Image forming unit, panoramic head-up display system and motor vehicle

Abstract

The present disclosure relates to an image forming unit (20) for a panoramic head-up display system (10), the image forming unit (20) extending in a first direction (X) and comprising: a display assembly (21); the heat dissipation assembly (22) is in heat conduction connection with the display assembly, and the heat dissipation assembly comprises a back plate (221) which is in heat conduction connection with the display assembly; the cover plate (222) covers the back plate (221), an air flow channel (30) is formed between the back plate and the cover plate, an air flow outlet (32) is formed in at least one end of the air flow channel in the first direction (X), and an air inlet (31) is formed in the cover plate (222); and the fan (223) is arranged in the air flow channel and is opposite to the air inlet. The utility model further relates to a panoramic head-up display system and a motor vehicle.

Description

Technical Field

[0001] This disclosure relates to an image forming unit, a panoramic head-up display system, and a motor vehicle. Background Technology

[0002] Panavision HUD is an advanced head-up display technology for motor vehicles. Using optical technology, it projects information such as navigation and vehicle speed onto the bottom of the windshield in front of the driver's line of sight, spanning from the A-pillar of the driver's seat to the A-pillar of the passenger seat. Therefore, it can also be called a widescreen or panoramic head-up display system. Panavision HUDs not only reduce the time drivers take their eyes off the road, significantly reducing driver distraction, lowering accident risk, and improving driving safety, but also provide drivers with a new driving experience.

[0003] Panoramic head-up display (HUD) systems typically include an image forming unit to generate an image to be projected onto the bottom of the windshield. Light sources are also used in HUD systems for projection. However, due to the wide display area, a large number of light sources are required in panoramic HUD systems, sometimes reaching hundreds when using LEDs. This necessitates timely dissipation of the significant heat generated by these light sources during illumination. Furthermore, the heat generated by other power electronics chips in the image forming unit, such as the LED drivers, also needs to be dissipated.

[0004] However, when a panoramic head-up display system is installed in a motor vehicle, the image forming unit is usually installed in the console. In this case, the limited structural space also results in very little space for convection heat dissipation. In addition, its small structural thickness is not conducive to heat dissipation. Therefore, a high heat dissipation efficiency is required in general to avoid heat accumulation inside the system or on the screen surface, which could cause thermal damage. Utility Model Content

[0005] This disclosure aims to provide an image forming unit, a panoramic head-up display system, and a motor vehicle that overcome the aforementioned drawbacks.

[0006] This disclosure proposes an image forming unit, a panoramic head-up display system, and a motor vehicle that overcome the aforementioned disadvantages and bring about other technical effects by adopting the following technical features.

[0007] On one hand, this disclosure proposes an image forming unit for a panoramic head-up display system, the image forming unit extending along a first direction and comprising:

[0008] Display components;

[0009] The display component is thermally connected to the heat dissipation component.

[0010] The heat dissipation component includes:

[0011] A backplate, which is thermally connected to the display component;

[0012] A cover plate covers the back plate and forms an air passage between the back plate and the cover plate, the air passage having an air outlet at at least one end along the first direction, and an air inlet being provided on the cover plate;

[0013] A fan is disposed in the airflow channel and opposite to the air inlet.

[0014] In some embodiments, the fan is configured as an axial fan that delivers air through the air inlet into the airflow channel and out through the airflow outlet.

[0015] In some embodiments, the fan is centrally mounted on the image forming unit along the first direction or mounted at one of the two ends of the airflow channel along the first direction.

[0016] In some embodiments, a turbulence-inducing structure is arranged in the airflow channel.

[0017] In some embodiments, the turbulence structure is configured as a plurality of protrusions on the back plate and / or cover plate, the height of the protrusions from the back plate and / or cover plate being equivalent to the distance between the back plate and the cover plate.

[0018] In some embodiments, a plurality of protrusions are arranged to form a plurality of rows parallel to the air outflow direction and a plurality of columns perpendicular to the air outflow direction.

[0019] In some embodiments, the protrusions in the rows or columns are aligned or staggered with each other.

[0020] In some embodiments, the protrusion has a rectangular, triangular, or teardrop shape in a cross-section perpendicular to the protrusion direction.

