WO2020211536A1 - Procédé de collecte d'empreintes digitales et dispositif électronique - Google Patents

Procédé de collecte d'empreintes digitales et dispositif électronique Download PDF

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Publication number
WO2020211536A1
WO2020211536A1 PCT/CN2020/076614 CN2020076614W WO2020211536A1 WO 2020211536 A1 WO2020211536 A1 WO 2020211536A1 CN 2020076614 W CN2020076614 W CN 2020076614W WO 2020211536 A1 WO2020211536 A1 WO 2020211536A1
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WIPO (PCT)
Prior art keywords
fingerprint
driving
units
drive
signal
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Application number
PCT/CN2020/076614
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English (en)
Chinese (zh)
Inventor
林娇
彭旭
梁朝荣
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华为技术有限公司
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Publication of WO2020211536A1 publication Critical patent/WO2020211536A1/fr

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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
    • G06V40/1306—Sensors therefor non-optical, e.g. ultrasonic or capacitive sensing
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F18/00—Pattern recognition

Definitions

  • This application relates to the field of fingerprint identification, and more specifically, to a fingerprint collection method and electronic equipment.
  • the working principle of fingerprint recognition under the screen in the terminal device is: when a finger is placed on the screen of the terminal device, the terminal device transmits a signal to the finger, and the signal is reflected by the fingerprint of the finger and projected on the sensor array below the screen After imaging, the sensor converts the signal projected on it into an electrical signal, and the fingerprint image can be obtained according to the electrical signal.
  • the light After the light passes through, for example, a cover plate, a polarizer, and a color filter, the light will diffuse.
  • the light from two light sources that are very close to each other passes through a color filter, a polarizer, and a cover, and then illuminates the finger, and then passes through the ridge and valley lines of the finger to reflect back to the cover, polarizer, and color filter. , Then, because the two light sources are very close, the optical signal with fingerprint information may crosstalk due to dispersion, which affects the clarity of the fingerprint image.
  • This application provides a fingerprint identification method and electronic equipment, with the purpose of improving the clarity of collecting fingerprint line information.
  • a method for fingerprint collection is provided, the method is applied to a fingerprint collection device, the fingerprint collection device includes a control module, N drive units and sensors, and the N drive units are used to trigger drive signals, The sensor is used to detect the driving signal after interacting with the fingerprint pattern, and send a fingerprint signal carrying the fingerprint pattern information to the control module, any two adjacent driving units of the N driving units The distance between the units is less than a preset threshold, and N is a positive integer greater than 1.
  • the method includes: the control module determines a first driving unit group from the N driving units, and the first driving unit group includes n A driving unit, wherein n is a positive integer greater than 1 and less than N, and the distance between any two driving units in the n driving units is greater than the preset threshold; the control module starts the first driving Drive units in the unit group, and close the drive units in the N drive units except the first drive unit group; the control module generates a fingerprint image according to the first fingerprint signal sent by the sensor.
  • the spacing between the drive signals can be increased, and crosstalk between the drive signals can be avoided, thereby improving the accuracy of fingerprint image collection. degree.
  • the method further includes: the control module determines a second drive unit group from the N drive units, and the second drive unit group includes m Driving units, where m is a positive integer greater than 1 and less than N, and the distance between any two driving units in the m driving units is greater than the preset threshold; the control module starts the second Drive units in a drive unit group, and close drive units in the N drive units except the second drive unit group; the control module obtains the second fingerprint signal sent by the sensor; and the control module Generating a fingerprint image according to the first fingerprint signal sent by the sensor includes: the control module generates the fingerprint image according to the first fingerprint signal and the second fingerprint signal.
  • control module can synthesize the acquired fingerprint images of different driving frames, and the control module can acquire high-precision fingerprint images to improve the clarity of the fingerprint images.
  • the control module can obtain fingerprint images of multiple driving frames, which adds flexibility to the fingerprint identification matching process.
  • the control module can realize more forms of fingerprint matching process.
  • the control module generates the fingerprint image according to the first fingerprint signal and the second fingerprint signal, including: the control module generates the fingerprint image according to the The first fingerprint signal generates a first fingerprint image; the control module generates a second fingerprint image according to the second fingerprint signal; the control module synthesizes all the fingerprint images according to the first fingerprint image and the second fingerprint image Describe the fingerprint image.
  • the control module generates a fingerprint image according to the first fingerprint signal sent by the sensor, including: the control module obtains the fingerprint image according to the first fingerprint signal N original image blocks corresponding to the n driving units one-to-one; the control module performs the diffusion radius limitation processing on each original image block of the n original image blocks, and generates the same N processing image blocks corresponding to each block; the control module generates the fingerprint image according to the n processing image blocks.
  • the dispersion radius limitation processing is performed on the n original image blocks corresponding to the n driving units in a one-to-one manner, and the fingerprint signal carrying the fingerprint ridge information is limited to a limited space. Then, in the process of synthesizing multiple sets of fingerprint ridge signals, crosstalk between the sets of fingerprint ridge signals can be avoided.
  • the N driving units form an N1 ⁇ N2 driving unit array, and N1, N2 are positive integers greater than 1, and the n driving units are in the same At least one column of driving units is spaced between any two driving units in a row, and at least one row of driving units is spaced between any two driving units in the same column among the n driving units.
  • the n driving units are composed of driving units located in odd rows or even rows in the N1 row, and odd or even columns in the N2 column. composition.
  • the fingerprint image satisfies:
  • B (f x , f y ) is a function representing the signal output by the sensor
  • a (f x , f y ) is a function representing the signal output by one drive unit in the first drive unit group
  • Comb(P x ,f x ) ⁇ comb(P y ,f y ) is the array function of the first drive unit group
  • R(f x ,f y ) is the function representing the fingerprint image
  • H(f x ,f y ) are the activation functions
  • P x represents the period of the drive units in the first drive unit group being arranged in rows
  • P y represents the period of the drive units in the first drive unit group being arranged on the columns
  • F x represents the abscissa
  • f y represents the ordinate.
  • converting analog fingerprint information into digital data is beneficial to improve the processing speed of fingerprint information.
  • the excitation function H(f x , f y ) satisfies:
  • B′(f x ,f y ) is a function representing the signal output by the sensor
  • A′(f x ,f y ) is a function representing the signal output by a driving unit
  • f x represents the abscissa
  • f y represents the ordinate.
