CN220154724U - Backlight device, head-up display and vehicle - Google Patents

Abstract

The utility model provides a backlight device, a head-up display and a vehicle. The backlight device provided by the utility model comprises a backlight module, an optical element, a positioning piece and an adjusting component, wherein the optical element is arranged on the light emitting side of the backlight module, the positioning piece is arranged around the circumferential edge of the optical element, the adjusting component comprises an adjusting seat and an adjusting piece, the adjusting seat is connected with the backlight module, the adjusting piece is movably arranged on the adjusting seat, and the adjusting piece is abutted with the side wall of the positioning piece so as to adjust the relative position of the optical element and the backlight module, so that the position offset caused by the possible size error generated in the production process of parts is eliminated, the accuracy of the installation position of the optical element is ensured, and the image display quality of the backlight device after being applied to a head-up display is further improved.

Description

Backlight device, head-up display and vehicle

Technical Field

The present utility model relates to the field of vehicle display technologies, and in particular, to a backlight device, a head-up display, and a vehicle.

Background

Backlighting systems in Head Up Displays (HUDs) are commonly used to illuminate image information including gauges, navigation, etc., so that the image information can be projected near the driver's line of sight through an imaging light path, avoiding frequent low Head viewing of the dashboard while driving. The virtual image output from the imaging light path or system and projected in front of the automobile windshield also needs to meet the brightness uniformity perceived by human eyes, so that glare is avoided, and the driving safety is ensured.

In the related art, a backlight device in a head-up display comprises a light source and an optical display module, wherein the light source is used for generating image information according to acquired automobile information, and the image information is projected to an automobile windshield through the optical display module for display.

However, the optical element (such as a grating) of the current optical display module may be shifted when mounted on the light emitting side of the light source, resulting in poor image effect of the head-up display.

Disclosure of Invention

The embodiment of the utility model provides a backlight device, a head-up display and a vehicle, which are used for solving the technical problem that the image effect of projection display of the head-up display is poor because the optical element of the current optical display module is easy to generate position deviation when being arranged on the light emitting side of a light source.

The utility model provides a backlight device, which comprises a backlight module, an optical element, a positioning piece and an adjusting component, wherein the optical element is arranged on the light emitting side of the backlight module, and the positioning piece is arranged around the circumferential edge of the optical element.

The adjusting component comprises an adjusting seat and an adjusting piece, the adjusting seat is connected with the backlight module, the adjusting piece is movably arranged on the adjusting seat, and the adjusting piece is abutted with the side wall of the positioning piece so as to adjust the relative position of the optical element and the backlight module.

According to the backlight device provided by the embodiment of the utility model, the relative position of the optical element relative to the backlight module is adjusted by arranging the adjusting component when the optical element is installed, so that the position offset caused by the possible size error of parts in the production process is eliminated, the accuracy of the installation position of the optical element is ensured, and the image display quality of the backlight device after being applied to a head-up display is further improved.

As an alternative embodiment, the adjusting member may comprise a first adjusting member and a second adjusting member, which are located on different sides of the optical element, respectively; the first adjustment member is configured to move in a first direction relative to the adjustment seat and the second adjustment member is configured to move in a second direction relative to the adjustment seat.

The position of the optical element can be adjusted from different directions through different adjusting pieces, so that the position accuracy of the optical element in different directions is ensured.

As an alternative embodiment, the adjusting seat may include a first adjusting seat and a second adjusting seat, the first adjusting seat may be connected to the backlight module, and the second adjusting seat is connected to the first adjusting seat; the first adjusting seat is provided with a moving cavity, and the first adjusting piece can be movably arranged in the moving cavity; the second adjusting seat is provided with a limiting hole, and the second adjusting piece is at least partially movably inserted in the limiting hole.

The first adjusting piece and the second adjusting piece can be respectively and independently arranged on different sides of the optical element, and the convenience of position adjustment of the optical element in different directions is improved.

