• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A display and detection system (30) includes an image sensor (22), a display screen (12) and an anti-glare system (32) overlaying the display screen (12) and the image sensor (22), which anti-glare system comprises an electrically controllable rectilinear polarizer (34).
    公开号:FR3070095A1
    申请号:FR1757672
    申请日:2017-08-11
    公开日:2019-02-15
    发明作者:Wilfrid Schwartz；Agathe Puszka；Quentin CHABLE；Benjamin BOUTHINON
    申请人:Isorg SA；
    IPC主号:
    专利说明:

    DISPLAY AND DETECTION SYSTEM
    Field
    The present application relates to a display and detection system and more particularly to a display system associated with an image sensor.
    Presentation of the prior art
    For some applications, it is desirable to be able to detect a user's fingerprint by means of a fingerprint sensor integrated into a display screen. For example, a screen fitted with a fingerprint sensor could equip mobile phones. There are display and detection systems comprising a display screen and an optical image sensor which could allow the creation of a fingerprint sensor. US Patent 9570002 describes an example of such a display and detection system comprising a display screen and an infrared image sensor.
    Most display screens are partially reflective and it is necessary, for the comfort of the user, to attenuate any reflections. Thus, these display screens are generally equipped with an anti-reflective system. An example of an anti-reflection system is described in relation to FIG. 1.
    B16386
    FIG. 1 is an exploded and simplified view of a partially reflecting display screen 1 covered with an anti-reflection system 3.
    The anti-reflection system 3 is positioned in front of the display screen 1. The anti-reflection system 3 comprises a rectilinear polarizer 5 and a quarter-wave plate 7. The quarter-wave plate 7 is positioned between the rectilinear polarizer 5 and the display screen 1. The axes of the quarter-wave plate 7 are oriented at 45 degrees relative to the axis of the straight polarizer 5.
    The operation of an anti-reflection system of this type is as follows. An incident non-polarized light beam R g firstly passes through the rectilinear polarizer 5 and becomes a light beam R g with rectilinear polarization. The quarter-wave plate 7 then transforms the light beam R g into a light beam Rg with right or left circular polarization. This beam Rg is partially reflected by the display screen 1 in a reflected light beam R3. The reflected light beam R3 has a circular polarization opposite to that of the light beam Rg, that is to say left or right. The quarter-wave plate 7 then transforms the light beam R3 into a light beam R4 with rectilinear polarization. The direction of polarization of the light beam R4 is then orthogonal to that of the light beam Rg. The polarizer 5 then prevents the light beam R4 from passing.
    It would be desirable to be able to produce a display system equipped with an anti-reflection system comprising an optical image sensor, for example a fingerprint sensor. summary
    Thus, one embodiment provides a display and detection system comprising:
    an image sensor;
    a display screen; and an anti-reflection system covering the display screen and the image sensor, this anti-reflection system comprising an electrically controllable rectilinear polarizer.
    B16386
    According to one embodiment, the anti-reflection system further comprises a quarter-wave plate.
    According to one embodiment, the electrically controllable rectilinear polarizer is a liquid crystal polarizer.
    According to one embodiment, the display screen covers the image sensor.
    According to one embodiment, the display screen comprises a light-emitting layer and an encapsulation layer covering the light-emitting layer.
    According to one embodiment, the photoemitting layer is an OLED type layer.
    According to one embodiment, the display screen comprises a transparent substrate on which the photoemitting layer rests.
    According to one embodiment, the anti-reflection system is covered with a transparent coating.
    According to one embodiment, the transparent coating is made of glass.
    According to one embodiment, the image sensor comprises a matrix of organic sensors.
    According to one embodiment, the system further comprises an angular filter, between the image sensor and the display screen, adapted to block the incident rays whose incidence relative to a direction orthogonal to one face of the angular filter is greater than a threshold and to allow at least certain incident rays to pass, the incidence of which with respect to a direction orthogonal to the face is less than the threshold.
    One embodiment also provides for the use of the display and detection system as defined above for the detection of at least one fingerprint of a user.
    According to one embodiment, the image sensor plays the role of a tactile surface.
    An embodiment also provides a method for controlling the display and detection system as defined.
    B16386 previously, in which the electrically controllable rectilinear polarizer is deactivated each time the image sensor is used.
