Colorful black-and-white double-camera module
The dual-camera module with near-infrared lighting and image fusion enhances low-light and adverse weather imaging by balancing noise, brightness, and color, suitable for facial recognition and covert operation.
Patent Information
- Application Number
- CN202422316493.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-23
- Publication Date
- 2025-07-15
- Estimated Expiration
- 2034-09-23
AI Technical Summary
In dark light environments or extreme weather conditions, existing camera modules find it difficult to obtain clear and high-quality images, especially in night environments and extreme weather, where the image noise is high and the imaging effect is poor.
It adopts a color black and white dual camera module, including visible light lenses and near-infrared lenses, combined with near-infrared fill light technology, provides color information through visible light lenses with the same focal length, near-infrared lenses provide brightness and detail information, and provides infrared light fill light of specific wavelengths on the outside of the lens through near-infrared fill light, combining heat dissipation design and dust-proof foam to improve imaging quality.
Obtain clear and high-quality images in dark light environments and extreme weather. It is suitable for face recognition, with good concealment and miniaturization, and is suitable for gate machines and building access control machines.
Smart Images
Figure CN223110092U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of cameras, and particularly relates to a color and black-and-white dual-camera module. Background Technique
[0002] In low-light environments, especially at night, there will be a lot of noise in the captured images of the module, reducing the image clarity. Generally, the improvement methods are to extend the exposure time, or increase the ISO sensitivity, or increase the lens aperture, or use a white light fill light to illuminate, so that as much light as possible is received by the photosensitive device. However, these four methods will introduce new problems. For example, extending the exposure time will make the optical jitter phenomenon obvious, increasing the ISO sensitivity will cause current crosstalk and affect the image purity, increasing the lens aperture will make the lens volume larger and the cost higher, and using a white light fill light will expose the position of the camera. Moreover, in low visibility situations such as foggy weather or dusty weather, the white light has very weak penetration and cannot achieve the ideal fill light effect.
[0003] Nowadays, with the increasingly widespread application of multi-camera (such as dual-camera, etc.) modules, it provides more diverse and clear image records for human work or life. For example, a color and black-and-white dual-camera module can further improve the image clarity in low-light or night scenes. However, since the image capture quality of the camera module is closely related to the ambient light conditions, when the light is insufficient, especially at night when the brightness is insufficient, there will still be a lot of noise in the image and clear imaging cannot be achieved. In addition, extreme weather also seriously affects the imaging effect of the camera. Therefore, a dual-camera module with miniaturization, good concealment and capable of obtaining clear images under extremely low illuminance at night and extreme weather conditions is proposed. Summary of the Utility Model
[0004] The purpose of the utility model is to propose a color and black-and-white dual-camera module aiming at the above problems, which helps to improve the image capture quality and concealment in low-light environments and realizes miniaturization.
[0005] To achieve the above purpose, the technical solution adopted by the utility model is as follows:
[0006] A color and black-and-white dual-camera module proposed by the utility model includes a housing, a fill light component, a first FPC flexible board, a camera component and a second FPC flexible board, wherein:
[0007] The camera component includes a visible light lens and a near-infrared lens arranged side by side on the housing, and the visible light lens and the near-infrared lens have the same focal length;
[0008] The fill light component is connected to the housing and is arranged close to the object side of the visible light lens and the near-infrared lens, and includes a plurality of fill light lamps for providing near-infrared light, and the fill light lamps are located on the side of the visible light lens or the near-infrared lens away from the adjacent lens;
[0009] The supplementary light component is connected to the terminal device through the first FPC flexible board, and the camera component is connected to the terminal device through the second FPC flexible board.
[0010] Preferably, the focal lengths of the visible light lens and the near-infrared lens are both 2.7 mm to 3.0 mm, and the apertures are both 1.8 to 2.2.
[0011] Preferably, there are four supplementary light lamps which are symmetrically distributed. The power of the supplementary light lamp is less than or equal to 3.6 W, the voltage is less than or equal to 3.7 V, and the working wavelength band is 850 nm ± 20 nm.
[0012] Preferably, the optical axis distance between the visible light lens and the near-infrared lens is 12.3 mm to 12.5 mm. The optical axis distance from the supplementary light lamp to the nearest lens is 12 mm to 14 mm, and the distance between two supplementary light lamps close to the same lens is 9 mm to 11 mm.
