CN215116986U - Backlight device, head-up display and vehicle - Google Patents

Abstract

The utility model discloses an at least embodiment provides a backlight device, new line display and vehicle. Wherein, backlight unit includes reflective structure, and reflective structure includes: the inner surface of each splicing unit is provided with a reflecting layer, and the at least two splicing units are connected along a preset direction to form a reflecting structure; wherein, each of at least one splicing unit comprises at least two reflecting layers arranged at an included angle. The utility model discloses the inhomogeneous problem of coating film of HUD reflecting structure internal reflection face among the correlation technique has been solved effectively.

Description

Backlight device, head-up display and vehicle

Technical Field

The utility model relates to a backlight device, new line display and vehicle.

Background

At present, HUD (head up display) projects light rays emitted by an image source onto an imaging window, an imaging plate, a windshield and the like through reflective optical design, a driver can directly see a picture without lowering head, driving safety factor is improved, and better driving experience can be brought to the driver.

SUMMERY OF THE UTILITY MODEL

A primary object of the present invention is to provide a backlight device, a head-up display and a vehicle, which can solve the problem of uneven coating of the reflective surface inside the reflective structure in the backlight device of the HUD in the related art.

In order to achieve the above object, according to an aspect of the present invention, there is provided a backlight device including a reflection structure, the reflection structure including: the inner surface of each splicing unit is provided with a reflecting layer, and the at least two splicing units are connected along a preset direction to form a reflecting structure; wherein, each of at least one splicing unit comprises at least two reflecting layers arranged at an included angle.

For example, adjacent splicing units are connected through a clamping component, the clamping component comprises at least one clamping protrusion and at least one clamping groove, and the clamping protrusion is matched with the clamping groove; and/or a positioning assembly is arranged between the adjacent splicing units, the positioning assembly comprises a positioning bulge and a groove, and the positioning bulge is matched with the groove.

For example, the clamping protrusion is arranged on the outer surface of the splicing unit; each splicing unit is provided with a splicing surface, the splicing surface faces to the other splicing unit adjacent to the splicing surface, and the positioning protrusions are arranged on the splicing surfaces.

For example, the at least two stitching units are two stitching units.

For example, the at least two stitching units comprise a first stitching unit and a second stitching unit; the first splicing unit comprises a first plate body, a second plate body and a third plate body which are connected in sequence, the first plate body and the third plate body are arranged oppositely, and the second splicing unit and the second plate body are arranged oppositely; alternatively, the first and second electrodes may be,

the first splicing unit comprises a first plate body and a second plate body which are connected with each other, the second splicing unit comprises a third plate body and a fourth plate body which are connected with each other, the first plate body is connected with the fourth plate body, and the second plate body is connected with the third plate body.

For example, the reflective structure has a first opening, a reflective chamber including a reflective layer, and a second opening, the first opening communicates with the second opening through the reflective chamber, and the size of the reflective chamber gradually increases along a direction from the first opening to the second opening.

For example, a cross-section of the reflection chamber perpendicular to the direction of the first opening to the second opening includes one of a polygon, a circle, or an ellipse.

For example, each of the splice units is a unitary structure.

For example, the backlight device further includes: a light source, the reflective structure configured to reflect light emitted by the light source.

According to an aspect of the present invention, there is provided a backlight device, comprising a reflection structure, wherein the reflection structure comprises at least two splicing units, a reflection layer is disposed on an inner surface of each splicing unit, and the at least two splicing units are connected along a predetermined direction to form the reflection structure; the at least two splicing units are a first splicing unit and a second splicing unit, the first splicing unit and the second splicing unit are both of curved surface structures, and two end faces of each curved surface structure are located in the same plane.

According to another aspect of the present invention, there is provided a head-up display including the above-mentioned backlight device.

According to another aspect of the present invention, there is provided a vehicle comprising the above head-up display.

