WO2020056728A1 - 光学图像采集单元、光学图像采集系统和电子设备 - Google Patents

光学图像采集单元、光学图像采集系统和电子设备 Download PDF

Info

Publication number
WO2020056728A1
WO2020056728A1 PCT/CN2018/106965 CN2018106965W WO2020056728A1 WO 2020056728 A1 WO2020056728 A1 WO 2020056728A1 CN 2018106965 W CN2018106965 W CN 2018106965W WO 2020056728 A1 WO2020056728 A1 WO 2020056728A1
Authority
WO
WIPO (PCT)
Prior art keywords
optical image
image acquisition
light
acquisition unit
optical
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/CN2018/106965
Other languages
English (en)
French (fr)
Inventor
龙卫
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen Goodix Technology Co Ltd
Original Assignee
Shenzhen Goodix Technology Co Ltd
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 Shenzhen Goodix Technology Co Ltd filed Critical Shenzhen Goodix Technology Co Ltd
Priority to PCT/CN2018/106965 priority Critical patent/WO2020056728A1/zh
Priority to CN201880001565.8A priority patent/CN109416736A/zh
Publication of WO2020056728A1 publication Critical patent/WO2020056728A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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

Definitions

  • the embodiments of the present application relate to the field of information technology, and more particularly, to an optical image acquisition unit, an optical image acquisition system, and an electronic device.
  • biometric recognition technology such as fingerprint recognition technology
  • biometric recognition technology optical image acquisition is one of the more important implementations.
  • the requirements for biometric recognition are getting higher and higher. For example, larger recognition areas and smaller assembly spaces are required. Accordingly, the requirements for optical image acquisition products are also getting higher and higher.
  • the embodiments of the present application provide an optical image acquisition unit, an optical image acquisition system, and an electronic device, which can improve the performance of an optical image acquisition product.
  • an optical image acquisition unit including: a micro lens; a first light blocking layer disposed below the micro lens, wherein the first light blocking layer is provided with a window; and a second light blocking layer , Arranged on the side of the micro lens; a photosensitive unit is arranged under the first light blocking layer, wherein the micro lens is used for converging a light signal from above the micro lens to the window, and An optical signal is transmitted to the photosensitive unit through the window.
  • the optical image acquisition unit in the embodiment of the present application can be arranged in a display screen, thereby saving the assembly space of the optical image acquisition product.
  • using micro lenses to converge the optical signals can also improve the imaging quality, thereby improving the optical image acquisition product. Performance.
  • the optical image acquisition unit is disposed in a display screen.
  • the display screen is an organic light emitting diode OLED screen
  • the optical image acquisition unit is disposed at a position between adjacent color units of pixels of the OLED screen.
  • the optical image acquisition unit is disposed between an anode and a cathode of the OLED screen.
  • the photosensitive unit multiplexes the anode and the cathode of the OLED screen to form a light signal detection circuit.
  • the display screen is a liquid crystal display LCD screen
  • the optical image acquisition unit is disposed at a position of a part of color units of pixels of the LCD screen.
  • the photosensitive unit is disposed on a thin film transistor (TFT) layer of the LCD screen.
  • TFT thin film transistor
  • the photosensitive unit multiplexes the circuit of the TFT layer to form an optical signal detection circuit.
  • the photosensitive unit includes a photodiode, and the photodiode is connected in parallel with an energy storage capacitor of a circuit of the TFT layer.
  • a light leakage channel is provided above the optical image acquisition unit in the LCD screen, and the light leakage channel is in an open state when the light sensing unit detects a light signal.
  • the light signal detected by the photosensitive unit is used to form a pixel of the collected image.
  • a focal point of the micro lens is located within the window.
  • the window is cylindrical.
  • the diameter of the window is greater than 100 nm.
  • the number of the windows is one or more.
  • the transmittance of the first light-blocking layer and the second light-blocking layer to visible light or light in a band above 610 nm is less than 20%.
  • the optical image acquisition unit further includes: a medium layer for transmitting the optical signal, which is disposed at least one of the following: between the micro lens and the first light blocking layer, Within the window or between the first light blocking layer and the photosensitive unit.
  • the material of the micro lens is transparent glue.
  • the optical image acquisition unit further includes: a filter layer, which is disposed in an optical path between the micro lens and the photosensitive unit, and is configured to filter out optical signals in a non-target band and transmit The optical signal of the target band.
  • a filter layer which is disposed in an optical path between the micro lens and the photosensitive unit, and is configured to filter out optical signals in a non-target band and transmit The optical signal of the target band.
  • the light sensitivity of the photosensitive unit to the optical signal in the target band is greater than a first predetermined threshold, and the quantum efficiency is greater than a second predetermined threshold.
  • an optical image acquisition system including the first aspect or an array of the optical image acquisition units in any possible implementation manner of the first aspect.
  • the optical image acquisition unit is disposed in a display screen, and a setting period of the optical image acquisition unit in the display screen is greater than or equal to a setting period of pixels of the display screen.
  • the optical image acquisition system further includes: a light incident angle screening unit, which is disposed above the optical image acquisition unit and is configured to transmit light in a specific incident angle range and block the specific incident angle. Out of range light.
  • a light incident angle screening unit which is disposed above the optical image acquisition unit and is configured to transmit light in a specific incident angle range and block the specific incident angle. Out of range light.
  • the optical image acquisition system further includes: a support structure for supporting the optical image acquisition unit.
  • the supporting structure is disposed under the display screen.
  • an electronic device including a display screen and the optical image acquisition system in the second aspect or any possible implementation manner of the second aspect, wherein the optical image acquisition system is disposed on the display screen. Inside.
  • FIG. 1 is a schematic diagram of an optical image acquisition unit according to an embodiment of the present application.
  • FIG. 2 is a schematic diagram of an OLED display unit.
  • FIG. 3 is a schematic diagram of an OLED color unit.
  • FIG. 4 is a schematic diagram of a setting position of an optical image acquisition unit according to an embodiment of the present application.
  • FIG. 5 is a schematic diagram of an optical image acquisition unit according to another embodiment of the present application.
  • FIG. 6 is a schematic diagram of a setting position of an optical image acquisition unit according to another embodiment of the present application.
  • FIG. 7 is a schematic diagram of an optical signal detection circuit according to an embodiment of the present application.
  • FIG. 8 is a schematic diagram of a fingerprint original value formed by an array of an optical image acquisition unit according to an embodiment of the present application.
  • FIG. 9 is a schematic diagram of an optical image acquisition unit according to another embodiment of the present application.
  • the technical solution of the embodiment of the present application may be used for optical biometric identification or other optical image acquisition.
  • the optical biometric identification may also be other biometric identification, such as living body identification, etc. This is not limited either.
  • Optical biometrics uses light returned from the top surface of the device display assembly for fingerprint sensing and other sensing operations.
  • the returned light carries information of a target (such as a finger) in contact with the top surface, and a specific optical sensor module is realized by collecting and detecting the returned light.
  • the optical sensor module can be designed to achieve the desired optical imaging by properly configuring the optical elements for collecting and detecting the returned light.
  • Optical biometric identification modules are mainly used to collect user biometric information (such as fingerprint image information).
  • the biometric identification module may specifically include an optical biometric sensor having an optical sensing array, such as an optical fingerprint sensor; the optical sensing array includes a plurality of optical sensing units (photosensitive units), and the The area where the optical sensing array is located corresponds to the biometric acquisition area of the biometric identification module.
  • the biometrics collection area is located in the display area of the display screen. Therefore, when the user needs to unlock the electronic device or verify other biometrics, he only needs to press his finger on the biometrics located on the display screen.
  • the feature collection area can realize the biometric input operation.
  • the electronic device adopting the above structure does not need a special reserved space on the front side to set fingerprint keys (such as the Home key), so a full-screen solution can be adopted. Therefore, the display area of the display screen can be substantially extended to the entire front of the electronic device.
  • the above display screen may be a self-luminous display screen, which uses a display unit with self-luminous light as a display pixel.
  • the display may be an organic light-emitting diode (OLED) display, an active-matrix organic light-emitting diode (AMOLED), or a micro-LED display.
  • the display screen may also be a liquid crystal display (Liquid Crystal Display, LCD) or other passive light-emitting display screens, which are not limited in the embodiments of the present application.
  • the display screen is specifically a touch display screen, which can not only perform screen display, but also detect a user's touch or press operation, thereby providing a user with a human-computer interaction interface.
