WO2018081981A1 - Dispositif électronique et puce de reconnaissance biologique - Google Patents

Dispositif électronique et puce de reconnaissance biologique Download PDF

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Publication number
WO2018081981A1
WO2018081981A1 PCT/CN2016/104456 CN2016104456W WO2018081981A1 WO 2018081981 A1 WO2018081981 A1 WO 2018081981A1 CN 2016104456 W CN2016104456 W CN 2016104456W WO 2018081981 A1 WO2018081981 A1 WO 2018081981A1
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WO
WIPO (PCT)
Prior art keywords
display module
biometric
biometric device
disposed
target object
Prior art date
Application number
PCT/CN2016/104456
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English (en)
Chinese (zh)
Inventor
李问杰
Original Assignee
深圳信炜科技有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 深圳信炜科技有限公司 filed Critical 深圳信炜科技有限公司
Priority to CN201690000161.3U priority Critical patent/CN206757648U/zh
Priority to PCT/CN2016/104456 priority patent/WO2018081981A1/fr
Publication of WO2018081981A1 publication Critical patent/WO2018081981A1/fr

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Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F18/00—Pattern recognition

Definitions

  • the present invention relates to the field of biometric identification, and in particular, to a biometric identification device and an electronic device.
  • the principle of the optical fingerprint recognition module mainly utilizes the reflection of light on the surface of the glass cover to identify the valley information of the fingerprint, because the finger presses on the glass cover, the ridge of the fingerprint and the glass cover. Contact, and the valley of the fingerprint does not have a glass cover, so that the reflected light of the valley and the ridge of the fingerprint is greatly different, and the reflected light is collected to realize the fingerprint collection.
  • the optical fingerprint recognition module is mainly divided into two types, one of which is a fingerprint recognition module commonly used for access control, and the other is a fingerprint recognition module that uses a surface light source.
  • the light bulb is usually used to emit light
  • the camera is used with the optical system to receive the light reflected by the finger, thereby realizing fingerprint collection.
  • the camera and optical system are usually far from the glass cover.
  • the thickness of the electronic device is thick, which is disadvantageous for the electronic device to develop toward lightness and thinness.
  • the accuracy of capturing a fingerprint image formed by a surface light source and reflected by a finger will be affected by the thickness of the glass cover, as the thickness of the glass increases, due to scattering of light. The accuracy of the captured fingerprint image will decrease.
  • the fingerprint sensing accuracy of the fingerprint recognition module is insufficient due to the thick front cover.
  • embodiments of the present invention aim to at least solve one of the technical problems existing in the prior art. To this end, embodiments of the present invention are required to provide a biometric device and an electronic device.
  • a biometric device includes: a plurality of point light sources, a touch screen, a controller, a plurality of photosensitive elements, and a processing circuit.
  • the touch screen is configured to determine a contact area of the target object on the biometric device;
  • the controller is configured to control a plurality of the point light sources corresponding to the contact area Illuminating to emit an optical signal to the target object;
  • a plurality of photosensitive elements for receiving an optical signal reflected by the target object, and converting the received optical signal into a corresponding electrical signal; processing circuitry for An electrical signal is used to determine biometric information of the target object.
  • the biometric device since the biometric device illuminates a plurality of point light sources corresponding to the contact area of the target object, the single point illumination may be selected when scanning the target object, and the predetermined time may be selected.
  • a few point sources spaced far enough apart emit light, and accordingly, the light reflected by the target object interacts with each other sufficiently small; in addition, the light can be collected by the photosensitive element by the principle of specular reflection, and the area of the photosensitive element passing through the reflected light collecting area and the thickness of the medium Irrelevant, thereby improving the image accuracy of the acquisition target object.
  • the biometric device includes a display module, the display module is configured to emit light and perform image display, and the display module includes a plurality of pixel points, and the plurality of pixel points A region for the plurality of point light sources, or each of the pixel points, is used to form the point light source, respectively.
  • the plurality of pixel points are self-illuminating point light sources, or the display module further includes a backlight, the backlight is a surface light source, and the controller passes through the control center. Describe a plurality of pixel points to correspondingly control whether light from the backlight is emitted from the plurality of pixel points, and each of the pixels corresponds to a region of the backlight to form one of the point light sources.
  • the display module when the plurality of pixel points are self-illuminating point light sources, the display module is an organic light emitting diode display module; and when the display module includes a backlight, the The display module is a liquid crystal display module.
  • the touch screen includes a touch sensing layer and a touch detection circuit, and the touch detection circuit is configured to drive a touch sensing layer to perform touch sensing to determine the contact area, wherein the touch sensing The layer is disposed above the display module or inside the display module.
  • the display module includes an opposite first substrate and a second substrate, the first substrate includes a first surface facing the second substrate, and the second substrate includes an orientation a second surface of the first substrate, the plurality of pixel points being disposed between the first substrate and the second substrate, each of the pixel points including a control gate, a pixel electrode, and a common electrode.
  • the plurality of photosensitive elements, the control of the plurality of pixel points, and the pixel electrode are both disposed on the first surface.
