CN210402379U - Lens assembly, imaging device and biological characteristic detection system - Google Patents

Abstract

The utility model discloses an imaging device, including the light detection layer with set up the lens subassembly on the light detection layer, the lens subassembly includes a plurality of small lenses, the light detection layer includes a plurality of pixel units, and every small lens is just to a plurality of pixel units, pixel unit sees through the small lens receives the formation of image light beam that has biological characteristic information and converts the signal of telecommunication into corresponding. The utility model also discloses a lens subassembly and biological characteristic detecting system. The utility model discloses can realize better user experience.

Description

Lens assembly, imaging device and biometric detection system

technical field

The utility model relates to the field of optoelectronic technology, in particular to a lens assembly, an imaging device and a biological feature detection system.

Background technique

With the advancement of technology and the improvement of people's living standards, users require more functions and stylish appearance for electronic products such as mobile phones, tablet computers, and cameras. At present, most electronic products, including mobile phones, collect the biometric information of external objects by means of optical imaging, and the imaging device used to collect the imaging beam with biometric information is limited by the optical imaging structure, and is often large in size. Requires a larger space.

Utility model content

In view of this, the present invention provides a lens assembly, an imaging device and a biological feature detection system for solving the problems of the prior art.

One aspect of the present invention provides an imaging device, which includes a light detection layer and a plurality of small lenses disposed on the light detection layer, the light detection layer includes a plurality of pixel units, and each small lens faces the plurality of pixel units , the pixel unit receives the imaging light beam with biometric information through the small lens and converts it into a corresponding electrical signal.

In some embodiments, the light detection layer is a light sensor, the light sensor receives the imaging light beam and is used to generate corresponding image data, and the light sensor includes an infrared light sensor.

In some embodiments, imaging beams of different directions passing through one lenslet can be received by different pixel units.

In some embodiments, the lenslets cover 100-10,000 pixel units, or the lenslets cover an array of pixel units ranging from 10*10 to 100*100.

In some embodiments, a filter layer disposed on the light detection layer is further included, and the filter layer is used for transmitting the imaging light beam and blocking light beams of other wavelengths from passing through.

In some embodiments, it further includes a first substrate disposed below the light detection layer, and a second substrate disposed above the filter layer, and the lenslets are disposed on the second substrate superior.

In some embodiments, a light-shielding layer is further provided corresponding to the small lens, and the light-shielding layer is used to block the light beam from passing through; or the light-shielding layer can transmit the imaging light beam but block other wavelength light beams.

In some embodiments, it further includes a protective layer disposed above the small lenses, the protective layer covering the small lenses and/or the light shielding layer.

In certain embodiments, the imaging beam is a detection beam reflected by an external object, the detection beam is from a light-emitting module capable of emitting a detection beam for biometric detection; or the imaging beam is an external object that will enter The detection beam generated in the interior thereof is transmitted, and the imaging beam is visible light and/or invisible light, and the invisible light includes near-infrared light.

In certain embodiments, the lenslets meet one or more of the following conditions: diameter is 50-800 microns; sag height is 0.6-100 microns; curvature radius is 30-1000 microns; focal length is 15-1000 microns microns.

One aspect of the present invention provides a lens assembly including the small lens of the above-mentioned imaging device.

One aspect of the present invention provides a biological feature detection system, including the above-mentioned lens assembly, or the above-mentioned imaging device.

The beneficial effect of the present invention is that the imaging device and the lens assembly of the present invention include a plurality of small lenses, and the small lenses focus the imaging light beam with biometric information on the pixel unit through the lens imaging principle, and the pixel unit The imaging beam is received and converted into an electrical signal. Due to the small volume and size of the small lens and its small focal length, the thickness of the imaging device can be greatly reduced. In addition, through the lens imaging method, the area of the light detection layer used for photosensitive imaging of the imaging device can be smaller than the area of the external object actually sensed, so the overall volume of the imaging device is small. Therefore, the lens assembly, the imaging device and the biometric detection system of the present invention can achieve a smaller volume, require less space, can be applied to display devices and portable devices with a high screen ratio, and have better user experience.