  • the electronic device may include a touch sensor, and the touch sensor may specifically be a touch panel (TP), which may be disposed on the surface of the display screen, or may be partially integrated or integrated as a whole. To the display screen to form the touch display screen.
  • TP touch panel
  • the light-emitting layer of the display has an array of OLED display units arranged in an array
  • the biometric identification module can use the OLED in which the OLED display is located in the biometric collection area.
  • the display unit ie, the OLED light source
  • the biometric identification module may also use a built-in light source or an external light source to provide a light signal for biometric detection and identification.
  • the optical image acquisition unit can be applied not only to self-luminous displays such as OLED displays, but also to non-self-luminous displays, such as liquid crystal displays or other passive light-emitting displays.
  • the optical sensing array of the biometric identification module is specifically a photodetector array (also referred to as a photodetector array or a photosensitive unit array), which includes a plurality of photodetectors arranged in an array.
  • Photosensitive unit, the photodetector / photosensitive unit can be used as the optical sensing unit as described above.
  • a finger touches, presses, or approaches (for ease of description, collectively referred to as pressing in the present application) in a biometric collection area
  • light emitted from a display unit of the biometric collection area reflects on the finger and forms reflected light, where
  • the reflected light may carry biometric information of a user's finger.
  • the reflected light is returned to the display screen and received by the photodetector array of the biometric identification module below it and converted into a corresponding electric signal, that is, a biometric detection signal.
  • the electronic device can obtain the user's biometric information based on the biometric detection signal, and can further perform biometric matching verification to complete the identity verification of the current user in order to confirm whether he has the authority to perform corresponding operations on the electronic device .
  • the electronic device further includes a protective cover, which may be specifically a transparent cover, such as a glass cover or a sapphire cover, which is located above the display screen and covers the cover.
  • a protective cover which may be specifically a transparent cover, such as a glass cover or a sapphire cover, which is located above the display screen and covers the cover.
  • the front surface of the electronic device, and a surface of the protective cover may further be provided with a protective layer. Therefore, in the embodiments of the present application, the so-called finger pressing on the display screen may actually mean that the finger presses a cover plate above the display screen or a surface of a protective layer covering the cover plate.
  • the optical biometric identification module may be disposed below the display screen to form a biometric identification module under the screen.
  • the thickness of the module will increase accordingly, which will take up a lot of space.
  • the embodiments of the present application provide an improved optical image acquisition solution, which can set a module in a display screen, thereby improving the performance of an optical image acquisition product.
  • FIG. 1 shows a schematic diagram of an optical image acquisition unit 100 according to an embodiment of the present application.
  • the optical image acquisition unit 100 in FIG. 1 may constitute a pixel unit of an optical image acquisition system.
  • the optical image acquisition unit 100 may include a micro lens 110, a first light blocking layer 120, a second light blocking layer 130, and a photosensitive unit 140.
  • the first light-blocking layer 120 is disposed under the micro lens 110; the second light-blocking layer 130 is disposed on the side of the micro-lens 110; and the photosensitive unit 140 is disposed on the first light-blocking layer 120.
  • the first light blocking layer 120 is provided with a window 121.
  • An optical signal can pass through the window 121 but cannot pass through the first light blocking layer 120.
  • the second light-blocking layer 130 on the side of the micro lens 110 can prevent light signals on the side of the micro lens 110 from entering the micro lens 110, thereby preventing crosstalk between image acquisition units.
  • the transmittance of the first light-blocking layer 120 and the second light-blocking layer 130 to visible light or light in a wavelength band above 610 nm is less than 20%, which prevents the corresponding light from passing through.
  • the first light blocking layer 120 and the second light blocking layer 130 may be metal layers.
  • first light blocking layer 120 and the second light blocking layer 130 may use the same light blocking material, or may use different light blocking materials, as long as the light blocking effect is satisfied.
  • the micro lens 110 is configured to converge a light signal from above the micro lens 110 to the window 121, and the light signal is transmitted to the photosensitive unit 140 through the window 121.
  • the first light-blocking layer 120 and the second light-blocking layer 130 Due to the existence of the first light-blocking layer 120 and the second light-blocking layer 130, only the light signals from above the micro lens 110 can be transmitted to the photosensitive unit 140 through the window 121.
  • the micro lens 110 may be various lenses having a convergence function.
  • the focal point of the micro lens 110 is located in the window 121.
  • the material of the micro lens may be an organic material, such as resin or transparent glue.
  • the window 121 is used for the light focused by the micro lens 110.
  • the number of the windows 121 in the first light blocking layer 120 may be one or more.
  • the window 121 is cylindrical, that is, the window 121 may be a small hole in the light blocking layer 120.
  • the diameter of the window 121 is greater than 100 nm, so as to facilitate transmission of required light for imaging.
  • the diameter of the window 121 is also smaller than a predetermined value to ensure that the first light blocking layer 120 can block unwanted light. That is, the parameter setting of the window 121 enables the optical signal required for imaging by the optical image acquisition unit 100 to be transmitted to the photosensitive unit 140 to a maximum extent, and unnecessary light is blocked to a maximum extent.
  • the parameters of the window 121 may be set to maximize the transmission of light signals that are incident vertically downward in the corresponding area above the optical image acquisition unit 100 to the photosensitive unit 140 and block other light signals to the maximum.
  • the photosensitive unit 140 can detect a light signal from a corresponding area above the micro lens 110, and can further obtain a pixel value according to the light intensity of the light signal.
  • the light signal detected by the light sensing unit 140 may be used to form a pixel of a captured image, where the pixel represents a characteristic value of a corresponding area above the optical image capturing unit 100. That is, the signals collected by one optical image acquisition unit 100 form one pixel of the image. In this way, one image can be obtained through multiple optical image acquisition units 100.
  • the photosensitive unit 140 is configured to convert an optical signal into an electrical signal.
  • the photosensitive unit 140 may be a complementary metal oxide semiconductor (Complementary Metal Oxide Semiconductor) device.
  • a semiconductor device composed of a PN junction, for example, a photodiode, has a unidirectional conductivity characteristic.
  • the photosensitivity of the light sensing unit 140 with respect to a light signal in a target band is greater than a first predetermined threshold, and the quantum efficiency is greater than a second predetermined threshold.
  • the first predetermined threshold may be 0.5v / lux-sec
  • the second predetermined threshold may be 40%.
  • the photosensitive unit 140 has higher light sensitivity and higher quantum for blue light (wavelength 460 ⁇ 30nm), green light (wavelength 540 ⁇ 30nm), red light or infrared light (wavelength ⁇ 610nm). Efficiency to facilitate detection of the corresponding light.
  • the photosensitive material of the photosensitive unit 140 may be selected from materials such as hafnium oxide, that is, materials with high sensitivity and stable structure, but this embodiment is not limited thereto.
  • the above-mentioned parameters of the photosensitive unit 140 may correspond to light required for optical image collection.
  • the above-mentioned parameters of the photosensitive unit 140 are only It is only necessary to meet the requirements of light in this wavelength band.
  • the optical image acquisition unit 100 adopting the above design can be set in a display screen, thereby saving the assembly space of the optical image acquisition products.
  • the use of micro lenses to converge the optical signals can also improve the imaging quality, thereby improving the optical image acquisition products. Performance.
  • the optical image acquisition unit 100 may adopt a corresponding design, which is described below respectively.
  • the optical image acquisition unit 100 may be disposed at a position between adjacent color units of pixels of the OLED screen.
  • the OLED screen is composed of many display units. As shown in FIG. 2, each display unit mainly includes a glass substrate, a hole transport layer, an organic light emitting layer, an electron transport layer, an anode, and a cathode.
  • the organic light emitting layer is located between the electron transport layer and the hole transport layer.
  • the hole-transporting layer and the electron-transporting layer are respectively connected to the anode and the cathode.
  • the organic light-emitting layer will emit light, and the organic light-emitting layer will use different materials to emit red, green, and blue light.
  • These different-color light-emitting units can be fixed according to certain graphic rules
  • the light emitting unit period includes at least one red, green, and blue color unit in each period.
  • the distance between the red, green, and blue color units is usually a certain distance according to different resolutions, such as 570ppi, the distance between adjacent color units is about 45um, and the pixel unit distance for fingerprint collection can be less than 50um.
