WO2019062269A1 - Rear-view mirror, in-vehicle display system, and driving equipment - Google Patents

Abstract

The present disclosure relates to the technical field of in-vehicle rear-vision, and provides a rear-view mirror, in-vehicle display system, and driving apparatus, used to solve the problem in the prior art in which a driver cannot see clearly in a rear-view mirror when visibility is poor. The rear-view mirror of the present disclosure is provided with an infrared thermal imaging system in a half-mirror rear surface thereof. At night, or in rain or snow, the infrared thermal imaging system can capture infrared light from surrounding objects to generate images of near and distant road conditions and environment. Rear vision based on infrared thermal imaging is not influenced by poor weather conditions or visibility, and provides clear infrared images at night or in poor visibility, thus improving safety of a driving apparatus at night or in rain or snow. The rear-view mirror of the present disclosure is applicable to all kinds of driving apparatuses.

Description

Rear view mirror, vehicle display system and driving equipment Technical field

The present disclosure relates to the field of vehicle rear view technology, and in particular, to a rear view mirror, an in-vehicle display system, and a driving device.

Background technique

When driving at night, the road environment is very dark. Although the car has front and rear headlights, it is difficult to clearly observe the rear and surrounding conditions through the rearview mirror during the overtaking or reversing of the driver and passenger. In order to improve the safety of driving, the prior art uses a reversing image technology in which a camera is mounted at a position such as the rear of the vehicle, and the contents of the rear and surrounding images are displayed on the center console in the vehicle.

Public content

The present disclosure provides a rear view mirror, an in-vehicle display system, and a driving device.

The present disclosure relates to a rearview mirror comprising:

Semi-transparent mirror for reflecting visible light and transmitting infrared light;

An infrared thermal imaging system, the infrared thermal imaging system is disposed on a side of the transflective mirror away from the light incident surface for capturing and processing infrared light from an image source on a side of the light incident surface of the transflective mirror Light information to form an image.

Optionally, the infrared thermal imaging system comprises:

An infrared detector for capturing infrared light information from the image source;

An infrared thermal imager coupled to the infrared detector for processing infrared light information from the infrared detector to form an image.

Optionally, the half mirror comprises a substrate and a transflective film disposed on the substrate, the transflective film reflecting light with a wavelength of 380 nm to 780 nm and infrared light having a wavelength of 8 to 14 μm. transmission.

Optionally, the transflective film comprises a plurality of high refractive film layers and a low refractive film layer

Alternatingly stacked, the high refractive film layer has a refractive index greater than the low refractive film

The refractive index of the layer.

Optionally, the high refractive film layer material is PbTe, and the low refractive film layer material is ZnS; the high refractive film layer and the low refractive film layer have a thickness of 0.25 mm.

Optionally, the substrate is made of a germanium (Ge) material.

Optionally, the method further includes a rear case disposed on a side of the half mirror that is away from the light incident surface, the rear case being fixed to the edge of the half mirror and forming a cavity with the half mirror The infrared thermal imaging system is disposed in the chamber.

Optionally, the infrared detector includes an infrared thermal imaging lens that optimizes infrared light information from the image source, and the infrared thermal imager includes an infrared image sensing unit that processes the infrared heat Imaging lens optimized infrared light information.

The present disclosure also discloses an in-vehicle display system including a display device and the above-described rearview mirror for presenting an image formed by an infrared thermal imaging system of the rearview mirror.

Optionally, the display device comprises a central control display connected to the rear view mirror for presenting an image formed by the infrared thermal imaging system.

The present disclosure also discloses a driving device including the above-described in-vehicle display system.

Optionally, the driving device further comprises a front windshield, and the display device comprises a head-up display device for presenting an image formed by the infrared thermal imaging system on the front windshield.

The rearview mirror of the present disclosure is provided with an infrared thermal imaging system on the back side of the half mirror, and the infrared thermal imaging system can capture the heat source radiated by the surrounding objects at night and in the rain and snow conditions, thereby being close to and far away. Imaging in the road environment; that is, infrared thermal imaging for rear view is not affected by bad weather and low visibility. The rear view mirror can display clear infrared images at night or when visibility is low, and improve driving at night, rain and snow. The security of the device travel. The rear view mirror of the present disclosure is applicable to various driving devices.

