WO2020140279A1 - 显示面板及其操作方法 - Google Patents

显示面板及其操作方法 Download PDF

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Publication number
WO2020140279A1
WO2020140279A1 PCT/CN2019/070457 CN2019070457W WO2020140279A1 WO 2020140279 A1 WO2020140279 A1 WO 2020140279A1 CN 2019070457 W CN2019070457 W CN 2019070457W WO 2020140279 A1 WO2020140279 A1 WO 2020140279A1
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WIPO (PCT)
Prior art keywords
light
emitting device
photosensitive element
display panel
display
Prior art date
Application number
PCT/CN2019/070457
Other languages
English (en)
French (fr)
Inventor
胡伟频
卜倩倩
姜明宵
杨照坤
苏亚龙
张平奇
张晨阳
马龙飞
张慧
Original Assignee
京东方科技集团股份有限公司
北京京东方显示技术有限公司
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Application filed by 京东方科技集团股份有限公司, 北京京东方显示技术有限公司 filed Critical 京东方科技集团股份有限公司
Priority to CN201980000032.2A priority Critical patent/CN110972506B/zh
Priority to US16/633,181 priority patent/US11296155B2/en
Priority to PCT/CN2019/070457 priority patent/WO2020140279A1/zh
Publication of WO2020140279A1 publication Critical patent/WO2020140279A1/zh

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    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/60—OLEDs integrated with inorganic light-sensitive elements, e.g. with inorganic solar cells or inorganic photodiodes
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/02—Details
    • H01L31/0232—Optical elements or arrangements associated with the device
    • H01L31/02327—Optical elements or arrangements associated with the device the optical elements being integrated or being directly associated to the device, e.g. back reflectors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/12—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof structurally associated with, e.g. formed in or on a common substrate with, one or more electric light sources, e.g. electroluminescent light sources, and electrically or optically coupled thereto
    • H01L31/125—Composite devices with photosensitive elements and electroluminescent elements within one single body
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/12—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof structurally associated with, e.g. formed in or on a common substrate with, one or more electric light sources, e.g. electroluminescent light sources, and electrically or optically coupled thereto
    • H01L31/14—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof structurally associated with, e.g. formed in or on a common substrate with, one or more electric light sources, e.g. electroluminescent light sources, and electrically or optically coupled thereto the light source or sources being controlled by the semiconductor device sensitive to radiation, e.g. image converters, image amplifiers or image storage devices
    • H01L31/147—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof structurally associated with, e.g. formed in or on a common substrate with, one or more electric light sources, e.g. electroluminescent light sources, and electrically or optically coupled thereto the light source or sources being controlled by the semiconductor device sensitive to radiation, e.g. image converters, image amplifiers or image storage devices the light sources and the devices sensitive to radiation all being semiconductor devices characterised by potential barriers
    • H01L31/153—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof structurally associated with, e.g. formed in or on a common substrate with, one or more electric light sources, e.g. electroluminescent light sources, and electrically or optically coupled thereto the light source or sources being controlled by the semiconductor device sensitive to radiation, e.g. image converters, image amplifiers or image storage devices the light sources and the devices sensitive to radiation all being semiconductor devices characterised by potential barriers formed in, or on, a common substrate
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/12—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof structurally associated with, e.g. formed in or on a common substrate with, one or more electric light sources, e.g. electroluminescent light sources, and electrically or optically coupled thereto
    • H01L31/16—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof structurally associated with, e.g. formed in or on a common substrate with, one or more electric light sources, e.g. electroluminescent light sources, and electrically or optically coupled thereto the semiconductor device sensitive to radiation being controlled by the light source or sources
    • H01L31/167—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof structurally associated with, e.g. formed in or on a common substrate with, one or more electric light sources, e.g. electroluminescent light sources, and electrically or optically coupled thereto the semiconductor device sensitive to radiation being controlled by the light source or sources the light sources and the devices sensitive to radiation all being semiconductor devices characterised by potential barriers
    • H01L31/173—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof structurally associated with, e.g. formed in or on a common substrate with, one or more electric light sources, e.g. electroluminescent light sources, and electrically or optically coupled thereto the semiconductor device sensitive to radiation being controlled by the light source or sources the light sources and the devices sensitive to radiation all being semiconductor devices characterised by potential barriers formed in, or on, a common substrate
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/10—OLED displays
    • H10K59/12—Active-matrix OLED [AMOLED] displays
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
    • G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
    • G06V40/12—Fingerprints or palmprints
    • G06V40/13—Sensors therefor
    • G06V40/1318—Sensors therefor using electro-optical elements or layers, e.g. electroluminescent sensing
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0233—Improving the luminance or brightness uniformity across the screen
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/04—Maintaining the quality of display appearance
    • G09G2320/043—Preventing or counteracting the effects of ageing
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/04—Maintaining the quality of display appearance
    • G09G2320/043—Preventing or counteracting the effects of ageing
    • G09G2320/045—Compensation of drifts in the characteristics of light emitting or modulating elements
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2354/00—Aspects of interface with display user
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/10—Intensity circuits

Definitions

  • At least one embodiment of the present disclosure relates to a display panel and an operation method thereof.
  • At least one embodiment of the present disclosure provides a display panel having a display side and a non-display side opposite to the display side, and at least one first pixel area and at least one second pixel area.
  • the first pixel area includes a first light emitting device and a first photosensitive element sequentially arranged along the direction from the display side to the non-display side
  • the second pixel area includes a direction from the display side to the non-display side
  • the second light emitting device and the second photosensitive element are arranged in this order.
  • the second light emitting device is configured to emit second light toward the non-display side
  • the second light receiving element is configured to allow the second light to enter and detect
  • the first light emitting device and the second light emitting The device is configured to emit a first light to the display side
  • the first photosensitive element is configured to allow the first light reflected by an external object to enter and detect, the second light is different from the first light .
  • the first pixel area includes a plurality of the first light emitting devices and one first photosensitive element; and/or the second pixel area includes a plurality of Each of the second light emitting devices and one of the second photosensitive elements.
  • the display panel includes a plurality of the first pixel regions and a plurality of the second pixel regions, the plurality of first pixel regions and the multiple The second pixel areas are alternately arranged in the first direction of the display panel.
  • the first light-emitting device includes a first light-emitting driving upper electrode, a first light-emitting layer, and a second light-emitting device that are sequentially stacked from the display side to the non-display side A light-emitting driving lower electrode; and the second light-emitting device includes a second light-emitting driving upper electrode, a second light-emitting layer, and a second light-emitting driving lower electrode sequentially stacked from the display side to the non-display side.
  • the second light-emitting driving lower electrode is configured as a metal grating having a second polarization direction to reflect light in a first polarization direction perpendicular to the second polarization direction ,
  • the second light has the second polarization direction.
  • the second photosensitive element includes a metal grating having the second polarization direction disposed toward a side of the second light emitting device.
  • the first photosensitive element includes a metal grating having the first polarization direction disposed toward a side of the first light emitting device.
  • the second light-emitting driving upper electrode is configured as a metal grating having the first polarization direction, and the first light emitted from the second light-emitting device has The first polarization direction.
  • the first light-emitting driving upper electrode is configured as a metal grating with the first polarization direction, and the first light emitted from the second light-emitting device has The first polarization direction.
  • the first light-emitting driving lower electrode is configured as a metal grating having the first polarization direction.
  • the light emitted by the first light emitting device is away from the first photosensitive element.
  • the first pixel area includes a display portion and a non-display portion
  • the first light emitting device is located in the display portion
  • the first light emitting drive lower electrode configuration It is a reflective electrode
  • the first photosensitive element is at least partially located in the non-display portion or overlaps the edge of the display portion in a direction from the display side to the non-display side.
  • the display panel provided by at least one embodiment of the present disclosure further includes a first base substrate, the first light emitting device and the second light emitting device are located on the first base substrate, the first light emitting device and The side of the second light emitting device facing away from the first base substrate is the display side.
  • the first photosensitive element and the second photosensitive element are located on the first base substrate; or the display panel further includes A second base substrate on a side of the base substrate facing away from the first light emitting device, the first photosensitive element and the second photosensitive element are located on the second base substrate.
  • the display panel provided by at least one embodiment of the present disclosure further includes a first base substrate, the first light emitting device and the second light emitting device are located on the first base substrate, and the first base substrate The side facing away from the first light emitting device and the second light emitting device is the display side.
  • the first photosensitive element and the second photosensitive element are located on the first base substrate; or the display panel further includes A second base substrate of a side of the light emitting device facing away from the first base substrate, the first photosensitive element and the second photosensitive element are located on the second base substrate.
  • the first photosensitive element and the second photosensitive element include at least one of a photodiode and a phototransistor.
  • At least one embodiment of the present disclosure provides an operation method of a display panel provided according to any of the above embodiments, including: in a first state, causing the first light emitting device and the second light emitting device to emit light, and causing the second The photosensitive element detects the incidence of the incident second light, and the first light forms a display image; in the second state, at least the second light emitting device emits light, and the second photosensitive element is incident to The second light is detected, and the first light emitted by the second light emitting device is reflected by an external object and at least partially enters the first photosensitive element.
  • the first light emitting device in the second state, is controlled not to emit light.
  • 1A is a plan view of a display panel provided by some embodiments of the present disclosure.
  • FIG. 1B is a cross-sectional view of the display panel shown in FIG. 1A along line I-I in one state;
  • FIG. 1C is a cross-sectional view along line I-I of the display panel shown in FIG. 1A in another state;
  • FIG. 2A is a partial cross-sectional view of a display panel in a state provided by some embodiments of the present disclosure
  • 2B is a partial cross-sectional view of a display panel in a state provided by some embodiments of the present disclosure
  • FIG. 3 is a partial cross-sectional view of another display panel provided by some embodiments of the present disclosure.
  • FIG. 4 is a partial cross-sectional view of another display panel provided by some embodiments of the present disclosure.
  • FIG. 5 is a partial cross-sectional view of another display panel provided by some embodiments of the present disclosure.
  • FIG. 6 is a partial cross-sectional view of another display panel provided by some embodiments of the present disclosure.
  • the pixel circuit includes a light emitting device (such as OLED (Organic Light-Emitting Diode, organic light emitting diode)), thin film transistor (Thin Film Transistor, TFT), storage capacitor, and the like.
  • a light emitting device such as OLED (Organic Light-Emitting Diode, organic light emitting diode)
  • TFT Thin Film Transistor
  • the pixel circuit can control whether the TFT is turned on by a fixed gate scanning signal to charge the voltage corresponding to the display data to the storage capacitor, and control the display of the display unit by the magnitude of the voltage, Furthermore, the light emitting brightness of the display unit is adjusted.
  • the process stability of TFT is the main factor affecting the display of the display screen. Due to the deviation of the manufacturing process of the TFT, there is a characteristic difference between the threshold voltage Vth and the mobility of each driving TFT in multiple pixel circuits, so that the brightness deviation between each pixel occurs, resulting in a decrease in the brightness uniformity of the display screen, and even Area spots or patterns. On the other hand, light-emitting devices made of organic materials will gradually age with use time and are not recoverable, and light-emitting devices in areas that have been lit for a long time will age faster, resulting in afterimages on the display screen. Therefore, in order to solve the technical problems regarding brightness uniformity and afterimage in the display device, in addition to the improvement of the process of the thin film transistor, compensation techniques have also been proposed, for example, including pixel compensation (ie, internal compensation) and external compensation.
  • pixel compensation ie, internal compensation
  • external compensation external compensation
  • pixel compensation cannot satisfy all backplane technologies, it needs to be improved through external compensation.