  • the size of the photosensitive unit is usually less than 12.5um. 12.5umx12.5um is arranged below the 45umx45um area, and the light leakage ratio is still about 75%, which is close to 80% of human eye sensitivity. If the size of the photosensitive unit is smaller, it will not affect the display effect of the display screen.
  • FIG. 4 is a white light lighting effect diagram of an OLED screen under a microscope. As shown in FIG. 4, the optical image acquisition unit 100 may be disposed between adjacent color units.
  • the optical image acquisition unit 100 is disposed between an anode and a cathode of the OLED screen.
  • the photosensitive unit 140 may multiplex the anode and the cathode of the OLED screen to form a light signal detection circuit.
  • the original structure of the original OLED screen can be reused to the greatest extent, for example, the metal cathode or anode of the OLED screen is reused, only replacing the original hole transport Layer, organic light-emitting layer, and electron layer.
  • the optical signal detection circuit may also adopt a separate circuit, that is, a circuit of the OLED screen light-emitting unit may not be multiplexed, which is not limited in the embodiment of the present application.
  • the information in the area is fed back to the processor, that is, a fixed OLED light-emitting area can be set in the center of the area.
  • This light-emitting area provides a light source for fingerprint recognition.
  • the position, shape, Colors and bands can be set as required.
  • the light information is fed back to the pressed fingerprint.
  • the intensity of the peak or valley feedback is directly proportional to the fingerprint information.
  • the optical image acquisition unit 100 is disposed at a position of a part of a color unit of a pixel of the LCD screen.
  • the optical image acquisition unit 100 may occupy a part of a color unit in a pixel.
  • the photosensitive unit 140 may be disposed on a thin film transistor (TFT) layer of the LCD screen.
  • the photosensitive unit 140 may multiplex the circuits of the TFT layer to form an optical signal detection circuit.
  • the photosensitive unit 140 may be a photodiode shown in the figure, which has a photosensitive material, and encounters light to form a ground leakage current.
  • the photodiode is connected in parallel with the energy storage capacitor of the circuit of the TFT layer of the LCD screen.
  • the triode and the energy storage capacitor in the circuit of the TFT layer constitute a detection circuit.
  • the corresponding comparative current data is transmitted.
  • the intensity of light is proportional to the leakage current.
  • the corresponding coordinate information and the corresponding leakage current magnitude information are fed back through the corresponding channels, so that the corresponding position information and fingerprint information can be obtained.
  • a light leakage channel is provided above the optical image acquisition unit 100 in the LCD screen, and the light leakage channel is in an open state when the light sensing unit 140 detects a light signal.
  • the structure above the TFT layer needs to be specially set for the photosensitive unit so that it can be transmitted sufficiently during the light signal detection by the photosensitive unit.
  • Light signal For example, in each layer above the TFT layer, such as a color filter layer, a light leakage channel may be provided at a position corresponding to the photosensitive unit, and the light leakage channel is at least open when the photosensitive unit detects an optical signal.
  • the information acquired by each optical image acquisition unit 100 may be used to form a pixel of an acquired image.
  • An entire acquired image can be obtained by an array formed by a plurality of optical image acquisition units 100.
  • each optical image acquisition unit 100 will feel the intensity of the light concentrated above it, and then convert it into an electrical signal through the photosensitive unit 140 to form the original fingerprint value.
  • the array of the optical image acquisition unit 100 obtains the original fingerprint value of the entire recognition area, as shown in FIG. 8, and finally obtains a fingerprint image.
  • the optical image acquisition unit 100 may further include:
  • the dielectric layer is configured to transmit the optical signal and is disposed at least one of the following:
  • the medium layer may be connected to the micro lens 110, the first light blocking layer 120, and the photosensitive unit 140.
  • the dielectric layer is used to transmit the optical signal, that is, to transmit the optical signal.
  • the dielectric layer may include:
  • the transparent medium layer 150 is disposed in the window 121 and above the first light blocking layer 120;
  • the passivation layer 160 is disposed between the micro lens 110 and the transparent medium layer 150.
  • the transparent medium layer 150 includes a first transparent medium layer 151 and a second transparent medium layer 152, wherein the second transparent medium layer 152 is used to connect the first transparent medium layer 151 and the passivation layer. ⁇ ⁇ 160 ⁇ The layer 160.
  • the first transparent medium layer 151 covers the first light blocking layer 120 to protect the first light blocking layer 120.
  • the second transparent dielectric layer 152 that is better combined with the passivation layer 160 may be used to connect the first The transparent dielectric layer 151 and the passivation layer 160.
  • the passivation layer 160 may be made of the same organic material as the micro lens, the first transparent dielectric layer 151 may be silicon oxide, and the second transparent dielectric layer 152 may be silicon nitride to achieve them. the connection between.
  • the micro lens 110 and the passivation layer 160 may be an integrated structure. That is, the micro lens 110 and the passivation layer 160 can be processed from a single organic material.
  • the micro lens 110 and the passivation layer 160 may not be integrated structures, and different materials may also be used.
  • other connection layers may be used for connection between them.
  • the optical image acquisition unit 100 may further include:
  • a filter layer is provided in the optical path between the micro lens 110 and the photosensitive unit 140, and is used to filter out optical signals in a non-target band and transmit the optical signals in the target band (i.e., light in a band required for optical image acquisition) signal).
  • any dielectric layer in the middle of the optical path can be coated to form a filter layer.
  • the transmittance of the filter layer to light in the target band is ⁇ 80%
  • the cut-off rate to light in the non-target band is ⁇ 80%.
  • An embodiment of the present application further provides an optical image acquisition system, which includes the array of the optical image acquisition unit 100 described in the embodiment of the present application.
  • each optical image acquisition unit 100 corresponds to one pixel of an acquired image, and the optical image acquisition system obtains the acquired images through an array of multiple optical image acquisition units 100.
  • the optical image acquisition unit is disposed in a display screen, for example, it is disposed in the display screen in the aforementioned various manners.
  • a setting period of the optical image acquisition unit 100 in the display screen is greater than or equal to a setting period of pixels of the display screen.
  • the number of optical image acquisition units 100 in each row or column of the array is not less than ten.
  • the setting period or number of the optical image acquisition unit 100 may be set according to factors such as the requirements of image resolution, the size of the image acquisition area, and the like in this embodiment of the present application.
  • the optical image acquisition system further includes:
  • the light incident angle screening unit is disposed above the optical image acquisition unit 100 and is configured to transmit light of a specific incident angle range and block light outside the specific incident angle range.
  • the light incident angle screening unit is used for angle screening.
  • the incident angle required by the light incident angle screening unit may be very small to select an optical signal that is incident substantially vertically downward.
  • the optical image acquisition system may further include a support structure for supporting the optical image acquisition unit.
  • the supporting structure may be disposed under the display screen to support the optical image acquisition unit.
  • optical image acquisition system may further include a corresponding processing chip and the like, which is not limited in the embodiments of the present application.
  • An embodiment of the present application further provides an electronic device.
  • the electronic device may include a display screen and the optical image acquisition system in the foregoing embodiment of the present application, wherein the optical image acquisition system is disposed in the display screen.
  • the electronic device may be any electronic device having a display screen.
  • the display screen can be the display screen described in the above description, such as an OLED screen or an LCD screen.
  • the related description of the display screen and the setting method of the optical image acquisition unit refer to the related description in the above description. For brevity, it will not be repeated here.
  • the disclosed systems and devices may be implemented in other ways.
  • the device embodiments described above are only schematic.
  • the division of the unit is only a logical function division.
  • multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not implemented.
  • the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may also be electrical, mechanical or other forms of connection.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, may be located in one place, or may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions in the embodiments of the present application.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist separately physically, or two or more units may be integrated into one unit.
  • the above integrated unit may be implemented in the form of hardware or in the form of software functional unit.
  • the integrated unit When the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it may be stored in a computer-readable storage medium.
  • the technical solution of this application is essentially a part that contributes to the existing technology, or all or part of the technical solution may be embodied in the form of a software product, which is stored in a storage medium
  • Included are instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in the embodiments of the present application.
  • the foregoing storage media include: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disks or optical disks and other media that can store program codes .

