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 biological characteristic detection system

Technical Field

The utility model relates to the field of photoelectric technology, especially, relate to a lens subassembly, imaging device and biological characteristic detecting system.

Background

With the technical progress and the improvement of living standard of people, users demand more functions and fashionable appearance for electronic products such as mobile phones, tablet computers, cameras and the like. At present, most of electronic products including mobile phones acquire biological characteristic information of external objects in an optical imaging mode, and an imaging device for acquiring imaging light beams with the biological characteristic information is limited by an optical imaging structure, is usually large in size, and needs to occupy a large space.

SUMMERY OF THE UTILITY MODEL

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

An aspect of the utility model provides an imaging device, including the light detection layer with set up a plurality of small lenses on the light detection layer, 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.

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

In some embodiments, different directions of imaging beams transmitted through a lenslet can be received by different pixel elements.

In certain embodiments, the lenslets cover 100-10000 pixel elements, or the lenslets cover a 10 x 10 to 100 x 100 array of pixel elements.

In some embodiments, the optical detection device further comprises a filter layer disposed on the light detection layer, wherein the filter layer is used for transmitting the imaging light beam and blocking light beams with other wavelengths from transmitting.

In some embodiments, the optical detection device further comprises a first substrate disposed below the light detection layer, and a second substrate disposed above the light filter layer, the lenslets being disposed on the second substrate.

In some embodiments, the light source further comprises a light shielding layer arranged corresponding to the interval of the small lens, and the light shielding layer is used for blocking the light beam; or the light shielding layer can transmit the imaging light beam but block other wavelength light beams.

In some embodiments, a protective layer disposed over the lenslets is also included, the protective layer covering the lenslets and/or light shielding layer.

In some embodiments, the imaging beam is a detection beam reflected from an external object, the detection beam from a light emitting module capable of emitting a detection beam for biometric detection; or the imaging light beam is transmitted by an external object to the detection light beam entering the internal part, the imaging light beam is visible light and/or invisible light, and the invisible light comprises near infrared light.

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

An aspect of the present invention provides a lens assembly, a lenslet comprising the above-mentioned imaging device.

An aspect of the present invention provides a biometric detection system, comprising the lens assembly as described above, or comprising the imaging device as described above.

The beneficial effects of the utility model reside in that, the utility model discloses an imaging device and lens subassembly include a plurality of small lenses, the small lens will have the image beam of biological characteristic information to converge on the pixel unit through the lens principle of imaging, the pixel unit is received image beam truns into for the signal of telecommunication into. Due to the small size and volume of the small lens and the small focal length, the thickness of the imaging device can be greatly reduced. In addition, by means of lens imaging, the area of the light detection layer of the imaging device for photosensitive imaging can be smaller than the area of an external object actually sensed, so that the whole volume of the imaging device is small. Therefore, the utility model discloses a less volume can be realized to lens subassembly, imaging device and biological characteristic detecting system, and is less to the space requirement, can be applicable to display device and the portable equipment that the high screen accounts for the ratio, has better user experience.

Drawings

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

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

FIG. 3 is a schematic view of one embodiment of the imaging device shown in FIG. 1;

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

FIG. 5 is a schematic view of one embodiment of the imaging device shown in FIG. 1;

FIG. 6 is a schematic view of one embodiment of the biometric detection system of the present invention;

FIG. 7 is a schematic view of one embodiment of the biometric detection system of the present invention;

FIG. 8 is a schematic view of one 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 Description

In the detailed description of the embodiments of the invention, it will be understood that when a substrate, a sheet, a layer, or a pattern is referred to as being "on" or "under" another substrate, another sheet, another layer, or another pattern, it can be "directly" or "indirectly" on the other substrate, the other sheet, the other layer, or the other 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 clarity. Further, the sizes of the elements in the drawings do not completely reflect actual sizes.

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Fig. 1 is a partial perspective view of an imaging device 10 according to an embodiment of the present invention. Fig. 2 is a partial cross-sectional view of the side of the imaging device 10.

The imaging device 10 comprises a light detection layer 11 and a lens assembly (not numbered) arranged above the light detection layer 11. The Lens assembly includes a plurality of lenslets (Mini-Lens) 15.

In this embodiment, the imaging device 10 further includes a light shielding layer 14 disposed at intervals corresponding to the small lenses 15, and the light shielding layer is used for blocking light beams from passing through; or the light-shielding layer can transmit the imaging light beam 102 with the biometric information but block other wavelength light beams. For example, but not limited to, the light shielding layer 14 is a black matrix (black matrix) material.