  • the display module further includes a black matrix layer in a grid shape, the sense The light element is disposed within a mesh region of the black matrix layer and is configured to receive an optical signal reflected by the target object of the mesh region.
  • the black matrix layer is disposed on the second surface.
  • the display module further includes a color filter layer, the color filter layer is formed in a mesh area of the black matrix layer, and the photosensitive element is configured to receive through the An optical signal reflected by the target object of the color filter layer.
  • the plurality of pixel points are self-illuminating color point sources.
  • control of the plurality of pixel points and the pixel electrode are both disposed on the first surface, and the plurality of photosensitive elements are disposed on the second surface on.
  • the display module further includes a black matrix layer, the black matrix layer is disposed on the second surface, and the black matrix layer is provided with a pupil, the pupil Storing the photosensitive element and enabling the photosensitive element to receive an optical signal reflected by the target object.
  • the photosensitive element comprises one or more of a thin film transistor, a complementary metal oxide semiconductor transistor, and a charge coupled device.
  • the plurality of photosensitive elements are arranged in an array.
  • each photosensitive element is disposed corresponding to a point of light source, or a photosensitive element is disposed corresponding to a region where each point source is located.
  • the biometric device further includes a plurality of first scan lines and a plurality of first data lines, and the plurality of first scan lines are insulated from the plurality of first data lines
  • the plurality of photosensitive elements are phototransistors, wherein a gate of the phototransistor is connected to the first scan line, a source of the phototransistor is connected to the first data line, and a drain of the phototransistor is connected to the processing circuit.
  • the biometric device further includes a first driving circuit coupled to the plurality of first scan lines and the plurality of first data lines for providing by the first scan line
  • the first scan signal is applied to the gate of the phototransistor to activate the phototransistor
  • the first drive circuit further supplies a drive signal to the source of the activated phototransistor through the first data line.
  • the first driving circuit is further connected to the controller, and when the biometric information sensing is performed, the first driving circuit is used to drive the multiple under the control of the controller.
  • One photosensitive element works.
  • the control is turned off by a transistor
  • the display module further includes a plurality of second scan lines and a plurality of second data lines, and the plurality of second scan lines are The plurality of second data lines are insulated and disposed, wherein the second scan line is connected to a gate of the transistor, and the second data line is connected to a source of the transistor.
  • the transistor is connected to the pixel electrode.
  • the plurality of first scan lines are disposed in parallel with the plurality of second scan lines, and the plurality of first data lines are disposed in parallel with the plurality of second data lines.
  • the transistor is turned off and the phototransistor is respectively disposed at an insulation intersection of each of the second scan line and the second data line.
  • the biometric device further includes a second driving circuit respectively connected to the second scan line and the second data line, and further connected to the controller, the controller Driving the point source by controlling the second driving circuit, the second driving circuit is configured to provide a second scan signal to the gate of the transistor through the second scan line to activate the transistor, the second The driving circuit further supplies a driving signal to the pixel electrode through the second data line and the source of the activated transistor to cause the pixel to be illuminated.
  • the transistor is turned off and the phototransistor is a thin film transistor, and the process of the transistor is the same as the process of the phototransistor.
  • the controller in controlling the point light source to illuminate, is configured to control a plurality of the point light sources corresponding to the contact area to sequentially illuminate, or a predetermined distance Several of the point sources are lit at the same time.
  • the biometric information includes fingerprint information, and a horizontal precision of the fingerprint image formed by the fingerprint information is half of a horizontal width of the pixel, and a vertical precision of the fingerprint image Is half the vertical width of the pixel.
  • the display module displays an image
  • the controller is further configured to control the display module outside the contact area.
  • the other areas continue to display images.
  • the controller when the display module is in an off-screen state, when the biometric information sensing is performed, the controller is configured to control the display module outside the contact area. The rest of the area continues to be off.
  • the plurality of photosensitive elements are disposed in the display module.
  • the biometric device comprises or is integrated as a biometric chip.
  • the biometric information includes any one or more of fingerprint information, palm print information, and ear print information.
  • the biometric device is a fingerprint recognition device.
  • An electronic device includes the biometric device according to any of the above embodiments.
  • the electronic device includes the biometric device, correspondingly, the electronic device can have the following three main advantages.
  • the thickness of the biometric device is thinner than that of the fingerprint recognition module using the camera, so that the thickness of the electronic device having the biometric device is thin, and does not affect the development of the electronic device in the direction of lightness and thinning;
  • the sensing accuracy of the biometric device is less affected by the thickness of the glass cover plate, and therefore, the sensing accuracy of the biometric device after the biometric device is placed under the protective cover of the electronic device Less affected, thereby improving the user experience of the electronic device;
  • the portion of the biometric device for image acquisition may be disposed in the display module of the display device, thereby enabling the electronic device to perform biometric information collection on the full screen, thereby further improving the user.
  • the biometric device can realize the point light source and the like by using some existing components in the display module, thereby saving materials, reducing the overall cost of the electronic device, and making the electronic device relatively thin and light.
  • the image capturing portion of the biometric device may be integrated into a biometric chip, correspondingly disposed at a suitable position on the front, the back, and the side of the electronic device, and the outer surface of the electronic device may be exposed. It can also be placed inside the electronic device, adjacent to the housing.
