Automobile inside rear-view mirror with image acquisition function

Abstract

The utility model provides an automobile inside rear-view mirror with an image acquisition function, which comprises a rear-view mirror shell and an image acquisition device, a rear-view mirror lens is mounted on the front side of the rear-view mirror shell, a transition plate is mounted on the front side of the rear-view mirror shell, the rear-view mirror lens is fixed on the front side of the transition plate, and the image acquisition device is arranged in the rear-view mirror shell. An infrared light source is further installed in the rearview mirror shell, and a light filtering part is arranged between the infrared light source and the back face of the rearview mirror lens. A first receding hole is formed between the transition plate and the infrared light source, and a second receding hole is formed in the position, opposite to the image collector, of the transition plate. The image collector is integrated in the shell of the rearview mirror, the image collector can collect images in a compartment through the rearview mirror lens, the infrared light source is installed in the shell of the rearview mirror, and the infrared light source irradiates the interior of the compartment through the light filtering part and the rearview mirror lens to play a good light supplementing role. Therefore, the image collector can be ensured to collect clear images in the carriage even in the dark.

Description

Technical Field

[0001] The utility model relates to the technical field of automotive rearview mirrors, in particular to an in-vehicle rearview mirror with an image acquisition function. Background Art

[0002] In recent years, with the vigorous development of the automotive industry, vehicle active safety and passive safety have become issues of common concern.

[0003] According to data statistics, 10% to 25% of traffic accidents are caused by fatigue driving or driver distraction. This phenomenon can be improved by arranging a driver monitoring system on the vehicle. However, the image collectors of current driver detection systems are usually independently arranged on the A-pillar on the driver's side. The shapes and sizes of the A-pillars of different vehicle models are different. Therefore, the A-pillar decorative covers for accommodating image sensors, etc. need to be separately molded for each vehicle model, which increases the production cost. In recent years, tragic events caused by children being left unattended in vehicles have occurred frequently. The function of detecting children left in the vehicle (cabin monitoring function) has also become an important part that cannot be ignored in vehicle safety. In addition, in the case of no auxiliary light source at night or in other poor light conditions, ordinary image collectors cannot capture images. Summary of the Utility Model

[0004] To solve the above problems, the purpose of the utility model is to provide an in-vehicle rearview mirror with an image acquisition function.

[0005] The utility model is realized by the following method: An in-vehicle rearview mirror with an image acquisition function includes a rearview mirror housing and an image collector. A rearview mirror lens is installed on the front surface of the rearview mirror housing. A transition plate is installed on the front surface of the rearview mirror housing. The rearview mirror lens is fixed on the front surface of the transition plate. The image collector is arranged inside the rearview mirror housing. An infrared light source is also installed inside the rearview mirror housing. A light filtering part is provided between the infrared light source and the back surface of the rearview mirror lens. A first relief hole is provided between the transition plate and the infrared light source. A second relief hole is provided at a position on the transition plate opposite to the image collector.

[0006] Preferably, the light filtering part is a light filtering coating, and the light filtering coating is coated on the mirror surface of the rearview mirror lens opposite to the first relief hole; or, the light filtering part is a light filtering sheet, and the light filtering sheet is clamped between the transition plate and the rearview mirror lens, and the light filtering sheet covers the first relief hole opposite to the infrared light source.

[0007] Preferably, the visible light transmittance of the rearview mirror lens is not less than 30%, and the infrared light transmittance of the rearview mirror lens is not less than 50%.

[0008] Preferably, the visible light transmittance is greater than 0% and less than or equal to 30% after the filter or the filter coating is superimposed on the rear-view lens; the infrared light transmittance is greater than or equal to 50% after the filter or the filter coating is superimposed on the rear-view lens.

[0009] Preferably, there are multiple infrared light sources, and correspondingly, there are multiple first relief holes.

[0010] Preferably, the front of the image collector penetrates into the second relief hole and is in close contact with the back of the rear-view lens.

[0011] Preferably, a connecting bracket is provided on the back or top of the rear-view mirror housing for fixing the rear-view mirror housing in the vehicle compartment.

[0012] Preferably, an electrochromic coating is provided in the rear-view lens, and a first photosensitive element and a second photosensitive element are further installed in the rear-view mirror housing, as well as a control circuit board for controlling the electrochromic coating to change color according to the first photosensitive element and the second photosensitive element. The first photosensitive element faces the rear-view lens, the second photosensitive element faces the back of the rear-view mirror housing, and a third relief hole is provided at a position of the back of the rear-view mirror housing opposite to the second photosensitive element.