  • large-size display panels usually compensate pixel circuits by combining electrical compensation and optical compensation.
  • This method can integrate the advantages of electrical compensation and optical compensation to improve the uniformity of the display panel.
  • electrical compensation can determine the compensation data by sensing the voltage or current of the pixel circuit obtained by the signal line to compensate for the characteristics of the driving TFT (for example, threshold voltage and mobility, etc.); optical compensation can compensate the display as a whole
  • the uniformity of the panel is compensated by optical compensation. Therefore, it can effectively compensate for display problems caused by various reasons, such as solving the Mura phenomenon generated in the device manufacturing process, and optical compensation. It can also be performed in real time, so that the actual light emission brightness can be accurately adjusted to the preset brightness.
  • the detection device detects the actual light-emitting brightness of the display panel. At this time, the detected brightness is not the actual light-emitting brightness of the light-emitting device of the pixel. Therefore, if brightness compensation is performed, the actual light-emitting brightness after the display panel is adjusted deviates from the preset brightness, and thus cannot Realize real-time brightness compensation. That is, in this case, the interference between the light used for fingerprint recognition and brightness compensation is severe, resulting in poor accuracy of fingerprint recognition, and the compensation effect may also be deteriorated.
  • At least one embodiment of the present disclosure provides a display panel.
  • the display panel has a display side and a non-display side opposite to the display side, and includes at least one first pixel area and at least one second pixel area.
  • the first pixel area includes a first light emitting device and a first photosensitive element sequentially arranged in a direction from a display side to a non-display side
  • a second pixel area includes a second light emitting device and a second photosensitive element sequentially arranged in a direction from a display side to a non-display side element.
  • the second light emitting device is configured to emit the second light toward the non-display side
  • the second photosensitive element is configured to allow the second light to enter and perform detection
  • the first light emitting device and the second light emitting device are configured to emit the first light toward the display side.
  • a photosensitive element is configured to allow the first light reflected by the external object to enter and be detected, and the second light is different from the first light.
  • different types of light rays may be that different light rays have different polarization states or have different polarization directions under the same polarization state.
  • the types of light rays may include linearly polarized light, partially polarized light, circularly polarized light, and elliptically polarized light.
  • both the second ray and the first ray are linearly polarized, but the polarization directions of the second ray and the first ray are different (for example, perpendicular to each other).
  • the first light emitted by the first light emitting device and the second light emitting device may be used to form a display image; without interference from external objects, the second light emitted by the second light emitting device enters the first Two photosensitive elements, so that the second photosensitive element can at least detect the actual light-emitting brightness of the second light-emitting device, and accordingly, real-time brightness compensation can be performed on the second area.
  • the recognition mode when an external object (such as a finger, palm, etc.) approaches, the first light emitted by the second light-emitting device is reflected by the finger and carries fingerprint information (brightness information) and enters the first photosensitive element, so that the first photosensitive element Fingerprint images can be acquired for fingerprint recognition.
  • the first photosensitive element and the second photosensitive element respectively receive first light and second light of different types, thereby reducing the interference of light used for fingerprint recognition and brightness compensation, and eliminating or reducing The interference of the light reflected by the external object on the second photosensitive element improves the accuracy of brightness compensation, and thus the accuracy of fingerprint recognition.
  • the external object to be identified may be an object with skin texture or other types of objects such as fingers and palms identified by optical detection.
  • the fingerprint of the external object to be recognized is taken as an example for description.
  • FIG. 1A is a plan view of a display panel provided by an embodiment of the present disclosure
  • FIG. 1B is a cross-sectional view of the display panel shown in FIG. 1A along line II in a state
  • FIG. 1C is a display panel shown in FIG. A cross-sectional view along line II in one state.
  • the display panel shown in FIG. 1B is in the display mode
  • the display panel shown in FIG. 1C is in the recognition mode.
  • the finger is not close to (eg, not touching) the display surface of the display panel, and all the light emitted by the sub-pixels is used to form a display image
  • the recognition mode the finger is close to (eg, touching) the display surface of the display panel to Perform fingerprint recognition.
  • the light-emitting device eg, the first light-emitting device 110
  • the light-emitting device is also provided with an encapsulation layer, an optical film, a cover plate, or other elements. Therefore, even if a finger has been pressed on the display surface of the display panel, As shown in FIG. 1, the fingerprint of the finger 1 and the light emitting device are still spaced from each other.
  • the display panel includes multiple rows and multiple columns of pixel units.
  • each pixel unit includes four color sub-pixels, in order of a red sub-pixel R, a green sub-pixel G, a blue sub-pixel B, and a white sub-pixel W, the four sub-pixels being arranged in a row.
  • each sub-pixel occupies one pixel area.
  • each pixel unit may include a red pixel R, a green pixel G, a blue pixel B but not a white pixel W, and for example, each pixel unit may include a red pixel R, green pixel G, blue pixel B, yellow pixel Y, etc.
  • the display panel has at least one first pixel area 101 and at least one second pixel area 102, the first pixel area includes the first light emitting device 110 and the first photosensitive element 210, and the second pixel area 102
  • the second light emitting device 120 and the second photosensitive element 220 are included, and the side of the first light emitting device 110 facing away from the first photosensitive element 210 is the display side (the upper side in the figure), and the side of the first photosensitive element 210 facing away from the first light emitting
  • the side of the device 110 is the non-display side
  • the side of the second light emitting device 120 facing away from the second photosensitive element 220 is the display side
  • the side of the second light emitting element 220 facing away from the second light emitting device 120 is the non-display side (FIG. Lower side).
  • the embodiments of the present disclosure have no limitation on the color of light emitted by the first pixel area 101 and the second pixel area 102. Meanwhile, the embodiments of the present disclosure do not limit the types and specific structures of the light-emitting element and the photosensitive element, for example, the light-emitting element may be an organic light-emitting element, a quantum dot light-emitting element, etc.
  • the photosensitive element may be a photodiode, a photosensitive transistor, or the like.
  • the first light-emitting device 110 and the second light-emitting device 120 emit first light (dashed arrow " ⁇ ") to form a display image so that a user on the display side can view the display image
  • the second light emitted by the second light emitting device 120 enters the second photosensitive element 220 for brightness compensation.
  • the user's finger 1 approaches the display panel, for example, touches the display side surface of the display panel, and the second light emitted by the second light emitting device 120 enters the second photosensitive element 220 for brightness compensation.
  • the first light emitted by the first light emitting device 110 and the second light emitter 120 is reflected by the fingerprint of the finger 1 and enters the first photosensitive element 210.
  • the first photosensitive element 210 detects the brightness of the first light to perform fingerprint identification.
  • the display surface of the display panel has a display area for displaying an image, and at least part of the display area may serve as a fingerprint recognition area.
  • all of the display area of the display panel serves as a fingerprint recognition area, and all of the display area is composed of the first pixel area 101 and the second pixel area 102 as shown in FIGS. 1B and 1C.
  • the first pixel area 101 and the second pixel area 102 are evenly distributed in the display area of the display panel, so that the display panel has the functions of full-screen fingerprint recognition and brightness compensation.
  • a portion of the display area of the display panel serves as a fingerprint recognition area, which is composed of the first pixel area 101 and the second pixel area 102 as shown in FIGS. 1B and 1C.
  • the first pixel area 101 and the second pixel area 102 are evenly distributed in the fingerprint identification area, so that the fingerprint identification area of the display panel has the functions of fingerprint identification and brightness compensation.
  • the first pixel area and the second pixel area may display an image as shown in FIG. 1B.
  • the display panel provided by at least one embodiment of the present disclosure includes a plurality of first pixel regions and a plurality of second pixel regions, the plurality of first pixel regions and the plurality of second pixel regions are alternately arranged in the first direction of the display panel cloth.
  • the first pixel regions 101 and the second pixel regions 102 are alternately arranged along the first direction (for example, the X-axis direction). For example, every two adjacent first pixel regions 101 and second pixel regions 102 form a group.
  • the first light emitted from the second pixel region 102 is reflected by the finger 1 and enters the same group of first The photosensitive element 210 (refer to the relevant description of the embodiment shown in FIG. 3), and basically does not enter the first group of the first photosensitive element 210, so as to prevent the first light reflected at different positions of the finger 1 from entering the same first
  • the photosensitive element 210 causes crosstalk in fingerprint recognition.
  • the number correspondence relationship between the photosensitive elements (first photosensitive element, second photosensitive element) and the light emitting devices (first light emitting device, second light emitting device) is not limited.
  • Each photosensitive element may correspond to one light emitting device, or may correspond to multiple light emitting devices.
  • the first pixel area 101 includes one first light emitting device 110 and one first photosensitive element 210
  • the second pixel area 102 includes one second light emitting device 210 and one second photosensitive element 220, that is, the first pixel area 101 and the second pixel area 102 respectively correspond to one sub-pixel.
  • the fingerprint recognition accuracy of the display panels of these embodiments is high, and each photosensitive element (such as the second photosensitive element or the first photosensitive element and the second photosensitive element of the embodiment shown in 2A) can be used to detect a sub
  • the luminous brightness of pixels improves the effect of brightness compensation.
  • the first pixel area includes a plurality of first light emitting devices and a first photosensitive element
  • the second pixel area includes a plurality of second light emitting devices and a first
  • the two photosensitive elements that is, the first pixel area and/or the second pixel area correspond to a plurality of sub-pixels.
  • a defective region usually includes multiple sub-pixels; and because the area of the fingerprint relative to the sub-pixels is large, In the fingerprint recognition area, even if the number of photosensitive elements used for fingerprint recognition is smaller than the number of sub-pixels, fingerprint images can be acquired for fingerprint recognition. In this way, for a region where multiple sub-pixels are located, setting one photosensitive element can perform brightness detection or detect sufficient fingerprint information, so the number of photosensitive elements (first photosensitive element and second photosensitive element) is small, simplifying the structure of the display panel, cut costs.
  • the first light emitting device 110 in the fingerprint coverage area may be turned off, thereby preventing the light emitted by the first light emitting device 110 from interfering with fingerprint recognition. If the first light emitting device 110 is turned on, the light emitted by the fingerprint will be reflected by the fingerprint and enter the first photosensitive element 210, causing the first photosensitive element 210 to receive the reflected light at different positions of the fingerprint and interfere with fingerprint recognition; in addition, the light is fingerprinted The reflection may enter the second light-sensing element 220 in the adjacent sub-pixel.
  • the second light-emitting device 120 interferes with the brightness detection of the second light-emitting device 120 by the second light-sensing element 220 (for example, the detection value is too high).
  • the actual light emitting brightness of the two light emitting devices 120 is adjusted to deviate from the preset brightness (for example, the actual light emitting brightness is too small), that is, the brightness of the first light emitted by the second light emitting device 220 for fingerprint recognition deviates from the preset value, resulting in fingerprint recognition 'S accuracy is poor.
  • FIG. 2A is a partial cross-sectional view of a display panel in a state provided by an embodiment of the present disclosure
  • FIG. 2B is a partial cross-sectional view of a display panel in a state provided by an embodiment of the present disclosure, for example, respectively This corresponds to the display panel shown in FIGS. 1B and 1C.
  • the display panel shown in FIG. 2A is in the display mode
  • the display panel shown in FIG. 2B is in the recognition mode.
  • the first light-emitting device includes a first light-emitting driving upper electrode, a first light-emitting layer, and a first light-emitting driving lower electrode that are sequentially stacked from the display side to the non-display side;
  • the second light emitting device includes a second light-emitting driving upper electrode, a second light-emitting layer, and a second light-emitting driving lower electrode that are sequentially stacked from the display side to the non-display side.
