WO2022257703A1 - 显示面板和显示设备 - Google Patents

显示面板和显示设备 Download PDF

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Publication number
WO2022257703A1
WO2022257703A1 PCT/CN2022/092730 CN2022092730W WO2022257703A1 WO 2022257703 A1 WO2022257703 A1 WO 2022257703A1 CN 2022092730 W CN2022092730 W CN 2022092730W WO 2022257703 A1 WO2022257703 A1 WO 2022257703A1
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Prior art keywords
area
light
light emitting
emitting device
sub
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Application number
PCT/CN2022/092730
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English (en)
French (fr)
Inventor
刘长瑜
Original Assignee
Oppo广东移动通信有限公司
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Application filed by Oppo广东移动通信有限公司 filed Critical Oppo广东移动通信有限公司
Priority to EP22819301.7A priority Critical patent/EP4345806A1/en
Publication of WO2022257703A1 publication Critical patent/WO2022257703A1/zh
Priority to US18/532,271 priority patent/US20240107841A1/en

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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
    • H10K59/10—OLED displays
    • H10K59/12—Active-matrix OLED [AMOLED] displays
    • H10K59/131—Interconnections, e.g. wiring lines or terminals
    • G—PHYSICS
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    • 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]
    • G—PHYSICS
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    • 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]
    • G—PHYSICS
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    • 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
    • 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
    • H10K59/121—Active-matrix OLED [AMOLED] displays characterised by the geometry or disposition of pixel elements
    • H10K59/1213—Active-matrix OLED [AMOLED] displays characterised by the geometry or disposition of pixel elements the pixel elements being TFTs
    • 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
    • H10K59/88—Dummy elements, i.e. elements having non-functional features
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    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/04—Structural and physical details of display devices
    • G09G2300/0404—Matrix technologies
    • G09G2300/0413—Details of dummy pixels or dummy lines in flat panels
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/04—Structural and physical details of display devices
    • G09G2300/0421—Structural details of the set of electrodes
    • G09G2300/0426—Layout of electrodes and connections
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
    • G09G2300/0809—Several active elements per pixel in active matrix panels
    • G09G2300/0819—Several active elements per pixel in active matrix panels used for counteracting undesired variations, e.g. feedback or autozeroing
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
    • G09G2300/0809—Several active elements per pixel in active matrix panels
    • G09G2300/0842—Several active elements per pixel in active matrix panels forming a memory circuit, e.g. a dynamic memory with one capacitor
    • G—PHYSICS
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    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
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    • G09G2300/0861—Several active elements per pixel in active matrix panels forming a memory circuit, e.g. a dynamic memory with one capacitor with additional control of the display period without amending the charge stored in a pixel memory, e.g. by means of additional select electrodes
    • G—PHYSICS
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    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0243—Details of the generation of driving signals
    • G09G2310/0251—Precharge or discharge of pixel before applying new pixel voltage
    • G—PHYSICS
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    • 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
    • G09G2320/0223—Compensation for problems related to R-C delay and attenuation in electrodes of matrix panels, e.g. in gate electrodes or on-substrate video signal electrodes
    • G—PHYSICS
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    • 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
    • G09G2320/0242—Compensation of deficiencies in the appearance of colours
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection

Definitions

  • the present application relates to the field of display technology, in particular to a display panel and a display device.
  • the under-screen camera can divide the display screen of the electronic device into a main screen area and a sub-screen area, and the sub-screen area is the area where the under-screen camera is placed. Since the light-emitting device in the sub-screen area is usually arranged in the visual area of the camera, the driving circuit of the light-emitting device is arranged on the periphery of the sub-screen area, and the light-emitting device and the driving circuit are connected through metal wiring. However, different metal traces will produce different degrees of RC delay (RC loading), which will easily cause color shift in the sub-screen area and greatly reduce the display effect of electronic devices.
  • RC delay RC loading
  • a display panel and a display device are provided.
  • a display panel comprising:
  • a plurality of pixel units each of which includes a plurality of light emitting devices
  • a plurality of drive circuits are respectively connected to the plurality of the light emitting devices through the plurality of drive wires, and each of the drive circuits is respectively used to output drive signals to the connected light emitting devices. the anode of the device;
  • the driving wiring length of each light emitting device in the same pixel unit is negatively correlated with the lighting time of the light emitting device, and the driving wiring is connected to the output end of the driving circuit and the light emitting device. traces between the anodes.
  • a display device comprising: a photosensitive device and the above-mentioned display panel; wherein, the photosensitive device is arranged corresponding to the light-transmitting area of the display panel.
  • FIG. 1 is a schematic diagram of a partial structure of a display device according to an embodiment
  • FIG. 2 is a schematic structural diagram of a display panel of an embodiment
  • Fig. 3 is a partially enlarged view of a light emitting device and a driving circuit of an embodiment
  • FIG. 4 is a schematic cross-sectional view of a driving circuit of an embodiment
  • Fig. 5 is a schematic structural diagram of the light-transmitting region, the first sub-outer region and the second sub-outer region;
  • Fig. 6 is one of the structural schematic diagrams of the light transmission area, the first external area and the second external area of an embodiment
  • Fig. 7 is the second structural schematic diagram of the light transmission area, the first outer area and the second outer area of an embodiment
  • FIG. 8 is a schematic diagram of an arrangement of pixels in a light-transmitting region according to an embodiment
  • FIG. 9 is a schematic diagram of the lighting sequence of light-emitting devices of multiple colors in the embodiment of FIG. 8;
  • FIG. 10 is one of the schematic diagrams of the driving wiring method of an embodiment
  • FIG. 11 is the second schematic diagram of the driving wiring method of an embodiment
  • FIG. 12 is a circuit diagram of a driving circuit of an embodiment.
  • Display panel 10; light-transmitting area: 11; first pixel area: 11a; second pixel area: 11b; external area: 12; first external area: 121; second external area: 122; first sub-area Outer area: 12a; second sub-outer area: 12b; third sub-outer area: 12c; fourth sub-outer area: 12d; pixel unit: 100; light-emitting device: 110; first light-emitting device: 110a; Second light emitting device: 110b; third light emitting device: 110c; drive circuit: 210; first drive circuit: 210a; second drive circuit: 210b; third drive circuit: 210c; gate: 2101; source: 2102; Drain: 2103; source contact structure: 2104; drain contact structure: 2105; anode reset unit: 211; gate reset unit: 212; data writing unit: 213; threshold compensation unit: 214; light emission control unit: 215 ; substrate: 311; buffer layer: 312; gate insulating layer: 313; interlayer
  • first, second and the like used in this application may be used to describe various elements herein, but these elements are not limited by these terms. These terms are only used to distinguish one element from another element.
  • a first direction could be termed a second direction, and, similarly, a second direction could be termed a first direction, without departing from the scope of the present application.
  • Both the first direction and the second direction are directions, but they are not the same direction.
  • first and second are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, the features defined as “first” and “second” may explicitly or implicitly include at least one of these features.
  • plural means at least two, such as two, three, etc., unless specifically defined otherwise.
  • severeal means at least one, such as one, two, etc., unless otherwise specifically defined.
  • a display device includes a display panel 10 and a photosensitive device 20 .
  • the display panel 10 includes an adjacent light-transmitting area 11 and an external area 12 .
  • the shape of the light-transmitting region 11 may be circular, rectangular, elliptical, polygonal, irregular, etc., which is not limited in the present invention.
  • the shape of the external area 12 may also be a ring, a rectangle, etc., which is not limited in the present invention.
  • the photosensitive device 20 is at least partially disposed corresponding to the light-transmitting region 11 .
  • the photosensitive device 20 may be disposed under the light-transmitting region 11 , and the photo-sensitive device 20 is used to transmit and/or receive optical signals through the light-transmitting region 11 of the display panel 10 .
  • the light-transmitting region 11 is a region located above the photosensitive device 20 . It should be noted that in the embodiment of the present application, upward refers to the direction from the rear case of the display device to the display screen, and downward refers to the direction from the display screen to the rear case.
  • the photosensitive device 20 realizes testing and control based on optical parameters by receiving light.
  • the photosensitive device 20 can be a camera, and the photosensitive device 20 can also be an ambient light sensor, an optical distance sensor (for example, an infrared sensor, a laser sensor, a proximity sensor, a distance sensor, an optical distance sensor), a structured light module, a time-of-flight sensor, etc. Time of flight (TOF) lens module, optical fingerprint sensor, etc.
  • TOF Time of flight
  • the photosensitive device 20 is used as a camera as an example for description.
  • the driving circuit is usually formed in multiple functional layers stacked, and the above multiple functional layers will reduce the incident light intensity of the camera, and even cause imaging diffraction problems, greatly affecting the imaging quality of the camera. Therefore, for the under-screen camera solution, by placing the driving circuit of the pixels in the display area corresponding to the camera outside the display area, the imaging quality can be effectively improved, thereby improving user experience.
  • FIG. 2 is a schematic structural diagram of a display panel 10 according to an embodiment.
  • the display panel 10 includes a plurality of pixel units 100 , a plurality of driving lines L and a plurality of driving circuits.
  • each of the pixel units 100 includes a plurality of light emitting devices (ie, diodes in the figure).
  • the number of light emitting devices included in each pixel unit 100 may be 2, 3, 4, etc., which may be specifically determined according to the desired display effect.
  • a larger number of light emitting devices 110 may be provided, for example, each pixel unit 100 includes four light emitting devices of different colors. It can be understood that the above numbers are only used for exemplary description, and are not used to limit the protection scope of this embodiment.
  • the pixel unit 100 in this embodiment includes two light emitting devices as an example for description, and the two light emitting devices are named as the first light emitting device 110a and the second light emitting device 110b respectively.
