WO2021036703A1 - 一种指纹装置、电子设备及其制造方法 - Google Patents

一种指纹装置、电子设备及其制造方法 Download PDF

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Publication number
WO2021036703A1
WO2021036703A1 PCT/CN2020/106632 CN2020106632W WO2021036703A1 WO 2021036703 A1 WO2021036703 A1 WO 2021036703A1 CN 2020106632 W CN2020106632 W CN 2020106632W WO 2021036703 A1 WO2021036703 A1 WO 2021036703A1
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WO
WIPO (PCT)
Prior art keywords
middle frame
fingerprint
fingerprint device
collimator
microlens
Prior art date
Application number
PCT/CN2020/106632
Other languages
English (en)
French (fr)
Inventor
蔡奇
樊聪
林娇
彭旭
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP20858226.2A priority Critical patent/EP4020309A4/en
Publication of WO2021036703A1 publication Critical patent/WO2021036703A1/zh

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    • 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
    • G06V40/12—Fingerprints or palmprints
    • G06V40/13—Sensors therefor
    • G06V40/1324—Sensors therefor by using geometrical optics, e.g. using prisms
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/30—Collimators
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B3/0006—Arrays
    • G02B3/0037—Arrays characterized by the distribution or form of lenses
    • G02B3/0056—Arrays characterized by the distribution or form of lenses arranged along two different directions in a plane, e.g. honeycomb arrangement of lenses

Definitions

  • This application relates to the technical field of electronic equipment, and in particular to a fingerprint device, electronic equipment and a manufacturing method thereof.
  • the current implementation of the location of the fingerprint identification system generally includes the physical buttons on the front, the back and the bottom of the display screen.
  • full-screen display is an important development direction and technical selling point of electronic devices such as mobile phones in the future, and the corresponding under-screen fingerprint recognition technology can attract attention because it is more in line with users' habits.
  • common under-screen fingerprint recognition technologies include optical, capacitive, and ultrasonic fingerprint recognition technologies.
  • the location of the fingerprint device in the electronic device and the influence of the thickness and area of the fingerprint device itself on the architecture design need to be considered.
  • Existing fingerprint devices cannot receive fingerprint images from a long distance, so they often need to be installed on a screen. It is difficult to install the pasting screen, and there is a problem that the display screen is scrapped due to poor fit.
  • the embodiments of the present application provide a fingerprint device, an electronic device, and a manufacturing method thereof.
  • the installation position is flexible, and the problem of screen scrapping caused by the installation of the fingerprint device on the screen can be avoided.
  • an embodiment of the present application provides a fingerprint device, including a fingerprint image sensor and a collimator located on one side of the fingerprint image sensor, and a first side of the collimator far away from the fingerprint image sensor is provided.
  • Micro lens group the first micro lens group includes at least one first micro lens unit, the first micro lens unit is arranged corresponding to the collimator hole of the collimator, the first micro lens unit is used to The light from a side of the collimator away from the fingerprint image sensor converges into the collimating hole of the collimator.
  • the fingerprint device provided by the embodiment of the application includes a fingerprint image sensor for receiving fingerprint information, and a collimator on the side of the fingerprint image sensor, and a first microlens group is arranged on the side of the collimator away from the fingerprint image sensor
  • the first microlens group includes at least one first microlens unit, and the first microlens unit is arranged corresponding to the collimating hole of the collimator.
  • the first microlens unit can converge the light from the side of the collimator far away from the fingerprint image sensor into the collimator hole of the collimator, so that the fingerprint image light information is still available when the fingerprint device is far from the display screen.
  • the fingerprint device can only be installed on the screen. It can be installed in other positions without the screen.
  • the installation position is flexible and can avoid the problem of screen scrapping caused by the installation of the fingerprint device on the screen.
  • a second microlens group is further provided between the collimator and the fingerprint image sensor, and the second microlens group includes at least A second microlens unit, the second microlens unit is arranged corresponding to the collimation hole of the collimator, and the second microlens unit is used to converge the light passing through the collimation hole of the collimator to The fingerprint image sensor.
  • the first microlens group can converge some light rays that cannot be injected into the collimating hole or cannot be transmitted in a straight line, and enter the collimating hole, thereby improving the light transmittance.
  • a second microlens group can be arranged on the other side of the collimating hole, and the second microlens group can converge the light passing through the collimating hole To the fingerprint image sensor, improve the fingerprint recognition effect.
  • first microlens units there are multiple first microlens units, and the collimator has multiple The collimating holes are arranged in a one-to-one correspondence with the plurality of first microlens units and the plurality of collimating holes of the collimator.
  • the collimator has multiple collimating holes.
  • there can be multiple first microlens units there can be multiple first microlens units, and the multiple first microlens units correspond to the collimating holes one-to-one Set up.
  • a third optional implementation manner of the first aspect there are multiple second microlens units, and the collimator has multiple collimating holes,
  • the plurality of second microlens units are arranged in a one-to-one correspondence with the plurality of collimating holes of the collimator.
  • a plurality of second microlens units are also arranged under the plurality of collimating holes of the collimator in a one-to-one correspondence.
  • the first microlens unit is a convex lens.
  • the first microlens unit may be a convex lens with a function of condensing light, and the shape and structure of the specific convex lens can be flexibly adjusted according to actual light path requirements and assembly requirements. For example, the side of the convex lens facing the collimating hole is relatively flat, which is convenient for assembly.
  • the second microlens unit is a convex lens.
  • the second microlens unit may be a convex lens with a function of condensing light, and the shape and structure of the specific convex lens can be flexibly adjusted according to actual light path requirements and assembly requirements.
  • the side of the convex lens facing the collimating hole is relatively flat, which is convenient for assembly.
  • the sixth optional implementation of the first aspect it further includes a flexible for transmitting current and signals A circuit board, and the fingerprint image sensor is fixed on the flexible circuit board.
  • an embodiment of the present application provides an electronic device including a display screen, and the fingerprint device as described in any of the above technical solutions is arranged at intervals below the display screen.
  • the electronic equipment provided by the embodiments of the present application includes a display screen. Since the fingerprint device of any of the above technical solutions is arranged at intervals below the display screen, the fingerprint device is not attached to the display screen, which can avoid the installation of the fingerprint device on the screen. The problem of screen scrapping.
  • the gap between the display screen and the fingerprint device is greater than or equal to 0.1 mm.
  • a middle frame located below the display screen is included, and the fingerprint device is connected to the middle frame.
  • the frame is fixed.
  • the fingerprint device is bonded and fixed to the middle frame.
  • the lower surface of the middle frame is lower than the lower surface of the fingerprint device.
  • the fifth optional implementation of the second aspect it is characterized in that the upper surface of the middle frame is higher than the The upper surface of the fingerprint device.
  • the upper surface of the middle frame corresponds to the position of the fingerprint device A groove is opened downward, and the fingerprint device is fixed in the groove.
  • the middle frame includes a middle frame body and a middle frame support, and the groove is provided in the middle frame.
  • a mounting hole is provided on the middle frame body, and the middle frame support is arranged in the mounting hole.
  • the mounting hole is a stepped hole opened downwardly along the middle frame body, and the middle frame supports The outer contour of the lower surface of the part matches the stepped hole.
  • the battery assembly is provided under the middle frame, and the The area under the middle frame includes a battery area and a non-battery area, the battery assembly is disposed in the battery area, the fingerprint device is located above the battery area, or the fingerprint device is located above the non-battery area .
  • the bottom surface of the fingerprint device is attached to the bottom surface of the groove.
  • the fingerprint device has an avoidance gap between the side wall of the fingerprint device and the side wall of the groove.
  • the avoidance gap is greater than or equal to 0.3 mm.
  • the middle frame includes a middle frame body and a middle frame support, and the groove is provided in the On the middle frame support, an assembling groove is provided on the middle frame body, and the middle frame support is arranged in the assembling groove.
  • the middle frame may also include a middle frame body and a middle frame support member. The fingerprint device is fixed on the middle frame support member, and the fingerprint device is installed in the assembly slot through the middle frame support member, thereby fixing the fingerprint device in the middle frame. Box.
  • the matching method of the middle frame body and the middle frame support member can be the method of using the mounting holes in the above solution.