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Human Computer Interaction (AREA)
  • General Physics & Mathematics (AREA)
  • Multimedia (AREA)
  • Theoretical Computer Science (AREA)
  • Electroluminescent Light Sources (AREA)
  • Image Input (AREA)

Abstract

本申请实施例公开了一种光学图像采集单元、光学图像采集系统和电子设备。该光学图像采集单元包括：微镜头；第一挡光层，设置于所述微镜头下方，其中，所述第一挡光层设置有窗口；第二挡光层，设置于所述微镜头侧方；感光单元，设置于所述第一挡光层下方，其中，所述微镜头用于将来自所述微镜头上方的光信号汇聚至所述窗口，所述光信号经由所述窗口传输至所述感光单元。本申请实施例的技术方案，能够提升光学图像采集产品的性能。

Description

光学图像采集单元、光学图像采集系统和电子设备 技术领域
本申请实施例涉及信息技术领域，并且更具体地，涉及一种光学图像采集单元、光学图像采集系统和电子设备。
背景技术
随着终端行业的高速发展，生物特征识别技术，例如，指纹识别技术，越来越受到人们重视。
在生物特征识别技术中，光学图像采集方式是其中比较重要的实现方式。随着终端产品的发展，对生物特征识别的要求越来越高，例如，要求较大的识别区域和较小的装配空间，相应地，对光学图像采集产品的要求也越来越高。
因此，如何提升光学图像采集产品的性能，成为一个亟待解决的技术问题。
发明内容
本申请实施例提供了一种光学图像采集单元、光学图像采集系统和电子设备，能够提升光学图像采集产品的性能。
第一方面，提供了一种光学图像采集单元，包括：微镜头；第一挡光层，设置于所述微镜头下方，其中，所述第一挡光层设置有窗口；第二挡光层，设置于所述微镜头侧方；感光单元，设置于所述第一挡光层下方，其中，所述微镜头用于将来自所述微镜头上方的光信号汇聚至所述窗口，所述光信号经由所述窗口传输至所述感光单元。
本申请实施例的光学图像采集单元可以设置于显示屏内，因而能够节约光学图像采集产品的装配空间，另外，利用微镜头对光信号进行汇聚又可以提高成像质量，从而能够提升光学图像采集产品的性能。
在一些可能的实现方式中，所述光学图像采集单元设置于显示屏内。
在一些可能的实现方式中，所述显示屏为有机发光二极管OLED屏，所述光学图像采集单元设置于所述OLED屏的像素的相邻颜色单元之间的位置。
在一些可能的实现方式中，所述光学图像采集单元设置于所述OLED屏的阳极和阴极之间。
在一些可能的实现方式中，所述感光单元复用所述OLED屏的阳极和阴极形成光信号检测电路。
在一些可能的实现方式中，所述显示屏为液晶显示LCD屏，所述光学图像采集单元设置于所述LCD屏的像素的部分颜色单元的位置。
在一些可能的实现方式中，所述感光单元设置于所述LCD屏的薄膜晶体管TFT层。
在一些可能的实现方式中，所述感光单元复用所述TFT层的电路形成光信号检测电路。
在一些可能的实现方式中，所述感光单元包括光电二极管，所述光电二极管与所述TFT层的电路的储能电容并联。
在一些可能的实现方式中，所述LCD屏内在所述光学图像采集单元上方设置有漏光通道，所述漏光通道在所述感光单元检测光信号时处于打开状态。
在一些可能的实现方式中，所述感光单元检测的光信号用于形成采集图像的一个像素。
在一些可能的实现方式中，所述微镜头的聚焦点位于所述窗口内。
在一些可能的实现方式中，所述窗口为圆柱形。
在一些可能的实现方式中，所述窗口的直径大于100nm。
在一些可能的实现方式中，所述窗口的数量为一个或多个。
在一些可能的实现方式中，所述第一挡光层和所述第二挡光层对可见光或者610nm以上波段的光的透过率小于20％。
在一些可能的实现方式中，所述光学图像采集单元还包括：介质层，用于传输所述光信号，设置于以下至少一处：所述微镜头与所述第一挡光层之间、所述窗口内或所述第一挡光层与所述感光单元之间。
在一些可能的实现方式中，所述微镜头的材料为透明胶。
在一些可能的实现方式中，所述光学图像采集单元还包括：滤波层，设置于所述微镜头到所述感光单元之间的光路中，用于滤掉非目标波段的光信号，透过目标波段的光信号。
在一些可能的实现方式中，所述感光单元对于目标波段的光信号的光灵 敏度大于第一预定阈值，量子效率大于第二预定阈值。
第二方面，提供了一种光学图像采集系统，包括：第一方面或第一方面的任意可能的实现方式中的光学图像采集单元的阵列。
在一些可能的实现方式中，所述光学图像采集单元设置于显示屏内，所述光学图像采集单元在所述显示屏内的设置周期大于或等于所述显示屏的像素的设置周期。
在一些可能的实现方式中，所述光学图像采集系统还包括：光入射角度筛选单元，设置于所述光学图像采集单元上方，用于透过特定入射角度范围的光，阻挡所述特定入射角度范围外的光。
在一些可能的实现方式中，所述光学图像采集系统还包括：支撑结构件，用于支撑所述光学图像采集单元。
在一些可能的实现方式中，所述支撑结构件设置于显示屏下。
第三方面，提供了一种电子设备，包括：显示屏以及第二方面或第二方面的任意可能的实现方式中的光学图像采集系统，其中，所述光学图像采集系统设置于所述显示屏内。
附图说明
图1是本申请一个实施例的光学图像采集单元的示意图。
图2是OLED显示单元的示意图。
图3是OLED颜色单元的示意图。
图4本申请一个实施例的光学图像采集单元的设置位置示意图。
图5本申请另一个实施例的光学图像采集单元的示意图。
图6本申请另一个实施例的光学图像采集单元的设置位置示意图。
图7是本申请实施例的光信号检测电路的示意图。
图8是本申请实施例的光学图像采集单元的阵列所形成的指纹原始值示意图。
图9是本申请又一个实施例的光学图像采集单元的示意图。
具体实施方式
下面将结合附图，对本申请实施例中的技术方案进行描述。
本申请实施例的技术方案可以应用于各种电子设备，例如智能手机、笔 记本电脑、平板电脑、游戏设备等便携式或移动计算设备，以及电子数据库、汽车、银行自动柜员机(Automated Teller Machine，ATM)等其他电子设备，但本申请实施例对此并不限定。
本申请实施例的技术方案可以用于光学生物特征识别或者其他光学图像采集，其中，光学生物特征识别除了光学指纹识别外，还可以为其他生物特征识别，例如，活体识别等，本申请实施例对此也不限定。为了便于理解本申请实施例的技术方案，下面首先对光学生物特征识别技术进行介绍。
光学生物特征识别技术使用从设备显示组件的顶面返回的光来进行指纹感应和其他感应操作。该返回的光携带与该顶面接触的目标(例如手指)的信息，通过采集和检测该返回的光实现特定光学传感器模块。光学传感器模块的设计可以为通过恰当地配置用于采集和检测返回的光的光学元件来实现期望的光学成像。
光学生物特征识别模组，比如光学指纹模组，其主要用于采集用户的生物特征信息(比如指纹图像信息)。作为一种实施例，所述生物特征识别模组可以具体包括具有光学感应阵列的光学生物特征传感器，比如光学指纹传感器；所述光学感应阵列包括多个光学感应单元(感光单元)，且所述光学感应阵列的所在区域对应所述生物特征识别模组的生物特征采集区域。例如，所述生物特征采集区域位于显示屏的显示区域之中，因此，用户在需要对所述电子设备进行解锁或者其他生物特征验证的时候，只需要将手指按压在位于所述显示屏的生物特征采集区域，便可以实现生物特征输入操作。由于生物特征采集检测可以在所述显示屏的显示区域内部实现，采用上述结构的电子设备无需其正面专门预留空间来设置指纹按键(比如Home键)，因而可以采用全面屏方案。因此，所述显示屏的显示区域可以基本扩展到所述电子设备的整个正面。
上述的显示屏可以为自发光显示屏，其采用具有自发光的显示单元作为显示像素。比如显示屏可以为有机发光二极管(Organic Light-Emitting Diode，OLED)显示屏、有源矩阵有机发光二极管(Active-Matrix Organic Light-Emitting Diode，AMOLED)或者微型发光二极管(Micro-LED)显示屏。在其他替代实施例中，所述显示屏也可以为液晶显示屏(Liquid Crystal Display,LCD)或者其他被动发光显示屏，本申请实施例对此不做限制。
另一方面，所述显示屏具体为触控显示屏，其不仅可以进行画面显示， 还可以检测用户的触摸或者按压操作，从而为用户提供一个人机交互界面。比如，在一种实施例中，电子设备可以包括触摸传感器，所述触摸传感器可以具体为触控面板(Touch Panel,TP)，其可以设置在所述显示屏表面，也可以部分集成或者整体集成到所述显示屏内部，从而形成所述触控显示屏。
