, high color saturation, fast response time, long lifespan, and high efficiency.

[0063] The LED lamp beads 42 are made of acrylic material, which has advantages such as higher transparency, chemical stability, mechanical properties, weather resistance, easy color transmission, easy processing, and beautiful appearance. This enables the LED backlight display module to have high brightness, and improves the clarity and color rendering of the image when the display module is displaying images.

[0064] The connection between the LED beads 42 can be either series or parallel. Series connection allows for unified control and is low-cost, while parallel connection allows for individual control of each LED bead 42, enabling multi-level adjustment of the light-emitting unit.

[0065] In this embodiment, a reflector bowl is provided on the backlight side of the LED bead 42. The reflector bowl is a reflective optical component. The reflector bowl is integrated with the light source and reflects the light emitted by the LED bead 42 to a specific direction. An ellipsoidal reflector bowl is a very common type of reflector bowl for collecting light energy.

[0066] Figure 4 This diagram illustrates the structure of the LED chip 42 in the backlight module 200 provided in Embodiment 2 of this application. Figure 4 As shown, the light emitted by the lamp bead 42 shines on the reflector bowl 44 and is reflected to a certain degree of collimation, further controlling the emission range of the light.

[0067] The light reflected by the reflector bowl 44 enters the light-diffusing assembly 100. In related technologies, the light-diffusing assembly 100 of the backlight module 200 consists of several fixed lenses, resulting in a fixed light-diffusing effect. This application allows for the rotation of the first driving component 30 in the light-diffusing assembly 100, causing the lenses 20 corresponding to at least two layers of housing 10 to form a lens group, thereby changing the refractive index of the emitted light and altering the light-diffusing effect. This application eliminates the need to disassemble the backlight module 200; simply replacing the lenses 20 in the light-diffusing assembly 100 allows for adjustments to various light-diffusing effects, enabling adjustable light direction, increasing the diversity of backlight displays, simplifying the process, reducing labor costs, and avoiding secondary pollution.

[0068] In some embodiments, the housing 10 is a sphere, the lamp panel 40 includes a plurality of lamp beads 42 arranged in an array, and the number of light-diffusing components 100 is multiple, with each of the multiple light-diffusing components 100 corresponding to one of the multiple lamp beads 42.

[0069] Figure 5 This diagram illustrates the structure of a backlight module 200 according to Embodiment 2 of this application. Figure 5As shown, the light-diffusing assembly consists of over 100 layers of housings 10 nested around the outside of a single LED bead 42. The light emitted by the LED bead 42 passes through the lens 20 corresponding to each housing layer 10, i.e., the light passes through the lens group, completing the light diffusing and emission. Furthermore, the lens 20 corresponding to each housing layer 10 on the light side of each LED bead 42 can be replaced individually to adjust the light diffusing effect of the emitted light from a single LED bead 42, thereby achieving fine control over the light diffusing effect.

[0070] In some embodiments, the housing 10 is a column, the lamp panel 40 includes a plurality of lamp strips 43 arranged side by side, each lamp strip 43 includes a plurality of lamp beads 42 distributed along the row direction or column direction, and a plurality of light-diffusing components 100 correspond one-to-one with the plurality of lamp strips 43.

[0071] Figure 6 This diagram illustrates the structure of another backlight module 200 provided in Embodiment 2 of this application. Figure 6 As shown, the light-diffusing assembly consists of over 100 layers of housings 10 nested around multiple LED beads 42. The light emitted by the LED beads 42 passes through the lens 20 corresponding to each housing layer 10, i.e., the light passes through the lens group, completing the light diffusing and emission. By uniformly replacing the lens 20 corresponding to each housing layer 10 on the outside of multiple LED beads 42, the light diffusing effect of the emitted light from multiple LED beads 42 can be uniformly adjusted. This method is highly efficient in adjusting the light diffusing effect, has a simple structure, and is easy to manufacture.

[0072] In this embodiment, this application provides a backlight module 200. By rotating the first driving component 30 in the light-diffusing assembly 100, the lenses 20 corresponding to at least two layers of housing 10 form a lens group, thereby changing the refractive index of the emitted light and altering the light-diffusing effect. This application eliminates the need to disassemble the backlight module 200; simply replacing the lenses 20 in the light-diffusing assembly 100 allows for adjustments to various light-diffusing effects, simplifying the process, reducing labor costs, and avoiding secondary pollution. Furthermore, this application provides two types of light-diffusing assemblies 100 suitable for the backlight module 200. One type of light-diffusing assembly 100 can adjust the light-diffusing effect of a single LED bead 42, thereby achieving precise control of the light-diffusing effect. The other type of light-diffusing assembly 100 can uniformly adjust the light-diffusing effect of multiple LED beads 42, offering high efficiency in adjusting the light-diffusing effect, a simple structure, and ease of manufacturing.

