Head-up display device and vehicle

Abstract

The utility model provides a head-up display device, which comprises an image generation unit used for emitting image light; the light guide module comprises a first reflecting mirror, a shading piece and a diffusion piece; the first reflecting mirror, the shading piece and the diffusion piece are sequentially arranged on a light path of the image light, and the first reflecting mirror is arranged on one side close to the image generation unit; wherein the shading piece is used for transmitting light, the included angle between the incident direction of the light and the surface of the shading piece is located in a first range, and is used for shading light, the included angle between the incident direction of the light and the surface of the shading piece is located outside the first range; the included angle between the image light incident to the shading part and the surface of the shading part is located in the first range. The head-up display device provided by the utility model is beneficial to reducing stray light. The utility model further provides a vehicle comprising the head-up display device.

Description

TECHNICAL FIELD

[0001] The present application relates to a head-up display device and a vehicle. BACKGROUND

[0002] A common head-up display device is usually arranged in front of an instrument panel and below a windshield, so that during driving, sunlight may flow backward and shine into the head-up display device, and then be reflected from the head-up display device to the windshield, which may interfere with the display image observed by a user. SUMMARY

[0003] In an aspect, the present application provides a head-up display device, comprising:

[0004] an image generating unit, configured to emit image light;

[0005] a light guiding module, comprising a first reflector, a light shielding member and a diffusion member; the first reflector, the light shielding member and the diffusion member are sequentially arranged on an optical path of the image light, and the first reflector is arranged on a side close to the image generating unit.

[0006] The light shielding member is configured to transmit light with an incident direction and a surface of the light shielding member forming an angle within a first range, and to shield light with an incident direction and the surface of the light shielding member forming an angle outside the first range, and the image light incident on the light shielding member forms an angle with the surface of the light shielding member within the first range.

[0007] The head-up display device provided by the embodiments of the present application can transmit light with an incident direction and a surface of the light shielding member forming an angle within a first range, and shield light with an incident direction and the surface of the light shielding member forming an angle outside the first range, so that the light shielding member can transmit image light emitted from the image generating unit, block sunlight incident from an angle outside the first range, and at least partially block sunlight reflected by the first reflector after being transmitted from the first range, thereby reducing stray light caused by reflection of sunlight incident on the head-up display device, and improving display effect.

[0008] In an embodiment, the surface of the light shielding member is provided with a grating structure.

[0009] In an embodiment, the first range has a size less than or equal to 120°.

[0010] In an embodiment, an angle between the light shielding member and the first reflector is 30°-60°.

[0011] In an embodiment, a median value of the first range is 90°.

[0012] In an embodiment, the image light is incident on the light shield along a direction parallel to a normal line of the light shield.

[0013] In an embodiment, the light guiding module further comprises a second mirror and a third mirror, and the image light emitted from the diffusion member passes through the second mirror and the third mirror in sequence.

[0014] In an embodiment, the second mirror is a concave mirror, and the third mirror is a concave mirror.

[0015] In an embodiment, the light shield is arranged apart from the diffusion member.

[0016] Another aspect of the present application provides a vehicle, which at least comprises a dashboard housing, a windshield, and the head-up display device described above; wherein the head-up display device is mounted inside the dashboard housing, and the image light emitted by the head-up display device is projected on the windshield to form image information.

[0017] The vehicle provided by the embodiments of the present application can make the light shield transmit the image light emitted from the image generation unit, block sunlight incident from outside the first range, and at least partially block sunlight transmitted from the first range and reflected by the first mirror, so as to reduce stray light emitted by the sunlight incident on the head-up display device, and improve the display effect. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 FIG. 1 is a structural schematic diagram of a head-up display device in an embodiment of the present application.

[0019] Figure 2 FIG. 2 is a structural schematic diagram of a light shield in an embodiment of the present application.

[0020] Figure 3 FIG. 3 is a light path structural schematic diagram of a light shield and a first mirror in an embodiment of the present application.

