WO2024001797A1 - Dispositif d'identification et dispositif électronique - Google Patents

Dispositif d'identification et dispositif électronique Download PDF

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Publication number
WO2024001797A1
WO2024001797A1 PCT/CN2023/100287 CN2023100287W WO2024001797A1 WO 2024001797 A1 WO2024001797 A1 WO 2024001797A1 CN 2023100287 W CN2023100287 W CN 2023100287W WO 2024001797 A1 WO2024001797 A1 WO 2024001797A1
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WIPO (PCT)
Prior art keywords
light
module
reflective
identification device
incident
Prior art date
Application number
PCT/CN2023/100287
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English (en)
Chinese (zh)
Inventor
施祖传
李战涛
蔡奇
叶海水
Original Assignee
华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Publication of WO2024001797A1 publication Critical patent/WO2024001797A1/fr

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Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
    • G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
    • G06V40/14—Vascular patterns
    • G06V40/145—Sensors therefor

Definitions

  • the embodiments of the present application relate to the technical field of electronic equipment, and in particular, to an identification device and an electronic equipment.
  • Biometric identification technology uses automatic technology to measure the biological characteristics of the human body based on identity authentication requirements, and compares them with characteristic templates collected or entered in advance to complete identity verification.
  • Biometric characteristics refer to unique, measurable or identifiable physiological characteristics, such as fingerprints, faces, irises, veins, etc.
  • finger veins are an emerging biometric feature, which has the advantages of fast recognition speed, high accuracy, living body recognition, in-body characteristics, non-contact, and high user acceptance.
  • the hemoglobin in the veins has the characteristics of absorbing infrared rays.
  • other tissues of the fingers such as muscles and dermis, absorb less infrared rays. Therefore, when the fingers are irradiated with infrared light, a dark vein image can be formed.
  • Medical research shows that each person’s finger vein network characteristics are unique, making them capable of becoming identity authentication features.
  • the vein identification device includes an infrared light source, an infrared filter and a camera. As shown in Figure 1, the infrared light source can emit narrow-wave infrared light.
  • the infrared light will be scattered when it shines on the finger, and part of the infrared light will shine through the finger to the camera.
  • the camera receives the infrared light to form an infrared image of the finger, and the veins in the finger have strong infrared absorption and will show dark stripes, so an image of the vein pattern can be obtained, which becomes an identifiable feature.
  • the thickness of the identification device is large, which is not conducive to the thinning and miniaturization of the identification device.
  • Embodiments of the present application provide an identification device and electronic equipment, which solve the problem that the existing identification device has a large thickness and is not conducive to the thinning and miniaturization design of the identification device.
  • the first aspect of the application provides an identification device, including: a light-emitting module, a reflective module and a camera module.
  • the reflective module includes a reflective surface.
  • the light-emitting module is used to emit infrared light.
  • the infrared light is scattered by the object to be measured to form an incident beam.
  • the reflection The surface is used to reflect the incident beam to form an imaging beam
  • the camera module is used to receive the imaging beam to form an infrared image of the object to be measured.
  • the reflection module realizes the refraction of the optical path between the object to be measured (such as a finger) and the camera module, which can reduce the length of the object distance in the thickness direction, thereby reducing the thickness of the recognition device.
  • the reflective surface is a plane, the reflective surface is inclined to the horizontal plane, and the reflective surface and the horizontal plane form a first included angle, and the first included angle is less than 45°.
  • the smaller the value of the first included angle ⁇ the smaller the distance from the end of the reflective module away from the finger to the finger (or the light-emitting module), so the value of the first included angle ⁇ is smaller than 45°. It can further reduce the size of the entire identification device in the thickness direction, achieving miniaturization and reduction of the identification device. Thinning.
  • the identification device can have a smaller thickness and better imaging performance, while meeting high imaging quality and miniaturization and thinning design requirements.
  • the reflection module at least includes a reflection mirror, that is, the reflection module can be composed of a single reflection mirror, which has a simple structure and is easy to implement.
  • an infrared filter is also included, and the infrared filter is used to transmit the incident light beam and filter out ambient light other than infrared light.
  • Infrared filters can transmit infrared light, filter out ambient light in other light bands except infrared light, and improve imaging quality.
  • the second aspect of the application provides an identification device, which includes a light-emitting module, a reflective module and a camera module.
  • the reflective module includes a reflective surface.
  • the light-emitting module is used to emit infrared light.
  • the infrared light is scattered by the object to be measured to form an incident beam.
  • the reflective surface It is used to reflect the incident beam to form an imaging beam, and the camera module is used to receive the imaging beam to form an infrared image of the object to be measured.
  • the reflective surface is a convex surface.
  • the imaging rules the light beam is reflected by the convex surface to form a reduced image. That is to say, when reflecting the same size image, the size of the reflective surface required by the reflective module is relatively small, which can reduce the reflection.
  • the thickness of the module thereby reduces the thickness of the entire identification device, thereby achieving the purpose of miniaturization and thinning of the identification device.
  • the convex surface at least includes a sphere, a quadratic surface or a free-form surface.