[0073] Third Embodiment

[0074] Figure 7 This diagram illustrates the structure of the double-sided display device 300 provided in Embodiment 3 of this application; as shown Figure 7 As shown, this application provides a double-sided display device 300, comprising:

[0075] The first display panel 51 and the second display panel 52 are arranged opposite to each other; the backlight module 200 mentioned in the second embodiment is disposed between the first display panel 51 and the second display panel 52; and the second driving component 60 is connected to the lamp plate 40 of the backlight module 200 and is used to drive the lamp plate 40 to rotate so that the light emission direction of the lamp plate 40 is toward the first display panel 51 and / or the second display panel 52.

[0076] Figure 8 This diagram illustrates the structure of the second driving component 60 in the double-sided display device 300 provided in Embodiment 3 of this application. Figure 8 As shown, the second drive assembly 60 includes a second fixed bracket 61, a second rotating disk 62 and a second drive motor 63. The second drive motor 63 is connected to the second fixed bracket 61. One end of the second rotating disk 62 is connected to the output shaft of the second drive motor 63. The other end of the first rotating disk 62 is connected to the lamp panel 40 to drive the lamp panel 40 to rotate around its own axis.

[0077] In some embodiments, the number of second driving components 60 is one, which controls the backlight module 200 to emit light toward the first display panel 51 or the second display panel 52, that is, the first display panel 51 or the second display panel 52 displays an image.

[0078] Figure 9 This is a structural schematic diagram showing the display effect of the first type of double-sided display device 300 provided in Embodiment 3 of this application; Figure 10 This is a structural schematic diagram showing the display effect of the second type of double-sided display device 300 provided in Embodiment 3 of this application. Figure 9 The backlight module 200 faces the first display panel 51 (arrow indicates the direction of light emission), and the first display panel 51 displays the image; Figure 10 The backlight module 200 faces the second display panel 52 (arrows indicate the direction of light emission), and the second display panel 52 displays the image.

[0079] In other embodiments, there are multiple second driving components 60, with each light strip 43 connected to one second driving component 60. The light emission direction of each light strip 43 can be controlled to face either the first display panel 51 or the second display panel 52. That is, some light strips 43 face the first display panel 51, and other light strips 43 face the second display panel 52 (arrows indicate the light emission direction). The first display panel 51 and the second display panel 52 can display images simultaneously.

[0080] Figure 11 This diagram illustrates the structural effect of the third type of double-sided display device 300 provided in Embodiment 3 of this application; as shown Figure 11 As shown, the first display panel 51 and the second display panel 52 can display images simultaneously.

[0081] In this embodiment, the backlight module 200 is rotated 360° by the second driving component 60, allowing it to emit light towards the first display panel 51 and / or the second display panel 52. Furthermore, by rotating the first driving component 30 of the light-diffusing component 100 in the backlight module 200, the lenses 20 corresponding to at least two layers of housing 10 form a lens group, thereby changing the refractive index of the emitted light, altering the light-diffusing effect, and achieving diversified backlight display. Moreover, this application eliminates the need for disassembly and installation of the lenses 20 in the light-diffusing component 100, simplifying the process, reducing labor costs, and avoiding secondary pollution.

[0082] Fourth embodiment

[0083] Figure 12 This diagram illustrates the structure of a projection display device 400 according to Embodiment 4 of this application. Figure 12 As shown, this application provides a projection display device 400, including:

[0084] The light source 401 is used to emit a light beam; the light homogenizing component 100, as in the first embodiment, is disposed in the light emission direction of the light source 401 and is used to homogenize the light beam; the lens assembly 402 and the image display chip 403 are disposed between the light homogenizing component 100 and the image display chip 403, and are used to converge the homogenized light beam to the image display device to form an illumination spot; and the lens (not shown in the figure) is used to project the image information emitted from the image display chip 403 onto the screen.

[0085] It is understood that the array substrate technical solutions provided in the embodiments of this application can be widely used in 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.

[0086] It should be readily understood that the terms “on,” “above,” and “on top of” in this application should be interpreted in the broadest possible sense, such that “on” means not only “directly on something” but also “on something” with an intermediate feature or layer therebetween, and that “above” or “on top of” means not only “on top of something” but also “on top of something” without an intermediate feature or layer therebetween (i.e., directly on something).