  • converting the fingerprint information in the analog state into the data in the digital state is beneficial to improve the processing speed of the fingerprint information.
  • the driving signal is one of an optical signal, an ultrasonic signal, and an electric field signal.
  • the driving signal is an optical signal
  • the N driving units are used to trigger the driving signal to display an image.
  • the optical signal used to display the image is used for fingerprint collection to realize signal and device multiplexing, which can reduce the number of devices in the fingerprint collection device.
  • the N drive units are electrically connected to form a drive circuit
  • the fingerprint collection device further includes: a liquid crystal layer disposed above the drive circuit, so The electrical connection state of the N drive units is used to change the light transmission state of the liquid crystal layer; the backlight module is arranged under the drive circuit and is used to provide a light source for fingerprint collection; wherein, the sensor is arranged close to the The position adjacent to the driving circuit is either arranged above the liquid crystal layer or arranged below the backlight module.
  • the N driving units are N organic light-emitting diodes, the N driving units form a light-emitting layer, and the sensor is arranged above the light-emitting layer , Or arranged under the light-emitting layer.
  • an electronic device including a control module, N drive units, and sensors, where the N drive units are used to trigger a drive signal, and the sensor is used to detect the trigger after interacting with the fingerprint lines Drive signal, and send a fingerprint signal carrying the fingerprint pattern information to the control module, the distance between any two adjacent drive units in the N drive units is less than a preset threshold, and N is greater than 1.
  • control module is used to: determine a first drive unit group from the N drive units, the first drive unit group includes n drive units, where n is a positive integer greater than 1 and less than N , The distance between any two drive units in the n drive units is greater than the preset threshold; the drive units in the first drive unit group are activated, and the drive units in the first drive unit group are turned off.
  • the electronic device may be a terminal device or a component that can be used in a terminal device (for example, a fingerprint collection module or a fingerprint recognition module).
  • control module is further configured to: determine a second drive unit group from the N drive units, and the second drive unit group includes m drives Unit, wherein m is a positive integer greater than 1 and less than N, and the distance between any two drive units in the m drive units is greater than the preset threshold; start the drive in the second drive unit group Unit, and close the drive units of the N drive units except the second drive unit group; obtain the second fingerprint signal sent by the sensor; and the control module is specifically configured to, according to the first fingerprint Signal and the second fingerprint signal to generate the fingerprint image.
  • control module is specifically configured to generate a first fingerprint image based on the first fingerprint signal; generate a second fingerprint based on the second fingerprint signal Image; according to the first fingerprint image and the second fingerprint image, synthesize the fingerprint image.
  • control module is specifically configured to acquire n original image blocks corresponding to the n driving units one-to-one according to the first fingerprint signal; Perform diffusion radius restriction processing on each of the n original image blocks to generate n processed image blocks corresponding to the n original image blocks one-to-one; according to the n processed image blocks, generate The first fingerprint image.
  • the N driving units form an N1 ⁇ N2 driving unit array, and N1, N2 are positive integers greater than 1, and the n driving units are in the same At least one column of driving units is spaced between any two driving units in a row, and at least one row of driving units is spaced between any two driving units in the same column among the n driving units.
  • the n driving units are composed of driving units located in odd or even rows in the N1 row, and odd or even columns in the N2 column. composition.
  • the fingerprint image satisfies:
  • B (f x , f y ) is a function representing the signal output by the sensor
  • a (f x , f y ) is a function representing the signal output by one drive unit in the first drive unit group
  • Comb(P x ,f x ) ⁇ comb(P y ,f y ) is the array function of the first drive unit group
  • R(f x ,f y ) is the function representing the fingerprint image
  • H(f x ,f y ) are the excitation functions
  • P x represents the period of the drive units in the first drive unit group being arranged in rows
  • Y y represents the period of the drive units in the first drive unit group being arranged on the columns
  • F x represents the abscissa
  • f y represents the ordinate.
  • the excitation function H(f x , f y ) satisfies:
  • B′(f x ,f y ) is a function representing the signal output by the sensor
  • A′(f x ,f y ) is a function representing the signal output by a driving unit
  • f x represents the abscissa
  • f y represents the ordinate.
  • the driving signal is one of an optical signal, an ultrasonic signal, and an electric field signal.
  • the driving signal is an optical signal
  • the N driving units are used to trigger the driving signal to display an image.
  • the N drive units are electrically connected to form a drive circuit
  • the device further includes: a liquid crystal layer disposed above the drive circuit, the N The electrical connection state of the driving unit is used to change the light transmission state of the liquid crystal layer; the backlight module is arranged under the driving circuit and is used to provide a light source for fingerprint collection; wherein, the sensor is arranged in an adjacent place The position of the driving circuit is either arranged above the liquid crystal layer or arranged below the backlight module.
  • the N driving units are N organic light emitting diodes, the N driving units form a light emitting layer, and the sensor is disposed above the light emitting layer , Or arranged under the light-emitting layer.
  • Figure 1 is a schematic structural diagram of an electronic device.
  • Fig. 2 is a schematic structural diagram of a liquid crystal display (LCD) screen assembly.
  • LCD liquid crystal display
  • Fig. 3 is a schematic diagram of the dispersion phenomenon of the optical signal.
  • Fig. 4 is a schematic flowchart of a fingerprint collection method according to an embodiment of the present application.
  • Fig. 5 is a schematic diagram of the principle of fingerprint collection according to an embodiment of the present application.
  • Fig. 6 is a schematic structural diagram of a driving unit array according to an embodiment of the present application.
  • Fig. 7 is a schematic structural diagram of a driving unit array according to an embodiment of the present application.
  • Fig. 8 is a schematic structural diagram of a driving unit array according to an embodiment of the present application.
  • Fig. 9 is a schematic structural diagram of a driving unit array according to an embodiment of the present application.
  • Fig. 10 is a schematic structural diagram of a driving unit array according to an embodiment of the present application.
  • Fig. 11 is a schematic structural diagram of a driving unit array according to an embodiment of the present application.
  • Fig. 12 is a schematic structural diagram of a driving unit array according to an embodiment of the present application.
  • Fig. 13 is a schematic structural diagram of a driving circuit according to an embodiment of the present application.
  • Fig. 14 is a schematic structural diagram of a filter array and sensor array according to an embodiment of the present application.