  • the collecting portion of the biometric information of the biometric device may be disposed in the display module, thereby implementing biometric information sensing in full screen.
  • FIG. 1 is a schematic block diagram of a biometric identification device according to an embodiment of the present invention.
  • FIG. 2 is a schematic diagram of a biometric device performing biometric information sensing in accordance with an embodiment of the present invention
  • FIG. 3 is a schematic diagram showing the principle of receiving a reflected light signal by a photosensitive element of the biometric device according to an embodiment of the present invention
  • FIG. 4 is a schematic structural diagram of a display module of a biometric device according to an embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of a biometric identification device according to an embodiment of the present invention.
  • FIG. 6 is a schematic plan view of a display module of a biometric device according to an embodiment of the present invention.
  • FIG. 7 is a partial structural schematic view of a display module of a biometric device according to an embodiment of the present invention.
  • FIG. 8 is another schematic plan view of a display module of the biometric device according to an embodiment of the present invention.
  • FIG. 9 is a schematic structural diagram of another part of a display module of a biometric device according to an embodiment of the present invention.
  • FIG. 10 is a schematic view showing a distribution of photosensitive elements of a biometric device according to an embodiment of the present invention.
  • FIG. 11 is a schematic view showing the distribution of a point light source corresponding to a contact area of the biometric device according to the embodiment of the present invention.
  • FIG. 12 is another schematic diagram of a distribution of point light sources corresponding to a contact area of the biometric device according to an embodiment of the present invention.
  • FIG. 13 is a schematic plan view of an electronic device according to an embodiment of the present invention.
  • it may be a fixed connection, It can be a detachable connection, or can be connected integrally; it can be a mechanical connection, it can be an electrical connection or it can communicate with each other; it can be directly connected, or it can be connected indirectly through an intermediate medium, it can be the internal connection of two elements or two The interaction of components.
  • a fixed connection It can be a detachable connection, or can be connected integrally; it can be a mechanical connection, it can be an electrical connection or it can communicate with each other; it can be directly connected, or it can be connected indirectly through an intermediate medium, it can be the internal connection of two elements or two The interaction of components.
  • a biometric device 100 includes a plurality of point light sources 102, a touch screen 104, a controller 106, a plurality of photosensitive elements 108, a processing circuit 110, and a first The drive circuit 111 and the second drive circuit 113.
  • the touch screen 104 is used to determine the contact area 112 of the target object 200 on the biometric device 100. Controller
  • the 106 is used to control a plurality of point light sources 102 corresponding to the contact area 112 to illuminate to emit an optical signal to the target object.
  • the first driving circuit 111 is used to drive the plurality of photosensitive elements 108 to operate under the control of the controller 106.
  • a plurality of photosensitive elements 108 are used to receive the optical signals reflected by the target object 200 and convert the received optical signals into corresponding electrical signals.
  • the processing circuit 110 is configured to determine biometric information of the target object 200 based on the electrical signal.
  • the controller 106 correspondingly controls a plurality of point light sources 102 corresponding to the contact area 112 by controlling the second driving circuit 113, for example. Lights up to emit a light signal to the target object.
  • the biometric device 100 since the biometric device 100 illuminates a plurality of point light sources 102 corresponding to the contact area of the target object 200, the single point illumination can be selected when scanning the target object 200. Alternatively, several point light sources 102 spaced far enough apart may be selected to emit light. Accordingly, the light reflected by the target object 200 interacts with each other sufficiently small; in addition, light may be collected by the photosensitive element 108 by the principle of specular reflection, and the photosensitive element 108 The image accuracy of the acquisition target object 200 is improved by the area of the reflected light collection region regardless of the thickness of the medium. At the same time, the bifurcated point source 102 can form a complete image information of the target object 200.
  • the biometric device 100 may include or be integrated as a biometric chip for receiving contact or proximity of the target object 200 to sense image information of the target object 200.
  • the present application is not limited thereto.
  • a portion of the biometric device 100 for acquiring an image may also be formed in a display module of the display device, and the display module is configured to receive a user's The finger contacts or approaches to sense image information of the target object 200, thereby enabling the display device to perform biometric information sensing in full screen, thereby improving the user experience, and also facilitating the biometric device 100.
  • Electronic devices are moving toward thinner and lighter.
  • the biometric information includes, for example, any one or more of non-limited fingerprint information, palm print information, and ear print information.
  • the biometric device is, for example, a fingerprint recognition device, or a fingerprint recognition device in combination with a blood oxygen recognition device or the like.
  • the plurality of point light sources 102 are arranged in an array, and the plurality of photosensitive elements 108 are also arranged in an array.
  • the plurality of point light sources 102 may be arranged in other regular or irregular manners, and the plurality of photosensitive elements 108 may also be arranged in other regular or irregular manners.
  • each photosensitive member 108 is disposed corresponding to a point light source 102 to achieve a better receiving effect.
  • the arrowed line in FIG. 3 indicates light, and the thickness of the first medium 300 on the left side of the figure is smaller than the thickness of the second medium 302 on the right side of the figure, and the photosensitive element 108 is opposite.
