WO2018082401A1 - Dispositif d'affichage et dispositif électronique - Google Patents

Dispositif d'affichage et dispositif électronique Download PDF

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Publication number
WO2018082401A1
WO2018082401A1 PCT/CN2017/101614 CN2017101614W WO2018082401A1 WO 2018082401 A1 WO2018082401 A1 WO 2018082401A1 CN 2017101614 W CN2017101614 W CN 2017101614W WO 2018082401 A1 WO2018082401 A1 WO 2018082401A1
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WIPO (PCT)
Prior art keywords
display device
display module
display
target object
disposed
Prior art date
Application number
PCT/CN2017/101614
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English (en)
Chinese (zh)
Inventor
李问杰
Original Assignee
深圳信炜科技有限公司
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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
Publication of WO2018082401A1 publication Critical patent/WO2018082401A1/fr

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F21/30—Authentication, i.e. establishing the identity or authorisation of security principals
    • G06F21/31—User authentication
    • G06F21/32—User authentication using biometric data, e.g. fingerprints, iris scans or voiceprints
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers

Definitions

  • the utility model relates to the field of biometric identification, in particular to a display device and an electronic device capable of performing biometric information sensing on a full screen.
  • 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 when the finger is pressed on the glass cover, the ridge of the fingerprint contacts the glass cover, 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 the fingerprint image formed by the light emitted by the surface light source and reflected by the finger will be affected by the thickness of the glass cover plate.
  • the thickness of the glass is increased, it is collected by the scattering of light.
  • the accuracy of the 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 need to provide a display device and an electronic device capable of performing biometric information sensing in full screen.
  • the present invention provides a display device for performing image display and for performing biometric information sensing.
  • the display device includes:
  • a touch screen for determining a contact area of the target object on the display device
  • controller configured to control a plurality of the point light sources corresponding to the contact area to lightly illuminate to emit an optical signal to the target object
  • Processing circuitry for determining biometric information of the target object based on the electrical signal.
  • the display device includes a display module, the display module is configured to emit light and perform image display, and the plurality of sensing elements are disposed in the display module, and the display module includes multiple a pixel, the plurality of pixel points being used as the plurality of point light sources, or an area where 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 source is a surface light source, and the controller controls the plurality of pixel points by Correspondingly controlling 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 is an organic light emitting diode display module; when the display module includes a backlight, the display module is a liquid crystal Display module.
  • the touch screen includes a touch sensing layer and a touch detection circuit, where the touch detection circuit is configured to drive the touch sensing layer to perform touch sensing, wherein the touch sensing layer is disposed above the display module, or is set 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 a first substrate a second surface, the plurality of pixel points being disposed between the first substrate and the second substrate, each of the pixel points including a control switch, a pixel electrode, and a common electrode.
  • the plurality of photosensitive elements, the control switch 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 photosensitive element is disposed in a mesh area corresponding to the black matrix layer, and is configured to receive a space passing through the mesh area. The optical signal reflected by the target object.
  • the black matrix layer is disposed on the second surface.
  • the display module further includes a color filter layer formed on a mesh area of the black matrix layer, and the photosensitive element is configured to receive through the color filter layer An optical signal reflected by the target object.
  • the plurality of pixel points are self-illuminating color point light sources.
  • control switch and the pixel electrode of the plurality of pixel points are disposed on the first surface, and the plurality of photosensitive elements are disposed on the second surface.
  • the display module further includes a black matrix layer disposed on the second surface, the black matrix layer is provided with an opening, and the opening receives the photosensitive element and The photosensitive element can be caused 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 an area where each point source is located.
  • the display device further includes a plurality of first scan lines and a plurality of first data lines, wherein the plurality of first scan lines are insulated from the plurality of first data lines, and the plurality of light sensing
  • the component is a phototransistor, 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 display device further includes a first driving circuit, connected to the plurality of first scan lines and the plurality of first data lines, for providing a first scan signal to the phototransistor through the first scan line a gate to activate the phototransistor, the first driver circuit further providing a drive signal to the source of the activated phototransistor through the first data line.