[0021] In some embodiments, the protrusion has a V-shape in a cross-section perpendicular to the protrusion direction, with the tip of the V-shape pointing in the direction of the fan.

[0022] In some embodiments, the protrusion has a Y-shaped shape in a cross-section perpendicular to the protrusion direction, with the straight edge of the lower part of the Y-shaped shape pointing in the direction of the fan.

[0023] In some embodiments, the display component includes an LED light-emitting element and a substrate, wherein the substrate is thermally connected to the backplate.

[0024] In some embodiments, thermally conductive silicone is disposed on the substrate and connected to the back plate through the thermally conductive silicone.

[0025] In some embodiments, a dustproof screen is provided on the air inlet.

[0026] On the other hand, this disclosure proposes a panoramic head-up display system, which includes at least one image forming unit as described in any one of the foregoing contents of this disclosure.

[0027] On the other hand, this disclosure proposes a motor vehicle having a panoramic head-up display system as described in this disclosure.

[0028] The preferred embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings so that the features and advantages of the present disclosure can be readily understood. Attached Figure Description

[0029] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the accompanying drawings of the embodiments of this disclosure will be briefly described below. The drawings are merely illustrative of some embodiments of this disclosure and are not intended to limit all embodiments of this disclosure to them.

[0030] Figure 1 The diagram shows the layout and optical path of a panoramic head-up display system in a motor vehicle.

[0031] Figure 2 An external stereoscopic oblique view of the image forming unit is shown;

[0032] Figure 3 A front perspective oblique view of the display component of the image forming unit is shown;

[0033] Figure 4 A rear perspective oblique view of the display component of the image forming unit is shown;

[0034] Figure 5 A front perspective perspective view of the heat dissipation assembly of the image forming unit is shown;

[0035] Figure 6 A rear perspective perspective view of the heat dissipation assembly of the image forming unit is shown;

[0036] Figure 7 Other designs for the cross-sectional shape of the protrusion as a spoiler structure are shown;

[0037] Figure 8 Another design for the cross-sectional shape of the protrusion, which serves as a flow-disrupting structure, is shown.

[0038] Figure 9An exploded perspective view of the display component and heat dissipation component of the image forming unit is shown.

[0039] List of reference numerals

[0040] 10 Panoramic Head-Up Display System

[0041] 20 image forming units

[0042] 21 Display Components

[0043] 211 substrate

[0044] 212 thermally conductive silicone

[0045] 22 heat dissipation components

[0046] 221 backplate

[0047] 222 cover plate

[0048] 223 fan

[0049] 23 Fixing Part

[0050] 30 airflow channels

[0051] 31 Air Inlet

[0052] 32 air outlets

[0053] 33 protrusions

[0054] 34 dustproof net

[0055] 40 windshield

[0056] 50 Eyes

[0057] 60 virtual images Detailed Implementation

[0058] To make the objectives, technical solutions, and advantages of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. The same reference numerals in the drawings represent the same components. It should be noted that the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0059] Compared to the embodiments shown in the accompanying drawings, feasible embodiments within the scope of this disclosure may have fewer components, other components not shown in the drawings, different components, components arranged differently, or components with different connections, etc. Furthermore, two or more components in the drawings may be implemented in a single component, or a single component shown in the drawings may be implemented as multiple separate components.

[0060] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure pertains. The terms “first,” “second,” and similar terms used in this patent application specification do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms “an” or “a” and similar terms do not necessarily indicate a quantity limitation. The terms “comprising” or “including” and similar terms mean that the element or object preceding the word encompasses the element or object listed following the word and its equivalents, without excluding other elements or objects. The terms “connected” or “linked” and similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms “upper,” “lower,” “left,” and “right” are used only to indicate relative positional relationships, which may change accordingly when the absolute position of the described object changes.

