Backlight lamp panel of head-up display, head-up display and vehicle

Abstract

The invention relates to the technical field of head-up displays, in particular to a backlight lamp panel of a head-up display, the head-up display and a vehicle. The backlight lamp panel comprises a mounting substrate, a plurality of backlight lamps and a driving plate, the backlight lamps and the driving plate are arranged on the mounting substrate, the driving plate or the mounting substrate is provided with a wire, the plurality of backlight lamps are connected with the wire, and the driving plate is connected with the wire. And the brightness of at least part of the backlight lamps is independently controlled through the driving plate. According to the backlight lamp panel of the head-up display disclosed by the embodiment of the invention, the driving board or the mounting substrate is used for independent wiring, regional control of multiple backlight lamps is realized, so that intelligent adjustment of backlight of the head-up display is realized, power consumption is reduced as much as possible under the condition that the brightness requirement of each display content in a virtual image is met, heat received by a display screen is further reduced, and the display effect of the head-up display is improved. Therefore, the display screen is prevented from being damaged due to over-high temperature.

Description

Technical Field

[0001] The present disclosure relates to the technical field of head-up displays, and in particular to a backlight panel of a head-up display, a head-up display, and a vehicle. Background Art

[0002] HUD (head up display) is also called a head-up display. By projecting the light emitted by the HUD image source onto the imaging window (rear-mounted imaging board or vehicle windshield, etc.), the user can directly see the image without lowering his head, thereby improving the user experience. For example, in some cases, the driver can avoid being distracted by looking down at the dashboard while driving, thereby improving the driving safety factor and also providing a better driving experience.

[0003] However, since the display screen of the HUD (such as a TFT screen) is generally small in size, if a large number of LEDs are arranged, it may cause the problem of normal routing of the LEDs, and it may also cause greater pressure on the heat dissipation design. Summary of the invention

[0004] In order to solve the above technical problems or at least partially solve the above technical problems, the present disclosure provides a backlight panel of a head-up display, a head-up display and a vehicle.

[0005] The present disclosure provides a backlight lamp board for a head-up display, comprising a mounting substrate, a plurality of backlight lamps and a driving board, wherein the backlight lamps are mounted on the mounting substrate, the driving board is electrically connected to the backlight lamps, the driving board or the mounting substrate is provided with a conductive circuit, and the plurality of backlight lamps are respectively connected to the corresponding conductive circuits so as to independently control the brightness of at least part of the backlight lamps through the driving board.

[0006] Optionally, the backlight lamp board further includes a driving element, wherein the driving element is disposed on the driving board, and the driving element is connected to the conductive circuit to drive the backlight to turn on and off.

[0007] Optionally, the conductive circuit is arranged on the driving board, the driving board is located above the mounting substrate, the driving board leads out a connecting line, one end of the connecting line is connected to the conductive circuit, and the other end is connected to the mounting substrate.

[0008] Optionally, the driving board is connected to the mounting substrate via an electrical connection point; and / or,

[0009] The backlight is connected to the mounting substrate via an electrical connection point;

[0010] And / or, the mounting substrate includes a base and a high thermal conductivity insulating layer.

[0011] Optionally, each of the backlights is overlapped on the mounting substrate via two soldering pads, the soldering pads are connected to the electrical connection points, and the driving board is overlapped on the electrical connection points.

[0012] Optionally, the driving board includes a core board and at least two insulating layers, the core board and the insulating layers are alternately arranged, and the conductive circuit is arranged on the core board.

[0013] Optionally, the driving board includes an insulating substrate, the insulating substrate is provided with a wiring area, a wiring channel is opened in the wiring area, and the wiring channel is filled with a conductor to form the conductive circuit.

[0014] Optionally, the backlight is mounted on the mounting substrate, and the mounting substrate is pressed, hot-riveted or welded to the driving board at the wiring area of ​​the driving board.

[0015] Optionally, the driving element is attached to the driving plate.

[0016] Optionally, there are multiple conductive circuits, and there is a one-to-one correspondence between the multiple conductive circuits and the multiple backlights, so as to independently control the brightness of the multiple backlights.

[0017] Optionally, the conductive circuit is disposed on the mounting substrate, the backlight is disposed on the mounting substrate and point-connected to the conductive circuit, the driving element is attached to the driving board, and the driving board and the mounting substrate are fixedly connected via a connecting pad.

[0018] Furthermore, the present disclosure also provides a head-up display, comprising a backlight panel of any of the above-mentioned head-up displays.