[0013] Preferably, a beam splitter is provided between the back of the rear-view lens and the first photosensitive element, and the beam splitter is in close contact with the rear-view lens.

[0014] Preferably, the visible light transmittance is greater than 5% and less than or equal to 30% after the beam splitter is superimposed on the rear-view lens.

[0015] The beneficial effects of the present utility model are as follows: The present utility model provides an in-vehicle rearview mirror with an image acquisition function. Compared with the prior art, the present utility model has at least the following technical effects: 1. The image acquisition device is integrated in the housing of the rearview mirror. The image acquisition device can collect images inside the vehicle compartment through the rearview mirror lens (it can monitor the driver and also collect images of other positions inside the vehicle compartment). An infrared light source is installed in the rearview mirror housing. The infrared light source irradiates inside the vehicle compartment through the light filtering part and the rearview mirror lens, playing a good light supplementing role. In this way, even in the dark, the image acquisition device can ensure clear images of the vehicle compartment are collected. Moreover, since the image acquisition device is installed in the housing of the in-vehicle rearview mirror, there is no need to separately set an installation cavity in the A-pillar. The installation method of the in-vehicle rearview mirror is simple and can be pasted or sucked at the front windshield or the body symmetry line on the roof (there is no need to match the arc of the A-pillar and separately open different A-pillar decorative covers for different models and left / right steering vehicles, etc.). Therefore, there is no need to separately design for each vehicle model and left / right steering vehicle, and there is no need to repeatedly mold, significantly reducing production costs. In addition, this in-vehicle rearview mirror uses one camera to detect the vehicle occupants and the driver, without the need for a traditional setup where one camera monitors the driver and another camera monitors the co-pilot and rear passengers, saving one camera; the setting of the light filtering part can effectively prevent the infrared light source and surrounding components from being observed by the human eye, ensuring aesthetics while meeting the requirement of the infrared light source for light supplementing the image acquisition device. 2. A transition plate is provided. The transition plate facilitates the installation and fixation of the image acquisition device, infrared light source, photosensitive element, control circuit board, etc., and can better fix the rearview mirror lens; the first and second relief holes are opened to facilitate the emission of light from the light source and the image acquisition device to collect visible light and infrared light passing through the lens. 3. An electrochromic coating is provided in the rearview mirror lens. The first photosensitive element is used to detect the light irradiating from behind the vehicle, and the second photosensitive element is used to detect the light in front of the vehicle. When the difference in the sensitivity values of the two exceeds a certain threshold, the control circuit board can energize the electrochromic coating to change its color to reduce the reflected light reflected onto the driver's face, thereby reducing glare and ensuring driving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a separate schematic diagram of an in-vehicle rearview mirror assembly with an image acquisition function according to Embodiment 1 of the present utility model.

[0017] Figure 2 is an external structure schematic diagram of an in-vehicle rearview mirror with an image acquisition function according to Embodiment 1 of the present utility model.

[0018] Figure 3 is a separate schematic diagram of an in-vehicle rearview mirror assembly with an image acquisition function according to Embodiment 2 of the present utility model.

[0019] Figure 4 is a cross-sectional schematic diagram of the control circuit board part according to Embodiment 2 of the present utility model.

[0020] Figure 5 It is a schematic cross-sectional view at the image collector of the first or second embodiment of the present utility model

[0021] Explanation of the reference numerals in the drawings: 1, rearview mirror housing; 2, image collector; 3, rearview lens; 4, transition plate; 41, first relief hole; 42, second relief hole; 43, fourth relief hole; 5, infrared light source; 6, light filtering part; 7, connecting bracket; 8, control circuit board; 81, first photosensitive element; 82, second photosensitive element; 9, beam splitter plate Specific embodiments

[0022] The present utility model will be further described below in conjunction with the accompanying drawings and specific embodiments