Description of drawings

FIG. 1 is a schematic diagram of an embodiment of an imaging device of the present invention;

Fig. 2 is a partial cross-sectional schematic view of the imaging device shown in Fig. 1;

FIG. 3 is a schematic diagram of an embodiment of the imaging device shown in FIG. 1;

FIG. 4 is a schematic diagram of one embodiment of the imaging device shown in FIG. 1;

FIG. 5 is a schematic diagram of an embodiment of the imaging device shown in FIG. 1;

6 is a schematic diagram of an embodiment of the biometric detection system of the present invention;

7 is a schematic diagram of an embodiment of the biometric detection system of the present invention;

8 is a schematic diagram of an embodiment of the biometric detection system of the present invention;

FIG. 9 is a schematic diagram of an embodiment of the biometric detection system of the present invention.

Detailed ways

In the detailed description of embodiments of the present invention, it will be understood that when a substrate, sheet, layer or pattern is referred to as being "on" or "under" another substrate, sheet, layer or pattern, It may be "directly" or "indirectly" on another substrate, another sheet, another layer or another pattern, or one or more intervening layers may also be present. The thickness and size of each layer in the drawings of the specification may be exaggerated, omitted or schematically represented for the purpose of clarity. Furthermore, the sizes of elements in the drawings do not fully reflect actual sizes.

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the implementations. example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

Please refer to FIG. 1 , which is a partial perspective view of an imaging device 10 according to an embodiment of the present invention. Please also refer to FIG. 2 , which is a partial cross-sectional schematic diagram of the side surface of the imaging device 10 .

The imaging device 10 includes a light detection layer 11 and a lens assembly (not numbered) disposed over the light detection layer 11. The lens assembly includes a plurality of small lenses (Mini-Lens) 15 .

In this embodiment, the imaging device 10 further includes a light-shielding layer 14 arranged at intervals corresponding to the small lenses 15 , the light-shielding layer is used to block the transmission of light beams; Image beam 102 but block other wavelength beams. For example, but not limited to, the light shielding layer 14 is a black matrix material.

In this embodiment, the imaging device 10 further includes a filter layer 12 disposed on the light detection layer 11 , and the filter layer 12 is used to transmit the imaging beam 102 and block beams of other wavelengths from passing through.

In this embodiment, it further includes a first substrate 16 disposed below the light detection layer, and a second substrate 13 disposed above the filter layer 12, and the small lens 15 is disposed on the second On the substrate 13 , the light shielding layer 14 covers the small lenses 15 on the second substrate 13 and is arranged on the second substrate 13 at intervals.

In this embodiment, the imaging device further includes a protective layer 17 (not shown in FIG. 1 ) disposed above the small lens 15 . The protective layer 17 can be used to protect the lenslets 15 . For example, but not limited to, the protective layer can play a role of moisture-proof, dust-proof, scratch-proof and the like. In some embodiments, the protective layer 17 covers the light shielding layer 14 and/or the lenslets 15.

It can be understood that the structure shown in FIG. 2 is only for illustration, and a protective cover plate and/or optical coating, lens, prism, optical film or other devices capable of transmitting the imaging beam 102 may be provided between the external object 1000 and the imaging device 10 optical components. The imaging beam 102 is a beam from an external object 1000 with biometric information.

In some embodiments, the imaging beam 102 is a detection beam reflected by an external object 1000, and the detection beam comes from a light-emitting module (not shown) capable of emitting a detection beam for biometric detection; or the imaging beam The light beam 102 is a light beam through which the external object 1000 transmits the detection light beam entering the interior thereof.

In some embodiments, the imaging beam 102 may be a beam emitted from the external object 1000 itself, eg, infrared light emitted by the external object 1000 through infrared radiation.

In some embodiments, the imaging beam 102 may be visible light and/or invisible light in the external environment reflected by the external object 1000 , such as, but not limited to, near infrared light. The present application does not limit the imaging beam 102, which can be received by the imaging device 10 and converted into corresponding electrical signals, and can be further used for biometric detection, and/or image generation, and/or spatial coordinate detection, and/or living body The detected light beams can be regarded as the imaging light beams 102 .