[0019] Furthermore, the present disclosure also provides a means of transportation, comprising the above-mentioned head-up display.

[0020] Compared with the prior art, the technical solution provided by the embodiments of the present disclosure has the following advantages:

[0021] The backlight lamp board of the head-up display provided in the embodiment of the present disclosure includes a mounting substrate, a backlight lamp and a driving board. A conductive circuit is arranged on the driving board or the mounting substrate, and a plurality of backlight lamps are respectively connected to the corresponding conductive circuits, so that the brightness of at least part of the backlight lamps can be independently controlled through the driving board. The backlight lamp board of the head-up display in the embodiment of the present disclosure uses a separate wiring of the driving board or the mounting substrate to realize regional control of multiple backlight lamps, thereby realizing intelligent adjustment of the backlight of the head-up display, and minimizing power consumption while meeting the brightness requirements of each display content in the virtual image, thereby reducing the heat received by the display screen, thereby avoiding damage to the display screen due to excessive temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0024] Figure 1 It is a schematic diagram of the structure of the backlight lamp board described in some embodiments of the present disclosure;

[0025] Figure 2 It is a schematic diagram of the structure of the driving board described in other embodiments of the present disclosure;

[0026] Figure 3 It is a schematic diagram of the structure of the mounting substrate according to other embodiments of the present disclosure;

[0027] Figure 4 It is a schematic diagram of the structure of the backlight lamp board described in some other embodiments of the present disclosure;

[0028] Figure 5 A schematic diagram of the structure of a head-up display provided in an embodiment of the present disclosure.

[0029] Among them, 1. mounting substrate; 2. solder pad; 3. backlight; 4. driver board; 5. electrical connection point; 6. driver element; 10. image source; 20. reflective imaging part; 30. eye box area; 40. imaging position; 50. exit port; 60. plane reflector; 70. curved reflector; 401. routing area; 402. routing channel; 601. connector; 602. chip. DETAILED DESCRIPTION

[0030] In order to more clearly understand the above-mentioned objectives, features and advantages of the present disclosure, the scheme of the present disclosure will be further described below. It should be noted that the embodiments of the present disclosure and the features in the embodiments can be combined with each other without conflict.

[0031] In the following description, many specific details are set forth to facilitate a full understanding of the present disclosure, but the present disclosure may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present disclosure, rather than all of the embodiments.

[0032] The inventor of the present disclosure has found that in order to solve at least one of the problems of insufficient brightness of the existing HUD, excessive power consumption due to meeting the brightness requirements, and damage to the liquid crystal display due to excessive temperature in the HUD, the image source of the HUD is provided with a backlight control capability, that is, when multiple backlights are provided, the backlights can be regionally controlled. For example, the image source of the head-up display includes a backlight unit and a display screen, wherein the backlight unit at least includes a backlight lamp board. For example, the backlight lamp board includes a mounting substrate 1, multiple backlights 3 and a driving board 4, and the backlight 3 is arranged on the mounting substrate 1 or the driving board 4. In this way, intelligent adjustment of the backlight is achieved, and while meeting the brightness requirements of each display content in the virtual image, power consumption is minimized, thereby reducing the heat received by the display screen, thereby avoiding damage to the display screen due to excessive temperature. However, since the display screen of the HUD (such as a TFT screen) is generally small in size, if a large number of LED backlights are arranged, it may cause the problem that each LED cannot be properly routed, and it may also cause relatively large pressure on the heat dissipation design.

[0033] like Figures 1 to 4 As shown, the embodiment of the present disclosure provides a backlight lamp board of a head-up display, including a mounting substrate 1, a backlight lamp 3 and a driving board 4. The backlight lamp 3 is mounted on the mounting substrate 1, and the driving board 4 is electrically connected to the backlight lamp 3. The driving board 4 or the mounting substrate 1 is provided with a conductive circuit. There are multiple backlight lamps 3, and the multiple backlight lamps 3 are respectively connected to the corresponding conductive circuits, so that the brightness of at least part of the backlight lamps 3 can be independently controlled by the driving board 4. For example, the driving board 4 can independently control the brightness of each backlight lamp 3, such as the driving board 4 independently controls the opening and closing of each backlight lamp 3. The backlight lamp board of the head-up display of the embodiment of the present disclosure utilizes the driving board 4 or the mounting substrate 1 to route the wiring separately, so as to realize the regional control of the brightness of multiple backlight lamps 3, thereby realizing the intelligent adjustment of the backlight, and minimizing the power consumption while meeting the brightness requirements of each display content in the virtual image, thereby reducing the heat received by the display screen, thereby avoiding damage to the display screen due to excessive temperature.