  • Fig. 15 is a schematic structural diagram of a sensor circuit according to an embodiment of the present application.
  • Fig. 16 is a schematic structural diagram of a filter array and a sensor array according to an embodiment of the present application.
  • Fig. 17 is a schematic structural diagram of a filter array and a sensor array according to an embodiment of the present application.
  • Fig. 18 is a schematic structural diagram of an LCD panel assembly according to an embodiment of the present application.
  • Fig. 19 is a schematic structural diagram of a filter array and a sensor array according to an embodiment of the present application.
  • Fig. 20 is a schematic structural diagram of a driving circuit according to an embodiment of the present application.
  • Fig. 21 is a schematic structural diagram of an LCD panel assembly according to an embodiment of the present application.
  • Fig. 22 is a schematic structural diagram of an organic light emitting diode (OLED) screen assembly according to an embodiment of the present application.
  • Fig. 23 is a schematic structural diagram of an OLED screen assembly according to an embodiment of the present application.
  • Fig. 24 is a schematic structural diagram of an OLED screen assembly according to an embodiment of the present application.
  • Fig. 25 is a schematic structural diagram of an OLED screen assembly according to an embodiment of the present application.
  • Fig. 26 is a schematic diagram of a fingerprint image processing process according to an embodiment of the present application.
  • FIG. 1 is a schematic structural diagram of an electronic device 100 provided by an embodiment of the present application.
  • the electronic device 100 may be a mobile phone, a tablet computer, an e-reader, a notebook computer, a vehicle-mounted device, or a wearable device.
  • the electronic device 100 is a mobile phone as an example for description.
  • the electronic device 100 includes a housing 10 and a screen assembly 20.
  • the screen assembly 20 is installed on the housing 10.
  • the housing 10 includes a frame and a back cover.
  • the frame is arranged around the periphery of the back cover.
  • the screen assembly 20 is installed on the side of the frame away from the back cover. That is, the screen assembly 20 and the back cover are respectively installed on both sides of the frame.
  • the screen assembly 20 is usually placed toward the user, and the back cover is placed away from the user.
  • the electronic device 100 further includes a control module 30.
  • the control module 30 is housed inside the casing 10.
  • the control module 30 may include at least one communication interface, a bus, at least one processor, and at least one memory. At least one communication interface, at least one processor, and at least one memory can communicate with each other through a bus. At least one communication interface is used to receive and send data.
  • the screen assembly 20 is connected to one of the communication interfaces, so that the control module 30 can activate the driving unit in the driving circuit 205 to trigger the driving signal, and the data of the comparison image corresponding to the user's fingerprint image can be transmitted to the processor.
  • At least one memory is used to store program codes.
  • the program code includes fingerprint identification code.
  • At least one processor can be used to execute the above application code. For example, at least one processor can execute fingerprint recognition codes to realize fingerprint recognition. In this application, "at least one" includes one or two cases.
  • FIG. 2 is a schematic diagram of the structure of the screen assembly 20 of the electronic device 100 shown in FIG. 1.
  • the screen assembly 20 includes a cover plate 201, an upper polarizer 202, a color film substrate 203, a liquid crystal layer 204, a driving circuit 205, a lower polarizer 206, a light emitting diode (LED) 230 for providing a light source, and an antireflection film 207, homogenizing layer 208, light guiding layer 209, reflective film 210, and substrate 211.
  • the above components are stacked.
  • the above-mentioned components can be assembled by materials such as optically clear adhesive (OCA).
  • OCA optically clear adhesive
  • the reflective film 210 and the substrate 211 block the light from passing through the screen assembly 20 to the inside of the electronic device 100.
  • the LED230 serves as a light source to provide light signals.
  • the light guide layer 209 evenly disperses the light signal incident from the LED 230 to the entire plane.
  • the homogenizing layer 208 makes the optical signal more uniform.
  • the anti-reflection film 207 increases the transmission intensity of the light signal emitted by the anti-reflection film 207.
  • the upper polarizer 202 and the lower polarizer 206 laminated on both sides of the liquid crystal layer 204 are used to change the polarization characteristics of the optical signal.
  • the driving circuit 205 disposed between the liquid crystal layer 204 and the lower polarized light 206 controls whether the liquid crystal in the liquid crystal layer 204 transmits or does not transmit light, that is, whether the light incident from the antireflection film 207 passes through the liquid crystal layer 204 to reach the human eye or finger.
  • a plurality of driving units may be provided on the driving circuit 205.
  • a driving unit may be one or more thin film transistors (TFT).
  • TFT thin film transistors
  • the power state of the driving unit can be controlled, thereby controlling the light transmission state of the liquid crystal in the liquid crystal layer 204.
  • the rectangle filled with diamonds in FIG. 2 represents the driving unit 223 in the driving circuit 205 in the activated state
  • the rectangle filled with dot matrix in FIG. 2 represents the driving unit 222 in the driving circuit 205 in the closed state.
  • the driving unit 223 in the activated state drives the liquid crystal cell to transmit light
  • the driving unit 222 in the off state drives the liquid crystal cell to not transmit light.
  • starting the driving unit may mean that the driving signal triggered by the driving unit satisfies a condition, so that the sensor can collect fingerprint pattern information. For example, it may be that the strength of the driving signal triggered by the driving unit is greater than a specific value.
  • turning off the driving unit or powering off the driving unit may mean that the driving signal triggered by the driving unit does not meet the requirements of fingerprint recognition, or the sensor cannot detect the driving signal after the driving signal interacts with the finger.
  • the drive circuit 205 provides a very low voltage for the drive unit. Although the drive unit is in a power-on state, the strength of the drive signal (such as light signal) provided by it is too low to reach the finger or cannot be received by the sensor after being reflected by the finger. . In this case, even if the drive circuit 205 powers on the drive unit, it can be considered that the drive unit is in a closed state that cannot work normally.
  • Figure 3 shows a schematic diagram of a driving circuit.
  • the control module 30 controls the scanning lines on the driving circuit 205 to be energized, so that the driving unit 2051 can drive the liquid crystal to transmit light.
  • the color filter substrate 203 may include red (red, R), green (green, G) and blue (blue, B) filters.
  • the shape of the filter can be rectangular, sickle, oval, etc.
  • the light emitted from the liquid crystal layer 204 passes through the color film substrate 203 to form colored light.