Use the technical scheme of the utility model, backlight device's reflection configuration is the pin-connected panel structure, when needs carry out the coating film to reflection configuration's internal surface, at first to the independent coating film of the internal surface of each concatenation unit. And after the inner surfaces of the splicing units are coated, connecting at least two splicing units along a preset direction to form a reflection structure in a surrounding manner. Because each concatenation unit coating film alone to make reflective structure's coating film more even, unanimous, and then make reflective structure's coating film operation easier, simple and convenient, solved the inhomogeneous problem of coating film of HUD reflective structure internal reflection face among the correlation technique, promoted reflective structure's light utilization ratio.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 shows an exploded view one of some embodiments of a reflective structure of a backlight according to the present invention;

FIG. 2 shows a top view of the reflective structure of FIG. 1;

FIG. 3 shows a first angled perspective view of the reflective structure of FIG. 1;

FIG. 4 shows a second angled perspective view of the reflective structure of FIG. 1;

FIG. 5 shows a side view of the reflective structure of FIG. 1;

fig. 6 shows an exploded view two of some embodiments of a reflective structure according to the present invention;

FIG. 7 shows a top view of the reflective structure of FIG. 6;

FIG. 8 shows a side view of the reflective structure of FIG. 6; and

fig. 9 shows a schematic structural view of some embodiments of a backlight device according to the present invention.

Wherein the figures include the following reference numerals:

10. a splicing unit; 11. a first splicing unit; 111. a first plate body; 112. a second plate body; 113. a third plate body; 114. a fourth plate body; 12. a second splicing unit; 13. a first opening; 14. a second opening; 15. splicing the surfaces; 20. a reflective layer; 30. a clamping assembly; 31. clamping the bulges; 32. a card slot; 40. a positioning assembly; 41. positioning the projection; 42. a groove; 50. a light source; 60. a reflective structure.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

It is noted that, unless otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

In the present invention, unless otherwise specified, the use of directional words such as "upper and lower" is generally in reference to the orientation shown in the drawings, or to the vertical, perpendicular or gravitational orientation; likewise, for ease of understanding and description, "left and right" are generally to the left and right as shown in the drawings; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself, but the above directional terms are not intended to limit the present invention.

The inventor of the present application finds in research that the reflection structure adopted in the HUD backlight device in the related art is generally an integral structure, which is difficult when the reflection structure is provided with an internal reflection surface due to a certain depth, for example, when the reflection surface is plated, the phenomenon of uneven film coating effect exists, the light utilization rate of the reflection structure is reduced, and the light utilization rate of the backlight device is further influenced.

In order to solve the problem of uneven coating of the internal reflecting surface of the reflecting structure in the related art, the application provides a backlight device, a head-up display and a vehicle.

At least one embodiment of the present application provides a backlight device, as shown in fig. 1 to 5, the backlight device includes a reflective structure 60, the reflective structure 60 includes at least two splicing units 10, a reflective layer 20 is disposed on an inner surface of each splicing unit 10, and the at least two splicing units 10 are connected along a predetermined direction to form the reflective structure 60. Wherein each of the at least one splice units 10 includes at least two angularly disposed reflective layers 20.

For example, the angle may be any angle in the range of (0, 180); for example, the two reflective layers 20 may be connected by a rounded corner, and the included angle may be an external tangent angle corresponding to the rounded corner.

By applying the technical scheme of the embodiment of the application, the reflection structure 60 is an assembled structure, for example, the reflection structure 60 can be formed by at least two splicing units 10; when the inner surface of the reflection structure 60 needs to be coated, the inner surface of each splicing unit 10 is coated separately, and after the inner surface of each splicing unit 10 is coated, at least two splicing units 10 are connected along a preset direction to form the reflection structure 60. Because each splicing unit 10 is independently coated with a film, the coating film of the reflecting structure 60 is more uniform and consistent, the problem of uneven coating film of the reflecting surface inside the reflecting structure in the related technology is solved, and the light utilization rate of the reflecting structure 60 is improved.

For example, each tile 10 is a unitary structure, e.g., it cannot be broken down into sub-structures (e.g., sub-panels with reflective surfaces) that include reflective layers.

For example, the predetermined direction may be a counterclockwise direction or a clockwise direction around the extending direction S of the reflective structure 60, and the plurality of splicing elements 10 are connected end to form the reflective structure 60.

It should be noted that the reflective layer 20 may be disposed on the inner surface of the reflective structure 60 by plating or by pasting, and for convenience of explanation, the reflective layer 20 is disposed on the inner surface of the reflective structure 60 by plating.

For example, every two adjacent splicing units 10 are connected through a clamping assembly 30, the clamping assembly 30 comprises at least one clamping protrusion 31 and at least one clamping groove 32, and the clamping protrusion 31 extends into the clamping groove 32 and is matched with the clamping groove 32.