[0034] Furthermore, the backlight lamp board utilizes the driving board 4 or the mounting substrate 1 for separate wiring, which facilitates the installation of more backlight lamps on the backlight lamp board, thereby improving the display effects such as the display brightness and clarity of the virtual image displayed by the head-up display (HUD).

[0035] It should be noted that, for example, the driving board 4 uses a flexible circuit board. The flexible circuit (FPC) is a technology developed by the United States in the 1970s for the development of space rocket technology. It is a printed circuit with high reliability and excellent flexibility made of polyester film or polyimide as a substrate. By embedding the circuit design on a bendable thin plastic sheet, a large number of precision components are stacked in a narrow and limited space, thereby forming a bendable flexible circuit. This circuit can be bent and folded at will, is light in weight, small in size, has good heat dissipation, and is easy to install, breaking through the traditional interconnection technology. In the structure of the flexible circuit, the materials are insulating film, conductor and adhesive.

[0036] For example, Figure 2 and Figure 3 As shown, the conductive circuit can be set on the driving board 4. The driving board 4 is made of non-metallic material. The conductive circuit is formed on the driving board 4 through etching, drilling, molding and other processes. The driving board 4 can be made into a single layer or a multi-layer wiring according to the wiring requirements of the backlight 3. The driving board 4 forms the conductive circuit required by the backlight 3.

[0037] Furthermore, in some embodiments of the present disclosure, the backlight lamp board further includes a driving element 6, which is disposed on the driving board 4 and connected to the conductive circuit to drive the backlight 3 to turn on and off. In this way, not only can the driving element 6 control the turning on and off of each backlight 3 and the brightness of each backlight 3 through the conductive circuit, but also the driving element 6, the backlight 3 and the conductive circuit can be reasonably arranged with sufficient space.

[0038] Of course, in other embodiments, the driving element 6 may be disposed on the driving board 4 or on the mounting substrate 1 .

[0039] Furthermore, in some embodiments of the present disclosure, the conductive circuit is provided on the driving board 4, the driving board 4 is located above the mounting substrate 1, and the driving board 4 leads out a connecting wire, one end of the connecting wire is connected to the conductive circuit, and the other end is connected to the mounting substrate 1. This facilitates the electrical connection between the driving board 4 and the mounting substrate 1, and facilitates the driving board 4 to control the brightness of each backlight 3 through the conductive circuit.

[0040] For example, the driving board 4 is pressed, welded or hot-riveted on the mounting substrate 1 to make it a wiring design, and then the conductive line is led out to the mounting substrate 1, and a window is made on the pad 2 on the mounting substrate 1 to facilitate the installation of the backlight 3. This design scheme improves the heat dissipation efficiency of the backlight 3 while ensuring the circuit performance, thereby extending the service life of the backlight 3.

[0041] Further, in some embodiments of the present disclosure, the driving board 4 is connected to the mounting substrate 1 through the electrical connection point 5, which is convenient for improving the connection strength and reliability of the driving board 4 and the mounting substrate 1. And / or, in some embodiments of the present disclosure, the backlight 3 is connected to the mounting substrate through the electrical connection point, which is convenient for improving the connection strength and reliability of the backlight 3 and the mounting substrate 1. And / or, in some embodiments of the present disclosure, the mounting substrate 1 includes a substrate and a high thermal conductivity insulating layer. This not only facilitates the installation and heat dissipation of the backlight 3, but also avoids short circuits between the backlights 3 or other components on the mounting substrate 1, thereby ensuring the reliability of the circuit. For example, the electrical connection point 5 has a low surface oxygen characteristic, can be attached to various substrates, such as metals, insulating materials, etc., and has a wide temperature range of use. It is mainly used for electromagnetic shielding and antistatic. The electrical connection point 5 is placed on the substrate surface, combined with the metal substrate, has excellent conductivity, and provides an electromagnetic shielding effect. Similarly, the driving board 4 can also be connected to the backlight 3 using other metal materials, such as copper foil, silver foil, tin foil and other metals with good conductivity.