  • the colored light passing through the cover 201 can be incident on human eyes or irradiated on the fingers, that is, used for displaying images or collecting fingerprints. In other words, the screen assembly 20 can be used for fingerprint collection in addition to displaying images.
  • the filters on the color film substrate 203 are arranged corresponding to the liquid crystal cells so that the light transmitted through the liquid crystal is colored light. Then, the filters on the color film substrate 203 can be arranged according to the arrangement of the driving units on the driving circuit 205. cloth. In other words, the arrangement of the filters can reflect the arrangement of the drive units.
  • the light signal reflected by the finger passes through the cover 201, the upper polarizing layer 202, and the color filter substrate 203 to illuminate the sensor 221.
  • the sensor 221 converts the light signal projected to itself into an electrical signal, which is the original data of the fingerprint.
  • the sensor 221 may be arranged in the screen assembly 20. As shown in FIG. 2, the sensor 221 may be arranged between the liquid crystal layer 204 and the color filter substrate 203. In addition to the position shown in FIG. 2, the sensor 221 may also be arranged in other positions. As shown in FIG. 8, the sensor 221 may be arranged on the driving circuit 205, that is, on the same layer as the driving unit of the driving circuit 205.
  • the sensor 221 may also be arranged on the side of the screen assembly 20 close to the back cover, as shown in FIG. 9.
  • perforations are provided on the reflective film 210 and the substrate 211.
  • the sensor 221 is arranged between the liquid crystal layer 204 and the color filter substrate 203.
  • the area where the filter is arranged is a light-transmissive area, and the area where the filter is not arranged may be an opaque area.
  • the sensor 221 may be arranged in an opaque area.
  • FIGS. 4-7 The arrangement of the sensor 221 and the filter 2031 will be described below by taking FIGS. 4-7 as an example. The above arrangement can also be applied to the screen assembly 20 shown in FIG. 9. It is understandable that the embodiments shown in FIGS. 4-7 are only for helping those skilled in the art to better understand the technical solutions of the present application, and are not intended to limit the technical solutions of the present application. Benefiting from the guidance presented in the foregoing description and related drawings, those skilled in the art will think of many improvements and other embodiments of the present application. Therefore, it should be understood that the present application is not limited to the specific embodiments disclosed.
  • FIG. 4 is a schematic diagram of the arrangement of a filter 2031 and a sensor 221 according to an embodiment of the application.
  • the sensor 221 may be arranged under the filter 2031 so that the colored light formed through the filter 2031 can be irradiated on the sensor 221 after being reflected by the finger.
  • Figure 5 shows the circuit diagram for driving the sensor. Since the sensor 221 is arranged between the liquid crystal layer 204 and the color filter substrate 203, the sensor 221 needs a separate driving circuit for power supply.
  • the control module 30 can control the scanning lines on the circuit shown in FIG. 5 to be energized, so that the sensor 221 can detect the light signal reflected by the finger.
  • FIG. 6 is a schematic diagram of the arrangement of a filter 2031 and a sensor 221 according to an embodiment of the application.
  • the sensor 221 may be arranged between the two filters 2031, so that the colored light formed through the filter 2031 can be irradiated on the sensor 221 after being reflected by the finger.
  • the sensor 221 can receive light signals from two filters. Similar to the arrangement shown in FIG. 4, the sensor 221 needs a separate driving circuit to supply power. It should be understood that the sensor 221 may be powered by a circuit similar to that in FIG. 5, and details are not described herein again.
  • FIG. 7 is a schematic diagram of the arrangement of a filter 2031 and a sensor 221 according to an embodiment of the application.
  • the sensor 221 may be arranged under the three filters 2031, so that the colored light formed through the filters 2031 can be irradiated on the sensor 221 after being reflected by the finger. In other words, one sensor 221 can receive light signals from three filters 2031. Similar to the arrangement shown in FIG. 4, the sensor 221 needs a separate driving circuit to supply power. It should be understood that the sensor 221 may be powered by a circuit similar to that in FIG. 5, and details are not described herein again.
  • the driving circuit 205 may be driven by a driving chip.
  • the sensor 221 may be driven by a sensor chip.
  • the driving circuit 205 and the sensor 221 may be driven by one driving chip.
  • the sensor 221 can be arranged in the drive circuit 205, and the sensor 221 can share the drive circuit 205 with the drive unit. That is, the drive circuit 205 is used to drive the drive unit and the sensor 221. .
  • the control module 30 can activate the driving unit in the driving circuit 205 to trigger the driving signal, and the data of the comparison image corresponding to the user's fingerprint image can be transmitted to the processor.
  • the process of fingerprint collection because there are some driving units in the off state, there may be some sensors in the off state.
  • the area where the filter is provided is a light-transmissive area, and the area where the filter is not arranged may be a non-light-transmitting area.
  • the sensor 221 may be arranged in an opaque area.
  • FIGS. 10 and 11 the arrangement of the sensor 221 and the filter 2031 will be described by taking FIGS. 10 and 11 as examples. It can be understood that the embodiments shown in FIG. 10 and FIG. 11 are only for helping those skilled in the art to better understand the technical solutions of the present application, and are not intended to limit the technical solutions of the present application. Benefiting from the guidance presented in the foregoing description and related drawings, those skilled in the art will think of many improvements and other embodiments of the present application. Therefore, it should be understood that the present application is not limited to the specific embodiments disclosed.
  • FIG. 10 is a schematic diagram of the arrangement of a filter 2031 and a sensor 221 according to an embodiment of the application
  • FIG. 11 is a circuit diagram of the driving circuit 205.
  • the sensor 221 may be arranged under the filter 2031 so that the colored light formed through the filter 2031 can be irradiated on the sensor 221 after being reflected by the finger.
  • the control module 30 can control the scanning lines on the circuit shown in FIG. 11 to be energized, so that a part of the driving units are energized and drive the liquid crystal to transmit light, and the sensor 221 can detect the light signal reflected by the finger.
  • the driving circuit 205 may be driven by a driving chip.
  • FIGS. 12-15 shows a schematic diagram of the OLED screen assembly.
  • the screen assembly 600 may be a substitute for the screen assembly 20 in the electronic device 100 shown in FIG. 1.
  • the screen assembly 600 includes a cover plate 601, an optical glue 602, a polarizer 603, a touch layer 604, a light emitting layer 605, and a sensor 621.