  • a plurality of driving circuits are respectively connected to a plurality of the light emitting devices in a one-to-one correspondence, and each of the driving circuits is respectively used to output a driving signal to the anodes of the connected light emitting devices.
  • the display panel 10 of this embodiment includes two kinds of driving circuits. That is, the two driving circuits are respectively the first driving circuit 210a and the second driving circuit 210b.
  • the first driving circuit 210a is connected to the anode of the first light emitting device 110a
  • the second driving circuit 210b is connected to the anode of the second light emitting device 110b, so as to respectively output driving signals to corresponding light emitting devices.
  • the wiring connected between the output terminal of the driving circuit and the anode of the light emitting device is defined as the driving wiring.
  • the color shift problem in the related art will be described. If the two light emitting devices are turned on at the same time, the color displayed by the pixel unit 100 is yellow. If the red light emitting device is turned on earlier than the green light emitting device, the color displayed by the pixel unit 100 is red before the green light emitting device is turned on. If the green light emitting device is turned on earlier than the red light emitting device, the color displayed by the pixel unit 100 is green before the red light emitting device is turned on.
  • the same moment is not limited to exactly the same moment, if the difference between the lighting moments of any two light-emitting devices in the same pixel unit 100 is less than a preset threshold, it can be understood as being at the same moment light up, the preset threshold may be, for example, 0.01 ms.
  • the lighting time refers to the time when the light emitting device reaches a stable target brightness, and the display driver chip respectively determines the target brightness of each light emitting device according to the picture to be displayed.
  • FIG. 3 is a partial enlarged view of the light-transmitting area and the external area of an embodiment.
  • Device 110a is electrically connected.
  • the second driving circuit 210b located in the external area 12 may also be electrically connected to the second light emitting device 110b located in the light-transmitting area 11 through the driving wiring L.
  • the driving wiring length of each light emitting device in the same pixel unit 100 is negatively correlated with the lighting time of the light emitting device, that is, the longer the lighting time of the light emitting device is, the longer the lighting time of the light emitting device is connected to the corresponding driving circuit.
  • the driving trace L may be a transparent metal wire, for example, an indium tin oxide (Indium Tin Oxide, ITO) metal wire, an aluminum zinc oxide (Alumina zinc oxide, AZO) metal wire, and the like.
  • ITO Indium Tin Oxide
  • Alumina zinc oxide Al zinc oxide
  • AZO aluminum zinc oxide
  • FIG. 4 is a schematic cross-sectional view of a driving circuit according to an embodiment, and the cross-sectional direction of FIG. 4 is perpendicular to the display surface of the display panel 10 .
  • the substrate may include polyimide (PI) substrates 311 and buffer layers 312 arranged alternately in sequence.
  • the substrate includes two polyimide (PI) substrates arranged alternately in sequence. imide (PI) substrate 311 and two buffer layers 312 . It can be understood that the substrate may also include more polyimide (PI) substrates 311 and buffer layers 312 .
  • the first driving circuit 210 a and the second driving circuit 210 b described above are also formed in the layer 315 .
  • the first driving circuit 210a includes a gate 2101, a source 2102, a drain 2103, a source contact structure 2104 and a corresponding drain contact structure 2105, and the anode layer in the first light emitting device 110a passes through the driving wiring L It is electrically connected with the source 2102 .
  • the second driving circuit 210b may also include a gate 2101, a source 2102, a drain 2103, a source contact structure 2104, and a drain contact structure 2105.
  • the anode layer in the second light emitting device 110b is also connected to the corresponding The source 2102 is electrically connected.
  • any driving trace will generate coupling with other traces, and RC delay (RC Loading) will be generated, thereby reducing the transmission speed of the driving signal on the driving trace. It is understandable that for some light-emitting devices with a long lighting time, RC loading will further delay the lighting time and cause the problem of worsening display color shift.
  • the transmission time of the driving signal to each light emitting device can be correspondingly changed. It can be understood that the total lighting time required from the driving circuit outputting the driving signal until the corresponding light emitting device is turned on is the sum of the transmission time and the lighting time. Therefore, different lighting durations can be compensated based on different transmission durations, so that the total lighting duration of each light emitting device in the same pixel unit is the same, thereby ensuring that the pixel unit can present accurate colors and brightness. That is, this embodiment provides a display panel with accurate color and better display effect.
  • each light-emitting device in this embodiment may be, but not limited to, organic light-emitting diodes (Organic light-emitting diodes, OLEDs), quantum dot light-emitting diodes (Quantum Dot Light Emitting Diodes, QLEDs) and micron-scale light-emitting diodes (Micro LEDs) Wait.
  • OLEDs Organic light-emitting diodes
  • QLEDs Quantum Dot Light Emitting Diodes
  • Micro LEDs micron-scale light-emitting diodes
  • each embodiment of the present application is described by taking the light-emitting device as an example of an organic light-emitting diode.
  • each light-emitting device can be an organic light-emitting diode of a different color, such as a red OLED, a green OLED, and a blue OLED. The display of different colors makes the display device realize full-color display.
  • each of the pixel units includes the light emitting devices of at least two colors
  • the display panel 10 includes a light-transmitting region 11 , a first sub-external region 12a and a second sub-region arranged along a first direction.
  • the first direction is a direction from the center of the light-transmitting area 11 to the outside of the light-transmitting area 11 . It should be noted that the light-transmitting area, the first sub-outside area, and the second sub-outside area can all display images.
  • FIG. 5 is a schematic structural diagram of the light-transmitting region 11, the first sub-outside region 12a, and the second sub-outside region 12b in an embodiment.
  • the shape of the light-transmitting region 11 It is circular, and the center of the light-transmitting region 11 is the center of the circle, and the direction from the center of the circle to the outside of the light-transmitting region 11 along any radius can be understood as the first direction.
  • the first sub-external area 12a is an annular structure disposed around the light-transmitting area 11
  • the second sub-external area 12b is an annular structure disposed around the first sub-external area 12a.
  • the outer contour of the second sub-outside region 12b is relatively neat, so it is easier to design compatible with other structures in the display panel 10.
  • Other structures in the display panel 10 may include display pixels in the main screen area, for example.
  • the display panel 10 in addition to the light-transmitting region 11 , the first sub-outside region 12 a and the second sub-outside region 12 b , the display panel 10 also includes a main screen region.
  • the main screen area is also an area that can be used to display images.
  • the transparent region 11 is provided with a plurality of pixel units (not shown).
  • the light-emitting device with the longest lighting time is the target light-emitting device, and the driving circuit 210 corresponding to the target light-emitting device is located in the first sub-external area 12a, and the same pixel
  • the driving circuits corresponding to the remaining light-emitting devices in the unit are respectively located in the second sub-external area 12b.
  • the lighting time of the light-emitting device is determined by characteristics such as the color of the device, the structure of the device, and the target brightness.
  • a pixel unit includes one red light emitting device, one green light emitting device and one blue light emitting device as an example. If it is necessary to display a white screen with 255 gray scales, the red light emitting device, the green light emitting device and the blue light emitting device need to be lit up to 255 gray scales. It can make the white picture have the required color coordinates or color temperature. Corresponding to different target luminances, the lighting durations of the light emitting devices of each color are also different. Therefore, it is necessary to set different driving trace lengths for light emitting devices of different colors.
  • the distance between the first sub-external area 12a and the light-transmitting area 11 is small, therefore, the driving circuit corresponding to the light-emitting device with the longest light-up time is arranged in the first sub-external area 12a, Then the length of the required driving traces is relatively small, so that the RC loading of the target light-emitting device can be effectively suppressed.
  • the light-up time of other light-emitting devices other than the target light-emitting device is relatively short, so a longer drive signal wiring can be set to match the total light-up time of the target light-emitting device, thereby ensuring the uniformity of each color in the pixel unit.
  • the light emitting devices light up simultaneously.
  • the color of the target light emitting device in different pixel units may be different, for example, according to the arrangement of each light emitting device in different display panels is different, or according to the size of each light emitting device in different pixel units It may be any one or both of green light-emitting devices, red light-emitting devices, and blue light-emitting devices. Specifically, it can be determined according to the arrangement of pixels. In this embodiment, it is only required that multiple light emitting devices in the same pixel unit have the same total lighting duration, and the relationship between the total lighting durations of different pixel units is not specifically limited.
  • Fig. 6 is one of the structural schematic diagrams of the light transmission area 11, the first external area 121 and the second external area 122 of an embodiment, referring to Fig. 6, in this embodiment, the display panel includes the light transmission area 11, the second external area 122 An external area 121 and a second external area 122, the first external area 121 and the second external area 122 are respectively located on opposite sides of the light-transmitting area.
  • the transparent area 11 includes a first pixel area 11a and a second pixel area 11b.
  • the first external area 121 is close to the first pixel area 11a
  • the second external area 122 is close to the second pixel area 11b.
  • the first pixel area 11a and the second pixel area 11b are respectively provided with a plurality of the pixel units (not shown in the figure), and each of the pixel units includes the light emitting devices of at least two colors.
  • the multiple light emitting devices located in the first pixel area 11a are connected to the multiple drive circuits located in the first external area 121 in one-to-one correspondence, and the multiple light emitting devices located in the second pixel area 11b are connected in one-to-one correspondence.
  • the light emitting devices are connected to the plurality of driving circuits located in the second external area 122 in a one-to-one correspondence.
  • the lengths of driving lines of different light-emitting devices can be further balanced, and the The area of a single external area can be reduced, thereby facilitating the arrangement of other signal traces.