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

In this embodiment, the optical detection device further includes a first substrate 16 disposed below the photodetection layer, and a second substrate 13 disposed above the filter layer 12, the small lenses 15 being disposed on the second substrate 13, and the light shielding layer 14 being disposed on the second substrate 13 so as to cover the spaces between the small lenses 15 on the second substrate 13.

In this embodiment, the imaging device further comprises a protective layer 17 (not shown in FIG. 1) disposed over the lenslets 15. The protective layer 17 may be used to protect the lenslets 15. For example, but not limited to, the protective layer may function as a moisture barrier, a dust barrier, a scratch barrier, and the like. In some embodiments, the protective layer 17 covers the light-shielding layer 14 and/or lenslets 15.

It is understood that the configuration shown in fig. 2 is merely illustrative and that a protective cover and/or optical coating, lens, prism, optical film, or other optical element capable of transmitting the imaging beam 102 may be disposed between the external object 1000 and the imaging device 10. The imaging beam 102 is a beam with biometric information from an external object 1000.

In some embodiments, the imaging beam 102 is a detection beam reflected from the external object 1000, the detection beam coming from a light emitting module (not shown) capable of emitting a detection beam for biometric detection; or the imaging beam 102 is a beam transmitted by the external object 1000 from the detection beam entering the inside thereof.

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

In some embodiments, the imaging light 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 imaging beam 102 is not limited in the present application, and can be received by the imaging device 10 and converted into a corresponding electrical signal, and can be further used for biometric detection, and/or image generation, and/or spatial coordinate detection, and/or living body detection, and can be regarded as the imaging beam 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 is capable of transmitting through the protective layer 17 while other wavelength light beams are not capable of transmitting through the protective layer 17.

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

In some embodiments, the light detection layer includes a light sensor for receiving an imaging light beam and converting into a corresponding electrical signal. For example, but not limiting of, 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 entirely omitted.

The lenslets 15 may be made of transparent glass, or transparent resin, or other transparent material. The lenslets 15 have an upwardly convex spherical or aspherical upper surface. The imaging beam 102 can enter the lenslets 15 through the upper surfaces of the lenslets 15 and pass through the lenslets 15. The lenslets 15 have a converging effect on the imaging beam 102. The lenslets 15 may be segment structures. Visible light can also be transmitted through the lenslets 15, such as visible light from the external environment or visible light reflected or emitted by the external object 1000.

In some embodiments, the lenslets 15 are made of a transparent material. Further, the lenslets 15 are made of transparent glass or plastic, and visible light and/or near infrared light can pass through the lenslets 15.

In some embodiments, the lenslets 15 are made using translucent or opaque materials. Further, visible light or near infrared light can be transmitted through the lenslets 15, or near infrared light can be transmitted through the lenslets 15 but visible light cannot be transmitted through the lenslets 15. Further, the lenslet 15 surfaces may be coated with an optical coating, such as, but not limited to, infrared ink that 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 lenslets 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 beams 102 and convert the imaging light beams into corresponding electrical signals. The lower surfaces of the lenslets 15 are circular planes, and the imaging light beam 102 can exit from the lower surfaces of the lenslets 15 and further pass through the second substrate 13 and the filter layer 12 to reach the pixel unit 111.

In this embodiment or the modified embodiment, the imaging light beams 102 transmitted from one small lens 15 may have different emission directions, so that the imaging light beams 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 convenience of description, a plurality of pixel units 111 capable of receiving the imaging light beams 102 transmitted by the same lenslet 15 are referred to as pixel units 111 covered by the lenslet 15. For example, but not limiting of, one lenslet 15 may cover an array of 10 × 10 pixel elements 111, or an array of 100 × 100 pixel elements 111, or an array of pixel elements 111 of sizes between 10 × 100, or 100-10000 pixel elements 111.

In this embodiment or 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 and converted into a corresponding electrical signal on the pixel unit 111. For example, but not limiting of, the imaging beam 102 is used to generate image data with biometric information of the external object 1000. According to the focal length of the small lens 15, the object distance of the external object 1000 and the image distance relationship of the pixel unit 111, the photosensitive area of the light detection layer 11 and the area ratio of the external object 1000 capable of being detected by the imaging device 10 can be obtained.