[0021] Figure 4 FIG. 4 is a structural schematic diagram of a vehicle in an embodiment of the present application.

[0022] MAIN ELEMENT SYMBOL EXPLANATION

[0023] Head-up display device: 100

[0024] Image generation unit: 10

[0025] Light guiding module: 30

[0026] First mirror: 31

[0027] Light shielding member: 33

[0028] Substrate: 331

[0029] Grating structure: 333

[0030] Microstructure: 3331

[0031] Diffusion member: 35

[0032] Second mirror: 37

[0033] Third mirror: 39

[0034] Image light: L1

[0035] Stray light: L2

[0036] First range: a

[0037] Normal: N

[0038] Angle: b, q

[0039] Vehicle: 200

[0040] Instrument panel cover: 210

[0041] Windshield: 230

[0042] Virtual image: E.

[0043] The following detailed description will further illustrate the present application in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0044] The technical solutions in the embodiments of the present application will be described clearly and completely in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application.

[0045] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0046] In order to further clarify the technical means and effects taken by the present application to achieve the predetermined purpose, the following will be combined with the drawings and the preferred embodiments to make a detailed description of the present application as follows.

[0047] Please refer to Figure 1The head-up display device 100 provided by the embodiments of the present application comprises an image generating unit 10 and a light guiding module 30. The image generating unit 10 is configured to emit image light L1, and the light guiding module 30 is arranged on the light path of the image light L1 and configured to receive the image light L1 and guide the image light L1 to be emitted. The light guiding module 30 comprises a first mirror 31, a light shielding piece 33 and a diffusion piece 35, which are arranged on the light path of the image light L1 in sequence, and the first mirror 31 is arranged on the side close to the image generating unit 10.

[0048] Specifically, the image generating unit 10 is a display screen capable of displaying image information. The image generating unit 10 can comprise an RGB (Red, Green, Blue) light emitting diode (LED), a liquid crystal display (LCD), a liquid crystal on silicon (LCOS) device, an organic light emitting diode (OLED) array or other suitable display or stereoscopic display, and the present application does not limit the same. The image generating unit 10 is configured to emit image light L1 with image information, and the image light L1 is guided by the light guiding module 30 and finally projected into the user's eyes to form an image.

[0049] The first mirror 31 is a planar mirror, and the first mirror 31 is arranged on the light emitting direction of the image generating unit 10 and configured to reflect the image light L1 emitted by the image generating unit 10.

[0050] The light shielding piece 33 is arranged on one side of the first mirror 31 and configured to receive the image light L1 reflected and emitted by the first mirror 31. The light shielding piece 33 is configured to transmit light with an incident direction and a surface of the light shielding piece 33 within a first range α and to shield light with an incident direction and a surface of the light shielding piece 33 outside the first range α. Specifically, the range of the angle between the light incident to the light shielding piece 33 and the surface of the light shielding piece 33 is 0°-180°. The first range α is a range with a specific angle between the surface of the light shielding piece 33. When the angle between the light incident to the surface of the light shielding piece 33 and the surface of the light shielding piece 33 is within the first range α, the light can be transmitted and emitted from the light shielding piece 33. When the angle between the light incident to the surface of the light shielding piece 33 and the surface of the light shielding piece 33 is outside the first range α, the light is shielded by the light shielding piece 33 and thus cannot be transmitted and emitted from the light shielding piece 33.

[0051] Please refer to Figure 2The light shielding member 33 includes a substrate 331 and a grating structure 333 disposed on the substrate 331. Specifically, in this embodiment, the substrate 331 is made of a light-transmissive material, and the grating structure 333 is specifically a microstructure layer formed on the surface of the substrate 331. The grating structure 333 includes a plurality of microstructures 3331 arranged at intervals, which can be columnar structures, conical structures or prismatic structures protruding perpendicularly from the surface of the substrate 331. The microstructures 3331 are made of a light-opaque material, and light incident on the light shielding member 33 from the gap between the microstructures 3331 is transmitted perpendicularly. Light incident on the light shielding member 33 obliquely is blocked by the microstructures 3331. As the oblique angle between the incident light and the light shielding member 33 increases, the light is completely blocked by the microstructures 3331. The angle at which the light is completely blocked by the microstructures 3331 is the boundary of the first range a of the light shielding member 33.