    Brief description of the drawings
    These characteristics and advantages, as well as others, will be explained in detail in the following description of particular embodiments made without implied limitation in relation to the attached figures, among which:
    Figure 1, previously described, illustrates an anti-reflective system;
    the figure 2 East a diagram simplified a system display and detection ; and the figure 3 East a diagram simplified a fashion of
    creation of a display and detection system. detailed description
    The same elements have been designated by the same references in the different figures. For the sake of clarity, only the elements useful for understanding the described embodiments have been shown and are detailed.
    In the following description, when reference is made to qualifiers of relative position, such as the term above, reference is made to the orientation of the figures. Unless otherwise specified, the expression approximately means to the nearest 10%, preferably to the nearest 5%.
    In the following description, electromagnetic radiation whose wavelength is between 400 nm and 700 nm is called visible light and electromagnetic radiation with a wavelength between 700 nm and 10 pm is called infrared radiation. .
    A pixel of an image corresponds to the unitary element of the image displayed by a display screen. When the display screen is a color image display screen, it generally comprises, for the display of each pixel of the image, at least three emission and / or light intensity regulation components. , also called display subpixels, which
    B16386 each emits light radiation in substantially one color (for example, red, green or blue). The superposition of the radiations emitted by these three display sub-pixels provides the observer with the colored sensation corresponding to the pixel of the displayed image. In this case, the display screen display pixel is the assembly formed by the three display sub-pixels used for displaying a pixel of an image.
    FIG. 2 is a simplified diagram of a display and detection system 10 adapted to display an image and to detect an image, for example a fingerprint.
    The display and detection system 10 comprises a display screen 12. The display screen 12 is for example made up of a stack comprising successively:
    a transparent substrate 14, for example made of a polymer or a glass;
    - A light emitting layer 16 resting on the substrate 14 and in contact with the latter; and
    - A transparent encapsulation layer 18, for example of a polymer, resting on the photoemitting layer 16 and in contact with the latter.
    The substrate 14 and the encapsulation layer 18 are transparent to visible light and to infrared.
    The light emitting layer 16 comprises a matrix of display pixels. Each display pixel comprises an optoelectronic component adapted to emit electromagnetic radiation, also called an electroluminescent component. Each light-emitting component corresponds for example to a light-emitting diode, in particular to an organic light-emitting diode (OLED, from the English Organic LightEmitting Diode). The display pixels may further comprise conductive tracks and switching elements, in particular transistors, not shown, allowing the selection of display pixels.
    B16386
    The display and detection system 10 further comprises an antireflection system 20 of the type described in relation to FIG. 1. There is the rectilinear polarizer 5 and the quarter wave plate 7. The antireflection system 20 is arranged on and in contact with the display screen 12, that is to say that the quarter-wave plate 7 rests on and in contact with the encapsulation layer 18 of the display screen 12.
    The display and detection system 10 further comprises an image sensor 22. As an example, the image sensor 22 is located under the display screen 12, that is to say that the substrate 14 of the display screen 12 rests on and in contact with the image sensor 22. The image sensor 22 comprises a matrix of photon sensors, or photodetectors. The photodetectors are arranged so that incident radiation reaches them after passing through the display screen 14. By way of example, the photodetectors are positioned at the interstices between the display pixels of the light-emitting layer 16 in order to receive a light radiation passing as the display pixels. The photodetectors can be covered with a transparent protective coating, not shown. The image sensor 22 further comprises conductive tracks and switching elements, in particular transistors, not shown, allowing the selection of the photodetectors. The photodetectors can be made of organic materials. The photodetectors can correspond to organic photodiodes (OPD, from the English Organic Photodiode) or to organic photoresistors.
    By way of example, the image sensor 12 can be used to detect the fingerprint of at least one finger of a user. Preferably, the image sensor 12 can be used to simultaneously detect the fingerprints of several fingers of the user. According to one embodiment, the image sensor 12 can play the role of a tactile surface, in which the location of an object or organ on the display and detection system 10 is determined by the
    B16386 photodetectors. The display and detection system 10 can then be used as an interactive user interface which can be controlled by simply sliding the finger or the hand on the touch surface. Such an interactive user interface can be used in particular to control mobile phones, computers, television sets, motor vehicles, automatic ticketing, industrial equipment, medical equipment, etc.
    The display and detection system 10 further comprises a transparent protective coating 24 resting on and in contact with the anti-reflection system 20. This coating is transparent to visible light and to infrared. The protective coating 24 is for example a glass slide or a transparent layer of a polymer.