  • the first outer area 121 includes a first sub-outer area 12a close to the light-transmitting area and a second sub-outer area 12b away from the light-transmitting area, so
  • the second outer area 122 includes a third sub-outer area 12c close to the light-transmitting area and a fourth sub-outer area 12d away from the light-transmitting area.
  • the light emitting device with the longest lighting time among the multiple light emitting devices of the same pixel unit is the target light emitting device.
  • the drive circuit correspondingly connected to the target light-emitting device located in the first pixel area 11a is located in the first sub-external area 12a, and in the first pixel area 11a, it is located at the same location as the target light-emitting device.
  • the corresponding drive circuits connected to the remaining light emitting devices in the pixel units are located in the second sub-external region 12b.
  • the driving circuit correspondingly connected to the target light emitting device located in the second pixel area 11b is located in the third sub-external area 12c, and in the second pixel area 11b, it is located at the same location as the target light emitting device.
  • the corresponding drive circuits connected to the remaining light emitting devices in the pixel units are located in the fourth sub-external region 12d.
  • the target light-emitting devices located in different pixel regions can be respectively connected to the corresponding sub-external regions, thereby increasing the driving line length and
  • the correspondence between the various light emitting devices further improves the display chromaticity uniformity of the display panel.
  • Fig. 7 is the second structural schematic diagram of the light transmission area 11, the first external area 121 and the second external area 122 of an embodiment, referring to Fig. 7, in this embodiment, the shape of the light transmission area 11 is Axisymmetric figure, the transparent region 11 is divided into a first pixel region 11a and a second pixel region 11b by a symmetry axis (ie, the dot-dash line in FIG. 7 ).
  • the first pixel area 11a and the first external area 121 are sequentially arranged along the second direction
  • the second pixel area 11b and the second external area 122 are sequentially arranged along the third direction.
  • the second direction and the third direction are opposite to each other and perpendicular to the axis of symmetry.
  • the design of the driving wiring can be greatly simplified Complexity, thereby reducing various signal transmission problems caused by wiring design, thereby improving the reliability of the display panel.
  • the first sub-outside region 12a and the third sub-outside region 12c can be arranged symmetrically with respect to the above-mentioned axis of symmetry, and the second sub-outside region 12b and the fourth sub-outside region 12d can also be arranged symmetrically about the above-mentioned axis of symmetry, to improve display uniformity.
  • each external area can be rectangular, and by using the rectangular external area, a plurality of driving circuits can be arranged in an array in the external area.
  • the design difficulty of the driving circuit and the arrangement of the driving wiring in this embodiment is relatively low, and it is easier to implement.
  • further implementations are provided based on the structure of the embodiment in FIG. 7 .
  • FIG. 8 is a schematic diagram of the arrangement of pixels in the light-transmitting region 11 according to an embodiment.
  • each pixel unit 100 includes two first light-emitting devices 110a and one second light-emitting device 110b respectively. and a third light emitting device 110c.
  • the two first light-emitting devices 110a respectively have centers located at two first vertices of a virtual quadrangle, and the two first vertices are located on a diagonal of the virtual quadrangle.
  • the second light emitting device 110b is separated from the first light emitting device 110a, and the second light emitting device 110b has a center located at a second vertex of the virtual quadrangle.
  • the third light emitting device 110c is separated from the first light emitting device 110a and the first light emitting device 110a respectively, the third light emitting device 110c has a center located at a third vertex of the virtual quadrilateral, and the second vertex and The third vertex is located on another diagonal of the virtual quadrilateral.
  • the lighting times of the light emitting devices in the same pixel unit are not completely the same.
  • the area of the first light emitting device 110a is smaller than the area of the second light emitting device 110b and smaller than the area of the third light emitting device 110c, and the target light emitting device is the first light emitting device 110a.
  • the first light emitting device 110a may be a green light emitting device
  • the second light emitting device 110b is a red light emitting device
  • the third light emitting device 110c is a blue light emitting device.
  • FIG. 9 is a schematic diagram of the lighting sequence of light emitting devices of multiple colors in the embodiment of FIG. 8, the abscissa of the timing diagram is time, the ordinate is the brightness of the light emitting device, and L(R) is the brightness of the red light emitting device , L(G) is the brightness of the green light-emitting device, and L(B) is the brightness of the blue light-emitting device.
  • L(R) is the brightness of the red light emitting device
  • L(G) is the brightness of the green light-emitting device
  • L(B) is the brightness of the blue light-emitting device.
  • the lighting process can be divided into three stages, that is, non-lighting, lighting up to stable brightness, where a is the duration of the light-emitting device from the lighting-up stage to the stable brightness stage, and b is the light-emitting device never lighting up stage
  • the lighting time of the whole process until the brightness is stable. Since the white screen is composed of red, green and blue light emitting together, and based on the pixel arrangement in the embodiment of FIG. 8 , to achieve the required color temperature of white light usually requires the brightness of the green light emitting device > the brightness of the red light emitting device > the brightness of the blue light emitting device.
  • the light-up time of the green light-emitting device is much longer than that of the red light-emitting device and the blue light-emitting device.
  • the brightness of the green light-emitting device cannot reach the target brightness in time, which causes the problem of dark purple stripes on the display panel.
  • the RC loading of the green light-emitting device can be effectively reduced, thereby suppressing the RC loading of the display panel.
  • the problem of purple dark stripes can be improved to improve the color rendering quality of the display panel 10 .
  • Fig. 10 is one of the schematic diagrams of the driving wiring mode of an embodiment.
  • the eight light-emitting devices in the figure are taken as an example for illustration.
  • the 8 light emitting devices include 2 second light emitting devices 110b (red), 4 first light emitting devices 110a (green) and 2 third light emitting devices 110c (blue).
  • the plurality of drive circuits located in the same sub-external area are arranged equidistantly at a first pitch in the second direction, and the correspondingly connected light-emitting devices of the plurality of drive circuits located in the same sub-external area are arranged in the second direction.
  • the direction is equidistantly arranged with a second interval, and the second interval is positively correlated with the first interval.
  • the distance between the drive traces can be maximized by means of equidistant arrangement, thereby effectively suppressing the coupling phenomenon between the drive traces, thereby reducing the RC caused by the drive traces loading, to improve the display quality of the display panel 10 .
  • the first sub-external area 12a may include a plurality of dummy pixel areas (Dummy), namely Dummy1 to Dummy4, each of which is provided with a preset number of driving circuits, and each dummy pixel area is driven The number of circuits is the same.
  • the second sub-external area 12b may also include a plurality of dummy pixel areas (Dummy), namely Dummy5 to Dummy8, each dummy pixel area is respectively provided with a preset number of driving circuits, and the driving circuits in each dummy pixel area the same amount.
  • each sub-external area may correspond to the number of light-emitting devices in the external area 12 . That is, each of the aforementioned sub-outside regions includes 4 dummy pixel regions for illustrative purposes only, and is not intended to limit the scope of protection of the present application.
  • the driving trace length of the light emitting device near the center of the light-transmitting region 11 is longer than that of the light-emitting device far away from the center of the light-transmitting region 11. Wire.
  • the center here may be the center of symmetry, the center of mass, the center of the diagonal, etc., that is, taking the first light-emitting device 110a as an example, the first driving circuit 210a corresponding to the first light-emitting device 110a closest to the center of the light-transmitting region 11
  • the first driving circuit 210a corresponding to the first light-emitting device 110a farthest from the center of the light-transmitting area 11 is arranged in the Dummy 4 area.
  • the second driving circuit 210b corresponding to the second light-emitting device 110b closest to the center of the light-transmitting region 11 is arranged in the Dummy8 region
  • the third driving circuit 210c corresponding to the third light-emitting device 110c closest to the center of the light-transmitting region 11 is arranged in Dummy area 7.
  • the total length of all the driving wires required in the above manner is relatively short, and correspondingly, the area occupied by the driving wires in the display panel 10 is also relatively small. Therefore, the arrangement of the driving wires in this embodiment is applicable to a small-sized and light-weight display panel 10 .
  • FIG. 11 is the second schematic diagram of the driving routing method of an embodiment.
  • the setting method of the dummy pixel area is the same as that of the embodiment in FIG. 10 , and will not be repeated here.
  • the difference between the lengths of the driving wires of any two light emitting devices is smaller than a preset threshold.
  • the first driving circuit 210a corresponding to the first light-emitting device 110a closest to the center of the light-transmitting region 11 is arranged in the Dummy1 region, and the first light-emitting device 110a farthest from the center of the light-transmitting region 11 corresponds to The first driving circuit 210a is set in the Dummy4 area.
  • the second drive circuit 210b corresponding to the second light-emitting device 110b farthest from the center of the light-transmitting region 11 is disposed in the Dummy7 region
  • the third drive circuit 210c corresponding to the third light-emitting device 110c farthest from the center of the light-transmitting region 11 is disposed in Dummy District 8.
  • the uniformity of RC loading of each driving wire in this embodiment is better, and correspondingly, the total lighting duration of each light-emitting pixel is more similar, and the problem of color shift is greatly suppressed. Therefore, it is also more conducive to subsequent gamma debugging and Demura debugging.
  • the second driving circuits 210b of the second light emitting device 110b and the third driving circuits 210c of the third light emitting device 110c are alternately arranged at intervals.
  • the second direction in this embodiment may be parallel to the width direction of the display panel, and the second driving circuits 210b and the third driving circuits 210c are alternately arranged at intervals in the second direction.
  • the difference in RC loading between the second light emitting device 110b and the third light emitting device 110c can be reduced, thereby improving the matching degree between the second light emitting device 110b and the third light emitting device 110c, and further improving the display performance of the display panel 10. color quality.
