WO2023273470A1 - Panneau d'affichage, écran d'affichage et dispositif électronique - Google Patents

Panneau d'affichage, écran d'affichage et dispositif électronique Download PDF

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Publication number
WO2023273470A1
WO2023273470A1 PCT/CN2022/084610 CN2022084610W WO2023273470A1 WO 2023273470 A1 WO2023273470 A1 WO 2023273470A1 CN 2022084610 W CN2022084610 W CN 2022084610W WO 2023273470 A1 WO2023273470 A1 WO 2023273470A1
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WO
WIPO (PCT)
Prior art keywords
display panel
light
display
area
ink layer
Prior art date
Application number
PCT/CN2022/084610
Other languages
English (en)
Chinese (zh)
Inventor
李灵芝
韩钢峰
贾卫波
李杰威
Original Assignee
华为技术有限公司
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Publication of WO2023273470A1 publication Critical patent/WO2023273470A1/fr

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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • 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]
    • G09G3/3225—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] using an active matrix
    • G09G3/3233—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] using an active matrix with pixel circuitry controlling the current through the light-emitting element
    • 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
    • G09G3/34—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 by control of light from an independent source
    • G09G3/36—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 by control of light from an independent source using liquid crystals
    • 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
    • H10K59/80—Constructional details
    • H10K59/87—Passivation; Containers; Encapsulations
    • H10K59/871—Self-supporting sealing arrangements
    • 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
    • H10K59/80—Constructional details
    • H10K59/8791—Arrangements for improving contrast, e.g. preventing reflection of ambient light
    • H10K59/8792—Arrangements for improving contrast, e.g. preventing reflection of ambient light comprising light absorbing layers, e.g. black layers

Definitions

  • the present application relates to the field of electronic equipment, in particular to a display panel, a display screen and electronic equipment.
  • ambient light detection At present, electronic devices such as smart watches, smart bracelets, and mobile phones usually have the function of ambient light detection.
  • One of the main applications of the ambient light detection function is to automatically adjust the brightness of the screen by detecting the brightness of the ambient light, so that users have a good experience.
  • the ambient light detection function is also used in scenarios such as light intensity detection and touch control.
  • the ambient light detection mainly depends on placing a light sensor (such as an ambient light sensor, atmosphere light sensor, ALS) under the display panel of the electronic device.
  • a light sensor such as an ambient light sensor, atmosphere light sensor, ALS
  • the ALS is placed under the display panel, and the light in the environment can be passed through the visible area (view area, VA) of the cover plate on the display panel and the display area (active area, AA, operable area or display area) of the display panel.
  • the ALS receives it for ambient light detection.
  • the thickness of the module is relatively high.
  • Embodiments of the present application provide a display panel, a display screen and electronic equipment, which can reduce the module thickness of the display screen and simplify the structural industrial design of the product.
  • a display panel in a first aspect, includes: a display area AA and a non-display area NA located around the display area; the display panel can be circular, and of course other special-shaped display panels such as polygonal, elliptical, etc.; the non-display area NA is provided with peripheral circuits , the display area AA is provided with pixel units distributed in an array; wherein, on the non-display area NA, a photosensor is arranged between the display area AA and the peripheral circuit; a first photosensitive device.
  • the module thickness of the display screen can be reduced, thereby reducing the product thickness of the electronic equipment using the display screen.
  • the light can directly reach the light sensor on the display panel after passing through the cover plate of the display screen, instead of passing through the display panel and reaching the light sensor, which reduces the sensitivity requirement of the light sensor, and, due to the multiple light sensors
  • a photosensitive device is arranged on the display panel in a manner of extending and distributing along the boundary line between the display area AA and the peripheral circuit.
  • a cover plate to protect the display panel, and for the sake of beautiful appearance, a light-shielding ink layer is usually arranged between the display panel and the cover plate to block the non-display area of the display panel.
  • the light The sensor In order to reduce the influence of the optical sensor on the aperture ratio of the display panel, the light The sensor cannot be set in the display area. However, if the light sensor is set in the non-display area, it is usually necessary to carry out a corresponding coupling design for the shape of the light-shielding ink layer, so as to remove the light-shielding ink layer of the light sensor or design it to filter the ink of the specified light wavelength band Such a material increases the demand for alignment accuracy of the coupling between the light-shielding ink layer and the photosensor, and affects the industrial design of the appearance of the product. However, there is a gap between the light-shielding ink layer and the display area of the display panel.
  • the cover plate when the cover plate is provided, it is only necessary to leak a plurality of photosensitive devices extending and distributed along the boundary line between the display area AA and the peripheral circuit from the above-mentioned gap. That is, there is no need to specially set the shape of the light-shielding ink layer, so the structure of the product is simple, and it can be directly compatible with the appearance design of the current cover plate and the light-shielding ink layer.
  • a cover plate is provided on the display panel, wherein a light-shielding ink layer is included between the cover plate and the display panel; the projection of the light-shielding ink layer on the display panel is located in a non-display area; wherein, a plurality of first The photosensitive device is distributed between the projection area of the light-shielding ink layer on the display panel and the display area.
  • the plurality of first photosensitive devices are distributed in the visible area VA, and the visible area VA is not blocked by the light-shielding ink layer, ambient light can be irradiated to the plurality of first photosensitive devices through the cover plate, thereby realizing the detection of ambient light.
  • a cover plate is provided on the display panel, wherein a filter ink layer is included between the cover plate and the display panel; the filter ink layer covers the area between the display area and the peripheral circuit, and the light filter
  • the ink layer absorbs light in the ultraviolet band. Since the filter ink layer absorbs the light in the ultraviolet band, the light in the ultraviolet band in the ambient light will be absorbed, and the light passing through the filter ink layer can include the visible light band (such as the wavelength range of 400nm to 700nm) and other The light in the light band (for example, the infrared light band) can realize the detection of the visible light in the ambient light and the light in other light bands.
  • the light filter ink layer can be arranged for a week along the area between the display area AA and the peripheral circuit, so that the influence of the light filter ink layer on the industrial design of the product appearance can also be reduced as much as possible, and there is no need to consider the coupling with multiple first photosensitive devices Alignment reduces the difficulty of assembly.