In some embodiments, the protective layer 17 is made of a transparent material, such as a transparent polymer material, and the imaging light beam 102 and other wavelength light beams can pass through the protective layer 17 .

In some embodiments, the protective layer 17 is made of a translucent or opaque material, and the imaging light beam 102 and other wavelength light beams can pass through the protective layer 17 .

In some embodiments, the protective layer 17 is made of a translucent or opaque material, and the imaging light beam 102 can pass through the protective layer 17 while other wavelength light beams cannot pass through the protective layer 17 .

In some embodiments, the imaging beam 102 includes visible light and/or invisible light. Further, in some embodiments, the invisible light includes near-infrared light. The visible light includes a light beam with a wavelength range of 400-700 nm (nanometers), and the near-infrared light includes a light beam with a wavelength range of 800-1000 nm.

In some embodiments, the light detection layer includes a light sensor for receiving the imaging light beam and converting it into a corresponding electrical signal. For example and without limitation, the light sensor includes an infrared light sensor.

In some embodiments, the protective layer 17 may be omitted.

In some embodiments, the first substrate 16 and/or the second substrate 13 may be partially or completely omitted.

The small lens 15 can be made of transparent glass, transparent resin, or other transparent materials. The lenslet 15 has a spherical or aspherical upper surface that is convex upward. The imaging beam 102 can enter the lenslet 15 through the upper surface of the lenslet 15 and pass through the lenslet 15 . The small lens 15 has a converging effect on the imaging beam 102 . The small lens 15 may be a spherical cutout structure. Visible light can also pass through the lenslets 15 , such as visible light from the external environment or visible light reflected or emitted by external objects 1000 .

In some embodiments, the lenslets 15 are made of transparent materials. Further, the small lens 15 is made of transparent glass or plastic, and visible light and/or near-infrared light can pass through the small lens 15 .

In some embodiments, the lenslets 15 are made of translucent or opaque materials. Further, visible light or near-infrared light can pass through the small lens 15 , or near-infrared light can pass through the small lens 15 but visible light cannot pass through the small lens 15 . Further, the surface of the small lens 15 can be coated with an optical coating, for example, but not limited to, the surface of the small lens 15 is coated with infrared ink, the infrared ink transmits near-infrared light but absorbs or/and reflects visible light .

In some embodiments, the plurality of lenslets 15 are arranged in an array. The arrangement of the plurality of small lenses 15 may form a regular or irregular two-dimensional pattern.

In this embodiment, the light detection layer 11 includes a plurality of pixel units 111, and the pixel units 111 can receive the imaging light beam 102 and convert it into a corresponding electrical signal. The lower surface of the small lens 15 is a circular plane, and the imaging light beam 102 can exit from the lower surface of the small lens 15 and further pass through the second substrate 13 and the filter layer 12 to reach the pixel unit 111.

In this embodiment or a modified embodiment, the imaging light beam 102 transmitted from one small lens 15 may have different exit directions, so that the imaging light beam 102 transmitted through one small lens 15 may reach different pixel units 111 . As shown in FIG. 2 , one small lens 15 faces a plurality of pixel units 111 .

For the convenience of description, a plurality of pixel units 111 capable of receiving the imaging light beam 102 transmitted by the same small lens 15 are referred to as pixel units 111 covered by the small lens 15 . For example, but not limited to, a small lens 15 can cover an array of pixel units 111 of 10*10, or an array of pixel units 111 of 100*100, or an array of pixel units 111 with a size between 10*10 and 100*100, Or 100 to 10,000 pixel units 111 .

In this embodiment or in the modified embodiment, the small lens 15 of the imaging device 10 utilizes the optical path design principle of lens imaging, so that the imaging light beam 102 from the external object 1000 is received on the pixel unit 111 and converted into corresponding electrical Signal. For example and without limitation, the imaging beam 102 is used to generate image data with biometric information of the external object 1000 . According to the relationship between the focal length of the small lens 15, the object distance outside the external object 1000 and the image distance of the pixel unit 111, the photosensitive area of the light detection layer 11 and the area ratio of the external object 1000 that can be detected by the imaging device 10 can be obtained .