  • the number of light-emitting devices in the light-transmitting region 11 is different, the number of required driving wires is also different. Specifically, when the aperture of the light-transmitting region 11 is small, a single-layer driving wiring is sufficient. When the aperture of the light-transmitting region 11 is relatively large, 2 or 3 layers of driving wiring, or even 4 layers of driving wiring may be required to avoid excessive area occupied by the driving wiring in a single layer.
  • FIG. 12 is a circuit diagram of a driving circuit 210 in an embodiment.
  • the driving circuit 210 includes a driving transistor T1, an anode reset unit 211, a gate reset unit 212, a data writing unit 213, a threshold compensation unit 214 and light emission control unit 215.
  • the lines in bold in FIG. 12 are the driving lines L mentioned above.
  • the driving transistor T1 is used to generate a driving current.
  • the gate of the driving transistor T1 is connected to the gate reset unit 212 , the first pole of the driving transistor T1 is used to receive the data signal Data, and the second pole of the driving transistor T1 can output the driving current correspondingly.
  • the current value of the driving current is determined by the data signal Data, and directly affects the light emitting brightness of the light emitting device 110 .
  • the control terminal of the anode reset unit 211 is used to receive the second scan signal Scan(n), the input terminal of the anode reset unit 211 is used to receive the reset voltage signal Vinit, and the output terminal of the anode reset unit 211 is connected to the anode of the light emitting device 110 .
  • the driving circuit 210 is the first driving circuit 210a
  • the output terminal of the anode reset unit 211 is correspondingly connected to the anode of the first light emitting device 110a.
  • the driving circuit 210 is the second driving circuit 210b
  • the output end of the anode reset unit 211 is correspondingly connected to the anode of the second light emitting device 110b.
  • the anode reset unit 211 is used to receive the reset voltage Vinit through the input terminal after the gate of the driving transistor T1 is reset, and pull down the anode of the light emitting device 110 connected thereto to the reset voltage Vinit, so as to reset the anode of the light emitting device 110 .
  • the reset voltage Vinit can be understood as the initial charging voltage of the anode of the light emitting device 110 .
  • the control terminal of the gate reset unit 212 is connected to the gate control terminal for receiving the first scan signal Scan(n-1); the input terminal of the gate reset unit 212 is connected to the second reset terminal for receiving the reset voltage Vinit ; The output end of the gate reset unit 212 is connected to the gate of the driving transistor T1. Specifically, the gate reset unit 212 can pull down the gate voltage of the driving transistor T1 to the reset voltage Vinit according to the first scanning signal Scan(n-1) received by the control terminal, so as to reset the gate of the driving transistor T1 .
  • the data writing unit 213 includes a data writing transistor T2, the gate of the data writing transistor T2 is connected to the second scanning signal line Scan(n), the first pole of the data writing transistor T2 is connected to the data signal line, and the data writing The second pole of the transistor T2 is connected to the first pole of the driving transistor T1, and the data writing transistor T2 is used to control the signal between the second scanning signal line and the first pole of the driving transistor T1 according to the second scanning signal Scan(n). On and off of the transmission path. Specifically, taking the data writing transistor T2 as a P-type transistor as an example, when the second scanning signal Scan(n) is at a low level, the data writing transistor T2 is turned on, and transmits the data signal Data to the first transistor of the driving transistor T1.
  • the data writing transistor T2 is turned off. It can be understood that the data writing unit 213 is not limited to the data writing transistor T2 of this embodiment, and may also be other circuit structures capable of realizing the signal transmission function according to the enable control signal.
  • the threshold compensation unit 214 is connected to the gate and the second electrode of the driving transistor T1 respectively, and is used for controlling the on-off of the signal transmission path between the gate and the second electrode of the driving transistor T1 according to the second scan signal Scan(n). Specifically, by setting the threshold compensation unit 214 , the threshold voltage of the driving transistor T1 can be compensated, so as to prevent the threshold voltage of the driving transistor T1 from affecting the brightness of the light emitting device 110 .
  • the threshold compensation unit 214 includes a threshold compensation transistor T3 and a storage capacitor C1.
  • the storage capacitor C1 is connected to the second power supply voltage terminal VDD and the gate of the driving transistor T1 respectively.
  • the gate of the threshold compensation transistor T3 is connected to the first scanning signal line, the first electrode of the threshold compensation transistor T3 is connected to the second electrode of the driving transistor T1, and the second electrode of the threshold compensation transistor T3 is connected to the gate of the driving transistor T1.
  • the threshold compensation transistor T3 is used for controlling the on-off of the signal transmission path between the gate and the second electrode of the driving transistor T1 according to the second scan signal Scan(n).
  • threshold compensation transistor T3 as a P-type transistor as an example, when the second scan signal Scan(n) is at a low level, threshold compensation is performed and the storage capacitor C1 is charged, so that the compensation result is stored in the storage capacitor C1 .
  • the threshold compensation transistor T3 may be a double-gate transistor.
  • the threshold compensation transistor T3 with a double-gate transistor structure can effectively improve the reliability of the threshold compensation, thereby improving the display quality of the display device. It can be understood that other transistors in the driving circuit 210 may also be double-gate transistors to further improve display quality.
  • the light emission control unit 215 includes a first control transistor T5 and a second control transistor T6.
  • the gate of the first control transistor T5 is used to receive the light-emitting control signal
  • the first pole of the first control transistor T5 is connected to the second power supply voltage terminal
  • the second pole of the first control transistor T5 is connected to the first terminal of the driving transistor T1.
  • the first control transistor T5 is used to control the on-off of the signal transmission path between the second power supply voltage terminal and the first pole of the driving transistor T1 according to the light emission control signal EM.
  • the gate of the second control transistor T6 is used to receive the light emission control signal EM, the first pole of the second control transistor T6 is connected to the second pole of the driving transistor T1, and the second pole of the second control transistor T6 is connected to the anode of the light emitting device 110
  • the second control transistor T6 is used to control the on-off of the signal transmission path between the second pole of the driving transistor T1 and the anode of the light-emitting device 110 according to the light-emitting control signal EM.
  • the first control transistor T5 and the second control transistor T6 are P-type transistors as an example for illustration, when the light emission control signal EM is at a low level, the first control transistor T5 and the second control transistor T6 are turned on, Pull up the voltage of the first pole of the driving transistor T1 to the second power supply voltage VDD, the gate-source voltage difference of the first driving transistor T1 changes to generate a driving current and output the driving current to the light emitting device 110, thereby controlling the light emitting device 110 to emit light .
  • various transistors in this embodiment are not limited to the P-type transistors in the foregoing embodiments, and may also be N-type transistors and the like. For different types of transistors, their corresponding driving methods can also be adaptively adjusted.
  • the driving circuit 210 of this embodiment is not limited to the 7T1C driving circuit 210 in the foregoing embodiments, that is, the driving circuit 210 may also have other numbers of transistors, so as to realize a lightweight display device with a small number of transistors , or realize a more flexible display function with a larger number of transistors, for example, it can also be other types of driving circuits such as 3T1C, 6T1C, 6T2C, etc.
  • the embodiment of the present application also provides a display device as shown in FIG. 1 , including a photosensitive device 20 and the above-mentioned display panel 10 .
  • the photosensitive device 20 is arranged corresponding to the light-transmitting region 11 of the display panel 10 .
  • the display device of this embodiment is less prone to display color shift and has higher color rendering quality.

