Augmented reality optical imaging device for night driving

Abstract

The utility model discloses an augmented reality optical imaging device for night driving. The augmented reality optical imaging device structurally comprises an information acquisition module, a source image display module, an optical imaging module and a windshield, the information acquisition module transmits acquired road condition information to the source image display module, and the source image display module projects the identified road condition information to a windshield through the optical imaging module to form a virtual image; wherein the optical imaging module comprises a reflector and a beam splitter prism, the reflector is used for reflecting road condition information recognized by the source image display module to the beam splitter prism, and the beam splitter prism is used for projecting the road condition information into a designated area of a windshield. The utility model aims to project information on two sides of a night road to two sides of a windshield so as to assist in improving the safety of night driving.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of automobile head-up display technology, more particularly to an augmented reality optical imaging device for night driving. BACKGROUND

[0002] When driving at night, it is difficult for the driver to obtain information on both sides of the road due to insufficient ambient light. In this case, the driver has difficulty in responding quickly when encountering an emergency situation, and is prone to visual fatigue when observing the road conditions for a long time, thereby affecting driving safety. However, the existing vehicle-mounted head-up display system (Head up Display, HUD) mainly projects the car instrument panel information and navigation information in front of the driver's line of sight. Although this can reduce the frequency of the driver looking down to check the instrument panel to some extent, this design cannot well combine virtual information with the real world to provide more intuitive and effective auxiliary information.

[0003] Currently, research on head-up display systems mainly focuses on traditional windshield HUDs, while research on augmented reality HUDs is relatively less. Some solutions proposed in existing literature often focus on the projection effect in a single picture or specific scene, and lack adaptability to complex and variable night driving environments. In addition, the AR-HUD systems studied do not have a large field of view, resulting in a small projected picture size and providing less information to the driver.

[0004] Therefore, it is particularly important to develop a new optical imaging device suitable for night driving and capable of providing more driving assistance information. SUMMARY

[0005] To solve the above problems, the present application provides an augmented reality optical imaging device for night driving, which aims to project the information on both sides of the road at night to the windshield to assist in improving the safety of night driving.

[0006] To achieve the above purpose, the utility model adopts the following technical scheme:

[0007] An augmented reality optical imaging device for night driving includes an information acquisition module, a source image display module, an optical imaging module, and a windshield. The information acquisition module transmits the collected road condition information to the source image display module. The source image display module projects the recognized road condition information to the windshield through the optical imaging module to form a virtual image.

[0008] The optical imaging module includes a mirror and a light splitting prism. The mirror is used to reflect the road condition information recognized by the source image display module to the light splitting prism. The light splitting prism is used to project the road condition information into a specified area of the windshield.

[0009] Further, the information collection modules are two, respectively installed on the two sides of the vehicle body, used for collecting the information on the two sides of the road, and each information collection module corresponds to a source image display module.

[0010] Further, the information collection module is a low-illumination image sensor or a low-illumination infrared receiving device, preferably IMX307LQD-C, used for ensuring clear imaging in low-illumination environment.

[0011] Further, the image sensor or low-illumination infrared receiving device is installed on the A-pillar on the front of the vehicle.

[0012] Further, the reflector includes a first reflector and a second reflector, and the first reflector and the second reflector are free-form mirrors.

[0013] The design of the free-form mirror and the light splitting prism can make the projected picture size larger, so as to cover a wider field of view and provide more driving assistance information.

[0014] Further, the first reflector and the second reflector are both curved towards the light splitting prism, which helps to focus light and improve the clarity and brightness of the image, so as to ensure good display effect even in low-light conditions.

[0015] Further, the light splitting prism has intersecting symmetrical inclined surfaces, and the inclined surfaces are used for projecting the road condition information reflected by the reflector to the left side or the right side of the windshield.

[0016] Further, the light splitting prism has a plane and two inclined surfaces symmetrical about the plane, the inclined surfaces are used for projecting the road condition information reflected by the reflector to the left side or the right side of the windshield, and the plane is used for projecting the instrument panel / navigation information to the middle part of the windshield.

[0017] The light splitting prism can realize reasonable layout of the projection area, avoid blocking the normal line of sight of the driver, and ensure the effectiveness and readability of the display content.

[0018] Further, a third source image display module is provided, used for obtaining the instrument panel / navigation information and reflecting the information to the plane in the light splitting prism through the reflector.

[0019] In addition to displaying the information on the two sides of the road, the new type can also obtain the instrument panel / navigation information through the third source image display module and reflect the information to the specific plane in the light splitting prism through the reflector, so as to realize integrated display of multiple information and make the driver easily and clearly master the vehicle state and driving route.