  • the collection area of the reflected light of the first target object 304 (for example, a finger) on the first medium 300 is the same as the collection area of the reflected light of the second target object 306 (for example, a finger) on the second medium 302, thereby ensuring the collection of the target object. Image accuracy of 200.
  • the first medium 300 and the second medium 302 may be protective covers of the biometric device 100 . It should be noted that FIG.
  • FIG. 3 only schematically illustrates the optical path of the biometric information sensing device, the positional relationship between the photosensitive element 108 and the point light source 102, and is not limited to the positional relationship shown in FIG. 3.
  • the photosensitive element 108 and the point light source 102 The positional relationship can be referred to the introduction of the embodiment of the present invention.
  • the photosensitive element 108 facing the valley of the fingerprint mainly receives the light reflected from the mirror surface of the protective cover
  • the photosensitive element 108 facing the ridge of the fingerprint mainly receives the light reflected back from the ridge of the fingerprint.
  • the specularly reflected light is much stronger than the diffusely reflected light, and thus, the photosensitive element 108 determines the position of the valley of the fingerprint according to the line reflected from the mirror surface of the protective cover, for example, by exclusive, the ridge of the fingerprint The position may be determined together, or the photosensitive element 108 may determine the position of the ridges and valleys of the fingerprint based on the intensity of the received light.
  • the target object 200 can be placed on the biometric device.
  • the parameter value of a certain area 114 of the touch screen 104 changes, and a certain area 114 of the touch screen 104 corresponds to the contact area 112 of the target object 200 on the biometric device 100, thus The touch screen 104 can determine the contact area 112 of the target object 200 on the biometric device 100.
  • the touch screen 104 is, for example, not limited to utilizing a capacitive sensing principle to determine the contact area 112 of the target object 200 on the biometric device 100.
  • the target object 200 is, for example, a finger.
  • the biometric device 100 includes a display module 116 for emitting light and performing image display.
  • the display module 116 includes a plurality of pixel points 118,
  • the pixel points 118 serve as a plurality of point light sources 102, or the areas in which the individual pixel points 118 are located, respectively, for forming the point source 102.
  • the point source 102 can be formed by using the pixel 118 of the display module 116 or the area where the pixel 118 is located.
  • the display module 116 can be multiplexed into the light source of the biometric information sensing port, so that the biometric device 100 performs the biometric information sensing, and no additional point light source is needed, thereby saving the cost of the biometric device 100.
  • controller 106, the driving circuits 111, 113, and the processing circuit 110 may be integrated, for example, in one chip, and the chip is connected to the display module 116, or the controller 106, the driving circuits 111, 113, and the processing circuit 1 10 can be disposed outside the display module 116 by itself and connected to the display module 116.
  • the plurality of pixel points 118 are self-illuminating point light sources 102, or the display module 116 further includes a backlight 120, the backlight 120 is a surface light source, and the controller 106 controls a plurality of pixels. Point 11 8 to correspondingly control whether the light from the backlight 120 is emitted from the plurality of pixel points 118, and each pixel point 118 corresponds to a region of the backlight 120 to form a point light source 102, respectively.
  • the display module 116 has a wide range of types to be selected, so that the biometric device 100 has a large application range.
  • the display module 116 can be an organic light emitting diode (OLED) display module, and the OLED display module can be an active matrix organic light emitting diode (AMOL ED). Or passive organic light emitting diode (PMOLED) display module.
  • OLED organic light emitting diode
  • AMOL ED active matrix organic light emitting diode
  • PMOLED passive organic light emitting diode
  • the display module 116 is a liquid crystal display module.
  • the controller 106 controls the contact area 112. A number of pixel points 118 are illuminated to emit an optical signal to the target object 200.
  • the controller 106 controls a plurality of pixel points 118 corresponding to the contact area 112.
  • the light passing through the backlight 120 is split so that the light of the backlight 120 splits the light signal from the plurality of pixels 118 to the target object 200 to achieve the light-emitting of the point light source 102.
  • pixel point 118 corresponds to the ray of light
  • controller 106 controls pixel point 118 to cause light from backlight 120 to exit from pixel point 118.
  • the touch screen 104 includes a touch sensing layer 105 and a touch detection circuit (not labeled) for driving the touch sensing layer 105 to perform touch sensing to determine the contact area 112, wherein
  • the touch sensing layer 105 is disposed above the display module 116 or disposed inside the display module 116.
  • the touch detection circuitry is controlled, for example, by the sequence of the controller 106.
  • the touch sensing layer 105 may be an additional electrode layer or a conductive component of the multiplexing display module 116.
  • the setting of the touch screen 104 is flexible, and the cost of the biometric device 100 is reduced.
  • the touch sensing layer 105 of the touch screen 104 is disposed above the display module 116, so that the touch screen 104 can be separately manufactured. After the manufacturing is completed, the touch sensing layer 105 of the touch screen 104 is directly attached. Above the display module 116, as shown in FIG. 5, such a manufacturing process is simple.
  • the touch sensing layer 105 of the touch screen 104 is disposed inside the display module 116.
  • the sensing electrodes of the touch screen 104 multiplexed by some electrodes in the display module 116 can be utilized.