  • a cover plate is provided on the display panel, wherein a light-shielding ink layer is included between the cover plate and the display panel; the projection of the light-shielding ink layer on the display panel is located in a non-display area;
  • a plurality of first photosensitive devices are distributed in the projection area of the light-shielding ink layer on the display panel, wherein the light-shielding ink layer transmits light in the ultraviolet band. Since the filter ink layer transmits the light in the ultraviolet band, the detection of the light in the ultraviolet band in the ambient light can be realized.
  • the plurality of first photosensitive devices are distributed on a side close to the display area in the projection area of the light-shielding ink layer on the display panel.
  • the photosensor further includes a plurality of second photosensitive devices, and a cover plate is arranged on the display panel, wherein a light-shielding ink layer is included between the cover plate and the display panel; the projection of the light-shielding ink layer on the display panel Located in the non-display area; a plurality of second photosensitive devices are distributed in the projection area of the light-shielding ink layer on the display panel.
  • the filter ink layer can transmit the light in the ultraviolet band
  • the plurality of second photosensitive devices can realize the detection of the light in the ultraviolet band in the ambient light.
  • the plurality of second photosensitive devices can detect the light intensity of the dark environment under the light-shielding ink layer, so as to provide a comparative reference for the detection results of the first photosensitive devices extending along the boundary line between the display area AA and the peripheral circuit.
  • the plurality of second photosensitive devices are extended and distributed in a strip shape along the border of the non-display area away from the display area.
  • a plurality of first photosensitive devices are connected in parallel, and the plurality of first photosensitive devices form at least one row in a direction of extension and distribution.
  • a plurality of second photosensitive devices are connected in parallel, and the plurality of second photosensitive devices form at least one row in a direction of extension and distribution.
  • a display screen including the display panel according to the first aspect, and a cover disposed on the display panel.
  • an electronic device including the display screen in the second aspect, and a PCB connected to the display screen.
  • FIG. 1 is a schematic structural diagram of an electronic device provided by an embodiment of the present application.
  • FIG. 2 is a schematic structural diagram of a smart watch provided by an embodiment of the present application.
  • FIG. 3 is a schematic structural diagram of a display screen provided by an embodiment of the present application.
  • FIG. 4 provides a schematic diagram of the assembly structure of the display screen shown in FIG. 3 according to an embodiment of the present application
  • FIG. 5 is a schematic structural diagram of a display screen provided by an embodiment of the present application.
  • FIG. 6 is a schematic structural diagram of a display screen provided by another embodiment of the present application.
  • Fig. 7 provides the embodiment of the present application as shown in Fig. 6
  • Fig. 8 is another embodiment of the present application providing the schematic diagram of the sectional structure of the display screen at AA' as shown in Fig. 6;
  • FIG. 9 is a schematic structural diagram of a display screen provided by another embodiment of the present application.
  • Fig. 10 provides a schematic cross-sectional structure diagram of the display screen at AA' as shown in Fig. 9 for an embodiment of the present application;
  • Fig. 11 is a schematic structural diagram of a display screen provided by another embodiment of the present application.
  • Fig. 12 is a schematic structural diagram of a display screen provided by yet another embodiment of the present application.
  • Fig. 13 provides a schematic cross-sectional structural view of the display screen at AA' as shown in Fig. 12 for an embodiment of the present application;
  • FIG. 14 is a schematic structural diagram of a display screen provided by another embodiment of the present application.
  • Fig. 15 provides a schematic cross-sectional structure diagram of the display screen at AA' as shown in Fig. 14 for an embodiment of the present application;
  • FIG. 16 is a schematic diagram of an arrangement of a photosensitive device provided by an embodiment of the present application.
  • Fig. 17 is a schematic diagram of an arrangement of a photosensitive device provided by another embodiment of the present application.
  • Fig. 18 is a schematic structural diagram of a photosensitive device provided by an embodiment of the present application.
  • FIG. 19 is a schematic structural diagram of a circuit including a photosensitive device provided by an embodiment of the present application.
  • FIG. 20 is a schematic structural diagram of a circuit including a photosensitive device provided by another embodiment of the present application.
  • Fig. 21 is a schematic structural diagram of a photosensitive device provided by another embodiment of the present application.
  • FIG. 22 is a schematic structural diagram of an LCD panel provided by an embodiment of the present application.
  • FIG. 23 is a schematic structural diagram of an AMOLED display panel provided by an embodiment of the present application.
  • Fig. 24 is a schematic structural diagram of a photosensitive device provided by another embodiment of the present application.
  • Fig. 25 is a schematic diagram of the principle of a photosensitive device provided by an embodiment of the present application.
  • FIG. 26 is a schematic diagram of an equivalent circuit of a photosensitive device provided by an embodiment of the present application.
  • FIG. 27 is a schematic diagram of a connection relationship of a photosensitive device provided by an embodiment of the present application.
  • first”, second, etc. are used for convenience of description only, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of indicated technical features.
  • a feature defined as “first”, “second”, etc. may expressly or implicitly include one or more of that feature.
  • at least one means one or more
  • multiple means two or more.
  • “And/or” describes the association relationship of associated objects, indicating that there may be three types of relationships, for example, A and/or B, which can mean: A exists alone, A and B exist simultaneously, and B exists alone, where A, B can be singular or plural.
  • At least one of the following or similar expressions refer to any combination of these items, including any combination of single or plural items.
  • at least one item (piece) of a, b, or c can represent: a, b, c, a-b, a-c, b-c, or a-b-c, where a, b, c can be single or multiple .
  • connection should be understood in a broad sense, for example, “connection” can be a fixed connection, a detachable connection, or an integral body; it can be a direct connection, or It can be connected indirectly through an intermediary.
  • electrical connection may be a direct electrical connection or an indirect electrical connection through an intermediary.
  • the display panel and display screen provided by the embodiments of the present application can be applied to mobile phones, tablet computers, notebook computers, ultra-mobile personal computers (ultra-mobile personal computer, UMPC), handheld computers, netbooks, personal digital assistants (personal digital assistants) , PDA), wearable electronic devices, virtual reality devices and other electronic devices, the embodiment of the present application does not impose any limitation on this.
  • FIG. 1 shows a schematic structural diagram of an electronic device 100 .