DRAWINGS

1 is a schematic structural view of a rear view mirror according to an embodiment of the present disclosure;

2-4 is a schematic structural view of a rear view mirror according to an embodiment of the present disclosure;

FIG. 5 is a schematic structural diagram of a driving apparatus according to an embodiment of the present disclosure; FIG.

Wherein, the reference numerals are: 1, infrared thermal imaging system; 11, infrared detector; 12, infrared thermal imager; 2, semi-transparent mirror; 21, substrate; 22, semi-transparent film; Refractive film layer; 222, low refractive film layer; 3, back shell; 4, connecting portion; 5, head-up display device; 6, front windshield.

Detailed ways

The present disclosure will be further described in detail below in conjunction with the drawings and specific embodiments.

In the description of the present disclosure, it should be noted that the orientation or positional relationship of the terms "upper", "lower", "front", "back", "left", "right", etc. is based on the drawings. The orientation or positional relationship is merely for the convenience of the description of the disclosure and the simplification of the disclosure, and is not intended to be a limitation or a limitation of the invention.

One embodiment of the present disclosure provides a rearview mirror, as shown in FIG. 1, including a half mirror 2 and an infrared thermal imaging system 1; the light incident surface of the half mirror 2 is front, and the other is One side is the back side, and the infrared thermal imaging system 1 is disposed on the back surface of the half mirror 2, wherein the half mirror 2 can reflect visible light and transmit infrared light; the infrared thermal imaging system 1 is used for capturing and processing the transflective The infrared light information from the image source on the side of the mirror 2 is formed on the light side to form an image.

In Fig. 1 corresponding to the present embodiment, it is shown that the right side of the half mirror 2 is a light incident surface, that is, a front surface, and the infrared thermal imaging system 1 is disposed on the left side (ie, the back side) of the half mirror 2 .

The rearview mirror of the present embodiment is provided with an infrared thermal imaging system 1 on the back side of the half mirror 2, and the infrared thermal imaging system 1 can capture infrared light from surrounding objects at night and under rain and snow conditions, thereby being close to Imaging at a remote and remote road environment. Compared with the prior art adopting the reversing image technology, the following problems can be overcome in the prior art: in the case of encountering bad weather and having a relatively low visibility, on the one hand, the environment itself has line of sight interference, and on the other hand, the reversing image technology The medium camera has a limited field of view, which is difficult to play. That is to say, the method of adopting infrared thermal imaging for rear view in this embodiment is not affected by bad weather and low visibility, and the rear view mirror can display clear infrared images at night or when the visibility is low, and improve driving equipment at night, rain and snow. Travel safety.

Another embodiment of the present disclosure provides a rear view mirror, as shown in FIG. 2, including a half mirror 2 and an infrared thermal imaging system 1; the light incident surface of the half mirror 2 is front, and the other is One side is the back side, and the infrared thermal imaging system 1 is disposed on the back surface of the half mirror 2, wherein the half mirror 2 can reflect visible light and transmit infrared light; the infrared thermal imaging system 1 includes an infrared detector 11 and infrared thermal imaging. The infrared detector 11 is configured to capture infrared light information from the image source; the infrared thermal imager 12 is coupled to the infrared detector 11 for processing infrared light information from the infrared detector 11 to form an image .

In the infrared thermal imaging system 1 of the present embodiment, the infrared light detector 11 is used to capture infrared light information from the image source, and the infrared thermal imager 12 is used to process infrared light information from the infrared detector 11 to form an image. Specifically, the infrared detector 11 receives the infrared radiation signal incident by the half mirror 2 and converts it into an electrical signal output to the infrared thermal imager 12. The infrared detector 11 can infrared capture and scan the condition of an object such as road conditions in the environment, and the infrared thermal imager 12 is connected to the infrared detector 11. Using the optical imaging objective, the infrared detector 11 receives the condition of an object target such as road conditions in the environment. The infrared light from the image source is reflected on the photosensitive element of the infrared detector 11 in the form of an infrared radiation energy distribution pattern, and the infrared thermal imager 12 processes the infrared light information to obtain an infrared thermal image. This thermal image corresponds to the thermal distribution field on the surface of the target object such as the road conditions in the environment.