  • the cost of the biometric device 100 is reduced, and on the other hand, the thickness of the biometric device 100 is also reduced.
  • the protective cover 101 is disposed above the display module 116. It can be understood that if the touch sensing layer 105 of the touch screen 104 is disposed above the display module 116, the touch sensing layer 105 of the touch screen 104 is located between the display module 116 and the protective cover 101.
  • the display module 116 includes an opposite first substrate 122 and a second substrate 124.
  • the first substrate 122 includes a first surface 126 facing the second substrate 124, and a second
  • the substrate 124 includes a second surface 128 facing the first substrate 122.
  • the plurality of pixel points 118 are disposed between the first substrate 122 and the second substrate 122.
  • Each pixel point 118 includes a control gate 130, a pixel electrode 132, and a common Electrode 134.
  • the controller 106 can control the on and off of the switch 130, for example, such that the area where the pixel point 118 is located is transparent to achieve illumination of the point source 102.
  • the display module 116 is a liquid crystal display module, and the backlight 120 of the liquid crystal display module can be disposed outside the second substrate 124.
  • the backlight 120 of the liquid crystal display module is The surface light source
  • the controller 106 controls the conduction and the off of the switch 130 to control whether the light source from the backlight 120 is emitted from the pixel 118 to realize a point formed by the area of the backlight 120 corresponding to the pixel 118. Whether the light source 102 is lit.
  • the control gate 130 can be a thin film transistor (TFT).
  • the common electrode 134 can be multiplexed as a sensing electrode of the touch screen 104, and the sensing electrode can form a touch sensing layer of the touch screen 104.
  • the common electrode 134 includes a plurality of sub-electrodes that are separated from each other.
  • FIG. 4 only illustrates one of the structures of the display module 116, and should not be construed as limiting the present invention.
  • FIG. 6 a plurality of photosensitive elements 108, and a plurality of pixel points 118.
  • control unit 130 and the pixel electrode 132 can be fabricated on the first substrate 122 to form the photosensitive element 108 without increasing the process cost, thereby making the cost of disposing the photosensitive element 108 relatively small.
  • control gate 130 is, for example, a thin film transistor (TFT), which can form a plurality of control gates 130 and pixel electrodes 132 on the first substrate 122 by using a yellow light process ( ⁇ hotolithography).
  • TFT thin film transistor
  • the photosensitive element 108 in turn, achieves the arrangement of a plurality of photosensitive elements 108.
  • the control switch 130 is, for example, a transistor, and the photosensitive element 108 is, for example, a phototransistor. And when the control switch 130 and the photosensitive element 108 are both TFT turns, the two are, for example, not limited to being made by the same process. In addition, when the photosensitive element 108 is a COMS transistor or a CCD, the process of the photosensitive element 108 and the control switch 130 may be different, for example.
  • the control gate 130, the pixel electrode 132, and the photosensitive element 108 are formed on the first substrate 122 and are in common.
  • the electrode 134 is formed on the second substrate 124, liquid crystal is injected between the two substrates of the display module 116, and then packaged by the package 400 to form a liquid crystal display module.
  • a support 40 2 may be disposed between the two substrates to support the display module 116.
  • the display module 116 further includes a black matrix layer 136 in a grid shape, and the photosensitive element 108 is disposed in the grid region 138 corresponding to the black matrix layer 136. And for receiving an optical signal reflected by the target object 200 passing through the mesh area 138.
  • the photosensitive element 108 can be caused to receive the optical signal reflected by the target object 200.
  • the black matrix layer 136 can be applied to a liquid crystal display module and an organic light emitting diode display module.
  • one of the grid regions 138 of the black matrix layer 136 may correspond to a region of the pixel 118 of the display module 116, and a photosensitive element 108 corresponds to a grid region 138.
  • a black matrix layer 136 is disposed on the second surface 128.
  • the black matrix layer 136 is formed on the second substrate 124, which simplifies the process of the display module 116.
  • the black matrix layer 136 can be formed on the second surface 128 by printing.
  • the display module 116 further includes a color filter layer.
  • a color filter layer 140 is formed in the grid region 138 of the black matrix layer 136, and the photosensitive member 108 is configured to receive an optical signal reflected by the target object 200 passing through the color filter layer 140.
  • the color filter layer 140 can be applied to the liquid crystal display module and the OLED display module to realize the display of the color image by the display module 116.
  • the color filter layer 140 may include three color layers of red, green, and blue, and the three color layers may be arranged in a manner consistent with the arrangement of the pixel points 118 of the display module 116.
  • the self-luminous pixel of the OLED display module emits white light, and the white light passes through the color filter layer 140 and can be displayed as a color light.
  • the plurality of pixel points 118 are self-illuminating color point sources.
  • the self-luminous pixel point 118 of the display module 116 can be directly used as a point source to reduce the cost of the biometric identification device 100.
  • the display module 116 is an OLED display module
  • the pixel 118 of the display module 116 is self-illuminating
  • the plurality of pixels 118 of the display module 116 may include Pixels of three primary colors, such as red-emitting pixels, blue-emitting pixels, and green-emitting pixels
  • Each self-illuminating pixel point 118 can be implemented using an organic light emitting diode.