[0013] Preferably, the horizontal field of view angle of the visible light lens and the near-infrared lens is greater than or equal to 87°, and the vertical field of view angle is greater than or equal to 57°.
[0014] Preferably, the color and black-and-white dual camera module further includes a black dust-proof foam. The black dust-proof foam is connected to the housing and protrudes from the object-side end faces of the visible light lens and the near-infrared lens. Through holes for avoiding the supplementary light lamp, the visible light lens, and the near-infrared lens are provided on the black dust-proof foam.
[0015] Preferably, the color and black-and-white dual camera module further includes a first heat sink for dissipating heat of the supplementary light component and a second heat sink for dissipating heat of the camera component. The first heat sink is located between the supplementary light component and the housing, and the second heat sink is located between the camera component and the housing.
[0016] Preferably, the color and black-and-white dual camera module further includes a connection base. The connection base is connected to the camera component through a plurality of second locking screws to clamp the second FPC flexible board. The second FPC flexible board is used to output dual-channel MIPI signals, and the image frame rate of the color and black-and-white dual camera module is greater than or equal to 30 fps.
[0017] Preferably, the external dimensions of the color and black-and-white dual camera module satisfy: L * W * H ≤ 100 mm * 26 mm * 22 mm, where L represents the direction of the center connection line of the visible light lens and the near-infrared lens, H represents the optical axis direction of the visible light lens or the near-infrared lens, and W represents the direction perpendicular to L and H.
[0018] Preferably, a plurality of rubber rings are further provided on the housing, and the color and black-and-white dual camera module is connected to the terminal device through screws passing through the rubber rings.
[0019] Compared with the prior art, the beneficial effects of the present utility model are:
[0020] The color and black-and-white dual camera module can obtain clear and high-quality images in low-light environments by combining near-infrared supplementary lighting with a near-infrared lens and a visible light lens. That is, color information is provided by the visible light lens (color lens), and brightness and detail information are provided by the near-infrared lens (black-and-white lens). The obtained images are more conducive to using image fusion algorithms in the prior art, enabling the final images to achieve a better balance in terms of noise, brightness, color, details, etc., and are particularly suitable for face recognition. Specifically, by using visible light lenses and near-infrared lenses with the same focal length, the function of the human eye can be simulated to form a perspective difference, giving the image depth information, so as to further process the image through algorithms, such as completing the function of face recognition, etc.; and by using near-infrared supplementary lighting technology to emit infrared light of a specific wavelength, a better supplementary lighting effect can be achieved, which can improve the visibility, clarity, and concealment of objects; the supplementary light lamps are arranged on the outer sides of the two lenses, and the heat dissipation of the supplementary light lamps and the lenses themselves is reduced through the first heat sink and the second heat sink, which is beneficial to avoiding the problem of the lens temperature rising and affecting the imaging quality; and using black dust-proof foam can not only prevent dust but also block stray light, while playing a role in buffering and protecting the lens; the external dimensions of the module are controlled within 100mm * 26mm * 22mm, and the small size can meet the usage requirements of turnstiles or building access control devices. Description of the Drawings
[0021] Figure 1 It is a schematic structural diagram of the color and black-and-white dual camera module of the present utility model;
[0022] Figure 2 It is an exploded view of the color and black-and-white dual camera module of the present utility model;
[0023] Figure 3 It is a top view of the color and black-and-white dual camera module of the present utility model.
[0024] Description of the reference numerals: 1, black dust-proof foam; 2, first locking screw; 3, supplementary lighting component; 4, first heat sink; 5, rubber ring; 6, first FPC flexible board; 7, housing; 8, second heat sink; 9, camera component; 10, second FPC flexible board; 11, connecting seat; 12, second locking screw; 31, supplementary light lamp; 91, visible light lens; 92, near-infrared lens. Detailed Embodiments
[0025] Next, the technical solutions in the embodiments of the present application will be clearly and completely described 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. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.
[0026] It should be noted that when a component is referred to as being "connected" to another component, it can be directly connected to the other component or there can also be an intermediate component. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field of this application. The terms used in the specification of this application herein are only for the purpose of describing specific embodiments and are not intended to limit this application.