  • encapsulation glass 606 encap glass
  • a light-absorbing layer 607 may also be included.
  • the light-absorbing layer can be composed of foam, copper foil and other materials. The above components are stacked.
  • the light-emitting layer 605 serves as a light source to provide light signals.
  • the light emitting layer 605 includes a plurality of organic light-emitting diodes (OLED). Changing the power state of the OLED can be used to display images.
  • the organic light emitting diode is a driving unit that can provide optical signals for fingerprint collection. In other words, the screen assembly 600 can be used for fingerprint collection in addition to displaying images.
  • the polarizer 603 is used to change the polarization characteristics of the optical signal.
  • the touch layer 604 is used to sense finger touches.
  • the cover plate 601 and the polarizer 603 can be bonded together by the optical glue 602, and have good light transmittance.
  • the light signal reflected by the finger passes through the cover 601, the optical glue 602, the polarizer 603, and the like to illuminate the sensor 621.
  • the sensor 621 converts the light signal projected to itself into an electrical signal, which is the original data of the fingerprint.
  • the sensor 621 may be arranged between the touch layer 604 and the light-emitting layer 605.
  • the sensor 621 and the touch layer 604 may be arranged on the same layer.
  • the sensor 621 may be arranged on the same layer as the light emitting layer 605.
  • the sensor 621 may also be arranged on the side of the screen assembly 600 close to the back cover, as shown in FIG. 15.
  • the screen assembly 600 can be connected to one of the communication interfaces of the control module 30, so that the control module 30 can activate the driving unit in the light-emitting layer 605 to trigger the driving signal, and the data of the comparison image corresponding to the user's fingerprint image can be transmitted to the processor .
  • the screen assembly 600 may include three driving circuits for driving the touch layer 604, the sensor 621, and the light-emitting layer 605, respectively.
  • the control module 30 can control a part of the light-emitting unit 623 of the light-emitting layer 605 (shown as a rectangle filled with diamonds in FIG. 12) to be powered on, and other light-emitting units 622 (shown as a rectangle filled with a dot matrix in FIG. 12) are not powered on to avoid Crosstalk occurs in the optical signal carrying fingerprint information.
  • the screen assembly 600 may include two driving circuits.
  • One driving circuit is used to drive the touch layer 604 and the sensor 621, and the other driving circuit is used to drive the light-emitting layer 605.
  • the touch layer 604 includes a touch circuit for supplying power to the touch unit 624 and the sensor 621
  • the light-emitting layer 605 includes a driving circuit for controlling the light-emitting unit to be energized (such as the light-emitting unit 623) or not (such as light-emitting).
  • Unit 622 The control module 30 can control a part of the light-emitting unit 623 of the light-emitting layer 605 (as shown in the rectangle filled with diamonds in FIG. 13) to be powered on, and other light-emitting units 622 (as shown in the rectangle filled with a dot matrix in FIG. 13) to be powered off to avoid Crosstalk occurs in the optical signal carrying fingerprint information.
  • the screen assembly 600 may include two driving circuits.
  • One driving circuit is used to drive the touch layer 604, and the other driving circuit is used to drive the light-emitting layer 605 and the sensor 621.
  • the touch layer 604 includes a touch circuit for supplying power to the touch unit 624
  • the light-emitting layer 605 includes a driving circuit for controlling the light-emitting unit to be energized (for example, the light-emitting unit 623) or not, and to supply power to the sensor 621 .
  • the control module 30 can control a part of the light-emitting units 623 of the light-emitting layer 605 (shown as a rectangle filled with diamonds in FIG. 14) to be powered on, and other light-emitting units are not powered on, so as to avoid crosstalk of the optical signal carrying fingerprint information.
  • the screen assembly 600 may include three driving circuits for driving the touch layer 604, the sensor 621, and the light-emitting layer 605, respectively.
  • the control module 30 can control a part of the light-emitting unit 623 of the light-emitting layer 605 (shown as a rectangle filled with diamonds in FIG. 12) to be powered on, and other light-emitting units 622 (shown as a rectangle filled with a dot matrix in FIG. 12) are not powered on to avoid Crosstalk occurs in the optical signal carrying fingerprint information.
  • the touch layer 604, the light-emitting layer 605, and the sensor 621 may be driven by one or more chips.
  • the devices that use optical signals to collect fingerprint image information as shown in Figures 2, 8, 9, 12-15, there may also be devices that use electric field signals and ultrasonic signals to collect fingerprint images.
  • the fingerprint image is collected by transmitting electric field signals (or ultrasonic signals) to the finger and receiving electric field signals (or ultrasonic signals) interacting with the finger.
  • the light may not enter the screen assembly vertically after the light signal is reflected by the finger, as shown in Figure 16. Therefore, the light with fingerprint information will be refracted when passing through the transparent layer such as cover plate, polarizer, color film substrate.
  • the transparent layer such as cover plate, polarizer, color film substrate.
  • the rectangle 134 filled with diagonal lines in FIG. 26 represents the activated driving unit, and the activated driving unit drives the liquid crystal whose driving area is A, that is, the transparent area is A.
  • the light signal reflected by the finger illuminates the sensor to form several light spots (as shown by light spots 136 in FIG. 26), and the total area of the light spots is greater than A. In other words, the light signal is diffused after passing through a number of light-transmitting layers.
  • the shape after step 131 in FIG. 26 is a schematic diagram of the diffused light spot.
  • the light transmitted by the two liquid crystal cells with small spacing can form two overlapping light spots on the sensor after being reflected by the finger.
  • the overlapping part of the two light spots carries two different fingerprint pattern information, thereby forming crosstalk , Is not conducive to the collection of fingerprint information.
  • the absence of crosstalk may mean that the degree of crosstalk is extremely small, for example, it may be that the degree of crosstalk is less than a certain threshold.
  • this application also provides a fingerprint collection method. Control the spacing of the drive signal sources by controlling the open and open states of multiple drive units, that is, control a part of the drive unit to start and another part of the drive unit to close, thereby increasing the spacing between the drive signals, avoiding crosstalk between the drive signals, and then Improve the accuracy of collecting fingerprint images.
  • FIG. 17 is a schematic flowchart of a fingerprint collection method provided by an embodiment of this application. This method can be applied to the electronic device 100 described above.