In the prior art, the receiving of the imaging light beam 102 is generally a small hole imaging method in which a microlens is arranged on a pixel unit, or an imaging method in which a collimation method is used to guide the optical path. Prior art photosensitive components such as light detection arrays need to have a large area in order to receive biometric information sufficient to identify external objects. Generally, the photodetection array area of photosensitive components needs to be larger than or equal to the area of the detection area. Taking fingerprint detection as an example, the detection area is usually an area located on the upper surface of the protective cover for the user's finger to touch. A "detection area" (or "sensing area") is defined on the upper surface of the protective cover. When fingerprint detection is performed, the detection area is arranged in a position suitable for a user to place a finger on the upper surface of the protective cover. Optionally, the size of the detection area is, for example, but not limited to, 4mm*4mm to 20mm*20mm. The area of the light detection array generally needs to be larger than or equal to the size of the fingerprint area actually detected, or not smaller than the area size of the detection area.

The imaging device 10 of this embodiment and the modified embodiment uses the lens of the small lens 15 to form images, and can use a small-area light detection array to realize the detection of a larger area of an external object. The area of the imaging device 10 is smaller than the actual area. The detected external object area, or smaller than the detected area. Thus saving cost and space.

In some embodiments, the lenslets 15 may have one or more of a spherical cutout structure, a ball table structure, or a terrace structure. Of course, the small lens 15 may have other convex structures, which are not specifically limited in the present invention.

In some embodiments, the external object 1000 may receive a detection beam of near-infrared light in the wavelength range of about 800-1000 nm (nanometers), which enters the interior of the external object 1000 and is transmitted by the external object 1000 as the imaging beam 102. At this time, the wavelength range of the imaging light beam 102 is 800-1000 nm.

In the prior art, an imaging device generally includes a large lens disposed above the image sensor, and a lens barrel for fixing the large lens or a base for supporting the image sensor. In this embodiment, the imaging device 10 adopts the structure of the lens assembly of Mini-Lens. A large lens, a lens barrel, etc. can be omitted, thereby having a smaller size and volume.

In some embodiments, the small lens 15 further includes a lower surface, and the lower surface may be a circle, an ellipse, a square, a polygon, or other shapes that meet chip design requirements.

In some embodiments, the lenslets 15 further include a lower surface having a convex arc.

In some embodiments, the lenslets 15 further include a lower surface having a concave curvature.

In some embodiments, the diameter of the lenslets 15 is about 50-800 microns.

In some embodiments, the sag height of the lenslets 15 is about 0.6 microns to 100 microns.

In some embodiments, the radius of curvature of the lenslets 15 is about 30-1000 microns.

In some embodiments, the focal length of the small lens 15 is about 15 micrometers to 1000 micrometers.

The light shielding layer 14 may also be called a black matrix, which is usually made of a black light absorbing material. The light shielding layer 14 can absorb the imaging beams 102 of visible light and near-infrared light. The light shielding layer 14 covers the intervals of the plurality of small lenses 15 correspondingly, so that the imaging light beam 102 will not pass through the intervals between the small lenses 15 .

In some embodiments, the small lenses 15 may be spaced or not, or some of the small lenses 15 may be spaced and another part of the small lenses 15 may not be spaced, which is not specifically limited by the present invention.

The small lens 15 and the light shielding layer 14 are provided on the second substrate 163, and the second substrate 13 can be made of a transparent polymer material, for example, but not limited to, the second substrate 13 is PET (Polyethylene terephthalate) film. The imaging beam 102 can pass through the second substrate 13 .

The filter layer 12 includes a near-infrared filter film, and the filter layer 12 can transmit near-infrared light and absorb or reflect light beams of other wavelengths. For example, but not limited to, the filter layer 12 can transmit light beams with a wavelength of 800-1000 nm, or the filter layer 12 can transmit near-infrared light with a wavelength of 840 nm or 950 nm, and block other wavelengths of light beams from passing through.