As an alternative embodiment, the adjustment assembly may further comprise a first threaded connection and a second threaded connection; the first threaded connecting piece can be screwed on the first adjusting seat, and the first threaded connecting piece is abutted against one side of the first adjusting piece, which is away from the optical element; the second threaded connecting piece can be screwed on the second adjusting seat, and the second threaded connecting piece is abutted against one side of the second adjusting piece, which is away from the optical element.

So set up, can adjust the position of first regulating part or second regulating part through the screw thread connecting piece, improve the convenience of operation and adjust the controllability of stroke.

As an alternative embodiment, the adjusting assembly may further comprise an elastic member connected to the adjusting seat; the elastic piece can include first elastic knot and second elastic knot, and first elastic knot can the butt in the setting element one side that deviates from first regulating part, and the second elastic knot can the butt in the setting element one side that deviates from second regulating part.

By the arrangement, the relative positions of the optical elements are fixed through the elasticity of the elastic piece, and the installation reliability of the optical elements is improved.

As an optional implementation manner, the elastic member may further include a third elastic buckle, where the third elastic buckle abuts against a side of the positioning member facing away from the backlight module.

By the arrangement, the positioning piece can be ensured to press the optical element, and the optical element is prevented from shaking back and forth in the light emitting direction.

As an alternative embodiment, the backlight device may further include a housing having a receiving cavity, and the backlight module is connected to an inner wall of the receiving cavity; the bottom wall of the housing may be provided with an opening, and a cover plate covering the opening, and either one of the first regulating member and the second regulating member may be located on a side of the optical element facing the opening.

After the backlight module and the optical element are installed in the accommodating cavity, the position of the optical element relative to the backlight module can be adjusted by opening the cover plate on the opening.

As an alternative embodiment, the optical element may be any one of a grating and a liquid crystal display.

The arrangement can select the adjusting structure to install and adjust different optical elements according to the requirements of actual application scenes.

In a second aspect, the present utility model provides a head-up display, where the head-up display includes the backlight device in the above technical solution.

In a third aspect, the present utility model provides a vehicle, which includes the head-up display in the above technical solution.

The utility model provides a backlight device, a head-up display and a vehicle, wherein the backlight device comprises a backlight module, an optical element, a positioning piece and an adjusting component, the optical element is arranged on the light emitting side of the backlight module, the positioning piece is arranged around the circumferential edge of the optical element, the adjusting component comprises an adjusting seat and an adjusting piece, the adjusting seat is connected with the backlight module, the adjusting piece is movably arranged on the adjusting seat, and the adjusting piece is abutted to the side wall of the positioning piece so as to adjust the relative position of the optical element and the backlight module, so that the position offset caused by the possible size error generated in the production process of parts is eliminated, the accuracy of the installation position of the optical element is ensured, and the image display quality of the backlight device after being applied to the head-up display is further improved.

In addition to the technical problems, technical features constituting the technical solutions, and beneficial effects caused by the technical features of the technical solutions described above, the backlight device, the head-up display, and the vehicle provided by the present utility model, other technical features included in the technical solutions, and beneficial effects caused by the technical features, will be described in further detail in the detailed description.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a backlight device according to an embodiment of the present utility model;

FIG. 2 is an exploded view of a backlight device according to an embodiment of the present utility model;

fig. 3 is a schematic diagram of an installation structure of an optical element in a backlight device according to an embodiment of the utility model;

fig. 4 is a schematic diagram of a second mounting structure of an optical element in the backlight device according to the embodiment of the utility model;

FIG. 5 is a cross-sectional view taken along the direction A-A in FIG. 4;

fig. 6 is a schematic diagram III of an installation structure of an optical element in a backlight device according to an embodiment of the present utility model;

FIG. 7 is a cross-sectional view taken in the direction B-B of FIG. 6;

fig. 8 is a schematic diagram of a bottom opening structure of a backlight device according to an embodiment of the utility model.