  • FIG. 18 is a schematic diagram of fingerprint collection in which the electronic device 100 executes the method shown in FIG. 17.
  • the control module 510 determines a first driving unit group from N driving units 520, the first driving unit group includes n driving units, where n is a positive integer greater than 1 and less than N, and any of the n driving units The distance between the two driving units is greater than the preset threshold; 402, the control module 510 activates the driving units in the first driving unit group, and turns off the driving units in the N driving units 520 except the first driving unit group; 403, The control module 510 generates a fingerprint image according to the first fingerprint signal sent by the sensor 530.
  • control module 510 in FIG. 18 may be the control module 30 shown in FIG. 1.
  • N driving units 520 in FIG. 18 may be the driving units arranged in the driving circuit 205 shown in FIGS. 2, 8 and 9, or may be arranged in the light-emitting circuit shown in FIGS. 12-15.
  • the senor 530 in FIG. 18 may be the sensor 221 as shown in FIGS. 2, 8 and 9 or the sensor 621 as shown in FIGS. 12-15.
  • One driving unit can be one or more TFTs.
  • the filter corresponding to TFT1 is a red filter
  • the filter corresponding to TFT2 is a green filter
  • the filter corresponding to TFT3 is a blue filter.
  • Driving a driving unit can be driving the liquid crystal corresponding to the red filter, and Do not drive the liquid crystals corresponding to the green and blue filters; driving one drive unit can drive the liquid crystals corresponding to the red, green, and blue filters, which will correspond to the red, green, and blue filters.
  • Each TFT is regarded as a driving unit.
  • One driving unit can be one or more OLEDs.
  • the distance between any two adjacent driving units in the N driving units 520 is less than the preset threshold. Then, if two adjacent driving units are activated at the same time, two overlapping light spots will be formed on the sensor 530.
  • the arrangement of the N driving units 520 makes the driving signals triggered by two adjacent driving units interact with the finger and cause crosstalk with each other. Therefore, if two non-adjacent driving units with a distance greater than a predetermined threshold are activated among the N driving units 520, two overlapping light spots will not be formed on the sensor 530, thereby avoiding the problem of fingerprint signal crosstalk.
  • the distance between two driving units may refer to the distance between the center points of the two driving units.
  • the preset threshold may refer to the minimum distance between the two driving units under the condition that no crosstalk occurs in the driving signals triggered by the two driving units.
  • the control module 510 can control the scanning lines on the driving circuit as shown in FIG. 3 to be energized, so that the driving unit 2051 can drive the liquid crystal to transmit light. For example, in the first driving frame, the scan lines of odd rows and odd columns are energized, and the scan lines of even rows and even columns are not energized, so that the distance between any two driving units in the energized state is greater than a preset threshold.
  • N driving units 520 may be arranged in any form such as a row, a column, an array, etc., which is not limited in this application.
  • FIGS. 19-25 are schematic diagrams of the first driving unit group among N driving units 520. Wherein, the rectangle represents the drive unit in the N drive units 520, and the rectangle filled with diagonal lines represents the drive unit in the first drive unit group. It is understandable that the embodiments shown in FIGS. 19-25 are only used to help those skilled in the art to better understand the technical solutions of the present application, and are not intended to limit the technical solutions of the present application. Benefiting from the guidance presented in the foregoing description and related drawings, those skilled in the art will think of many improvements and other embodiments of the present application. Therefore, it should be understood that the present application is not limited to the specific embodiments disclosed.
  • N driving units 520 are arranged in a row, wherein any two driving units in the first driving unit group are separated by one or more columns. One or more drive units are spaced between any two drive units in the first drive unit group.
  • the driving unit array shown in FIG. 20 can be derived.
  • the driving unit array shown in FIG. 20 may include a plurality of driving unit groups, and the driving units in each driving unit group are arranged in rows.
  • the distance a1 between two adjacent driving unit groups may be greater than a preset threshold.
  • the driving unit group includes N driving units 520, and the distance b1 between any two adjacent driving units in the N driving units 520 is less than a preset threshold, but 2b1 is greater than Preset threshold.
  • the N driving units 520 include a first driving unit group.
  • N driving units 520 are arranged in a column, wherein any two driving units in the first driving unit group are spaced one or more rows apart. One or more drive units are spaced between any two drive units in the first drive unit group.
  • the driving unit array shown in FIG. 22 can be derived.
  • the driving unit array shown in FIG. 22 may include a plurality of driving unit groups, and the driving units in each driving unit group are arranged in columns.
  • the distance a2 between two adjacent driving unit groups may be greater than a preset threshold.
  • the any driving unit group includes N driving units 520, and the distance b2 between any two adjacent driving units in the N driving units 520 is less than a preset threshold, but 2b2 is greater than Preset threshold.
  • the N driving units 520 include a first driving unit group.
  • the driving unit array shown in FIG. 23 can be derived.
  • the driving unit array shown in FIG. 23 may include a plurality of driving unit groups arranged in rows, and the driving units in each driving unit group are arranged in columns.
  • the distance between two adjacent drive unit groups may be less than a preset threshold.
  • the any driving unit group includes N driving units 520, and the distance between any two adjacent driving units in the N driving units 520 is smaller than a preset threshold.
  • the N driving units 520 include a first driving unit group. It should be understood that the drive unit array shown in FIG. 23 can also be understood as including a plurality of drive unit groups arranged in columns, and the drive units in each drive unit group are arranged in rows.
  • the N driving units 520 are arranged in a straight line obliquely 45°, wherein any two driving units in the first driving unit group are separated by at least one row, and any two driving units are separated by at least one column. One or more drive units are spaced between any two drive units in the first drive unit group.
  • the drive unit array shown in FIG. 25 may include multiple drive unit groups, and the drive units in each drive unit group are arranged in a straight line obliquely 45°.
  • the any driving unit group includes N driving units 520, and the N driving units 520 include the first driving unit group.
  • the control module 510 can activate a group of driving units in each driving frame, for example, activate the first driving unit group in the first driving frame, and shut down other driving unit groups such as the second driving unit group.
  • Drive unit group ; start the second drive unit group in the second drive frame, and close other drive unit groups such as the first drive unit group.
  • the distance between any two drive units in each group of drive units is greater than a preset threshold. The arrangement position of the driving units with a large distance apart makes the driving signals triggered by the driving units with a large distance interact with the finger without crosstalk.