  • the electronic device 100 may include a processor 110, an external memory interface 120, an internal memory 121, a universal serial bus (universal serial bus, USB) interface 130, a charging management module 140, a power management module 141, a battery 142, an antenna 1, and an antenna 2 , mobile communication module 150, wireless communication module 160, audio module 170, speaker 170A, receiver 170B, microphone 170C, earphone jack 170D, sensor module 180, camera 190 and display screen 191, etc.
  • a processor 110 an external memory interface 120, an internal memory 121, a universal serial bus (universal serial bus, USB) interface 130, a charging management module 140, a power management module 141, a battery 142, an antenna 1, and an antenna 2 , mobile communication module 150, wireless communication module 160, audio module 170, speaker 170A, receiver 170B, microphone 170C, earphone jack 170D, sensor module 180, camera 190 and display screen 191, etc.
  • USB universal serial bus
  • the structure shown in the embodiment of the present invention does not constitute a specific limitation on the electronic device 100 .
  • the electronic device 100 may include more or fewer components than shown in the figure, or combine certain components, or separate certain components, or arrange different components.
  • the illustrated components can be realized in hardware, software or a combination of software and hardware.
  • the processor 110 may include one or more processing units, for example: the processor 110 may include an application processor (application processor, AP), a modem processor, a graphics processing unit (graphics processing unit, GPU), an image signal processor (image signal processor, ISP), controller, video codec, digital signal processor (digital signal processor, DSP), baseband processor, and/or neural network processor (neural-network processing unit, NPU), etc. Wherein, different processing units may be independent devices, or may be integrated in one or more processors.
  • application processor application processor, AP
  • modem processor graphics processing unit
  • GPU graphics processing unit
  • image signal processor image signal processor
  • ISP image signal processor
  • controller video codec
  • digital signal processor digital signal processor
  • baseband processor baseband processor
  • neural network processor neural-network processing unit
  • a memory may also be provided in the processor 110 for storing instructions and data.
  • the memory in processor 110 is a cache memory.
  • the memory may hold instructions or data that the processor 110 has just used or recycled. If the processor 110 needs to use the instruction or data again, it can be called directly from the memory. Repeated access is avoided, and the waiting time of the processor 110 is reduced, thereby improving the efficiency of the system.
  • processor 110 may include one or more interfaces.
  • the interface may include an integrated circuit (inter-integrated circuit, I2C) interface, an integrated circuit built-in audio (inter-integrated circuit sound, I2S) interface, a pulse code modulation (pulse code modulation, PCM) interface, a universal asynchronous transmitter (universal asynchronous receiver/transmitter, UART) interface, mobile industry processor interface (mobile industry processor interface, MIPI), general-purpose input and output (general-purpose input/output, GPIO) interface, subscriber identity module (subscriber identity module, SIM) interface, and /or universal serial bus (universal serial bus, USB) interface, etc.
  • I2C integrated circuit
  • I2S integrated circuit built-in audio
  • PCM pulse code modulation
  • PCM pulse code modulation
  • UART universal asynchronous transmitter
  • MIPI mobile industry processor interface
  • GPIO general-purpose input and output
  • subscriber identity module subscriber identity module
  • SIM subscriber identity module
  • USB universal serial bus
  • the charging management module 140 is configured to receive a charging input from a charger.
  • the charger may be a wireless charger or a wired charger.
  • the charging management module 140 can receive charging input from the wired charger through the USB interface 130 .
  • the charging management module 140 may receive a wireless charging input through a wireless charging coil of the electronic device 100 . While the charging management module 140 is charging the battery 142 , it can also provide power for electronic devices through the power management module 141 .
  • the power management module 141 is used for connecting the battery 142 , the charging management module 140 and the processor 110 .
  • the power management module 141 receives the input from the battery 142 and/or the charging management module 140 to provide power for the processor 110 , the internal memory 121 , the display screen 191 , the camera 190 , and the wireless communication module 160 .
  • the power management module 141 can also be used to monitor parameters such as battery capacity, battery cycle times, and battery health status (leakage, impedance).
  • the power management module 141 may also be disposed in the processor 110 .
  • the power management module 141 and the charging management module 140 may also be set in the same device.
  • the wireless communication function of the electronic device 100 can be realized by the antenna 1, the antenna 2, the mobile communication module 150, the wireless communication module 160, the modem processor and the baseband processor.
  • Antenna 1 and Antenna 2 are used to transmit and receive electromagnetic wave signals.
  • Each antenna in electronic device 100 may be used to cover single or multiple communication frequency bands. Different antennas can also be multiplexed to improve the utilization of the antennas.
  • Antenna 1 can be multiplexed as a diversity antenna of a wireless local area network.
  • the antenna may be used in conjunction with a tuning switch.
  • the mobile communication module 150 can provide wireless communication solutions including 2G/3G/4G/5G applied on the electronic device 100 .
  • the mobile communication module 150 may include one or more filters, switches, power amplifiers, low noise amplifiers (low noise amplifier, LNA) and the like.
  • the mobile communication module 150 can receive electromagnetic waves through the antenna 1, filter and amplify the received electromagnetic waves, and send them to the modem processor for demodulation.
  • the mobile communication module 150 can also amplify the signals modulated by the modem processor, and convert them into electromagnetic waves through the antenna 1 for radiation.
  • at least part of the functional modules of the mobile communication module 150 may be set in the processor 110 .
  • at least part of the functional modules of the mobile communication module 150 and at least part of the modules of the processor 110 may be set in the same device.
  • a modem processor may include a modulator and a demodulator.
  • the modulator is used for modulating the low-frequency baseband signal to be transmitted into a medium-high frequency signal.
  • the demodulator is used to demodulate the received electromagnetic wave signal into a low frequency baseband signal. Then the demodulator sends the demodulated low-frequency baseband signal to the baseband processor for processing.
  • the low-frequency baseband signal is passed to the application processor after being processed by the baseband processor.
  • the application processor outputs a sound signal through an audio device (not limited to a speaker 170A, a receiver 170B, etc.), or displays an image or video through a display screen 191 .
  • the modem processor may be a stand-alone device. In some other embodiments, the modem processor may be independent from the processor 110, and be set in the same device as the mobile communication module 150 or other functional modules.