  • control gates 130 of the plurality of pixel points 118 and the pixel electrodes 132 are both disposed on the first surface 126, and the plurality of photosensitive elements 108 are disposed in the second On the surface 128.
  • control gate 130 and the pixel electrode 132 are disposed separately from the photosensitive element 108, which can reduce the adverse effects of the photosensitive element 108 on the control gate 130 and the pixel electrode 132.
  • the display module 116 further includes a black matrix layer 136 disposed on the second surface 128, the black matrix layer 136 is provided with a pupil 142, and the pupil 142 receives the photosensitive Component 1
  • the photosensitive element 108 is accommodated in the black matrix layer 136, which has less influence on the mouth opening rate of the display module 116.
  • connection lines of the processing circuit 110 and the first driving circuit 111 and the photosensitive element 108 may be formed under the black matrix layer 136.
  • the surface 144 is then extended along the wall of the aperture of the pupil 142 to the photosensitive element 108 and connected to the photosensitive element 108 for signal transmission.
  • the connection line may employ a transparent connecting line.
  • the photosensitive element 108 is a semiconductor photosensitive element or other suitable type of photosensitive element, wherein the semiconductor photosensitive element includes, for example, germanium, not limited to a thin film transistor (TFT), complementary type. Any one or more of a Metal Oxide Semiconductor (CMOS) transistor and a Charge-coupled Device (CCD), or other suitable types of semiconductor photosensitive elements, There are no restrictions.
  • the photosensitive element 108 can also be, for example, a photodiode.
  • the photosensitive element 108 As an example, taking the photosensitive element 108 as a TFT as an example, light is sensitive to light by using an active region material of the TFT, thereby realizing light collection. [0122] As such, a plurality of photosensitive elements 108 can be directly fabricated using a semiconductor process, making the cost of the biometric device 100 relatively low.
  • the photosensitive elements 108 may be arranged in an array on the first surface 126.
  • the first surface 126 of the biometric device 100 further includes, for example, a plurality of first scan lines G1 and a plurality of first data lines D1, the plurality of first scan lines G1 and the plurality of first data lines D1 insulation cross setting.
  • the plurality of photosensitive elements 108 are, for example, phototransistors.
  • the gate of the phototransistor 101 is connected to the first scan line G1, the source of the phototransistor is connected to the first data line D1, and the drain of the phototransistor is connected to the processing circuit 110.
  • the plurality of first scan lines G1 and the plurality of first data lines D1 are connected to the first driving circuit 111.
  • the first driving circuit 111 is configured to provide a first scan signal to the gate of the phototransistor through the first scan line G1 to activate the phototransistor, and the first driving circuit 111 is further provided through the first data line D1.
  • the drive signal is applied to the source of the activated phototransistor.
  • circuit structure of the photosensitive element 108 and the first driving circuit 111 itself and the circuit relationship between the two are only an embodiment of the present application, and the application is not limited thereto.
  • the circuit structure of the photosensitive element 108 and the first driving circuit 111 itself and the circuit relationship therebetween may also be other suitable embodiments as long as the first driving circuit 111 can drive the photosensitive element 108 to perform sensing.
  • the light reflected from the target object can be converted into an electrical signal.
  • the control switch 130 is, for example, a transistor
  • the display module 116 further includes a plurality of second scan lines G2 and a plurality of second data lines D2.
  • the second scan line G2 is insulated from the plurality of second data lines D2, wherein the second scan line G2 is connected to the gate of the transistor, and the second data line D2 and the transistor are The off source is connected, and the transistor is connected to the pixel electrode 132.
  • the second driving circuit 113 is respectively connected to the second scan line G2 and the second data line D2, and is further connected to the controller 106.
  • the controller 106 drives the point source 102 to emit light by controlling the second driving circuit 113, and the second driving circuit 113 is configured to provide a second scanning signal to the gate of the transistor through the second scanning line G2, The transistor is activated, and the second driving circuit 113 further supplies a driving signal to the pixel electrode 132 through the second data line D2 and the source of the activated transistor to cause the pixel point 118 to emit light.
  • the second driving circuit 113 may further be used to drive the pixel point 118 to perform image display.
  • the structure of the display module 116 is only an embodiment of the present application, and the application is not limited thereto.
  • the structure of the display module 116 may also be other suitable embodiments.
  • the structure of the display module of the OLED is significantly different from the above structure, and is also applicable to the present application.
  • a display module consistent with embodiments of the present application is readily conceivable to those of ordinary skill in the art.
  • the plurality of first scan lines G1 and the plurality of second scan lines G2 are disposed, for example, in parallel, and the plurality of first data lines D1 and the plurality of second data lines D2 are, for example, ⁇ Not limited to the parallel arrangement, the transistor crossing and the phototransistor are respectively disposed at the insulation intersection of each of the second scan line G2 and the second data line D2.
  • connection line connecting the photosensitive elements 108 is spaced apart from the connection line connecting the control switches 130 of the pixel points 118 on the first surface 126.
  • the controller 106 is configured to control the plurality of point light sources 102 corresponding to the contact area 112 to sequentially illuminate, or several points of a predetermined distance, at the control point source 102.