  • the first light emitting device 110 includes a stacked first light emitting driving upper electrode 111, a first light emitting layer 112, and a first light emitting driving lower electrode 113;
  • the second light emitting device 120 includes a stacked second light emitting driving upper electrode 121, a second light emitting layer 122, and a second light emitting driving lower electrode 123.
  • the light emitting device (first light emitting device 110, second light emitting device 120) may be an organic light emitting device or quantum dot light emitting device, and the light emitting layer (first light emitting layer 112, second light emitting layer 122) may be an organic light emitting layer or quantum Dot light emitting layer, one of the light emitting driving upper electrode (first light emitting driving upper electrode 111, the second light emitting driving upper electrode 121) and the light emitting driving lower electrode (first light emitting driving lower electrode 113, second light emitting driving lower electrode 123) is The anode is the cathode.
  • the light emitting device may be an organic light emitting diode (OLED) or a quantum dot light emitting diode (PLED) light emitting device, or the like.
  • the light-emitting layer (first light-emitting layer, second light-emitting layer) of the light-emitting device is configured to emit light of different colors, such as red light, green light, blue light, yellow light, white light, etc.; for example, a light-emitting device of multiple pixel areas
  • the light-emitting layer is configured to be integrated to emit light of the same color, such as white light, blue light, yellow light, or light of other colors.
  • the light emitted by the light-emitting layer of the light-emitting device is natural light, and the natural light can be converted into polarized light after passing through the structure of the light-emitting device except the light-emitting layer; the first light or the second light is only a component in one direction of the natural light,
  • the light emitted from the light emitting layer is divided into the first light and the second light, and the light actually used for display is the light composed of the two components including the first light and the second light.
  • the photosensitive element may be a photodiode such as a PIN type photodiode, a PN type photodiode, or other types of photodiodes, or the photosensitive element may be a phototransistor. As shown in FIGS.
  • the first photosensitive element 210 and the second photosensitive element 220 are, for example, PN type or PIN type photodiodes, and from the display side to the non-display side (that is, from the upper side to the lower side in the figure), the first A photosensitive element 210 includes a first photosensitive driving upper electrode 211, a first photosensitive layer 212, and a first photosensitive driving lower electrode 213 that are sequentially stacked, and a second photosensitive element 220 includes a second photosensitive driving upper electrode 221, a second The second photosensitive layer 222 and the second photosensitive driving lower electrode 223.
  • the photosensitive layer (the first photosensitive layer 212 and the second photosensitive layer 222) may include a semiconductor material, and the semiconductor material may be a silicon material. Under the action of light, the photosensitive layer generates photocharges, which can be converted into electrical signals (voltage signals Or current signal), the brightness of the first light incident on the photosensitive element can be detected by the electrical signal.
  • the second light-emitting driving lower electrode is configured as a metal grating with a second polarization direction to transmit light with the second polarization direction and reflect the light perpendicular to the second polarization direction The light of the first polarization direction, whereby the first light rays exiting the display side have the first polarization direction, and the second light rays exiting the non-display side have the second polarization direction.
  • the second light-emitting driving lower electrode 123 is configured as a metal grating having a second polarization direction.
  • the second light has a second polarization direction
  • the first light reflected by the second light-emitting driving lower electrode 123 has a first polarization direction perpendicular to the second polarization direction
  • the first light is After reflection, the fingerprint cannot pass through the second light-emitting driving lower electrode 123 and enter the second photosensitive element 220. Therefore, in the recognition mode, the first light does not interfere with the detection of the second photosensitive element, so the second photosensitive element can detect the actual light emission brightness of the second light emitting device 120 without being affected by the reflected light, thereby ensuring real-time brightness compensation.
  • the second photosensitive driving upper electrode of the second photosensitive element can transmit light
  • the second photosensitive element can detect the light emitting brightness of the second light emitting device, thereby realizing Brightness compensation.
  • the second photosensitive driving upper electrode may be a transparent or semi-transparent electrode, an electrode provided with a via, a metal grating, or the like.
  • the second photosensitive element includes a metal grating having a second polarization direction disposed toward a side of the second light emitting device.
  • the metal grating can be used as the second photosensitive driving upper electrode of the second photosensitive element.
  • the second photosensitive driving upper electrode 221 is provided as a metal grating having a second polarization direction. In this way, the second light having the second polarization direction transmitted through the second light-emitting driving lower electrode 123 will not be absorbed when passing through the second photosensitive driving upper electrode 221, and the brightness will not decrease, so that the second photosensitive element 220 Detection accuracy is high.
  • the second photosensitive driving lower electrode 223 may be configured as a reflective electrode to reflect the second light transmitted through the second photosensitive layer 222 back to the second photosensitive layer 222, thereby improving the second light incident on the second photosensitive element 220
  • the utilization rate of the light source improves the detection accuracy of the second photosensitive element 220.
  • the first light emitted by the second light-emitting device carries fingerprint information (brightness) after being reflected by the fingerprint, as long as the first photosensitive driving upper electrode of the first photosensitive element can transmit light, the carrying fingerprint
  • the first light of the information can be incident on the first photosensitive element, so that the first photosensitive element can acquire a fingerprint image for fingerprint identification.
  • the second photosensitive driving upper electrode may be a transparent or semi-transparent electrode, an electrode provided with a via, a metal grating, or the like.
  • the first photosensitive element includes a metal grating having a first polarization direction disposed toward a side of the first light emitting device.
  • the metal grating can serve as the first photosensitive driving upper electrode of the first photosensitive element.
  • the first photosensitive driving upper electrode 211 is provided as a metal grating having a first polarization direction.
  • the first light emitted from the first light emitting device 110 and the second light emitting device 120 to be reflected by the fingerprint and directed toward the first photosensitive element 210, the first light does not pass through the first photosensitive driving upper electrode 211 It will be absorbed and the brightness will not decrease, so that the transmittance of the first light reflected from the fingerprint to the first photosensitive layer 212 is high, thereby improving the detection accuracy of the first photosensitive element 210.
  • the first photosensitive driving lower electrode 213 may be configured as a reflective electrode to reflect the first light transmitted through the first photosensitive layer 212 back to the first photosensitive layer 212, thereby improving the first light incident on the first photosensitive element 210
  • the utilization rate of the sensor improves the detection accuracy of the first photosensitive element 210.
  • the second light-emitting driving upper electrode is configured as a metal grating with a first polarization direction
  • the first light emitted from the second light-emitting device has a first polarization direction.
  • the second light-emitting driving lower electrode 123 is configured as a metal grating with a second polarization direction
  • the second light-emitting driving upper electrode 121 is a metal grating with a first polarization direction.
  • the interference of the light emitted by the second light emitting device 120 to the display side on the second photosensitive element 220 can be eliminated, and the detection accuracy of the second light emitting element 220 to the brightness of the second light emitting device 120 can be improved, thereby improving the The accuracy of brightness compensation, and further improve the accuracy of fingerprint recognition.
  • the first light-emitting driving upper electrode is configured as a metal grating with a first polarization direction, and the first light emitted from the second light-emitting device has a first polarization direction.
  • the first light-emitting driving upper electrode 111 is provided as a metal grating having a first polarization direction.
  • the first light passes through the first light-emitting drive upper electrode 111, the first light The light can all pass through the first light-emitting drive upper electrode 111 to be incident on the first photosensitive element 210, increasing the transmittance of the first light, thereby improving the detection accuracy of the first photosensitive element 210.
  • the first light-emitting driving upper electrode and the second light-emitting driving upper electrode may be provided as an integrated electrode to serve as a common electrode (eg, a common cathode) of the first light emitting device and the second light emitting device
  • the common electrode is formed as a wire grid in a portion overlapping with the light emitting layer (for example, in the display portion 11), but in other portions (for example, in the non-display portion 12), for example, as a hollow area (opening) to The reflected first light is allowed to enter, so that the manufacturing process of the display panel can be simplified and the cost can be reduced.
  • the first light-emitting driving lower electrode is configured as a metal grating having a first polarization direction.
  • the first light-emitting driving lower electrode 113 of the first light-emitting device 110 is arranged as a metal grating having a first polarization direction.
  • the first light-emitting device 110 may emit the first light having the first polarization direction to the non-display side, so that the first photosensitive element 210 can monitor the light-emitting brightness of the first light-emitting device 110 in real time.
  • a light emitting device 110 performs brightness compensation. In this way, in the display mode, all sub-pixels of the display panel can achieve brightness compensation, thereby improving the display effect of the display panel.
  • the first photosensitive element 210 may be provided to overlap the first light-emitting device 110.
  • the luminous flux of the first light emitted by the first light emitting device 110 into the first photosensitive element 210 can be increased, and the detection accuracy of the first photosensitive element 210 can be improved.
  • the position of the first photosensitive element 210 is biased toward the same group of second pixel regions 102, that is, the first photosensitive element 210 to the same group of second pixel regions
  • the edge distance of 102 is smaller than the distance to the second pixel regions 102 of other groups.
  • FIG. 3 is a partial cross-sectional view of another display panel provided by an embodiment of the present disclosure, the display panel being in a recognition mode.
  • the light emitted by the first light emitting device is away from the first photosensitive element.
  • the first light-emitting driving lower electrode 113a of the first light-emitting device 110a is set as a reflective electrode, and the first light-emitting device 110a emits light only to the display side, so that in the case of displaying an image, the first light The light utilization rate of the device 110a is high.
  • the first pixel area includes a display portion and a non-display portion
  • the first light emitting device is located in the display portion
  • the light emitted from the first light emitting device is away from the first photosensitive element
  • the first light-emitting driving lower electrode may be configured as a reflective electrode
  • the first photosensitive element is at least partially located in the non-display portion or overlaps the edge of the display portion in a direction from the display side to the non-display side. Exemplarily, as shown in FIG.
  • the pixel area (first pixel area 101, second pixel area 102) includes a display portion 11 and a non-display portion 12, and the first light emitting device 110a is located in the display portion 11 of the first pixel area 101
  • the second light emitting device 120 is located in the display portion 11 of the second pixel area 102.
  • the first light-emitting driving lower electrode 113a is configured as a reflective electrode, and the first photosensitive element 210 is partially located in the non-display portion 12 of the first pixel area 101. In this way, after the first light emitted by the second light emitting device 120 is reflected by the fingerprint, it can enter the first photosensitive element 210 obliquely without being blocked by the first light-emitting lower electrode 113a.
  • the non-display portion 12 of the pixel area is usually provided with signal lines, such as gate lines, data lines, etc. There is a gap between the signal lines so that light can pass through the non-display portion 12.
  • the driving electrodes of the photosensitive element and the light-emitting device are provided as metal gratings
  • the driving electrodes may be entirely composed of metal gratings, or the driving electrodes may include metal gratings and transparent A stack of electrodes.
  • the metal grating can be a plurality of thin metal wires arranged at equal intervals.
  • the multiple thin metal wires are parallel to each other.
  • the light emitted by the light source (such as a backlight) includes light that vibrates in various directions, where the vibration directions are parallel.
  • the light in the direction of the metal grating can pass through the gap between the metal thin wires and form polarized light, while the light with the vibration direction perpendicular to the metal wire grid cannot pass through the gap between the metal thin wires and occur on the surface of the metal wire grid polarizer reflection.
  • the width of the metal thin wire may be 50-60 nm
  • the thickness (height) may be 100-170 nm
  • the arrangement period (the sum of the spacing distance between adjacent metal thin wires and the width of one metal thin wire) may be 90-150 nm .