[0061] Figure 1 The diagram illustrates the layout and optical path of a Panavision HUD 10 in a motor vehicle. The diagram schematically shows the front area of ​​the vehicle, including the windshield 40, console, and steering wheel. The Panavision HUD 10 typically includes at least one image forming unit 20, which can be positioned within the vehicle's console. Images generated by the image forming unit 20, such as vehicle speed and navigation information, can be projected onto the lower area of ​​the windshield 40. When a person's eye 50 looks at this area, they see a virtual image 60 of these images, represented by a wide bar symbol from the image forming unit 20 to the windshield 40 and a long triangle from the eye 50 through the windshield 40 to the virtual image 60.

[0062] The panoramic head-up display system 10 displays an image that extends from the driver's side A-pillar to the passenger side A-pillar, hence it can also be called a widescreen or wide-view head-up display system. By projecting key information within the driver's field of vision, it minimizes instances where the driver's gaze deviates from the road ahead. This display method effectively alleviates driver distraction, thereby reducing the probability of traffic accidents and further enhancing driving safety. Simultaneously, the immersive interactive experience provided by the panoramic head-up display system creates a more intelligent and comfortable driving environment for the driver.

[0063] For projection, a panoramic head-up display system also uses light sources. However, because the display needs to cover almost the entire width of the vehicle, a large number of light sources are required in a panoramic head-up display system; for example, hundreds of LED lights can be used. This necessitates timely and effective dissipation of the significant heat generated by these light sources during illumination. Furthermore, the heat generated by other power electronic chips in the image forming unit, such as the LED drivers, also needs to be dissipated promptly and effectively.

[0064] The challenges are twofold: firstly, the image forming unit is located within a control console, where limited internal space results in a small effective area for convective heat dissipation; secondly, the image forming unit typically has a thin structure, further increasing the difficulty of heat dissipation. Therefore, higher heat dissipation efficiency is required to prevent heat accumulation inside the system or on the display surface, avoiding the risk of thermal damage.

[0065] To address the aforementioned problems, this disclosure first proposes an image forming unit 20, which can be used in a panoramic head-up display system 10. The image forming unit 20 extends along a first direction X, as shown below. Figure 2 As shown, the image forming unit 20 extends in a first direction X. The first direction X may be aligned with the lateral or width direction of the vehicle in which the panoramic head-up display system 10, or image forming unit 20, is installed. Figure 2 The image forming unit 20 is also shown to have a fixing part 23 for mounting the image forming unit 20 in, for example, a console of a motor vehicle.

[0066] The image forming unit 20 may include a display component 21 and a heat dissipation component 22, which are substantially connected to each other in a direction perpendicular to the first direction X. Figure 3 and Figure 4 The front and rear perspective views of the display component 21 of the image forming unit 20 are shown respectively. Figure 5 and Figure 6 The figures show front and rear perspective views of the heat dissipation assembly 22 of the image forming unit 20. The display assembly can be thermally connected to the heat dissipation assembly. In the image forming unit 20 shown, the rear of the display assembly 21 is thermally connected to the front of the heat dissipation assembly 22. The heat dissipation assembly may include a back plate 221, as shown in the attached figure. Figure 6 As shown, the backplate 221 on the front of the heat dissipation assembly 22 is thermally connected to the display assembly 21.

[0067] The heat dissipation assembly may further include a cover plate 222, which can cover the back plate 221 and form an airflow channel 30 between the back plate 221 and the cover plate 222. Figure 9 The airflow channel is indicated by reference numeral 30 when the back plate 221 and the cover plate 222 are separated; in reality, this airflow channel is formed by the closure of the back plate 221 and the cover plate 222. The airflow channel may have an air outlet 32 ​​at at least one end along the first direction X. Figure 6 Only the air outlet 32 ​​on the side closest to the observer is shown; of course, such an air outlet could also be provided on the opposite side. An air inlet 31 is provided on the cover plate 222. The heat dissipation assembly 22 may also include a fan 223, which is disposed in the air channel 30 and opposite the air inlet 31. Air can thus be drawn from the air inlet 31 into the air channel formed by the back plate 221 and the cover plate 222 through the fan 223 and exit from the air outlet 32. This active heat dissipation method effectively improves heat dissipation efficiency by forcibly removing heat in situations with limited structural space and thin components.