[0042] Furthermore, in some embodiments of the present disclosure, each backlight 3 is overlapped on the mounting substrate 1 through two pads 2, the pads 2 are connected to the electrical connection point 5, and the driver board 4 is overlapped on the electrical connection point 5. The backlight 3 is fixed to the mounting substrate 1 through the pads 2, and the electrical connection point 5 is set on the pads 2. The electrical connection point 5 is used to realize the electrical connection between the backlight 3 and the driver board 4. The driver board 4 can be used to provide a setting space for the conductive circuit of the backlight 3, and realize the regional control of the backlight 3 through the conductive circuit. Among them, in some embodiments, the driver board 4 and the mounting substrate 1 are connected by pressing, welding, and hot riveting through the pads 2. After the driver board 4 is pressed with the mounting substrate 1, the part pads 2 will appear on its surface. When performing surface assembly, a tinning machine is used for tinning and printing, and the subsequent production process remains unchanged.

[0043] Furthermore, the driving board 4 includes a core board and at least two insulating layers, the core board and the insulating layers are alternately arranged, and the conductive circuit is formed on the core board. In this way, the arrangement of multi-layer circuits can be realized on the driving board 4, so that the driving board 4 can accommodate and arrange more conductive circuits.

[0044] Further, such as Figure 2 As shown, in some embodiments of the present disclosure, the driving board 4 includes an insulating substrate, the insulating substrate is provided with a wiring area 401, a wiring channel 402 is opened in the wiring area 401, and a conductor is filled in the wiring channel 402 to form a conductive line. Since the insulating substrate is made of polyester film or polyimide as a base material, it is convenient to punch holes, so it is only necessary to open the wiring channel 402 by punching holes on the driving board 4 and fill the wiring channel 402 with a conductor with good conductivity to meet the wiring requirements.

[0045] Further, such as Figure 3 As shown, in some embodiments of the present disclosure, the backlight 3 is mounted on the mounting substrate 1, and the mounting substrate 1 is pressed, welded, and hot-riveted with the driving board 4. In this way, the arrangement of multi-layer circuits can be realized on the driving board 4, so that the driving board 4 can accommodate and arrange more conductive circuits.

[0046] For example, the driving board 4 is made of epoxy resin material and reinforced fibers such as glass fiber, and has the advantages of high mechanical strength, good insulation, stable processing performance, etc. Through the PCB processing technology, the raw materials are first cut into the required size, and then etched, drilled, formed, etc., and finally the driving board 4 is obtained. The pad 2 is set at the wiring area 401 of the driving board 4, and the mounting substrate 1 with the backlight 3 installed is connected to the driving board 4 through the pad 2.

[0047] Further, such as Figure 2 As shown, in some embodiments of the present disclosure, the driving element 6 is mounted on the driving board 4. For example, two mounting operations are required in the surface assembly process. In the first mounting operation, the driving element 6 is mounted on the driving board 4. Here, the driving element 6 may include devices such as a connector 601 and a chip 602 to complete the mounting of the driving function of the driving board 4. In the second mounting operation, the driving board 4 and the backlight 3 are mounted on the mounting substrate 1 to complete the second mounting operation. In some embodiments of the present disclosure, when designing the circuit schematics and PCB layout diagrams of the driving board 4 and the mounting substrate 1, it is necessary to determine the board size, maturity, line width and line spacing and other parameters according to the circuit requirements.

[0048] Furthermore, in some embodiments of the present disclosure, there are multiple conductive circuits, and the multiple conductive circuits correspond to the multiple backlights one by one, so as to independently control the brightness of the multiple backlights 3 and realize regional control of the backlights 3. In other words, by controlling the multiple backlights 3 by the multiple conductive circuits one by one, the brightness of each backlight 3 can be independently controlled, for example, the on and off of each backlight 3 can be independently controlled, and intelligent adjustment of the backlight can be realized.

[0049] Further, such as Figure 4 As shown, in some other embodiments of the present disclosure, the conductive circuit is arranged on the mounting substrate 1, the backlight 3 is attached to the mounting substrate 1 and electrically connected to the conductive circuit, the driving element 6 is attached to the driving board 4, and the driving board 4 is fixedly connected to the mounting substrate 1 through the connecting pad 2. For example, components such as the chip 602 and the connector 601 are all mounted on the driving board 4, the conductive circuit is formed on the mounting substrate 1, the backlight 3 is also mounted on the mounting substrate 1, the mounting substrate 1 is also provided with a connecting pad 2, and the driving board 4 is connected to the mounting substrate 1 using a hot pressing welding device. This embodiment sets the conductive circuit corresponding to the backlight 3 through the mounting substrate 1, and drives the independent opening and closing of each backlight 3 through the driving element 6 on the driving board 4.