  • control module 510 may activate the driving units of odd rows and turn off the driving units of even rows in the first driving frame, and activate the driving units of even rows and turn off the driving units of odd rows in the second driving frame.
  • control module 510 may activate the driving units of the odd columns and turn off the driving units of the even columns in the first driving frame, and activate the driving units of the even columns and turn off the driving units of the odd columns in the second driving frame.
  • step 131 the control module 510 activates the first driving unit group 134 in the first driving frame, and turns off other driving units 135 except the first driving unit group 134, so that the first driving unit group 134
  • the driven liquid crystal cell can transmit light, while the liquid crystal cell driven by the other driving unit 135 does not transmit light.
  • the light signal diffuses after being reflected by the finger, and the sensor 530 receives several light spots 136. Although the light signal is diffused, there is no crosstalk between the light spots and each light spot can be processed separately.
  • the sensor 530 receives the light signal driven by the first driving unit group 134 and reflected by the finger, and sends the information carrying the fingerprint pattern to the control module 510.
  • the control module 510 can process each light spot, remove the dispersion effect, and obtain the fingerprint image block 137 corresponding to the first driving unit group. Performing the diffusion radius limitation processing on the light spot received by the sensor 530 can make the area of the fingerprint image block the same as or similar to the light transmission area realized by a single driving unit, which lays a foundation for subsequent processing.
  • the fingerprint information carried in the area corresponding to the drive unit in the light spot may be retained, and fingerprint information in other areas in the light spot may be discarded.
  • the embodiment of the present application provides a method for limiting the dispersion radius. It should be understood that in addition to the methods provided in the embodiments of the present application, there are other methods for limiting the dispersion radius, which are not described in the embodiments of the present application.
  • the excitation function H(f x , f y ) satisfies:
  • B′(f x ,f y ) is a function representing the signal output by the sensor 530
  • A′(f x ,f y ) is a function representing the signal output by a driving unit
  • f x represents the abscissa
  • f y represents the ordinate.
  • the driving signal triggered by a driving unit satisfies the function a(x, y).
  • the driving signal interacts with the finger with known pattern information and then is detected by the sensor 530.
  • the signal output by the sensor 530 uses the function b(x ,y) means.
  • x represents the abscissa of the airspace
  • y represents the ordinate of the airspace.
  • the excitation function h(x,y) satisfies:
  • the spatial domain functions a(x,y), b(x,y), h(x,y) are transformed into frequency domain functions B′(f x ,f y ), A′(f x , f y ), H(f x ,f y ).
  • B′(f x ,f y ) is a function representing the signal output by the sensor 530
  • A′(f x ,f y ) is a function representing the signal output by a driving unit
  • f x represents the abscissa of the frequency domain
  • f y represents the ordinate of the frequency domain.
  • the excitation function H(f x , f y ) can be obtained by triggering a driving signal by multiple driving units.
  • the fingerprint image satisfies:
  • B (f x , f y ) is a function representing the signal output by the sensor 530
  • a (f x , f y ) is a function representing the signal output by one drive unit in the first drive unit group Function
  • comb(P x ,f x ) ⁇ comb(P y ,f y ) is the array function of the first drive unit group
  • R(f x ,f y ) is the function representing the fingerprint image
  • H( f x , f y ) are excitation functions
  • P x represents the period of the drive units in the first drive unit group being arranged in rows
  • P y represents the period of the drive units in the first drive unit group being arranged on the columns Period
  • f x represents the abscissa
  • f y represents the ordinate.
  • the driving signal triggered by the first driving unit group can be expressed as: Among them, a(x,y) is a function representing the driving signal triggered by a driving unit in the airspace; comb(x/P x ) ⁇ comb(y/P y ) is the first driving unit group in the airspace The array function.
  • P x is the period during which the drive units in the first drive unit group are arranged in rows
  • P y is the period during which the drive units in the first drive unit group are arranged in columns.
  • x represents the abscissa of the airspace
  • y represents the ordinate of the airspace.
  • the driving signal triggered by the first driving unit group is detected by the sensor 530 after interacting with a finger whose texture information is unknown, and the signal output by the sensor 530 is represented by a function b(x, y). Then, the function r(x,y) representing the fingerprint image satisfies:
  • the spatial functions a(x,y), b(x,y), comb(x/P x ) ⁇ comb(y/P y ), r(x,y), h(x,y) ) Were transformed into frequency domain functions B(f x ,f y ), A(f x ,f y ), comb(P x ,f x ) omb(P y ,f y ), R(f x ,f y) ), H(f x ,f y ).
  • B (f x , f y ) is a function representing the signal output by the sensor 530
  • a (f x , f y ) is a function representing the signal output by a driving unit
  • H (f x , f y ) is Excitation function
  • f x represents the abscissa of the frequency domain
  • f y represents the ordinate of the frequency domain.
  • Step 133 The control module 510 activates the second driving unit group in the second driving frame and turns off other driving units except the second driving unit group; the sensor 530 receives the light signal driven by the second driving unit group and reflected by the finger, And send the information carrying the fingerprint lines to the control module 510.
  • the control module 510 can process each light spot, remove the dispersion effect, and obtain the fingerprint image block corresponding to the second drive unit group; the control module 510 can compare the fingerprint image block corresponding to the first drive unit group and the fingerprint image block corresponding to the second drive unit group.
  • the corresponding fingerprint image blocks are synthesized together to obtain a high-precision fingerprint image 138.
  • the N driving units 520 are grouped, and different driving unit groups are driven in different driving frames to obtain fingerprint image blocks in time-sharing; then, the fingerprint image blocks corresponding to multiple groups of driving unit groups are synthesized to obtain the same The fingerprint image block corresponding to the driving unit 520. Therefore, crosstalk can be avoided without missing fingerprint information, and high-precision, high-definition fingerprint images can be obtained.
  • the N driving units 520 form an N1 ⁇ N2 driving unit array, and N1 and N2 are positive integers greater than 1.
  • the control module 510 determines a first driving unit group from N driving units 520, and the first driving unit group is composed of driving units located in odd rows in the N1 row and odd columns in the N2 column. In the first driving frame, the control module 510 activates the driving units in the first driving unit group, and turns off the driving units in the N driving units 520 except the first driving unit group.