Reference numerals illustrate:

10-a backlight device;

100-a backlight module;

200-an optical element;

300-positioning piece;

400-an adjustment assembly; 410-adjusting the seat; 411-a first adjustment seat; 4111-moving the cavity; 412-a second adjustment seat; 4121-a limiting aperture; 420-an adjusting member; 421-first adjuster; 422-a second adjustment member; 431-first threaded connection; 432-a second threaded connection; 440-elastic member; 441-a first elastic clasp; 442-a second elastic clasp; 443-a third elastic buckle;

500-a housing; 501-a receiving cavity; 502-opening; 510-cover plate.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model.

First, it should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present utility model, and are not intended to limit the scope of the present utility model. Those skilled in the art can adapt it as desired to suit a particular application.

Further, it should be noted that, in the description of the present utility model, terms such as "upper", "lower", "left", "right", "front", "rear", "inner", "outer", and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or components must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Furthermore, it should be noted that, in the description of the present utility model, unless explicitly specified and limited otherwise, the terms "connected," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; there may be communication between the interiors of the two members. The specific meaning of the above terms in the present utility model can be understood by those skilled in the art according to the specific circumstances.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Automotive Head Up Displays (HUDs) are increasingly used in the automotive field. Through installing HUD equipment on the car, HUD technique can be with information display such as speed of a motor vehicle, navigation, external intelligent device in the windscreen area, and the user can observe information such as speed of a motor vehicle, speed limit instruction, driving route pattern, has improved user's use experience and has felt, has avoided the driver to look over driving information with low heads, has strengthened driving safety. The backlight device in the head-up display comprises a light source and an optical display module, wherein the light source is used for generating image information according to the acquired automobile information, and the image information is projected to the automobile windshield through the optical display module for display.

However, due to the processing dimensional errors of the parts, optical elements such as gratings and Liquid Crystal Display (LCD) of the optical display module may generate position offset when being mounted on the light emitting side of the light source module, so that the optical path of the head-up display is affected, resulting in poor image effect of projection display of the head-up display.

In view of the above problems, the present utility model provides a backlight device, a head-up display and a vehicle, and by means of the design of the mounting structure of optical elements such as gratings and liquid crystal display in the backlight device, the relative positions of the optical elements can be adjusted when the optical elements are mounted on the light emitting side of the backlight module, so that the influence of possible dimensional errors generated in the production process of parts is eliminated, the mounting position deviation is generated when the optical elements are placed, and the image display quality of the backlight device after the backlight device is applied to the head-up display is improved.

Fig. 1 is a schematic structural diagram of a backlight device according to an embodiment of the present utility model, fig. 2 is an exploded view of the backlight device according to the embodiment of the present utility model, and fig. 3 is a schematic structural diagram of an optical element in the backlight device according to the embodiment of the present utility model.

As shown in fig. 1 to 3, the embodiment of the utility model provides a backlight device 10, wherein the backlight device 10 includes a backlight module 100, an optical element 200, a positioning member 300 and an adjusting assembly 400, the optical element 200 is disposed on a light emitting side of the backlight module 100, and the positioning member 300 is disposed around a circumferential edge of the optical element 200.

The backlight module 100 is configured to generate light and form a desired output image through the optical element 200, the positioning element 300 is configured to limit and position the installation of the optical element 200, the position of the optical element 200 relative to the positioning element 300 is relatively fixed, and the adjusting assembly 400 is configured to adjust the position of the positioning element 300, thereby adjusting the position of the optical element 200 relative to the backlight module 100.

In some embodiments, the adjusting assembly 400 includes an adjusting seat 410 and an adjusting member 420, the adjusting seat 410 is connected with the backlight module 100, the adjusting member 420 is movably disposed on the adjusting seat 410, and the adjusting member 420 abuts against a sidewall of the positioning member 300 to adjust a relative position of the optical element 200 and the backlight module 100.

It can be understood that the position of the adjusting seat 410 relative to the backlight module 100 is relatively fixed, the position of the adjusting member 420 relative to the adjusting seat 410 can be moved, and the adjusting member 420 pushes the positioning member 300 to move during the movement of the adjusting member 420 relative to the adjusting seat 410, so as to adjust the position of the optical element 200, wherein the movement direction of the adjusting member 420 corresponds to the movement direction of the optical element 200.