    According to a first mode of operation, an object or organ, for example a finger, can be illuminated by a source external to the display and detection system which emits radiation which passes through or is reflected by the object or organ. The object or organ then emits unpolarized light radiation in the direction of the photodetectors of the image sensor 22. This unpolarized radiation crosses the polarizer 5 and 50% of its intensity is lost.
    According to a second mode of operation, the object or the organ is not lit by an external source, it is then lit by non-polarized light radiation emitted by the photoemitting layer 16 of the display screen 12. The light radiation polarizes and loses part of its intensity when passing through polarizer 5. This light radiation is reflected on the object or organ and is reflected. The reflected radiation passes through the polarizer 5 and again loses part of its intensity.
    Thus, a drawback of this display and detection system 10 is that the polarizer 5 of the anti-reflection system 20 decreases the brightness of the image of the object or organ on the image sensor 22.
    B16386
    FIG. 3 is a simplified diagram of an embodiment of a display and detection system 30 adapted to detect an image, for example a fingerprint. The display and detection system 30 comprises some of the elements of the display and detection system 10 described in relation to FIG. 2, namely the display screen 12, comprising the substrate 14, the light emitting layer 16 and the encapsulation layer 18, the image sensor 22 and a transparent layer 24.
    The display and detection system 30 further comprises an anti-reflection system 32 comprising the quarter-wave plate 7 described in relation to FIG. 2 and an electrically controllable rectilinear polarizer 34. An electrically controllable rectilinear polarizer is a polarizer which, under the influence of an electric field, can either become polarizing or lose its polarizing character.
    An example of an electrically controllable rectilinear polarizer is a liquid crystal polarizer. Liquid crystals are sensitive to the influence of an electric field. In the case of nematic liquid crystals, the liquid crystals are not polarizing at rest. When an electric field is applied to them, the liquid crystals organize and become polarizing. In the case of cholesteric liquid crystals, the liquid crystals are polarizing at rest. When applied to an electric field, liquid crystals lose their polarizing nature.
    It is then possible to provide a control circuit for the rectilinear polarizer 34. This control circuit can comprise a switch which, depending on the type of liquid crystal constituting the polarizer, opens or closes to apply or not an electric field to the rectilinear polarizer 34 This switch can be controlled manually or by a signal sent each time one wishes to use the image sensor, for example to acquire a fingerprint.
    B16386
    An advantage of this embodiment is that one can activate or deactivate the rectilinear polarizer 34 at will. When it is desired to use the image sensor, the rectilinear polarizer 34 is deactivated so that it no longer polarizes the light passing through it. In the case of a nematic liquid crystal polarizer, the deactivation of the straight polarizer 34 is obtained by interrupting the application of an electric field on the liquid crystals so that they lose their polarizing character. In the case of a choiesteric liquid crystal polarizer, the deactivation of the rectilinear polarizer 34 is obtained by subjecting the liquid crystals to an electric field so that they lose their polarizing character. The brightness of the image produced by the sensor is then not reduced by the rectilinear polarizer 34.
    When it is desired to use the display screen 12 alone without the image sensor 22, the rectilinear polarizer 34 is activated so that it polarizes the light passing through it. The anti-reflection system 32 then operates like that described in relation to FIG. 1 and eliminates any reflections from the display and detection system 30.
    Particular embodiments have been described. Various variants and modifications will appear to those skilled in the art. In particular, the light intensity of the screen can be adapted to each activation or deactivation of the rectilinear polarizer 34 in order to comply with the standards on the maximum illumination of a screen.
    The display and detection system may include a touch surface in addition to the image sensor 22 which may then be dedicated to the acquisition of fingerprints.
    In the embodiments described above, the display screen 12 covers the image sensor 22. As a variant, the image sensor can be formed directly at the level of the emitting layer in the display screen , for example by placing the photodetectors in the interstices between the display pixels in the light emitting layer 16.
    B16386
    In addition, the display and detection system may further comprise an angular filter disposed between the display screen 12 and the image sensor 22. The angular filter is adapted to filter the incident radiation as a function of the incidence of the radiation relative to the upper face of the angular filter, in particular so that the image sensor 22 receives only the rays whose incidence relative to an axis perpendicular to the upper face of the angular filter is less than an angle of incidence maximum less than 45 °, preferably less than 30 °, more preferably less than 20 °, even more preferably less than 10 °. The angular filter 16 is adapted to block the rays of the indicative radiation whose incidence relative to an axis perpendicular to the upper face of the angular filter is less is greater than the maximum angle of incidence. The angular filter can comprise a matrix of holes delimited by walls opaque to said radiation.