  • one of the first light and the second light is TE light, and the other is TM light.
  • one of the first light and the second light is S light, and the other is P light.
  • the first light is S light and the second light is P light.
  • the TE light has a first polarization direction
  • the TM light has a second polarization direction
  • the first polarization direction and The second polarization direction is perpendicular.
  • the display panel may include a control circuit, such as a control chip.
  • a control circuit such as a control chip.
  • a first light-emitting drive circuit that drives the light-emitting luminance of the first light-emitting device
  • a first light-sensitive drive circuit that drives the first light-sensitive element.
  • a second light-emitting drive circuit that drives the light-emitting luminance of the second light-emitting device
  • a second compensation drive circuit that drives the second photosensitive element
  • the control chip is electrically connected with the first light-emitting drive circuit and the second light-emitting drive circuit, and may further be signal-connected with the first light-sensitive drive circuit and the second light-sensitive drive circuit to send an electrical signal reflecting the light-emitting brightness of the light-emitting device and receive fingerprint information And control the first light-emitting drive circuit and the second light-emitting drive circuit to perform brightness compensation on the first light-emitting device and the second light-emitting device.
  • control chip may be a central processor, a digital signal processor, a single-chip computer, a programmable logic controller, or the like.
  • the driving chip may further include a memory, and may also include a power module, etc., and the power supply and signal input and output functions are realized through additionally provided wires and signal lines.
  • the driver chip may also include hardware circuits and computer executable code.
  • the hardware circuit may include a conventional very large scale integration (VLSI) circuit or gate array and existing semiconductors such as logic chips, transistors or other discrete components; the hardware circuit may also include a field programmable gate array, programmable array logic, Programmable logic devices, etc.
  • VLSI very large scale integration
  • the display panel when detecting that a user's finger is close, switches the display panel to a recognition mode, and turns off the first light-emitting device in the area where the finger is located according to the position of the finger to avoid the first
  • the light emitting device emits light and interferes with fingerprint recognition.
  • the first photosensitive element may also be used to detect whether the display panel is touched to determine the touched position and the area where the fingerprint is located.
  • the display mode no light (first light) enters the first photosensitive element, while in the recognition mode, part of the light emitted by the second light emitting device will be reflected by the fingerprint to the first photosensitive element of the same group.
  • the detection result it can be determined that the second pixel area is covered by the fingerprint, and the position and area of the fingerprint can be located according to all the second pixel areas covered by the fingerprint.
  • the display panel further includes a position touch structure 400.
  • the position touch structure 400 includes multiple touch units.
  • the position touch structure is used to detect whether the display panel is touched and the touched position, and determine the area where the fingerprint is located.
  • the type of the position touch structure may include a resistive type, a capacitive type, an infrared type, an acoustic wave type, or other types.
  • the capacitive position touch structure may include a self-capacitance type and a mutual capacitance type. When an external object (such as a finger) approaches, the capacitance value of the capacitive touch unit will change, so that the touched position of the display substrate can be detected.
  • the embodiments of the present disclosure do not limit the specific type and structure of the position touch structure.
  • the position touch structure can be used to detect whether the display panel is touched, and if there is a touch, the display panel can be switched to the recognition mode and try to acquire a fingerprint image for fingerprint recognition.
  • the position touch structure may be attached to the display side of the display panel.
  • the position touch structure in the manufacturing process of the display panel, may be formed on the display side of the display panel by non-lamination methods such as deposition and patterning, for example, as shown in FIG. 3,
  • the light emitting device is covered with the encapsulation layer 300, and the position touch structure 400 (such as a touch electrode) is directly formed on the surface of the encapsulation layer 300.
  • the light emitting device and the photosensitive element may be provided on one substrate, or may be provided on different substrates respectively, and the light emitting mode of the display panel (the light emitting device therein) for displaying images may be set
  • the top emission can also be set to the bottom emission, and the positional relationship between the display side and the non-display side of the display panel, the photosensitive element and the light emitting device can be determined according to the light emitting mode.
  • the light emitting mode of the display panel is top emission.
  • the display panel further includes a first base substrate 10 and a second base substrate 20, a first light emitting device 110a and a second
  • the light emitting device 120 is located on the first base substrate 10
  • the side of the first light emitting device 110a and the second light emitting device 120 facing away from the first base substrate 10 is the display side
  • the second base substrate 20 is located on the first base substrate
  • the first photosensitive element 210 and the second photosensitive element 220 are located on the second base substrate 20.
  • the first photosensitive element 210 and the second photosensitive element 220 may be located on the side of the second base substrate 20 facing the first base substrate 10, or may be located on the second base substrate 20 facing away from the first base substrate 10 Side.
  • FIG. 4 is a partial cross-sectional view of another display panel provided by an embodiment of the present disclosure, the display panel being in a display mode.
  • the light emitting mode of the display panel is top emission.
  • the display panel further includes a first base substrate 10b, a first light emitting device 110b, a second light emitting device 120b, a first Both the photosensitive element 210b and the second photosensitive element 220b are located on the first base substrate 10b, and the sides of the first light emitting device 110b and the second light emitting device 120b facing away from the first base substrate 10b are the display side.
  • the process of manufacturing the photosensitive element and the light-emitting device needs to be performed on the first base substrate 10b, which simplifies the structure and manufacturing process of the display panel, and is conducive to the thinning and thinning of the display panel; and
  • the method helps to align the photosensitive element and the organic light-emitting device (sub-pixel) and improve the yield of the display panel.
  • the display panel provided by at least one embodiment of the present disclosure further includes a first substrate substrate, the first light emitting device and the second light emitting device are located on the first substrate substrate, and the first light emitting device and the second light emitting device face away from the first One side of the base substrate is the display side.
  • FIG. 5 is a partial cross-sectional view of another display panel provided by an embodiment of the present disclosure, the display panel being in a recognition mode.
  • the light emitting mode of the display panel is bottom emission.
  • the display panel further includes a first base substrate 10c and a second base substrate 20c, a first light emitting device 210c and a first The two light emitting devices 220c are located on the first base substrate 10c, the side of the first base substrate 10c facing away from the first light emitting device 110c and the second light emitting device 120c is the display side, and the second base substrate 20c is located on the first substrate On the side of the substrate 10c facing away from the first light emitting device 110c, the first photosensitive element 210c and the second photosensitive element 220c are located on the second base substrate 20c.
  • the first photosensitive element 210c and the second photosensitive element 220c may be located on the side of the second base substrate 20c facing the first base substrate 10c, or may be located on the second base substrate 20c facing away from the first base substrate 10c Side.
  • FIG. 6 is a partial cross-sectional view of another display panel provided by an embodiment of the present disclosure, the display panel being in a display mode.
  • the light emitting mode of the display panel is bottom emission.
  • the display panel further includes a first base substrate 10d, a first light emitting device 110d, a second light emitting device 120d, a first Both the photosensitive element 210d and the second photosensitive element 220d are located on the first base substrate 10d, and the sides of the first light emitting device 110d and the second light emitting device 120d facing the first base substrate 10d are the display side.
  • the process of manufacturing the photosensitive element and the light emitting device needs to be performed on the first base substrate 10d, which simplifies the structure and manufacturing process of the display panel, and is conducive to the thinning and thinning of the display panel; and
  • the method helps to align the photosensitive element and the organic light-emitting device (sub-pixel) and improve the yield of the display panel.
  • the first base substrate and the second base substrate may be transparent substrates or non-transparent substrates, for example, glass substrates, plastic substrates, or the like.
  • the display panel may further include optical films such as color filters and polarizing layers on the display side.
  • the polarizing layer constitutes a circular polarizer.
  • the circular polarizer includes a stacked linear polarizing layer and a quarter-wave plate.
  • the linear polarizing layer is located on the display side.
  • the axis of the quarter-wave plate is polarized with the linear polarizing layer. The axis is at an angle of 45 degrees, so when the external light passes through the circular polarizer, it is converted into circular polarized light. After the circular polarized light is reflected back by the electrodes in the display panel, it passes through the quarter wave plate for the second time.
  • the polarizing layer can absorb the external light directed to the display substrate, thereby reducing the interference of external ambient light and improving the contrast of the display image of the display substrate.
  • the color filter can absorb part of the ambient light to reduce the interference of the ambient light on the displayed image, and for a display panel having a light emitting device that emits white light, the color filter can cause the sub-pixels of the display panel to emit colored light to display a color image.
  • the display panel may be any product or component with a display function, such as a TV, digital camera, mobile phone, watch, tablet computer, notebook computer, or navigator.
  • a display function such as a TV, digital camera, mobile phone, watch, tablet computer, notebook computer, or navigator.
  • At least one embodiment of the present disclosure provides an operation method of a display panel, including: in a first state, causing a first light emitting device and a second light emitting device to emit light, and causing a second photosensitive element to detect incident second light, and The first light forms a display image; in the second state, at least the second light emitting device emits light, and the second photosensitive element detects the incident second light, and the first light emitted by the second light emitting device is reflected by an external object for at least at least Partially injected into the first photosensitive element.
  • the display panel can have both brightness compensation and recognition functions (such as fingerprint recognition), and can improve the accuracy of brightness compensation and the accuracy of fingerprint recognition.
  • the first state is a display mode
  • the second state is a recognition mode.
  • the operation method of the display panel can be adjusted according to the specific structure of the display panel.
  • the structure of the display panel reference may be made to the related descriptions in the foregoing embodiments, and details are not described herein.
  • the first light emitting device in the second state, is controlled not to emit light. In this way, in the recognition mode, the light emitted by the first light-emitting device is prevented from causing interference with fingerprint recognition.