It should be noted that, in the backlight device 10 provided in the embodiment of the present utility model, when the optical element 200 is mounted on the backlight module 100, the adjusting assembly 400 may adjust the position of the optical element 200, and after the adjustment is completed, the adjusting assembly 400 may fix the position of the optical element 200 at the adjusted position, so as to eliminate the position offset caused by the dimensional error possibly generated in the production process of the parts, ensure the accuracy of the mounting position of the optical element 200, and further improve the image display quality of the backlight device 10 after being applied to the head-up display.

The specific manner and direction of adjustment of the optical element 200 by the adjustment member 420 will be described in detail first.

Fig. 4 is a schematic diagram of a second installation structure of an optical element in the backlight device according to the embodiment of the utility model, and fig. 5 is a cross-sectional view in a direction A-A in fig. 4.

Referring to fig. 4 and 5, and referring to fig. 1 to 3, in one possible implementation, the adjusting member 420 may include a first adjusting member 421 and a second adjusting member 422, where the first adjusting member 421 and the second adjusting member 422 are located on different sides of the optical element 200, respectively, the first adjusting member 421 is configured to move in a first direction relative to the adjusting seat 410, and the second adjusting member 422 is configured to move in a second direction relative to the adjusting seat 410, so that the position of the optical element 200 can be adjusted from different directions by the different adjusting members 420, thereby ensuring the positional accuracy of the optical element 200 in different directions.

It can be understood that the optical element 200 may be attached to the light emitting side of the backlight module 100, and the adjusting member 420 mainly adjusts the position of the plane where the optical element 200 is located, where the optical element 200 may be square, and the optical element 200 includes an upper side, a lower side, a left side and a right side, and the first adjusting member 421 and the second adjusting member 422 may respectively adjust the position of the optical element 200 along the left-right direction thereof and the position along the up-down direction thereof.

For example, the first adjustment member 421 may be disposed at the left side or the right side of the optical element 200, and the first direction corresponds to the direction in which the optical element 200 moves left and right, and when the first adjustment member 421 moves in the first direction, the optical element 200 may move in the same direction as the first adjustment member 421, thereby adjusting the position of the optical element 200 in the left and right direction.

For example, the second regulating member 422 may be disposed at an upper side or a lower side of the optical element 200 in a second direction corresponding to a direction in which the optical element 200 moves up and down, and when the second regulating member 422 moves in the second direction, the optical element 200 may move in the same direction as the second regulating member 422, thereby regulating a position of the optical element 200 in the up and down direction.

It should be noted that, the first direction corresponds to the X direction in fig. 3, the second direction corresponds to the Y direction in fig. 3, the first direction may be perpendicular to the second direction, the movement of the first adjusting member 421 relative to the adjusting seat 410 and the movement of the second adjusting member 422 relative to the adjusting seat 410 are relatively independent, and when the optical element 200 is assembled, the positions of the first adjusting member 421 and the second adjusting member 422 may be respectively adjusted, so as to ensure the accuracy of the installation position of the optical element 200.

In some embodiments, the adjusting seat 410 may include a first adjusting seat 411 and a second adjusting seat 412, the first adjusting seat 411 may be connected to the backlight module 100, the second adjusting seat 412 is connected to the first adjusting seat 411, the first adjusting seat 411 is provided with a moving cavity 4111, the first adjusting member 421 may be movably disposed in the moving cavity 4111, the second adjusting seat 412 is provided with a limiting hole 4121, and the second adjusting member 422 is at least partially movably inserted into the limiting hole 4121.

It can be appreciated that the first adjusting seat 411 and the second adjusting member 422 seat can be manufactured and processed independently, and the two seats can be connected by fasteners such as bolts, thereby improving the processing convenience. The moving cavity 4111 may perform a limiting and guiding function on the movement of the first adjusting member 421, and the limiting hole 4121 may perform a guiding function on the movement of the second adjusting member 422, so that the first adjusting member 421 and the second adjusting member 422 may be independently installed at different sides of the optical element 200, respectively, to improve convenience in adjusting the position of the optical element 200 in different directions.