[0023] First embodiment

[0024] Please refer to Figures 1 to 2 , Figure 5, An in-vehicle rearview mirror with an image acquisition function, comprising a rearview mirror housing 1 and an image acquirer 2. A rearview mirror lens 3 is mounted on the front of the rearview mirror housing 1, and a transition plate 4 is mounted on the front of the rearview mirror housing 1. The rearview mirror lens 3 is fixed to the front of the transition plate 4. The image acquirer 2 is arranged inside the rearview mirror housing 1. An infrared light source is also mounted inside the rearview mirror housing 1. A light filtering part 6 is provided between the infrared light source and the back of the rearview mirror lens 3. A first relief hole 41 is provided between the transition plate 4 and the infrared light source, and a second relief hole 42 is provided at the position of the transition plate 4 opposite to the image acquirer 2. The image acquirer 2 is integrated inside the rearview mirror housing. The image acquirer 2 can acquire images inside the vehicle compartment through the rearview mirror lens 3 (it can monitor the driver and also collect images of other positions inside the vehicle compartment). An infrared light source is mounted inside the rearview mirror housing 1, and the infrared light source irradiates inside the vehicle compartment through the light filtering part 6 and the rearview mirror lens 3 to play a good light supplementing role. In this way, even in the dark, it can ensure that the image acquirer 2 acquires clear images inside the vehicle compartment. Moreover, since the image acquirer 2 is installed in the housing of the in-vehicle rearview mirror, there is no need to separately set an installation cavity on the A-pillar, etc. The installation method of the in-vehicle rearview mirror is simple and can be pasted or sucked on the front windshield or at the center line of the vehicle body on the roof (there is no need to match the curvature of the A-pillar and separately open different A-pillar decorative covers for different models and left / right-hand drive vehicles, etc.). Therefore, there is no need to separately design for each vehicle model and left / right-hand drive vehicle, and there is no need to repeatedly mold, etc., which significantly reduces the production cost. In addition, this in-vehicle rearview mirror uses one camera to detect the vehicle occupants and the driver, without the need for a traditional setup where one camera monitors the driver and another camera monitors the co-pilot and rear passengers, saving one camera. The setting of the light filtering part 6 can effectively prevent the infrared light source and surrounding components from being observed by human eyes, ensuring aesthetics while meeting the requirement of the infrared light source to supplement light for the image acquirer 2. The transition plate 4 is provided, which facilitates the installation and fixation of the image acquirer 2, the infrared light source, the photosensitive element, the control circuit board 8, etc., and can better fix the rearview mirror lens 3. The first relief hole 41 and the second relief hole 42 are opened to facilitate the emission of the light source and the image acquirer 2 to acquire visible light and infrared light passing through the lens. The image acquirer 2 is communicatively connected to the driver monitoring system inside the vehicle, and transmits the acquired image data to the driver monitoring system to judge the driver. The rearview mirror lens 3 and the transition plate 4 can be bonded together with glue or double-sided tape. Preferably, the image acquirer can be a camera, etc., but is not limited thereto.

[0025] Please refer to Figures 1 to 2 , Figure 5, preferably, the light filtering part 6 is a light filtering coating, and the light filtering coating is coated on the mirror surface of the rear-view lens 3 opposite to the first relief hole 41; alternatively, the light filtering part 6 is a light filtering sheet, and the light filtering sheet is clamped between the transition plate 4 and the rear-view lens 3, and the light filtering sheet covers the first relief hole 41 opposite to the infrared light source. If the light filtering part 6 is a coating, there is no need to consider the installation position of the light filtering sheet, but the lens needs to be processed to increase the process; while if a light filtering sheet is used, it can be directly purchased externally, and the lens does not need to be additionally coated. Select according to actual needs, and one or more light filtering sheets can be provided.

[0026] Please refer to Figures 1 to 2 , Figure 5 , preferably, the visible light transmittance of the rear-view lens 3 is not less than 30%, preferably it can be 34%, 37%, 42%, 49%, 60%, etc., and is not limited thereto; the infrared light transmittance of the rear-view lens 3 is not less than 50%, preferably it can be 51%, 58%, 62%, etc., and is not limited thereto. The image collector 2 can be arranged behind the lens, and the image quality collected by it can meet the requirements of the driver monitoring system and the in-cabin detection system, and the image collector 2 can collect images in both visible light and infrared light channels.

[0027] Please refer to Figures 1 to 2 , Figure 5 , preferably, the visible light transmittance after the light filtering sheet or the light filtering coating is superimposed on the rear-view lens 3 is greater than 0% and less than or equal to 30%, preferably it can be 9%, 14%, 17%, 25%, etc., and is not limited thereto; the infrared light transmittance after the light filtering sheet or the light filtering coating is superimposed on the rear-view lens 3 is greater than or equal to 50%, preferably it can be 51%, 56%, 63%, 70%, etc., and is not limited thereto. To achieve the shielding effect of the infrared light source, ensure the aesthetics of the rear-view mirror, and ensure the supplementary light effect of the infrared light source.

[0028] Please refer to Figures 1 to 2 , Figure 5 , preferably, there are multiple infrared light sources, and correspondingly there are multiple first relief holes 41. Ensure the supplementary light effect of the infrared light source to ensure the imaging quality of the image collector 2.