The light detection layer 11 includes a light detection array and readout circuits and other auxiliary circuits electrically connected to the light detection array. The light detection array is a photo detector array, which includes a plurality of photo detectors distributed in an array, and the photo detectors can be used as the pixel unit 111 . In this embodiment, the light detection layer 11 includes a plurality of pixel units. The plurality of pixel units 111 are, for example, but not limited to, arranged in an array on the first substrate 166 . The pixel unit is used for receiving the imaging light beam 102 and converting it into a corresponding electrical signal. The electrical signal may be processed by the light detection layer 11 to obtain image data (eg, but not limited to, fingerprint image data) of an external object 1000 (eg, but not limited to, a finger). The first substrate 16 may be a glass substrate, a polymer film substrate, a semiconductor substrate or a substrate made of other materials. The area size of the pixel unit 111 is about 5 micrometers*5 micrometers to 10 micrometers*10 micrometers.

Taking fingerprint detection as an example, during fingerprint detection, the finger touches a detection area on the upper surface of the protective cover plate 177 . When touching the detection area, since the distance from the ridge of the finger to the protective cover 117 and the distance from the valley to the protective cover 117 are different, when the imaging beam 102 enters the imaging device 10 from the finger, The refractive index or reflectivity of the imaging beams 102 corresponding to different regions of the ridges and valleys is also different, so the different imaging beams 102 from the ridges and valleys have different light intensities when they reach the pixel unit 111 (it can be considered that the different brightness). The imaging device 10 can acquire fingerprint image data with information of the ridges and valleys of the finger by collecting the formed imaging beam 102 reflected or transmitted by the finger. Further, after verification by comparison with the pre-stored fingerprint data, the imaging device 10 can be used to realize fingerprint detection and identification.

Please refer to FIG. 3 , which is a schematic diagram of the imaging device 10 for remotely detecting the biological features of an external object 1000 . The external object 1000 is now a human face, iris or other. The imaging light beam 102 emitted or reflected by the external object 1000 is received by the pixel unit 11 through the small lens 15 and converted into a corresponding electrical signal, such as but not limited to an image signal for biometric detection. The imaging beam 102 may include visible and/or invisible light, eg, visible light and/or near infrared light. The visible light may be a light beam with a wavelength range of 400-700 nm, and the near-infrared light may be a light beam with a wavelength range of 800-1000 nm.

Alternatively, in some embodiments, the light shielding layer 14 may be provided in different locations. In the embodiment shown in FIG. 4 , the light-shielding layer 14 is provided between the filter layer 12 and the second substrate 13 , and the light-shielding layer 14 has light-transmitting holes (not numbered) corresponding to the small lenses 15 ). As shown in FIG. 5 , the light shielding layer 14 is provided between the light detection layer 11 and the filter layer 12 , and the light shielding layer 14 has light transmission holes (not numbered) corresponding to the small lenses 15 .

Compared with the prior art, the imaging device 10 uses Mini-lens instead of the existing large lens to condense the imaging beam 102. The imaging device 10 uses the principle of lens imaging to form images, so the area or size of the imaging device 10 can be Make it small or small. The above or modified embodiments of the present invention describe different situations in which the imaging device 10 adopts Mini-lens and supporting designs to achieve small size and small volume. Of course, the imaging device 10 may also have other settings. Those skilled in the art It can be understood that in order to reduce the volume or area of the imaging device 10 , the imaging device 10 and its Mini-lens can be split, combined, deformed, scaled, and tested for a limited number of times, which all belong to the protection scope of the present invention. At the same time, the structures, principles and settings of the imaging device 10 and the Mini-lens in the above-mentioned embodiments or modified embodiments and corresponding modified settings can also be applied to other embodiments disclosed in the present invention, thereby obtaining the embodiments and Its replacement, deformation, combination, disassembly, expansion, etc. all belong to the protection scope of the present invention.

In this embodiment or other embodiments, visible light refers to a light beam with a wavelength range of 400-780 nm (nanometers), and near-infrared light refers to a light beam with a wavelength range of 800-1000 nm. For example, but not limited to, the detection beam 101 and the imaging beam 102 include near-infrared light with a wavelength of 850 nm or 940 nm.

Please refer to FIG. 6 , which is a schematic diagram of an embodiment of the imaging device 10 used in the biometric detection system of the present invention. The biometric detection system includes a display device (not numbered) and an imaging device 10 . The imaging device 10 is disposed below or beside the display device.