  • the mounting hole method is beneficial to reduce the thickness of the electronic device, while the slotted method has a higher structural strength of the frame body.
  • an embodiment of the present application provides a manufacturing method for manufacturing the electronic device described in any of the above technical solutions, including the following steps:
  • the display screen and the middle frame are fixed, and the display screen is located above the fingerprint device.
  • the manufacturing method provided by the embodiments of the present application is used to manufacture the electronic equipment described in any of the above technical solutions. Since the fingerprint device is fixed to the middle frame, the problem of screen scrapping caused by the installation of the fingerprint device on the screen can be avoided.
  • the electronic device includes a battery assembly disposed under the middle frame, and the area under the middle frame includes a battery area and a non-battery area Arranging the battery assembly in the battery area, and fixing the fingerprint device to the middle frame includes:
  • the fingerprint device is installed above the battery area or above the non-battery area.
  • the fingerprint device is fixed to the middle frame, and the middle frame includes a middle frame body And a middle frame support, said fixing the fingerprint device to the middle frame includes:
  • FIG. 1 is a schematic diagram of the stacking structure of an existing electronic device
  • FIG. 2 is a schematic diagram of the structure of the first fingerprint device in the prior art
  • FIG. 3 is a schematic diagram of the structure of the first fingerprint device installed in an electronic device in the prior art
  • FIG. 4 is a schematic structural diagram of a second fingerprint device in the prior art
  • FIG. 5 is a schematic structural diagram of a second type of fingerprint device in the prior art installed in an electronic device
  • FIG. 6 is a schematic structural diagram of a fingerprint device provided by an embodiment of the application.
  • FIG. 7 is a schematic structural diagram of a fingerprint device provided by an embodiment of the application when detecting fingerprint information
  • FIG. 8 is a schematic structural diagram of a collimator of a fingerprint device provided by an embodiment of the application.
  • FIG. 9 is a schematic structural diagram of the fingerprint device provided by an embodiment of the application without the first microlens unit disposed on the collimation hole;
  • FIG. 10 is a schematic structural diagram of a first microlens unit disposed on the collimation hole of the fingerprint device according to an embodiment of the application;
  • FIG. 11 is a schematic structural diagram of a fingerprint device provided with a second microlens unit according to an embodiment of the application.
  • FIG. 12 is a schematic structural diagram of a fingerprint device including a flexible circuit board according to an embodiment of the application.
  • FIG. 13 is a schematic diagram of a cross-sectional structure of an electronic device provided by an embodiment of the application.
  • FIG. 14 is an exploded view of the coordinated installation of the display screen, the fingerprint device, and the middle frame of the electronic device according to an embodiment of the application.
  • FIG. 1 it is a schematic diagram of a typical architecture stacking of existing electronic devices such as mobile phones, including a screen 01 and a fixed frame 02.
  • the space under the fixed frame 02 can be divided into a battery area 03 and a non-battery area 04 according to different components.
  • the battery area 03 is used to place the power source
  • the non-battery area 04 is used to place other optional electronic components such as circuit boards, sound chambers, motors, cameras, etc.
  • the fingerprint device is placed under the screen 01.
  • the fingerprint device can be fixed to the screen 01 or to the fixed frame 02; at the same time, the fingerprint device can be located above the battery area 03 or above the non-battery area 04 .
  • the above-mentioned positioning solution may not be implemented, or there may be some problems after implementation.
  • the fingerprint device is assembled with the screen 01, but there is a problem of higher cost due to poor fit, and the thickness of the fingerprint device is limited, which will affect the battery capacity or increase the thickness of the whole machine; when the thickness of the fingerprint device is large It can only be set above the non-battery area 04, but the area of the non-battery area 04 is limited and cannot meet the needs of fingerprints under the large-area screen.
  • the direction in which the fixed frame faces the screen along the thickness direction of the electronic device is upward, and the direction from the screen to the fixed frame is downward.
  • the fingerprint device may be located above the battery area 03. It is understandable that the fingerprint device is located above the battery area in the thickness direction of the electronic device, and the orthographic projection of the fingerprint device in the fixed frame is in the orthographic projection area of the battery area in the fixed frame; Correspondingly, the fingerprint device can be located above the non-battery area 04. It is understandable that the fingerprint device is located above the non-battery area in the thickness direction of the electronic device, and the orthographic projection of the fingerprint device in the fixed frame is on the battery area in the fixed frame. In the orthographic projection area.
  • the internal structure of the first fingerprint device 05 in the prior art is shown. It is installed under the screen 01 and includes an image sensor 051 and a collimation component 052. When a human finger presses the screen 01, the fingerprint information of the finger The light passes through the screen 01 and then is integrated by the collimating component 052, and is transmitted to the image sensor 051, which can identify fingerprint information.
  • FIG. 3 it is a schematic diagram of the structure of the fingerprint device 05 installed in the electronic device architecture of this solution.
  • the fingerprint device 05 of this solution since the fingerprint device 05 of this solution only has a collimating component 052 with a smaller size to cooperate with the image sensor 051, and its thickness is relatively thin, it can be installed in the battery area 03 or the non-battery area 04. However, the solution that fits the screen 01 will cause the problem of poor fit and the screen 01 is scrapped. Moreover, if the collimating component 052 of the fingerprint device 05 of this solution is far from the screen 01, the light passing rate is low, the optical imaging of the fingerprint is distorted, and the fingerprint cannot be recognized well, which will cause the fingerprint information to not be collected normally and affect normal operation.
  • the internal structure of the second fingerprint device 05 in the prior art is shown. It is installed under the screen 01 and includes an image sensor 051, and a lens structure 053 between the image sensor 051 and the screen 01, which acts as a human finger When the screen 01 is pressed, the fingerprint information light of the finger passes through the screen 01 and then passes through the focusing reverse imaging effect of the lens structure 053, and is transmitted to the image sensor 051.
  • the image sensor 051 can identify the fingerprint information.
  • FIG. 5 it is a schematic structural diagram of the fingerprint device 05 installed in the electronic device architecture of this solution.
  • the fingerprint device 05 of this solution is equipped with a lens structure 053 to cooperate with the image sensor 051, its optical path propagation requires a certain distance to ensure reverse imaging, that is, its thickness is relatively thick, so it can only be installed in the non-battery area 04.
  • An embodiment of the present application provides a fingerprint device 100, referring to FIG. 6, which is arranged under the display screen 200 of an electronic device, and includes a fingerprint image sensor 101, and also includes a collimator 102 arranged between the fingerprint image sensor 101 and the display screen 200
  • a first microlens group 103 is provided between the collimator 102 and the display screen 200.
  • the first microlens group 103 includes at least one first microlens unit 1031.
  • the first microlens unit 1031 corresponds to the collimation of the collimator 102
  • the hole 1021 is arranged above the collimator 102, and the first microlens unit 1031 is used to converge the fingerprint image light information above the display screen 200 into the collimator hole 1021 of the collimator 102.
  • the first microlens group 103 since the first microlens group 103 is provided on the side of the collimator 102 away from the fingerprint image sensor 101, the first microlens group 103 includes at least one first microlens The unit 1031 and the first microlens unit 1031 are arranged corresponding to the collimating hole 1021 of the collimator 102. In this way, when the fingerprint device 100 is far away from the display screen 200, the fingerprint image light information can be smoothly transmitted to the fingerprint image sensor 101, thereby liberating the limitation that the fingerprint device 100 can only be installed on the screen, and can be installed without the screen.
  • the installation location is flexible, and can avoid the problem of screen scrapping caused by the installation of the fingerprint device.
  • the structure of the micro lens due to the structure of the micro lens, its size is small, and its function is to integrate the light. It is different from the reflection imaging scheme of the larger-sized convex lens of the camera lens in the scheme shown in FIG. 4, and the entire fingerprint device 100 is The thickness is small, and it can adapt to the flexible installation of multiple positions in a small space.
  • the collimator can be made of silicon material or glass fiber or plastic.
  • the collimator is set on one surface of the fingerprint sensor and can be used for the angle between the barrier and the fingerprint sensor surface to exceed a certain threshold.
  • the incident light at a different angle ensures that the incident light perpendicular or approximately perpendicular to the surface of the fingerprint sensor is incident on the surface of the fingerprint sensor, which improves the utilization rate of light and reduces the interference of stray light.