[0052] In other embodiments, the light shielding member 33 can also have other structures. For example, the grating structure 333 is a groove formed on the substrate 331, or the grating structure 333 is disposed between two substrates 331 and includes a grid-shaped light shielding structure and liquid crystal material filled in the grid. The specific structure of the light shielding member 33 is not limited in this application, as long as the light shielding member 33 can transmit light incident within the first range a and block light incident outside the first range a.

[0053] Please refer to Figure 3 The size of the first range a is less than or equal to 120°. Specifically, the size of the first range a can be any value within the range of 0°-5°, 5°-10°, 10°-15°, 15°-20°, 20°-25°, 25°-30°, 30°-35°, 35°-40°, 40°-45°, 45°-50°, 50°-55°, 55°-60°, 60°-65°, 65°-70°, 70°-75°, 75°-80°, 80°-85°, 85°-90°, 90°-95°, 95°-100°, 100°-105°, 105°-110°, 110°-115°, 115°-120°. The size of the first range a specifically refers to the change in angle from entering the first range a to leaving the first range a, i.e., the size of the first range a refers to the size of the first range itself, not the starting position of the first range a. For example, when the size of the first range a is 60°, the first range a can refer to an angle within the range of 20°-80°, 30°-90° or 60°-120° with respect to the surface of the light shielding member 33, which is not limited in this application.

[0054] In the present embodiment, the median value of the first range a is 90°. That is, the first range a is symmetrical with respect to the normal line N of the light shield 33. Therefore, the angle β between the boundary of the first range a and the normal line N of the light shield 33 is less than or equal to 60°. When the angle between the light ray incident to the light shield 33 and the normal line N of the light shield 33 is less than the angle β, the light ray can be transmitted out of the light shield 33. When the angle between the light ray incident to the light shield 33 and the normal line N of the light shield 33 is greater than the angle β, the light ray is blocked by the light shield 33. The angle β can be any value in the range of 0°-5°, 5°-10°, 10°-15°, 15°-20°, 20°-25°, 25°-30°, 30°-35°, 35°-40°, 40°-45°, 45°-50°, 50°-55°, 55°-60°.

[0055] In other embodiments, the first range a can also not be symmetrical with respect to the normal line N of the light shield 33, and the orientation of the first range a can be adjusted by setting the overall orientation of the microstructures 3331 in the grating structure 331. For example, one boundary of the first range a can be parallel to the normal line N of the light shield 33, and the other boundary of the first range a can form an angle with the normal line N. The present application does not limit the specific angle of the first range a with respect to the light shield 33.

[0056] In the present embodiment, the image light L1 is incident on the light shield 33 along a direction parallel to the normal line N of the light shield 33, that is, the image light L1 is incident perpendicularly to the light shield 33. The image light L1 incident in a direction parallel to the normal line N of the light shield 33 is parallel to the direction of the center of the first range a, that is, the image light L1 is incident on the light shield 33 from the middle angle of the first range a, and therefore the image light L1 can be transmitted out of the light shield 33 to the greatest extent. In other embodiments, the image light L1 can also be incident on the light shield 33 from other angles, and the image light L1 can be incident on the light shield 33 from the middle angle of the first range a or from other directions of the first range a, which is not limited by the present application.

[0057] The angle θ between the light shield 33 and the first mirror 31 is 30°-60°. Specifically, the angle θ can be any value in the range of 30°-35°, 35°-40°, 40°-45°, 45°-50°, 50°-55°, 55°-60°, for example, the angle θ can be 45°. By adjusting the position of the image generation unit 10 with respect to the first mirror 31 and the emission direction of the image light L1, the image light L1 reflected out of the first mirror 31 can be incident perpendicularly on the light shield 33.