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Abstract

一种显示面板及其操作方法。该显示面板中，第一像素区域(101)包括沿显示侧至非显示侧方向依次设置的第一发光器件(110)和第一感光元件(210)，第二像素区域(102)包括沿显示侧至非显示侧方向依次设置的第二发光器件(120)和第二感光元件(220)，第二发光器件(120)配置为向非显示侧发出第二光线，第二感光元件(220)配置为允许第二光线入射并进行检测，第一发光器件(110)和第二发光器件(120)配置为向显示侧发出第一光线，第一感光元件(210)配置为允许被外界物体反射的第一光线入射并进行检测，第二光线与第一光线类型不同。该显示面板可以用于实现兼具指纹识别和亮度补偿功能。

Description

显示面板及其操作方法 技术领域
本公开至少一个实施例涉及一种显示面板及其操作方法。
背景技术
在显示领域中，屏占比(例如全面屏)的显示产品具有较高的视觉冲击效果，显示效果突出，成为现在智能显示终端的新宠。但是，随着屏占比的提高，用于指纹识别的模组设计成为手机终端厂商亟需解决的问题，因而屏下指纹识别技术成为研发热点。此外，显示产品中像素的发光器件(例如有机发光器件)如果长时间工作在高对比度、高亮度的状态，发光器件因不同程度的老化使得像素的发光亮度衰退不一致，导致发光不均。
发明内容
本公开至少一个实施例提供一种显示面板，该显示面板具有显示侧和与所述显示侧相对的非显示侧以及至少一个第一像素区域和至少一个第二像素区域。所述第一像素区域包括沿所述显示侧至所述非显示侧方向依次设置的第一发光器件和第一感光元件，所述第二像素区域包括沿所述显示侧至所述非显示侧方向依次设置的第二发光器件和第二感光元件。所述第二发光器件配置为向所述非显示侧发出第二光线，所述第二感光元件配置为允许所述第二光线入射并进行检测，所述第一发光器件和所述第二发光器件配置为向所述显示侧发出第一光线，所述第一感光元件配置为允许被外界物体反射的所述第一光线入射并进行检测，所述第二光线与所述第一光线类型不同。
例如，在本公开至少一个实施例提供的显示面板中，所述第一像素区域包括多个所述第一发光器件和一个所述第一感光元件；和/或所述第二像素区域包括多个所述第二发光器件和一个所述第二感光元件。
例如，在本公开至少一个实施例提供的显示面板中，所述显示面板包括多个所述第一像素区域和多个所述第二像素区域，所述多个第一像素区域和所述多个第二像素区域在所述显示面板的第一方向上交替排布。
例如，在本公开至少一个实施例提供的显示面板中，所述第一发光器件包括由所述显示侧至所述非显示侧依次叠置的第一发光驱动上电极、第一发光层和第一发光驱动下电极；以及所述第二发光器件包括由所述显示侧至所述非显示侧依次叠置的第二发光驱动上电极、第二发光层和第二发光驱动下电极。
例如，在本公开至少一个实施例提供的显示面板中，所述第二发光驱动下电极配置为具有第二偏振方向的金属光栅以反射与所述第二偏振方向垂直的第一偏振方向的光，所述第二光线具有所述第二偏振方向。
例如，在本公开至少一个实施例提供的显示面板中，所述第二感光元件包括设置朝向所述第二发光器件的一侧的具有所述第二偏振方向的金属光栅。
例如，在本公开至少一个实施例提供的显示面板中，所述第一感光元件包括设置朝向所述第一发光器件的一侧的具有所述第一偏振方向的金属光栅。
例如，在本公开至少一个实施例提供的显示面板中，所述第二发光驱动上电极配置为具有所述第一偏振方向的金属光栅，所述第二发光器件出射的所述第一光线具有所述第一偏振方向。
例如，在本公开至少一个实施例提供的显示面板中，所述第一发光驱动上电极配置为具有所述第一偏振方向的金属光栅，所述第二发光器件出射的所述第一光线具有所述第一偏振方向。
例如，在本公开至少一个实施例提供的显示面板中，所述第一发光驱动下电极配置为具有所述第一偏振方向的金属光栅。
例如，在本公开至少一个实施例提供的显示面板中，所述第一发光器件出射的光线背离所述第一感光元件。
例如，在本公开至少一个实施例提供的显示面板中，所述第一像素区域包括显示部分和非显示部分，所述第一发光器件位于所述显示部分，所述第一发光驱动下电极配置为反射电极，并且所述第一感光元件至少部分位于所述非显示部分或者与所述显示部分的边缘在从所述显示侧到所述非显示侧的方向上重叠。
例如，本公开至少一个实施例提供的显示面板还包括第一衬底基板，所述第一发光器件和所述第二发光器件位于所述第一衬底基板上，所述第 一发光器件和所述第二发光器件的背离所述第一衬底基板的一侧为所述显示侧。
例如，在本公开至少一个实施例提供的显示面板中，所述第一感光元件和所述第二感光元件位于所述第一衬底基板上；或者所述显示面板还包括位于所述第一衬底基板的背离所述第一发光器件的一侧的第二衬底基板，所述第一感光元件和所述第二感光元件位于所述第二衬底基板上。
例如，本公开至少一个实施例提供的显示面板还包括第一衬底基板，所述第一发光器件和所述第二发光器件位于所述第一衬底基板上，所述第一衬底基板的背离所述第一发光器件和所述第二发光器件的一侧为所述显示侧。
例如，在本公开至少一个实施例提供的显示面板中，所述第一感光元件和所述第二感光元件位于所述第一衬底基板上；或者所述显示面板还包括位于所述第一发光器件的背离所述第一衬底基板的一侧的第二衬底基板，所述第一感光元件和所述第二感光元件位于所述第二衬底基板上。
例如，在本公开至少一个实施例提供的显示面板中，所述第一感光元件和所述第二感光元件包括光电二极管和光电晶体管至少之一。
本公开至少一个实施例提供一种根据上述任一实施例提供的显示面板的操作方法，包括：在第一状态，使得所述第一发光器件和第二发光器件发光，且使得所述第二感光元件对于入射的所述第二光线射入进行检测，并且所述第一光线形成显示图像；在第二状态，至少使得所述第二发光器件发光，且使得所述第二感光元件对于入射的所述第二光线进行检测，所述第二发光器件发出的所述第一光线被外界物体反射后至少部分射入所述第一感光元件。
例如，在本公开至少一个实施例提供的显示面板的操作方法中，在所述第二状态，控制所述第一发光器件不发光。
附图说明
为了更清楚地说明本发明实施例的技术方案，下面将对实施例的附图作简单地介绍，显而易见地，下面描述中的附图仅仅涉及本发明的一些实施例，而非对本发明的限制。
图1A为本公开一些实施例提供的一种显示面板的平面图；
图1B为图1A所示的显示面板在一种状态下沿线I-I的截面图；
图1C为图1A所示的显示面板在另一种状态下沿线I-I的截面图；
图2A为本公开一些实施例提供的一种显示面板在一种状态下的局部截面图；
图2B为本公开一些实施例提供的一种显示面板在一种状态下的局部截面图；
图3为本公开一些实施例提供的另一种显示面板的局部截面图；
图4为本公开一些实施例提供的另一种显示面板的局部截面图；
图5为本公开一些实施例提供的另一种显示面板的局部截面图；以及
图6为本公开一些实施例提供的另一种显示面板的局部截面图。
附图标记：
10-第一衬底基板；20-第二衬底基板；101-第一像素区域；102-第二像素区域；110-第一发光器件；111-第一发光驱动上电极；112-第一发光层；113-第一发光驱动下电极；120-第二发光器件；121-第二发光驱动上电极；122-第二发光层；123-第二发光驱动下电极；210-第一感光元件；211-第一感光驱动上电极；212-第一感光层；213-第一感光驱动下电极；220-第二感光元件；221-第二感光驱动上电极；222-第二感光层；223-第二感光驱动下电极；300-封装层；400-位置触控结构。
具体实施方式
为使本发明实施例的目的、技术方案和优点更加清楚，下面将结合本发明实施例的附图，对本发明实施例的技术方案进行清楚、完整地描述。显然，所描述的实施例是本发明的一部分实施例，而不是全部的实施例。基于所描述的本发明的实施例，本领域普通技术人员在无需创造性劳动的前提下所获得的所有其他实施例，都属于本发明保护的范围。
除非另外定义，本公开使用的技术术语或者科学术语应当为本发明所属领域内具有一般技能的人士所理解的通常意义。本公开中使用的“第一”、“第二”以及类似的词语并不表示任何顺序、数量或者重要性，而只是用来区分不同的组成部分。“包括”或者“包含”等类似的词语意指出现该词前面的元件或者物件涵盖出现在该词后面列举的元件或者物件及其等同，而不排除其他元件或者物件。“连接”或者“相连”等类似的词语并非限定 于物理的或者机械的连接，而是可以包括电性的连接，不管是直接的还是间接的。“上”、“下”、“左”、“右”等仅用于表示相对位置关系，当被描述对象的绝对位置改变后，则该相对位置关系也可能相应地改变。
通常情况下，像素电路包括发光器件(例如OLED(Organic Light-Emitting Diode，有机发光二极管))、薄膜晶体管(Thin Film Transistor，TFT)、存储电容等。例如，在显示过程中，该像素电路可以通过固定的栅极扫描信号控制TFT的开启与否，以将与显示数据对应的电压充电至存储电容，并通过该电压的大小控制显示单元的显示，进而调整显示单元的发光亮度。
一直以来，TFT的工艺稳定性是影响显示屏的显示画面的主要因素。由于TFT的制作工艺存在偏差，使得多个像素电路中的各个驱动TFT的阈值电压Vth与迁移率存在特性差异，从而使得各个像素之间出现亮度偏差，导致显示屏的亮度均匀性下降，甚至产生区域的斑点或图案。另一方面，采用有机材料制备的发光器件会随着使用时间渐渐老化，并且不可恢复，且在长时间点亮区域的发光器件会老化的更快，从而导致显示画面出现残像。因此，为了解决显示装置中关于亮度均匀性和残像的技术问题，除了进行薄膜晶体管的工艺的改善之外，人们还提出了补偿技术，例如，包括像素补偿(即内部补偿)和外部补偿。
由于像素补偿无法满足所有的背板技术，因此需要透过外部补偿进行改善。目前，大尺寸显示面板通常通过结合电学补偿与光学补偿的方式对像素电路进行补偿，该方式可以整合电学补偿与光学补偿的优点，提升显示面板的均匀性。一般来说，电学补偿可以透过感测信号线获取的像素电路的电压或电流来决定补偿数据，以补偿驱动TFT的特性(例如，阈值电压和迁移率等)；光学补偿可以整体上补偿显示面板的均匀性，由于光学补偿是透过光学方式进行补偿校正，因此，可以有效补偿各种原因造成的显示问题，例如可以解决在设备制程中产生的姆拉(Mura)现象等，并且光学补偿还可以实时进行，从而可以将实际发光亮度准确调节至预设亮度。
但是，对于当前的具有屏下指纹识别功能的显示产品，难以兼顾实时光学补偿功能与指纹识别功能；而且，在指纹识别的过程中，被用户指纹所反射的光会干扰用于补偿功能的光检测器件对显示面板实际发光亮度的检测，此时所检测的亮度并非像素的发光器件的实际发光亮度，因此，如 果执行亮度补偿，显示面板被调节后的实际发光亮度偏离预设亮度，从而不能实现实时亮度补偿。即在这种情况下，用于指纹识别和亮度补偿的光之间干扰严重，导致指纹识别的精度差，且补偿效果也可能变差。