  • the light information of the fingerprint is transmitted downward through the collimation hole 1021, and the collimator 102 is provided with a collimator.
  • the structure of the hole 1021 is shown in FIG. 8.
  • the light information of the fingerprint includes light a and light b in the figure, wherein the collimating hole 1021 to which the light a points is provided with a first microlens unit 1031, and the collimating hole 1021 to which the light b points is not
  • the first microlens unit 1031 is provided so that the transmission efficiency of light a is higher than that of light b.
  • the figure shows four rays of light e, f, g, and h, where the rays of light within the range of f and g in the figure can be Smoothly transmitted from one side of the collimating hole 1021 to the other side, while the light outside the range of f and g, such as e and h, cannot be correctly transmitted from one side of the collimating hole 1021 to the other side; compare with Figure 9 10, when the collimating hole 1021 is provided with the first microlens unit 1031 corresponding to the light rays (including f and g rays) in the range of e and h rays through the refraction and integration of the first microlens unit 1031, It is smoothly transferred from one side of the collimating hole 1021 to the other side.
  • the fingerprint device 100 provided with the first microlens unit 1031 significantly improves the light transmittance compared to the fingerprint device without the first microlens unit 1031. Therefore, the fingerprint device provided by the embodiment of the present application 100 can also normally identify fingerprint information at a position far away from the display screen 200, so that it can be installed without being attached to the display screen 200. The installation position is flexible, and the problem of screen scrapping caused by the installation of the fingerprint device on the screen can be avoided.
  • a second microlens group 104 can be arranged between the collimating hole 1021 and the fingerprint image sensor 101, as shown in FIG. 11, the second microlens group 104 can be arranged between the collimating hole 1021 and the fingerprint image sensor 101.
  • the microlens group 104 includes at least one second microlens unit 1041.
  • the second microlens unit 1041 is arranged corresponding to the collimation hole 1021 of the collimator 102, and the second microlens unit 1041 is used to pass through the collimation hole 1021 of the collimator 102.
  • the light of 1021 is concentrated on the fingerprint image sensor 101.
  • the first microlens group 103 can converge some light rays that cannot be injected into the collimating hole 1021 or cannot be transmitted in a straight line, and then enter the collimating hole 1021 to improve the light transmittance.
  • the second microlens group 104 can converge the light passing through the collimating hole 1021 onto the fingerprint image sensor 101 to improve the fingerprint recognition effect.
  • the collimator 102 has a plurality of collimating holes 1021, in order to improve the light transmittance of each collimating hole 1021, the first micro lens unit 1031 can be multiple, specifically, as shown in FIG. 6. As shown, there are multiple first microlens units 1031, and the multiple first microlens units 1031 are arranged in one-to-one correspondence with the multiple collimating holes 1021 of the collimator 102.
  • each collimation hole 1021 there may be multiple second microlens units 1041.
  • the first microlens unit 1031 may be a convex lens that has the function of condensing light, and the shape and structure of the specific convex lens can be flexibly adjusted according to actual light path requirements and assembly requirements. For example, as shown in FIG. 6, the side of the convex lens facing the collimating hole is relatively flat. , Easy to assemble and so on.
  • the second microlens unit 1041 is a convex lens.
  • the second microlens unit 1041 may be a convex lens with a function of condensing light, and the shape and structure of the specific convex lens can be flexibly adjusted according to actual light path requirements and assembly requirements. For example, as shown in FIG. 11, the side of the convex lens facing the collimating hole is relatively flat. , Easy to assemble and so on.
  • the convex lenses of the first microlens unit 1031 and the second microlens unit 1041 are provided corresponding to the collimating hole 1021 of the collimator 102, which is different from the conventional one shown in FIG. 4 Technical lens structure 053.
  • the size of the first microlens unit 1031 and the second microlens unit 1041 are smaller, and they are only used to integrate light, instead of focusing light on the lens structure 053 of FIG. 4 Therefore, it has little effect on the thickness of the entire fingerprint device 100.
  • the fingerprint device 100 in order to supply power and transmit signals to the fingerprint image sensor 101, it is necessary to connect corresponding structural lines, such as electrical wires and signal lines and printed circuit boards.
  • the fingerprint device 100 also includes For the flexible circuit board 105 that transmits current and signals, the fingerprint image sensor 101 is fixed on the flexible circuit board 105.
  • the flexible circuit board 105 can have a relatively large amount of deformation, which is convenient for assembly under the premise of ensuring power supply and signal transmission.
  • an embodiment of the present application also provides an electronic device, as shown in FIG. 13, including a display screen 200, and a fingerprint device 100 according to any one of the above technical solutions is arranged at intervals below the display screen 200.
  • the electronic device provided by the embodiment of the present application includes a display screen 200. Since the fingerprint device 100 of any one of the above technical solutions is spaced below the display screen 200, the fingerprint device 100 is not attached to the display screen 200. Together, it can avoid the problem of screen scrapping caused by the installation of the fingerprint device.
  • the fingerprint device 100 and the display screen 200 are usually arranged at intervals during assembly and installation. After experiments and calculations, the gap between the display screen 200 and the fingerprint device 100 can be greater than or equal to 0.1 mm.
  • the electronic device in the embodiment of the present application includes a display device located below the display screen 200.
  • the fingerprint device 100 can be fixed to the middle frame 300.
  • the fingerprint device 100 and the middle frame 300 are glued and fixed.
  • the display screen 200 is generally located on the upper side to facilitate user operation. Therefore, the upper and lower directions are determined. Yes, referring to FIGS. 13 and 14, along the thickness direction of the electronic device, the direction from the middle frame 300 to the display screen 200 is upward, and the direction from the display screen 200 to the middle frame 300 is downward.
  • the display screen 200 includes a light-emitting surface and a backlight surface.
  • the light-emitting surface can display images.
  • the backlight surface is opposite to the light-emitting surface, and the bottom of the display screen is the side close to the backlight surface.
  • the thickness of the fingerprint device 100 can be relatively thin, it can be set above the battery area or the non-battery area of the electronic device.
  • the bottom surface of the fingerprint device 100 is lower than that of the middle frame 300 The bottom surface may puncture the battery and cause serious consequences of burning the whole machine. Therefore, in order to prevent the fingerprint device 100 from puncturing the battery, referring to FIG. 13, optionally, the bottom surface of the middle frame 300 is lower than the bottom surface of the fingerprint device 100 .
  • the lower surface of the middle frame 300 may be coplanar with the lower surface of the fingerprint device 100.
  • the fingerprint device 100 and the display screen 200 are arranged at intervals.
  • the sides of the middle frame 300 or other intermediate structures For example, a plastic frame, etc.
  • a certain safety gap should also be ensured between the middle frame 300 and the display area of the display screen 200, and the gap can optionally be greater than or equal to 0.1 mm.
  • the size of the fingerprint device 100 is smaller than that of the middle frame 300, and it is installed on the middle frame 300, and then the middle frame 300 is assembled with the display screen 200.
  • the gap between the fingerprint device 100 and the display screen 200 is not easy to grasp. It is easier to implement the installation by using the distance between the middle frame 300 and the display screen 200 as a reference standard. On this basis, as shown in FIG. 13, as long as the upper surface of the middle frame 300 is higher than the upper surface of the fingerprint device 100, only the distance between the middle frame 300 and the display screen 200 can be ensured during installation. Both the fingerprint device 100 and the display screen 200 ensure a sufficient gap.
  • a groove 301 is opened downward on the upper surface of the middle frame 300 corresponding to the position of the fingerprint device 100, and the fingerprint device 100 is fixed in the groove 301.
  • the middle frame 300 Since the middle frame 300 needs to consider the assembly of a variety of electrical components, the design and layout of its structure need to consider many structures. In order to facilitate the manufacture of the middle frame 300, installation positions are often reserved in some positions, and then they are separately manufactured.
  • the middle frame 300 includes a middle frame body 302 and a middle frame support 303.
  • the groove 301 is provided on the middle frame support 303, and the middle frame body 302 is provided There is a mounting hole 304, and the middle frame support 303 is arranged in the mounting hole 304.
  • the mounting hole 304 is a stepped hole opened downwardly along the middle frame body 302, and the outer contour of the lower surface of the middle frame support 303 corresponds to the stepped hole. match.