  • the radius of curvature of the convex surface is 10mm-200mm.
  • the distortion can be reduced and the compensation for the distortion can be easily realized, which is conducive to ensuring the imaging quality.
  • the reflection module at least includes a reflection mirror.
  • an infrared filter is also included, and the infrared filter is used to transmit the incident light beam and filter out ambient light other than infrared light.
  • the third aspect of the present application provides an identification device, which includes a light-emitting module, a reflective module and a camera module.
  • the reflective module includes a light-incident surface, a reflective surface and a light-emitting surface.
  • the light-emitting module is used to emit infrared light.
  • the infrared light is scattered by the object to be measured to form an incident beam.
  • the incident surface is used to transmit the incident beam to the reflective surface.
  • the reflective surface is used to reflect the incident beam to the light-emitting surface.
  • the light-emitting surface is used to transmit the incident light to the light-emitting surface.
  • the light beam passes through to form an imaging beam, and the camera module is used to receive the imaging light beam to form an infrared image of the object to be measured.
  • At least one of the light incident surface, the reflective surface and the light emergent surface is a curved surface.
  • the curved surface is a convex surface that bulges toward the inside of the reflection module.
  • the curved surface is a convex surface that faces the inside of the reflective module. The raised convex surface on the outside of the reflective module.
  • the incident beam enters the reflective module through the light incident surface and is irradiated to the reflective surface.
  • the reflective surface converts the incident beam into It is reflected to the light-emitting surface, and the light-emitting surface allows the incident light beam to pass through to form an imaging light beam that is output from the reflective module.
  • the light beam can form a reduced image when passing through the convex surface or being reflected by the convex surface, so that the light-incoming surface and the light-emitting surface are convex surfaces convex toward the outside of the reflective module, and the reflective surface is a convex surface convex toward the inside of the reflective module, which can reduce the thickness of the reflective module. , thereby reducing the thickness of the entire identification device.
  • the light-incident surface and the light-emitting surface are both flat surfaces, and the reflective surface is a convex surface.
  • the incident light beam shines through the light incident surface onto the convex reflecting surface, and the light beam is reflected by the convex surface to form a reduced image.
  • the reflective surface reflects the incident light beam to the light exit surface.
  • the reflective surface and the light-emitting surface are both flat surfaces, and the light-incident surface is a convex surface.
  • the incident light beam passes through the convex light incident surface and shines on the reflective surface.
  • the light beam passes through the convex surface to form a reduced image. Therefore, the size of the required reflective surface and light exit surface is smaller, and the size of the reflective module can also be reduced. thickness.
  • the reflective surface is a flat surface, and both the light-incident surface and the light-emitting surface are convex surfaces.
  • the incident light beam passes through the convex light incident surface to achieve a reduction in imaging and reduce the thickness of the required reflective surface and light exit surface.
  • the reflective surface reflects the incident light beam to the light-emitting surface, and the incident light beam passes through the outwardly convex light-emitting surface to form an imaging beam, and is irradiated to the camera module to form an infrared image of the finger vein.
  • the light-emitting surface can achieve a secondary reduction in imaging, further reduce the required thickness dimensions of the reflective surface and the light-emitting surface, and further reduce the thickness of the reflective module.
  • the reflection module is a triangular prism. It has higher setting stability, is conducive to improving the reliability of the identification device, and is easy to assemble and implement.
  • two ends of the light incident surface intersect with the first end of the light exit surface and the first end of the reflective surface respectively.
  • the reflective module has a flat-angle structure on one end opposite to the light-incident surface to remove part of the reflective surface and the light-emitting surface.
  • the two ends of the flat-angle structure intersect with the second end of the light-emitting surface and the second end of the reflective surface respectively.
  • an infrared filter is also included, and the infrared filter is used to transmit the incident light beam and filter out ambient light other than infrared light.
  • a fourth aspect of the present application provides an electronic device, including a housing and any one of the above identification devices, and the identification device is disposed in the housing.
  • the identification device By including an identification device, the identification device has a smaller thickness while ensuring imaging performance, which is conducive to meeting the miniaturization and thinning design requirements of electronic equipment.
  • the infrared image includes a preset infrared image or an infrared image to be identified.
  • the processing module is used to obtain the preset infrared image and the infrared image to be identified respectively.
  • the processing module is also used to compare the preset infrared image and the infrared image to be identified, and obtain the comparison result. .
  • Figure 1 is a schematic structural diagram of an electronic device provided by an embodiment of the present application.
  • Figure 2 is a schematic structural diagram of another electronic device provided by an embodiment of the present application.
  • FIG. 3 is a schematic structural diagram of an identification device in the related art
  • FIG. 4 is a schematic structural diagram of an identification device provided by an embodiment of the present application.
  • Figure 5 is a simulation diagram of an identification device provided by an embodiment of the present application.
  • Figure 6 is a simulation diagram of a recognition device in a comparison group provided by an embodiment of the present application.
  • FIG. 7 is a schematic structural diagram of another identification device provided by an embodiment of the present application.