  • the wireless communication module 160 can provide wireless local area network (wireless local area networks, WLAN) (such as wireless fidelity (wireless fidelity, Wi-Fi) network), bluetooth (Bluetooth, BT), global navigation satellite System (global navigation satellite system, GNSS), frequency modulation (frequency modulation, FM), near field communication technology (near field communication, NFC), infrared technology (infrared, IR) and other wireless communication solutions.
  • the wireless communication module 160 may be one or more devices integrating one or more communication processing modules.
  • the wireless communication module 160 receives electromagnetic waves via the antenna 2 , frequency-modulates and filters the electromagnetic wave signals, and sends the processed signals to the processor 110 .
  • the wireless communication module 160 can also receive the signal to be sent from the processor 110 , frequency-modulate it, amplify it, and convert it into electromagnetic waves through the antenna 2 for radiation.
  • the antenna 1 of the electronic device 100 is coupled to the mobile communication module 150, and the antenna 2 is coupled to the wireless communication module 160, so that the electronic device 100 can communicate with the network and other devices through wireless communication technology.
  • the wireless communication technology may include global system for mobile communications (GSM), general packet radio service (general packet radio service, GPRS), code division multiple access (code division multiple access, CDMA), broadband Code division multiple access (wideband code division multiple access, WCDMA), time division code division multiple access (time-division code division multiple access, TD-SCDMA), long term evolution (long term evolution, LTE), BT, GNSS, WLAN, NFC , FM, and/or IR techniques, etc.
  • GSM global system for mobile communications
  • GPRS general packet radio service
  • code division multiple access code division multiple access
  • CDMA broadband Code division multiple access
  • WCDMA wideband code division multiple access
  • time division code division multiple access time-division code division multiple access
  • TD-SCDMA time-division code division multiple access
  • the GNSS may include a global positioning system (global positioning system, GPS), a global navigation satellite system (global navigation satellite system, GLONASS), a Beidou navigation satellite system (beidou navigation satellite system, BDS), a quasi-zenith satellite system (quasi -zenith satellite system (QZSS) and/or satellite based augmentation systems (SBAS).
  • GPS global positioning system
  • GLONASS global navigation satellite system
  • Beidou navigation satellite system beidou navigation satellite system
  • BDS Beidou navigation satellite system
  • QZSS quasi-zenith satellite system
  • SBAS satellite based augmentation systems
  • the electronic device 100 realizes the display function through the GPU, the display screen 191, and the application processor.
  • the GPU is a microprocessor for image processing, and is connected to the display screen 191 and the application processor. GPUs are used to perform mathematical and geometric calculations for graphics rendering.
  • Processor 110 may include one or more GPUs that execute program instructions to generate or change display information.
  • the display screen 191 is used to display images, videos and the like.
  • the display screen 191 includes a display panel.
  • the display panel can be a liquid crystal display (LCD), an organic light-emitting diode (OLED), an active matrix organic light emitting diode or an active matrix organic light emitting diode (active-matrix organic light emitting diode, AMOLED), flexible light-emitting diode (flex light-emitting diode, FLED), Miniled, MicroLed, Micro-oLed, quantum dot light emitting diodes (quantum dot light emitting diodes, QLED), etc.
  • the electronic device 100 may include 1 or N display screens 191 , where N is a positive integer greater than 1.
  • the electronic device 100 can realize the shooting function through the ISP, the camera 190 , the video codec, the GPU, the display screen 191 and the application processor.
  • the ISP is used for processing data fed back by the camera 190 .
  • the light is transmitted to the photosensitive element of the camera through the lens, and the light signal is converted into an electrical signal, and the photosensitive element of the camera transmits the electrical signal to the ISP for processing, and converts it into an image visible to the naked eye.
  • ISP can also perform algorithm optimization on image noise, brightness, and skin color. ISP can also optimize the exposure, color temperature and other parameters of the shooting scene.
  • the ISP may be located in the camera 190 .
  • Camera 190 is used to capture still images or video.
  • the object generates an optical image through the lens and projects it to the photosensitive element.
  • the photosensitive element may be a charge coupled device (CCD) or a complementary metal-oxide-semiconductor (CMOS) phototransistor.
  • CMOS complementary metal-oxide-semiconductor
  • the photosensitive element converts the light signal into an electrical signal, and then transmits the electrical signal to the ISP to convert it into a digital image signal.
  • the ISP outputs the digital image signal to the DSP for processing.
  • DSP converts digital image signals into standard RGB, YUV and other image signals.
  • the electronic device 100 may include 1 or N cameras 190, where N is a positive integer greater than 1.
  • the external memory interface 120 can be used to connect an external memory card, such as a Micro SD card, so as to expand the storage capacity of the electronic device 100.
  • the external memory card communicates with the processor 110 through the external memory interface 120 to implement a data storage function. Such as saving music, video and other files in the external memory card.
  • the internal memory 121 may be used to store one or more computer programs including instructions.
  • the processor 110 can implement various functional applications and data processing by executing the above-mentioned instructions stored in the internal memory 121 .
  • the internal memory 121 may include an area for storing programs and an area for storing data.
  • the stored program area can store an operating system; the stored program area can also store one or more application programs (such as a gallery, contacts, etc.) and the like.
  • the storage data area can store data (such as photos, contacts, etc.) created during the use of the electronic device 101 .
  • the internal memory 121 may include a high-speed random access memory, and may also include a non-volatile memory, such as one or more disk storage devices, flash memory devices, universal flash storage (universal flash storage, UFS) and the like.
  • the processor 110 enables the electronic device 100 to execute various functional applications and data processing by executing instructions stored in the internal memory 121 and/or instructions stored in a memory provided in the processor.
  • the electronic device 100 can implement audio functions through the audio module 170 , the speaker 170A, the receiver 170B, the microphone 170C, the earphone interface 170D, and the application processor. Such as music playback, recording, etc.
  • the audio module 170 is used to convert digital audio information into analog audio signal output, and is also used to convert analog audio input into digital audio signal.
  • the audio module 170 may also be used to encode and decode audio signals.
  • the audio module 170 may be set in the processor 110 , or some functional modules of the audio module 170 may be set in the processor 110 .
  • Speaker 170A also referred to as a "horn" is used to convert audio electrical signals into sound signals.
  • Electronic device 100 can listen to music through speaker 170A, or listen to hands-free calls.
  • Receiver 170B also called “earpiece” is used to convert audio electrical signals into sound signals.