以显示屏采用OLED显示屏为例，显示屏的发光层具有呈阵列式排布的OLED显示单元阵列，所述生物特征识别模组可以利用所述OLED显示屏位于所述生物特征采集区域的OLED显示单元(即OLED光源)作为生物特征检测识别的激励光源。当然，应当理解，在其他替代实现方案中，该生物特征识别模组也可以采用内置光源或者外置光源来提供用于进行生物特征检测识别的光信号。在这种情况下，光学图像采集单元不仅可以适用于如OLED显示屏等自发光显示屏，还可以适用于非自发光显示屏，比如液晶显示屏或者其他的被动发光显示屏。并且，所述生物特征识别模组的光学感应阵列具体为光探测器(Photo detector)阵列(或称为光电探测器阵列、感光单元阵列)，其包括多个呈阵列式分布的光探测器/感光单元，所述光探测器/感光单元可以作为如上所述的光学感应单元。
当手指触摸、按压或者接近(为便于描述，在本申请中统称为按压)在生物特征采集区域时，所述生物特征采集区域的显示单元发出的光线在手指发生反射并形成反射光，其中所述反射光可以携带有用户手指的生物特征信息。比如，所述光线被用户手指表面的指纹发生反射之后，由于手指指纹的纹脊和纹谷的反射光是不同的，因此反射光便携带有用户的指纹信息。所述反射光返回显示屏并被其下方的生物特征识别模组的光探测器阵列所接收并且转换为相应的电信号，即生物特征检测信号。电子设备基于所述生物特征检测信号便可以获得用户的生物特征信息，并且可以进一步进行生物特征匹配验证，从而完成当前用户的身份验证以便于确认其是否有权限对所述电子设备进行相应的操作。
应当理解的是，在具体实现上，电子设备还包括保护盖板，所述盖板可以具体为透明盖板，比如玻璃盖板或者蓝宝石盖板，其位于所述显示屏的上方并覆盖所述电子设备的正面，且所述保护盖板表面还可以设置有保护层。因此，本申请实施例中，所谓的手指按压所述显示屏实际上可以是指手指按压在所述显示屏上方的盖板或者覆盖所述盖板的保护层表面。
在一种实施例中，光学生物特征识别模组可以设置在显示屏的下方，形 成屏下生物特征识别模组。随着识别区域越来越大的需求，模组的厚度也相应会增大，这又会占据较大空间。鉴于此，本申请实施例提供了一种改进的光学图像采集方案，可以将模组设置于显示屏内，从而提升光学图像采集产品的性能。
图1示出了本申请一个实施例的光学图像采集单元100的示意图。
图1中的光学图像采集单元100可以构成光学图像采集系统的一个像素单元。
如图1所示，光学图像采集单元100可以包括：微镜头110、第一挡光层120、第二挡光层130和感光单元140。
所述第一挡光层120设置于所述微镜头110下方；所述第二挡光层130设置于所述微镜头110侧方；所述感光单元140设置于所述第一挡光层120下方。
所述第一挡光层120设置有窗口121。光信号可以从所述窗口121通过，而不能通过所述第一挡光层120。
所述微镜头110侧方的所述第二挡光层130可以防止所述微镜头110侧方的光信号进入所述微镜头110，从而可以防止图像采集单元之间互相串扰。
例如，所述第一挡光层120和所述第二挡光层130对可见光或者610nm以上波段的光的透过率小于20％，比避免相应的光通过。可选地，所述第一挡光层120和所述第二挡光层130可以为金属层。
应理解，所述第一挡光层120和所述第二挡光层130可以采用相同的挡光材料，也可以采用不同的挡光材料，只要满足挡光效果即可。
所述微镜头110用于将来自所述微镜头110上方的光信号汇聚至所述窗口121，所述光信号经由所述窗口121传输至所述感光单元140。
由于所述第一挡光层120和所述第二挡光层130的存在，使得仅有来自所述微镜头110上方的光信号能够通过所述窗口121传输至所述感光单元140。
所述微镜头110可以是各种具有汇聚功能的镜头。可选地，所述微镜头110的聚焦点位于所述窗口121内。所述微镜头的材料可以为有机材料，例如树脂或透明胶。
所述窗口121用于通过所述微镜头110汇聚的光。可选地，所述第一挡光层120中所述窗口121的数量可以为一个或多个。可选地，所述窗口121 为圆柱形，即，所述窗口121可以为挡光层120中的小孔。可选地，所述窗口121的直径大于100nm，以便于透过所需的光以进行成像。所述窗口121的直径也要小于预定值，以确保所述第一挡光层120能够阻挡不需要的光。也就是说，所述窗口121的参数设置使得该光学图像采集单元100成像所需的光信号最大化的传输至所述感光单元140，而不需要的光被最大化的阻挡。例如，所述窗口121的参数可以设置为使得该光学图像采集单元100上方对应区域大致垂直向下入射的光信号最大化的传输至所述感光单元140，而最大化阻挡其他光信号。
通过第二挡光层130、微镜头110、第一挡光层120、窗口121和感光单元140的设置，来自微镜头110上方的光信号被汇聚至窗口121，并通过窗口121传输至感光单元140。这样，感光单元140可以检测到来自微镜头110上方对应区域的光信号，进而可以根据光信号的光强获取像素值。
感光单元140检测的光信号可以用于形成采集图像的一个像素，该像素表示该光学图像采集单元100上方对应区域的特征值。也就是说，一个光学图像采集单元100采集的信号形成图像的一个像素，这样，通过多个光学图像采集单元100可以得到一副图像。
所述感光单元140用于将光信号转换为电信号。可选地，所述感光单元140可以采用互补金属氧化物半导体(Complementary Metal Oxide Semiconductor，CMOS)器件，由一个PN结组成的半导体器件，例如，光电二极管，具有单方向导电特性。可选地，所述感光单元140对于目标波段的光信号，例如蓝光、绿光、红光或红外光的光灵敏度大于第一预定阈值，量子效率大于第二预定阈值。例如，该第一预定阈值可以为0.5v/lux-sec，该第二预定阈值可以为40％。也就是说，所述感光单元140对于蓝光(波长为460±30nm)、绿光(波长为540±30nm)、红光或红外光(波长≥610nm)具有较高的光灵敏度和较高的量子效率，以便于检测相应的光。
可选地，所述感光单元140的感光材料可以选用氧化铪等材料，即灵敏度高，结构稳定的材料，但本申请实施例对此并不限定。
应理解，所述感光单元140的上述参数可以对应于光学图像采集所需的光，例如，若光学图像采集所需的光仅为一种波段的光，则所述感光单元140的上述参数仅需要满足该波段的光的要求即可。
采用上述设计的光学图像采集单元100可以设置于显示屏内，因而能够 节约光学图像采集产品的装配空间，另外，利用微镜头对光信号进行汇聚又可以提高成像质量，从而能够提升光学图像采集产品的性能。
在本申请实施例中，对于不同的显示屏，光学图像采集单元100可以采用对应的设计，下面分别进行描述。
可选地，在本申请一个实施例中，在显示屏为OLED屏时，所述光学图像采集单元100可以设置于所述OLED屏的像素的相邻颜色单元之间的位置。
OLED屏由许多个显示单元构成。如图2所示，每个显示单元主要包含玻璃基板、空穴传输层、有机发光层、电子传输层、阳极和阴极等，有机发光层处在电子传输层和空穴传输层之间，空穴传输层和电子传输层分别对应与阳极和阴极连接。当通电后电流通过有机发光层后有机发光层会发光，并且有机发光层选用不同材料会分别发出红、绿、蓝光，这些不同颜色发光单元(颜色单元)按照一定的图形规则摆布即可形成固定的发光单元周期(像素周期)，每个周期内都至少包含了一个红、绿、蓝颜色单元。
如图3所示，红、绿、蓝颜色单元之间的间距通常根据不同分辨率都在一定距离，如570ppi，相邻颜色单元距离45um左右，而指纹采集的像素单元间距只要小于50um即可，且感光单元布置尺寸通常在12.5um以下。12.5umx12.5um布置在45umx45um区域以下，漏光比仍然在75％左右，接近人眼敏感度80％，如果感光单元尺寸更小则更不影响显示屏的显示效果。所以，本申请实施例利用OLED屏固定周期中间存在的间隙，布置合适的光学图像采集单元，实现信号采集，例如指纹的信号侦测，同时其足够小不影响显示效果。图4为显微镜下OLED屏白光点亮效果图，如图4中所示，光学图像采集单元100可以设置于相邻颜色单元之间的位置。
可选地，在显示屏的厚度方向上，所述光学图像采集单元100设置于所述OLED屏的阳极和阴极之间。另外，可选地，所述感光单元140可以复用所述OLED屏的阳极和阴极形成光信号检测电路。
如图5所示，光学图像采集单元100在OLED屏内集成时，可以最大限度的复用原先OLED屏内固有结构，例如，复用OLED屏的金属阴极或阳极，仅替换原来的空穴传输层、有机发光层和电子层传输即可。
可选地，光信号检测电路也可以采用单独的电路，即，也可以不复用OLED屏发光单元的电路，本申请实施例对此并不限定。