[0027] As Figures 1 - 3 shown, a color and black-and-white dual camera module includes a housing 7, a supplementary lighting component 3, a first FPC flexible board 6, a camera component 9, and a second FPC flexible board 10, wherein:
[0028] The camera component 9 includes a visible light lens 91 and a near-infrared lens 92 arranged side by side on the housing 7, and the visible light lens 91 and the near-infrared lens 92 have the same focal length;
[0029] The supplementary lighting component 3 is connected to the housing 7 and is arranged close to the object side of the visible light lens 91 and the near-infrared lens 92. It includes a plurality of supplementary light lamps 31 for providing near-infrared light, and the supplementary light lamps 31 are located on the side of the visible light lens 91 or the near-infrared lens 92 away from the adjacent lens;
[0030] The supplementary lighting component 3 is connected to the terminal device through the first FPC flexible board 6, and the camera component 9 is connected to the terminal device through the second FPC flexible board 10.
[0031] Among them, the housing 7 can be of any shape structure. The camera component 9 includes a visible light lens 91 and a near-infrared lens 92 arranged side by side and having the same focal length. The visible light lens 91 and the near-infrared lens 92 can also be arranged on the corresponding PCB board according to requirements to jointly form the camera component 9. The visible light lens 91 is equipped with a filter that blocks visible light in the near-infrared band and allows visible light to pass through, and the near-infrared lens 92 is equipped with a filter that blocks visible light and allows the near-infrared band to pass through. Both lenses are equipped with high-sensitivity sensors (sensors). The two sensors of the color and black-and-white dual camera module in this embodiment are 1 / 2.7" two million pixels. The supplementary lighting component 3 includes a plurality of supplementary light lamps 31 for providing near-infrared light. The supplementary light lamps 31 can also be arranged on the corresponding PCB board according to requirements to jointly form the supplementary lighting component 3. The supplementary light lamps 31 can be replaced by LED lamps or other types of lamps well-known to those skilled in the art. Further, the LED lamps can be fixed to the corresponding PCB board by soldering. The PCB board of the LED lamps is connected to the terminal device through the FPC flexible board, and the input signal through the terminal device is used to control the on and off of the LED lamps. The PCB board of the LED lamps is attached to the housing 7 by a plurality of first locking screws 2, and the PCB board of the lens can also be fixed to the housing 7 by several screws. The number of each screw can be adjusted according to actual requirements. The terminal device can be a computer, a server, etc.
[0032] The color and black-and-white dual camera module can obtain clear and high-quality images in low-light environments by combining near-infrared supplementary lighting with a near-infrared lens 92 and a visible-light lens 91. That is, color information is provided by the visible-light lens 91 (color lens), and brightness and detail information are provided by the near-infrared lens 92 (black-and-white lens). The obtained images are more conducive to using image fusion algorithms in the prior art, so that the final image noise, brightness, color, details, etc. reach a better balance point, especially suitable for face recognition. Specifically, using visible-light lens 91 and near-infrared lens 92 with the same focal length can mimic the function of the human eye to form a viewing angle difference, giving the image depth information, so as to further process the image through algorithms, such as completing the function of face recognition, etc.; and because in nighttime or low-light environments, traditional white-light supplementary lighting technology often cannot meet the monitoring requirements. The supplementary lighting component 3 can improve the visibility and clarity of objects by using near-infrared supplementary lighting technology to emit infrared light of a specific wavelength. The near-infrared light has a longer wavelength and is not easily detected or perceived. Therefore, the near-infrared supplementary lighting technology has good concealment, and the near-infrared light has strong penetrability in the air, and can achieve a good supplementary lighting effect in bad weather such as haze and sandstorms; the supplementary lighting lamps 31 are arranged outside the two lenses, which can reduce the problem of the heat generated by the supplementary lighting lamps 31 being transmitted to the lenses, causing the lenses to heat up and affecting the imaging quality.
[0033] In one embodiment, the focal lengths of the visible-light lens 91 and the near-infrared lens 92 are both 2.7 mm to 3.0 mm, and the apertures are both 1.8 to 2.2. For example, preferably, the penetration wavelength of the near-infrared light lens is 850 nm, the focal lengths of the two lenses are the same at 2.8 mm, and the apertures are both 2.0, which can ensure that sufficient light enters the sensors of the visible-light lens 91 and the near-infrared lens 92 for each camera. The visible-light lens 91 and the near-infrared lens 92 can be lenses that meet the conditions in the prior art.