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Abstract

一种显示面板(10)，包括：多个像素单元(100)，各像素单元(100)分别包括多个发光器件(110)；多条驱动走线；多个驱动电路(210)，多个驱动电路(210)通过多条驱动走线分别与多个发光器件(110)一一对应连接，各驱动电路(210)分别用于输出驱动信号至相连接的发光器件(110)的阳极；同一像素单元(100)中的各发光器件(110)的驱动走线长度与发光器件(110)的起亮时长负相关，驱动走线为连接在驱动电路(210)的输出端与发光器件(110)的阳极之间的走线。

Description

显示面板和显示设备
相关申请的交叉引用
本申请要求于2021年6月7日提交中国专利局、申请号为2021106337837、发明名称为“显示面板和显示设备”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及显示技术领域，特别是涉及一种显示面板和显示设备。
背景技术
这里的陈述仅提供与本申请有关的背景信息，而不必然地构成示例性技术。
随着科学技术的不断发展，电子设备层出不穷，为人们的日常生活和娱乐带来了极大便利。目前，电子设备不断向着大屏化方向发展，为提高电子设备的屏占比，真正实现全面屏，屏下摄像头技术备受关注。
屏下摄像头可以将电子设备的显示屏分为主屏区和副屏区，副屏区即屏下摄像头放置区域。由于副屏区的发光器件通常设置在摄像头的视觉区域，而将发光器件的驱动电路设置于副屏区外围，并通过金属走线连接发光器件与驱动电路。但是，不同的金属走线上会产生不同程度的RC延迟(RC loading)，从而导致副屏区容易发生显示色偏的问题，大大降低了电子设备的显示效果。
发明内容
根据本申请的各种实施例，提供一种显示面板和显示设备。
一种显示面板，包括：
多个像素单元，各所述像素单元分别包括多个发光器件；
多条驱动走线；
多个驱动电路，多个所述驱动电路通过多条所述驱动走线分别与多个所述发光器件一一对应连接，各所述驱动电路分别用于输出驱动信号至相连接的所述发光器件的阳极；
其中，同一所述像素单元中的各所述发光器件的驱动走线长度与发光器件的起亮时长负相关，所述驱动走线为连接在所述驱动电路的输出端与所述发光器件的阳极之间的走线。
一种显示设备，包括：感光器件和如上述的显示面板；其中，所述感光器件与所述显示面板的透光区对应设置。
本申请的一个或多个实施例的细节在下面的附图和描述中提出。本申请的其他特征、目的和优点将从说明书、附图以及权利要求书变得明显。
附图说明
为了更清楚地说明本申请实施例或示例性技术中的技术方案，下面将对实施例或示例性技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他实施例的附图。
图1为一实施例的显示设备的局部结构示意图；
图2为一实施例的显示面板的结构示意图；
图3为一实施例的发光器件和驱动电路的局部放大图；
图4为一实施例的驱动电路的剖视示意图；
图5为一实施例的透光区、第一子外置区和第二子外置区的结构示意图；
图6为一实施例的透光区、第一外置区和第二外置区的结构示意图之一；
图7为一实施例的透光区、第一外置区和第二外置区的结构示意图之二；
图8为一实施例的透光区的像素排列方式的示意图；
图9为图8实施例的多个颜色的发光器件的起亮时序示意图；
图10为一实施例的驱动走线方式的示意图之一；
图11为一实施例的驱动走线方式的示意图之二；
图12为一实施例的驱动电路的电路图。
元件标号说明：
显示面板：10；透光区：11；第一像素区：11a；第二像素区：11b；外置区：12；第一外置区：121；第二外置区：122；第一子外置区：12a；第二子外置区：12b；第三子外置区：12c；第四子外置区：12d；像素单元：100；发光器件：110；第一发光器件：110a；第二发光器件：110b；第三发光器件：110c；驱动电路：210；第一驱动电路：210a；第二驱动电路：210b；第三驱动电路：210c；栅极：2101；源极：2102；漏极：2103；源极接触结构：2104；漏极接触结构：2105；阳极复位单元：211；栅极复位单元：212；数据写入单元：213；阈值补偿单元：214；发光控制单元：215；衬底：311；缓冲层：312；栅绝缘层：313；层间绝缘层：314；平坦化层：315；像素定义层：316；感光器件：20。
具体实施方式
为了便于理解本申请实施例，下面将参照相关附图对本申请实施例进行更全面的描述。附图中给出了本申请实施例的首选实施例。但是，本申请实施例可以以许多不同的形式来实现，并不限于本文所描述的实施例。相反地，提供这些实施例的目的是使对本申请实施例的公开内容更加透彻全面。
除非另有定义，本文所使用的所有的技术和科学术语与属于本申请实施例的技术领域的技术人员通常理解的含义相同。本文中在本申请实施例的说明书中所使用的术语只是为了描述具体地实施例的目的，不是旨在于限制本申请实施例。本文所使用的术语“及/或”包括一个或多个相关的所列项目的任意的和所有的组合。
在本申请实施例的描述中，需要理解的是，术语“上”、“下”、“竖直”、“水平”、“内”、“外”等指示的方位或位置关系为基于附图所示的方法或位置关系，仅是为了便于描述本申请实施例和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请实施例的限制。
可以理解，本申请所使用的术语“第一”、“第二”等可在本文中用于描述各种元件，但这些元件不受这些术语限制。这些术语仅用于将第一个元件与另一个元件区分。举例来说，在不脱离本申请的范围的情况下，可以将第一方向称为第二方向，且类似地，可将第二方向称为第一方向。第一方向和第二方向两者都是方向，但其不是同一方向。
此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括至少一个该特征。在本申请的描述中，“多个”的含义是至少两个，例如两个，三个等，除非另有明确具体地限定。在本申请的描述中，“若干”的含义是至少一个，例如一个，两个等，除非另有明确具体地限定。
图1为一实施例的显示设备的局部结构示意图，显示设备可以为智能手机、平板电脑、游戏设备、增强现实(Augmented Reality，AR)设备、笔记本、桌面计算设备、可穿戴设备等。为了方便理解，下面以显示设备为手机进行举例说明。参考图1，在本实施例中，显示设备包括显示面板10和感光器件20。
显示面板10包括邻接的透光区11和外置区12。其中，透光区11的形状可以是圆形、矩形、椭圆形、多边形、不规则异形等，本发明对此不作限定。外置区12的形状也可以是环形、矩形等，本发明对此不作限定。其中，感光器件20至少部分与透光区11对应设置。示例性地，感光器件20可以设置在透光区11的下方，感光器件20用于透过显示面板10的透光区11发射和/或接收光学信号。即，透光区11是位于感光器件20上方的区域。需要说明的是，在本申请实施例中上方是指由显示设备的背壳指向显示屏的方向，下方是指由显示屏指向背壳的方向。
感光器件20通过接收光线实现基于光学参数的测试和控制。其中，感光器件20可以为摄像头，感光器件20还可以为环境光传感器、光学距离传感器(例如，红外传感器、激光传感器、接近传感器、距离传感器，光学距离传感器)、结构光模组、飞行时间测距(Time of flight，TOF)镜头模组、光学指纹传感器等。
为了便于说明，本申请各实施例中以感光器件20为摄像头为例进行说明。可以理解的是，驱动电路通常形成于层叠设置的多个功能层中，而上述多个功能层会降低摄像头的入射光强度，甚至会导致成像的衍射问题，大大影响了摄像头的成像质量。因此，对于屏下摄像头方案而言，通过将与摄像头对应的显示区域的像素的驱动电路外置于该显示区域，可以有效提升成像质量，从而改 善用户体验。
图2为一实施例的显示面板10的结构示意图，参考图2，在本实施例中，显示面板10包括多个像素单元100、多条驱动走线L和多个驱动电路。
具体地，图2实施例示出了显示面板10中的两个像素单元100，各所述像素单元100分别包括多个发光器件(即图中的二极管)。其中，各像素单元100包括的发光器件数量可以为2个、3个、4个等，具体可以根据需要实现的显示效果确定。示例性地，若显示面板10需要实现较丰富的色彩或较大的色域，则可以设置较多数量的发光器件110，例如每个像素单元100分别包括4个不同颜色的发光器件。可以理解的是，上述数量仅用于示例性说明，而不用于限定本实施例的保护范围。为了简化说明，本实施例像素单元100包括两个发光器件为例进行说明，两个发光器件分别命名为第一发光器件110a和第二发光器件110b。
多个驱动电路分别与多个所述发光器件一一对应连接，各所述驱动电路分别用于输出驱动信号至相连接的所述发光器件的阳极。对应于包括两个发光器件的像素单元100，本实施例的显示面板10包括两种驱动电路。即，两种驱动电路分别为第一驱动电路210a和第二驱动电路210b。其中，第一驱动电路210a与第一发光器件110a的阳极连接，第二驱动电路210b与第二发光器件110b的阳极连接，以分别向对应的发光器件输出驱动信号。为例便于说明，在本申请各实施例中，定义连接在所述驱动电路的输出端与所述发光器件的阳极之间的走线为驱动走线。
示例性地，以第一发光器件110a为红色发光器件，第二发光器件110b为绿色发光器件为例，对相关技术中的色偏问题进行说明。若两个发光器件在相同的时刻起亮，则该像素单元100显示的颜色为黄色。若红色发光器件早于绿色发光器件起亮，则在绿色发光器件起亮前，该像素单元100显示的颜色为红色。若绿色发光器件早于红色发光器件起亮，则在红色发光器件起亮前，该像素单元100显示的颜色为绿色。由此可知，若同一像素单元100中的多个发光器件的起亮时刻不同，会影响该像素单元100显示的颜色，从而造成显示面板10的色偏问题。因此，同一像素单元100中的多个发光器件需要在相同的时刻起亮，以共同实现该像素单元100所需要显示的颜色和亮度。需要强调的是，相同的时刻不局限于完全相同的时刻，若同一像素单元100中的任意两个发光器件的起亮时刻之间的差值小于预设阈值，则可以理解为在相同的时刻起亮，该预设阈值例如可以为0.01ms。其中，起亮时刻是指发光器件达到稳定的目标亮度的时刻，且显示驱动芯片根据需要显示的画面分别确定各发光器件的目标亮度。