In the prior art, the receiving of the imaging light beam 102 is generally in a pinhole imaging mode in which a microlens is disposed on a pixel unit, or in an imaging mode in which a collimation mode is adopted for optical path guidance. The area of a photosensitive component, such as a light detection array, in the prior art needs to be large to receive sufficient biometric information for identification of an external object, and the area of the light detection array of a typical photosensitive component needs to be larger than or equal to the area of a detection area. Taking fingerprint detection as an example, the detection area is usually an area on the upper surface of the protective cover plate for a user to touch with a finger. A "detection zone" (or "sensing zone") 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 zone is for example, but not limited to, 4mm by 4mm to 20mm by 20 mm. The area of the light detection array is generally required to be greater than or equal to the size of the area of the actually detected fingerprint, or not less than the size of the area of the detection area.

The imaging device 10 of the present embodiment and the modified embodiments can detect a large area region of an external object by using a small area light detection array by imaging through the lens of the small lens 15, and the area of the imaging device 10 is smaller than the area of the external object actually detected or smaller than the area of the detection region. Thereby saving cost and space.

In some embodiments, the lenslets 15 may have one or more of a segment structure, a mesa structure, or a step structure. Of course, the lenslets 15 may have other convex structures, and the present invention is not particularly limited.

In some embodiments, the external object 1000 may receive a detection beam of near infrared light having a wavelength in a range of about 800-1000 nm (nanometers) that 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 an 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 a structure of a Lens assembly of Mini-Lens. A large lens, a lens barrel, etc. may be omitted to have a small size and volume.

In some embodiments, the lenslets 15 also include a lower surface, which may be circular, elliptical, square, polygonal, or other shape that meets the requirements of the chip design.

In some embodiments, the lenslets 15 further comprise a lower surface having a convex curvature.

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

In some embodiments, the lenslets 15 are about 50-800 microns in diameter.

In some embodiments, the lenslets 15 have a rise of about 0.6 microns to about 100 microns.

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

In some embodiments, the lenslets 15 have focal lengths in the range of about 15 microns to about 1000 microns.

The light-shielding layer 14 may also be referred to as a black matrix (black matrix), which is generally made of a black light-absorbing material. The light-shielding layer 14 is capable of absorbing the visible and near infrared imaging light beams 102. The light shielding layer 14 corresponds to the space covering the plurality of lenslets 15, so that the imaging light beam 102 does not pass through the space between the lenslets 15.

In some embodiments, the lenslets 15 may or may not have a space therebetween, or some of the lenslets 15 may have a space therebetween and another portion of the lenslets 15 may not have a space therebetween, and the invention is not limited in particular.

The lenslets 15 and the light-shielding layer 14 are disposed on the second substrate 163, and the second substrate 13 may be made of a transparent polymer material, such as but not limited to pet (polyethylene terephthalate) film as the second substrate 13. The imaging beam 102 is transparent to the second substrate 13.

The filter layer 12 includes a near Infrared filter (Infrared filter), and the filter layer 12 is capable of transmitting near Infrared light and absorbing or reflecting light beams of other wavelengths. For example, but not limited to, the filter layer 12 can transmit light beams with a wavelength ranging from 800 nm to 1000nm, or the filter layer 12 can transmit near infrared light with a wavelength of 840nm or 950nm and block other light beams with other wavelengths from transmitting.

The photodetection layer 11 includes a photodetection array, and a readout circuit and other auxiliary circuits electrically connected to the photodetection array. The light detecting array is a photo detector array, which includes a plurality of photo detectors distributed in an array, and the photo detectors may be used as pixel units 111. In this embodiment, the light detection layer 11 includes a plurality of pixel units. The plurality of pixel units 111 are arranged in an array on the first substrate 166, for example, but not limited to. The pixel unit is configured to receive the imaging light beam 102 and convert the imaging light beam into a corresponding electrical signal. The electrical signal may be processed by the light detection layer 11 to obtain image data (e.g., without limitation, fingerprint image data) of an external object 1000 (e.g., without limitation, 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 pixel cell 111 has an area size of about 5 microns by 5 microns to about 10 microns by 10 microns.