In this embodiment, the display device includes a backlight module 21 , a display panel 22 and a protective cover 23 which are arranged in sequence from bottom to top. The imaging device 10 is disposed under the backlight module 21 , and the imaging device 10 receives the imaging beam 102 emitted or reflected by an external object 1000 through the backlight module 21 , the display panel 22 and the protective cover 23 . The display panel 22 is, for example, but not limited to, a liquid crystal display panel. The display device is, for example, but not limited to, a liquid crystal display (LCD) and the like.

Alternatively, in some embodiments, the display device may also be an OLED display, a Micro-LED display, a Mini-LED display, or the like.

Please refer to FIG. 7 , which is a schematic diagram of an embodiment of the imaging device 10 used in the biometric detection system of the present invention. The biometric detection system includes a display device (not numbered) and an imaging device 10 . The imaging device 10 is disposed below or beside the display device. The display device is used for image display, and the imaging device 10 is configured to receive the imaging beam 102 through at least a part of the display device, and the imaging beam 102 carries the biometric information of the external object 1000 .

In this embodiment, the display device includes a backlight module 21 , a display panel 22 and a protective cover 23 which are arranged in sequence from bottom to top. The imaging device 10 is disposed in the space between the bottom of the protective cover 23 and the top of the backlight module 21 , and is located on one side of the display panel 22 . The imaging device 10 receives the imaging light beam 102 formed by the reflection or transmission of the external object 1000 through the protected cover plate 23, wherein the reflection includes the external object 1000 reflecting the detection light beam emitted from a transmitting unit as the imaging light beam 102; The transmission includes that the external object 1000 transmits the detection beam entering its interior as the imaging beam 102 . The display panel 22 is, for example, but not limited to, a liquid crystal display panel, an electronic paper panel, and the like.

Please refer to FIG. 8 , which is a schematic diagram of an embodiment of the imaging device 10 used in the biometric detection system of the present invention. The biometric detection system includes a display device (not numbered) and an imaging device 10 . The imaging device 10 is disposed below or beside the display device. The display device is used for image display, and the imaging device 10 is configured to receive the imaging beam 102 through at least a part of the display device, and the imaging beam 102 carries the biometric information of the external object 1000 .

In this embodiment, the display device includes a backlight module 21 , a display panel 22 and a protective cover 23 which are arranged in sequence from bottom to top. The imaging device 10 is disposed under the protective cover 23 and on one side of the display panel 22 and the backlight module 21 . The imaging device 10 receives the imaging light beam 102 emitted or reflected by the external object 1000 through the protected cover plate 23 . The display panel 22 is, for example, but not limited to, a liquid crystal display panel, an electronic paper panel, and the like.

Please refer to FIG. 9 , which is a schematic diagram of an embodiment of the imaging device 10 used in the biometric detection system of the present invention. The biometric detection system includes a display device (not numbered) and an imaging device 10 . The imaging device 10 is disposed below or beside the display device. The display device is used for image display, and the imaging device 10 is configured to receive the imaging beam 102 through at least a part of the display device, and the imaging beam 102 carries the biometric information of the external object 1000 .

The display device includes a substrate 31 , a light-emitting layer 32 and a protective cover plate 33 arranged in sequence from bottom to top. The imaging device 10 is disposed under the protective cover plate 33 , on one side of the substrate 31 and the light-emitting layer 32 . The imaging device 10 receives the imaging light beam 102 emitted or reflected by the external object 1000 through the protected cover plate 33 . The light-emitting layer 32 includes, but is not limited to, organic light-emitting diodes (OLEDs), LEDs, Mini-LEDs, or Micro-LEDs.

In some embodiments, the above-mentioned imaging device 10 or biometric detection system may further include a processor and a memory (not shown), the processor can obtain two data of the external object 1000 according to the imaging beam 102 received by the imaging device 10 . dimensional information and/or depth information. The processor is, for example, but not limited to, an application processor (Application Processor, AP), a central processing unit (CPU), a microcontroller (MCU), and the like.