For example, one of the engaging protrusion 31 and the engaging groove 32 is disposed on one of the splice units 10 (e.g., integrally disposed or fixedly disposed) of each adjacent two splice units 10, and the other is disposed on the other splice unit 10 (e.g., integrally disposed or fixedly disposed) of each adjacent two splice units 10. Thus, the two adjacent splicing units 10 are easier and simpler to disassemble and assemble due to the arrangement, the disassembling and assembling difficulty is reduced, the structure of the clamping assembly 30 is simpler, the clamping assembly is easy to process and realize, and the overall processing cost and the processing difficulty of the reflection structure 60 are reduced.

For example, the clamping assembly 30 further includes a hook, the clamping groove 32 is disposed on the hook, and the hook overlaps the splicing unit 10, so that the clamping protrusion 31 extends into the clamping groove 32 and is engaged with the clamping groove 32 (for example, may be in a limit engagement), thereby realizing the assembly between two adjacent splicing units 10.

In some embodiments, as shown in fig. 1 to 3, the at least two splicing units 10 are a first splicing unit 11 and a second splicing unit 12, and the first splicing unit 11 and the second splicing unit 12 are connected to form the reflective structure 60. Thus, the number of the splicing units 10 is reduced, so that the reflection structure 60 is easier and simpler to disassemble and assemble, and the disassembling and assembling difficulty is reduced.

For example, the first splicing unit 11 and the second splicing unit 12 are connected by two clamping assemblies 30, the first splicing unit 11 has two first connecting edges, the second splicing unit 12 has two second connecting edges, and after each first connecting edge is in butt joint with the corresponding second connecting edge, the first connecting edge and the second connecting edge are connected by one clamping assembly 30. The clamping assembly 30 comprises two clamping protrusions 31 and two clamping grooves 32, the two clamping protrusions 31 and the two clamping grooves 32 are arranged in a one-to-one correspondence mode, connection stability between the first splicing unit 11 and the second splicing unit 12 is improved, and structural strength of the reflection structure 60 is improved.

It should be noted that the number of the clamping protrusions 31 is not limited to this, and can be adjusted according to the working condition and the use requirement. For example, the snap assembly 30 comprises one, or three, or four, or more snap projections 31.

The number of the catching grooves 32 is not limited to this, and may be the same as the number of the catching projections 31. For example, the card assembly 30 includes one, or three, or four, or more card slots 32.

It should be noted that the number of the clamping assemblies 30 is not limited to this, and can be adjusted according to the number of the splicing units 10. Optionally, the clamping assembly 30 is three, or four, or five, or more.

For example, the catching protrusion 31 is provided on the first splicing unit 11, and the catching groove 32 is provided on the second splicing unit 12. It should be noted that the arrangement positions of the engaging protrusion 31 and the engaging groove 32 are not limited to this, and may be adjusted according to the working condition and the use requirement. For example, the catching protrusion 31 is provided on the second splicing unit 12, and the catching groove 32 is provided on the first splicing unit 11.

It should be noted that the arrangement of the engaging protrusion 31 and the engaging groove 32 is not limited to this, and may be adjusted according to the working condition and the use requirement. For example, two first connecting edges of the first splicing unit 11 are respectively provided with a clamping protrusion 31 and a clamping groove 32, and two second connecting edges of the second splicing unit 12 are respectively provided with a clamping groove 32 and a clamping protrusion 31. The clamping protrusion 31 and the clamping groove 32 are correspondingly arranged and connected.

It should be noted that, the connection mode between two adjacent splicing units 10 is not limited to this, and may be adjusted according to the working condition and the use requirement. For example, each two adjacent splicing units 10 are connected by a fastener (for example, a screw fastener).

In some embodiments, as shown in fig. 1 and 3, a positioning assembly 40 is disposed between each two adjacent splicing units 10, the positioning assembly 40 includes a positioning protrusion 41 and a groove 42, and the positioning protrusion 41 extends into the groove 42 and is matched with the groove 42.

For example, one of the mating positioning protrusion 41 and the groove 42 is disposed on one of the splice units 10 of each adjacent two of the splice units 10, and the other is disposed on the other splice unit 10 of each adjacent two of the splice units 10. Like this, at the in-process that two splice unit 10 were assembled, fix a position the assembly of the two through locating component 40 to make the assembly between two splice unit 10 more accurate, promoted reflection configuration 60's assembly precision, also make reflection configuration 60's assembly easier, simple and convenient, reduced the assembly degree of difficulty.

For example, the positioning protrusion 41 is provided on the first splicing unit 11, and the groove 42 is provided on the second splicing unit 12; it should be noted that the arrangement positions of the positioning protrusion 41 and the groove 42 are not limited to this, and may be adjusted according to the working condition and the use requirement. For example, the positioning protrusion 41 is provided on the second splicing unit 12, and the groove 42 is provided on the first splicing unit 11.