Taking fingerprint detection as an example, when fingerprint detection is performed, a finger touches one detection area on the upper surface of the protective cover 177. When the finger touches the detection area, since the distance from the ridge (ridge) of the finger to the protective cover 117 and the distance from the valley (valley) to the protective cover 117 are different, when the imaging light beam 102 enters the imaging device 10 from the finger, the refractive index or reflectivity of the imaging light beam 102 is different for different areas of the ridge and valley, so that different imaging light beams 102 from the ridge and valley have different light intensities (the brightness of the light beams can be considered to be different) when reaching the pixel unit 111. The imaging device 10 is capable of acquiring fingerprint image data with information of ridges and valleys of a finger by the imaging device 10 by collecting the imaging light beam 102 formed by reflection or transmission of 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.

Referring to fig. 3, the imaging device 10 is used for remotely detecting the biometric characteristic of the external object 1000. The external object 1000 is now a face, iris or other. The imaging light beam 102 emitted or reflected by the external object 1000 is transmitted through the lenslets 15 to be received by the pixel unit 11 and converted into a corresponding electrical signal, such as, but not limited to, an image signal for biometric detection. The imaging light beam 102 may include visible and/or invisible light, such as visible and/or near infrared light. The visible light can be a light beam with a wavelength range of 400-700 nm, and the near infrared light can be a light beam with a wavelength range of 800-1000 nm.

Alternatively, in some embodiments, the light shielding layer 14 may be disposed at different positions. In the embodiment shown in fig. 4, the light-shielding layer 14 is disposed 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 lenslets 15. As shown in fig. 5, the light shielding layer 14 is provided between the photodetection layer 11 and the filter layer 12, and the light shielding layer 14 has light-transmitting holes (not numbered) corresponding to the small lenses 15.

Compared with the prior art, the imaging device 10 adopts Mini-lens to replace the existing large lens to converge the imaging light beam 102, the imaging device 10 utilizes the lens imaging principle to image, so the area or the size of the imaging device 10 can be smaller or smaller. The above or modified embodiment of the present invention describes that the imaging device 10 adopts Mini-lens and the matching design to realize different situations of small size and small volume, and certainly, the imaging device 10 can also have other settings, and those skilled in the art can understand 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 subjected to the modification setting such as limited test, all belong to the protection scope of the present invention. Meanwhile, the structure, principle and arrangement of the imaging device 10 and the Mini-lens in the above embodiment or the modified embodiment and the corresponding modified arrangement can also be applied to the other embodiments disclosed in the present invention, and the embodiment and the replacement, deformation, combination, detachment, extension, etc. obtained from this all belong to the protection scope of the present invention.

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

Referring to fig. 6, a schematic diagram of an embodiment of the imaging device 10 used in the biometric detection system of the present invention is shown. The biometric detection system includes a display device (not numbered) and an imaging device 10. The imaging device 10 is disposed below or to the side of the display device.

In this embodiment, the display device includes a backlight module 21, a display panel 22 and a protective cover plate 23 sequentially arranged from bottom to top. The imaging device 10 is disposed below the backlight module 21, and the imaging device 10 receives the imaging light beam 102 emitted or reflected by the 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 or the like. Such as, but not limited to, a Liquid Crystal Display (LCD) or 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.

Referring to fig. 7, a schematic diagram of an embodiment of the imaging device 10 used in the biometric detection system of the present invention is shown. The biometric detection system includes a display device (not numbered) and an imaging device 10. The imaging device 10 is disposed below or to the side of the display device. The display device is used for image display, and the imaging device 10 is used for receiving an imaging light beam 102 through at least part of the display device, wherein the imaging light beam 102 carries the biological characteristic 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 plate 23 sequentially arranged from bottom to top. The imaging device 10 is disposed in a space between the lower side of the protective cover 23 and the upper side of the backlight module 21 and is located at one side of the display panel 22. The imaging device 10 receives the imaging light beam 102 formed by reflection or transmission of the external object 1000 through the protective cover 23, wherein the reflection includes the external object 1000 reflecting the detection light beam emitted from one emission unit as the imaging light beam 102; the transmission includes the external object 1000 transmitting the detection beam entering the inside thereof 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, or the like.

Referring to fig. 8, a schematic diagram of an embodiment of the imaging device 10 used in the biometric detection system of the present invention is shown. The biometric detection system includes a display device (not numbered) and an imaging device 10. The imaging device 10 is disposed below or to the side of the display device. The display device is used for image display, and the imaging device 10 is used for receiving an imaging light beam 102 through at least part of the display device, wherein the imaging light beam 102 carries the biological characteristic 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 plate 23 sequentially arranged 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 an imaging light beam 102 emitted or reflected by an external object 1000 through the protected cover 23. The display panel 22 is, for example, but not limited to, a liquid crystal display panel, an electronic paper panel, or the like.