本公开至少一个实施例提供一种显示面板。该显示面板具有显示侧和与显示侧相对的非显示侧，以及包括至少一个第一像素区域和至少一个第二像素区域。第一像素区域包括沿显示侧至非显示侧方向依次设置的第一发光器件和第一感光元件，第二像素区域包括沿显示侧至非显示侧方向依次设置的第二发光器件和第二感光元件。第二发光器件配置为向非显示侧发出第二光线，第二感光元件配置为允许第二光线入射并进行检测，第一发光器件和第二发光器件配置为向显示侧发出第一光线，第一感光元件配置为允许被外界物体反射的第一光线入射并进行检测，第二光线与第一光线类型不同。例如，光线的类型不同可以是不同光线分别具有不同的偏振态或者具有同一偏振态下的偏振方向不同。例如，光线的类型可以包括线偏光、部分偏振光、圆偏振光和椭圆偏振光等。例如，第二光线和第一光线都为线偏光，但是第二光线和第一光线的偏振方向不同(例如彼此垂直)。
本公开的一些实施例中，在正常显示时，第一发光器件和第二发光器件发出的第一光线可以用于构成显示图像；没有外界物体干扰，第二发光器件发出的第二光线进入第二感光元件，使得第二感光元件至少可以检测第二发光器件实际发光亮度，据此可以对第二区域进行实时亮度补偿。在识别模式时，有外界物体(例如手指、手掌等)靠近，第二发光器件发出的第一光线被手指反射后携带指纹信息(亮度信息)并射入第一感光元件，使得第一感光元件可以获取指纹图像以用于实现指纹识别。此外，在识别模式中，第一感光元件和第二感光元件分别接收类型不同的第一光线和第二光线，从而降低用于指纹识别和亮度补偿之间的光的干扰，并且消除或者降低被外界物体反射的光对第二感光元件的干扰，提高亮度补偿的精度，进而提高指纹识别的精度。
需要说明的是，待识别的外界物体可以为通过光学检测识别的手指、手掌等具有皮肤纹理的物体或者其它类型的物体。在本公开下述实施例中，以待识别的外界物体为手指的指纹为例进行说明。
下面，结合附图对根据本公开至少一个实施例中的显示面板及其操作方法进行说明。
图1A为本公开一实施例提供的一种显示面板的平面图；图1B为图1A所示的显示面板在一种状态下沿线I-I的截面图，图1C为图1A所示的显示面板在另一种状态下沿线I-I的截面图。图1B所示的显示面板处于显示模式，图1C所示的显示面板处于识别模式。例如，显示模式下，手指没有靠近(例如没有接触)显示面板的显示面，所有子像素出射的光都用于形成显示图像；识别模式下，手指靠近(例如接触)显示面板的显示面，以进行指纹识别。例如，在显示面板的显示侧，发光器件(例如第一发光器件110)上还会设置封装层、光学膜片、盖板或其它元件，因此，即使手指已经按压在显示面板的显示面上，如图1所示，手指1的指纹与发光器件仍是彼此间隔。
本公开至少一个实施例提供一种显示面板，如图1A的平面图所示，该显示面板包括多行多列像素单元。例如，每个像素单元包括四色的子像素，依次为红色子像素R、绿色子像素G、蓝色子像素B和白色子像素W，该四个子像素排列在一行中。例如，每个子像素占据一个像素区域。本公开的实施例不限制每个像素单元的组成，例如每个像素单元可以包括红色像素R、绿色像素G、蓝色像素B而不包括白色像素W，又例如每个像素单元可以包括红色像素R、绿色像素G、蓝色像素B以及黄色像素Y等。
继续参考图1B和图1C，该显示面板具有至少一个第一像素区域101和至少一个第二像素区域102，第一像素区域包括第一发光器件110和第一感光元件210，第二像素区域102包括第二发光器件120和第二感光元件220，且第一发光器件110的背离第一感光元件210的一侧为显示侧(图中的上侧)，第一感光元件210的背离第一发光器件110的一侧为非显示侧，第二发光器件120的背离第二感光元件220的一侧为显示侧，第二感光元件220的背离第二发光器件120的一侧为非显示侧(图中的下侧)。
本公开的实施例对于第一像素区域101和第二像素区域102所发出的光的颜色的没有限制。同时，本公开的实施例对于发光元件以及感光元件的类型以及具体结构不作限制，例如发光元件可以为有机发光元件、量子点发光元件等，例如感光元件可以为光电二极管、光敏晶体管等。
如图1B，在正常显示时，第一发光器件110和第二发光器120件发出第一光线(虚线的箭头“↑”)以形成显示图像，以使得位于显示侧的用户可以观看到显示图像；同时，第二发光器件120发出的第二光线(实线的箭 头“↑”)进入第二感光元件220以进行亮度补偿。如图1C所示，在识别模式时，用户手指1靠近显示面板，例如接触显示面板的显示侧表面，第二发光器件120发出的第二光线进入第二感光元件220以进行亮度补偿，同时，第一发光器件110和第二发光器120件发出的第一光线被手指1的指纹反射后进入第一感光元件210，第一感光元件210检测第一光线的亮度以进行指纹识别。
显示面板的显示面具有用于显示图像的显示区域，显示区域的至少部分可以作为指纹识别区。例如，在本公开一些实施例中，显示面板的显示区域的全部作为指纹识别区，该显示区域的全部由如图1B和图1C所示的第一像素区域101和第二像素区域102构成，例如第一像素区域101和第二像素区域102均匀分布在显示面板的显示区域内，使得显示面板具有全屏指纹识别和亮度补偿功能。例如，在本公开另一些实施例中，显示面板的显示区域的部分作为指纹识别区，该指纹识别区由如图1B和图1C所示的第一像素区域101和第二像素区域102构成，例如第一像素区域101和第二像素区域102均匀分布在指纹识别区内，使得显示面板的指纹识别区具有指纹识别和亮度补偿功能。例如，在识别模式下，对于未被手指1覆盖的区域，第一像素区域和第二像素区域可以如图1B所示显示图像。
例如，本公开至少一个实施例提供的显示面板包括多个第一像素区域和多个第二像素区域，多个第一像素区域和多个第二像素区域在显示面板的第一方向上交替排布。示例性的，如图1A～图1C所示，第一像素区域101和第二像素区域102沿第一方向(例如X轴方向)交替排布。例如，每两个相邻的第一像素区域101和第二像素区域102为一组，在识别模式下，第二像素区域102出射的第一光线被手指1反射后射入同一组的第一感光元件210(参考图3所示实施例的相关说明)，而基本上不会射入其它组的第一感光元件210，从而避免手指1的不同位置处反射的第一光线进入同一个第一感光元件210而造成指纹识别中的串扰。
在本公开至少一个实施例中，对感光元件(第一感光元件、第二感光元件)和发光器件(第一发光器件、第二发光器件)的数量对应关系不做限制。每个感光元件可以对应一个发光器件，也可以对应多个发光器件。
例如，在本公开一些实施例中，如图1A和图1B所示，第一像素区域101包括一个第一发光器件110和一个第一感光元件210，第二像素区域 102包括一个第二发光器件210和一个第二感光元件220，即，第一像素区域101和第二像素区域102分别对应一个子像素。如此，这些实施例的显示面板的指纹识别的精度高，而且每个感光元件(例如第二感光元件或者如2A所示实施例的第一感光元件和第二感光元件)可以用于检测一个子像素的发光亮度，改善亮度补偿的效果。
例如，在本公开另一些实施例提供的显示面板中，第一像素区域包括多个第一发光器件和一个第一感光元件，和/或第二像素区域包括多个第二发光器件和一个第二感光元件，即，第一像素区域和/或第二像素区域对应多个子像素。在这些实施例的显示面板中，通常由于制造工艺的因素，显示面板发光不良是以区域的形式存在，一个不良区域通常包括多个子像素；而且因为指纹相对于子像素的面积较大，在一个指纹识别区域内，即便用于识别指纹的感光元件的数量小于子像素的数量，也可以获取指纹图像以用于实现指纹识别。如此，对于多个子像素的所在区域，设置一个感光元件就可以进行亮度检测或者检测足够的指纹信息，因此感光元件(第一感光元件、第二感光元件)的设置数量少，简化显示面板结构，降低成本。
下面，以图1B和1C所示的子像素(例如其中的感光元件)和发光器件一一对应为例，对本公开下述至少一个实施例的技术方案进行说明。
例如，如图1C所示，在识别模式，可以将指纹覆盖区域的第一发光器件110关闭，从而防止第一发光器件110发出的光线对指纹识别造成干扰。如果第一发光器件110打开，其发出的光线会被指纹反射并射入第一感光元件210，导致第一感光元件210接收指纹不同位置处反射的光线，干扰指纹识别；此外，该光线被指纹反射可能射入相邻子像素中的第二感光元件220，如此，干扰第二感光元件220对第二发光器件120的亮度检测(例如检测值偏高)，在执行亮度补偿后，会将第二发光器件120的实际发光亮度调节至偏离预设亮度(例如实际发光亮度偏小)，即，用于指纹识别的第二发光器件220发出的第一光线的亮度偏离预设值，导致指纹识别的精度差。
图2A为本公开一实施例提供的一种显示面板在一种状态下的局部截面图，图2B为本公开一实施例提供的一种显示面板在一种状态下的局部截面图，例如分别对应于图1B和图1C所示的显示面板。图2A所示的显示面板处于显示模式，图2B所示的显示面板处于识别模式。
例如，在本公开至少一个实施例提供的显示面板中，第一发光器件包括由显示侧至非显示侧依次叠置的第一发光驱动上电极、第一发光层和第一发光驱动下电极；第二发光器件包括由显示侧至非显示侧依次叠置的第二发光驱动上电极、第二发光层和第二发光驱动下电极。
示例性的，如图2A和图2B所示，由显示侧至非显示侧，第一发光器件110包括叠置的第一发光驱动上电极111、第一发光层112和第一发光驱动下电极113；第二发光器件120包括叠置的第二发光驱动上电极121、第二发光层122和第二发光驱动下电极123。例如，发光器件(第一发光器件110、第二发光器件120)可以为有机发光器件或量子点发光器件，发光层(第一发光层112、第二发光层122)可以为有机发光层或量子点发光层，发光驱动上电极(第一发光驱动上电极111、第二发光驱动上电极121)和发光驱动下电极(第一发光驱动下电极113、第二发光驱动下电极123)之一为阳极，则另一为阴极。
例如，根据显示面板的类型，发光器件(第一发光器件、第二发光器件)可以为有机发光二极管(OLED)或量子点发光二极管(PLED)发光器件等。例如，发光器件的发光层(第一发光层、第二发光层)设置为可以发出不同颜色的光，例如红光、绿光、蓝光、黄光、白光等；例如多个像素区域的发光器件的发光层设置为一体化以发出同一颜色的光线，例如白光、蓝光、黄光或者其它颜色的光线。
例如，发光器件的发光层发出的光线为自然光，该自然光经过发光器件除发光层以外的结构后可以转化为偏振光；上述第一光线或第二光线只是该自然光中的一个方向上的分量，为了描述方便，把发光层发出的光线拆分为包括第一光线和第二光线，实际用于显示的光线为由包括第一光线和第二光线两个分量合成的光线。
例如，在本公开至少一个实施例提供的显示面板中，例如，感光元件可以为光电二极管例如PIN型光电二极管、PN型光电二极管或其它类型光电二极管，或者感光元件可以为光电晶体管。如图2A和图2B所示，第一感光元件210和第二感光元件220例如为PN型或PIN型光电二极管，并且由显示侧至非显示侧(即图中上侧到下侧)，第一感光元件210包括依次叠置的第一感光驱动上电极211、第一感光层212和第一感光驱动下电极213，第二感光元件220包括依次叠置的第二感光驱动上电极221、第二 感光层222和第二感光驱动下电极223。感光层(第一感光层212和第二感光层222)可以包括半导体材料，该半导体材料可以为硅材料，在光照作用下，感光层产生光电荷，该光电荷可以转换为电信号(电压信号或电流信号)，通过该电信号可以检测射入感光元件的第一光线的亮度。