[0058] The head-up display device 100 provided by the embodiments of the present application has the first range a by setting the light shielding piece 33, so that the stray light L2 incident from the outside of the head-up display device 100 is located outside the first range a when being incident on the light shielding piece 33, and the part of the stray light L2 is shielded and absorbed by the light shielding piece 33. The part of the stray light L2 located within the first range a passes through the light shielding piece 33 and is incident on the first mirror 31, and since the first mirror 31 and the light shielding piece 33 have the included angle θ, the stray light L2 reflected from the first mirror 31 back to the light shielding piece 33 will be beyond the first range a, and thus is absorbed by the light shielding piece 33 again. Therefore, by setting the light shielding piece 33, most of the stray light L2 incident from the outside is absorbed by the light shielding piece 33, so that the stray light L2 cannot be emitted from the head-up display device 100 again, which is beneficial to reduce the crosstalk of the stray light L2 to the image light L1, thereby improving the quality of image display.

[0059] The diffusion piece 35 is arranged on the side of the light shielding piece 33 away from the first mirror 31. The diffusion piece 35 is arranged in a spaced manner with the light shielding piece 33, and is used for diffusing the image light L1. Specifically, the diffusion piece 35 is used for diffusing and homogenizing the image light L1, thereby improving the imaging effect of the image light L1.

[0060] The diffusion piece 35 is arranged in a spaced manner with the light shielding piece 33. By arranging the light shielding piece 33 between the diffusion piece 35 and the first mirror 31, the image light L1 is diffused and emitted by the diffusion piece 35 after passing through the light shielding piece 33. Specifically, the diffusion of the image light L1 by the diffusion piece 35 is to diffuse and emit the image light L1 to achieve the homogenization effect, and compared with arranging the light shielding piece 33 on the side of the diffusion piece 35 away from the first mirror 31, the diffused image light L1 can be prevented from being partially absorbed by the light shielding piece 33, thereby ensuring the diffusion effect while ensuring the light effect.

[0061] Please refer to Figure 1 , the light guiding module 30 further includes a second mirror 37 and a third mirror 39. The image light L1 emitted from the diffusion piece 35 passes through the second mirror 37 and the third mirror 39 in sequence. Specifically, the second mirror 37 and the third mirror 39 are both concave mirrors, which are used for modulating the image light L1, so that the image light L1 adjusts the size of the image formed by the projection of the image light L1. In other embodiments, the light guiding module 30 can further include other optical elements, such as a plane mirror, a lens or a lens group, which are not limited by the present application.

[0062] The head-up display device 100 provided by the embodiments of the present application can avoid the stray light L2 incident from the outside of the head-up display device 100 from being reflected and emitted from the head-up display device 100, thereby avoiding the influence on the image light L1. By arranging the light shielding member 33 between the first reflector 31 and the diffusion member 35, the light shielding member 33 can avoid affecting the diffusion effect of the diffusion member 35, which is conducive to ensuring the light utilization rate. Moreover, the light shielding member 33 is simple to arrange and can be directly added to the process of the existing head-up display device, without the need to increase too many processes, without increasing the volume of the head-up display device 100, and without affecting the light path of the image light L1 in the head-up display device 100, thus being conducive to ensuring the imaging effect of the head-up display device 100.

[0063] Please refer to Figure 4 The embodiments of the present application also provide a vehicle 200, which comprises a dashboard cover 210, a windshield 230 and the head-up display device 100 in the above embodiments. The head-up display device 100 is arranged in the inside of the dashboard cover 210, the image light L1 emitted by the head-up display device 100 is projected on the windshield 230 and reflected to the eyes of the user, thereby forming a virtual image E with image information.