  • the receiver 170B can be placed close to the human ear to receive the voice.
  • the microphone 170C also called “microphone” or “microphone” is used to convert sound signals into electrical signals. When making a phone call or sending a voice message, the user can put his mouth close to the microphone 170C to make a sound, and input the sound signal to the microphone 170C.
  • the electronic device 100 may be provided with one or more microphones 170C. In some other embodiments, the electronic device 100 may be provided with two microphones 170C, except for collecting sound signals. Noise reduction is also available. In some other embodiments, the electronic device 100 can also be provided with three, four or more microphones 170C to collect sound signals, reduce noise, identify sound sources, and realize directional recording functions, etc.
  • the earphone interface 170D is used for connecting wired earphones.
  • the earphone interface 170D can be a USB interface 130, or a 3.5mm open mobile terminal platform (OMTP) standard interface, or a cellular telecommunications industry association of the USA (CTIA) standard interface.
  • OMTP open mobile terminal platform
  • CTIA cellular telecommunications industry association of the USA
  • the sensor module 180 may include a pressure sensor, a gyroscope sensor, an air pressure sensor, a magnetic sensor, an acceleration sensor, a distance sensor, a proximity light sensor, a fingerprint sensor, a temperature sensor, a touch sensor, an ambient light sensor (that is, the light sensors), bone conduction sensors, etc.
  • Touch sensor also known as "touch device”.
  • the touch sensor can be arranged on the display screen 191, and the touch sensor and the display screen 191 form a touch screen, also called “touch screen”.
  • the touch sensor is used to detect a touch operation on or near it.
  • the touch sensor can pass the detected touch operation to the application processor to determine the type of touch event.
  • Visual output related to the touch operation may be provided through the display screen.
  • a touch panel with a touch sensor array formed by a plurality of touch sensors may also be installed on the surface of the display panel in a hanging form.
  • the location of the touch sensor and the display screen 191 may also be different.
  • the form of the touch sensor is not limited, for example, it may be a capacitor or a piezoresistor.
  • the above-mentioned electronic device may further include one or more components such as a key, a motor, an indicator, and a subscriber identification module (subscriber identification module, SIM) card interface, which is not limited in this embodiment of the present application.
  • a subscriber identification module subscriber identification module, SIM
  • the display screen 191 is arranged between the outer frame 21 of the watch and the bottom cover (not shown in FIG. 2 ).
  • the display screen includes a display panel 31, and the display panel 31 includes an active area (AA) and a non-display area NA (also referred to as a border) located around the display area AA.
  • AA active area
  • NA non-display area
  • a cover plate is also provided in the light emitting direction of the display panel 31, wherein a light-shielding ink layer is included between the cover plate and the display panel 31, wherein the projection of the light-shielding ink layer on the display panel 31 is located in the non-display area NA;
  • the shading ink layer blocks the non-display area, and the cover plate contains the visible area (view area, VA) and the ink area (that is, the area corresponding to the shading ink layer on the cover plate) where the display area AA can be seen, because the cover plate
  • the visible area VA is usually larger than the display area AA, that is, there is a gap between the ink area and the display area AA, as shown in Figure 3.
  • the display area AA is provided with a pixel array composed of a plurality of pixel units distributed in an array.
  • the display area AA includes driving lines arranged in a vertical and horizontal direction, and the driving lines include scanning lines SCAN and data lines DATA, wherein the pixel units are arranged at the crossing positions of the scanning lines SCAN and data lines DATA, and one pixel unit is connected to one data line DATA and at least one scan line SCAN.
  • the display screen also includes a chip-on-film (chin on film, COF, that is, a flexible circuit film with a chip, referred to as a chip-on-film, also known as a chip-on-chip film) 32 and a flexible printed circuit (FPC, or flexible circuit board) 33.
  • a chip-on-film chin on film, COF, that is, a flexible circuit film with a chip, referred to as a chip-on-film, also known as a chip-on-chip film
  • FPC flexible printed circuit
  • one drive line of any pixel unit in the pixel array is connected to one fan-out line of the display panel 31;
  • the display panel 31 is provided with a connection terminal 311, and the connection terminal 311 includes terminals of multiple fan-out lines of the display panel 31 ( pin, or pins), wherein COF32 and FPC33 are arranged on the back of display panel 31, and the connection end 311 of display panel 31 is bent to the back of display panel 31 and correspondingly connected to the connection end 321 of COF32.
  • the terminals of the connection end 311 and the terminals of the connection end 321 can be bonded one by one by using a FOF (film on film, film-to-film) process, and each terminal in the connection end 311 and the connection end 321 is in a one-to-one manner. Bonding together, so as to realize the bonding connection of the connection end 311 of the display panel 31 and the connection end 321 of the COF 32 .
  • FOF film on film, film-to-film
  • a display driver circuit 322 is provided on the COF 32, and the display driver circuit 322 may be a display driver integrated circuit (DDIC).
  • the terminals in the connecting end 321 of the COF 32 are electrically connected to the pins of the DDIC through the lines on the COF 32 .
  • connection end 323 of the COF32 is connected to the connection end 331 of the FPC33 by bonding, the terminal of the connection end 323 of the COF32 is electrically connected to the pin of the DDIC, and another group of connection ends 332 of the FPC33 are connected to the PCB printed circuit board (printed circuit board, PCB) connection, the terminals of the connection end 331 of the FPC33 are connected with the terminals of another group of connection ends 332 through the lines on the FPC33.
  • An application processor application processor, AP
  • AP application processor
  • AP application processor
  • PCB printed circuit board
  • the printed circuit board, COF32 and FPC32 are all arranged between the outer frame 21 of the watch on the back of the display panel and the bottom cover.
  • the display driving circuit 322 can also be integrated into the frame (NA area) of the display panel, of course, this will not be conducive to reducing the frame width of the display panel.
  • the AP provides display data for the DDIC and the display panel 31 to display actual image information;
  • the power IC provides the working voltage for the DDIC and the display panel 31.
  • FPC33 provides signal transmission connection path between PCB and DDIC.
  • the DDIC is responsible for receiving the signal transmitted by the PCB and sending the signal to the display panel 31 according to specific timing control. For example, after the display data output by the AP passes through the DDIC, it is converted into a scanning signal and a data voltage Vdata and transmitted to the pixel unit coupled to each driving line to drive the pixel unit to emit light.