[0029] Please refer to Figures 1 to 2 , Figure 5 , preferably, the front of the image collector 2 penetrates through the second relief hole 42 and is as close as possible to the back of the rear-view lens 3. Reduce refraction, etc. to ensure the clear image collected by it.

[0030] Please refer to Figures 1 to 2 , Figure 5, Preferably, a connecting bracket 7 is provided on the back or top of the rearview mirror housing 1 for fixing the rearview mirror housing 1 inside the vehicle compartment, such as on the front windshield or the roof panel of the vehicle compartment. In addition, the connecting bracket is connected to the transition plate.

[0031] Embodiment 2

[0032] Please refer to Figures 1 to 5 , The difference between this embodiment and Embodiment 1 is that: an electrochromic coating (not shown) is provided in the rearview lens 3, and a first photosensitive element 81, a second photosensitive element 82, and a control circuit board 8 for controlling the electrochromic coating to change color according to the first photosensitive element 81 and the second photosensitive element 82 are also installed in the rearview mirror housing 1. The first photosensitive element 81 faces the rearview lens 3, the second photosensitive element 82 faces the back of the rearview mirror housing 1, and a third relief hole is provided at a position on the back of the rearview mirror housing 1 opposite to the second photosensitive element 82. An electrochromic coating is provided in the rearview lens 3. The first photosensitive element 81 is used to detect the light irradiated from behind the vehicle, and the second photosensitive element 82 is used to detect the light in front of the vehicle. When the difference in the sensitivity values of the two exceeds a certain threshold, the control circuit board 8 can energize the electrochromic coating to change the color to reduce the reflected light reflected onto the driver's face, so as to reduce glare and ensure driving safety (for specific anti-glare methods, please refer to the content of CN212890112U - an interior rearview mirror and an exterior rearview mirror linkage control system and an automobile). The infrared light source, the control circuit board 8, the first photosensitive element 81, and the second photosensitive element 82 are powered, and the rearview lens 3 has two upper and lower substrates and an electrochromic coating sandwiched in the middle, and can present different light transmittance according to different voltages input by two electrodes. The infrared light source, the control circuit board 8, the first photosensitive element 81, and the second photosensitive element 82 are communicatively connected. The infrared light source, the control circuit board 8, the first photosensitive element 81, the second photosensitive element 82, the electrochromic coating control, and related coatings, etc. are all prior arts and no specific protection requirements are made.

[0033] Please refer to Figures 2 to 5 , Preferably, a beam splitter 9 is provided between the back of the rearview lens 3 and the first photosensitive element 81, and the beam splitter 9 is closely attached to the rearview lens 3. It has a low visible light transmittance and is arranged between the first photosensitive element 81 and the lens, effectively preventing the first photosensitive element 81 and the control circuit board 8 from being directly observed by human eyes, and meeting the visible light transmittance requirements for the photosensitive element to collect light intensity while ensuring aesthetics. Of course, the beam splitter 9 can also be replaced by a beam splitting coating applied on the back of the lens. A fourth relief hole is provided at a position opposite to the first photosensitive element 81.

[0034] Please refer to Figures 2 to 5, Preferably, the visible light transmittance after the beam splitter 9 and the rearview lens 3 are stacked is greater than 5% and less than or equal to 30%, so as to ensure the shielding effect on the first photosensitive element 81 and surrounding devices.

[0035] The working principle of the present utility model is as follows:

[0036] The entire interior rearview mirror is fixed to the front windshield or the roof of the vehicle compartment through the connecting bracket 7, and the angle of the interior rearview mirror is adjusted to a suitable position; in this case, the image collector 2 is integrated in the housing of the rearview mirror. The image collector 2 can collect the images inside the vehicle compartment through the rearview lens 3 (it can monitor the driver and also collect images of other positions inside the vehicle compartment). An infrared light source is installed inside the rearview mirror housing 1, and the infrared light source irradiates inside the vehicle compartment through the light filtering part 6 and the rearview lens 3 to play a good light supplementing role. In this way, even in the dark, the image collector 2 can ensure clear images of the interior of the vehicle compartment are collected. The setting of the light filtering part 6 can effectively block the infrared light source from being observed by the human eye, meeting the requirement of the infrared light source to supplement light for the image collector 2 while ensuring aesthetics. The image collector 2 is communicatively connected to the driver monitoring system inside the vehicle, and transmits the collected image data to the driver monitoring system to judge the physical condition of the driver. The light irradiated from the rear of the vehicle is detected by the first photosensitive element 81, and the second photosensitive element 82 is used to detect the light in front of the vehicle. The first photosensitive element 81 and the second photosensitive element 82 are communicatively connected to the control circuit board 8. When the difference between the sensitivity values collected by the two exceeds a certain threshold, the control circuit board 8 can energize the electrochromic coating to change the color to reduce the reflected light reflected onto the driver's face, so as to reduce glare and ensure driving safety.