  • the cooperation of the stepped holes can play a limiting role to prevent the middle frame support 303 from falling from the mounting hole 304.
  • the electronic device of the embodiment of the present application includes a battery assembly 400 arranged under the middle frame 300.
  • the area under the middle frame 300 includes a battery area 500 and a non-battery area 600.
  • the battery assembly 400 is arranged in the battery area. 500, the fingerprint device 100 is located above the battery area 500, or the fingerprint device 100 is located above the non-battery area 600, or the fingerprint device 100 is located above the battery area 500 and the non-battery area.
  • the fingerprint device is arranged above the battery area 500. It can be understood that the fingerprint device is located above the non-battery area in the thickness direction of the electronic device, and the orthographic projection of the fingerprint device in the middle frame 300 is on the battery area 500 in the middle frame 300. In the orthographic projection area.
  • the fingerprint device is arranged above the non-battery area 600. It can be understood that the fingerprint device is located above the non-battery area in the thickness direction of the electronic device, and the orthographic projection of the fingerprint device in the middle frame 300 is on the non-battery area 600. In the orthographic projection area of the middle frame 300.
  • the fingerprint device is arranged above the battery area 500 and the non-battery area 600.
  • the fingerprint device is located above the battery area 500 and the non-battery area 600 in the thickness direction of the electronic device, and the fingerprint device is in the middle frame.
  • the orthographic projection of 300 is in the battery area and the non-battery area is in the orthographic projection area of the middle frame 300.
  • the bottom surface of the fingerprint device 100 is fixed to the bottom surface of the groove 301.
  • the side wall of the fingerprint device 100 and the groove 301 There is an avoidance gap between the side walls.
  • the avoidance gap is greater than or equal to 0.3 mm.
  • the middle frame body 302 and the middle frame support 303 can be fitted with the mounting holes 304 as in the above solution.
  • the middle frame body 302 is slotted. The way. In the way of slotting on the middle frame body 302, the fingerprint device 100 is located in the slot, that is, the middle frame body 302 is not opened by the slot, the middle frame body 302 will have the structure of receiving the fingerprint device 100 in a specific way.
  • the frame 300 includes a middle frame body 302 and a middle frame support 303.
  • the groove 301 is arranged on the middle frame support 303, the middle frame body 302 is provided with an assembly groove, and the middle frame support 303 is arranged in the assembly groove.
  • a hole can be opened on the middle frame body 302, and the peripheral wall of the fingerprint device 100 and the side wall of the hole are attached and fixed.
  • the thickness of the middle frame body is the same as the thickness of the fingerprint device 100, the thickness of the electronic device can be reduced.
  • the middle frame body 302 is usually made of aluminum alloy material, and the middle frame support 303 can be made of any material such as aluminum alloy material, steel sheet, or FR4 resin material with up to standard strength. .
  • the embodiments of the present application also provide a manufacturing method for manufacturing the electronic device of any of the above technical solutions, which is characterized in that it includes the following steps:
  • the display screen 200 and the middle frame 300 are fixed, and the display screen 200 is located above the fingerprint device 100.
  • the manufacturing method provided by the embodiments of the present application is used to manufacture electronic equipment of any of the above technical solutions. Since the fingerprint device 100 is fixed to the middle frame 300, the problem of screen scrapping caused by the installation of the fingerprint device on the screen can be avoided.
  • the electronic device includes the battery assembly 400 arranged under the middle frame 300
  • the area under the middle frame 300 includes the battery area 500 and the non-battery area 600