  • the electronic devices such as the above-mentioned smart watches, smart bracelets, and mobile phones usually have the function of ambient light detection.
  • One of the main applications of the ambient light detection function is to automatically adjust the brightness of the screen by detecting the brightness of the ambient light. very good experience.
  • the ambient light detection function is also used in scenarios such as light intensity detection and touch control.
  • the ambient light detection mainly depends on placing an ambient light sensor (atmosphere light sensor, ALS) under the display panel of the electronic device.
  • the display screen includes a display panel and a cover plate. There is an ink area under the display panel, and the projection position of the ink area on the display panel just covers the driving circuit on the display panel.
  • the ALS is placed under the display panel, and the light in the environment can reach through the visible area (view area, VA) of the cover plate on the display panel and the display area (active area, AA, operable area or display area) of the display panel
  • the photosensitive area of the ALS is received by the ALS to detect ambient light, but in this structure, since the ALS needs to be placed under the display panel, the thickness of the module is relatively high; in addition, due to the shading of the display panel, it will be greatly reduced. light transmittance, thus requiring a more sensitive light sensor.
  • a display screen is provided, wherein the display screen includes a display panel 41 integrated with a light sensor in the screen,
  • the display panel 41 includes a display area AA and a non-display area NA (or frame).
  • the non-display area NA is located around the display area AA (a circular display panel is taken as an example in FIG. 6 , of course, other irregular-shaped display panels such as polygonal and elliptical are also possible).
  • a peripheral circuit 411 is provided in the non-display area NA (wherein the peripheral circuit may include the above-mentioned fan-out circuit and a display driving circuit, of course, in some narrow bezel products, the display driving circuit may also be placed on the COF), in the display Array-distributed pixel units are arranged in the area AA.
  • a light sensor 412 is arranged between the display area AA and the peripheral circuit; .
  • the photosensitive device 412-n is connected to the PCB through the fan-out line of the non-display area NA (the specific fan-out line may be connected through the flexible substrate between the display panel 41 and the PCB), wherein, the PCB is provided with There are chips or circuits that process the signal from the photosensitive device or provide a signal to the photosensitive device.
  • the light sensor 412 is integrated on the display panel 41, when the display panel 41 is assembled as a display screen, the thickness of the module of the display screen can be reduced, thereby reducing the number of electronic devices using the display screen. The product thickness of the device.
  • the light can directly reach the light sensor 412 on the display panel 41 after passing through the cover plate, instead of passing through the display panel 41 and then reaching the light sensor 412, which reduces the requirement for the sensitivity of the light sensor 412, and, because the light sensor
  • the multiple photosensitive devices 412-n of 412 are arranged on the display panel 41 in a manner of extending and distributing along the boundary line between the display area AA and the peripheral circuit 411, which has no effect on the industrial design of the cover plate 42 and the light-shielding ink layer 43 protecting the display panel 41.
  • the display panel 41 is usually provided with a cover plate 42 to protect the display panel, and for the sake of beautiful appearance, a light-shielding device that blocks the non-display area NA of the display panel 41 is usually provided between the display panel 41 and the cover plate 42 Ink layer 43, in order to reduce the influence of photosensor 412 on the aperture ratio of display panel 41, usually photosensor 412 cannot be arranged in display area AA.
  • the corresponding coupling design of the shape is to remove the light-shielding ink layer 43 of the light sensor 412 or design it as an ink material for filtering a specified light wavelength band, so that the requirement for the alignment accuracy of the coupling between the light-shielding ink layer 43 and the light sensor 412 is improved.
  • a cover plate 42 is also provided on the display panel 41, and a light-shielding ink layer 43 is included between the cover plate 42 and the display panel 41, as shown in FIG. 6 and FIG. 7, wherein the display panel 41 includes a display The area AA and the non-display area NA.
  • the non-display area NA is provided with a peripheral circuit 411 and a photosensor 412 (including a plurality of photosensitive devices 412-n).
  • the projection of the light-shielding ink layer 43 on the display panel 41 is located in the non-display area NA.
  • the area of the light-shielding ink layer 43 outside the projected area of the cover plate 42 is the visible area VA.
  • a plurality of photosensitive devices 412 - n are distributed between the projection area of the light-shielding ink layer 43 on the display panel 41 and the display area AA.
  • the plurality of photosensitive devices 412-n are distributed in the visible area VA, and the visible area VA is not blocked by the light-shielding ink layer 43, the ambient light can be irradiated to the plurality of photosensitive devices 412-n through the cover plate 42, thereby achieving environmental protection. light detection.
  • a cover plate 42 is provided on the display panel 41, wherein a filter ink layer 44 is also included between the cover plate 42 and the display panel 41, and the filter ink layer 44 absorbs light in the ultraviolet band, filters
  • the photo-ink layer 44 covers the area between the display area AA and the peripheral circuit 411, that is, the area where the plurality of photosensitive devices 412-n are located.
  • the filter ink layer 44 absorbs the light of the ultraviolet band, the light of the ultraviolet band in the ambient light will be absorbed, and the light passing through the filter ink layer 44 may include the visible light band (such as the wavelength range of 400nm to 700nm) and light in other light bands (such as infrared light bands), so that the detection of visible light in ambient light and light in other light bands can be realized.
  • the filter ink layer 44 can be set up for a week along the area between the display area AA and the peripheral circuit 411, so that the influence of the filter ink layer 44 on the industrial design of the product appearance can be reduced as far as possible, and there is no need to consider the connection with multiple photosensitive devices 412.
  • the coupling alignment of -n reduces the difficulty of assembly.
  • Figure 10 is a cross-sectional view at AA' in Figure 9.
  • the display panel 41 is provided with a cover plate 42, wherein a light-shielding ink layer 43 is included between the cover plate 42 and the display panel 41, wherein the projection of the light-shielding ink layer 43 on the display panel 41 is located in the non-display area NA; wherein, the light sensor 412 A plurality of photosensitive devices 412 - n are distributed in the projection area of the light-shielding ink layer 43 on the display panel 41 , wherein the light-shielding ink layer 43 transmits light in the ultraviolet band.
  • the filter ink layer transmits the light in the ultraviolet band, the detection of the light in the ultraviolet band in the ambient light can be realized.