  • Figure 8 is a schematic structural diagram of a reflection module in another identification device provided by an embodiment of the present application.
  • Figure 9 is a simulation diagram of another identification device provided by an embodiment of the present application.
  • FIG. 10 is a schematic structural diagram of another identification device provided by an embodiment of the present application.
  • FIG 11 is a schematic structural diagram of yet another identification device provided by an embodiment of the present application.
  • Figure 12 is a schematic structural diagram of another identification device provided by an embodiment of the present application.
  • Figure 13 is a schematic structural diagram of yet another identification device provided by an embodiment of the present application.
  • Figure 14 is a schematic structural diagram of another identification device provided by an embodiment of the present application.
  • Figure 15 is a schematic structural diagram of yet another identification device provided by an embodiment of the present application.
  • An electronic device provided by the embodiment of the present application may include door locks, safes, attendance machines, mice, car handles and other devices, and may also include convenient mobile terminals such as mobile phones, tablet computers, notebook computers, smart watches, and personal digital assistants. equipment.
  • the electronic device and the identification device are explained by taking the electronic device as a door lock as an example.
  • the electronic device may include a housing and an identification device, and the identification device may be disposed in the housing.
  • the identification device can be used to obtain an image of the object to be tested to identify the characteristics of the object to be measured.
  • the feature can be a biological characteristic, for example, a fingerprint of a finger.
  • the identification device can be used to obtain an image of the finger fingerprint to identify the fingerprint. identification. Alternatively, it can also be a finger vein, and the identification device can be used to obtain a finger vein image to identify the finger vein.
  • the feature can also be other designated features, for example, it can be blood oxygen.
  • the identification device can be used to obtain a distribution image of blood oxygen in a living body to realize the identification and detection of blood oxygen concentration.
  • the implementation of authentication and identification of electronic equipment is explained by taking the identification device to obtain a finger vein image and thereby realizing the identification of finger veins as an example.
  • FIG. 1 is a schematic structural diagram of an electronic device provided by an embodiment of the present application.
  • the electronic device may also include a processing module 400.
  • the processing module 400 may be a processor and may have functions such as computing, storing, and processing data. Among them, as shown in Figure 1, the processing module 400 can be integrated in the identification device 100, That is, the recognition device 100 includes the processing module 400. Specifically, the processing module 400 can be connected to the camera module 30 of the recognition device 100. The camera module 30 can form an infrared image of the finger vein and transmit it to the processing module 400.
  • the infrared image of the user's finger veins can be obtained for the first time through the identification device 100.
  • This image is a preset infrared image
  • the camera module 30 can transmit the formed preset infrared image to the processing module. 400.
  • the processing module 400 can store and process the preset infrared image.
  • the camera module 30 of the identification device 100 can obtain the infrared image of the finger vein again, and use this image as the infrared image to be identified.
  • the camera module 30 can transmit the obtained infrared image to be identified to the processing module 400 for processing.
  • the module 400 can compare the infrared image to be identified and the preset infrared image, and obtain a comparison result.
  • the comparison result can be that the infrared image to be identified and the preset infrared image are the same, or that the infrared image to be identified is the same as the preset infrared image. Infrared images are different.
  • the electronic device can identify the user's identity based on the comparison results.
  • the electronic device may also include a main control module 500 and a lock structure 300.
  • the main control module 500 is used to implement overall control of the electronic device, and the lock structure 300 is used to implement locking and unlocking of the electronic device.
  • the processing module 400 can be connected to the main control module 500.
  • the processing module 400 can transmit the obtained comparison results to the main control module 500.
  • the main control module 500 can be connected to the lock structure 300.
  • the main control module 500 can implement comparison according to the comparison results. Recognize the user's identity and control the opening or closing of the lock structure 300. For example, when the comparison result is that the infrared image to be identified is the same as the preset infrared image, the main control module 500 controls the lock structure 300 to open to unlock the electronic device. When the comparison result is that the infrared image to be identified is different from the preset infrared image, the main control module 500 controls the lock structure 300 to close to achieve locking of the electronic device.
  • FIG. 2 is a schematic structural diagram of another electronic device provided by an embodiment of the present application.
  • the processing module 400 and the identification device 100 can be independently installed in the electronic device, and the processing module 400 can serve as the main control module of the electronic device to implement overall control of the electronic device.
  • the processing module 400 can be connected to the camera module of the identification device 100.
  • the camera module can form a finger vein image and transmit it to the processing module 400.
  • the function of the processing module 400 can be the same as the above-mentioned processing module.
  • the processing module 400 can obtain the preset infrared image of the finger vein. image and the infrared image to be identified, and compare the two to obtain the comparison result.
  • the processing module 400 can be connected to the identification device 100 and the lock structure 300 respectively. After the processing module 400 obtains the comparison result, it can realize the identification of the user's identity based on the comparison result.
  • the processing module 400 can also identify the lock structure 300.
  • the control is realized by opening or closing. For example, when the comparison result is that the infrared image to be identified is the same as the preset infrared image, the processing module 400 controls the lock structure 300 to open. When the comparison result is that the infrared image to be identified is different from the preset infrared image. , then the processing module 400 controls the lock structure 300 to close.