[0034] In one embodiment, there are four supplementary lighting lamps 31 and they are symmetrically distributed. The power of the supplementary lighting lamps 31 is less than or equal to 3.6 W, the voltage is less than or equal to 3.7 V, and the working band is 850 nm ± 20 nm. In this embodiment, the supplementary lighting lamps 31 are LED lamps and the number is four. They are symmetrically arranged on the PCB board to form the supplementary lighting component 3, distributed at the four corners of the PCB board, with a light-emitting band of 850 nm. The power of each LED lamp is 3.5 W, and the supply voltage is 3.6 V. On the premise of ensuring sufficient illumination, the heat generated by the LEDs can be minimized.
[0035] In one embodiment, the optical axis distance between the visible-light lens 91 and the near-infrared lens 92 is 12.3 mm to 12.5 mm, the optical axis distance between the supplementary lighting lamps 31 and the nearest lens is 12 mm to 14 mm, and the distance between two supplementary lighting lamps 31 close to the same lens is 9 mm to 11 mm. It can improve the visibility and clarity of objects, achieve a good supplementary lighting effect, and is conducive to miniaturization.
[0036] In one embodiment, the horizontal field of view angle of the visible light lens 91 and the near-infrared lens 92 is greater than or equal to 87°, and the vertical field of view angle is greater than or equal to 57°. Preferably, the horizontal field of view angle of each lens is 87.8°, and the vertical field of view angle is 57.5°, which can ensure that the captured image has sufficient field width and the TV distortion is less than 0.2%, such as 0.1%, which can ensure that the images captured by the two lenses are not distorted, facilitating the reduction of the algorithm difficulty for face recognition.
[0037] In one embodiment, the color and black-and-white dual camera module further includes a black dust-proof foam 1, which is connected to the housing 7 and protrudes from the object-side end faces of the visible light lens 91 and the near-infrared lens 92. Through holes for avoiding the fill light 31, the visible light lens 91 and the near-infrared lens 92 are provided on the black dust-proof foam 1. The black dust-proof foam is preferably black, which can not only prevent dust but also block stray light, and at the same time play a role in buffering and protecting the lens. If it is replaced with white, it will increase the light reflection in the front and cause image stray light.
[0038] In one embodiment, the color and black-and-white dual camera module further includes a first heat sink 4 for dissipating heat from the fill light component 3 and a second heat sink 8 for dissipating heat from the camera component 9. The first heat sink 4 is located between the fill light component 3 and the housing 7, and the second heat sink 8 is located between the camera component 9 and the housing 7. Among them, the fill light component 3 is provided with a corresponding first heat sink 4 for conducting the heat generated when the LED lamp works to reduce the temperature. The second heat sink 8 is attached around the sensor of the camera component 9 for conducting heat and reducing the temperature increased due to the heat generated by the electrical components during operation.
[0039] In one embodiment, the color and black-and-white dual camera module further includes a connection base 11, and the connection base 11 is connected to the camera component 9 through a plurality of second locking screws 12 to clamp the second FPC flexible board 10. The second FPC flexible board 10 is used to output dual-channel MIPI signals, and the image frame rate of the color and black-and-white dual camera module is greater than or equal to 30fps. In this embodiment, the maximum image transmission rate of the color and black-and-white dual camera module can reach 60fps, and it is 30fps during low-speed transmission. The output interface is in the form of 12-bit dual-channel MIPI. One end of the interface is on the PCB board of the camera component 9, and the other end is on the second FPC flexible board 10. After the interface on the second FPC flexible board 10 is connected to the interface on the PCB board of the camera component 9, the connection base 11 is used to press the interface part, and a plurality of second locking screws 12 are used to lock the connection base 11 to the PCB board of the camera component 9, so that the second FPC flexible board 10 is firmly pressed on the PCB board of the camera component 9 and is not easily disconnected due to dragging.
[0040] In one embodiment, the external dimensions of the color and monochrome dual camera module satisfy: L*W*H ≤ 100mm*26mm*22mm, where L represents the direction of the center line connecting the visible light lens 91 and the near-infrared lens 92, H represents the optical axis direction of the visible light lens 91 or the near-infrared lens 92, and W represents the direction perpendicular to L and H. Such external dimensions meet the usage requirements of turnstiles or building access control devices and can be used to perform the function of face recognition.