  • the plurality of photosensitive devices 412-n may be distributed on the side close to the display area AA in the projection area of the light-shielding ink layer 43 on the display panel 41 .
  • a photosensitive device 412-n for detecting visible light in ambient light and light of other light bands and a photosensitive device for detecting light of ultraviolet light can be distributed on the display panel 41 at the same time. 412-n.
  • Figure 12 wherein Figure 13 is a cross-sectional view at AA' in Figure 12.
  • the plurality of photosensitive devices 412 - n photosensitive devices may also be distributed on the side away from the display area AA in the projection area of the light-shielding ink layer 43 on the display panel 41 .
  • the light sensor 412 also includes a plurality of photosensitive devices 412-i
  • the display panel 41 is provided with a cover plate 42, wherein a light-shielding ink layer 43 is included between the cover plate 42 and the display panel 41, wherein The projection of the light-shielding ink layer 43 on the display panel 41 is located in the non-display area NA; a plurality of photosensitive devices 412 - i are distributed in the projection area of the light-shielding ink layer 43 on the display panel 41 .
  • the plurality of photosensitive devices 412-i shown in FIG. 14 and FIG. 15 extend in a strip shape in the non-display area NA and away from the boundary of the display area AA.
  • the plurality of photosensitive devices 412-i are not limited to the structure shown in the figure, there can be more or less, and they can also be close to the display area AA. Any arrangement of the plurality of photosensitive devices 412-i in any position of the non-display area NA belongs to this The scope of protection applied for. Since the plurality of photosensitive devices 412-i are blocked by the light-shielding ink layer 43, they cannot be observed from the cover plate 42, and thus do not affect the industrial design of the product. A plurality of photosensitive devices 412-i are distributed in strips extending along the boundary of the non-display area NA away from the display area AA.
  • Figure 16 and Figure 17 provide the arrangement of multiple photosensitive devices in the embodiment of the present application, the multiple photosensitive devices of the present application are connected in parallel, and the multiple photosensitive devices form at least one row in the direction of extension and distribution.
  • Figure 16 shows that a plurality of photosensitive devices in the embodiment of the present application can be arranged in a row in the direction of extending distribution
  • Figure 17 shows that a plurality of photosensitive devices in the embodiment of the present application can be arranged in the direction of extending distribution Arranged in two rows.
  • the parallel connection method can make the photocurrent detected by each photosensitive device directly superimpose, thereby improving the accuracy of light intensity detection.
  • the number of photosensitive devices can be designed according to the detection accuracy required by the actual setting, which is not limited here.
  • 16 and 17 take the photosensitive device as a two-port device as an example, wherein the input end of the photosensitive device is connected to the fan-out line 1 , and the output end of the photosensitive device is connected to the fan-out line 2 .
  • the photosensitive device mentioned above may be any one of photosensitive devices such as photoresistors and photodiodes.
  • the photosensitive device can be a photosensitive resistor, as shown in Figure 18.
  • the photosensitive resistor includes a photoconductor and two electrodes arranged at both ends of the photoconductor. These two electrodes have no polarity difference, that is, the left and right sides of the photosensitive resistor Both positive and reverse connections of the electrodes can work normally, so that the fan-out line 1 and the fan-out line 2 are respectively connected to the two electrodes of the photoresistor.
  • the photoresistor also known as the light guide, is a purely resistive element. Its working principle is based on the photoconductive effect. When there is no light, the resistance passing through the photoconductor is very large, and the reverse current is very small, which is called dark current.
  • E i in the two figures is the initial voltage
  • R a is the photoresistor
  • R b is the common resistance
  • U 0 represents the voltage value of the electrical signal detected
  • the circuit connection method in which the light intensity is proportional to the voltage value U 0 provided in Figure 19 that is, the stronger the light, the smaller the resistance R a of the photoresistor, the larger the current I in the circuit, and the larger the value of the voltage U 0
  • Figure 20 provides a circuit connection method in which the light intensity is inversely proportional to the voltage value U 0 , That is, the stronger the light, the smaller the resistance value R a of the photoresistor, the larger the current I in the circuit, and the smaller the value of the voltage U 0 .
  • the photosensitive device may be a photosensitive diode, which is also called a photodiode, as shown in FIG. 21 .
  • the core component of the photodiode is a PN junction. When there is no light irradiation, the photodiode has a large reverse resistance and a small reverse current, and the photodiode is in a cut-off state. Reverse current is also called dark current.
  • the vicinity of the PN junction is bombarded by photons, absorbing its energy to generate electron-hole pairs, so that the minority carrier concentration in the P and N regions is greatly increased, so under the effect of external reverse bias and internal electric field
  • the minority carriers in the P region enter the N region through the barrier layer
  • the minority carriers in the N region enter the P region through the barrier layer, so that the reverse current through the PN junction is greatly increased, which forms a photon junction.
  • the fan-out line 1 and the fan-out line 2 are respectively connected to the P region and the N region of the PN junction.
  • the above-mentioned photosensitive device can be formed by reusing the traditional TFT production process in the display panel.
  • the display panel mainly includes a display substrate and an opposite substrate.
  • the display function film layer is composed of multiple film layers. Different types of display panels with different functions have different display function film layers.
  • the display panel is a liquid crystal display (liquid crystal display,
  • An LCD) panel or an active matrix organic light emitting diode (AMOLED) display panel is taken as an example for description.
  • FIG. 22 is a schematic structural diagram of an LCD panel provided by an embodiment of the present application.
  • an LCD panel it mainly includes a base substrate 61, a circuit film layer 62, a pixel electrode layer 63, a lower alignment film layer 64, a liquid crystal layer 65, an upper alignment film layer 66, a common electrode layer 67, a color filter layer 68 and an opposite to the substrate 69 etc.
  • the base substrate 61 and the opposite substrate 62 may be made of transparent materials, such as glass.
  • the circuit film layer 62, the pixel electrode layer 63, the lower alignment film layer 64, the liquid crystal layer 65, the upper alignment film layer 66, the common electrode layer 67 and the color filter layer 68 can be collectively referred to as the display function film layer.
  • FIG. 22 is just an example of one of the LCD panels.
  • the circuit film layer 62 is mainly provided with a thin film field effect transistor (thin film transistor, TFT) and various wires.