例如，在本公开至少一个实施例提供的显示面板中，第二发光驱动下电极配置为具有第二偏振方向的金属光栅，以透射具有第二偏振方向的光且反射与第二偏振方向垂直的第一偏振方向的光，由此，向显示侧出射的第一光线具有第一偏振方向，向非显示侧出射的第二光线具有第二偏振方向。示例性的，如图2A和图2B所示，第二发光驱动下电极123设置为具有第二偏振方向的金属光栅。如此，在第二像素区域102中，第二光线具有第二偏振方向，被第二发光驱动下电极123反射的第一光线具有与第二偏振方向垂直的第一偏振方向，该第一光线被指纹反射后不能透过第二发光驱动下电极123而射入第二感光元件220。因此，在识别模式，第一光线不会干扰第二感光元件的检测，因此第二感光元件可以检测第二发光器件120的实际发光亮度，不会受到反射光的影响，从而保证实时亮度补偿。
基于上述情形，在本公开至少一个实施例中，只要第二感光元件的第二感光驱动上电极可以使得光透过，第二感光元件即可以对第二发光器件的发光亮度进行检测，从而实现亮度补偿。例如，第二感光驱动上电极可以为透明或半透明电极、设置有过孔的电极或者金属光栅等。
例如，在本公开至少一个实施例提供的显示面板中，第二感光元件包括设置朝向第二发光器件的一侧的具有第二偏振方向的金属光栅。例如，该金属光栅可以作为第二感光元件的第二感光驱动上电极。示例性的，如图2A和图2B所示，第二感光驱动上电极221设置为具有第二偏振方向的金属光栅。如此，对于透过第二发光驱动下电极123的具有第二偏振方向的第二光线，在透过第二感光驱动上电极221时不会被吸收，亮度不会降低，从而第二感光元件220的检测精度高。例如，第二感光驱动下电极223可以设置为反射电极，以将透射出第二感光层222的第二光线反射回第二感光层222，从而提高对射入第二感光元件220的第二光线的利用率，提高第二感光元件220的检测精度。
在本公开至少一个实施例中，第二发光器件发出的第一光线被指纹反射后携带指纹信息(亮度)，只要第一感光元件的第一感光驱动上电极可以 使得光透过，该携带指纹信息的第一光线可以射入第一感光元件，从而第一感光元件可以获取指纹图像以用于实现指纹识别。例如，第二感光驱动上电极可以为透明或半透明电极、设置有过孔的电极或者金属光栅等。
例如，在本公开至少一个实施例提供的显示面板中，第一感光元件包括设置朝向第一发光器件的一侧的具有第一偏振方向的金属光栅。例如，该金属光栅可以作为第一感光元件的第一感光驱动上电极。示例性的，如图2A和图2B所示，第一感光驱动上电极211设置为具有第一偏振方向的金属光栅。如此，对于第一发光器件110和第二发光器件120出射的第一光线，被指纹反射且射向第一感光元件210的过程中，第一光线在透过第一感光驱动上电极211时不会被吸收，亮度不会降低，从而第一光线从指纹反射至第一感光层212的过程中的透过率高，从而提高第一感光元件210的检测精度。例如，第一感光驱动下电极213可以设置为反射电极，以将透射出第一感光层212的第一光线反射回第一感光层212，从而提高对射入第一感光元件210的第一光线的利用率，提高第一感光元件210的检测精度。
例如，在本公开至少一个实施例提供的显示面板中，第二发光驱动上电极配置为具有第一偏振方向的金属光栅，第二发光器件出射的第一光线具有第一偏振方向。示例性的，如图2A和图2B所示，第二发光驱动下电极123设置为具有第二偏振方向的金属光栅，第二发光驱动上电极121为具有第一偏振方向的金属光栅。如此，第二发光器件120向非显示侧出射的光(第二光线)全部具有第二偏振方向，向显示侧出射的光(第一光线)全部具有第一偏振方向，即，由第二发光器件120出射且被指纹反射的光不能透过第二发光驱动下电极123进入第二感光元件220。如此，在识别模式下，可以消除第二发光器件120向显示侧发出的光线对第二感光元件220的干扰，提高第二感光元件220对第二发光器件120的发光亮度的检测精度，从而提高亮度补偿的准确度，并进一步提高指纹识别的精度。
例如，在本公开至少一个实施例提供的显示面板中，第一发光驱动上电极配置为具有第一偏振方向的金属光栅，第二发光器件出射的第一光线具有第一偏振方向。示例性的，如图2A和图2B所示，第一发光驱动上电极111设置为具有第一偏振方向的金属光栅。如此，在识别模式，被指纹反射且射向第一感光元件210的第一光线除了经过像素区域之间的间隙入 射之外，在第一光线透过第一发光驱动上电极111时，第一光线可以全部透过第一发光驱动上电极111以入射到第一感光元件210，增加第一光线的透过率，从而提高第一感光元件210的检测精度。
例如，如图2A和图2B所示，第一发光驱动上电极和第二发光驱动上电极可以设置为一体化电极，以作为第一发光器件和第二发光器件的公共电极(例如公共阴极)，例如，该公共电极在与发光层相重叠的部分(例如位于显示部分11中)形成为线栅，但是在其他部分(例如位于非显示部分12中)则例如形成为镂空区域(开口)以允许反射的第一光线入射，如此，可以简化显示面板的制造工艺，降低成本。
例如，在本公开一些实施例提供的显示面板中，第一发光驱动下电极配置为具有第一偏振方向的金属光栅。示例性的，如图2A和图2B所示，第一发光器件110的第一发光驱动下电极113设置为具有第一偏振方向的金属光栅。如此，在识别模式，对于被指纹反射且射向第一感光元件210的第一光线，该第一光线在透过第一发光驱动下电极113时可以全部透过而不会被吸收，亮度不会降低，第一光线从指纹反射至第一感光层212的过程中的透过率高，从而提高第一感光元件210的检测精度。此外，在显示模式，第一发光器件110可以向非显示侧出射具有第一偏振方向的第一光线，从而第一感光元件210可以实时监测第一发光器件110的发光亮度，可以据此对第一发光器件110进行亮度补偿。如此，在显示模式下，显示面板的所有子像素都可以实现亮度补偿，从而提高显示面板的显示效果。
例如，如图2A和图2B所示，在第一发光驱动下电极113设置为具有第一偏振方向的金属光栅的情况下，第一感光元件210可以设置为与第一发光器件110重叠。如此，在显示模式下，可以增加第一发光器件110发出的第一光线进入第一感光元件210的光通量，提高第一感光元件210的检测精度。例如，对于每组的第一像素区域101和第二像素区域102，第一感光元件210的位置偏向同一组的第二像素区域102，即，第一感光元件210至同一组的第二像素区域102的边缘距离小于至其它组的第二像素区域102的距离。如此，在识别模式，可以避免第二发光器件发出的第一光线被指纹反射后射入其它组的第一感光元件而产生干扰，从而提高指纹识别的精度。
图3为本公开一实施例提供的另一种显示面板的局部截面图，该显示 面板处于识别模式。
例如，在本公开另一些实施例中，第一发光器件出射的光线背离第一感光元件。示例性的，如图3所示，第一发光器件110a的第一发光驱动下电极113a设置为反射电极，第一发光器件110a只向显示侧出射光线，从而在显示图像情形下，第一发光器件110a的光利用率高。
例如，在本公开至少一个实施例提供的显示面板中，第一像素区域包括显示部分和非显示部分，第一发光器件位于显示部分，在第一发光器件出射的光线背离第一感光元件的情况下，第一发光驱动下电极可以配置为反射电极，并且第一感光元件至少部分位于非显示部分或者与显示部分的边缘在从显示侧到非显示侧的方向上重叠。示例性的，如图3所示，像素区域(第一像素区域101、第二像素区域102)包括显示部分11和非显示部分12，第一发光器件110a位于第一像素区域101的显示部分11，第二发光器件120位于第二像素区域102的显示部分11。第一发光驱动下电极113a配置为反射电极，并且第一感光元件210部分位于第一像素区域101的非显示部分12。如此，第二发光器件120发出的第一光线被指纹反射后，可以斜射入第一感光元件210，而不会被第一发光驱动下电极113a遮挡。像素区域的非显示部分12通常设置有信号线，例如栅线、数据线等，信号线之间会存在间隙从而使得光可以从非显示部分12透过。
需要说明是，在本公开至少一个实施例中，在感光元件、发光器件的驱动电极设置为金属光栅的情况下，该驱动电极可以完全由金属光栅构成，或者该驱动电极可以包括金属光栅和透明电极构成的叠层。
金属光栅(线栅偏振片)可以为等间距设置的多条金属细线，多条金属细线相互平行，光源(例如背光源)发出的光线中包含向各个方向振动的光线，其中振动方向平行于金属光栅方向的光线可以从金属细线之间的间隙通过并形成偏振光，而振动方向与金属线栅垂直的光线不能通过金属细线之间的间隙并在金属线栅偏振片的表面发生反射。例如，金属细线的宽度可以为50～60nm，厚度(高度)可以为100～170nm，排布周期(相邻金属细线的间隔距离与一条金属细线的宽度之和)可以为90～150nm。
例如，在一些实施例中，第一光线和第二光线之一为TE光，另一为TM光。例如，在另一些实施例中，第一光线和第二光线之一为S光，另一为P光。示例性的，第一光线为S光，第二光线为P光。例如，在本公 开至少一个实施例中，在第一光线为TE光且第二光线为TM光的情况下，TE光具有第一偏振方向，TM光具有第二偏振方向，第一偏振方向和第二偏振方向垂直。
例如，在本公开至少一个实施例中，显示面板可以包括控制电路，例如控制芯片。在第一像素区域中，设置有驱动第一发光器件的发光亮度的第一发光驱动电路，以及驱动第一感光元件的第一感光驱动电路。在第二像素区域中，设置有驱动第二发光器件的发光亮度的第二发光驱动电路，以及驱动第二感光元件的第二补偿驱动电路。控制芯片与第一发光驱动电路和第二发光驱动电路电连接，还可以进一步与第一感光驱动电路和第二感光驱动电路信号连接，以发送反映发光器件发光亮度的电信号、接收反映指纹信息的电信号，并控制第一发光驱动电路和第二发光驱动电路以对第一发光器件和第二发光器件进行亮度补偿。
例如，控制芯片可以为中央处理器、数字信号处理器、单片机、可编程逻辑控制器等。例如，驱动芯片还可以包括存储器，还可以包括电源模块等，且通过另外设置的导线、信号线等实现供电以及信号输入输出功能。例如，驱动芯片还可以包括硬件电路以及计算机可执行代码等。硬件电路可以包括常规的超大规模集成(VLSI)电路或者门阵列以及诸如逻辑芯片、晶体管之类的现有半导体或者其它分立的元件；硬件电路还可以包括现场可编程门阵列、可编程阵列逻辑、可编程逻辑设备等。
例如，在本公开至少一个实施例中，显示面板在检测到有用户的手指靠近时，将显示面板切换为识别模式，根据手指所在的位置，关闭手指所在区域的第一发光器件，避免第一发光器件发出光线而干扰指纹识别。
例如，在本公开一些实施例中，还可以利用第一感光元件检测显示面板是否被触摸以确定被触摸的位置以及指纹所在的区域。在显示模式，没有光线(第一光线)射入第一感光元件，而在识别模式，第二发光器件出射的部分光线会被指纹反射至同组的第一感光元件，根据第一感光元件的检测结果，可以判定该第二像素区域被指纹覆盖，根据所有被指纹覆盖的第二像素区域可以定位指纹的位置以及面积。
例如，在本公开另一些实施例中，如图3所示，显示面板还包括位置触控结构400。例如，位置触控结构400包括多个触控单元。利用位置触控结构检测显示面板是否被触摸以及触摸的位置，并确定指纹所在的区域。 例如，位置触控结构的类型可以包括电阻式、电容式、红外线式、声波式或者其它类型。例如，电容式位置触控结构可以包括自电容型、互电容型。在外界物体(例如手指)靠近的情况下，电容式触控单元的电容值会发生变化，如此，可以对显示基板的被触摸位置进行检测。本公开的实施例对于位置触控结构的具体类型以及结构不作限制。在本公开的至少一个实施例中，位置触控结构可以用于检测显示面板是否被触摸，如果存在触摸，则可以将显示面板切换为识别模式，尝试获取指纹图像，以用于指纹识别。