[0068] The fan 223 can be configured as an axial flow fan, which delivers air through the air inlet 31 into the airflow channel 30 and exits from the airflow outlet 32. To reduce noise generated during fan operation, it can be designed as a silent axial flow fan, for example. The speed of the fan 223 can be controlled by a signal from a temperature sensor, using a frequency converter to adjust to different cooling requirements.

[0069] The fan 223 is centrally mounted on the image forming unit 20 along the first direction X, such as Figure 9 As shown, the fan 223 is centrally mounted on the back plate 221, and correspondingly, the air inlet 31 on the cover plate 222 is also located at the center of the cover plate 222 in the first direction X. In this case, the fan 223 can introduce air from the air inlet 31 into the airflow channel 30 and exhaust it towards both ends of the airflow channel 30. Alternatively, the fan 223 can be mounted at one of the two ends of the airflow channel 30 along the first direction X, and correspondingly, the air inlet 31 on the cover plate 222 is also located at the corresponding end of the cover plate 222. In this design, the fan 223 can introduce air into the airflow channel 30 from one end and exhaust it from the other end along the first direction X.

[0070] A turbulence-inducing structure is arranged in the airflow channel 30. The turbulence-inducing structure in the airflow channel can change the flow pattern of the air in the airflow channel, so that the air can make more full contact with the parts that need to dissipate heat, thereby removing more heat and improving the heat dissipation efficiency and heat dissipation uniformity.

[0071] The turbulence-inducing structure shown in the attached figure is constructed as multiple protrusions 33 on the back plate 221. Of course, in designs not shown in the figure, the protrusions 33 can also be located on the cover plate 222, or on both the back plate 221 and the cover plate 222. These protrusions extend from the back plate and / or the cover plate into the airflow channel. The height of the protrusions 33 from the back plate 221 or the cover plate 222 is equivalent to the distance between the back plate 221 and the cover plate 222. This alters the airflow path across the entire airflow channel height, effectively disrupting the laminar flow state, enhancing turbulence, and achieving more complete heat exchange.

[0072] Figure 9 As can be seen, multiple protrusions 33 can be arranged to form multiple rows parallel to the airflow direction and multiple columns perpendicular to the airflow direction. In the figure, three rows and four columns of protrusions 33 are respectively arranged on both sides of the fan 223. The arrangement of multiple protrusions in rows or columns can better guide the airflow distribution, and the air can cover the entire area more evenly, avoiding local overheating.

[0073] The protrusions 33 in such rows or columns can be designed to be aligned or staggered. Figure 9 The figure shows the mutually aligned arrangement of the protrusions 33. In the staggered arrangement of the protrusions (not shown in the figure), the path and velocity distribution of the airflow can be further optimized, and the turbulence can be further enhanced without increasing the number of protrusions.

[0074] The cross-sectional shape of the protrusion perpendicular to the direction of the protrusion can be designed in various ways, such as circular, semi-circular, rectangular, triangular, or teardrop-shaped (e.g.) Figure 7 (as shown), or Y-shaped or T-shaped (as shown) Figure 8 (As shown). This enhances the effect of turbulence on the airflow in the air passage.

[0075] exist Figure 9 In the design, the protrusion 33 has a V-shaped cross-section perpendicular to the direction of the protrusion, with the tip of the V-shape pointing towards the fan 223. That is, air is driven by the fan 223 to the tip of the V-shape, and then turbulent by the outwardly separated side or end flow.

[0076] Correspondingly, when the cross-sectional shape of the protrusion is designed as Y-shaped, the straight edge of the lower part of the Y-shaped structure points towards the direction of the fan 223.

[0077] Display component 21 may include LED light-emitting elements and substrate 211, wherein substrate 211 is thermally connected to back plate 221. Figure 3 and Figure 4The LED light-emitting elements are arranged in the space formed by the front screen and the rear substrate 211. The light emitted by the LED light-emitting elements projects the image on the screen outward. The substrate 211, as the rear part of the display component 21, can be thermally connected to the back plate 221 of the heat dissipation component 22.

[0078] In order to enhance the heat transfer from the display component 21 or substrate 211 to the heat dissipation component 22 or back plate 221, thermally conductive silicone 212 may be provided on the substrate 211 and connected to the back plate 221 through the thermally conductive silicone.