以指纹识别为例，当手指按压到显示区域时，该区域的信息反馈到处理器，即可以该区域中心设置固定的OLED发光区，这个发光区为指纹识别提供光源，光源的位置、形状、颜色和波段可以按照需求来设定。光照信息反馈到按压的指纹上，峰或谷反射的光到感光单元的光强会存在差异，进而感光单元感受到不同的光强，而形成不同的对地漏电电流，电流的大或者小与峰或谷反馈的光强成正比关系，从而可以得到指纹信息。
应理解，上述设计适用于所有发光二极管(Light Emitting Diode，LED)类屏，比如OLED，AMOLED，Micro-LED等。
可选地，在本申请一个实施例中，在显示屏为LCD屏时，所述光学图像采集单元100设置于所述LCD屏的像素的部分颜色单元的位置。
如图6所示，光学图像采集单元100可以占用像素中一个颜色单元的部分位置。
可选地，所述感光单元140可以设置于所述LCD屏的薄膜晶体管(Thin Film Transistor，TFT)层。另外，可选地，所述感光单元140可以复用所述TFT层的电路形成光信号检测电路。
例如，如图7所示，感光单元140可以为图中所示的光电二极管，其具有感光材料，遇到光线会形成对地漏电电流。所述光电二极管与LCD屏的TFT层的电路的储能电容并联。TFT层的电路中的三极管和储能电容组成一个侦测电路，当侦测到光电二极管有漏电电流时，即传送相应的比较电流数据。光强弱与漏电电流成正比关系。此电路对于电流的侦测要通过相应的通道反馈对应的坐标信息，以及对应的漏电电流大小的信息，这样即可得到相应的位置信息，以及指纹的信息。
光学图像采集单元100在LCD屏内集成时，所述LCD屏内在所述光学图像采集单元100上方要设置有漏光通道，所述漏光通道在所述感光单元140检测光信号时处于打开状态。
具体而言，为了确保处在TFT层的感光单元能够最大限度的感测上方的光强变化，TFT层上方结构需要针对感光单元进行特别设置，以使在感光单元检测光信号期间能够传输下来足够的光信号。例如，可以在TFT层上方的各层中，如彩色滤光层等，在感光单元对应的位置处设置漏光通道，该漏光通道至少在感光单元检测光信号时处于打开状态。
在本申请实施例中，每个光学图像采集单元100获取的信息可以用于形 成采集图像的一个像素。通过多个光学图像采集单元100形成的阵列可以得到整个采集图像。
以指纹感测为例，每个光学图像采集单元100会感受到其上方汇聚的光强，再通过感光单元140转化成电信号形成指纹原始值。光学图像采集单元100的阵列得到整个识别区的指纹原始值，如图8所示，进而最终获得指纹图像。
可选地，在本申请一个实施例中，所述光学图像采集单元100还可以包括：
介质层，用于传输所述光信号，设置于以下至少一处：
所述微镜头110与所述第一挡光层120之间、所述窗口121内或所述第一挡光层120与所述感光单元140之间。
所述介质层可连接所述微镜头110、所述第一挡光层120和所述感光单元140。所述介质层用于传输所述光信号，即可透过所述光信号。
可选地，在本申请一个实施例中，如图9所示，介质层可以包括：
透明介质层150，设置于所述窗口121内以及所述第一挡光层120上方；
钝化层160，设置于所述微镜头110与所述透明介质层150之间。
可选地，所述透明介质层150包括第一透明介质层151和第二透明介质层152，其中，所述第二透明介质层152用于连接所述第一透明介质层151和所述钝化层160。
所述第一透明介质层151覆盖所述第一挡光层120，可以实现对所述第一挡光层120的保护。在所述第一透明介质层151与所述钝化层160的结合不够好的情况下，可以采用与所述钝化层160结合更好的所述第二透明介质层152连接所述第一透明介质层151和所述钝化层160。
例如，所述钝化层160可以采用与所述微镜头相同的有机材料，所述第一透明介质层151可以为氧化硅，所述第二透明介质层152可以为氮化硅，以实现它们之间的连接。
可选地，所述微镜头110与所述钝化层160可以为一体结构。也就是说，所述微镜头110与所述钝化层160可以由一体的有机材料加工而成。
可选地，所述微镜头110与所述钝化层160也可以不为一体结构，而且还可以采用不同材料。在所述微镜头110与所述钝化层160的结合不够好的情况下，在它们之间还可以采用其他连接层进行连接。
可选地，在本申请一个实施例中，所述光学图像采集单元100还可以包括：
滤波层，设置于所述微镜头110到所述感光单元140之间的光路中，用于滤掉非目标波段的光信号，透过目标波段的光信号(即光学图像采集所需波段的光信号)。
例如，可以在光路中间的任意介质层镀膜，形成滤波层。可选地，滤波层对目标波段的光的透过率≥80％，对非目标波段的光的截止率≥80％。
本申请实施例还提供了一种光学图像采集系统，该光学图像采集系统包括上述本申请实施例的光学图像采集单元100的阵列。
在光学图像采集系统中，每个光学图像采集单元100对应采集图像的一个像素，光学图像采集系统通过多个光学图像采集单元100的阵列得到所采集的图像。
所述光学图像采集单元设置于显示屏内，例如，采用前述各种方式设置于显示屏内。可选地，所述光学图像采集单元100在所述显示屏内的设置周期大于或等于所述显示屏的像素的设置周期。
可选地，所述阵列的每行或每列中的光学图像采集单元100的数量不小于10。
应理解，光学图像采集单元100的设置周期或数量可以根据图像分辨率的要求、图像采集区域的大小等因素而设定，本申请实施例对此并不限定。
可选地，所述光学图像采集系统还包括：
光入射角度筛选单元，设置于所述光学图像采集单元100上方，用于透过特定入射角度范围的光，阻挡所述特定入射角度范围外的光。
光入射角度筛选单元用于进行角度筛选。例如，光入射角度筛选单元要求的入射角可以非常小，以选择大致垂直向下入射的光信号。
可选地，所述光学图像采集系统还可以包括：支撑结构件，用于支撑所述光学图像采集单元。另外，可选地，所述支撑结构件可以设置于显示屏下，以实现对光学图像采集单元的支撑。
应理解，所述光学图像采集系统还可以包括相应的处理芯片等，本申请实施例对此并不限定。
本申请实施例还提供了一种电子设备，该电子设备可以包括显示屏以及上述本申请实施例的光学图像采集系统，其中，所述光学图像采集系统设置 于所述显示屏内。
该电子设备可以为任何具有显示屏的电子设备。
显示屏可以采用以上描述中的显示屏，例如OLED屏或LCD屏。显示屏的相关说明以及其中光学图像采集单元的设置方式可以参考以上描述中的相关描述，为了简洁，在此不再赘述。
应理解，本申请实施例中的具体的例子只是为了帮助本领域技术人员更好地理解本申请实施例，而非限制本申请实施例的范围。
应理解，在本申请实施例和所附权利要求书中使用的术语是仅仅出于描述特定实施例的目的，而非旨在限制本申请实施例。例如，在本申请实施例和所附权利要求书中所使用的单数形式的“一种”、“上述”和“该”也旨在包括多数形式，除非上下文清楚地表示其他含义。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元，能够以电子硬件、计算机软件或者二者的结合来实现，为了清楚地说明硬件和软件的可互换性，在上述说明中已经按照功能一般性地描述了各示例的组成及步骤。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统、装置，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另外，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口、装置或单元的间接耦合或通信连接，也可以是电的，机械的或其它的形式连接。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本申请实施例方案的目的。
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以是两个或两个以上单元集成在 一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能单元的形式实现。
所述集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分，或者该技术方案的全部或部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(ROM，Read-Only Memory)、随机存取存储器(RAM，Random Access Memory)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到各种等效的修改或替换，这些修改或替换都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以权利要求的保护范围为准。