[0050] For example, the driving board 4 is made of FRC material because it is flexible, thin, and has good bending properties and can meet the requirements of hot pressing welding; the mounting substrate 1 is made of an aluminum substrate because it has good thermal conductivity and heat dissipation, and is suitable for use with high-power LED lamps.

[0051] It should be noted that the size, number of layers, line width and line spacing and other parameters of the mounting substrate 1 can be determined according to the requirements of the circuit. For example, on a mounting substrate 1 of 107×50 mm, 60 conductive lines corresponding to the backlights 3 can be arranged.

[0052] In summary, the backlight lamp board of the head-up display provided by the embodiment of the present disclosure, through the coordinated use of the driving board 4 and the mounting substrate 1, facilitates the installation and setting of the backlight 3, the arrangement of the conductive circuit corresponding to the backlight 3, and the heat dissipation of the backlight system, thereby realizing regional control of the backlight of the head-up display (HUD). In this way, the intelligent adjustment of the image source backlight of the head-up display is realized, and the power consumption is minimized while meeting the brightness requirements of each display content in the virtual image, thereby reducing the heat received by the display screen, thereby avoiding damage to the display screen due to excessive temperature.

[0053] Furthermore, an embodiment of the present disclosure also provides a head-up display, including a backlight panel of the head-up display in any of the above embodiments.

[0054] Furthermore, the embodiments of the present disclosure also provide a means of transportation, including the head-up display in the above embodiments.

[0055] For example, the head-up display includes a display panel, and the display panel includes multiple display areas, and the multiple display areas correspond to multiple backlights one by one. The control module determines the brightness information corresponding to each display area according to the image to be displayed on the display panel; determines the target brightness corresponding to each backlight according to the brightness information corresponding to each display area; and controls each backlight based on the target brightness corresponding to each backlight. When the head-up display provided by the present disclosure is displaying, the target brightness corresponding to each backlight in the head-up display image source is determined according to the image to be displayed, and the backlight is controlled according to the target brightness. By controlling each backlight individually, the light waste caused by lighting all the backlights is avoided, the power consumption is reduced, and the light utilization rate and image contrast are improved.

[0056] For example, according to the distribution of the display content in each display area in the image to be displayed, the display area of ​​the display panel can be divided into a dark area and a brightness area. The dark area is a display area with low display brightness (or no display content), and the bright area is a display area with high display brightness (or display content). The brightness information corresponding to the bright area and the dark area is different, and the target brightness of the backlight determined according to the brightness information is also different, so as to achieve the backlight control of the dark area and the bright area of ​​the image respectively. Since the backlight brightness of the dark area and the brightness is different, the effect of improving the image contrast can be achieved, and then the contrast of the virtual image formed by the head-up display is also improved. At the same time, reducing the brightness of the backlight corresponding to the dark area or turning off the backlight in the dark area can also reduce the backlight power consumption, thereby reducing the overall power consumption of the display panel.

[0057] For example, according to the image to be displayed on the display panel, a pixel group corresponding to each display area is determined, and the pixel group includes multiple pixels. Specifically, the image to be displayed is composed of multiple pixels, each pixel displays a color, and the pixel group in the image to be displayed corresponding to each display area can be determined according to the distribution of the display content in the image to be displayed in each display area, that is, the multiple pixels in the image to be displayed corresponding to each display area. Among them, the display panel includes multiple pixel units, each pixel unit corresponds to a group of three primary color filters, and one pixel in the image to be displayed corresponds to one pixel unit on the display panel.

[0058] For example, Figure 5 As shown, the head-up display system includes a head-up display and a reflective imaging unit 20. The reflective imaging unit 20 is located on the light-emitting side of an image source 10 of the head-up display and is configured to reflect imaging light emitted by the image source 10 to an eye box area 30 of the head-up display, so that the user can view a virtual image formed at an imaging position 40 outside the reflective imaging unit 20 when both eyes of the user are located in the eye box area 30.

[0059] For example, the head-up display uses the reflective imaging unit 20 to reflect the outgoing light of the image source 10, so that the observer can simultaneously observe the virtual image formed outside the reflective imaging unit 20 and the object outside the reflective imaging unit 20 in the eye box area 30. When the head-up display provided by the embodiment of the present disclosure is displayed, each backlight can be individually controlled for the image to be displayed, thereby avoiding turning on all the backlights, and only turning on part of the backlights, and the luminous brightness of each backlight can also be independently controlled. By controlling the backlight of different areas corresponding to the image to be displayed, it is possible to turn off some backlights and light up other backlights, thereby improving the image contrast, thereby improving the contrast of the virtual image imaged by the head-up display, and at the same time, the power consumption of the head-up display can be reduced by turning off some backlights or reducing the brightness of some backlights.