[0064] Specifically, the vehicle 200 can be any one of an electric vehicle, a gasoline vehicle and a diesel vehicle, which is not limited by the present application. The material of the windshield 230 can be glass or synthetic resin with light transmission. The head-up display device 100 uses the principle of optical reflection to project important driving-related information (such as driving speed, battery voltage, water tank temperature, engine speed, fuel consumption, navigation route, etc.) on the windshield 230, so as to be reflected from the windshield 230 into the eyes of the user, thereby assisting the user to drive the vehicle 200, avoiding the user from looking down to the dashboard during driving and being distracted, improving the driving safety factor, and also bringing a better driving experience.

[0065] In other embodiments, the vehicle 200 can also comprise an imaging medium (not shown in the figure) arranged on the dashboard cover 210, which is used to receive the image light L1 emitted by the head-up display device 100 and reflect the image light L1 to the eyes of the user. That is, the imaging medium is a component arranged independently with respect to the windshield 230, and the image light L1 can be projected only on the imaging medium to form an image, or can be projected on the imaging medium and the windshield 230 at the same time, thereby forming multiple virtual images E at different positions, which is not limited by the present application.

[0066] The vehicle 200 provided by the embodiments of the present application is provided with the head-up display device 100 in the above embodiments, so that the image light L1 emitted by the image generating unit 10 can be projected onto the windshield 230 and incident into the eyes of the user to form a virtual image E in the air. The stray light L2 incident into the head-up display device 100 from the outside of the vehicle 200 through the windshield 230 can be blocked and absorbed by the light shielding piece 33 in the head-up display device 100, so that the stray light L2 cannot be reflected and emitted from the head-up display device 100, and thus the stray light L2 cannot be incident into the eyes of the user through the windshield 230, so that the interference of the stray light L2 on the image light L1 can be avoided, and the quality of the image displayed by the head-up display device 100 can be ensured. Meanwhile, the light shielding piece 33 is simple in structure and does not affect the size of the head-up display device 100, so that the assembly of the head-up display device 100 and the vehicle 200 can not be affected, and additional processes can be avoided, and the production cost can be reduced.

[0067] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present application, but not used as limitation to the present application, and any modification and change made to the above embodiments within the scope of the spirit of the present application shall fall within the scope of the present application.

Claims

1. A head-up display device, characterized in that, include: Image generation unit, used to emit image light; The light guiding module includes a first reflector, a light shield, and a diffuser; The first reflector, the light-shielding member, and the diffuser are sequentially disposed on the optical path of the image light, with the first reflector disposed on the side closer to the image generation unit; The light-shielding member is used to transmit light whose incident direction and the surface of the light-shielding member are within a first range, and to block light whose incident direction and the surface of the light-shielding member are outside the first range, wherein the angle between the image light incident on the light-shielding member and the surface of the light-shielding member is within the first range.

2. The head-up display device as claimed in claim 1, characterized in that, The surface of the light-shielding component is provided with a grating structure.

3. The head-up display device as described in claim 1, characterized in that, The angle between the light-shielding component and the first reflector is 30°-60°.

4. The head-up display device as claimed in claim 1, characterized in that, The size of the first range is less than or equal to 120°.

5. The head-up display device as described in claim 4, characterized in that, The median of the first range is 90°.

6. The head-up display device as claimed in claim 5, characterized in that, The image light is incident on the light-shielding member along a direction parallel to the normal of the light-shielding member.

7. The head-up display device as claimed in claim 1, characterized in that, The light guiding module further includes a second reflector and a third reflector, and the image light emitted from the diffuser passes through the second reflector and the third reflector in sequence.

8. The head-up display device as claimed in claim 7, characterized in that, The second reflecting mirror is a concave mirror, and the third reflecting mirror is a concave mirror.

9. The head-up display device as claimed in claim 1, characterized in that, The light-shielding element and the diffuser element are spaced apart.

10. A vehicle, characterized in that, It includes at least an instrument panel cover, a windshield, and a head-up display as described in any one of claims 1-9; The head-up display is installed inside the dashboard housing, and the image light emitted by the head-up display is projected onto the windshield to form image information.

Images