Optionally, the infrared detector 11 includes an infrared thermal imaging lens that optimizes infrared light information from the image source, and the infrared thermal imager 12 includes an infrared image sensing unit that processes through the infrared Thermal imaging lens optimized for infrared light information. The "optimization" here may be to concentrate the infrared light of the image source by optical focusing to maintain the accuracy of the infrared light information (ie, to ensure that the infrared light information captured by the infrared detector 11 can accurately correspond to the heat distribution of the surface of the image source object. field).

Optionally, as shown in FIG. 2 , the rear view mirror may further include a rear case 3 disposed on a side of the half mirror 2 away from the light incident surface, and the rear case 3 is fixed to the half mirror 2 . The edge and the half mirror 2 form an inner hollow chamber, and the infrared thermal imaging system 1 is disposed in the chamber.

As can be seen in conjunction with FIG. 3, the edge of the rear case 3 and the half mirror 2 enclose a closed space, and the infrared thermal imaging system 1 is disposed in the sealed space, so that when the rear view mirror is in the rain and snow, In the weather, the rear case 3 can function to protect the infrared thermal imaging system 1. Therefore, the problem that the camera in the prior art is easy to accumulate during use, thereby affecting the effect of shooting and imaging, is solved. It should be noted that, as shown in FIG. 3, the rear case 3 has a connecting portion 4 for connecting the half mirror 2 to the driving device.

Optionally, the half mirror 2 comprises a substrate 21 and a transflective film 22 disposed on the substrate 21. The transflective film 22 reflects visible light with a wavelength of 380 nm to 780 nm and has a wavelength of 8 ~14μm infrared light transmission. The half mirror 2 is provided with one side of the transflective film 22 as a light incident side, and is respectively reflected by visible light in a specific wavelength range and transmitted to infrared light.

That is, the half mirror 2 is attached with a semi-transparent film 22 on the substrate 21 having a smooth plane, and the transflective film 22 can reflect visible light so that infrared light is transmitted. Among them, the near-infrared band is usually 1 to 3 μm; the mid-infrared band is 3 to 5 μm; and the far-infrared band is 8 to 14 μm. The infrared referred to in the present disclosure generally refers to infrared light having a wavelength of 8 to 14 μm. It can be understood that the transflective film 22 corresponding to the range of the wavelength band is selected, and the transflective film 22 is attached to the substrate 21 having a smooth plane.

Optionally, the transflective film 22 is formed by alternately stacking a plurality of high refractive film layers 221 and a plurality of low refractive film layers 222. The high refractive film layer 221 is made of PbTe, and the low refractive film layer. The material of 222 is ZnS; the thickness of the high refractive film layer 221 and the low refractive film layer 222 is 0.25 mm.

As shown in FIG. 4, the transflective film 22 is formed on the substrate 21, and the transflective film 22 is composed of five layers of different refractive indices, wherein the thicknesses of the top five layers in FIG. 4 are both It is 0.25mm; the materials from the top to the bottom five layers are: PbTe, ZnS, PbTe, ZnS, PbTe; the refractive indices from the top to the bottom five layers are: 5.6, 2.35, 5.6, 2.35, 5.6 .

Optionally, the substrate 21 is made of a germanium (Ge) material.

The reason why the tantalum material is used as the base material is because the tantalum material has high transmittance in the infrared band and stable physical and chemical properties.

It will be understood that the size, thickness, and the like of the various structural layers shown in the drawings are merely illustrative. In a specific product implementation, the size and proportional relationship of each structural layer may be the same as or different from the drawings, and the structure shown in the drawings does not limit the geometric shape of each structural layer. For example, the rear case 3 may be in the drawings. The hemisphere shown may also be other shapes.

The present disclosure also provides an in-vehicle display system including a display device and the above-described rearview mirror.

In the embodiment, the clear infrared image presented by the rearview mirror is synchronously displayed by the display device, that is, the display device receives the infrared image source information of the rearview mirror, so that when the driver uses the driving device, the driver can watch through the display device. Infrared image content into the rearview mirror.

Optionally, the display device includes a central control display, and the central control display is connected to the rear view mirror. The connection manner may be, for example, an electrical connection or a wireless communication connection for presenting an image formed by the infrared thermal imaging system.

That is to say, the display device in this embodiment is a central control display screen in the cab, that is, the rear view mirror is connected with the central control display screen in the cab, and the infrared image source information is displayed through the central control display screen. The central control display can also be connected with the console of the driving device to simultaneously display the driving information of the driving device, such as the speed of the vehicle, navigation, map path and the like.