[0037] The following points should be noted: First, in the description of this application, it should be noted that unless otherwise specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. It can be a mechanical connection or an electrical connection, or it can be the communication inside two components. It can be directly connected. "Up", "down", "left", "right", etc. are only used to represent the relative position relationship. When the absolute position of the object being described changes, the relative position relationship may change.

[0038] Second: In the attached drawings of the disclosed embodiments of the present utility model, only the structures related to the disclosed embodiments are involved. For other structures, reference can be made to the general design. Without conflict, the same embodiment and different embodiments of the present utility model can be combined with each other.

[0039] Finally, the above description is only the preferred embodiment of the present utility model. The protection scope of the present utility model is not limited to the above embodiments. All technical solutions within the idea of the present utility model belong to the protection scope of the present utility model.

[0040] It should be noted that for those of ordinary skill in the art, several improvements and refinements made without departing from the principles of the present utility model should also be regarded as within the scope of protection of the present utility model.

Claims

1. An in-vehicle rearview mirror with an image acquisition function, comprising a rearview mirror housing and an image acquirer, wherein a rearview lens is mounted on the front surface of the rearview mirror housing, and it is characterized in that: A transition plate is mounted on the front surface of the rearview mirror housing. The rearview mirror lens is fixed to the front surface of the transition plate. The image collector is disposed within the rearview mirror housing. An infrared light source is also mounted within the rearview mirror housing. A light filtering portion is provided between the infrared light source and the back surface of the rearview mirror lens. A first relief hole is provided between the transition plate and the infrared light source. A second relief hole is provided at a position of the transition plate opposite to the image collector.

2. The interior rearview mirror of a vehicle with an image acquisition function according to claim 1, wherein: The light filtering portion is a light filtering coating, and the light filtering coating is applied to the mirror surface of the rearview mirror lens opposite to the first relief hole. Alternatively, the light filtering portion is a light filtering sheet, and the light filtering sheet is clamped between the transition plate and the rearview mirror lens, and the light filtering sheet covers the first relief hole opposite to the infrared light source.

3. The interior rearview mirror of an automobile with an image acquisition function according to claim 2, characterized in that: The visible light transmittance of the rearview mirror lens is not less than 30%, and the infrared light transmittance of the rearview mirror lens is not less than 50%.

4. The interior rearview mirror of a vehicle with an image acquisition function according to claim 3, characterized in that: The visible light transmittance of the superposition of the light filtering sheet or the light filtering coating and the rearview mirror lens is greater than 0% and less than or equal to 30%. The infrared light transmittance of the superposition of the light filtering sheet or the light filtering coating and the rearview mirror lens is greater than or equal to 50%.

5. The interior rearview mirror of an automobile with an image acquisition function according to claim 1, characterized in that: A plurality of infrared light sources are provided, and correspondingly a plurality of first relief holes are provided.

6. The interior rearview mirror of an automobile with an image acquisition function according to claim 1, characterized in that: The front surface of the image collector penetrates through the second relief hole.

7. The interior rearview mirror of an automobile with an image acquisition function according to claim 1, characterized in that: A connection bracket is provided on the back surface or the top of the rearview mirror housing for fixing the rearview mirror housing within the carriage. Alternatively, the connection bracket is connected to the transition plate.

8. A rearview mirror for a vehicle with an image acquisition function according to any one of claims 1 to 7, characterized in that: An electrochromic coating is provided in the rearview mirror lens. A first photosensitive element and a second photosensitive element are also mounted within the rearview mirror housing, as well as a control circuit board for controlling the electrochromic coating to change color according to the first photosensitive element and the second photosensitive element. The first photosensitive element faces the rearview mirror lens, the second photosensitive element faces the back surface of the rearview mirror housing, and a third relief hole is provided at a position of the back surface of the rearview mirror housing opposite to the second photosensitive element.

9. The automotive interior rearview mirror with an image acquisition function according to claim 8, characterized in that: A beam splitter is provided between the back surface of the rearview mirror lens and the first photosensitive element, and the beam splitter is in close contact with the rearview mirror lens.

10. The interior rearview mirror of an automobile with an image acquisition function according to claim 9, characterized in that: The visible light transmittance of the superposition of the beam splitter and the rearview mirror lens is greater than 5% and less than or equal to 30%.

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