  • TFT thin film field effect transistor
  • the circuit film layer 62 may include a semiconductor layer 621, a first insulating layer 622, a gate electrode 623, a second insulating layer 624, a source electrode 625, and a drain electrode 626; wherein the material of the semiconductor layer 621 It can be semiconductor materials such as amorphous silicon/polysilicon/oxide.
  • the electrode contact region and the channel region of the TFT can be formed by doping the semiconductor layer 621 with different materials and concentrations.
  • the electrode contact region is generally a P-type heavily doped region (P+), and the channel region is generally a P-type lightly doped region. Doped region (P-).
  • the source electrode 625 and the drain electrode 626 of the TFT are electrically connected to the electrode contact regions, respectively.
  • FIG. 23 is a schematic structural diagram of an AMOLED display panel provided by an embodiment of the present application.
  • an AMOLED display panel it mainly includes a base substrate 71 , a circuit film layer 72 , an anode layer 73 , a pixel definition layer 74 , a light emitting layer 75 , a cathode layer 76 , and an opposite substrate 77 .
  • the base substrate 71 and the opposite substrate 72 can be formed of transparent materials, such as rigid substrates such as glass, or flexible substrates such as polyimide (PI), polycarbonate (PC), etc., which are not described here. limited.
  • the circuit film layer 72 , the anode layer 73 , the pixel defining layer 74 , the light emitting layer 75 and the cathode layer 76 can be collectively referred to as a display function film layer.
  • a display function film layer the structure of the display functional film layer in different types of AMOLED display panels may also be different.
  • Figure 23 is just an example of one of the AMOLED display panels where OLED spontaneously emits colored light. For example, in some AMOLED display In the panel, if the light emitted by the light-emitting layer is white light, a color filter layer is generally provided above the light-emitting layer, which will not be described here.
  • the circuit film layer 72 is also mainly provided with TFTs and various wires.
  • the circuit film layer 72 may include a semiconductor layer 721, a first insulating layer 722, a gate electrode 723, a second insulating layer 724, a source electrode 725, and a drain electrode 726; wherein the material of the semiconductor layer 721 It can be semiconductor materials such as amorphous silicon/polysilicon/oxide.
  • the electrode contact region and the channel region of the TFT can be formed by doping the semiconductor layer 721 with different materials and concentrations.
  • the electrode contact region is generally a P-type heavily doped region (P+), and the channel region is generally a P-type lightly doped region. Doped region (P-).
  • the source electrode 725 and the drain electrode 726 of the TFT are electrically connected to the electrode contact regions, respectively.
  • Both the above-mentioned LCD panel and the AMOLED display panel are provided with circuit film layers with TFTs. It is precisely because the above-mentioned display panels are provided with semiconductor layers and different doped regions in the semiconductor layers.
  • the present application can be used in the display panel.
  • the existing mask (mask) process of the display panel is used as far as possible to form, thereby reducing the number of increased mask processes.
  • the input electrode and the output electrode of the photosensitive device can be fabricated by a mask process using the first metal layer of the same layer as the source electrode 625 and the drain electrode 626 (source electrode 725 and drain electrode 726).
  • the gate can be made through a mask process with the second metal layer of the same layer as the gate electrode 623 (or gate electrode 723); the channel of the photosensitive device can be made with the semiconductor layer 621 (or the semiconductor layer Layer 721) is made of the same layer of material, and when the input electrode and the electrode contact area are included under the output electrode, the electrode contact area of the source electrode 625 and the drain electrode 626 (source electrode 725 and drain electrode 726) can also be used.
  • the semiconductor layer under the input electrode and the output electrode is doped and formed. Specifically, as shown in FIG.
  • a photosensitive device including a channel, input electrodes and output electrodes disposed at both ends of the channel; wherein, the input electrodes can be connected to Vcc through fan-out lines, and the output electrodes can be connected to Vcc through fan-out lines.
  • the outgoing line is connected to Vout.
  • the working principle of the photosensitive device also called photodiode
  • the reverse current in the channel region is very small (generally less than 0.1 microampere), which is called dark current.
  • one or more gates can be set on the channel, usually an insulating layer is set between the gate and the channel, and the gate can be connected to Vg through a fan-out line to provide supply voltage.
  • the photosensitive device when the photosensitive device is working, electron-hole pairs are mainly formed in the region (depletion region) of the channel region that is not blocked by the gate, and the concentration of electron-hole pairs formed is also different when the intensity of light absorbed is different.
  • the equivalent circuit diagram is shown in Figure 26.
  • the photosensitive device provided by the embodiments of the present application has high sensitivity due to its high resistance (equivalent resistance) in the depletion region, especially low dark current (leakage current) when no light is irradiated.
  • the magnitude of the dark current can be further adjusted by adjusting the voltage of the gate and the magnitude of the cross-voltage across the input electrode and the output electrode.
  • the parallel connection method is that the input electrodes of multiple photosensitive devices (1-n) are connected to the Vcc, output electrodes of multiple photosensitive devices (1-n) are connected to Vout through the same fan-out line, and gates of multiple photosensitive devices (1-n) are connected to Vg through the same fan-out line.
  • the width of multiple photosensitive devices arranged in a single row is about 30um, which basically meets the error requirements of the gap design between the visible area VA and the display area AA, and does not affect the industrial design of the product.

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Abstract

La présente invention concerne un panneau d'affichage (31), un écran d'affichage (191) et un dispositif électronique (100), le panneau d'affichage (31) comprenant : une région d'affichage (AA) et une région de non-affichage (NA) située autour de la région d'affichage (AA), la région de non-affichage (NA) étant pourvue d'un circuit périphérique (411), et la région d'affichage (AA) étant pourvue d'unités de pixel réparties dans un réseau. Sur la région de non-affichage (NA), un capteur de lumière (412) est disposé entre la zone d'affichage (AA) et le circuit périphérique (411) ; et le capteur de lumière (412) comprend une pluralité de premiers dispositifs photosensibles (412-n) qui s'étendent et sont répartis le long d'une ligne de frontière entre la région d'affichage (AA) et le circuit périphérique (411).
PCT/CN2022/084610 2021-06-30 2022-03-31 Panneau d'affichage, écran d'affichage et dispositif électronique WO2023273470A1 (fr)

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