Referring to fig. 9, a schematic diagram of an embodiment of the imaging device 10 used in the biometric detection system of the present invention is shown. The biometric detection system includes a display device (not numbered) and an imaging device 10. The imaging device 10 is disposed below or to the side of the display device. The display device is used for image display, and the imaging device 10 is used for receiving an imaging light beam 102 through at least part of the display device, wherein the imaging light beam 102 carries the biological characteristic information of the external object 1000.

The display device comprises a substrate 31, a light-emitting layer 32 and a protective cover plate 33 which are arranged in sequence from bottom to top. The image forming apparatus 10 is disposed under the protective cover 33 on one side of the substrate 31 and the light emitting layer 32. The imaging device 10 receives an imaging light beam 102 emitted or reflected by an external object 1000 through the protective cover 33. The light emitting layer 32 includes, but is not limited to, an Organic Light Emitting Diode (OLED), an LED, a Mini-LED, or a Micro-LED, etc.

In some embodiments, the imaging device 10 or the biometric detection system may further include a processor and a memory (not shown), wherein the processor is capable of obtaining two-dimensional information and/or depth information of the external object 1000 from the imaging beam 102 received by the imaging device 10. Such as, but not limited to, an Application Processor (AP), a Central Processing Unit (CPU), a Microcontroller (MCU), etc.

Further, the memory may also store the biometric information data in advance, and the processor may be configured to perform two-dimensional and/or three-dimensional biometric detection and identification of the external object by comparing the obtained two-dimensional information and/or depth information of the external object 1000 with the pre-stored biometric information data, such as but not limited to: two-dimensional and/or three-dimensional fingerprint detection, face detection, iris detection, subcutaneous capillary detection, and the like.

In some embodiments, the biometric detection system further comprises an emission unit for emitting a detection beam, the imaging beam 102 being obtained by reflection of the detection beam by the external object 1000 or transmission of the detection beam, wherein the transmission comprises transmission of the detection beam by the external object 1000 into its interior as the imaging beam 102. The detection Light beam may include one or more of Flood Light (Light beam with a wide illumination area and a divergent illumination angle), speckle structured Light, coded structured Light, and modulated pulse signals.

The imaging device 10 receives the imaging light beam 102 reflected or emitted by the external object 1000 and acquires the biometric information or image information of the external object 1000, thereby being capable of detecting the biometric information of the external object 1000, and/or performing image rendering on the external object 1000, and/or detecting the spatial coordinates of the external object 1000. Such as but not limited to: fingerprint detection, body temperature detection, heart rate detection, living body detection and the like.

In the above embodiment or other embodiments, the areas/locations 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 light beam 102 and may 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 spatial coordinate detection of the external object 1000.

In the above-described embodiment or modified embodiment, the external object 1000 may be a finger, and the biometric detection system 1 may be capable of fingerprint detection and recognition. However, the utility model discloses be not limited to external object 1000, in some other change embodiments, external object 1000 can also be face, palm, iris, blood vessel etc., biological feature detecting system 1 can also be used for detecting external object 1000's facial feature, iris feature, palm print, rhythm of the heart, body temperature etc..

By detecting and identifying the biological characteristics of the external object 1000, the biological characteristic detection system 1 can be used for locking or unlocking a device, verifying online payment services, verifying the identity of a financial system or a public security system, verifying the passage of an access control system and other various products and application scenarios.

The biometric detection system 1 can also be applied to application scenes such as photographing, modeling, and the like 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 involving direction, distance, speed, etc. by detecting the spatial coordinates of the external object 1000.

Thus, the biometric detection system 1 can be used for biometric detection and recognition of external objects in two and/or three dimensions, or for image rendering of external objects in two and/or three dimensions, or for spatial coordinate detection of external objects in two and/or three dimensions. In the embodiments and modifications of the present invention, the external object 1000 includes, but is not limited to, a finger, a fingerprint, an eye, an iris, a subcutaneous blood vessel, a face, etc.

The biological characteristic detection system can be a mobile phone, a tablet personal computer, an intelligent watch, an augmented reality/virtual reality device, a human body action detection device, an automatic driving automobile, intelligent household equipment, security equipment, an intelligent robot, a medical instrument or a component thereof and the like.