Claims (26)

  1. 一种光学图像采集单元，其特征在于，包括：
    微镜头；
    第一挡光层，设置于所述微镜头下方，其中，所述第一挡光层设置有窗口；
    第二挡光层，设置于所述微镜头侧方；
    感光单元，设置于所述第一挡光层下方，其中，所述微镜头用于将来自所述微镜头上方的光信号汇聚至所述窗口，所述光信号经由所述窗口传输至所述感光单元。
  2. 根据权利要求1所述的光学图像采集单元，其特征在于，所述光学图像采集单元设置于显示屏内。
  3. 根据权利要求2所述的光学图像采集单元，其特征在于，所述显示屏为有机发光二极管OLED屏，所述光学图像采集单元设置于所述OLED屏的像素的相邻颜色单元之间的位置。
  4. 根据权利要求3所述的光学图像采集单元，其特征在于，所述光学图像采集单元设置于所述OLED屏的阳极和阴极之间。
  5. 根据权利要求4所述的光学图像采集单元，其特征在于，所述感光单元复用所述OLED屏的阳极和阴极形成光信号检测电路。
  6. 根据权利要求2所述的光学图像采集单元，其特征在于，所述显示屏为液晶显示LCD屏，所述光学图像采集单元设置于所述LCD屏的像素的部分颜色单元的位置。
  7. 根据权利要求6所述的光学图像采集单元，其特征在于，所述感光单元设置于所述LCD屏的薄膜晶体管TFT层。
  8. 根据权利要求7所述的光学图像采集单元，其特征在于，所述感光单元复用所述TFT层的电路形成光信号检测电路。
  9. 根据权利要求8所述的光学图像采集单元，其特征在于，所述感光单元包括光电二极管，所述光电二极管与所述TFT层的电路的储能电容并联。
  10. 根据权利要求6至9中任一项所述的光学图像采集单元，其特征在于，所述LCD屏内在所述光学图像采集单元上方设置有漏光通道，所述漏光通道在所述感光单元检测光信号时处于打开状态。
  11. 根据权利要求1至10中任一项所述的光学图像采集单元，其特征在于，所述感光单元检测的光信号用于形成采集图像的一个像素。
  12. 根据权利要求1至11中任一项所述的光学图像采集单元，其特征在于，所述微镜头的聚焦点位于所述窗口内。
  13. 根据权利要求1至12中任一项所述的光学图像采集单元，其特征在于，所述窗口为圆柱形。
  14. 根据权利要求13所述的光学图像采集单元，其特征在于，所述窗口的直径大于100nm。
  15. 根据权利要求1至14中任一项所述的光学图像采集单元，其特征在于，所述窗口的数量为一个或多个。
  16. 根据权利要求1至15中任一项所述的光学图像采集单元，其特征在于，所述第一挡光层和所述第二挡光层对可见光或者610nm以上波段的光的透过率小于20％。
  17. 根据权利要求1至16中任一项所述的光学图像采集单元，其特征在于，所述光学图像采集单元还包括：
    介质层，用于传输所述光信号，设置于以下至少一处：
    所述微镜头与所述第一挡光层之间、所述窗口内或所述第一挡光层与所述感光单元之间。
  18. 根据权利要求1至17中任一项所述的光学图像采集单元，其特征在于，所述微镜头的材料为透明胶。
  19. 根据权利要求1至18中任一项所述的光学图像采集单元，其特征在于，所述光学图像采集单元还包括：
    滤波层，设置于所述微镜头到所述感光单元之间的光路中，用于滤掉非目标波段的光信号，透过目标波段的光信号。
  20. 根据权利要求1至19中任一项所述的光学图像采集单元，其特征在于，所述感光单元对于目标波段的光信号的光灵敏度大于第一预定阈值，量子效率大于第二预定阈值。
  21. 一种光学图像采集系统，其特征在于，包括：
    根据权利要求1至20中任一项所述的光学图像采集单元的阵列。
  22. 根据权利要求21所述的光学图像采集系统，其特征在于，所述光学图像采集单元设置于显示屏内，所述光学图像采集单元在所述显示屏内的 设置周期大于或等于所述显示屏的像素的设置周期。
  23. 根据权利要求21或22所述的光学图像采集系统，其特征在于，所述光学图像采集系统还包括：
    光入射角度筛选单元，设置于所述光学图像采集单元上方，用于透过特定入射角度范围的光，阻挡所述特定入射角度范围外的光。
  24. 根据权利要求21至23中任一项所述的光学图像采集系统，其特征在于，所述光学图像采集系统还包括：
    支撑结构件，用于支撑所述光学图像采集单元。
  25. 根据权利要求24所述的光学图像采集系统，其特征在于，所述支撑结构件设置于显示屏下。
  26. 一种电子设备，其特征在于，包括：显示屏以及
    根据权利要求21至25中任一项所述的光学图像采集系统，其中，所述光学图像采集系统中的光学图像采集单元设置于所述显示屏内。
PCT/CN2018/106965 2018-09-21 2018-09-21 光学图像采集单元、光学图像采集系统和电子设备 Ceased WO2020056728A1 (zh)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/CN2018/106965 WO2020056728A1 (zh) 2018-09-21 2018-09-21 光学图像采集单元、光学图像采集系统和电子设备
CN201880001565.8A CN109416736A (zh) 2018-09-21 2018-09-21 光学图像采集单元、光学图像采集系统和电子设备