Further, the memory also pre-stores biometric information data, and the processor can compare the acquired two-dimensional information and/or depth information of the external object 1000 with the pre-stored biometric information data, thereby realizing external Two-dimensional and/or three-dimensional biometric detection and recognition of objects, such as but not limited to: two-dimensional and/or three-dimensional fingerprint detection, face detection, iris detection, subcutaneous capillary detection, etc.

In some embodiments, the biometric detection system further includes an emission unit, the emission unit is configured to emit a detection beam, and the imaging beam 102 is obtained by reflecting or transmitting the detection beam by an external object 1000 , wherein the The transmission includes that the external object 1000 transmits the detection beam entering its interior as the imaging beam 102 . The detection light beam may include one or more of flood light (Flood Light, which refers to a light beam with a wide irradiation area and a divergent irradiation angle), speckle structured light, encoded structured light, and modulated pulse signal.

The imaging device 10 receives the imaging beam 102 reflected or emitted by the external object 1000 and acquires biometric information or image information of the external object 1000 , thereby being able to detect the biometric information of the external object 1000 and/or perform image rendering on the external object 1000 , and/or detect the spatial coordinates of the external object 1000 . For example but not limited to: fingerprint detection, body temperature detection, heart rate detection, liveness detection, etc.

In the above embodiment or other embodiments, the regions/positions where the external object 1000 receives the detection beam 101 and emits the imaging beam 102 may be different or the same.

The imaging device 10 receives the imaging beam 102 and can be used for two-dimensional and/or three-dimensional biometric detection of the external object 1000, or two-dimensional and/or three-dimensional image rendering of the external object 1000, or two-dimensional and/or three-dimensional image rendering of the external object 1000. Dimensional and/or 3D spatial coordinate detection.

In the above-mentioned embodiments or modified embodiments, the external object 1000 may be a finger, and the biometric detection system 1 can perform fingerprint detection and identification. However, the present invention is not limited to the external object 1000. In other modified embodiments, the external object 1000 can also be a face, palm, iris, blood vessels, etc. The biometric detection system 1 can also be used to detect external objects 1000's of facial features, iris features, palm prints, heart rate, body temperature, etc.

By detecting and identifying the biometric features of the external object 1000, the biometric detection system 1 can be used for locking or unlocking devices, online payment service verification, identity verification in financial systems or public security systems, and access verification in access control systems, etc. products and application scenarios.

By performing two-dimensional or three-dimensional image rendering on the external object 1000, the biometric detection system 1 can also be applied to application scenarios such as photography, videography, and modeling.

By detecting the spatial coordinates of the external object 1000, the biometric detection system 1 can also be applied to application scenarios involving direction, distance, speed, and the like.

Therefore, the biometric detection system 1 can be used for two-dimensional and/or three-dimensional biometric detection and recognition of external objects, or for two-dimensional and/or three-dimensional image rendering of external objects, or for two-dimensional and/or three-dimensional external objects. / or three-dimensional spatial coordinate detection. In the embodiments and modified embodiments of the present invention, the external objects 1000 include, but are not limited to, fingers, fingerprints, eyes, irises, subcutaneous blood vessels, faces, and the like.

The biometric detection system can be a mobile phone, a tablet computer, a smart watch, an augmented reality/virtual reality device, a human motion detection device, an autonomous vehicle, a smart home device, a security device, an intelligent robot, a medical device or its components, etc.

Compared with the prior art, the imaging device 10 and the lens assembly of the present invention include a plurality of small lenses, and the small lenses focus the imaging light beam with biometric information on the pixel unit through the lens imaging principle. The volume and size of the lens are small, the focal length thereof is small, and the thickness of the imaging device can be greatly reduced. In addition, through the lens imaging method, the area of the light detection layer used for photosensitive imaging of the imaging device can be smaller than the area of the external object actually sensed, so the overall volume of the imaging device is small. Therefore, the lens assembly, the imaging device and the biometric detection system of the present invention can achieve a smaller volume, require less space, can be applied to display devices and portable devices with a high screen ratio, and have better user experience.