  • a first driving circuit connected to the plurality of first scan lines and the plurality of first data lines, for providing a first scan signal to the phototransistor through the first scan line a gate to activate the phototransistor, the first driver circuit further providing 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 performing biometric information sensing, the first driving circuit is configured to drive the plurality of photosensitive elements to operate under the control of the controller.
  • control switch is a transistor switch
  • the display module further includes a plurality of second scan lines and a plurality of second data lines, the plurality of second scan lines and the plurality of second data lines
  • An insulation cross arrangement wherein the second scan line is connected to a gate of the transistor switch, the second data line is connected to a source of the transistor switch, and the transistor switch 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, and each second scan line
  • the transistor switch and the photo transistor are respectively disposed at an insulation intersection with the second data line.
  • the display 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 controls the second driving a circuit for driving a point source to emit light, the second driving circuit for supplying a second scan signal to the transistor switch through the second scan line a gate to activate a transistor switch, the second driver circuit further providing a driving signal to the pixel electrode through the second data line and the source of the activated transistor switch to cause the pixel to be illuminated.
  • the transistor switch and the phototransistor are both thin film transistors, and the processes of the two are the same.
  • the controller when controlling the point light source to be time-divisionally lit, is configured to control a plurality of the point light sources corresponding to the contact area to sequentially illuminate, or a plurality of the point light sources of a predetermined distance Light 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 the pixel Half the vertical width.
  • the controller when the display module displays an image, when performing the biometric information sensing, the controller is further configured to control another area of the display module outside the contact area to continue to display an image. .
  • the controller when the display module is in a blackout state, when performing the biometric information sensing, the controller is configured to control other areas of the display module outside the contact area to continue to be extinguished. Screen status.
  • the biometric information includes any one or more of fingerprint information, palm print information, and ear print information.
  • the plurality of photosensitive elements are dispersed throughout the image display area of the display device to perform biometric information sensing throughout the image display area.
  • the present invention also provides an electronic device characterized by comprising the display device according to any of the above.
  • the display device since the display device uses a time-division illumination for a plurality of point light sources corresponding to the contact area of the target object, a single-point illumination can be selected when the target object is scanned, and a plurality of predetermined intervals can be selected.
  • the point source emits light, and accordingly, the light reflected by the target object has a small influence on each other; 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 area of the reflected light is independent of the thickness of the medium, thereby improving the collection.
  • the image accuracy of the target object Accordingly, the user experience of the electronic device having the display device is better.
  • the display device can perform biometric information sensing on a full screen to further enhance the user experience.
  • FIG. 1 is a 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 according to 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 view 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 view of another part of a display module of the biometric device according to an embodiment of the present invention.
  • FIG. 10 is a schematic view showing the distribution of photosensitive elements of the biometric identification device according to an embodiment of the present invention.
  • FIG. 11 is a schematic view showing a distribution of a point light source corresponding to a contact area of a biometric device according to an embodiment of the present invention
  • FIG. 12 is another schematic diagram of distribution of a point light source 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.
  • 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” or “second” may include one or more of the described features either explicitly or implicitly.
  • the meaning of "a plurality" is two or more unless specifically and specifically defined otherwise.
  • connection is to be understood broadly, and may be, for example, a fixed connection or a Disassembling the connection, or connecting integrally; may be mechanical connection, electrical connection or communication with each other; may be directly connected, or may be indirectly connected through an intermediate medium, may be internal communication of two elements or mutual interaction of two elements Role relationship.
  • installation is to be understood broadly, and may be, for example, a fixed connection or a Disassembling the connection, or connecting integrally; may be mechanical connection, electrical connection or communication with each other; may be directly connected, or may be indirectly connected through an intermediate medium, may be internal communication of two elements or mutual interaction of two elements Role relationship.