[0079] like Figure 9 As shown in the exploded view, a dustproof screen 34 can be arranged on the air inlet 31 to protect the fan 223 and the entire airflow path. The dustproof screen 34 can be installed on the cover plate 222 by adhesive or bolting.

[0080] The image forming unit 20 described above can be used in a panoramic head-up display system 10, which includes at least one image forming unit 20 according to this disclosure. For example, the panoramic head-up display system may have three image forming units, one of which is configured as the image forming unit 20 according to this disclosure. Of course, the remaining image forming units need to be appropriately designed to ensure smooth airflow from the inlet to the outlet.

[0081] The exemplary implementation of the solution proposed in this disclosure has been described in detail above with reference to preferred embodiments. However, those skilled in the art will understand that various modifications and alterations can be made to the above specific embodiments without departing from the spirit of this disclosure, and various combinations can be made to the various technical features and structures proposed in this disclosure without exceeding the protection scope of this disclosure.

Claims

1. An image forming unit (20) for use in a panoramic head-up display system (10), characterized in that, The image forming unit (20) extends along a first direction (X) and the image forming unit (20) includes: Display component (21); The heat dissipation assembly (22) is thermally connected to the display assembly (21). The heat dissipation component (22) includes: A backplate (221) is thermally connected to the display assembly (21); A cover plate (222) covers the back plate (221) and forms an air passage (30) between the back plate (221) and the cover plate (222), the air passage (30) having an air outlet (32) at at least one end along the first direction (X), and an air inlet (31) provided on the cover plate (222). A fan (223) is disposed in the airflow channel (30) and opposite to the air inlet (31).

2. The image forming unit (20) according to claim 1, characterized in that, The fan (223) is configured as an axial flow fan, which delivers air through the air inlet (31) into the air channel (30) and out through the air outlet (32).

3. The image forming unit (20) according to claim 1 or 2, characterized in that, The fan (223) is centered on the image forming unit (20) along the first direction (X) or installed at one of the two ends of the airflow channel (30) along the first direction (X).

4. The image forming unit (20) according to claim 1 or 2, characterized in that, A turbulence structure is arranged in the airflow channel (30).

5. The image forming unit (20) according to claim 4, characterized in that, The turbulence structure is configured as a plurality of protrusions (33) on the back plate (221) and / or the cover plate (222), the height of which the protrusions (33) protrude from the back plate (221) and / or the cover plate (222) is equivalent to the distance between the back plate (221) and the cover plate (222).

6. The image forming unit (20) according to claim 5, characterized in that, Multiple protrusions (33) are arranged to form multiple rows parallel to the air outflow direction and multiple columns perpendicular to the air outflow direction.

7. The image forming unit (20) according to claim 6, characterized in that, The protrusions (33) in the row or column are aligned or staggered with each other.

8. The image forming unit (20) according to claim 5, characterized in that, The protrusion (33) has a rectangular, triangular or teardrop shape in a cross section perpendicular to the protrusion direction.

9. The image forming unit (20) according to claim 5, characterized in that, The protrusion (33) has a V-shaped cross-section perpendicular to the protrusion direction, with the tip of the V-shaped shape pointing towards the fan (223).

10. The image forming unit (20) according to claim 5, characterized in that, The protrusion (33) has a Y-shaped shape in a cross section perpendicular to the protrusion direction, and the straight edge of the lower part of the Y-shaped shape points in the direction of the fan (223).

11. The image forming unit (20) according to claim 1 or 2, characterized in that, The display component (21) includes an LED light-emitting element and a substrate (211), wherein the substrate (211) is thermally connected to the back plate (221).

12. The image forming unit (20) according to claim 11, characterized in that, Thermally conductive silicone (212) is disposed on the substrate (211) and connected to the back plate (221) through the thermally conductive silicone.

13. The image forming unit (20) according to claim 1 or 2, characterized in that, A dustproof net (34) is provided on the air inlet (31).

14. A panoramic head-up display system (10), characterized in that, The panoramic head-up display system (10) includes at least one image forming unit (20) according to any one of the preceding claims.

15. A motor vehicle, characterized in that, The motor vehicle has a panoramic head-up display system (10) as described in claim 14.

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