[0020] The augmented reality optical imaging device for night driving provided by the utility model has the following advantages compared with the prior art:

[0021] (1)Enhance night driving safety: by projecting the key information on both sides of the road (such as pedestrians, vehicles, obstacles, etc.) to the virtual image position on both sides of the windshield, the driver can more intuitively obtain these information, master the road conditions to quickly respond in emergency situations, and improve the safety of night driving;

[0022] (2)Reduce visual fatigue: since the device projects important information within the driver's field of view, the need for the driver to observe the actual road for a long time, and the visual fatigue caused by frequent switching of the line of sight, is reduced, thereby improving driving comfort.

[0023] The present application is optimized for complex and variable driving environment at night, can work stably under various lighting conditions, and provide clear image display. Compared with the traditional HUD system, the present application can provide more types of driving assistance information and present them to the driver in a more intuitive way. The imaging device provided by the present application has a simple and compact structure, is easy to install in the car interior, and is easy to maintain. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description are only a part of the embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor on the basis of the provided drawings.

[0025] Figure 1 The accompanying drawings are structural schematic diagrams of the augmented reality optical imaging device for night driving provided by the present application;

[0026] Figure 2 The accompanying drawings are structural schematic diagrams of the augmented reality optical imaging device for night driving provided by the present application;

[0027] Figure 3 The accompanying drawings are structural schematic diagrams of the augmented reality optical imaging device for night driving provided by the present application; DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be described in detail below with reference to the drawings of the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0029] The utility model discloses an enhanced reality optical imaging device for night driving, through the projection information of current head-up display system is changed into night information, and the virtual image position is projected to the road both sides of insufficient illumination condition, one aspect will not influence the road condition observation on the road surface, another aspect can be combined with the real road well, realizes the effect of augmented reality, and effectively promotes the safety factor of night driving.

[0030] Referring to Figure 1 , including information acquisition module 1, source image display module 2, optical imaging module 3 and windshield 4;Information acquisition module 1 is transmitted to the road condition information of the collection to source image display module 2, and source image display module 2 is projected to the windshield 4 by the optical imaging module 3 to the road condition information of the identification, and the windshield 4 receives information reflection to the eye of person, and then the eye of person is observed to the enlarged night information virtual image of the road both sides formed outside the windshield 4 of car by the reverse tracing to light path;

[0031] The optical imaging module in the embodiment includes reflector and light splitting prism, and the reflector is used to reflect the road condition information of the identification of source image display module 2 to the light splitting prism, and the light splitting prism is used to project the road condition information to the specified area in the windshield 4.In the application, the light splitting prism can split and turn the original light path, so that the night information can be projected to the both sides of the windshield 4.

[0032] In an embodiment, the information acquisition module has two, and is installed on the both sides of the vehicle body respectively, is used to gather the information of the both sides of the road, and the first information acquisition module corresponds to source image display module 21, and the second information acquisition module corresponds to source image display module 22.

[0033] In the embodiment, for the information acquisition module, the left and right double lens shooting mode is adopted to gather the information of the both sides of the road.The designed lens needs to shoot in low illumination environment, and the radiation of near-infrared light is greater than that of visible light, and the near-infrared light can be clearly imaged.Therefore, SONY IMX307 starlight level COMS image sensor is selected, and the sensor has enhanced response to near-infrared waveband, and can realize continuous clear imaging under 1*10-3lx ultra-low illumination environment.

[0034] Further, in the present application, the image sensor is installed on the A-pillar in front of the automobile, and according to the general height of the vehicle (1.4m-1.6m), the installation height of the image sensor is selected as 1.5m, so as not to block the view of the driver, while reducing the blind area caused by the A-pillar, and in order not to waste the vertical field of view, the two cameras (sensors) are inclined downward by 3.3°. It should be noted that the present application does not limit the way in which the image sensor is installed on the A-pillar in front of the automobile, and can be installed by adhesion, punching, or built-in, etc. according to actual needs, since there is no technical difficulty at this point, and therefore, it will not be described in detail.

[0035] According to the embodiments of the present application, the image sensor can also be installed on the rearview mirror on both sides of the automobile, or other positions around the vehicle body, as long as the required information can be collected.

[0036] In one embodiment, referring to Figure 2 , Figure 2 the internal structure of the optical imaging module 3 is shown;

[0037] Specifically, in the present embodiment, the optical imaging module 3 includes a mirror and a light splitting prism, wherein the mirror includes a first mirror 31 and a second mirror 32; the first mirror 31 and the second mirror 32 are free-form mirrors and are curved towards the light splitting prism 33, so as to correct the off-axis aberration, tilt angle, and asymmetric high-order aberration in the optical system.