  • the specific meanings of the above terms in the present invention can be understood on a case-by-case basis. Righteousness.
  • 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 driving circuit 111 . And a second driving circuit 113.
  • the touch screen 104 is used to determine the contact area 112 of the target object 200 on the biometric device 100.
  • the controller 106 is configured to control a plurality of point light sources 102 corresponding to the contact area 112 to illuminate in time 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 to lightly emit light signals to the target object, for example, by controlling the second driving circuit 113.
  • the biometric device 100 since the biometric device 100 uses time-division lighting for a plurality of point light sources 102 corresponding to the contact area of the target object 200, a single-point illumination can be selected when the target object 200 is scanned, or alternatively, A plurality of point light sources 102 that are spaced far enough apart are illuminated, and accordingly, the light reflected by the target object 200 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 photosensitive element 108 passes through the reflected light collecting region. The area is independent of the thickness of the medium, thereby improving the image accuracy of the acquisition target object 200.
  • the time-division illumination 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.
  • a portion of the biometric device 100 for acquiring an image may also be formed in a display module of the display device,
  • the display module is configured to receive a finger contact or proximity of the user to sense image information of the target object 200, so that the display device can perform biometric information sensing on a full screen, thereby improving the user experience, and is also beneficial to the user.
  • the electronic device having the biometric device 100 is developed in a lighter and thinner direction.
  • the biometric information includes, for example, but not limited to any one or more of fingerprint information, palm print information, and ear print information. Accordingly, 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 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 element 108 is disposed corresponding to one point light source 102 to achieve a better receiving effect.
  • the arrowed line in FIG. 3 indicates light.
  • 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 to the first medium.
  • the collection area of the reflected light of the first target object 304 (eg, a finger) on the 300 is the same as the collection area of the reflected light of the second target object 306 (eg, a finger) on the second medium 302, thereby ensuring the image of the acquisition target object 200. Precision.
  • 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, the positional relationship of the photosensitive element 108 and the point light source 102, and is not limited to the positional relationship shown in FIG. 3, and 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, wherein the mirror surface
  • the reflected light is much stronger than the diffuse reflected light, so that after 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 position of the ridge of the fingerprint can be It is determined that, alternatively, the photosensitive element 108 can also determine the position of the ridges and valleys of the fingerprint based on the intensity of the received light.
  • the target object 200 When performing biometric information sensing, referring to FIG. 2, the target object 200 may be placed on the protective cover 101 of the electronic device to which the biometric device 100 is applied, and the parameter value of a certain area 114 of the touch screen 104 changes, the touch screen A certain area 114 of 104 corresponds to the contact area 112 of the target object 200 on the biometric device 100, and 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 can determine the contact area 112 of the target object 200 on the biometric device 100 using, for example, but not limited to, a capacitive sensing principle.
  • 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 and a plurality of pixel points 118. As much The point sources 102, or the regions in which the individual pixels 118 are located, are used to form the point source 102, respectively.
  • the point source 108 can be formed by using the pixel 118 of the display module 116 or the area where the pixel 118 is located, so that the display module 116 can be multiplexed into the light source when the biometric information is sensed, so that the biometric device 100 is executing.
  • the biometric information is sensed, no additional point light source is needed, which saves 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, the chip is connected to the display module 116, or the controller 106, the driving circuits 111, 113, and the processing circuit 110 may be used by themselves. It is disposed outside the display module 116 and is respectively connected to the display module 116.
  • the plurality of pixels 118 are self-illuminating point 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 the plurality of pixels 118 by Correspondingly, whether the light from the backlight 120 is emitted from the plurality of pixel points 118, each pixel point 118 forms a point light source 102 corresponding to the area of the backlight 120.
  • 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 (AMOLED) or passive organic light emitting. Diode (PMOLED) display module.
  • OLED organic light emitting diode
  • AMOLED 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 a plurality of pixels corresponding to the contact area 112.
  • the point 118 is illuminated to emit an optical signal to the target object 200.