[0060] For example, Figure 5As shown, the head-up display further includes an amplifying component, which includes, for example, a curved reflector 70, or includes a curved reflector 70 and a flat reflector 60. The amplifying component is used to reflect the image light emitted by the image source 10 to the reflective imaging unit 20 to amplify the image displayed in the image source 10 into a virtual image, wherein the image light is emitted through the exit port 50 of the head-up display.

[0061] For example, the reflective imaging unit 20 may be a windshield of a vehicle, and the eye box area may be an area where the observer needs to view the imaging according to actual needs, namely, the eye box area (eyebox). The eye box area refers to the area where the observer's eyes are located and where the image displayed by the display device can be seen, such as a plane area or a three-dimensional area.

[0062] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0063] The above description is only a specific embodiment of the present disclosure, so that those skilled in the art can understand or implement the present disclosure. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure will not be limited to the embodiments described herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A backlight panel for a head-up display, characterized in that: The invention comprises a mounting substrate (1), a plurality of backlight lamps (3) and a driving board (4), wherein the backlight lamps (3) are mounted on the mounting substrate, the driving board (4) is electrically connected to the backlight lamps (3), the driving board (4) or the mounting substrate (1) is provided with a conductive circuit, and the plurality of backlight lamps (3) are respectively connected to the corresponding conductive circuits so that the brightness of at least part of the backlight lamps (3) can be independently controlled through the driving board (4).

2. The backlight panel of the head-up display according to claim 1, characterized in that: It also comprises a driving element (6), wherein the driving element (6) is arranged on the driving board (4), and the driving element (6) is connected to the conductive circuit and is used to drive the backlight (3) to turn on and off.

3. The backlight panel of the head-up display according to claim 1 or 2, characterized in that: The conductive circuit is arranged on the driving board (4), and the driving board (4) is located above the mounting substrate (1). The driving board (4) leads out a connecting line, one end of which is connected to the conductive circuit, and the other end of which is connected to the mounting substrate (1).

4. The backlight panel of the head-up display according to claim 1, characterized in that: The driving board (4) is connected to the mounting substrate (1) via an electrical connection point (5); and / or, The backlight (3) is connected to the mounting substrate (1) via an electrical connection point (5); and / or, The mounting substrate (1) comprises a base body and a high thermal conductivity insulating layer.

5. The backlight panel of the head-up display according to claim 4, characterized in that: Each of the backlight lamps (3) is overlapped on the mounting substrate (1) via two solder pads (2), the solder pads (2) are connected to the electrical connection points (5), and the drive board (4) is overlapped on the electrical connection points (5).

6. The backlight panel of the head-up display according to claim 1 or 2, characterized in that: The driving board (4) comprises a core board and at least two insulating layers, the core board and the insulating layers are arranged alternately, and the conductive circuit is formed on the core board.

7. The backlight panel of the head-up display according to claim 1 or 2, characterized in that: The driving board (4) comprises an insulating substrate, the insulating substrate is provided with a wiring area (401), a wiring channel (402) is provided in the wiring area (401), and a conductor is filled in the wiring channel (402) to form the conductive circuit.

8. The backlight panel of the head-up display according to claim 7, characterized in that: The backlight (3) is mounted on the mounting substrate (1), and the mounting substrate (1) is pressed, hot-riveted or welded to the driving board (4) at the wiring area (401) of the driving board (4).

9. The backlight panel of the head-up display according to claim 2, characterized in that: The driving element (6) is attached to the driving plate (4).

10. The backlight panel of the head-up display according to claim 1 or 2, characterized in that: There are a plurality of conductive circuits, and there is a one-to-one correspondence between the plurality of conductive circuits and the plurality of backlight lamps (3), so as to independently control the brightness of the plurality of backlight lamps (3).

11. The backlight lamp board of the head-up display according to claim 1 or 2, characterized in that: The conductive circuit is arranged on the mounting substrate (1), the backlight (3) is arranged on the mounting substrate (1) and is electrically connected to the conductive circuit, and the drive board (4) is fixedly connected to the mounting substrate (1) via a connecting pad (2).

12. A head-up display, characterized in that: A backlight panel comprising a head-up display as described in any one of claims 1-11.

13. A means of transport, characterized in that: Comprising a heads-up display as claimed in claim 12.

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