It should be noted that those skilled in the art can understand that without creative work, part or all of the embodiments of the present invention, as well as some or all of the modifications, replacements, changes, splits, and combinations of the embodiments , expansion, etc. should be considered to be covered by the inventive idea of the present utility model, and belong to the protection scope of the present utility model.

Any reference in this specification to "one embodiment," "an embodiment," "an example embodiment," etc. means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention . The appearances of such phrases in various places in this specification are not necessarily all referring to the same embodiment. Additionally, when a particular feature or structure is described in conjunction with any embodiment, it is claimed that it is within the skill of those skilled in the art to implement such feature or structure in conjunction with other embodiments of those embodiments.

"Length", "width", "upper", "lower", "left", "right", "front", "rear", "back", "front", "vertical" may appear in the description of the utility model The orientation or positional relationship indicated by "straight", "horizontal", "top", "bottom", "internal", "external", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the implementation of the present utility model. Examples and simplified descriptions are not intended to indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the invention. Like numerals and letters refer to like items in the figures, so once an item is defined in one figure, no further definition and explanation are required in subsequent figures. Meanwhile, in the description of the present invention, the terms "first", "second" and the like are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In the description of the present invention, "multiple" or "plurality" means at least two or two, unless otherwise expressly and specifically defined. In the description of the present utility model, it should also be noted that, unless otherwise expressly specified and limited, "setting", "installation" and "connection" should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection. Connection, or integral connection; may be mechanical connection or electrical connection; may be direct connection or indirect connection through an intermediate medium, and may be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited to this. Replacement should be covered within the protection scope of the present invention. The terms used in the claims should not be construed to limit the utility model to the specific embodiments disclosed in this specification. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims (12)

1. An imaging device, characterized in that it comprises a light detection layer and a plurality of small lenses arranged on the light detection layer, the light detection layer comprises a plurality of pixel units, and each small lens faces a plurality of pixel units, The pixel unit receives an imaging light beam with biometric information through the small lens and converts it into a corresponding electrical signal. 2 . The imaging device according to claim 1 , wherein the light detection layer is a light sensor, the light sensor receives the imaging light beam and is used to generate corresponding image data, and the light sensor comprises an infrared light sensor. 3 . . 3 . The imaging device according to claim 1 , wherein imaging light beams in different directions passing through a small lens can be received by different pixel units. 4 . 4 . The imaging device according to claim 1 , wherein the small lens covers 100-10000 pixel units, or the small lens covers a pixel unit array of 10*10 to 100*100. 5 . 5 . The imaging device according to claim 1 , further comprising a filter layer disposed on the light detection layer, the filter layer is used for transmitting the imaging light beam and blocking light beams of other wavelengths from being transmitted. 6 . Pass. 6. The imaging device according to claim 5, further comprising a first substrate provided under the light detection layer, and a second substrate provided above the filter layer, the small A lens is provided on the second substrate. 7 . The imaging device according to claim 1 , further comprising light-shielding layers arranged at intervals corresponding to the small lenses, the light-shielding layers are used to block the transmission of light beams; or the light-shielding layers can transmit the light-shielding layers. 8 . Image beams but block other wavelength beams. 8 . The imaging device according to claim 7 , further comprising a protective layer disposed above the small lenses, the protective layer covering the small lenses and/or the light shielding layer. 9 . 9. The imaging device according to claim 1, wherein the imaging beam is a detection beam reflected by an external object, and the detection beam comes from a light-emitting module capable of emitting a detection beam for biometric detection; or The imaging light beam is a light beam that an external object transmits the detection light beam entering the interior thereof as an imaging light beam, and the imaging light beam is visible light and/or invisible light, and the invisible light includes near-infrared light. 10. The imaging device according to any one of claims 1 to 9, wherein the small lens satisfies one or more of the following conditions: a diameter of 50-800 microns; a sagittal height of 0.6 to 100 microns ; The radius of curvature is 30 to 1000 microns; the focal length is 15 to 1000 microns. 11. A lens assembly, characterized by comprising the small lens of the imaging device according to any one of claims 1 to 10. 12 . A biometric detection system, characterized by comprising the imaging device of any one of claims 1 to 10 or the lens assembly of claim 11 . 13 .

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