  • the controller 106 controls the plurality of pixel points 118 corresponding to the contact area 112 to be time-divided.
  • the light of the backlight 120 is passed through such that the light of the backlight 120 is emitted from the plurality of pixel points 118 to the target object 200 to achieve time-division illumination of the point source 102.
  • pixel point 118 corresponds to a switch of light, and controller 106 controls pixel point 118 to cause light from backlight 120 to exit from pixel point 118.
  • touch screen 104 includes a touch sensing layer 105 and a touch detection circuit (not labeled) for driving touch sensing layer 105 to perform touch sensing to determine 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 timing of the controller 106.
  • the touch sensing layer 105 may be an additional electrode layer or a conductive element of the multiplexing display module 116 when the touch sensing layer 105 is disposed inside the display module 116.
  • the manner in which the touch screen 104 is disposed is flexible, reducing the cost of the biometric device 100.
  • 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 to the display mode. Above the group 116, as shown in Figure 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 used to reduce the biological activity.
  • the cost of the identification device 100 also reduces the thickness of the biometric device 100.
  • the protective cover 101 is disposed above the display module 116. It can be understood that when 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 the second substrate 124 includes A plurality of pixel points 118 are disposed between the first substrate 122 and the second substrate 124 toward the second surface 128 of the first substrate 122.
  • Each of the pixel points 118 includes a control switch 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 backlight 120 of the liquid crystal display module may be disposed outside the second substrate 124, and the backlight 120 of the liquid crystal display module is a surface light source.
  • the controller 106 controls whether the light source from the backlight 120 is emitted from the pixel point 118 by controlling the on and off of the control switch 130 to realize whether the point light source 102 formed by the area of the backlight 120 corresponding to the pixel point 118 is clicked. bright.
  • the control switch 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.
  • a plurality of photosensitive elements 108, a plurality of control points 130 of pixel points 118, and pixel electrodes 132 are disposed on the first surface 126.
  • the photosensitive element 108 can be formed while the control switch 130 and the pixel electrode 132 are fabricated on the first substrate 122 without increasing the process cost, thereby making the cost of providing the photosensitive element 108 low.
  • control switch 130 is, for example, a thin film transistor (TFT), which can form a control switch 130 and a pixel electrode 132 on the first substrate 122 by using yellow light photolithography.
  • TFT thin film transistor
  • the photosensitive elements 108 enable the placement of a plurality of photosensitive elements 108.
  • the control switch 130 is, for example, a transistor switch
  • the photosensitive element 108 is, for example, a phototransistor
  • the control switch 130 and the photosensitive element 108 are both TFTs, the two are made, for example but not limited to, by the same process.
  • the photosensitive element 108 is a COMS transistor or a CCD
  • the manufacturing process of the photosensitive element 108 and the control switch 130 may be different, for example.
  • the control switch 130, the pixel electrode 132, and the photosensitive element 108 are formed on the first substrate 122 and formed on the common electrode 134.
  • 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 402 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 is used for An optical signal reflected by the target object 200 passing through the mesh region 138 is received.
  • 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 one pixel 118 of the display module 116, and one 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 140 formed on the grid region 138 of the black matrix layer 136, and the photosensitive element 108.
  • An optical signal for receiving a target object 200 that passes through the color filter layer 140 is not limited to FIG. 4, FIG. 7, and FIG. 9, the display module 116.
  • the color filter layer 140 can be applied to the liquid crystal display module and the organic light emitting diode display module to implement the color display of 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 light source to reduce biological knowledge.
  • the cost of the device 100 is not limited to, but not limited to, but not limited to, but not limited to, but not limited to, but not limited to, but not limited to, but not limited to, but not limited to, but not limited to, but not limited to, but not limited to, but not limited to, but not limited to, but not limited to reduce biological knowledge. The cost of the device 100.