  • processing module 400 can be used as a main control module of an electronic device.
  • the processing module 400 can also be connected to other structures of the electronic device to control other functions. , for example, can be connected to the display screen of electronic equipment.
  • Figure 3 is a schematic structural diagram of an identification device in the related art.
  • the identification device 1 usually includes an infrared light source 101, an infrared filter 103 and a camera 102.
  • the infrared filter 103 is arranged parallel to the horizontal plane, and the infrared light source 101, the infrared filter 103 and the camera 102 They can be arranged sequentially in the thickness direction (the direction perpendicular to the horizontal plane).
  • the finger 200 can be inserted into the optical path of the infrared light source 101 and the camera 102. Specifically, the finger 200 can be inserted between the infrared light source 101 and the infrared filter 103.
  • the infrared light source 101 emits infrared light.
  • the infrared light will be scattered when it shines on the finger 200. Part of the infrared light will shine through the finger 200 to the camera 102.
  • the camera 102 receives the infrared light passing through the finger 200 and can form an infrared image of the finger.
  • veins absorb infrared light better than other tissues of fingers (such as muscles, dermis, etc.), and infrared light passes through Dark stripes will appear when passing through the veins, thus forming an image of a vein network on the infrared image, thus obtaining an infrared image of the finger veins.
  • Vein recognition utilizes the uniqueness of human finger vein network characteristics and the strong infrared absorption characteristics of hemoglobin in finger veins to achieve identity authentication. It has the characteristics of in vivo detection and in vivo detection, and is not easy to be copied and misappropriated, and has received extensive research and attention. As vein recognition technology is applied in more and more scenarios, the requirements for the volume and thickness of vein recognition devices are becoming higher and higher, and recognition devices are gradually developing in the direction of miniaturization and thinning.
  • a certain object distance is required for clear imaging, that is, a certain distance requirement needs to be met between the finger 200 and the camera 102, and the thickness (length in the thickness direction) of the identification device 1 will Restricted by the object distance, the thickness of the identification device 1 is relatively large, and the entire identification device 1 is large in size, which cannot meet the design requirements for miniaturization and thinning of the identification device 1 .
  • the identification device has a small thickness and volume, which is conducive to the miniaturization and thinning of the identification device. It can be applied to general scenarios such as door locks, attendance, identification and authentication in specific places, and can also be used in finance and other applications that require high confidentiality levels. Scenario identification and authentication, etc., or it can also be applied to any other scenario that requires identification.
  • Figure 4 is a schematic structural diagram of an identification device provided by an embodiment of the present application.
  • the direction parallel to the horizontal plane is the horizontal direction, such as the x direction in the figure, and the direction perpendicular to the horizontal plane is the thickness direction, such as the y direction in the figure.
  • the identification device 100 may include a light-emitting module 10 , a reflective module 20 and a camera module 30 .
  • the reflective module 20 may be located on the optical path between the light-emitting module 10 and the camera module 30 .
  • the light-emitting module 10 can emit infrared light.
  • the light-emitting module 10 can emit narrow-wave infrared light.
  • the infrared light emitted by the light-emitting module 10 can illuminate the finger 200 and be scattered on the finger 200. Part of the infrared light can pass through the finger 200, and part of the infrared light can be reflected by the finger 200.
  • the light-emitting module 10 and the reflective module 20 can be arranged in sequence along the thickness direction, and the camera module 30 can be located on the reflective module. 20 is on one side in the horizontal direction.
  • the finger 200 can be located between the light-emitting module 10 and the reflective module 20.
  • the infrared light passing through the finger 200 is an incident beam and can be irradiated onto the reflective module 20.
  • the reflective module 20 can reflect and refract the infrared light irradiated thereon, and change the optical path direction of the infrared light.
  • the infrared light emitted by the light-emitting module 10 passes through the finger 200 to form an incident beam.
  • the incident beam is illuminated on the reflective module 20.
  • the reflective module 20 reflects the incident beam and forms an imaging beam.
  • the imaging beam is illuminated on the camera module 30, and the camera module 30 receives the imaging beam. , an infrared image of the finger 200 can be formed, thereby obtaining an infrared image of the finger veins for identity authentication and recognition.
  • the reflection module 20 realizes the refraction of the optical path between the finger 200 and the camera module 30 , thereby reducing the length of the object distance in the thickness direction, thereby reducing the thickness of the identification device 100 .
  • the light-emitting module 10 and the reflective module 20 may be located on the same side of the finger 200.
  • the electronic device may also include a light-transmissive touch panel (not shown in the figure), and the touch panel is disposed on the housing.
  • the touchpad can be set parallel to the horizontal plane, and fingers can be placed on the touchpad during use.
  • the infrared light emitted by the light-emitting module 10 can be illuminated on the finger 200 through the touch panel, and the incident light beam formed by scattering by the finger 200 can also be illuminated on the reflective module 20 through the touch panel.
  • the light emitting module 10, the reflective module 20 and the camera module 30 can all be located below the touch panel.