  • the battery assembly 400 is arranged in the battery area 500
  • the fixing of the device 100 and the middle frame 300 includes:
  • the fingerprint device 100 is fixed to the middle frame 300.
  • the middle frame 300 includes the middle frame body 302 and the middle frame support 303. In this way, the fingerprint device 100 and the middle frame 300 can be fixed in different assembly sequences.
  • middle frame support 303 and the fingerprint device 100 into one body, and then fix the middle frame body 302 and the middle frame support 303;
  • the middle frame body 302 and the middle frame support 303 are assembled into one body, and then the fingerprint device 100 and the middle frame support 303 are fixed.
  • the middle frame support 303, and the fingerprint device 100 are assembled and fixed separately, the fingerprint device 100, the middle frame support 303, and the middle frame body 302 are independent of each other, and the three need to be assembled in sequence .
  • the material of the middle frame support 303 can be the same as that of the middle frame body 303.
  • stainless steel materials the specific shape can be processed by stamping or CNC (Computerized Numerical Control, computer digital control precision machining) according to process requirements.
  • the components of this scheme are independent and the processing is simple, but there are many process assembly steps.
  • the middle frame support 303 and the fingerprint device 100 are assembled into one body, and the middle frame body 302 and the middle frame support 303 are fixed, the fingerprint device 100 and the middle frame support 303 are combined as an integrated component.
  • the fingerprint device 100 and the middle frame support 303 are first assembled into an integrated component, move to the next process station, and then directly assembled with the matched middle frame body 302; the middle frame support 303 can be used as a fingerprint
  • the reinforcing steel sheet of the device 100 can be combined with the fingerprint device 100 to form an integrated component, and then the display screen 200 can be assembled.
  • This solution reduces the process assembly steps, and the middle frame support 303 improves the reliability of the module.
  • the middle frame body 302 and the middle frame support 303 are assembled into one body, and then the fingerprint device 100 is fixed to the middle frame support 303, the middle frame support 303 and the middle frame body 302 are combined as an integrated material.
  • the middle frame body 302 can be partially etched or stamped in the fingerprint bonding area for thinning, and then the fingerprint device 100 is directly bonded and assembled with the integrated middle frame 300, and finally the display screen 200 is assembled. This solution also reduces the process assembly steps, but the processing of the middle frame 300 is more difficult.

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Abstract

本申请实施例提供一种指纹装置、电子设备及其制造方法，涉及电子设备技术领域，安装位置灵活，能够避免指纹装置贴屏安装带来的屏幕报废的问题。该指纹装置包括指纹图像传感器和位于所述指纹图像传感器一侧的准直器，所述准直器远离所述指纹图像传感器的一侧设有第一微透镜组，所述第一微透镜组至少包括一个第一微透镜单元，所述第一微透镜单元对应所述准直器的准直孔设置，所述第一微透镜单元用于将所述显示屏上方的指纹图像光线信息汇聚至所述准直器的准直孔内。本申请实施例提供的指纹装置可用于指纹识别。

Description

一种指纹装置、电子设备及其制造方法
本申请要求2019年8月30日提交至国家知识产权局、申请号为201910816948.7、发明名称为“一种指纹装置、电子设备及其制造方法”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及电子设备技术领域，尤其涉及一种指纹装置、电子设备及其制造方法。
背景技术
随着科技的发展，电子设备已基本普及到人们的生活环境中的各个角落。为了更加便于电子设备为人们服务，电子设备与人之间的信息交互至关重要。以手机这种电子设备为例，其与人类的信息交互主要有：按压键盘、触摸屏幕、无线通信、语音输入、面部识别和指纹识别等。其中，指纹识别的唯一性和便捷性使其广泛应用到手机中的解锁和支付等操作中去。
以手机为例，现有的指纹识别系统的设置位置实现方式一般包括：正面物理按键处、背面和显示屏下方。现如今，全面屏显示是未来手机等电子设备的一个重要发展方向与技术卖点，与之对应的屏下指纹识别技术能够因为更符合用户的使用习惯而备受关注。目前常见的屏下指纹识别技术包括光学式、电容式、超声波式等指纹识别技术。为了增加手机等电子设备的竞争力，需要尽量减小指纹装置对手机等电子设备架构设计的影响，需要重点考虑指纹装置在电子设备的位置以及指纹装置自身的厚度和面积大小对架构设计的影响。现有的指纹装置不能接收较远距离的指纹图像，因此，常需要贴屏安装。贴屏安装比较困难且存在贴合不良导致显示屏报废的问题。
发明内容
本申请的实施例提供一种指纹装置、电子设备及其制造方法，安装位置灵活，能够避免指纹装置贴屏安装带来的屏幕报废的问题。
为达到上述目的，本申请的实施例采用如下技术方案：
第一方面，本申请实施例提供一种指纹装置，包括指纹图像传感器和位于所述指纹图像传感器一侧的准直器，所述准直器远离所述指纹图像传感器的一侧设有第一微透镜组，所述第一微透镜组至少包括一个第一微透镜单元，所述第一微透镜单元对应所述准直器的准直孔设置，所述第一微透镜单元用于将所述准直器远离所述指纹图像传感器的一侧光线汇聚至所述准直器的准直孔内。
本申请实施例提供的指纹装置，包括用于接收指纹信息的指纹图像传感器，以及在指纹图像传感器一侧的准直器，在准直器远离指纹图像传感器的一侧设置了第一微透镜组，第一微透镜组包括至少一个第一微透镜单元，第一微透镜单元对应准直器的准直孔设置。第一微透镜单元可以将准直器远离指纹图像传感器的一侧的光线汇聚至所述准直器的准直孔内，这样，在指纹装置距离显示屏较远的时候指纹图像光线信息还可以顺利传递至指纹图像传感器上，进而解放了指纹装置只能贴屏安装的限制，可以不贴屏安装在其他位置，安装位置灵活，且能够避免指纹装置贴屏安装带来的屏幕 报废的问题。