[0087] As used herein, the term "substrate" refers to the 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. Furthermore, the substrate may comprise a wide range of materials, such as silicon, germanium, gallium arsenide, indium phosphide, etc. Alternatively, the substrate may be made of a non-conductive material (e.g., glass, plastic, or sapphire wafers).

[0088] The term "layer" as used herein can refer to a portion of material comprising a region of thickness. A layer may extend over the entire underlying or overlying structure, or may have a extent smaller than that of the underlying or overlying structure. Furthermore, a layer may be a region of a homogeneous or non-homogeneous continuous structure, with a thickness less than that of the continuous structure. For example, a layer may be located between the top and bottom surfaces of a continuous structure, or between any pairs of lateral planes at the top and bottom surfaces. A layer may extend laterally, vertically, and / or along a tapered surface. A substrate may be a layer, and may include one or more layers, and / or may have one or more layers located on, above, and / or below it. A layer may include multiple layers. For example, an interconnect layer may include one or more conductor and contact layers (forming contacts, interconnects, and / or vias therein) and one or more dielectric layers.

[0089] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A backlight module, characterized in that, include: A light panel, including a circuit board and LEDs disposed on the circuit board; as well as A light-diffusing assembly includes at least two nested shells, multiple lenses with different refractive indices, and a first driving assembly. Each shell has multiple cutouts, and the lenses are disposed in the cutouts. The first driving assembly is connected to the at least two shells and is used to drive the shells to rotate around their own axes so that the lenses corresponding to the at least two shells form a lens group with multiple refractive indices. The light-diffusing component is sleeved on the outer periphery of the lamp bead. The light emitted by the lamp bead passes through the lenses corresponding to the at least two layers of housing to form a lens group with multiple refractive indices before exiting. The first driving component of the light-diffusing component drives the housing to rotate around its own axis to adjust the light-diffusing effect of the light emitted by the lamp bead.

2. The backlight module according to claim 1, characterized in that, The housing is a cylinder or a sphere, and the plurality of lenses are spaced apart along the outer periphery of the housing.

3. The backlight module according to claim 2, characterized in that, Each layer of the housing includes at least four lenses, which are symmetrically distributed along the outer periphery of the housing.

4. The backlight module according to claim 1, characterized in that, The area of ​​the hollow portion of the at least two shell layers increases sequentially from the inside to the outside.

5. The backlight module according to claim 1, characterized in that, The first drive assembly includes a first fixed bracket, at least two first rotating disks, and at least two first drive motors. The first drive motors are connected to the first fixed bracket. One end of the first rotating disk is connected to the output shaft of the first drive motor, and the other end of the first rotating disk is connected to the housing to drive the housing to rotate around its own axis.

6. The backlight module according to any one of claims 1-5, characterized in that, The housing is a sphere, the lamp panel includes multiple lamp beads arranged in an array, and there are multiple light-diffusing components, with each of the multiple light-diffusing components corresponding to one of the multiple lamp beads.

7. The backlight module according to any one of claims 1-5, characterized in that, The housing is a column, and the lamp panel includes multiple lamp strips arranged side by side. Each lamp strip includes multiple LED beads distributed along the row or column direction. The multiple light-diffusing components correspond one-to-one with the multiple lamp strips.

8. A double-sided display device, characterized in that, include: The first and second display panels are set relative to each other; The backlight module as described in any one of claims 1 to 7 is disposed between the first display panel and the second display panel; as well as The second driving component is connected to the lamp panel of the backlight module and is used to drive the lamp panel to rotate so that the light emission direction of the lamp panel is toward the first display panel and / or the second display panel.

9. A projection display device, characterized in that, include: A light source used to emit a beam of light; A light-uniforming component includes at least two nested housings, multiple lenses with different refractive indices, and a first driving component. Each housing has multiple cutouts, and the lenses are disposed in the cutouts. The first driving component is connected to the at least two housings and drives the housings to rotate around their own axes, so that the lenses corresponding to the at least two housings form a lens group with multiple refractive indices. The light-uniforming component is positioned in the light-emitting direction of the light source and is used to uniformly distribute the light beam. The lens assembly and the image display chip are provided. The lens assembly is disposed between the light homogenizing assembly and the image display device, and is used to focus the homogenized light beam onto the image display device to form an illumination spot. as well as A lens is used to project image information emitted from the image display device onto a screen.

Images