  • the display module 116 when the display module 116 is an OLED display module, the pixel 118 of the display module 116 is self-illuminating, and the plurality of pixels 118 of the display module 116 may include three primary colors. Pixels, such as red-emitting pixels, blue-emitting pixels, and green-emitting pixels, each self-illuminating pixel 118 can be implemented using an organic light emitting diode.
  • control switch 130 and the pixel electrode 132 of the plurality of pixel points 118 are disposed on the first surface 126, and the plurality of photosensitive elements 108 are disposed on the second surface 128.
  • control switch 130 and the pixel electrode 132 are disposed separately from the photosensitive element 108, and the adverse effect of the photosensitive element 108 on the control switch 130 and the pixel electrode 132 can be reduced.
  • 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 an opening 142, and the opening 142 receives the photosensitive element 108 and can The photosensitive element 108 is caused to receive an optical signal reflected by the target object 200.
  • the photosensitive element 108 is housed in the black matrix layer 136 with less influence on the aperture ratio of the display module 116.
  • a connection line of the processing circuit 110 and the first driving circuit 111 to the photosensitive element 108, respectively, may be formed on the lower surface 144 of the black matrix layer 136. Then, the photosensitive element 108 is extended along the wall of the opening of the opening 142 and connected to the photosensitive element 108 to realize signal transmission.
  • the connecting line can adopt 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, but is not limited to, a Thin Film Transistor (TFT), a complementary metal oxide. Any one or more of a semiconductor (CMOS) transistor and a charge-coupled device (CCD), or other suitable type of semiconductor photosensitive element, the present invention does not do this. limit.
  • the photosensitive element 108 can also be, for example, a photodiode.
  • the photosensitive element 108 is sensitive to light by using an active area material of the TFT, thereby realizing light collection.
  • a plurality of photosensitive elements 108 can be directly fabricated using a semiconductor process, making the cost of the biometric device 100 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 Connected to the first scan line G1, the source of the photo transistor is connected to the first data line D1, and the drain of the photo transistor 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 further provides a driving signal to the first data line D1. 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 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 target object reflection. The light that comes back and converts the optical signal into an electrical signal.
  • the control switch 130 is, for example, a transistor switch.
  • the display module 116 further includes a plurality of second scan lines G2 and a plurality of second data lines D2, and the plurality of second scan lines G2 and The plurality of second data lines D2 are insulated and disposed, wherein the second scan line G2 is connected to a gate of the transistor switch, and the second data line D2 is connected to a source of the transistor switch.
  • the transistor switch is connected to the pixel electrode 132.
  • the second driving circuit 113 is connected to the second scan line G2 and the second data line D2, respectively, and is further connected to the controller 106.
  • the controller 106 drives the point light source 102 to emit light by controlling the second driving circuit 113, and the second driving circuit 113 is configured to provide a second scan signal to the gate of the transistor switch through the second scan line G2 to activate
  • the transistor switch further provides a driving signal to the pixel electrode 132 through the second data line D2 and the source of the activated transistor switch to cause the area of the pixel point 118 to emit light.
  • the second driving circuit 113 can 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.
  • the application is not limited thereto.
  • the structure of the display module 116 may also be other suitable embodiments, for example,
  • the structure of the display module of the OLED is significantly different from the above structure, but is also applicable to the present application.
  • a display module consistent with an embodiment of the present application is easily conceivable.
  • the plurality of first scan lines G1 and the plurality of second scan lines G2 are disposed, for example, but not limited to being parallel, and the plurality of first data lines D1 and the plurality of second data lines D2 are, for example but not limited to, parallel. It is provided that the transistor switch and the photo transistor 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 connected to the control switch 130 connecting the pixel points 118.
  • the wiring interval is disposed on the first surface 126.
  • the controller 106 when the control point light source 102 is time-divisionally illuminated, the controller 106 is configured to control the plurality of point light sources 102 corresponding to the contact area 112 to sequentially light up, or several point light sources 102 of a predetermined distance simultaneously Light up.