图3为一实施例的透光区和外置区的局部放大图，参考图3，位于外置区12的第一驱动电路210a可以通过驱动走线L与位于透光区11的第一发光器件110a电连接。相应地，位于外置区12的第二驱动电路210b也可以通过驱动走线L与位于透光区11的第二发光器件110b电连接。参考图3可以发现，各条驱动走线的长度不完全相同。在本实施例中，同一像素单元100中各所 述发光器件的驱动走线长度与发光器件的起亮时长负相关，即发光器件的起亮时长越长，该发光器件连接到对应驱动电路的走线长度越短。其中，驱动走线L可以是透明金属线，例如，氧化铟锡(Indium Tin Oxide，ITO)金属线、氧化铝锌(Alumina zinc Oxide，AZO)金属线等。可以理解的是，本实施例的外置区12的形状和位置仅用于示例性说明，而不用于限定本申请的外置区的保护范围。
图4为一实施例的驱动电路的剖视示意图，图4的剖面方向垂直于显示面板10的显示面。参考图4，在本实施例中基板可包括依次交替设置的聚酰亚胺(PI)衬底311和缓冲层312，在图4所示的实施例中，基板包括依次交替设置的两个聚酰亚胺(PI)衬底311和两个缓冲层312。可以理解的是，基板也可以包括更多数量的聚酰亚胺(PI)衬底311和缓冲层312。基板上还设置有两个栅绝缘层313(GI1层和GI2层)、层间绝缘层314、平坦化层315和像素定义层316，并在栅绝缘层313、层间绝缘层314、平坦化层315中还形成上述第一驱动电路210a和第二驱动电路210b。具体地，第一驱动电路210a包括栅极2101、源极2102、漏极2103、源极接触结构2104和对应的漏极接触结构2105，且第一发光器件110a中的阳极层通过驱动走线L与源极2102电性连通。第二驱动电路210b也可以包括栅极2101、源极2102、漏极2103、源极接触结构2104和漏极接触结构2105，第二发光器件110b中的阳极层也通过驱动走线L与对应的源极2102电性连通。
结合参考图3和图4，由于发光器件110在透光区11的位置不同，且各发光器件对应的驱动电路的位置也不同，从而导致驱动走线的长度不同。进一步地，任一驱动走线都会与其他的走线之间产生耦合，并产生RC延迟(RC Loading)，从而造成驱动信号在驱动走线上的传输速度降低。可以理解的是，对于一些起亮时长较长的发光器件而言，RC loading会进一步延迟其起亮时刻，并造成显示色偏恶化的问题。因此在本实施例中，通过分别调节各发光器件的驱动走线长度，可以相应改变驱动信号到达各个发光器件的传输时长。可以理解的是，从驱动电路输出驱动信号直至对应的发光器件起亮所需的总点亮时长为传输时长与起亮时长之和。因此，基于不同的传输时长可以分别对不同的起亮时长进行补偿，从而使同一像素单元中各发光器件的总点亮时长相同，进而确保该像素单元能够呈现准确的颜色和亮度。即，本实施例提供了一种颜色准确、显示效果较佳的显示面板。
其中，本实施例中的各发光器件可以是但不限于有机发光二极管(Organic light-emitting diode，OLED)、量子点发光二极管(Quantum Dot Light Emitting Diodes，QLED)和微米级发光二极管(Micro LED)等。需要说明的是，本申请各实施例均以发光器件为有机发光二极管为例进行说明。其中，各发光器件可为不同颜色的有机发光二极管，如红色OLED、绿色OLED和蓝色OLED等，每个发光器件的驱动电路可以相同，但不同颜色的发光器件的发光层材料不同，从而实现不同颜色的显示，使得显示设备实现全彩显示。
在其中一个实施例中，各所述像素单元分别包括至少两个颜色的所述发 光器件，所述显示面板10包括沿第一方向排列的透光区11、第一子外置区12a和第二子外置区12b，所述第一方向为由所述透光区11中心指向透光区11外部的方向。需要说明的是，透光区、第一子外置区、第二子外置区均能显示画面。
具体地，图5为一实施例的透光区11、第一子外置区12a和第二子外置区12b的结构示意图，参考图5，在本实施例中，透光区11的形状为圆形，透光区11中心即为圆心，由圆心沿任一半径指向透光区11外部的方向都可以理解为第一方向。则第一子外置区12a为一围绕透光区11设置的环形结构，第二子外置区12b为一围绕第一子外置区12a设置的环形结构。在本实施例中，第二子外置区12b的外轮廓较为整齐，因此较容易与显示面板10中的其他结构进行兼容设计，显示面板10中的其他结构例如可以包括主屏区的显示像素。其中，显示面板10中除透光区11、第一子外置区12a和第二子外置区12b以外，还包括主屏区。该主屏区也是能够用于显示画面的区域。
进一步地，所述透光区11设置有多个所述像素单元(图未示)。其中，同一像素单元的多个颜色中起亮时长最长的所述发光器件为目标发光器件，所述目标发光器件对应的驱动电路210位于所述第一子外置区12a，同一所述像素单元中的其余的所述发光器件对应的驱动电路分别位于所述第二子外置区12b。其中，发光器件的起亮时长由器件颜色、器件结构、目标亮度等特性决定。
示例性地，以一个像素单元包括一个红色发光器件、一个绿色发光器件和一个蓝色发光器件为例。若需要显示255灰阶的白色画面，则红色发光器件、绿色发光器件和蓝色发光器件均需要点亮至255灰阶，但是，各个发光器件的255灰阶对应的目标亮度不完全相同，才能够使白色画面具有需要的色坐标或色温。对应于不同的目标亮度，各个颜色的发光器件的起亮时长也不相同。因此，需要为不同颜色的发光器件设置不同的驱动走线长度。在本实施例中，第一子外置区12a与透光区11的距离较小，因此，将起亮时长最长的所述发光器件对应的驱动电路设置在第一子外置区12a，则所需要的驱动走线长度也相应较小，从而可以有效抑制目标发光器件的RC loading。同时，目标发光器件以外的其他发光器件的起亮时长较短，因此可以设置较长的驱动信号走线，从而与目标发光器件的总点亮时长相匹配，进而确保统一像素单元中各个颜色的发光器件同时点亮。
可以理解的是，不同像素单元中目标发光器件的颜色可以不同，例如，根据不同显示面板中各发光器件的排列方式不同，或根据不同像素单元中，各发光器件的大小不同，该目标发光器件可能是绿色发光器件、红色发光器件、蓝色发光器件中的任意一种或两种。具体可以根据像素排列方式确定。本实施例只需同一像素单元中多个发光器件具有相同的总点亮时长，而不具体限定不同像素单元的总点亮时长之间的关系。
图6为一实施例的透光区11、第一外置区121和第二外置区122的结构示意图之一，参考图6，在本实施例中，显示面板包括透光区11、第一外置区 121和第二外置区122，第一外置区121和第二外置区122分别位于透光区的相对两侧。所述透光区11包括第一像素区11a和第二像素区11b。所述第一外置区121靠近所述第一像素区11a，所述第二外置区122靠近所述第二像素区11b。所述第一像素区11a和所述第二像素区11b分别设置有多个所述像素单元(图未示)，各所述像素单元分别包括至少两个颜色的所述发光器件。位于所述第一像素区11a的多个所述发光器件与位于所述第一外置区121的多个所述驱动电路一一对应连接，位于所述第二像素区11b的多个所述发光器件与位于所述第二外置区122的多个所述驱动电路一一对应连接。在本实施例中，通过将透光区11中的发光器件分别连接至第一外置区121和第二外置区122中的一个，既可以进一步均衡不同发光器件的驱动走线长度，还可以减小单一外置区的面积，从而便于其他信号走线进行排布。
进一步地，继续参考图6，所述第一外置区121包括一个靠近所述透光区的第一子外置区12a和一个远离所述透光区的第二子外置区12b，所述第二外置区122包括一个靠近所述透光区的第三子外置区12c和一个远离所述透光区的第四子外置区12d。同一所述像素单元的多个发光器件中起亮时长最长的所述发光器件为目标发光器件。与位于所述第一像素区11a的所述目标发光器件对应连接的所述驱动电路位于所述第一子外置区12a，所述第一像素区11a中，与所述目标发光器件位于同一所述像素单元中的其余的所述发光器件对应连接的驱动电路位于所述第二子外置区12b。与位于所述第二像素区11b的所述目标发光器件对应连接的所述驱动电路位于所述第三子外置区12c，所述第二像素区11b中，与所述目标发光器件位于同一所述像素单元中的其余的所述发光器件对应连接的驱动电路位于所述第四子外置区12d。在本实施例中，通过设置与透光区中心距离不同的多个子外置区，可以将位于不同像素区中的目标发光器件分别连接至对应的子外置区，从而提升驱动走线长度与各发光器件之间的对应性，进而提升显示面板的显示色度均匀性。
图7为一实施例的透光区11、第一外置区121和第二外置区122的结构示意图之二，参考图7，在本实施例中，所述透光区11的形状为轴对称图形，所述透光区11由对称轴(即图7中点划线)划分为第一像素区11a和第二像素区11b。所述第一像素区11a和第一外置区121沿第二方向依次设置，所述第二像素区11b和第二外置区122沿第三方向依次设置。其中，所述第二方向和所述第三方向相背设置，且分别垂直于所述对称轴。在本实施例中，通过设置对称结构的两个像素区，以及对称结构的两个外置区，并使两个对称结构的对称轴相重合，可以极大程度上地简化驱动走线的设计复杂性，从而降低走线设计导致的各种信号传输问题，进而提高显示面板的可靠性。进一步地，第一子外置区12a和第三子外置区12c可以关于上述对称轴对称设置，第二子外置区12b和第四子外置区12d也可以关于上述对称轴对称设置，以提升显示均匀性。