  • the finger 200 is located on the touch panel.
  • the infrared light emitted by the light-emitting module 10 is scattered by the finger, and the part reflected by the finger forms an incident beam.
  • the incident beam is reflected by the reflection module 20 to form an imaging beam.
  • the camera module 30 receives the imaging beam and obtains an infrared image of the finger vein.
  • the light-emitting module 10 and the reflective module 20 can be located on opposite sides of the finger, the light-emitting module 10 can be located above the touch pad, and the reflective module 20 and the camera module 30 can be located below the touch pad, such as shown in Figure 3.
  • the light-emitting module 10 and the reflective module 20 are arranged along the thickness direction.
  • the finger 200 is located between the light-emitting module 10 and the reflective module 20 .
  • the infrared light passing through the finger 200 forms an incident beam.
  • the incident beam is reflected by the reflective module 20 and forms an imaging beam.
  • the camera module 30 receives the imaging beam and obtains an infrared image of the finger vein.
  • the light-emitting module 10 may also be located on one side of the touch panel in the horizontal direction.
  • the light-emitting module 10 and the reflective module 20 are arranged along the thickness direction, and the finger is located between the light-emitting module 10 and the reflective module 20 as an example.
  • the identification device 100 may also include an infrared filter 40 , which is located between the finger 200 and the reflective module 20 .
  • the infrared filter 40 40 can be located under the touch panel.
  • the infrared filter 40 can transmit infrared light and filter out ambient light in other light bands except infrared light in the environment.
  • the incident light beam passes through the infrared filter 40 and then illuminates the reflection module. 20. Helps improve imaging quality.
  • the light-emitting module 10 may be an infrared lamp, for example, an infrared LED light. Of course, in some other examples, the light-emitting module 10 may also be any other device capable of emitting infrared light.
  • the camera module 30 may be a camera. Of course, in some other examples, the camera module 30 may also be any other module or device capable of realizing the camera function.
  • the identification device 100 may also include a support structure member (not shown in the figure), and the light-emitting module 10, the reflection module 20, the camera module 30, the infrared filter 40, etc. may be disposed on the support structure member to achieve identification.
  • the integration of various structural components in the identification device 100 improves the reliability of the identification device 100 and facilitates assembly.
  • the reflective module 20 has a reflective surface 21 .
  • the infrared light emitted by the light-emitting module 10 passes through the finger 200 and forms an incident beam.
  • the incident beam irradiates onto the reflective surface 21 and is reflected by the reflective surface 21 .
  • An imaging beam is formed, and the imaging beam is irradiated to the camera module 30.
  • the camera module 30 receives the imaging beam and forms an infrared image of the finger vein.
  • the reflective surface 21 may be a flat surface, and the reflective surface 21 may be arranged inclined to a horizontal plane. Specifically, taking the inclination angle formed between the reflective surface 21 and the horizontal plane as the first included angle, such as the first included angle ⁇ shown in FIG. 4 , the value of the first included angle ⁇ can be made less than 45°.
  • the identification device 100 can have a smaller thickness and better imaging performance. At the same time, it meets the needs of high imaging quality and miniaturization and thinning design.
  • the reflective surface 21 of the reflective module 20 can achieve vertical refraction of the optical path, and the incident light beam irradiated on the reflective surface is in phase with the imaging light beam reflected by the reflective surface 21.
  • the optical axis of the camera module 30 can be parallel to the horizontal plane.
  • the optical axis of the camera module 30 may refer to the optical axis of the lens in the camera module, that is, a straight line passing through the center of the lens and perpendicular to the mirror surface of the lens.
  • the optical axis (see optical axis L in FIG. 4 ) of the camera module 30 can be set at an angle to the horizontal plane, so that the optical axis is aligned with the horizontal plane.
  • the inclination angle between them is the second included angle, such as the second included angle ⁇ in Figure 4.
  • the reflective module 20 may be a single reflective mirror. Of course, in some other examples, the reflective module 20 may also be other structural components having a reflective surface 21 capable of reflecting light beams.
  • FIG. 5 is a simulation schematic diagram of an identification device provided by an embodiment of the present application
  • FIG. 6 is a simulation schematic diagram of an identification device in a comparison group provided by an embodiment of the present application.
  • the structure and composition of the recognition device of the comparison group in Figure 6 are the same as the structure and composition of the recognition device in this embodiment, and the field of view is also the same.
  • the difference is that in the comparison group, the first included angle between the reflective surface 21 and the horizontal plane is 45°.
  • the first included angle between the reflective surface 21 and the horizontal plane is 41°.
  • the identification device when the same light-emitting module, camera module, etc. architecture is used and the same field of view is achieved, when the first included angle between the reflective surface 21 and the horizontal plane is 41°, The identification device has a smaller thickness. Specifically, compared with the first included angle of 45°, the thickness of the identification device is reduced by 14.3%.
  • FIG. 7 is a schematic structural diagram of another identification device provided by an embodiment of the present application.
  • FIG. 8 is a schematic structural diagram of a reflection module in another identification device provided by an embodiment of the present application.