  • the plurality of point light sources 102 are arranged in an array, and the plurality of point light sources 102 corresponding to the contact areas 112 are also arranged in an array, and the controller 106 can control several points in the array.
  • the light sources 102 are sequentially turned on in order from left to right and from left to right.
  • the controller 106 may also control the plurality of point light sources 102 to sequentially illuminate according to other regular or irregular orders.
  • 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 a total of 20 point light sources 102 in 5 rows and 4 columns.
  • the 20 point light sources 102 are numbered P11, P12, P13, ..., P53, P54, respectively. .
  • the controller 106 controls the point light source P11 to illuminate, controls the other point source 102 to be extinguished, and the photosensitive element 108 around the point source P11 receives the optical signal reflected by the target object 200.
  • the controller 106 controls the point light source P12 to light, controls the other point source 102 to be extinguished, and the photosensitive element 108 around the point source P12 receives the light signal reflected by the target object 200.
  • the controller 106 completes the time-division illumination of all 20 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 predetermined distance may be the 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.
  • a plurality of point light sources 102 corresponding to the contact area 112 are arranged in 6 rows and 4 columns for a total of 24 point light sources 102.
  • 24 point light sources 102 are provided. They are numbered T11, T12, T13, ..., T63, T64.
  • the predetermined distance is a two-line point source.
  • the controller 106 controls the point light sources T11 and T41 to simultaneously illuminate, 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 optical signals reflected by the target object 200.
  • the controller 106 controls the point light sources T12 and T42 to simultaneously illuminate, controls the other point light sources 102 to be extinguished, and the light receiving elements 108 around the point light sources T12 and T42 receive the light signals reflected by the target object 200.
  • the controller 106 completes the time-division illumination 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 the horizontal width of the pixel, and the vertical precision of the image of the target object 200 is half 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 applied in a wider range.
  • the width of the pixel 118 is about 60 ⁇ m, and the image capturing accuracy of the target object 200 is 10 ⁇ m horizontally and 30 ⁇ m vertical.
  • the width of the pixel 118 is about 220 um, and the image capturing accuracy of the target object 200 is 36 ⁇ m horizontally and 110 ⁇ m vertical.
  • the resolution is 1920 ⁇ 1080
  • the width of the pixel 118 is about 270 um
  • the image capturing precision of the target object 200 is 45 um horizontally and 135 um vertical.
  • the screen of the mainstream electronic device can realize the fingerprint image collection of the fingerprint.
  • the controller 106 when the display module 116 displays an image, when performing biometric information sensing, the controller 106 is further configured to control the other regions 146 of the display module 116 outside the contact area 112 to continue displaying images.
  • the image display of the other regions 146 of the display module 116 is not affected, and the user experience is ensured.
  • 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, thereby determining the display module.
  • the controller 106 controls the point source 102 corresponding to the contact area 112 to illuminate in time to complete the acquisition of biometric information.
  • controller 106 controls other areas 146 of display module 116 to continue to display 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 area 112 to continue to be off. status.
  • the other regions 146 of the display module 116 are not affected to be in the off-screen state, thereby ensuring the user experience.
  • the finger 200 is pressed on the biometric device 100, and the controller 106 identifies the contact area 112 of the biometric device 100, thereby determining that the display module 116 is other than the contact area 112. Region 146, then controller 106 controls point light source 102 corresponding to contact region 112 to illuminate in time to complete acquisition of biometric information. At the same time, controller 106 controls other regions 146 of display module 116 to remain in the off-screen state.
  • a display device 400 includes the biometric device 100 of any of the above embodiments.
  • the biometric device 100 uses time-division lighting for a plurality of point light sources 102 corresponding to the contact area of the target object 200, a single-point illumination can be selected when the target object 200 is scanned, and the reservation can be selected.
  • a plurality of point light sources 102 spaced far enough apart emit light, and accordingly, the light reflected by the target object 200 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 photosensitive element 108 passes through the reflected light collecting region.