进一步地，各外置区的形状可以均为矩形，通过采用矩形的外置区，可以使多个驱动电路在外置区中呈阵列排布。明显地，相较于图5实施例的设置 方式，本实施例中驱动电路以及驱动走线的排列方式的设计难度都相对较低，且更加容易实施。为了便于说明，在后续实施例中，均基于图7实施例的结构提供进一步的实施方式。
图8为一实施例的透光区11的像素排列方式的示意图，参考图8，在本实施例中，各所述像素单元100分别包括两个第一发光器件110a、一个第二发光器件110b和一个第三发光器件110c。两个所述第一发光器件110a分别具有位于虚拟四边形两个第一顶点的中心，两个所述第一顶点位于所述虚拟四边形的一条对角线上。第二发光器件110b与所述第一发光器件110a分离，所述第二发光器件110b具有位于所述虚拟四边形的第二顶点的中心。第三发光器件110c分别与所述第一发光器件110a、所述第一发光器件110a分离，所述第三发光器件110c具有位于所述虚拟四边形的第三顶点的中心，所述第二顶点和所述第三顶点位于所述虚拟四边形的另一条对角线上。其中，同一所述像素单元中的各发光器件的起亮时刻不完全相同。通过采用上述发光器件的排列方式，可以通过将一个发光器件应用于相邻的两个不同像素中，从而实现发光器件的共用，进而可以以较少数量的发光器件，实现较高的显示分辨率。
进一步地，所述第一发光器件110a的面积小于所述第二发光器件110b的面积，且小于所述第三发光器件110c的面积，所述目标发光器件为所述第一发光器件110a。可以理解的是，如前述说明，在需要实现目标的白平衡效果时，需要使不同显色的发光器件的亮度相匹配。因此，面积较小的发光器件需要施加更大的驱动电流，并使其实现相对更大的发光亮度，才能使用户观看时感受到正常且均衡的显示效果。其中，所述第一发光器件110a可以为绿色发光器件，所述第二发光器件110b为红色发光器件，所述第三发光器件110c为蓝色发光器件。
具体地，图9为图8实施例的多个颜色的发光器件的起亮时序示意图，该时序图的横坐标为时间，纵坐标为发光器件的亮度，L(R)为红色发光器件的亮度，L(G)为绿色发光器件的亮度，L(B)为蓝色发光器件的亮度。参考图9，起亮过程可分为三个阶段，即不亮、亮起至亮度稳定，其中，a为发光器件从亮起阶段到亮度稳定阶段过程的时长，b为发光器件从不亮阶段到亮度稳定阶段全过程的起亮时长。由于白色画面由红色、绿色和蓝色共同发光构成，而基于图8实施例的像素排列方式，达到需要的白光色温通常需要绿色发光器件亮度>红色发光器件亮度>蓝色发光器件亮度。因此，绿色发光器件的起亮时长远远大于红色发光器件和蓝色发光器件的起亮时长，相应地，RC loading对绿色发光器件的影响远远超过红色发光器件和蓝色发光器件，从而导致绿色发光器件亮度无法及时达到目标亮度，进而造成显示面板出现紫色暗条纹的问题。在本实施例中，通过将绿色发光器件作为目标发光器件，并将其对应的第一驱动电路设置于第一子外置区，可以有效减小绿色发光器件的RC loading，从而抑制显示面板的紫色暗条纹的问题，提升显示面板10的显色质量。
图10为一实施例的驱动走线方式的示意图之一，参考图10，在本实施例 中，以图中的8个发光器件为例进行说明。其中，8个发光器件包括2个第二发光器件110b(红色)、4个第一发光器件110a(绿色)和2个第三发光器件110c(蓝色)。具体地，位于同一子外置区的多个所述驱动电路在第二方向上以第一间距等距排列，位于同一子外置区的多个所述驱动电路对应连接的发光器件在第二方向上以第二间距等距排列，所述第二间距与所述第一间距正相关。在占用相同走线面积的情况下，通过等距排列的方式，可以将各驱动走线之间的距离最大化，从而有效抑制驱动走线之间的耦合现象，进而减少驱动走线造成的RC loading，提高显示面板10的显示质量。
继续参考图10，第一子外置区12a可以包括多个伪像素区(Dummy)，即Dummy1至Dummy4，各伪像素区中分别设置有预设数量的驱动电路，且各伪像素区中驱动电路的数量相同。相似地，第二子外置区12b也可以包括多个伪像素区(Dummy)，即Dummy5至Dummy8，各伪像素区中分别设置有预设数量的驱动电路，且各伪像素区中驱动电路的数量相同。可以理解的是，每个子外置区中伪像素区的数量可以与外置区12中的发光器件的数量相对应。即，上述每个子外置区分别包括4个伪像素区仅用于示例性说明，而不用于限定本申请的保护范围。
在图10实施例中，在相同颜色的多个所述发光器件中，靠近所述透光区11中心的发光器件的驱动走线长度大于远离所述透光区11中心的发光器件的驱动走线。这里的中心，可以是对称中心、质量中心、对角线中心等等，即，以第一发光器件110a为例，最靠近透光区11中心的第一发光器件110a对应的第一驱动电路210a设置于Dummy4区，最远离透光区11中心的第一发光器件110a对应的第一驱动电路210a设置于Dummy1区。相似地，最靠近透光区11中心的第二发光器件110b对应的第二驱动电路210b设置于Dummy8区，最靠近透光区11中心的第三发光器件110c对应的第三驱动电路210c设置于Dummy7区。上述方式所需要的全部驱动走线的总长度相对较短，相应地，驱动走线在显示面板10中所需要占据的面积也相对较小。因此，本实施例的驱动走线的设置方式可适用于小体积、轻量级的显示面板10。
图11为一实施例的驱动走线方式的示意图之二，参考图11，伪像素区的设置方式与图10实施例相同，此处不再进行赘述。在本实施例中，在相同颜色的多个所述发光器件中，任意两个所述发光器件的驱动走线长度之间的差值小于预设阈值。即，以第一发光器件110a为例，最靠近透光区11中心的第一发光器件110a对应的第一驱动电路210a设置于Dummy1区，最远离透光区11中心的第一发光器件110a对应的第一驱动电路210a设置于Dummy4区。相似地，最远离透光区11中心的第二发光器件110b对应的第二驱动电路210b设置于Dummy7区，最远离透光区11中心的第三发光器件110c对应的第三驱动电路210c设置于Dummy8区。与图10实施例相比，本实施例的各条驱动走线的RC loading的均匀性更好，相应地，各发光像素的总点亮时长更加相近，色偏问题大大受到抑制。因此，也更有利于后续的gamma调试及Demura调试。
继续参考图11，在其中一个实施例中，所述第二发光器件110b的第二驱 动电路210b和所述第三发光器件110c的第三驱动电路210c交替间隔设置。具体地，本实施例的第二方向可以平行于显示面板的宽度方向，且第二驱动电路210b和第三驱动电路210c在第二方向上交替间隔设置。基于上述连接方式，可以减小第二发光器件110b和第三发光器件110c之间RC loading的差异，从而提高第二发光器件110b和第三发光器件110c的匹配度，进而提升显示面板10的显色质量。
在其中一个实施例中，当透光区11中的发光器件的数目不同时，所需驱动走线的数目也不相同。具体地，当透光区11的孔径较小时，单层驱动走线即可满足。当透光区11的孔径较大时，可能需要2层或3层驱动走线，甚至4层驱动走线，以避免驱动走线在单层中占用的面积过大。
图12为一实施例的驱动电路210的电路图，参考图12，在本实施例中，驱动电路210包括驱动晶体管T1、阳极复位单元211、栅极复位单元212、数据写入单元213、阈值补偿单元214和发光控制单元215。其中，图12中加粗的走线即为前述驱动走线L。
具体地，驱动晶体管T1用于生成驱动电流。其中，驱动晶体管T1的栅极与栅极复位单元212连接，驱动晶体管T1的第一极用于接收数据信号Data，驱动晶体管T1的第二极可对应输出驱动电流。其中，驱动电流的电流值由数据信号Data决定，并直接影响发光器件110的发光亮度。
阳极复位单元211的控制端用于接收第二扫描信号Scan(n)，阳极复位单元211的输入端用于接收复位电压信号Vinit，阳极复位单元211的输出端与发光器件110的阳极连接。具体地，若驱动电路210为第一驱动电路210a，其阳极复位单元211的输出端则对应与第一发光器件110a的阳极连接。若驱动电路210为第二驱动电路210b，其阳极复位单元211的输出端则对应与第二发光器件110b的阳极连接。
阳极复位单元211用于在驱动晶体管T1的栅极复位后，经输入端接收复位电压Vinit，并拉低与之连接的发光器件110的阳极至复位电压Vinit，以对发光器件110的阳极进行复位。其中，复位电压Vinit可理解为发光器件110的阳极起始充电电压。通过对发光器件110的阳极进行复位，可以改变发光器件110的使用于驱动发光器件110的驱动电流流向发光器件110的阳极，以驱动发光器件110发光，同时，也不会对驱动电流造成影响，从而确保发光器件110的发光亮度的可靠性。
栅极复位单元212的控制端与栅极控制端连接，用于接收第一扫描信号Scan(n-1)；栅极复位单元212的输入端与第二复位端连接，用于接收复位电压Vinit；栅极复位单元212的输出端与驱动晶体管T1的栅极连接。具体地，栅极复位单元212可根据控制端接收到的第一扫描信号Scan(n-1)拉低驱动晶体管T1的栅极电压至复位电压Vinit，以对驱动晶体管T1的栅极进行复位。
数据写入单元213包括数据写入晶体管T2，数据写入晶体管T2的栅极与第二扫描信号线Scan(n)连接，数据写入晶体管T2的第一极与数据信号线连 接，数据写入晶体管T2的第二极与驱动晶体管T1的第一极连接，数据写入晶体管T2用于根据第二扫描信号Scan(n)控制第二扫描信号线和驱动晶体管T1的第一极之间的信号传输路径的通断。具体地，以数据写入晶体管T2为P型晶体管为例，当第二扫描信号Scan(n)为低电平时，数据写入晶体管T2导通，并将数据信号Data传输至驱动晶体管T1的第一极；当第二扫描信号Scan(n)为低电平时，数据写入晶体管T2断开。可以理解的是，数据写入单元213不局限于本实施例的数据写入晶体管T2，也可以为其他能够根据使能控制信号，并实现信号传输功能的其他电路结构。