结合第一方面，在第一方面的第一种可选实现方式中，所述准直器和所述指纹图像传感器之间还设有第二微透镜组，所述第二微透镜组至少包括一个第二微透镜单元，所述第二微透镜单元对应所述准直器的准直孔设置，所述第二微透镜单元用于将经过所述准直器的准直孔的光线汇聚至所述指纹图像传感器上。第一微透镜组可以将一些本来不能射入准直孔内或者不能直线传递的光线汇聚，射入准直孔内，提高了光线的透过率。为了进一步提高由准直孔内射出的光线可以更好的传递和成像，可以在准直孔的另一侧再设置第二微透镜组，第二微透镜组可以将经过准直孔的光线汇聚至指纹图像传感器上，提高指纹识别效果。
结合第一方面和第一方面的第一种可选实现方式，在第一方面的第二种可选实现方式中，所述第一微透镜单元为多个，所述准直器具有多个准直孔，多个所述第一微透镜单元与所述准直器的多个准直孔一一对应设置。准直器上具有多个准直孔，为了可以提高每个准直孔的光线透过率，第一微透镜单元可以为多个，且多个第一微透镜单元与准直孔一一对应设置。
结合第一方面的第二种可选实现方式，在第一方面的第三种可选实现方式中，所述第二微透镜单元为多个，所述准直器具有多个准直孔，多个所述第二微透镜单元与所述准直器的多个准直孔一一对应设置。同样的，为了进一步使经过每个准直孔的光线可以汇聚至指纹图像传感器上，在准直器的多个准直孔下方也一一对应设置了多个第二微透镜单元。
结合第一方面和第一方面的第一种至第三种中的任一种可选实现方式，在第一方面的第四种可选实现方式中，所述第一微透镜单元为凸透镜。第一微透镜单元可以为具有汇聚光线作用的凸透镜，且具体凸透镜的外形结构可以根据实际的光路需求和装配需求灵活调整，例如，凸透镜朝向准直孔的一面较为平整，方便装配等。
结合第一方面的第一种或第三种可选实现方式，在第一方面的第五种可选实现方式中，所述第二微透镜单元为凸透镜。第二微透镜单元可以为具有汇聚光线作用的凸透镜，且具体凸透镜的外形结构可以根据实际的光路需求和装配需求灵活调整，例如，凸透镜朝向准直孔的一面较为平整，方便装配等。
结合第一方面和第一方面的第一种至第五种中的任一种可选实现方式，在第一方面的第六种可选实现方式中，还包括用于传输电流和信号的柔性电路板，所述指纹图像传感器固定在所述柔性电路板上。
第二方面，本申请实施例提供一种电子设备，包括显示屏，所述显示屏下方间隔设置有如上任一技术方案所述的指纹装置。
本申请实施例提供的电子设备，包括显示屏，由于在显示屏下方间隔设置了如上任一技术方案的指纹装置，因此，指纹装置不与显示屏贴合，可以避免指纹装置贴屏安装带来的屏幕报废的问题。
结合第二方面，在第二方面的第一种可选实现方式中，所述显示屏和所述指纹装置之间的间隙大于或等于0.1mm。
结合第二方面和第二方面的第一种可选实现方式，在第二方面的第二种可选实现方式中，包括位于所述显示屏下方的中框，所述指纹装置与所述中框固定。
结合第二方面的第二种可选实现方式，在第二方面的第三种可选实现方式中，所述指纹装置与所述中框贴合粘接固定。
结合第二方面的第二种或第三种可选实现方式，在第二方面的第四种可选实现方式中，所述中框的下表面低于所述指纹装置的下表面。
结合第二方面的第二种至第四种中的任一种可选实现方式，在第二方面的第五种可选实现方式中，其特征在于，所述中框的上表面高于所述指纹装置的上表面。
结合第二方面的第二种至第五种中的任一种可选实现方式，在第二方面的第六种可选实现方式中，所述中框的上表面对应所述指纹装置的位置向下开设有凹槽，所述指纹装置固定在所述凹槽内。
结合第二方面的第六种可选实现方式，在第二方面的第七种可选实现方式中，所述中框包括中框本体和中框支撑件，所述凹槽设置在所述中框支撑件上，所述中框本体上设有安装孔，所述中框支撑件设置在所述安装孔内。
结合第二方面的第七种可选实现方式，在第二方面的第八种可选实现方式中，所述安装孔为沿所述中框本体向下开设的阶梯孔，所述中框支撑件的下表面外轮廓与所述阶梯孔相匹配。
结合第二方面的第二种至第八种中的任一种可选实现方式，在第二方面的第九种可选实现方式中，包括设置在所述中框下方的电池组件，所述中框的下方的区域包括电池区域和非电池区域，所述电池组件设置在所述电池区域，所述指纹装置位于所述电池区域的上方，或所述指纹装置位于所述非电池区域的上方。
结合第二方面的第六种至第八种中的任一种可选实现方式，在第二方面的第十种可选实现方式中，所述指纹装置的底面与所述凹槽的底面贴合固定，所述指纹装置的侧壁与所述凹槽的侧壁之间具有避让间隙。
结合第二方面的第十种可选实现方式，在第二方面的第十一种可选实现方式中，所述避让间隙大于或等于0.3mm。
结合第二方面的第六种可选实现方式，在第二方面的第十二种可选实现方式中，所述中框包括中框本体和中框支撑件，所述凹槽设置在所述中框支撑件上，所述中框本体上设有装配槽，所述中框支撑件设置在所述装配槽内。为了方便指纹装置的安装，中框还可以包括中框本体和中框支撑件，将指纹装置固定在中框支撑件上，通过中框支撑件安装在装配槽内，进而将指纹装置固定在中框上。中框本体和中框支撑件的配合方式可以是上面方案的采用安装孔的方式，当然，在空间和结构需求时，可以是其他形式，例如，采用在中框本体上开槽的方式。相比较来说，安装孔的方式有利于减小电子设备厚度，而开槽的方式中框本体的结构强度较高。
第三方面，本申请实施例提供一种制造方法，用于制造如上任一技术方案所述的电子设备，包括以下步骤：
将所述指纹装置与所述中框固定；
将所述显示屏与所述中框固定，且所述显示屏位于所述指纹装置的上方。
本申请实施例提供的制造方法，用于制造如上任一技术方案所述的电子设备，由于将指纹装置与中框固定，因此，可以避免指纹装置贴屏安装带来的屏幕报废的问题。
结合第三方面，在第三方面的第一种可选实现方式中，所述电子设备包括设置在 所述中框下方的电池组件，所述中框的下方的区域包括电池区域和非电池区域，所述电池组件设置在所述电池区域，所述将所述指纹装置与所述中框固定包括：
将所述指纹装置安装在所述电池区域的上方或所述非电池区域的上方。
结合第三方面和第三方面的第一种可选实现方式，在第三方面的第二种可选实现方式中，所述指纹装置与所述中框固定，所述中框包括中框本体和中框支撑件，所述将所述指纹装置与所述中框固定包括：
将所述中框本体、所述中框支撑件和所述指纹装置分体依次组装固定；
或，将所述中框支撑件和所述指纹装置组装为一体，再将所述中框本体和所述中框支撑件固定；
或，将所述中框本体和所述中框支撑件组装为一体，再将所述指纹装置与所述中框支撑件固定。
附图说明
图1为现有的电子设备的架构堆叠示意图；
图2为现有技术的第一种指纹装置的结构示意图；
图3为现有技术的第一种指纹装置安装在电子设备内的结构示意图；
图4为现有技术的第二种指纹装置的结构示意图；
图5为现有技术的第二种指纹装置安装在电子设备内的结构示意图；
图6为本申请实施例提供的指纹装置的结构示意图；
图7为本申请实施例提供的指纹装置检测指纹信息时的结构示意图；
图8为本申请实施例提供的指纹装置的准直器的结构示意图；
图9为本申请实施例提供的指纹装置的准直孔上未设置第一微透镜单元的结构示意图；
图10为本申请实施例提供的指纹装置的准直孔上设置了第一微透镜单元的结构示意图；
图11为本申请实施例提供的指纹装置设置了第二微透镜单元的结构示意图；
图12为本申请实施例提供的指纹装置包括柔性电路板的结构示意图；
图13为本申请实施例提供的电子设备的截面结构示意图；
图14为本申请实施例提供的电子设备的显示屏、指纹装置和中框配合安装的爆炸图。
附图标记：
01-屏幕；02-固定框；03-电池区；04-非电池区；05-指纹装置；051-图像传感器；052-准直组件；053-透镜结构；100-指纹装置；101-指纹图像传感器；102-准直器；1021-准直孔；103-第一微透镜组；1031-第一微透镜单元；104-第二微透镜组；1041-第二微透镜单元；105-柔性电路板；200-显示屏；300-中框；301-凹槽；302-中框本体；303-中框支撑件；304-安装孔；400-电池组件；500-电池区域；600-非电池区域。
具体实施方式
为方便理解方案，现将电子设备内部关于指纹装置安装的相关结构堆叠简单介绍一下。参照图1，为现有的手机等电子设备典型的架构堆叠示意图，包括屏幕01和固定框02，在固定框02下方的空间根据设置部件的不同，可以分为电池区03和非电池 区04，电池区域03用于放置电源，而非电池区04用于放置电路板、音腔、马达、摄像头等其他可选的电子元件。从架构的基础上看，指纹装置放在屏幕01下方，指纹装置可以与屏幕01固定，也可以与固定框02固定；同时，指纹装置可以位于电池区03上方，也可以位于非电池区04上方。受结构或现有技术的限制影响，上述设置位置的方案中可能有不能实现的，也可能实现后存在一些问题。例如，当指纹装置与屏幕01贴合组装，但是由于贴合不良会存在成本较高的问题，同时指纹装置厚度受限，会影响电池容量或者导致整机厚度增加；当指纹装置的厚度较大时，只能设置在非电池区04上方，但是非电池区04的区域受限，无法满足大面积屏下指纹的需求。沿电子设备厚度方向固定框朝向屏幕的方向为上方，由屏幕朝向固定框的方向为下方。指纹装置可以位于电池区03上方，可以理解地，指纹装置在沿电子设备厚度方向上是位于电池区的上方，且指纹装置在固定框的正投影在电池区在固定框的正投影区域中；相应地，指纹装置可以位于非电池区04上方，可以理解地，指纹装置在沿电子设备厚度方向上是位于非电池区的上方，且指纹装置在固定框的正投影在电池区在固定框的正投影区域中。
示例的，现有技术中屏下指纹常有下面两种实现方式：
参照图2，示意了现有技术的第一种指纹装置05的内部结构，安装在屏幕01的下方，包括图像传感器051和准直组件052，当人的手指按压屏幕01时，手指的指纹信息光线穿过屏幕01再经过准直组件052整合，传递至图像传感器051上，图像传感器051可以识别指纹信息。再参照图3，为该方案的指纹装置05的安装在电子设备架构中的结构示意图。由于该方案的指纹装置05只设置了尺寸较小的准直组件052与图像传感器051配合，其厚度相对较薄，因此可以安装在电池区03或者非电池区04。但是，与屏幕01贴合的方案又会带来贴合不良导致屏幕01报废的问题。且该方案的指纹装置05的准直组件052如果离屏幕01较远，光线通过率较低，指纹光学成像失真，不能很好的进行识别，会导致指纹信息不能正常采集，影响正常工作。