  • the area is independent of the thickness of the medium, thereby improving the image accuracy of the acquisition target object 200.
  • the time-division illumination point 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 perform biometric information sensing on a full screen. 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 direction that is lighter and thinner. 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, but 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.
  • a 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 implement the collection of biometric information.
  • an electronic device 500 includes the biometric device 100 of any of the above embodiments.
  • the biometric device 100 uses the time-lighting of the plurality of point light sources 102 corresponding to the contact area of the target object 200, the single-point illumination can be selected when the target object 200 is scanned, and the predetermined point can be selected.
  • a plurality of point light sources 102 spaced far enough apart emit light, and accordingly, the light reflected by the target object 200 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 photosensitive element 108 passes through the reflected light collecting region.
  • the area is independent of the thickness of the medium, thereby improving the image accuracy of the acquisition target object 200.
  • the time-division illumination point source 102 can form a complete image information of the target object 200.
  • the electronic device 500 includes the biometric device 100, correspondingly, the electronic device 500 can have the following three main advantages.
  • the thickness of the biometric device phase 100 is thinner than that of the fingerprint recognition module using the camera. Therefore, the thickness of the electronic device 500 having the biometric device 100 is thin, and does not affect the development of the electronic device 500 in the direction of thinning;
  • the sensing accuracy of the biometric device 100 is less affected by the thickness of the glass cover plate, and therefore, after the biometric device 100 is placed under the protective cover of the electronic device 500, the sensing of the biometric device 100 The accuracy is less affected, thereby improving the user experience of the electronic device 500;
  • the portion of the biometric device 100 used for image acquisition may be disposed in the display module 116 of the display device 400, so that the electronic device 500 can perform full-screen execution of biometric information collection. Further, the user's experience is improved.
  • the biometric device 500 can realize the point light source and the like by using some existing components in the display module 116, thereby saving materials, reducing the overall cost of the electronic device 500, and making the electronic device 500 relatively thin and light. .
  • the electronic device 500 is, for example, a consumer electronic product or a home-based electronic product or a vehicle-mounted electronic product.
  • consumer electronic products such as mobile phones, tablets, notebook computers, desktop monitors, computer integrated machines and other electronic products using biometric identification technology.
  • Home-based electronic products such as intelligent 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.
  • the biometric information to be collected is fingerprint information
  • the target is The object 200 is a finger placed on the touch screen 104 and the display device 400 such 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.
  • the image collection portion of the biometric device 100 may be integrated into a biometric chip, correspondingly disposed in the electronic device.
  • the front side, the back side, and the side of the device 500 are at appropriate positions, 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” or “second” may include at least one of the features, either explicitly or implicitly.
  • the meaning of "a plurality” is at least two, such as two, three, etc., unless specifically defined otherwise.

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Abstract

L'invention concerne un dispositif d'affichage et un dispositif électronique. Le dispositif d'affichage sert à réaliser un affichage d'image et à effectuer une détection d'informations de caractéristiques biométriques, et il comporte : une pluralité de sources de lumière ponctuelles (102) ; un écran tactile (104) permettant de déterminer une zone de contact (112) d'un objet cible (200) sur le dispositif d'affichage ; un dispositif de commande (106) destiné à commander un éclairage synchronisé de la pluralité de sources de lumière ponctuelles (102) correspondant à la zone de contact (112) pour émettre des signaux lumineux vers l'objet cible (200) ; une pluralité d'éléments photosensibles (108) conçus pour recevoir les signaux lumineux réfléchis par l'objet cible (200) et convertir les signaux lumineux reçus en signaux électriques correspondants ; et un circuit de traitement (110) prévu pour déterminer des informations de caractéristiques biométriques de l'objet cible (200) sur la base du signal électrique. Le dispositif électronique comprend le dispositif d'affichage.
PCT/CN2017/101614 2016-11-03 2017-09-13 Dispositif d'affichage et dispositif électronique WO2018082401A1 (fr)

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