  • the reflective surface 21 of the reflective module 20 is a convex surface.
  • the reflective module 20 has a convex reflective surface 21. Reflector.
  • the infrared light emitted by the light-emitting module 10 passes through the finger 200 to form an incident beam.
  • the incident beam irradiates the convex reflective surface 21 and is reflected by the reflective surface 21 to form an imaging beam.
  • the imaging beam is irradiated to the camera module. 30.
  • the camera module 30 receives the imaging beam and forms an infrared image of the finger vein.
  • the light beam is reflected by a convex surface to form a reduced image, so that the reflective surface 21 is a convex surface.
  • the size of the reflective surface 21 required by the reflective module 20 is relatively small, which can reduce the reflective module 20 thickness (dimension in the thickness direction), thereby reducing the thickness of the entire identification device 100, which is beneficial to miniaturization and thinning of the identification device 100.
  • the connecting straight line between the two ends of the reflective surface 21 can be arranged obliquely to the horizontal plane.
  • the angle ⁇ can be equal to 45°, and of course the tilt angle ⁇ can also be less than 45°.
  • the reflective surface 21 of the reflective module 20 is a convex surface
  • the incident light beam is reflected by the convex reflective surface 21 to form an imaging light beam
  • the camera module 30 receives the imaging light beam and forms an infrared image of the finger vein.
  • the introduction of the convex surface will have a certain distortion effect on the imaging of the camera module 30 .
  • the degree of distortion can be adjusted by adjusting the curvature of the reflective surface 21 to reduce or avoid the impact on imaging quality and ensure the accuracy of the identification device 100 .
  • the above distortion can also be compensated and adjusted in other ways.
  • the image algorithm of the camera module 30 can be adjusted to compensate for the impact of distortion on imaging, reducing or avoiding the impact on imaging quality.
  • the shape of the reflective surface 21 of the reflective module 20 may be a regular or irregular convex surface such as a sphere, a quadratic surface, or a free-form surface.
  • the thickness of the identification device 100 can be reduced, the distortion can be reduced, and the compensation for the distortion can be easily realized, which is beneficial to ensuring the imaging quality.
  • the radius of curvature of the spherical surface can be 10 mm to 200 mm, so that the identification device 100 has a smaller thickness and better imaging quality.
  • Figure 9 is a simulation diagram of another identification device provided by an embodiment of the present application.
  • a simulation comparison was conducted between the recognition device and the comparison group in the embodiment of the present application.
  • the comparison group can be found in Embodiment 1. Its structure is the same as that of the recognition device in the embodiment of the present application, and the size of the field of view is also the same. The difference is that in the comparison group, the reflective surface 21 is a flat surface (see Figure 6). In the identification device shown in the embodiment of the present application, the reflective surface 21 is a spherical surface, and its radius of curvature is 100 mm.
  • the identification device 100 when the same light-emitting module, camera module, etc. architecture is used and the same field of view is achieved, when the reflective surface 21 is a convex surface, the identification device 100 has a smaller thickness. Specifically, compared with when the reflective surface 21 is flat, the thickness of the identification device 100 is reduced by 10.6%.
  • Figure 10 is a schematic structural diagram of another identification device provided by an embodiment of the present application.
  • the reflective module 20 includes a light incident surface 22 , a reflective surface 21 and a light exit surface 23 , where both the light incident surface 22 and the light exit surface 23 can transmit infrared light.
  • the reflective module 20 may be a prism with at least three sides.
  • the reflection module 20 may be a triangular prism, the three surfaces of which form a light incident surface 22, a reflective surface 21 and a light exit surface 23 respectively.
  • the reflection module 20 can also be prisms of other shapes, such as trapezoids, polygonal prisms, etc., or the reflection module 20 can also be prisms of other irregular shapes.
  • the reflective module 20 is a prism, it has higher installation stability, which is beneficial to improving the reliability of the identification device 100 and is easy to assemble and implement.
  • the infrared light emitted by the light-emitting module 10 passes through the finger 200 to form an incident beam.
  • the incident beam enters the reflective module 20 through the light incident surface 22 and is transmitted to the reflective surface 21 .
  • the reflective surface 21 illuminates the incident beam.
  • the light beam is reflected to the light-emitting surface 23.
  • the light-emitting surface 23 transmits the incident light beam to form an imaging light beam and outputs it from the reflection module 20.
  • the imaging light beam is irradiated to the camera module 30.
  • the camera module 30 receives the imaging light beam and forms an infrared image of the finger vein.
  • At least one of the light incident surface 22, the reflective surface 21, and the light exit surface 23 can be a curved surface.
  • the light incident surface 22 when the light incident surface 22 is a curved surface, the light incident surface 22 can be formed by protruding toward the outside of the reflective module 20. convex surface.
  • the reflective surface 21 when the reflective surface 21 is a convex surface, the reflective surface 21 may be a convex surface formed toward the interior of the reflective module 20 .
  • the light-emitting surface 23 is a convex surface, the light-emitting surface 23 The light surface 23 may be a convex surface formed by protruding toward the outside of the reflective module 20 .