    Various embodiments with various variants have been described above. Note that those skilled in the art can combine various elements of these various embodiments and variants without showing inventive step.
    权利要求:
    Claims (12)
    [1" id="c-fr-0001]
    1. Display and detection system (30) comprising:
    an image sensor (22);
    a display screen (12); and an anti-reflection system (32) covering the display screen (12) and the image sensor (22), said anti-reflection system comprising an electrically controllable rectilinear polarizer (34).
    [2" id="c-fr-0002]
    2. Display and detection system (30) according to claim 1, in which the anti-reflection system (32) further comprises a quarter wave plate (7).
    3. System display and of detection according to claim 1 or 2, in which the polarizer straight electrically controllable (34) East a polarizer crystal liquids. 4. System display and of detection according to one any of claims 1 at 3 in which the screen
    display (12) covers the image sensor (22).
    [3" id="c-fr-0003]
    5. Display and detection system according to any one of claims 1 to 4, in which the display screen (12) comprises a photoemitting layer (16) and an encapsulation layer (18) covering the layer. photoemitter (16).
    [4" id="c-fr-0004]
    6. Display and detection system according to claim 5, in which the photoemitting layer (16) is an OLED type layer.
    [5" id="c-fr-0005]
    7. Display and detection system according to claim 5 or 6, wherein the display screen (12) comprises a transparent substrate (14) on which the photoemitting layer (16) rests.
    [6" id="c-fr-0006]
    8. Display and detection system according to any one of claims 1 to 7, in which the anti-reflection system (32) is covered with a transparent coating (24).
    B16386
    [7" id="c-fr-0007]
    9. Display and detection system according to claim 8, in which the transparent coating (24) is made of glass.
    [8" id="c-fr-0008]
    10. Display and detection system according to any one of claims 1 to 9, in which the image sensor (22) comprises an array of organic sensors.
    [9" id="c-fr-0009]
    11. Display and detection system according to any one of claims 1 to 10, further comprising an angular filter, between the image sensor (22) and the display screen (12), adapted to block incident rays whose incidence relative to a direction orthogonal to one face of the angle filter is greater than a threshold and to allow at least certain incident rays to pass through which the incidence relative to a direction orthogonal to the face is less threshold.
    [10" id="c-fr-0010]
    12. Use of the display and detection system according to any one of claims 1 to 11 for the detection of at least one fingerprint of a user.
    [11" id="c-fr-0011]
    13. Use according to claim 12, in which the image sensor (22) acts as a tactile surface.
    [12" id="c-fr-0012]
    14. A method of controlling the display and detection system (30) according to any one of claims 1 to 11, in which the electrically controllable rectilinear polarizer (34) is deactivated each time the image sensor (22) is used. .
    类似技术:
    公开号 | 公开日 | 专利标题
    EP3441859B1|2021-12-29|Display and detection system
    EP3442025A1|2019-02-13|Display system comprising an image sensor
    TWI448782B|2014-08-11|Display
    US10627556B2|2020-04-21|Electronic devices with optical component windows
    WO2015044354A1|2015-04-02|Adaptive optical filter for spectacle lenses
    USRE47503E1|2019-07-09|Photodetectors useful as ambient light sensors and methods for use in manufacturing the same
    EP2530564A2|2012-12-05|Touch system with optical transmitters and receivers
    US20180073924A1|2018-03-15|Optoelectronic module for spectral and proximity data acquisition
    WO2017108881A1|2017-06-29|Oled-illuminated print sensor
    EP2895938A1|2015-07-22|Non-contact user interface system
    FR3066619A1|2018-11-23|AIRCRAFT DISPLAY SYSTEM
    EP3627210A1|2020-03-25|System for viewing in virtual or augmented reality with eye image sensor, and associated method
    US20210098962A1|2021-04-01|Vertical cavity surface-emitting laser | with a light barrier
    EP2808724B1|2016-04-06|Display assembly of the augmented-reality type