在本公开至少一个实施例中，对位置触控结构在显示面板中的设置方式不做限制。例如，在本公开一些实施例中，位置触控结构可以贴合在显示面板的显示侧。例如，在本公开另一些实施例中，在显示面板的制造过程中，位置触控结构可以利用沉积、构图等非贴合的方式形成在显示面板的显示侧，例如，如图3所示，发光器件上覆盖封装层300，位置触控结构400(例如触控电极)直接形成在该封装层300的表面上。
在本公开至少一个实施例中，发光器件和感光元件可设置在一个基板上，也可以分别设置在不同的基板上，而且显示面板(其中的发光器件)的用于显示图像的发光模式可以设置为顶发射也可以设置为底发射，显示面板的显示侧和非显示侧、感光元件和发光器件的位置关系可以根据发光模式确定。
例如，本公开一些实施例中，显示面板的发光模式为顶发射，如图3所示，显示面板还包括第一衬底基板10和第二衬底基板20，第一发光器件110a和第二发光器件120位于第一衬底基板10上，第一发光器件110a和第二发光器件120的背离第一衬底基板10的一侧为显示侧，第二衬底基板20位于第一衬底基板10的背离第一发光器件110a的一侧，第一感光元件210和第二感光元件220位于第二衬底基板20上。例如，第一感光元件210和第二感光元件220可以位于第二衬底基板20的面向第一衬底基板10的一侧，也可以位于第二衬底基板20的背离第一衬底基板10的一侧。
图4为本公开一实施例提供的另一种显示面板的局部截面图，该显示面板处于显示模式。
例如，本公开另一些实施例中，显示面板的发光模式为顶发射，如图4所示，显示面板还包括第一衬底基板10b，第一发光器件110b、第二发光器件120b、第一感光元件210b和第二感光元件220b都位于第一衬底基 板10b上，第一发光器件110b和第二发光器件120b的背离第一衬底基板10b的一侧为显示侧。如此，在显示面板的制造过程中，只需要在第一衬底基板10b上进行制造感光元件和发光器件的工艺，简化显示面板的结构和制造工艺，且有利于显示面板的轻薄化；而且该方式有助于感光元件和有机发光器件(子像素)对准，提高显示面板的良率。
例如，本公开至少一个实施例提供的显示面板还包括第一衬底基板，第一发光器件和第二发光器件位于第一衬底基板上，第一发光器件和第二发光器件的背离第一衬底基板的一侧为显示侧。
图5为本公开一实施例提供的另一种显示面板的局部截面图，该显示面板处于识别模式。
例如，本公开另一些实施例中，显示面板的发光模式为底发射，如图5所示，显示面板还包括第一衬底基板10c和第二衬底基板20c，第一发光器件210c和第二发光器件220c位于第一衬底基板10c上，第一衬底基板10c的背离第一发光器件110c和第二发光器件120c的一侧为显示侧，第二衬底基板20c位于第一衬底基板10c的背离第一发光器件110c的一侧，第一感光元件210c和第二感光元件220c位于第二衬底基板20c上。例如，第一感光元件210c和第二感光元件220c可以位于第二衬底基板20c的面向第一衬底基板10c的一侧，也可以位于第二衬底基板20c的背离第一衬底基板10c的一侧。
图6为本公开一实施例提供的另一种显示面板的局部截面图，该显示面板处于显示模式。
例如，本公开另一些实施例中，显示面板的发光模式为底发射，如图6所示，显示面板还包括第一衬底基板10d，第一发光器件110d、第二发光器件120d、第一感光元件210d和第二感光元件220d都位于第一衬底基板10d上，第一发光器件110d和第二发光器件120d的面向第一衬底基板10d的一侧为显示侧。如此，在显示面板的制造过程中，只需要在第一衬底基板10d上进行制造感光元件和发光器件的工艺，简化显示面板的结构和制造工艺，且有利于显示面板的轻薄化；而且该方式有助于感光元件和有机发光器件(子像素)对准，提高显示面板的良率。
在上述实施例中，根据需要，第一衬底基板和第二衬底基板可以为透明基板或非透明基板，例如可以为玻璃基板、塑料基板等。
在本公开至少一个实施例中，显示面板还可以包括位于显示侧的滤色片、偏光层等光学膜片。例如，该偏光层构成圆偏光片，该圆偏光片包括层叠的线性偏光层以及四分之一波片，线性偏光层位于显示侧，该四分之一波片的轴与线性偏光层的偏光轴成45度角，因此当外部光穿过该圆偏光片之后，被转换为圆偏光，该圆偏光被显示面板中的电极反射回之后，第二次穿过四分之一波片时又被转换为线偏光，但是该线偏光的偏振方向与线性偏光层的偏光轴相差90度，而不能穿过该线性偏光层。因此，该偏光层可以吸收射向显示基板的外部光，从而降低外界环境光的干扰，提高显示基板的显示图像的对比度。滤色片可以吸收部分环境光线，以降低环境光对显示图像的干扰，而且对于具有发射白光的发光器件的显示面板，滤色片可以使得显示面板的子像素出射彩色光线以显示彩色图像。
在本公开至少一个实施例中，显示面板可以为电视、数码相机、手机、手表、平板电脑、笔记本电脑、导航仪等任何具有显示功能的产品或者部件。
本公开至少一个实施例提供一种显示面板的操作方法，包括：在第一状态，使得第一发光器件和第二发光器件发光，且使得第二感光元件对于入射的第二光线进行检测，并且第一光线形成显示图像；在第二状态，至少使得第二发光器件发光，且使得第二感光元件对于入射的第二光线进行检测，第二发光器件发出的第一光线被外界物体反射后至少部分射入第一感光元件。如此，显示面板可以兼具亮度补偿和识别功能(例如指纹识别)，而且可以提高亮度补偿的精度，以及提高指纹识别的精度。例如，该第一状态为显示模式，第二状态为识别模式。显示面板的操作方法可以根据显示面板的具体结构进行调整，显示面板的结构可以参考前述实施例中的相关说明，在此不做赘述。
例如，在本公开至少一个实施例提供的显示面板的操作方法中，在第二状态，控制第一发光器件不发光。如此，在识别模式，防止第一发光器件发出的光线对指纹识别造成干扰。
对于本公开，还有以下几点需要说明：
(1)本公开实施例附图只涉及到与本公开实施例涉及到的结构，其他结构可参考通常设计。
(2)在不冲突的情况下，本公开的实施例及实施例中的特征可 以相互组合以得到新的实施例。
以上，仅为本公开的具体实施方式，但本公开的保护范围并不局限于此，本公开的保护范围应以权利要求的保护范围为准。

Claims (19)

  1. 一种显示面板，具有显示侧和与所述显示侧相对的非显示侧，包括：
    至少一个第一像素区域，包括沿所述显示侧至所述非显示侧方向依次设置的第一发光器件和第一感光元件；以及
    至少一个第二像素区域，包括沿所述显示侧至所述非显示侧方向依次设置的第二发光器件和第二感光元件；
    其中，所述第二发光器件配置为向所述非显示侧发出第二光线，所述第二感光元件配置为允许所述第二光线入射并进行检测，
    所述第一发光器件和所述第二发光器件配置为向所述显示侧发出第一光线，所述第一感光元件配置为允许被外界物体反射的所述第一光线入射并进行检测，所述第二光线与所述第一光线类型不同。
  2. 根据权利要求1所述的显示面板，其中，
    所述第一像素区域包括多个所述第一发光器件和一个所述第一感光元件；和/或
    所述第二像素区域包括多个所述第二发光器件和一个所述第二感光元件。
  3. 根据权利要求1或2所述的显示面板，其中，所述显示面板包括多个所述第一像素区域和多个所述第二像素区域，所述多个第一像素区域和所述多个第二像素区域在所述显示面板的第一方向上交替排布。
  4. 根据权利要求1-3任一所述的显示面板，其中，
    所述第一发光器件包括由所述显示侧至所述非显示侧依次叠置的第一发光驱动上电极、第一发光层和第一发光驱动下电极；以及
    所述第二发光器件包括由所述显示侧至所述非显示侧依次叠置的第二发光驱动上电极、第二发光层和第二发光驱动下电极。
  5. 根据权利要求4所述的显示面板，其中，
    所述第二发光驱动下电极配置为具有第二偏振方向的金属光栅以反射与所述第二偏振方向垂直的第一偏振方向的光，所述第二光线具有所述第二偏振方向。
  6. 根据权利要求5所述的显示面板，其中，
    所述第二感光元件包括设置朝向所述第二发光器件的一侧的具有所述第二偏振方向的金属光栅。
  7. 根据权利要求5或6所述的显示面板，其中，
    所述第一感光元件包括设置朝向所述第一发光器件的一侧的具有所述第一偏振方向的金属光栅。
  8. 根据权利要求5-7任一所述的显示面板，其中，
    所述第二发光驱动上电极配置为具有所述第一偏振方向的金属光栅，所述第二发光器件出射的所述第一光线具有所述第一偏振方向。
  9. 根据权利要求5-8任一所述的显示面板，其中，
    所述第一发光驱动上电极配置为具有所述第一偏振方向的金属光栅，所述第二发光器件出射的所述第一光线具有所述第一偏振方向。
  10. 根据权利要求5-9任一所述的显示基板，其中，
    所述第一发光驱动下电极配置为具有所述第一偏振方向的金属光栅。
  11. 根据权利要求4-9任一所述的显示面板，其中，
    所述第一发光器件出射的光线背离所述第一感光元件。
  12. 根据权利要求11所述的显示面板，其中，所述第一像素区域包括显示部分和非显示部分，
    所述第一发光器件位于所述显示部分，所述第一发光驱动下电极配置为反射电极，并且所述第一感光元件至少部分位于所述非显示部分或者与所述显示部分的边缘在从所述显示侧到所述非显示侧的方向上重叠。
  13. 根据权利要求1-12任一所述的显示面板，还包括第一衬底基板，其中，
    所述第一发光器件和所述第二发光器件位于所述第一衬底基板上，所述第一发光器件和所述第二发光器件的背离所述第一衬底基板的一侧为所述显示侧。
  14. 根据权利要求13所述的显示面板，其中，
    所述第一感光元件和所述第二感光元件位于所述第一衬底基板上；或者
    所述显示面板还包括位于所述第一衬底基板的背离所述第一发光器件的一侧的第二衬底基板，所述第一感光元件和所述第二感光元件位于所述第二衬底基板上。
  15. 根据权利要求1-12任一所述的显示面板，还包括第一衬底基板，其中，
    所述第一发光器件和所述第二发光器件位于所述第一衬底基板上，所述第一衬底基板的背离所述第一发光器件和所述第二发光器件的一侧为所述显示侧。
  16. 根据权利要求15所述的显示面板，其中，
    所述第一感光元件和所述第二感光元件位于所述第一衬底基板上；或者
    所述显示面板还包括位于所述第一发光器件的背离所述第一衬底基板的一侧的第二衬底基板，所述第一感光元件和所述第二感光元件位于所述第二衬底基板上。
  17. 根据权利要求1-16任一所述的显示面板，其中，
    所述第一感光元件和所述第二感光元件包括光电二极管和光电晶体管至少之一。
  18. 一种根据权利要求1-17任一所述的显示面板的操作方法，包括：
    在第一状态，使得所述第一发光器件和第二发光器件发光，且使得所述第二感光元件对于入射的所述第二光线进行检测，并且所述第一光线形成显示图像；
    在第二状态，至少使得所述第二发光器件发光，且使得所述第二感光元件对于入射的所述第二光线进行检测，所述第二发光器件发出的所述第一光线被外界物体反射后至少部分射入所述第一感光元件。
  19. 根据权利要求18所述的操作方法，其中，
    在所述第二状态，控制所述第一发光器件不发光。
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