  • a triangular prism For example, take a triangular prism as an example.
  • two adjacent faces can be convex outwards.
  • Anti-reflection coatings can be coated on these two convex faces to respectively form the incident light.
  • the other surface can be convex inward, and a reflective film or the like can be coated on the inward convex surface to form the reflective surface 21 .
  • the incident beam enters the reflective module 20 through the light incident surface 22 and is transmitted to the reflective surface 21.
  • the reflective surface 21 reflects the incident beam to the light exit surface 23.
  • the light exit surface 23 allows the incident beam to pass through to form an imaging beam from the reflection module 20. output.
  • the imaging rules the light beam can form a reduced image when passing through a convex surface or being reflected by a convex surface. Therefore, making at least one of the light incident surface 22, the reflective surface 21, and the light exit surface 23 the above-mentioned convex surface can reduce the thickness of the reflective module 20. Thus, the thickness of the entire identification device 100 is reduced.
  • one of the light-incident surface 22, the reflective surface 21, and the light-emitting surface 23 can be a curved surface, and the others can be flat surfaces.
  • two of the above three can be curved surfaces and the rest can be flat surfaces.
  • all the above three can be curved surfaces.
  • the light incident surface 22 of the reflective module 20 can be a plane
  • the light exit surface 23 of the reflective module 20 can also be a plane
  • only the reflective surface 21 is facing the reflection.
  • the raised convex surface in the module 20 can be a plane
  • the infrared light emitted by the light-emitting module 10 passes through the finger 200 to form an incident beam.
  • the incident beam enters the reflective module 20 through the light incident surface 22 and is illuminated on the convex reflective surface 21.
  • the beam is reflected by the convex surface to form a reduced image.
  • the reflective surface 21 reflects the incident light beam to the light-emitting surface 23.
  • the incident light beam passes through the light-emitting surface 23 to form an imaging beam and is irradiated to the camera module 30.
  • the camera module 30 receives the imaging beam and forms an infrared image of the finger vein.
  • the required size of the reflective surface 21 is relatively small, and the required size of the light-emitting surface 23 can also be reduced, thereby reducing the thickness of the reflective module 20 and thus reducing the size of the entire identification device. 100 thickness.
  • the reflective module 20 with the small-sized reflective surface 21 and the light-emitting surface 23 can be formed through size control when the reflective module 20 is formed. Alternatively, the sizes of the reflective surface 21 and the light-emitting surface 23 can also be cut and adjusted after molding.
  • Figure 11 is a schematic structural diagram of yet another identification device provided by an embodiment of the present application.
  • a flat-angle structure may be formed on the end of the reflective module 20 opposite to the light incident surface 22 .
  • the two ends of the light incident surface 22 are respectively connected to the first end of the light exit surface 23 and the first end of the reflective surface 21 .
  • the two ends of the flat-angle structure intersect with the second end of the light-emitting surface 23 and the second end of the reflective surface 21 respectively, forming a trapezoidal structure as shown in FIG. 11 .
  • part of the reflective surface 21 and the light-emitting surface 23 can be removed by cutting, thereby forming a flat-angle structure on the reflective module 20 .
  • the size of the reflective surface 21 and the light-emitting surface 23 is reduced to reduce the thickness of the reflective module 20, thereby reducing the thickness of the identification device 100. It is easy to operate and implement, and has good flexibility.
  • the volume to be removed can be selected according to the actual demand of the imaging field of view, which is beneficial to further reducing the thickness of the identification device 100.
  • the reflective module 20 can also have a trapezoidal structure as shown in Figure 11.
  • the end of the reflective module 20 opposite to the light incident surface 22 has a flat-angle structure, and the reflective surface 21 and The light-emitting surfaces 23 all have smaller sizes.
  • Figure 12 is a schematic structural diagram of another identification device provided by an embodiment of the present application.
  • the reflective surface 21 of the reflective module 20 can be a flat surface, and only the light-incident surface 22 may be a convex surface protruding toward the outside of the reflective module 20 .
  • the infrared light emitted by the light-emitting module 10 passes through the finger 200 to form an incident light beam.
  • the incident light beam passes through the convex light incident surface 22 and irradiates onto the reflective surface 21.
  • the light beam passes through the convex surface to form a reduced image.
  • the reflective surface 21 reflects the incident light beam to the light-emitting surface 23.
  • the incident light beam passes through the light-emitting surface to form an imaging beam and is irradiated to the camera module 30.
  • the camera module 30 receives the imaging beam and forms an infrared image of the finger vein.
  • the light beam forms a reduced image after passing through the light incident surface 21, so the required sizes of the reflective surface 21 and the light exit surface 23 will be smaller, and the thickness of the reflective module 20 can also be reduced, thereby reducing the thickness of the entire identification device 100.
  • Figure 13 is a schematic structural diagram of yet another identification device provided by an embodiment of the present application.
  • a flat-angle structure can also be formed on the end of the reflective module 20 opposite to the light incident surface 22, thereby removing part of the reflective surface 21 and the light exit surface 23, and further reducing the size of the identification device while ensuring imaging performance. 100 thickness.