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2018/106965 WO2020056728A1 (zh) 2018-09-21 2018-09-21 光学图像采集单元、光学图像采集系统和电子设备

Publications (1)

Publication Number Publication Date
WO2020056728A1 true WO2020056728A1 (zh) 2020-03-26

Family

ID=65462605

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2018/106965 Ceased WO2020056728A1 (zh) 2018-09-21 2018-09-21 光学图像采集单元、光学图像采集系统和电子设备

Country Status (2)

Country Link
CN (1) CN109416736A (zh)
WO (1) WO2020056728A1 (zh)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111523448A (zh) * 2020-04-22 2020-08-11 上海思立微电子科技有限公司 光学指纹识别装置及具有屏下光学指纹识别的电子设备
CN111611987A (zh) * 2020-05-21 2020-09-01 昆山工研院新型平板显示技术中心有限公司 显示装置及利用显示装置实现特征识别的方法
CN111952349A (zh) * 2020-04-06 2020-11-17 神盾股份有限公司 屏内光学生物特征感测装置
CN112600996A (zh) * 2020-12-03 2021-04-02 清华大学 紫外仿生视觉传感器

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN209765526U (zh) * 2019-04-10 2019-12-10 深圳市汇顶科技股份有限公司 光学指纹装置和电子设备
WO2021007700A1 (zh) * 2019-07-12 2021-01-21 深圳市汇顶科技股份有限公司 指纹检测的装置和电子设备
JP2022542243A (ja) * 2019-07-23 2022-09-30 スリーエム イノベイティブ プロパティズ カンパニー マイクロレンズと遮光構造体とを含む光学システム
CN110796122A (zh) * 2019-11-22 2020-02-14 深圳阜时科技有限公司 光学式指纹感测装置和电子设备
CN111104865B (zh) * 2019-11-22 2024-06-14 深圳阜时科技有限公司 光学式生物特征感测装置和手机
WO2021189478A1 (zh) * 2020-03-27 2021-09-30 深圳市汇顶科技股份有限公司 指纹检测的装置和电子设备
CN216625877U (zh) * 2021-12-21 2022-05-27 盛泰光电科技股份有限公司 一种基于flip chip封装工艺的双摄模组

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000190559A (ja) * 1998-12-24 2000-07-11 Funai Electric Co Ltd 露光装置
CN103997596A (zh) * 2014-06-10 2014-08-20 信利光电股份有限公司 摄像模组
CN106210477A (zh) * 2016-08-24 2016-12-07 上海光和光学制造大丰有限公司 一种拍照与虹膜识别兼容的摄像模组

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10497747B2 (en) * 2012-11-28 2019-12-03 Invensense, Inc. Integrated piezoelectric microelectromechanical ultrasound transducer (PMUT) on integrated circuit (IC) for fingerprint sensing
KR20160048643A (ko) * 2014-10-24 2016-05-04 주식회사 비욘드아이즈 지문인식센서
CN105868737B (zh) * 2016-04-29 2021-12-07 格科微电子（上海）有限公司 光学指纹识别装置及其形成方法
CN106022324B (zh) * 2016-08-04 2019-04-30 京东方科技集团股份有限公司 一种纹路识别显示装置
CN107438852B (zh) * 2016-10-25 2020-10-20 深圳市汇顶科技股份有限公司 一种传感器装置及移动终端
CN106897699B (zh) * 2017-02-24 2019-12-31 京东方科技集团股份有限公司 一种指纹识别器件、oled显示装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000190559A (ja) * 1998-12-24 2000-07-11 Funai Electric Co Ltd 露光装置
CN103997596A (zh) * 2014-06-10 2014-08-20 信利光电股份有限公司 摄像模组
CN106210477A (zh) * 2016-08-24 2016-12-07 上海光和光学制造大丰有限公司 一种拍照与虹膜识别兼容的摄像模组

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111952349A (zh) * 2020-04-06 2020-11-17 神盾股份有限公司 屏内光学生物特征感测装置
CN111523448A (zh) * 2020-04-22 2020-08-11 上海思立微电子科技有限公司 光学指纹识别装置及具有屏下光学指纹识别的电子设备
CN111523448B (zh) * 2020-04-22 2023-04-28 上海思立微电子科技有限公司 光学指纹识别装置及具有屏下光学指纹识别的电子设备
CN111611987A (zh) * 2020-05-21 2020-09-01 昆山工研院新型平板显示技术中心有限公司 显示装置及利用显示装置实现特征识别的方法
CN111611987B (zh) * 2020-05-21 2022-08-09 昆山工研院新型平板显示技术中心有限公司 显示装置及利用显示装置实现特征识别的方法
CN112600996A (zh) * 2020-12-03 2021-04-02 清华大学 紫外仿生视觉传感器
CN112600996B (zh) * 2020-12-03 2022-12-09 清华大学 紫外仿生视觉传感器

Also Published As

Publication number Publication date
CN109416736A (zh) 2019-03-01

Similar Documents

Publication Publication Date Title
US11328149B2 (en) Optical image capturing unit, optical image capturing system and electronic device
CN109844766B (zh) 光学图像采集系统和电子设备
EP3731136B1 (en) Optical image collection unit and electronic device
US20200293738A1 (en) Under-screen fingerprint identification apparatus and electronic device
US11403870B2 (en) Fingerprint identification apparatus and electronic device
EP3920087B1 (en) Fingerprint identification method and apparatus, and electronic device
WO2021072753A1 (zh) 指纹检测装置和电子设备
WO2020056771A1 (zh) 指纹识别装置和电子设备
CN111108510B (zh) 指纹检测装置和电子设备
CN111066027B (zh) 图像采集的装置、方法和电子设备
WO2020061823A1 (zh) 光学图像采集单元、光学图像采集装置和电子设备
CN109416736A (zh) 光学图像采集单元、光学图像采集系统和电子设备
KR20210057702A (ko) 광학 지문 장치 및 전자 기기
CN210864751U (zh) 恒流驱动电路和电子设备
CN111213152B (zh) 光学图像采集单元、光学图像采集系统、显示屏和电子设备
CN210864747U (zh) 指纹检测装置和电子设备
KR20220014441A (ko) 지문 인증 장치, 이를 포함하는 표시 장치, 및 지문 인증 방법
CN209765526U (zh) 光学指纹装置和电子设备
CN210038815U (zh) 光学图像采集单元、光学图像采集系统、显示屏和电子设备
CN112528953A (zh) 指纹识别装置、电子设备和指纹识别的方法
CN210295120U (zh) 指纹检测的装置和电子设备
CN111164607B (zh) 指纹检测的装置和电子设备
WO2021056318A1 (zh) 指纹识别的方法、装置和电子设备
KR20220115830A (ko) 지문 인증 장치, 이를 포함하는 표시 장치, 및 지문 인증 방법
WO2020061734A1 (zh) 注册指纹的方法、指纹注册装置和电子设备

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 18934082

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 18934082

Country of ref document: EP

Kind code of ref document: A1