  • the light source 102 is illuminated at the same time.
  • the plurality of point light sources 102 are arranged in an array, and the plurality of point light sources 102 corresponding to the contact area 112 are also arranged in an array, and the controller 106 can control the array.
  • a plurality of point light sources 102 are sequentially turned on in order from top to bottom and from left to right.
  • the controller 106 may also control a plurality of point light sources 102 to be sequentially illuminated in other regular or irregular sequences.
  • FIG. 11 illustrates an arrangement of a plurality of point light sources 102 corresponding to the contact regions 112.
  • a plurality of point light sources 102 corresponding to the contact area 112 are arranged in 5 rows and 4 columns for a total of 20 point light sources 102.
  • 20 point light sources 102 are numbered as P11, P12, P13, ..., P53, respectively. , P54.
  • the controller 106 controls the point light source P11 to light up, and controls other point light sources.
  • the light source 108 around the point light source P11 receives the light signal reflected by the target object 200.
  • the controller 106 controls the point light source P12 to light, controls the other point light sources 102 to be extinguished, and the photosensitive element 108 around the point light source P12 receives the light signal reflected by the target object 200.
  • the controller 106 completes The taps of all of the 20 point light sources 102 corresponding to the contact areas 112 are illuminated, and the processing circuit 110 receives the electrical signals output by the photosensitive elements 108 to determine the biometric information of the target object 200.
  • the predetermined distance may be a distance between a line of point sources, a few lines of point sources, a list of point sources, or a few lines of point sources in the array.
  • the predetermined distance is a two-line point source.
  • the controller 106 controls the point light sources T11 and T41 to illuminate simultaneously, and controls the other point light sources 102 to be extinguished, and the photosensitive elements 108 around the point light sources T11 and T41 receive the light reflected by the target object 200. signal.
  • the controller 106 controls the point light sources T12 and ⁇ 42 to illuminate simultaneously, and controls the other point light sources 102 to be extinguished, and the light receiving elements 108 around the point light sources T12 and ⁇ 42 receive the light signals reflected by the target object 200.
  • the controller 106 completes the bifurcation of all of the 24 point sources 102 corresponding to the contact area 112, and the processing circuit 110 receives the electrical signals output by the photosensitive element 108 to determine the biometric information of the target object 200.
  • the horizontal accuracy of the image of the target object 200 formed by the biometric information is half of the horizontal width of the pixel
  • the vertical precision of the image of the target object 200 is half of the vertical width of the pixel.
  • mainstream electronic devices such as mobile phones, tablets, and notebook computers, can achieve image acquisition accuracy of the target object 200, and the biometric device 100 can be used in a wider range.
  • the image capturing precision of the target object 200 is horizontal lOum, vertical 30 um°.
  • the resolution is 1366 ⁇ 768 ⁇
  • the width of the pixel 118 is about 220 um
  • the image capturing precision of the target object 200 is 36 um horizontally, 1 lOumo vertically.
  • the resolution is 1920 ⁇ 1 080 ⁇
  • the width of the pixel 118 is about 270 um
  • the image capturing precision of the target object 200 is 45 mm horizontally and 135 um vertical.
  • the screen of the mainstream electronic device can realize the fingerprint image collection of the fingerprint.
  • the controller 106 is also used to control other areas 146 of the display module 116 outside the contact area 112 to continue to display images.
  • the peer of the biometric information sensing does not affect the image display of the other areas 146 of the display module 116, thereby ensuring the user experience.
  • the finger 200 when performing biometric information sensing, the finger 200 is pressed on the biometric device 100, and the controller 106 recognizes the contact area 112 of the finger on the biometric device 100, and further The area 146 of the display module 116 other than the contact area 112 is determined, and then the controller 106 controls the point source 102 corresponding to the contact area 112 to illuminate to complete the collection of biometric information. In the meantime, the controller 106 controls the other areas 146 of the display module 116 to continue displaying images.
  • the controller 106 when the display module 116 is in the off-screen state, when the biometric information sensing is performed, the controller 106 is configured to control the other regions 146 of the display module 116 outside the contact region 112 to continue. It is off.
  • the finger 200 is pressed on the biometric device 100.
  • the controller 106 identifies the contact area 112 of the biometric device 100, and further determines the area 146 of the display module 116 other than the contact area 112, and then the controller 106 controls the point light source 102 corresponding to the contact area 112 to lightly illuminate. To complete the collection of biometric information. At the same time, controller 106 controls other areas 146 of display module 116 to remain in the off state.
  • a display device 400 includes the biometric device 100 of any of the above embodiments.
  • the biometric device 100 corresponds to the contact area of the target object 200.
  • the plurality of point light sources 102 are illuminated by the splitting, so that a single point of light emission can be selected when scanning the target object 200, and a plurality of point light sources 102 that are spaced far enough apart can be selected to emit light, correspondingly, by the target object 20 0
  • the reflected light interacts with each other sufficiently small; in addition, light can be collected by the photosensitive element 108 by the principle of specular reflection, and the area of the photosensitive element 108 by the reflected light collecting area is independent of the thickness of the medium, thereby improving the image accuracy of the collected target object 200.