参照图4，示意了现有技术的第二种指纹装置05的内部结构，安装在屏幕01下方，包括图像传感器051，以及位于图像传感器051和屏幕01之间的透镜结构053，当人的手指按压屏幕01时，手指的指纹信息光线穿过屏幕01再经过透镜结构053的聚焦反向成像作用，传递至图像传感器051上，图像传感器051可以识别指纹信息。再参照图5，为该方案的指纹装置05的安装在电子设备架构中的结构示意图。由于该方案的指纹装置05设置了透镜结构053与图像传感器051配合，其光路传播需要一定的距离才能保证反向成像，即其厚度相对较厚，因此只能安装在非电池区域04内。
本申请实施例提供一种指纹装置100，参照图6，设置在电子设备的显示屏200下方，包括指纹图像传感器101，还包括设置在指纹图像传感器101和显示屏200之间的准直器102，准直器102与显示屏200之间设有第一微透镜组103，第一微透镜103组至少包括一个第一微透镜单元1031，第一微透镜单元1031对应准直器102的准直孔1021且设置在准直器102的上方，第一微透镜单元1031用于将显示屏200上方的指纹图像光线信息汇聚至准直器102的准直孔1021内。
本申请实施例提供的指纹装置100，参照图6，由于在准直器102远离指纹图像传感器101的一侧设置了第一微透镜组103，第一微透镜组103包括至少一个第一微透 镜单元1031，第一微透镜单元1031对应准直器102的准直孔1021设置。这样，在指纹装置100距离显示屏200较远的时候指纹图像光线信息还可以顺利传递至指纹图像传感器101上，进而解放了指纹装置100只能贴屏安装的限制，可以不贴屏安装，而是安装在其他位置，安装位置灵活，且能够避免指纹装置贴屏安装带来的屏幕报废的问题。同时，由于采用的是微透镜的结构，其尺寸较小，作用是将光线整合，而不同于图4所示方案中的摄像镜头的较大尺寸的凸透镜的倒影成像方案，整个指纹装置100的厚度较小，可以适应小空间内多位置的灵活选择安装。
需要说明的是，准直器(collimator)，可用硅材料或玻璃光纤或塑料等材料制成，准直器设置在指纹传感器一侧表面上，可用于隔档与指纹传感器表面夹角超过一定阈值的角度的入射光线，保证垂直或近似垂直于指纹传感器表面的入射光线入射到指纹传感器表面，提升光线利用率，减少杂散光线的干扰。
为了清楚说明本申请实施例提供的指纹装置100的效果，参照图7，手指按压在显示屏200上时，指纹的光线信息经过准直孔1021向下传递，准直器102上设置的准直孔1021的结构如图8所示。示例的，再参照图7，指纹的光线信息包括图中的光线a和光线b，其中，光线a指向的准直孔1021设有第一微透镜单元1031，光线b指向的准直孔1021未设置第一微透镜单元1031，这样，光线a比光线b的传递效率高。具体的，参照图9，当准直孔1021上方未设置第一微透镜单元1031时，图中示出了e、f、g、h四条光线，其中，图中f、g范围内的光线可以顺利从准直孔1021的一侧传递至另一侧，而f、g范围以外的光线，例如e和h光线就不能正确从准直孔1021的一侧传递至另一侧；与图9对比的，参照图10，当准直孔1021的对应设有第一微透镜单元1031时，e、h光线范围内的光线(包括f、g光线)经过第一微透镜单元1031的折射整合，可以顺利从准直孔1021的一侧传递至另一侧。可以明显看出，设置有第一微透镜单元1031的指纹装置100相比未设置第一微透镜单元1031的指纹装置，明显提高了光线的透过率，因此，本申请实施例提供的指纹装置100在距离显示屏200较远的位置还可以正常识别指纹信息，进而可以不用与显示屏200贴合安装，安装位置灵活，能够避免指纹装置贴屏安装带来的屏幕报废的问题。
为了进一步提高由准直孔1021内射出的光线可以更好的传递和成像，可以在准直孔1021和指纹图像传感器101之间再设置第二微透镜组104，如图11所示，第二微透镜组104至少包括一个第二微透镜单元1041，第二微透镜单元1041对应准直器102的准直孔1021设置，第二微透镜单元1041用于将经过准直器102的准直孔1021的光线汇聚至指纹图像传感器101上。第一微透镜组103可以将一些本来不能射入准直孔1021内或者不能直线传递的光线汇聚，射入准直孔1021，提高了光线的透过率。第二微透镜组104可以将经过准直孔1021的光线汇聚至指纹图像传感器101上，提高指纹识别效果。
参照图8，准直器102上具有多个准直孔1021，为了可以提高每个准直孔1021的光线透过率，第一微透镜单元1031可以为多个，具体的，如图6所示，第一微透镜单元1031为多个，且多个第一微透镜单元1031与准直器102的多个准直孔1021一一对应设置。
同样的，为了进一步使经过每个准直孔1021的指纹图像光线信息可以汇聚至指纹 图像传感器上，第二微透镜单元1041可以为多个。如图11所示，第二微透镜单元1041为多个，且多个第二微透镜单元1041与准直器102的多个准直孔1021一一对应设置。
第一微透镜单元1031可以为具有汇聚光线作用的凸透镜，且具体凸透镜的外形结构可以根据实际的光路需求和装配需求灵活调整，例如，如图6所示，凸透镜朝向准直孔的一面较为平整，方便装配等。
同样，第二微透镜单元1041为凸透镜。第二微透镜单元1041可以为具有汇聚光线作用的凸透镜，且具体凸透镜的外形结构可以根据实际的光路需求和装配需求灵活调整，例如，如图11所示，凸透镜朝向准直孔的一面较为平整，方便装配等。
需要说明的是，参照图12，此处的第一微透镜单元1031和第二微透镜单元1041的凸透镜，对应准直器102的准直孔1021设置的，其不同于图4所示现有技术的透镜结构053，相比较来说，第一微透镜单元1031和第二微透镜单元1041的尺寸较小，且仅是为了整合光线，而不用像图4的透镜结构053通过聚焦光线进行反向成像，因此，对整个指纹装置100的厚度影响很小。
一般的，为了给指纹图像传感器101供电以及传输信号，需要对应的接通结构线路，比如，电线信号线和印刷电路板等，为了方便安装装配，如图12所示，指纹装置100还包括用于传输电流和信号的柔性电路板105，指纹图像传感器101固定在柔性电路板105上。柔性电路板105可以有较大的形变量，在保证供电和信号传输的前提下，方便装配。
第二方面，本申请实施例还提供一种电子设备，如图13所示，包括显示屏200，显示屏200下方间隔设置有如上任一技术方案的指纹装置100。
本申请实施例提供的电子设备，如图13所示，包括显示屏200，由于在显示屏200下方间隔设置了如上任一技术方案的指纹装置100，因此，指纹装置100不与显示屏200贴合，可以避免指纹装置贴屏安装带来的屏幕报废的问题。
为了防止指纹装置100与显示屏200接触而损伤显示屏200，因此，通常在装配安装时，指纹装置100与显示屏200间隔设置。经过试验和计算，显示屏200和指纹装置100之间的间隙可大于或等于0.1mm。
一般的，电子设备的显示屏200以及其它多个部件的固定需要一个对应的安装支撑结构，例如中框等，因此，如图13所示，本申请实施例的电子设备包括位于显示屏200下方的中框300，指纹装置100可以与中框300固定。
为了方便指纹装置100与中框300固定，指纹装置100与中框300贴合粘接固定。
需要说明的是，本申请实施例的电子设备中，为方便描述，基于电子设备使用时的习惯，显示屏200一般位于上方，以方便用户操作，因此，确定了上方和下方两个方向，具体的，可以参照图13和图14，沿电子设备厚度方向，由中框300朝向显示屏200的的方向为上方，由显示屏200朝向中框300的方向为下方。可以理解的，显示屏200包括出光面和背光面，出光面可以显示出图像，背光面与出光面相对，显示屏的下方是靠近背光面的一侧。
由于指纹装置100的厚度可以比较薄，可以设置在电子设备的电池区上方或者非电池区上方，当指纹装置100位于电子设备的电池上方时，如果指纹装置100的下表面低于中框300的下表面，可能会刺伤电池，造成烧毁整机的严重后果，因此，为了 防止指纹装置100刺伤电池，参照图13，可选的，中框300的下表面低于指纹装置100的下表面。当然，在可以保证工艺误差的情况下，中框300的下表面可以与指纹装置100的下表面共平面。
指纹装置100与显示屏200间隔设置，同时，在装配显示屏200和中框300时，为防止中框300挤压显示屏200的显示区域，常会采用中框300的侧边或者其他中间结构(例如胶框等)与显示屏200的侧边连接，以固定显示屏200。使得中框300与显示屏200的显示区域之间也要保证一定的安全间隙，该间隙可选的也大于或等于0.1mm。指纹装置100相对于中框300尺寸较小，且其安装在中框300上，然后中框300再与显示屏200进行装配，这样，指纹装置100与显示屏200之间的间隙不易把握，因此，在安装时以中框300与显示屏200之间的距离为参考标准比较容易实现。在此基础上，如图13所示，只要保证中框300的上表面高于指纹装置100的上表面，在安装时仅考虑中框300与显示屏200之间的距离即可保证中框300和指纹装置100均与显示屏200保证足够的间隙。
如图13所示，为了减小整个电子设备的厚度，中框300的上表面对应指纹装置100的位置向下开设有凹槽301，指纹装置100固定在凹槽301内。
由于中框300需要考虑多种电气元件的装配，其结构的设计和布局需要考虑的结构较多，为了方便中框300的制造，常在一些位置预留出安装位置，然后再分体制造适配的安装部件来安装电气元件，例如，如图13所示，中框300包括中框本体302和中框支撑件303，凹槽301设置在中框支撑件303上，中框本体302上设有安装孔304，中框支撑件303设置在安装孔304内。
为了防止中框支撑件303从安装孔304内下落，如图13所示，安装孔304为沿中框本体302向下开设的阶梯孔，中框支撑件303的下表面外轮廓与阶梯孔相匹配。阶梯孔的配合可以起到一个限位作用，阻止中框支撑件303从安装孔304内下落。