The display device in the present embodiment may be the above-mentioned central control display screen, or may be a device for presenting an image such as a projection device.

The present disclosure also provides a driving apparatus including the in-vehicle display system of the above embodiment.

Specifically, the display device is disposed in a cab of the driving device, and the rear view mirror is disposed outside the cab of the driving device. Usually, the rear view mirror is provided on each of the left and right sides of the cab. When used in good weather during daytime driving, the rear view mirror with a half-reverse lens of the present disclosure is no different from the ordinary driving equipment rearview mirror, and the driver views the rearview mirror by reflected light. When the vehicle is driving at night or in rain or snow, the infrared thermal imaging system is turned on, and the road condition information around the vehicle body can be displayed in real time.

The driving device in the embodiment may be a motor vehicle such as a car, a motorcycle, or a tram, or a non-motor vehicle, or may be a driving device such as a motorboat or a fast boat. That is to say, the rear view mirror in the above embodiment can be applied to various driving devices, and will not be mentioned here.

Alternatively, referring to FIG. 5, the driving device further includes a front windshield 6 for presenting an image formed by the infrared thermal imaging system 1 on the front windshield 6.

In the corresponding FIG. 5 corresponding to the embodiment, the clear infrared image presented by the rearview mirror is synchronously displayed by the head-up display device 5, that is, the head-up display device 5 receives the infrared image source information of the rearview mirror, so that when it is used When driving the device, the driver does not need to shift the line of sight, and the content of the infrared image in the rearview mirror can be understood through the content displayed on the front windshield 6, thereby further improving driving safety.

It is to be understood that the above embodiments are merely exemplary embodiments employed to explain the principles of the present disclosure, but the present disclosure is not limited thereto. Various modifications and improvements can be made by those skilled in the art without departing from the spirit and scope of the disclosure, and such modifications and improvements are also considered to be within the scope of the disclosure.

Claims (12)

A rearview mirror comprising: Semi-transparent mirror for reflecting visible light and transmitting infrared light; An infrared thermal imaging system, the infrared thermal imaging system is disposed on a side of the transflective mirror away from the light incident surface for capturing and processing infrared light from an image source on a side of the light incident surface of the transflective mirror Light information to form an image. The rear view mirror of claim 1 wherein said infrared thermal imaging system comprises: An infrared detector for capturing infrared light information from the image source; An infrared thermal imager coupled to the infrared detector for processing infrared light information from the infrared detector to form an image. The rear view mirror according to claim 1, wherein the half mirror comprises a substrate and a transflective film disposed on the substrate, the transflective film reflecting visible light having a wavelength of 380 nm to 780 nm, Transmission of infrared light with a wavelength of 8 to 14 μm. The rear view mirror according to claim 3, wherein the transflective film is formed by alternately stacking a plurality of high refractive film layers and a low refractive film layer, and a refractive index of the high refractive film layer is greater than the low The refractive index of the refractive film layer. The rear view mirror according to claim 4, wherein the high refractive film layer material is PbTe, the low refractive film layer material is ZnS; and the high refractive film layer and the low refractive film layer have a thickness of 0.25 mm. . The rear view mirror according to claim 3, wherein the substrate is made of a tantalum material. The rear view mirror according to claim 1, further comprising a rear case disposed on a side of the half mirror away from the light incident surface, the rear case being fixed to an edge of the half mirror And forming a cavity chamber with the half mirror, the infrared thermal imaging system being disposed in the chamber. The rear view mirror of claim 2 wherein said infrared detector comprises an infrared thermal imaging lens that optimizes infrared light information from said image source, and wherein said infrared thermal imager comprises an infrared image sensing unit And processing infrared light information optimized by the infrared thermal imaging lens. An in-vehicle display system comprising a display device and the rearview mirror of any of claims 1-8 for presenting an image formed by an infrared thermal imaging system of the rearview mirror. The in-vehicle display system of claim 9, wherein the display device comprises a central control display coupled to the rear view mirror for presenting an image formed by the infrared thermal imaging system. A driving apparatus comprising the in-vehicle display system of claim 9 or 10. A driving apparatus according to claim 11, wherein said driving apparatus further comprises a front windshield, said display means comprising head-up display means for presenting an image formed by the infrared thermal imaging system on said front windshield on.

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