In some embodiments, as shown in FIG. 1, a snap projection 31 is provided on an outer surface of the splice unit 10. Each splicing unit 10 has a splicing surface 15, the splicing surface 15 is arranged towards another splicing unit 10 adjacent to the splicing surface 15, and the positioning protrusion 41 is arranged on the splicing surface 15. Like this, at two at least splice unit 10 in-process of assembling, stretch into joint arch 31 earlier to recess 42 in and with the cooperation of recess 42 to realize the location of two at least splice unit 10 assembling process, be convenient for assemble two at least splice unit 10. Then, the clamping protrusion 31 extends into the clamping groove 32 and is in clamping fit with the clamping groove 32, so that the assembly of at least two splicing units 10 is realized.

For example, the positioning protrusion 41 and the groove 42 are engaged in a plug-in manner, so that the positioning protrusion and the groove can be positioned and aligned quickly when being spliced conveniently; the above-mentioned cooperation between joint protrusion 31 and draw-in groove 32 realizes the assembly between two at least splice units 10, avoids taking place to break away from each other and influencing backlight's normal use between the splice unit 10, and joint subassembly 30 and locating component 40 mutually support in order to reach better equipment effect.

In some embodiments, as shown in fig. 1 and 4, the first splicing unit 11 includes a first plate 111, a second plate 112, and a third plate 113 connected in sequence, the first plate 111 and the third plate 113 are disposed opposite to each other, and the second splicing unit 12 is disposed opposite to the second plate 112. For example, in this way, the arrangement enables the first splicing unit 11 and the second splicing unit 12 to be spliced to form a quadrangular frustum pyramid-shaped lamp cup, so that the reflection structure 60 can better reflect light entering the lamp cup, and the light utilization rate is improved. Meanwhile, the arrangement makes the structures of the first splicing unit 11 and the second splicing unit 12 simpler, assembly can be completed by one-time splicing, and installation errors caused by multiple times of assembly are avoided; and easy processing and realization, easy assembly has reduced reflective structure 60's processing cost and processing degree of difficulty. The first splicing unit 11 includes three reflecting layers 20 arranged at an included angle, and the second splicing unit 12 includes one reflecting layer 20.

In some embodiments, the first plate 111, the second plate 112, and the third plate 113 are integrally formed, so that the first splicing unit 11 is easier to process, and the processing cost of the first splicing unit 11 is reduced.

In some embodiments, as shown in fig. 2 and 3, the reflective structure 60 has a first opening 13, a reflective chamber including the reflective layer 20, and a second opening 14, the first opening 13 communicates with the second opening 14 through the reflective chamber, and the size of the reflective chamber gradually increases in a direction from the first opening 13 to the second opening 14. In this way, the orthographic projection of the first opening 13 on the second opening 14 is located in the second opening 14, and the first plate 111, the second plate 112, the third plate 113 and the second splicing unit 12 are all trapezoidal plates, so that the reflective structure 60 is a cover body with different opening sizes.

For example, the light source 50 is disposed at the first opening 13, and light emitted from the light source 50 enters the reflective chamber through the first opening 13, is reflected in the reflective chamber, and then exits through the second opening 14.

It should be noted that the size of the reflection chamber may be a cross-sectional area of a space surrounded by the plurality of reflection layers 20, and may be, for example, a cross-sectional area.

In the present embodiment, a cross section of the reflection chamber perpendicular to the direction of the first opening 13 to the second opening 14 includes one of a polygon, a circle, or an ellipse. Thus, the above arrangement makes the shape of the reflection structure 60 more versatile to meet different use requirements and conditions.

For example, the cross section of the reflection chamber is a quadrangle, so that the structure of the reflection structure 60 is simpler and is easy to process and implement.

For example, the first opening 13 is a first quadrangle, and the second opening 14 is a second quadrangle; for example, the projection of the diagonal intersection point a of the first quadrilateral on the second quadrilateral may or may not coincide with the diagonal intersection point B of the second quadrilateral.