阈值补偿单元214分别与驱动晶体管T1的栅极、第二极连接，用于根据第二扫描信号Scan(n)控制驱动晶体管T1的栅极和第二极之间的信号传输路径的通断。具体地，通过设置阈值补偿单元214，可以对驱动晶体管T1的阈值电压进行补偿，从而避免驱动晶体管T1的阈值电压对发光器件110的亮度造成影响。
其中，阈值补偿单元214包括阈值补偿晶体管T3和存储电容C1。存储电容C1分别与第二电源电压端VDD、驱动晶体管T1的栅极连接。阈值补偿晶体管T3的栅极与第一扫描信号线连接，阈值补偿晶体管T3的第一极与驱动晶体管T1的第二极连接，阈值补偿晶体管T3的第二极与驱动晶体管T1的栅极连接。阈值补偿晶体管T3用于根据第二扫描信号Scan(n)控制驱动晶体管T1的栅极和第二极之间的信号传输路径的通断。具体地，以阈值补偿晶体管T3为P型晶体管为例，当第二扫描信号Scan(n)为低电平时，进行阈值补偿并对存储电容C1进行充电，从而将补偿结果存储在存储电容C1中。
可选地，阈值补偿晶体管T3可以为双栅极晶体管。在本实施例中，采用双栅极晶体管结构的阈值补偿晶体管T3，可以有效改善阈值补偿的可靠性，从而改善显示设备的显示质量。可以理解的是，驱动电路210中的其他晶体管也可以为双栅极晶体管，以进一步提升显示质量。
发光控制单元215包括第一控制晶体管T5和第二控制晶体管T6。其中，第一控制晶体管T5的栅极用于接收发光控制信号，第一控制晶体管T5的第一极与第二电源电压端连接，第一控制晶体管T5的第二极与驱动晶体管T1的第一极连接，第一控制晶体管T5用于根据发光控制信号EM控制第二电源电压端和驱动晶体管T1的第一极之间的信号传输路径的通断。第二控制晶体管T6的栅极用于接收发光控制信号EM，第二控制晶体管T6的第一极与驱动晶体管T1的第二极连接，第二控制晶体管T6的第二极发光器件110的阳极连接，第二控制晶体管T6用于根据发光控制信号EM控制驱动晶体管T1的第二极和发光器件110的阳极之间的信号传输路径的通断。示例性地，以第一控制晶体管T5和第二控制晶体管T6均为P型晶体管为例进行说明，当发光控制信号EM为低电平时，第一控制晶体管T5和第二控制晶体管T6导通，将驱动晶体管T1的第一极的电压上拉至第二电源电压VDD，第一驱动晶体管T1的栅源电压差变化从而生成驱动电流并将驱动电流输出至发光器件110，从而控制发光器件110发光。
需要说明的是，本实施例中的各种晶体管不局限于前述实施例中的P型晶体管，还可以为N型晶体管等。晶体管的类型不同，其对应的驱动方式也可做适应性调整。另外，本实施例的驱动电路210不局限于前述实施例中的7T1C驱动电路210，即，驱动电路210中也可以具有其他数量的晶体管，从而以较少数量的晶体管实现轻量级的显示设备，或者以较多数量的晶体管实现更加灵活的显示功能，例如，还是可以为3T1C、6T1C、6T2C等其他类型的驱动电路。
本申请实施例还提供了一种如图1所示的显示设备，包括感光器件20和如上述的显示面板10。其中，所述感光器件20与所述显示面板10的透光区11对应设置。基于前述显示面板10，本实施例的显示设备不易发生显示色偏，显色质量较高。
以上所述实施例的各技术特征可以进行任意的组合，为使描述简洁，未对上述实施例中的各个技术特征所有可能的组合都进行描述，然而，只要这些技术特征的组合不存在矛盾，都应当认为是本说明书记载的范围。
以上所述实施例仅表达了本申请实施例的几种实施方式，其描述较为具体和详细，但并不能因此而理解为对发明专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本申请实施例构思的前提下，还可以做出若干变形和改进，这些都属于本申请实施例的保护范围。因此，本申请实施例专利的保护范围应以所附权利要求为准。

Claims (20)

  1. 一种显示面板，包括：
    多个像素单元，各所述像素单元分别包括多个发光器件；
    多条驱动走线；
    多个驱动电路，多个所述驱动电路通过多条所述驱动走线分别与多个所述发光器件一一对应连接，各所述驱动电路分别用于输出驱动信号至相连接的所述发光器件的阳极；
    其中，同一所述像素单元中的各所述发光器件的驱动走线长度与发光器件的起亮时长负相关，所述驱动走线为连接在所述驱动电路的输出端与所述发光器件的阳极之间的走线。
  2. 根据权利要求1所述的显示面板，所述显示面板包括沿第一方向排列的透光区、第一子外置区和第二子外置区，所述第一方向为由所述透光区中心指向透光区外部的方向，所述透光区设置有多个所述像素单元，各所述像素单元分别包括至少两个颜色的所述发光器件；
    其中，同一所述像素单元的多个发光器件中起亮时长最长的所述发光器件为目标发光器件，所述目标发光器件对应的驱动电路位于所述第一子外置区，为，同一所述像素单元中的其余的所述发光器件对应的驱动电路位于所述第二子外置区。
  3. 根据权利要求2所述的显示面板，所述显示面板包括：
    透光区，所述透光区包括第一像素区和第二像素区，所述显示面板还包括分别位于所述透光区的相对两侧的第一外置区和第二外置区；
    位于所述第一像素区的多个所述发光器件与位于所述第一外置区的多个所述驱动电路一一对应连接，位于所述第二像素区的多个所述发光器件与位于所述第二外置区的多个所述驱动电路一一对应连接；
    所述第一外置区靠近所述第一像素区，所述第二外置区靠近所述第二像素区。
  4. 根据权利要求3所述的显示面板，所述显示面板包括：
    所述第一像素区域和所述第二像素区均设有多个像素单元，各所述像素单元分别包括至少两个颜色的所述发光器件，同一所述像素单元的多个发光器件中起亮时长最长的所述发光器件为目标发光器件；
    所述第一外置区包括一个靠近所述透光区的第一子外置区和一个远离所述透光区的第二子外置区，所述第二外置区包括一个靠近所述透光区的第三子外置区和一个远离所述透光区的第四子外置区；
    与位于所述第一像素区的所述目标发光器件对应连接的所述驱动电路位于所述第一子外置区，所述第一像素区中，与所述目标发光器件位于同一所述像素单元中的其余的所述发光器件对应连接的驱动电路位于所述第二子外置区；
    与位于所述第二像素区的所述目标发光器件对应连接的所述驱动电路位于所述第三子外置区，所述第二像素区中，与所述目标发光器件位于同一所 述像素单元中的其余的所述发光器件对应连接的驱动电路位于所述第四子外置区。
  5. 根据权利要求3所述的显示面板，所述透光区的形状为轴对称图形，所述透光区由对称轴划分为所述第一像素区和所述第二像素区，所述第一像素区和第一外置区沿第二方向依次设置，所述第二像素区和第二外置区沿第三方向依次设置；其中，所述第二方向和所述第三方向相背设置，且分别垂直于所述对称轴。
  6. 根据权利要求4所述的显示面板，所述透光区的形状为轴对称图形，所述第一子外置区和所述第三子外置区关于所述透光区的对称轴对称设置，且所述第二子外置区和所述第四子外置区也关于所述对称轴对称设置。
  7. 根据权利要求6所述的显示面板，各所述外置区的形状均为矩形。
  8. 根据权利要求7所述的显示面板，多个所述驱动电路在所述外置区中呈阵列排布。
  9. 根据权利要求6所述的显示面板，所述透光区的形状为圆形，所述第一子外置区为一围绕所述透光区设置的环形结构，所述第二子外置区为一围绕所述第一子外置区设置的环形结构。
  10. 根据权利要求2至9任一项所述的显示面板，各所述像素单元分别包括：
    两个第一发光器件，两个所述第一发光器件分别具有位于虚拟四边形两个第一顶点的中心，两个所述第一顶点位于所述虚拟四边形的一条对角线上；
    一个第二发光器件，与所述第一发光器件分离，所述第二发光器件具有位于所述虚拟四边形的第二顶点的中心；
    一个第三发光器件，分别与所述第一发光器件、所述第二发光器件分离，所述第三发光器件具有位于所述虚拟四边形的第三顶点的中心，所述第二顶点和所述第三顶点位于所述虚拟四边形的另一条对角线上；
    其中，同一所述像素单元中的各发光器件的起亮时刻不完全相同。
  11. 根据权利要求10所述的显示面板，所述第一发光器件的面积小于所述第二发光器件的面积，且小于所述第三发光器件的面积，所述目标发光器件为所述第一发光器件。
  12. 根据权利要求11所述的显示面板，所述第一发光器件为绿色发光器件。
  13. 根据权利要求11所述的显示面板，所述第二发光器件为红色发光器件，所述第三发光器件为蓝色发光器件，所述红色发光器件的驱动电路和所述蓝色发光器件的驱动电路交替间隔设置。
  14. 根据权利要求2至9任一项所述的显示面板，位于同一子外置区的多个所述驱动电路以第一间距等距排列，位于同一子外置区的多个所述驱动电路对应连接的发光器件以第二间距等距排列，所述第二间距与所述第一间距正相关。
  15. 根据权利要求2至9任一项所述的显示面板，所述第一子外置区包括 多个伪像素区，且所述第二子外置区也包括多个伪像素区，其中，各伪像素区中分别设置有预设数量的驱动电路，且各伪像素区中驱动电路的数量相同。
  16. 根据权利要求2至9任一项所述的显示面板，在相同颜色的多个所述发光器件中，靠近所述透光区的发光器件的驱动走线长度大于远离所述透光区的发光器件的驱动走线。
  17. 根据权利要求2至9任一项所述的显示面板，在相同颜色的多个所述发光器件中，任意两个所述发光器件的驱动走线长度之间的差值小于预设阈值。
  18. 根据权利要求1至9任一项所述的显示面板，驱动走线为氧化铟锡金属线或氧化铝锌金属线。
  19. 一种显示设备，包括：感光器件和如权利要求1至18任一项所述的显示面板；其中，所述感光器件与所述显示面板的透光区对应设置。
  20. 根据权利要求19所述的显示设备，所述感光器件为摄像头。
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