[0041] In one embodiment, a number of rubber rings 5 are also provided on the housing 7, and the connection between the color and monochrome dual camera module and the terminal device is achieved through screws passing through the rubber rings 5. A number of notches are provided at the edge of the housing 7, and the rubber rings 5 are installed at the notches. When the entire module is assembled with the terminal device, the rubber rings 5 can buffer the screw locking force at the notches, making it difficult for the housing 7 to crack due to excessive locking force. The number of rubber rings 5 can be adjusted according to actual needs, such as four.
[0042] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered to be within the scope described in this specification.
[0043] The above-described embodiments only represent relatively specific and detailed embodiments of the present application, but should not be construed as limiting the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.
Claims
1. A color and black-and-white dual camera module, characterized in that: The color and black-and-white dual camera module includes a housing (7), a supplementary light component (3), a first FPC flexible board (6), a camera component (9), and a second FPC flexible board (10), where: The camera component (9) includes a visible light lens (91) and a near-infrared lens (92) arranged side by side on the housing (7), and the visible light lens (91) and the near-infrared lens (92) have the same focal length; The supplementary light component (3) is connected to the housing (7) and is arranged close to the object side of the visible light lens (91) and the near-infrared lens (92), and includes a plurality of supplementary light lamps (31) for providing near-infrared light. The supplementary light lamps (31) are located on the side of the visible light lens (91) or the near-infrared lens (92) away from the adjacent lens; The supplementary light component (3) is connected to the terminal device through the first FPC flexible board (6), and the camera component (9) is connected to the terminal device through the second FPC flexible board (10).
2. The color and black-and-white dual camera module according to claim 1, characterized in that: The focal lengths of the visible light lens (91) and the near-infrared lens (92) are both 2.7 mm to 3.0 mm, and the apertures are both 1.8 to 2.
2.
3. The color and black-and-white dual camera module according to claim 1, wherein: There are four supplementary light lamps (31) and they are symmetrically distributed. The power of the supplementary light lamps (31) is less than or equal to 3.6 W, the voltage is less than or equal to 3.7 V, and the working band is 850 nm ± 20 nm.
4. The color and black-and-white dual camera module according to claim 3, wherein: The optical axis distance between the visible light lens (91) and the near-infrared lens (92) is 12.3 mm to 12.5 mm. The optical axis distance of the supplementary light lamp (31) from the nearest lens is 12 mm to 14 mm, and the distance between two adjacent supplementary light lamps (31) close to the same lens is 9 mm to 11 mm.
5. The color and black-and-white dual camera module according to claim 1, wherein: The horizontal field of view angle of the visible light lens (91) and the near-infrared lens (92) is greater than or equal to 87°, and the vertical field of view angle is greater than or equal to 57°.
6. The color and black-and-white dual camera module according to claim 1, characterized in that: The color and black-and-white dual camera module further includes a black dust-proof foam (1). The black dust-proof foam (1) is connected to the housing (7) and protrudes from the object side end faces of the visible light lens (91) and the near-infrared lens (92). Through holes for avoiding the supplementary light lamps (31), the visible light lens (91), and the near-infrared lens (92) are provided on the black dust-proof foam (1).
7. The color and black-and-white dual camera module according to claim 1, characterized in that: The color and black-and-white dual camera module further includes a first heat sink (4) for dissipating heat of the supplementary light component (3) and a second heat sink (8) for dissipating heat of the camera component (9). The first heat sink (4) is located between the supplementary light component (3) and the housing (7), and the second heat sink (8) is located between the camera component (9) and the housing (7).
8. The color and black-and-white dual camera module according to claim 1, wherein: The color and black-and-white dual camera module further includes a connection seat (11). The connection seat (11) is connected to the camera component (9) through a plurality of second locking screws (12) to clamp the second FPC flexible board (10). The second FPC flexible board (10) is used to output dual-channel MIPI signals, and the image frame rate of the color and black-and-white dual camera module is greater than or equal to 30 fps.
9. The color and black-and-white dual camera module according to claim 1, wherein: The external dimensions of the color and black-and-white dual camera module satisfy: L*W*H ≤ 100mm*26mm*22mm, where L represents the direction of the center line connection of the visible light lens (91) and the near-infrared lens (92), H represents the optical axis direction of the visible light lens (91) or the near-infrared lens (92), and W represents the direction perpendicular to L and H.
10. The color and black-and-white dual camera module according to claim 1, wherein: A plurality of rubber rings (5) are further provided on the housing (7), and the connection between the color and black-and-white dual camera module and the terminal device is realized by screws passing through the rubber rings (5).