本申请实施例的电子设备，如图13所示，包括设置在中框300下方的电池组件400，中框300的下方的区域包括电池区域500和非电池区域600，电池组件400设置在电池区域500，指纹装置100位于电池区域500的上方，或指纹装置100位于非电池区域600的上方，或者指纹装置100位于电池区域500和非电池区域的上方。
指纹装置设置在电池区域500的上方，可以理解为，指纹装置在沿电子设备厚度方向上是位于非电池区的上方，且指纹装置在中框300的正投影在电池区域500在中框300的正投影区域中。相应地，指纹装置设置在非电池区域600的上方，可以理解为，指纹装置在沿电子设备厚度方向上是位于非电池区的上方，且指纹装置在中框300的正投影在非电池区域600在中框300的正投影区域中。相应地，指纹装置设置在电池区域500和非电池区域600的上方，可以理解为，指纹装置在沿电子设备厚度方向上是位于电池区域500和非电池区域600的上方，且指纹装置在中框300的正投影在电池区域和非电池区域在中框300的正投影区域中。
如图13所示，指纹装置100的底面与凹槽301的底面贴合固定，为了避免在安装过程中凹槽301的侧壁碰伤指纹装置100，指纹装置100的侧壁与凹槽301的侧壁之间具有避让间隙。
可选地，避让间隙大于或等于0.3mm。
中框本体302和中框支撑件303的配合方式可以是上面方案的采用安装孔304的方式，当然，在空间和结构需求时，可以是其他形式，例如，采用在中框本体302上开槽的方式。在中框本体302上开槽的方式中，指纹装置100位于槽内，即中框本体302未被该槽打通，中框本体302会有承接指纹装置100的结构开槽的方式具体的，中框300包括中框本体302和中框支撑件303，凹槽301设置在中框支撑件303上，中框本体302上设有装配槽，中框支撑件303设置在装配槽内。可选地，还可以在中框本体302上开孔，指纹装置100的周壁和孔的侧壁贴合固定，当中框本体的厚度和指纹装置100的厚度一致时，可以减少电子设备的厚度。
需要说的是，中框本体302常见的是由铝合金材料制成，中框支撑件303可以是由铝合金材料、钢片、或者强度达标的FR4树脂材料等中的任一种材料制成。
第三方面，本申请实施例还提供一种制造方法，用于制造如上任一技术方案的电子设备，其特征在于，包括以下步骤：
将指纹装置100与中框300固定；
将显示屏200与中框300固定，且显示屏200位于指纹装置100的上方。
本申请实施例提供的制造方法，用于制造如上任一技术方案的电子设备，由于将指纹装置100与中框300固定，因此，可以避免指纹装置贴屏安装带来的屏幕报废的问题。
参照图13和图14，当电子设备包括设置在中框300下方的电池组件400，中框300的下方的区域包括电池区域500和非电池区域600，电池组件400设置在电池区域500，将指纹装置100与中框300固定包括：
将指纹装置100安装在电池区域500的上方，
或将指纹装置100安装在非电池区域600的上方，
或将指纹装置100安装在电池区域500和非电池区域600的上方。
参照图13和图14，指纹装置100与中框300固定，中框300包括中框本体302和中框支撑件303，这样，将指纹装置100与中框300固定可以有不同的装配顺序。
包括：
将中框本体302、中框支撑件303和指纹装置100分体依次组装固定；
或，将中框支撑件303和指纹装置100组装为一体，再将中框本体302和中框支撑件303固定；
或，将中框本体302和中框支撑件303组装为一体，再将指纹装置100与中框支撑件303固定。
在中框本体302、中框支撑件303和指纹装置100分体依次组装固定的方案中，指纹装置100、中框支撑件303以及中框本体302三者各自独立，需要依次将三者组装起来。其中中框支撑件303的材料可以选择与中框本体303相同的。例如不锈钢材料，具体的外形可以根据工艺要求可以采用冲压或者CNC(Computerized Numerical Control，计算机数字化控制精密机械加工)加工而成。此方案的组件独立，加工简单，但工艺组装步骤较多。
在中框支撑件303和指纹装置100组装为一体，再将中框本体302和中框支撑件303固定的方案中，指纹装置100与中框支撑件303二合一作为一体化组件，这样， 在制作工艺流程中，指纹装置100与中框支撑件303先组装成一体化组件，走向下一个流程工位，然后直接与配对的中框本体302进行组装；其中中框支撑件303可以作为指纹装置100的补强钢片，可以与指纹装置100压合成形一体化组件，然后再进行显示屏200的组装。此方案减少了工艺组装步骤，中框支撑件303提升了模组的可靠性。
在中框本体302和中框支撑件303组装为一体，再将指纹装置100与中框支撑件303固定的方案中，中框支撑件303和中框本体302二合一作为一体化来料，中框本体302可以在指纹贴合区域进行局部蚀刻或冲压进行减薄，然后指纹装置100直接与一体化的中框300进行贴合组装，最后再进行显示屏200的组装。此方案同样减小工艺组装步骤，但中框300的加工难度较大。
在本说明书的描述中，具体特征、结构、材料或者特点可以在任何的一个或多个实施例或示例中以合适的方式结合。
最后应说明的是：以上实施例仅用以说明本申请的技术方案，而非对其限制；尽管参照前述实施例对本申请进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本申请各实施例技术方案的范围。

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  1. 一种指纹装置，其特征在于，包括指纹图像传感器和位于所述指纹图像传感器一侧的准直器，所述准直器远离所述指纹图像传感器的一侧设有第一微透镜组，所述第一微透镜组至少包括一个第一微透镜单元，所述第一微透镜单元对应所述准直器的准直孔设置，所述第一微透镜单元用于将所述准直器远离所述指纹图像传感器的一侧光线汇聚至所述准直器的准直孔内。
  2. 根据权利要求1所述的指纹装置，其特征在于，所述准直器和所述指纹图像传感器之间还设有第二微透镜组，所述第二微透镜组至少包括一个第二微透镜单元，所述第二微透镜单元对应所述准直器的准直孔设置，所述第二微透镜单元用于将经过所述准直器的准直孔的光线汇聚至所述指纹图像传感器上。
  3. 根据权利要求1或2所述的指纹装置，其特征在于，所述第一微透镜单元为多个，所述准直器具有多个准直孔，多个所述第一微透镜单元与所述准直器的多个准直孔一一对应设置。
  4. 根据权利要求2所述的指纹装置，其特征在于，所述第二微透镜单元为多个，所述准直器具有多个准直孔，多个所述第二微透镜单元与所述准直器的多个准直孔一一对应设置。
  5. 根据权利要求1～4中任一项所述的指纹装置，其特征在于，所述第一微透镜单元为凸透镜。
  6. 根据权利要求2或4所述的指纹装置，其特征在于，所述第二微透镜单元为凸透镜。
  7. 根据权利要求1～6中任一项所述的指纹装置，其特征在于，还包括用于传输电流和信号的柔性电路板，所述指纹图像传感器固定在所述柔性电路板上。
  8. 一种电子设备，包括显示屏，其特征在于，所述显示屏下方间隔设置有权利要求1～7中任一项所述的指纹装置。
  9. 根据权利要求8所述的电子设备，其特征在于，所述显示屏和所述指纹装置之间的间隙大于或等于0.1mm。
  10. 根据权利要求8或9所述的电子设备，其特征在于，包括位于所述显示屏下方的中框，所述指纹装置与所述中框固定。
  11. 根据权利要求10所述的电子设备，其特征在于，所述指纹装置与所述中框贴合粘接固定。
  12. 根据权利要求10或11所述的电子设备，其特征在于，所述中框的下表面低于所述指纹装置的下表面。
  13. 根据权利要求10～12中任一项所述的电子设备，其特征在于，所述中框的上表面高于所述指纹装置的上表面。
  14. 根据权利要求10～13中任一项所述的电子设备，其特征在于，所述中框的上表面对应所述指纹装置的位置向下开设有凹槽，所述指纹装置固定在所述凹槽内。
  15. 根据权利要求14所述的电子设备，其特征在于，所述中框包括中框本体和中框支撑件，所述凹槽设置在所述中框支撑件上，所述中框本体上设有安装孔，所述中框支撑件设置在所述安装孔内。
  16. 根据权利要求15所述的电子设备，其特征在于，所述安装孔为沿所述中框本体向下开设的阶梯孔，所述中框支撑件的下表面外轮廓与所述阶梯孔相匹配。
  17. 根据权利要求10～15中任一项所述的电子设备，其特征在于，包括设置在所述中框下方的电池组件，所述中框的下方的区域包括电池区域和非电池区域，所述电池组件设置在所述电池区域，所述指纹装置位于所述电池区域的上方，或所述指纹装置位于所述非电池区域的上方，或所述指纹装置位于所述电池区域和所述非电池区域的上方。
  18. 一种制造方法，其特征在于，用于制造权利要求10～17中任一项所述的电子设备，包括以下步骤：
    将所述指纹装置与所述中框固定；
    将所述显示屏与所述中框固定，且所述显示屏位于所述指纹装置的上方。
  19. 根据权利要求18所述的制造方法，其特征在于，所述电子设备包括设置在所述中框下方的电池组件，所述中框的下方的区域包括电池区域和非电池区域，所述电池组件设置在所述电池区域，所述将所述指纹装置与所述中框固定包括：
    将所述指纹装置安装在所述电池区域的上方，
    或将所述指纹装置安装在所述非电池区域的上方，
    或将所述指纹装置安装在所述电池区域和所述非电池区域的上方。
  20. 根据权利要求18或19所述的制造方法，其特征在于，所述指纹装置与所述中框固定，所述中框包括中框本体和中框支撑件，所述将所述指纹装置与所述中框固定包括：
    将所述中框本体、所述中框支撑件和所述指纹装置分体依次组装固定；
    或，将所述中框支撑件和所述指纹装置组装为一体，再将所述中框本体和所述中框支撑件固定；
    或，将所述中框本体和所述中框支撑件组装为一体，再将所述指纹装置与所述中框支撑件固定。
PCT/CN2020/106632 2019-08-30 2020-08-03 一种指纹装置、电子设备及其制造方法 WO2021036703A1 (zh)

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