At least one embodiment of the present application provides a backlight device, which includes a reflection structure 60, as shown in fig. 6 to 8, a first splicing unit 11 includes a first board 111 and a second board 112 connected to each other, a second splicing unit 12 includes a third board 113 and a fourth board 114 connected to each other, the first board 111 is connected to the fourth board 114, and the second board 112 is connected to the third board 113. Thus, the arrangement enables the first splicing unit 11 and the second splicing unit 12 to be spliced to form a quadrangular frustum pyramid shaped lamp cup, so that the reflection structure 60 can reflect light entering the lamp cup. Meanwhile, the arrangement makes the structures of the first splicing unit 11 and the second splicing unit 12 simpler, assembly can be completed by one-time splicing, and installation errors caused by multiple times of assembly are avoided; and the processing and the realization are easy, and the processing cost and the processing difficulty of the reflecting structure 60 are reduced. The first splicing unit 11 includes two reflective layers 20 arranged at an included angle, and the second splicing unit 12 includes two reflective layers 20 arranged at an included angle.

In some embodiments, each splice unit 10 is a unitary structure, so that the splice units 10 are easier to process, reducing the processing cost of the splice units 10.

In some embodiments, the first board 111 and the second board 112 are integrally formed, so that the first splicing unit 11 is easier to process, and the processing cost of the first splicing unit 11 is reduced. The first board 111 and the fourth board 114 are connected by a clip assembly 30, and the second board 112 and the third board 113 are connected by a clip assembly 30.

In some embodiments, the third plate 113 and the fourth plate 114 are integrally formed, so that the second splicing unit 12 is easier to process, and the processing cost of the second splicing unit 12 is reduced.

For example, the worker can disassemble and assemble the reflection structure 60 along the diagonal direction of the reflection structure 60, so that the disassembly and assembly modes of the reflection structure 60 are more diversified, and different use requirements and working conditions are met.

For example, the first opening 13 is a first quadrangle, the second opening 14 is a second quadrangle, and a predetermined distance is provided between a diagonal intersection point a of the first quadrangle and a diagonal intersection point B of the second quadrangle. Thus, the intersection point a of the diagonal line and the intersection point B of the diagonal line are staggered, so that the reflection structure 60 is an asymmetric structure, and different use requirements and working conditions of users are met.

For example, the first opening 13 is a first quadrangle, the second opening 14 is a second quadrangle, and a diagonal intersection point a of the first quadrangle coincides or substantially coincides with a diagonal intersection point B of the second quadrangle, so that the reflective structure 60 is a symmetrical structure to meet different use requirements and conditions of users.

At least one embodiment of the present application provides a backlight device, which includes a reflective structure 60, wherein the reflective structure 60 includes at least two splicing units 10, a reflective layer 20 is disposed on an inner surface of each splicing unit 10, and the at least two splicing units 10 are connected along a predetermined direction to form the reflective structure 60. The at least two splicing units 10 are a first splicing unit 11 and a second splicing unit 12, the first splicing unit and the second splicing unit are both of curved surface structures, and two end faces of each curved surface structure are located in the same plane.

For example, the reflecting structure 60 has a structure similar to a paraboloid, and the first splicing unit 11 and the second splicing unit 12 are two curved surfaces formed by decomposing along the rotation axis of the paraboloid; the parabolic reflector structure 60 can adjust the reflected light to be parallel or nearly parallel, and is suitable for different working conditions. The structure of the first splicing unit and the second splicing unit is simpler, the first splicing unit and the second splicing unit are easy to process and realize, and the processing cost and the processing difficulty of the reflection structure 60 are reduced.

Note that, the end face here refers to a splice end face of the first splice unit and the second splice unit.

For example, the cross section of the reflective structure 60 is circular or elliptical, wherein the cross section is perpendicular to the direction of the first opening 13 to the second opening 14. Thus, if the cross section of the reflection structure 60 is circular, the worker can disassemble and assemble the first splicing unit and the second splicing unit along the diameter direction of the reflection structure 60; if the cross section of reflecting structure 60 is oval, the staff can carry out the dismouting to first concatenation unit and second concatenation unit along reflecting structure 60's oval major axis direction to make reflecting structure 60's shape more diversified, in order to satisfy different user demand and operating mode.

As shown in fig. 9, the backlight device further includes a light source 50, and the reflective structure 60 is configured to reflect light emitted from the light source 50.

The present application also provides a head-up display (not shown) comprising the backlight device described above; for example, the head-up display further includes a curved mirror and a display screen, light emitted from the backlight device passes through the display screen to generate image light, the image light is transmitted to the curved mirror and reflected, the reflected light is emitted to an imaging window (e.g., a windshield of a vehicle) of the head-up display, and the reflected light forms an image for a user to view.