[0038] Further, the light splitting prism 33 has intersecting symmetrical inclined surfaces, which are used to project the road condition information reflected by the mirror to the left or right side of the windshield. The intersection of the inclined surfaces can block the area of the middle field of view that is overexposed due to the opening of the headlamp at night. It should be noted that, as Figure 2 , the cross section of the light splitting prism 33 in the present application is pentagonal, and the light can enter from the bottom plane of the prism and exit through the inclined surfaces; and in the present embodiment, the included angle formed by the two inclined surfaces faces the side of the mirror, so as to meet the projection requirements of the left and right sides at the same time.

[0039] During imaging, the first mirror 31 first reflects the night information projected by the source image display module 21 and the source image display module 22, and then the second mirror 32 reflects the night information to the light splitting prism 33, and finally the light splitting prism 33 splits and turns the night information, and then reflects it to the windshield 4 of the automobile. After being reflected by the windshield 4 of the automobile, the driver can observe the virtual images of the two night information imaged on both sides of the road.

[0040] In another embodiment, referring to Figure 3 , Figure 3Another prism shape is shown in the middle, that is, the light splitting prism 33 has a plane and two inclined planes symmetrical about the plane, and in the present application, the two inclined planes are respectively connected to the opposite sides of the plane; the inclined planes are used to project the road condition information reflected by the mirror to the left or right side of the windshield, and the plane is used to project the instrument panel / navigation information to the middle of the windshield. Figure 3 In the embodiment, the cross section of the light splitting prism 33 is hexagonal like an isosceles trapezoid.

[0041] At this time, the optical imaging device corresponds to the third source image display module 23, which is used to acquire the instrument panel / navigation information and reflect it to the plane in the light splitting prism through the mirror.

[0042] Compared with the prior art, the present application adopts a double-sided information acquisition module, which can simultaneously collect information on both sides of the road, while the existing head-up display system mainly focuses on the projection effect of a single picture or a specific scene. Secondly, the optical imaging module of the present application is designed uniquely, including a free-form mirror and a light splitting prism with a specific inclined plane, which can effectively project information to the specified area of the windshield; thirdly, the present application processes the instrument panel / navigation information through the third source image display module and projects it to the middle of the windshield, while combining the road information on both sides, to provide users with a more comprehensive augmented reality experience.

[0043] In summary, the design of the present application takes into account the complex and variable night driving environment, and provides more flexible and adaptive driving assistance information, which not only improves the safety and comfort of driving, but also enhances the driving experience of users, while the existing technical solutions often lack such adaptability.

[0044] The embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple, and the related parts can be referred to the method part.

[0045] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to the embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An augmented reality optical imaging device for night driving, characterized in that, The information acquisition module transmits the collected road condition information to the source image display module, and the source image display module projects the recognized road condition information to the windshield through the optical imaging module to form a virtual image. The optical imaging module includes a mirror and a light splitting prism, the mirror is used for reflecting the road condition information recognized by the source image display module to the light splitting prism, and the light splitting prism is used for projecting the road condition information to a specified area of the windshield.

2. The optical imaging device of claim 1, wherein, The information acquisition module has two, which are respectively installed on both sides of the vehicle body and are used for collecting information on both sides of the road, and each information acquisition module corresponds to a source image display module.

3. The optical imaging device of claim 1, wherein, The information acquisition module is a low-illumination image sensor or a low-illumination infrared receiving device.

4. The optical imaging device of claim 3, wherein, The image sensor or the low-illumination infrared receiving device is installed on the A-pillar at the front of the vehicle.

5. The optical imaging device of claim 1, wherein, The mirror includes a first mirror and a second mirror, and the first mirror and the second mirror are free-form mirrors.

6. The optical imaging device of claim 5, wherein, The first mirror and the second mirror are both curved towards the light splitting prism.

7. The optical imaging device of claim 1, wherein, The light splitting prism has intersecting symmetrical inclined surfaces, and the inclined surfaces are used for projecting the road condition information reflected by the mirror to the left side or the right side of the windshield.

8. The optical imaging device of claim 1, wherein, The light splitting prism has a plane and two symmetrical inclined surfaces about the plane, the inclined surfaces are used for projecting the road condition information reflected by the mirror to the left side or the right side of the windshield, and the plane is used for projecting the instrument panel / navigation information to the middle part of the windshield.

9. The optical imaging device of claim 8, wherein, A third source image display module is arranged to obtain the instrument panel / navigation information and reflect the information to the plane of the light splitting prism through the mirror. The information acquisition module has two, which are respectively installed on both sides of the vehicle body and are used for collecting information on both sides of the road, and each information acquisition module corresponds to a source image display module.

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