Compared with the prior art, the utility model discloses an imaging device 10 and lens subassembly include a plurality of small lenses, the small lens will have the formation of image light beam of biological characteristic information to converge on the pixel unit through the lens principle of imaging, because the small lens volume is less with the size, and its focus is less, imaging device's thickness can reduce greatly. In addition, by means of lens imaging, the area of the light detection layer of the imaging device for photosensitive imaging can be smaller than the actually sensed external object area, so that the whole volume of the imaging device is small. Therefore, the utility model discloses a less volume can be realized to lens subassembly, imaging device and biological characteristic detecting system, and is less to the space requirement, can be applicable to display device and the portable equipment that the high screen accounts for the ratio, has better user experience.

It should be noted that, those skilled in the art can understand that, without creative efforts, some or all of the embodiments of the present invention, and some or all of the deformation, replacement, alteration, split, combination, extension, etc. of the embodiments should be considered as covered by the inventive idea of the present invention, and belong to the protection scope of the present invention.

Any reference in this specification to "one embodiment," "an embodiment," "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 invention. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment. Further, when a particular feature or structure is described in connection with any embodiment, it is submitted that it is within the purview of one skilled in the art to effect such feature or structure in connection with other ones of the embodiments.

The orientations or positional relationships indicated in the specification of "length", "width", "upper", "lower", "left", "right", "front", "rear", "back", "front", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., which may appear in the present invention, are orientations or positional relationships indicated on the basis of the drawings, and are only for convenience of describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Like reference numbers and letters refer to like items in the figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Meanwhile, in the description of the present invention, the terms "first", "second", and the like are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance. In the description of the present invention, "plurality" or "a plurality" means at least two or two unless specifically defined otherwise. In the description of the present invention, it should be noted that, unless explicitly stated or limited otherwise, "disposed," "mounted" or "connected" is to be understood in a broad sense, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. The terms used in the following claims should not be construed to limit the invention to the specific embodiments disclosed in the specification. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (12)

1. An imaging device comprises a light detection layer and a plurality of small lenses arranged on the light detection layer, wherein the light detection layer comprises a plurality of pixel units, each small lens faces the plurality of pixel units, and the pixel units receive imaging light beams with biological characteristic information through the small lenses and convert the imaging light beams into corresponding electric signals.

2. The imaging device of claim 1, wherein the light detection layer is a light sensor that receives the imaging light beam and is configured to generate corresponding image data, the light sensor comprising an infrared light sensor.

3. The imaging apparatus of claim 1, wherein different directions of the imaging beams transmitted through a lenslet can be received by different pixel elements.

4. The imaging apparatus of claim 1, wherein the lenslets cover 100-10000 pixel elements, or 10 x 10 to 100 x 100 pixel element arrays.

5. The imaging device of claim 1, further comprising a filter layer disposed on the light detection layer, the filter layer configured to transmit the imaging light beam and block light beams of other wavelengths from passing therethrough.

6. The imaging device of claim 5, further comprising a first substrate disposed below the light detection layer, and a second substrate disposed above the light filter layer, the lenslets being disposed on the second substrate.

7. The imaging device as claimed in claim 1, further comprising a light shielding layer disposed corresponding to the interval of the small lens, wherein the light shielding layer is used for blocking the light beam; or the light shielding layer can transmit the imaging light beam but block other wavelength light beams.

8. The imaging apparatus of claim 7, further comprising a protective layer disposed over the lenslets, the protective layer covering the lenslets and/or light shielding layer.

9. The imaging apparatus of claim 1, wherein the imaging beam is a detection beam reflected from an external object, the detection beam from a light emitting module capable of emitting a detection beam for biometric detection; or the imaging light beam is a light beam which is transmitted by an external object as an imaging light beam by the detection light beam entering the external object, wherein the imaging light beam is visible light and/or invisible light, and the invisible light comprises near infrared light.

10. The imaging apparatus of any of claims 1-9, wherein the lenslets satisfy one or more of the following conditions: the diameter is 50-800 microns; the rise is 0.6 to 100 microns; the curvature radius is 30-1000 microns; the focal length is 15-1000 microns.

11. A lens assembly comprising a lenslet of the imaging device of any one of claims 1 to 10.

12. A biometric detection system comprising an imaging device according to any one of claims 1 to 10 or a lens assembly according to claim 11.

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