    FR2958426A1|2011-10-07|Interactive display i.e. multi-point and multi-user interactive display, for interactive system, has infrared matrix sensor comprising two sets of infrared detectors respectively to discriminate between wavelengths
    WO2022038033A1|2022-02-24|System for acquiring images
    WO2021014055A1|2021-01-28|Communicating backlighting device for a screen and electronic system comprising a screen backlit by such a device
    FR3001064A1|2014-07-18|SYSTEM AND METHOD FOR DETECTING THE POSITION OF AN ACTUATION MEMBER ON A DISPLAY SCREEN
    FR3061595A1|2018-07-06|SYSTEM FOR COMMUNICATING INFORMATION TO A USER CLOSE TO A MOTOR VEHICLE
    同族专利:
    公开号 | 公开日
    US20200257397A1|2020-08-13|
    FR3070095B1|2019-09-06|
    JP2019035955A|2019-03-07|
    KR20190017685A|2019-02-20|
    US10782809B2|2020-09-22|
    EP3441859A1|2019-02-13|
    EP3441859B1|2021-12-29|
    CN109389942A|2019-02-26|
    US20190050095A1|2019-02-14|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US9647041B2|2013-11-12|2017-05-09|Tpk Touch Solutions Inc.|Organic light emitting diode touch display device|
    EP3012865A1|2014-10-21|2016-04-27|Samsung Display Co., Ltd.|Display panel and display device having the same|
    US20170069692A1|2015-09-07|2017-03-09|Lg Display Co., Ltd.|Organic light emitting display device and method of manufacturing the same|
    US6573963B2|2001-02-22|2003-06-03|3M Innovativeproperties Company|Cholesteric liquid crystal optical bodies and methods of manufacture|
    JP4867766B2|2007-04-05|2012-02-01|セイコーエプソン株式会社|Liquid crystal device, image sensor, and electronic device|
    TWI447486B|2011-11-18|2014-08-01|Au Optronics Corp|Organic light emitting device|
    KR101376228B1|2013-07-17|2014-04-01|실리콘 디스플레이 |Fingerprint sensor capable of sensing fingerprint by optical method and capacitive method|
    US20150095816A1|2013-09-29|2015-04-02|Yang Pan|User Interface of an Electronic Apparatus for Adjusting Dynamically Sizes of Displayed Items|
    US9570002B2|2014-06-17|2017-02-14|Apple Inc.|Interactive display panel with IR diodes|
    KR20180088808A|2015-11-30|2018-08-07|니폰 제온 가부시키가이샤|Double layer film, manufacturing method, circular polarizer, anti-reflection film and organic electroluminescence display device|
    CN109416732A|2016-06-28|2019-03-01|比杨德艾斯公司|It is able to detect the display of fingerprint|
    CN106709455B|2016-12-23|2020-06-30|张一帆|Display screen supporting full-screen optical fingerprint sensor and manufacturing method thereof|
    FR3070094B1|2017-08-11|2019-09-06|Isorg|DISPLAY SYSTEM COMPRISING AN IMAGE SENSOR|FR3063564B1|2017-03-06|2021-05-28|Isorg|INTEGRATED FINGERPRINT SENSOR IN A DISPLAY SCREEN|
    US10914976B2|2017-12-01|2021-02-09|Innolux Corporation|Electronic device|
    US20190294851A1|2018-03-26|2019-09-26|Samsung Electronics Co., Ltd.|Display panel for providing sensing light to optical fingerprint sensor and fingerprint sensing system including thereof|
    KR20190125558A|2018-04-27|2019-11-07|삼성디스플레이 주식회사|Display apparatus|
    FR3094140A1|2019-03-22|2020-09-25|Isorg|IMAGE SENSOR INCLUDING ANGULAR FILTER|
    法律状态:
    2019-02-15| PLSC| Publication of the preliminary search report|Effective date: 20190215 |
    2019-08-26| PLFP| Fee payment|Year of fee payment: 3 |
    2020-08-26| PLFP| Fee payment|Year of fee payment: 4 |
    2021-02-12| CA| Change of address|Effective date: 20210107 |
    2021-08-30| PLFP| Fee payment|Year of fee payment: 5 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1757672A|FR3070095B1|2017-08-11|2017-08-11|DISPLAY AND DETECTION SYSTEM|
    FR1757672|2017-08-11|FR1757672A| FR3070095B1|2017-08-11|2017-08-11|DISPLAY AND DETECTION SYSTEM|
    EP18186413.3A| EP3441859B1|2017-08-11|2018-07-30|Display and detection system|
    JP2018146977A| JP2019035955A|2017-08-11|2018-08-03|Display/detection system|
    US16/058,452| US10782809B2|2017-08-11|2018-08-08|Display and detection system|
    KR1020180093218A| KR20190017685A|2017-08-11|2018-08-09|Display and detection system|
    CN201810906266.0A| CN109389942A|2017-08-11|2018-08-10|Display and detection system|
    US16/862,425| US20200257397A1|2017-08-11|2020-04-29|Display and detection system|
    [返回顶部]