The application also provides a vehicle (not shown) comprising the backlight device provided by any one of the above embodiments. For example, the vehicle may be a land vehicle such as an automobile, a train, or an electric train, a water vehicle such as a ship, or an air vehicle such as an airplane.

From the above description, it can be seen that the above-mentioned embodiments of the present invention achieve the following technical effects:

the reflecting structure in the backlight device is an assembled structure, and when the inner surface of the reflecting structure needs to be coated, the inner surface of each splicing unit is coated independently. And after the inner surfaces of the splicing units are coated with films, connecting the at least two splicing units along a preset direction to form a reflecting structure. Because each splicing unit is independently coated with the film, the coating film of the reflecting structure is more uniform and consistent, the coating operation of the reflecting structure is easier and simpler, the problem of uneven coating film of the reflecting surface inside the reflecting structure in the backlight device in the related technology is solved, and the light utilization rate of the reflecting structure is improved.

It is obvious that the above described embodiments are only some of the embodiments of the present invention, and not all of them. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise, and it should be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of features, steps, operations, devices, components, and/or combinations thereof.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (12)

1. A backlight arrangement, characterized by a reflective structure (60), the reflective structure (60) comprising:

the reflective structure comprises at least two splicing units (10), wherein a reflective layer (20) is arranged on the inner surface of each splicing unit (10), and the at least two splicing units (10) are connected along a preset direction to form the reflective structure (60); wherein each of at least one of the splice units (10) comprises at least two angularly disposed reflective layers (20).

2. The backlight device according to claim 1,

the adjacent splicing units (10) are connected through a clamping assembly (30), the clamping assembly (30) comprises at least one clamping protrusion (31) and at least one clamping groove (32), and the clamping protrusion (31) is matched with the clamping groove (32); and/or the presence of a gas in the gas,

be provided with locating component (40) between adjacent concatenation unit (10), locating component (40) are including location arch (41) and recess (42), location arch (41) with recess (42) cooperation.

3. The backlight device according to claim 2, wherein a snap projection (31) is provided on an outer surface of the splicing unit (10); each splicing unit (10) is provided with a splicing surface (15), the splicing surface (15) is arranged towards the other splicing unit (10) adjacent to the splicing surface, and a positioning bulge (41) is arranged on the splicing surface (15).

4. Backlight device according to claim 1, characterized in that the at least two splicing units (10) are two splicing units (10).

5. Backlight according to any of claims 1 to 4, characterized in that the at least two splicing units (10) comprise a first splicing unit (11) and a second splicing unit (12);

the first splicing unit (11) comprises a first plate body (111), a second plate body (112) and a third plate body (113) which are sequentially connected, the first plate body (111) and the third plate body (113) are oppositely arranged, and the second splicing unit (12) and the second plate body (112) are oppositely arranged; alternatively, the first and second electrodes may be,

first concatenation unit (11) are including interconnect's first plate body (111) and second plate body (112), second concatenation unit (12) are including interconnect's third plate body (113) and fourth plate body (114), first plate body (111) with fourth plate body (114) are connected, second plate body (112) with third plate body (113) are connected.

6. A backlight according to any one of claims 1-4, characterised in that the reflective structure (60) has a first opening (13), a reflective chamber comprising the reflective layer (20), a second opening (14), the first opening (13) communicating with the second opening (14) through the reflective chamber, the size of the reflective chamber increasing in the direction from the first opening (13) to the second opening (14).

7. A backlight arrangement as claimed in claim 6, characterized in that a cross-section of the reflective chamber perpendicular to the direction of the first opening (13) to the second opening (14) comprises one of a polygon, a circle or an ellipse.

8. A backlight arrangement according to any one of claims 1 to 4 or 7, characterised in that each of the splicing units (10) is of unitary construction.

9. A backlight according to any one of claims 1 to 4 or 7, characterised in that the backlight further comprises: a light source (50), the reflective structure (60) being configured to reflect light emitted by the light source (50).

10. A backlight device, comprising a reflective structure (60), wherein the reflective structure (60) comprises at least two splicing units (10), a reflective layer (20) is disposed on an inner surface of each splicing unit (10), and the at least two splicing units (10) are connected along a predetermined direction to form the reflective structure (60); the at least two splicing units (10) are a first splicing unit (11) and a second splicing unit (12), the first splicing unit (11) and the second splicing unit (12) are both curved surface structures, and two end faces of each curved surface structure are located in the same plane.

11. A head-up display comprising a backlight as claimed in any one of claims 1 to 10.

12. A vehicle comprising the heads-up display of claim 11.

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