Illustratively, the first adjustment member 421 may have a shape that matches the shape of the moving cavity 4111, with the moving cavity 4111 being open toward the sidewall of the positioning member 300 such that the first adjustment member 421 may at least partially protrude from the moving cavity 4111 and abut the sidewall of the positioning member 300.

Exemplary, the second adjusting seat 412 may be provided with a guiding rib extending along the second direction, the second adjusting member 422 may be provided with a guiding post, the guiding post may be inserted into the limiting hole 4121, the guiding post moves along the axial direction of the limiting hole 4121 when the second adjusting member 422 moves relative to the second adjusting post, and the guiding rib may guide the movement of the second adjusting member 422

It should be noted that, the first adjusting member 421 and the second adjusting member 422 may have a block structure, so that the side walls of the first adjusting member 421 and the second adjusting member 422 and the positioning member 300 have a contact area with a sufficient size, and further the position adjusting process of the optical element 200 has a sufficient stability.

With continued reference to fig. 1-5, in some embodiments, the adjustment assembly 400 may further include a first threaded connection 431 and a second threaded connection 432; the first threaded connection 431 may be screwed to the first adjusting seat 411, and the first threaded connection 431 abuts against a side of the first adjusting member 421 facing away from the optical element 200, the second threaded connection 432 may be screwed to the second adjusting seat 412, and the second threaded connection 432 abuts against a side of the second adjusting member 422 facing away from the optical element 200, so that the position of the first adjusting member 421 or the second adjusting member 422 may be adjusted by screwing the threaded connection.

It is understood that the axial direction of the first screw 431 extends along the first direction, and when the first screw 431 is rotated, the first adjusting member 421 is pushed to move along the first direction. The second screw 432 has an axial direction extending in the second direction, and when the second screw 432 is rotated, the second adjusting member 422 is pushed to move in the second direction, thereby improving convenience of operation and controllability of an adjusting stroke.

For example, two first screw connectors 431 may be provided, and a threaded hole may be formed on a wall of the moving cavity 4111, two first screw connectors 431 may be disposed on the wall of the moving cavity 4111 at a parallel interval, and the two first screw connectors 431 may respectively rotate for the same stroke to ensure the smoothness of the movement of the first adjusting member 421. In addition, there may be two second threaded connectors 432, and the two second threaded connectors 432 may be distributed and adjusted on the second adjusting seat 412 in a similar manner to the first threaded connector 431 described above, which will not be described herein.

It should be noted that, when the first threaded connection 431 rotates toward the direction of the positioning member 300, and when the second threaded connection 432 rotates toward the direction of the positioning member 300, the first threaded connection 431 and the second threaded connection 432 can respectively drive the light element to move by pushing the first adjusting member 421 and the second adjusting member 422, and when the first threaded connection 431 and the second threaded connection 432 rotate toward the direction away from the positioning member 300, the light element can be reset by elasticity. This will be described in detail below.

Fig. 6 is a schematic diagram of an installation structure of an optical element in a backlight device according to an embodiment of the present utility model, and fig. 7 is a cross-sectional view in a direction B-B in fig. 6.

Referring to fig. 1 to 7, in one possible implementation manner, the adjusting assembly 400 may further include an elastic member 440, the elastic member 440 is connected to the adjusting seat 410, the elastic member 440 may include a first elastic buckle 441 and a second elastic buckle 442, the first elastic buckle 441 may abut against a side of the positioning member 300 facing away from the first adjusting member 421, and the second elastic buckle 442 may abut against a side of the positioning member 300 facing away from the second adjusting member 422.

It will be appreciated that the first elastic buckle 441 may apply an elastic force to the positioning member 300 toward the first adjustment member 421 such that the positioning member 300 is clamped between the first elastic buckle 441 and the first adjustment member 421 in the first direction, and correspondingly, the second elastic buckle 442 may apply an elastic force to the positioning member 300 toward the second adjustment member 422 such that the positioning member 300 is clamped by the second elastic buckle 442 and the second adjustment member 422 in the second direction, so that the reliability of the installation of the optical element 200 may be improved.