  • Figure 14 is a schematic structural diagram of another identification device provided by an embodiment of the present application.
  • the reflective surface 21 of the reflective module 20 can be a flat surface
  • the light-incident surface 22 can be a convex surface protruding toward the outside of the reflective module 20
  • the light-emitting surface 23 can also be A convex surface protruding toward the outside of the reflective module 20 .
  • the infrared light emitted by the light-emitting module 10 passes through the finger 200 to form an incident beam, and the incident beam passes through the convex light incident surface 22 to achieve a reduction in imaging and reduce the required thickness of the reflective surface 21 and the light exit surface 23 .
  • the reflective surface 21 reflects the incident beam to the light-emitting surface 23.
  • the incident beam passes through the outwardly convex light-emitting surface 23 to form an imaging beam, and is irradiated to the camera module 30.
  • the camera module 30 receives the imaging beam and forms an infrared image of the finger vein.
  • the light-emitting surface 23 can achieve a secondary reduction in imaging, further reduce the required thickness dimensions of the reflective surface 21 and the light-emitting surface 23 , further reduce the thickness of the reflective module 20 , and reduce the thickness of the identification device 100 .
  • the incident light beam passes through the two convex surfaces of the light incident surface 22 and the light exit surface 23 to achieve a secondary reduction in imaging, which will lengthen the focal length of the reflection module 20 and make the camera module 30 and the reflection module 20 longer.
  • the object distance of module 20 in the horizontal direction is relatively increased.
  • Figure 15 is a schematic structural diagram of yet another identification device provided by an embodiment of the present application.
  • a flat-angle structure can also be formed on the end of the reflective module 20 opposite to the light incident surface 22 , and part of the reflective surface 21 and the light exit surface 23 can be removed to further reduce the size of the identification device 100 while ensuring imaging performance. thickness of.
  • connection should be understood in a broad sense.
  • it can be a fixed connection or a fixed connection.
  • Indirect connection through an intermediary can be an internal connection between two elements or an interactive relationship between two elements.

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  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Vascular Medicine (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Multimedia (AREA)
  • Theoretical Computer Science (AREA)
  • Image Input (AREA)
  • Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
  • Studio Devices (AREA)

Abstract

La présente demande concerne un dispositif d'identification (100) et un dispositif électronique. Le dispositif d'identification (100) comprend un module électroluminescent (10), un module de réflexion (20) et un module de caméra (30). Le module électroluminescent (10) émet une lumière infrarouge qui est irradiée vers un doigt (200), et est diffusée par l'intermédiaire du doigt (200) pour former un faisceau lumineux incident. Le module de réflexion (20) réfléchit le faisceau de lumière incidente pour former un faisceau de lumière d'imagerie, et irradie le faisceau de lumière d'imagerie vers le module de caméra (30). Le module de caméra (30) reçoit le faisceau de lumière d'imagerie pour former une image infrarouge de veines de doigt pour une identification. La surface de réflexion (21) du module de réflexion (20) peut être un plan. Un premier angle inclus peut être formé entre la surface de réflexion (21) et le plan horizontal, le premier angle inclus étant inférieur à 45 degrés. La taille du dispositif d'identification (100) dans la direction de l'épaisseur est réduite, et le dispositif d'identification (100) est ainsi miniaturisé et aminci.
PCT/CN2023/100287 2022-06-28 2023-06-14 Dispositif d'identification et dispositif électronique WO2024001797A1 (fr)

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CN202210742856.0A CN117351527A (zh) 2022-06-28 2022-06-28 一种识别装置及电子设备

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20100008175A (ko) * 2008-07-15 2010-01-25 동국대학교 산학협력단 적외선 반사(가시광선 투과) 거울을 이용한 바이오 인식정보 취득 장치
CN104615976A (zh) * 2015-01-16 2015-05-13 深圳市维亿魄科技有限公司 移动终端系统及其移动终端、静脉识别装置
CN206421413U (zh) * 2017-01-20 2017-08-18 北京神州安盾科技有限公司 一种小型化指静脉身份认证装置
CN215344717U (zh) * 2021-02-10 2021-12-28 北京优彩科技有限公司 一种图像采集装置及成像装置
CN215499250U (zh) * 2021-08-09 2022-01-11 维沃移动通信有限公司 摄像头模组及电子设备

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20100008175A (ko) * 2008-07-15 2010-01-25 동국대학교 산학협력단 적외선 반사(가시광선 투과) 거울을 이용한 바이오 인식정보 취득 장치
CN104615976A (zh) * 2015-01-16 2015-05-13 深圳市维亿魄科技有限公司 移动终端系统及其移动终端、静脉识别装置
CN206421413U (zh) * 2017-01-20 2017-08-18 北京神州安盾科技有限公司 一种小型化指静脉身份认证装置
CN215344717U (zh) * 2021-02-10 2021-12-28 北京优彩科技有限公司 一种图像采集装置及成像装置
CN215499250U (zh) * 2021-08-09 2022-01-11 维沃移动通信有限公司 摄像头模组及电子设备

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