  • the bifurcated light source 102 can form a complete image information of the target object 200.
  • the display module 116 is, for example, an image display component of the display device 400. Since the photosensitive element 108 is disposed in the display module 116, the display device 400 can implement a full-screen execution of a biometric information sense. Test, and thus improve the user experience. In addition, it is also advantageous for the electronic device 500 having the display device 400 to be developed in a lighter and thinner direction. Further, since the biometrics device 100 multiplexes components such as the point light source 102 of the display device, the manufacturing cost can also be saved.
  • the display device 400 may be not limited to a liquid crystal display device or an organic light emitting diode display device.
  • the display device 400 includes a protective cover 101 (medium, as shown in FIG. 3) disposed at the outermost layer of the display device 400.
  • the user's finger can perform a slide, click, etc. operation on the protective cover 101 to control the display of the display device 400.
  • the finger After performing the biometric information sensing, the finger can be placed on the protective cover 101, and the touch screen 104 determines the contact area 112 of the finger on the display device, and the biometric device 100 can perform the collection of the biometric information.
  • an electronic device 500 includes the biometric device 100 of any of the above embodiments.
  • the biometric device 100 illuminates a plurality of point light sources 102 corresponding to the contact area of the target object 200, so that a single point of illumination can be selected when scanning the target object 200. It is also possible to select several point light sources 102 that are spaced far enough apart to emit light. Accordingly, the light reflected by the target object 20 0 is sufficiently small to affect each other; in addition, light can be collected by the photosensitive element 108 by the principle of specular reflection, and the photosensitive element 108 passes The area of the reflected light collection area is independent of the thickness of the medium, thereby improving the image accuracy of the acquisition target object 200. At the same time, the bifurcated light source 102 can form a complete image information of the target object 200. .
  • the electronic device 500 is, for example, a consumer electronic product or a home-based electronic product or a vehicle-mounted electronic product.
  • consumer electronics such as mobile phones, tablets, laptops, desktop monitors, All kinds of electronic products that use biometric technology such as computer integrated machines.
  • Home-based electronic products such as smart door locks, televisions, refrigerators and other electronic products that use biometric technology.
  • Vehicle-mounted electronic products such as car navigation systems, car DVDs, etc.
  • the electronic device 500 is a mobile phone, and the front surface of the mobile phone is provided with a touch screen 104 and a display device 400.
  • fingerprint information is collected. That is, the target object 200 is a finger, and the finger is placed on the touch screen 104 and the display device 400, so that the touch screen 104 can determine the contact area of the finger on the biometric device 100, and the biometric device 100 performs subsequent fingerprint information collection.
  • the biometric device 100 may not be disposed on the display device 400, and the image capturing portion of the biometric device 100 may be integrated into a biometric chip, corresponding to
  • the electronic device 500 is disposed at a suitable position on the front, the back, and the side of the electronic device 500, and may be exposed to the outer surface of the electronic device 500 or may be disposed inside the electronic device 500 adjacent to the outer casing.
  • first and second are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated.
  • features defining “first” and “second” may include at least one of the features, either explicitly or implicitly.
  • the meaning of “plurality” is at least two, such as two, three, etc., unless specifically defined otherwise.

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  • Theoretical Computer Science (AREA)
  • Data Mining & Analysis (AREA)
  • Bioinformatics & Cheminformatics (AREA)
  • Bioinformatics & Computational Biology (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Evolutionary Biology (AREA)
  • Evolutionary Computation (AREA)
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  • General Engineering & Computer Science (AREA)
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Abstract

La présente invention concerne un dispositif électronique (500) et un dispositif de reconnaissance biologique (100). Le dispositif de reconnaissance biologique comprend : une pluralité de sources de lumière ponctuelle (102), un écran tactile (104), un dispositif de commande (106), une pluralité d'éléments photosensibles (108) et un circuit de traitement (110). L'écran tactile (104) est utilisé de manière à déterminer la zone de contact (112) d'un objet cible (200) sur le dispositif de reconnaissance biologique (100) ; le dispositif de commande (106) est utilisé de manière à commander la pluralité de sources de lumière ponctuelle (102) correspondant à la zone de contact (112) devant être éclairée par répartition dans le temps de façon à émettre un signal optique vers l'objet cible (200) ; la pluralité d'éléments photosensibles (108) est utilisée de manière à recevoir le signal optique réfléchi par l'objet cible (200), et convertir le signal optique reçu en un signal électrique correspondant ; et le circuit de traitement (110) est utilisé de manière à déterminer des informations de caractéristique biologique de l'objet cible (200) conformément au signal électrique. Le dispositif électronique (500) comprend la puce de reconnaissance biologique (100).
PCT/CN2016/104456 2016-11-03 2016-11-03 Dispositif électronique et puce de reconnaissance biologique WO2018081981A1 (fr)

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PCT/CN2016/104456 WO2018081981A1 (fr) 2016-11-03 2016-11-03 Dispositif électronique et puce de reconnaissance biologique

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CN108229388B (zh) * 2017-12-30 2021-10-26 柳州梓博科技有限公司 感光驱动电路、感光装置及电子设备
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