In addition, when the first adjusting member 421 or the second adjusting member 422 moves in a direction away from the positioning member 300, the elastic force of the first elastic buckle 441 and the second elastic buckle 442 can force the positioning member 300 to move in the corresponding direction, so that the positioning member 300 is tightly attached to the first adjusting member 421 and the second adjusting member 422.

The first elastic buckle 441 and the second elastic buckle 442 are used to fix the position of the optical element 200 in the adjustment plane, and the elastic member 440 may also fix the position of the optical element 200 in the light emitting direction, which will be described below.

In a possible implementation manner, the elastic member 440 may further include a third elastic buckle 443, where the third elastic buckle 443 abuts against a side of the positioning member 300 facing away from the backlight module 100, so as to ensure that the positioning member 300 compresses the optical element 200, and prevent the optical element 200 from shaking back and forth in the light emitting direction.

It is understood that the third elastic buckle 443 can be abutted against a position of the side of the positioning member 300 facing away from the backlight module 100, which is close to the edge of the positioning member 300, and the elastic force generated by the third elastic buckle 443 faces the backlight module 100, so that the light element is tightly attached to the backlight module 100.

For example, the positioning member 300 may have a square frame structure, and the upper, lower, left and right sides of the positioning member 300 respectively abut against the upper, lower, left and right sides of the optical element 200. The number of the third elastic buckles 443 may be two, and the two third elastic buckles 443 may be respectively abutted on a position near the upper side of the positioning member 300 and a position near the lower side of the positioning member 300, thereby improving the reliability of fixing the optical element 200.

Fig. 8 is a schematic diagram of a bottom opening structure of a backlight device according to an embodiment of the utility model.

Referring to fig. 8 in combination with fig. 1 and fig. 2, in some embodiments, the backlight device 10 may further include a housing 500, the housing 500 has a receiving cavity 501, the backlight module 100 is connected to an inner wall of the receiving cavity 501, a bottom wall of the housing 500 may be provided with an opening 502 and a cover plate 510 covering the opening 502, any one of the first adjusting member 421 and the second adjusting member 422 may be located on a side of the optical element 200 facing the opening 502, and after the backlight module 100 and the optical element 200 are installed in the receiving cavity 501, the position of the optical element 200 relative to the backlight module 100 may be adjusted by opening the cover plate 510 on the opening 502.

It will be appreciated that the underside of the optical element 200 and the positioning member 300 may be oriented toward the bottom wall of the housing 500 and the second adjustment member 422 may be disposed on the underside of the positioning member 300. During the assembly of the backlight device 10, the position of the optical element 200 in the first direction and the second direction may be adjusted once by adjusting the positions of the first and second adjusting members 421 and 422 when the optical element 200 is mounted to the backlight module 100, and the position of the second adjusting member 422 may be adjusted from the opening 502 by opening the cover plate 510 when the backlight module 100 and the optical element 200 are integrally mounted to the housing 500, thereby performing the second adjustment of the position of the optical element 200 in the second direction.

It should be noted that, the optical element 200 may be any one of a grating and a liquid crystal display, so that the above adjusting structure may be selected to perform installation adjustment on different optical elements 200 according to the requirements of the actual application scenario.

For example, the optical element 200 may be a grating, the liquid crystal display may be disposed on the light emitting side of the backlight module 100, and the grating may be attached to the light emitting side of the liquid crystal display, and further, the position of the liquid crystal display relative to the backlight module 100 is relatively fixed, and the position of the grating relative to the liquid crystal display and the backlight module 100 may be adjusted by the adjusting component 400.