  • the sensor 530 detects the driving signal triggered by the first driving unit group and interacting with the fingerprint lines, and sends the first fingerprint signal to the control module 510.
  • the control module 510 determines a second driving unit group from N driving units 520, and the second driving unit group is composed of driving units located in odd rows in the N1 row and even columns in the N2 column. In the second driving frame, the control module 510 activates the driving units in the second driving unit group, and turns off the driving units in the N driving units 520 except the second driving unit group.
  • the sensor 530 detects the driving signal triggered by the second driving unit group and interacting with the fingerprint lines, and sends a second fingerprint signal to the control module 510.
  • the control module 510 determines a third driving unit group from N driving units 520, and the third driving unit group is composed of driving units located in even rows in the N1 row and odd columns in the N2 column.
  • the control module 510 activates the driving units in the third driving unit group, and turns off the driving units in the N driving units 520 except the third driving unit group.
  • the sensor 530 detects the driving signal triggered by the third driving unit group and interacting with the fingerprint lines, and sends a third fingerprint signal to the control module 510.
  • the control module 510 determines a fourth driving unit group from the N driving units 520, and the fourth driving unit group is composed of driving units located in even rows in the N1 row and even columns in the N2 column.
  • the control module 510 activates the driving units in the fourth driving unit group, and turns off the driving units in the N driving units 520 except the fourth driving unit group.
  • the sensor 530 detects the driving signal triggered by the fourth driving unit group and interacting with the fingerprint lines, and sends the fourth fingerprint signal to the control module 510.
  • Step 132
  • the control module 510 generates a first fingerprint image according to the first fingerprint signal sent by the sensor 530, and the first fingerprint image includes image blocks corresponding to the driving units in the first driving unit group.
  • the control module 510 generates a second fingerprint image according to the second fingerprint signal sent by the sensor 530.
  • the second fingerprint image includes image blocks corresponding to the driving units in the second driving unit group.
  • the control module 510 generates a third fingerprint image according to the third fingerprint signal sent by the sensor 530, and the third fingerprint image includes image blocks corresponding to the driving units in the third driving unit group.
  • the control module 510 generates a fourth fingerprint image according to the fourth fingerprint signal sent by the sensor 530.
  • the fourth fingerprint image includes image blocks corresponding to the driving units in the fourth driving unit group.
  • Step 133
  • the control module 510 combines the image blocks in the first fingerprint image, the image blocks in the second fingerprint image, the image blocks in the third fingerprint image, and the image blocks in the fourth fingerprint image to generate the fingerprint image.
  • the drive signal triggered in each drive frame will not crosstalk after interacting with the finger; the fingerprint images of different drive frames obtained are synthesized to obtain high-precision fingerprint images and improve fingerprints. The clarity of the image.
  • the fingerprint images of multiple driving frames can be acquired in the above manner, which increases the flexibility of the fingerprint identification matching process.
  • the control module 510 activates 4 driving unit groups within 4 driving frames to trigger 4 driving signals, and at least 15 fingerprint images can be acquired for fingerprint identification matching.
  • the control module 510 can perform fingerprint matching on multiple low-precision fingerprint images with high-precision fingerprint images, and the control module 510 can implement more forms of fingerprint matching processes.
  • the control module in the embodiment of the application may be a central processing unit (CPU), a general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices , Transistor logic devices, hardware components or any combination thereof. It can implement or execute various exemplary logical blocks, modules and circuits described in conjunction with the disclosure of this application.
  • the control module may also be a combination of computing functions, for example, a combination of one or more microprocessors, a combination of a DSP and a microprocessor, and so on.
  • the disclosed system, device, and method may be implemented in other ways.
  • the device embodiments described above are only illustrative.
  • the division of the units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components can be combined or It 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 be in electrical, mechanical or other forms.
  • 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, that is, they may be located in one place, or they 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 of the embodiments.
  • each unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.
  • the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium.
  • the technical solution of this application essentially or the part that contributes to the existing technology or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the method described in each embodiment of the present application.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory (read-only memory, ROM), random access memory (random access memory, RAM), magnetic disk or optical disk and other media that can store program code .

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Abstract

L'invention concerne un procédé de collecte d'empreintes digitales et un dispositif électronique, ledit procédé comprenant les étapes suivantes : un module de commande détermine un premier ensemble d'unités d'entraînement à partir de n unités d'entraînement, le premier ensemble d'unités d'entraînement comprenant n unités d'entraînement (401), n étant un nombre entier positif supérieur à 1 et inférieur à N, la distance entre deux quelconques des n unités d'entraînement étant supérieure à une valeur seuil prédéfinie ; le module de commande active les unités d'entraînement du premier ensemble d'unités d'entraînement, et ferme les unités d'entraînement des n unités d'entraînement autres que le premier ensemble d'unités d'entraînement (402) ; en fonction d'un premier signal d'empreintes digitales envoyé par un capteur, le module de commande génère une image d'empreintes digitales (403). Le procédé ne nécessite pas de composants auxiliaires et peut améliorer la précision de collecte d'informations de motif d'empreintes digitales.
PCT/CN2020/076614 2019-04-16 2020-02-25 Procédé de collecte d'empreintes digitales et dispositif électronique WO2020211536A1 (fr)

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Citations (4)

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Publication number Priority date Publication date Assignee Title
CN106886341A (zh) * 2017-03-28 2017-06-23 京东方科技集团股份有限公司 显示基板及显示装置
CN107122742A (zh) * 2017-04-27 2017-09-01 上海天马微电子有限公司 一种显示装置及其指纹识别方法、以及电子设备
CN107230698A (zh) * 2017-05-27 2017-10-03 上海天马微电子有限公司 一种显示面板及显示装置
CN108256396A (zh) * 2016-12-28 2018-07-06 南昌欧菲生物识别技术有限公司 触控显示屏及电子装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108256396A (zh) * 2016-12-28 2018-07-06 南昌欧菲生物识别技术有限公司 触控显示屏及电子装置
CN106886341A (zh) * 2017-03-28 2017-06-23 京东方科技集团股份有限公司 显示基板及显示装置
CN107122742A (zh) * 2017-04-27 2017-09-01 上海天马微电子有限公司 一种显示装置及其指纹识别方法、以及电子设备
CN107230698A (zh) * 2017-05-27 2017-10-03 上海天马微电子有限公司 一种显示面板及显示装置

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