The backlight device provided by the embodiment of the utility model comprises a backlight module, an optical element, a positioning piece and an adjusting component, wherein the optical element is arranged on the light emitting side of the backlight module, the positioning piece is arranged around the circumferential edge of the optical element, the adjusting component comprises an adjusting seat and an adjusting piece, the adjusting seat is connected with the backlight module, the adjusting piece is movably arranged on the adjusting seat, and the adjusting piece is abutted with the side wall of the positioning piece so as to adjust the relative position of the optical element and the backlight module, thereby eliminating the position offset caused by the possible size error generated in the production process of parts, ensuring the accuracy of the installation position of the optical element, and further improving the image display quality of the backlight device after being applied to a head-up display.

The utility model also provides a head-up display, which comprises the backlight device in the technical scheme. The head-up display provided by the utility model has all technical schemes and technical effects of the backlight device, and is not described herein.

The utility model also provides a vehicle which comprises the head-up display in the technical scheme. The vehicle provided by the utility model can have all the technical schemes and technical effects of the backlight device, and are not repeated here.

It should be noted that, the vehicle may be an automobile, a motorcycle, etc., and the head-up display may produce an image from information obtained from the automobile and project the image onto a windshield of the automobile, and the vehicle to which the head-up display may be mounted may include, but is not limited to, a fuel-fired vehicle, a hybrid vehicle, a pure electric vehicle, etc., which is not particularly limited in the embodiment of the present utility model.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.

Claims (10)

1. The backlight device is characterized by comprising a backlight module, an optical element, a positioning piece and an adjusting component, wherein the optical element is arranged on the light emitting side of the backlight module, and the positioning piece is arranged around the circumferential edge of the optical element;

the adjusting component comprises an adjusting seat and an adjusting piece, the adjusting seat is connected with the backlight module, the adjusting piece is movably arranged on the adjusting seat, and the adjusting piece is abutted to the side wall of the positioning piece so as to adjust the relative position of the optical element and the backlight module.

2. A backlight as claimed in claim 1, wherein the adjustment member comprises a first adjustment member and a second adjustment member, the first adjustment member and the second adjustment member being located on different sides of the optical element, respectively; the first adjustment member is configured to move in a first direction relative to the adjustment seat and the second adjustment member is configured to move in a second direction relative to the adjustment seat.

3. The backlight device of claim 2, wherein the adjustment base comprises a first adjustment base and a second adjustment base, the first adjustment base is connected with the backlight module, and the second adjustment base is connected with the first adjustment base; the first adjusting seat is provided with a moving cavity, and the first adjusting piece is movably arranged in the moving cavity; the second adjusting seat is provided with a limiting hole, and the second adjusting piece is at least partially movably inserted in the limiting hole.

4. A backlight as claimed in claim 3, wherein the adjustment assembly further comprises a first threaded connector and a second threaded connector; the first threaded connecting piece is screwed on the first adjusting seat in a threaded manner, and the first threaded connecting piece is abutted against one side, away from the optical element, of the first adjusting piece; the second threaded connecting piece is in threaded connection with the second adjusting seat, and the second threaded connecting piece is in butt joint with one side of the second adjusting piece, which faces away from the optical element.

5. A backlight device according to any one of claims 2 to 4, wherein the adjustment assembly further comprises an elastic member connected to the adjustment base; the elastic piece comprises a first elastic buckle and a second elastic buckle, the first elastic buckle is abutted to one side, deviating from the first adjusting piece, of the positioning piece, and the second elastic buckle is abutted to one side, deviating from the second adjusting piece, of the positioning piece.

6. The backlight device of claim 5, wherein the elastic member further comprises a third elastic buckle, and the third elastic buckle abuts against one side of the positioning member facing away from the backlight module.

7. A backlight device according to any of claims 2-4, further comprising a housing having a receiving cavity, the backlight module being connected to an inner wall of the receiving cavity; the bottom wall of the shell is provided with an opening and a cover plate covering the opening, and any one of the first adjusting piece and the second adjusting piece is positioned on one side of the optical element facing the opening.

8. A backlight as claimed in any one of claims 1 to 4, wherein the optical element is any one of a grating and a liquid crystal display.

9. A head-up display comprising a backlight device according to any of claims 1-8.

10. A vehicle comprising the heads-up display of claim 9.