WO2025065261A1 - 显示基板和显示装置 - Google Patents
显示基板和显示装置 Download PDFInfo
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- WO2025065261A1 WO2025065261A1 PCT/CN2023/121688 CN2023121688W WO2025065261A1 WO 2025065261 A1 WO2025065261 A1 WO 2025065261A1 CN 2023121688 W CN2023121688 W CN 2023121688W WO 2025065261 A1 WO2025065261 A1 WO 2025065261A1
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- transistor
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- light
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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
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- 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]
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D86/00—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates
- H10D86/40—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates characterised by multiple TFTs
- H10D86/60—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates characterised by multiple TFTs wherein the TFTs are in active matrices
-
- 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
Definitions
- the present invention relates to but is not limited to the field of display technology, and specifically to a display substrate and a display device.
- OLED Organic Light Emitting Diode
- QLED Quantum-dot Light Emitting Diode
- TFT thin film transistors
- the present disclosure provides a display substrate, including multiple circuit units constituting multiple unit rows and multiple unit columns, at least one circuit unit including a pixel driving circuit and at least one control line, and the control line is configured to provide a light-emitting control signal to the pixel driving circuit; in at least one circuit unit, the pixel driving circuit at least includes a driving transistor, a first light-emitting control transistor, and a second light-emitting control transistor, the first electrode of the first light-emitting control transistor is connected to a first power line, the second electrode of the first light-emitting control transistor is connected to the first electrode of the driving transistor, and the first electrode of the second light-emitting control transistor is connected to the second electrode of the driving transistor; the first light-emitting control transistor and the second light-emitting control transistor are connected to different control lines, and the first light-emitting control transistor and the second light-emitting control transistor are respectively arranged on both sides of the driving transistor unit column direction.
- the pixel driving circuit at least includes a driving
- At least one control line includes a first signal line and a second signal line
- the first light emission control transistor is connected to the first signal line
- the second light emission control transistor is connected to the second signal line
- the first signal line and the second signal line are respectively arranged on both sides of the column direction of the driving transistor unit.
- the display substrate in a direction perpendicular to the display substrate, includes a plurality of conductive layers, and the first signal line and the second signal line are disposed in different conductive layers.
- the second light emission control transistor includes at least a second gate, the second gate and the first signal line are disposed in the same conductive layer, and the second gate and the second signal line are disposed in different conductive layers.
- the pixel driving circuit also includes a compensation transistor, a gate electrode of the compensation transistor is connected to the first scanning signal line, a first electrode of the compensation transistor is connected to the gate electrode of the driving transistor through a first connecting electrode, and a second electrode of the compensation transistor is respectively connected to the second electrode of the driving transistor and the first electrode of the second light-emitting control transistor; an orthographic projection of the first connecting electrode on a display substrate plane at least partially overlaps with an orthographic projection of the first signal line on a display substrate plane, and an orthographic projection of the first connecting electrode on a display substrate plane at least partially overlaps with an orthographic projection of the first scanning signal line on a display substrate plane.
- the compensation transistor includes at least a compensation active layer
- the second light-emitting control transistor includes at least a second light-emitting control active layer
- the second region of the compensation active layer is connected to the first region of the second light-emitting control active layer through a fifth connecting electrode
- the display substrate in a direction perpendicular to the display substrate, includes at least at least one semiconductor layer and at least one conductive layer, the compensation active layer and the second light-emitting control active layer are arranged in the semiconductor layer, and the fifth connecting electrode is arranged in the conductive layer.
- the pixel driving circuit further includes a data writing transistor.
- the first electrode of the transistor is connected to the data signal line
- the second electrode of the data writing transistor is connected to the first electrode of the driving transistor
- the data writing transistor and the compensation transistor are respectively arranged on both sides of the driving transistor unit column direction.
- At least one control line includes a light emission signal line connected to the second light emission control transistor in a present cell row, and the light emission signal line is connected to the first light emission control transistor in a next cell row.
- the first light emission control transistor includes at least a first gate
- the second light emission control transistor includes at least a second gate
- the light emission signal line is connected to the second gate in the current unit row
- the light emission signal line is connected to the first light emission control transistor in the next unit row through a light emission signal connection line.
- the display substrate in a direction perpendicular to the display substrate, includes multiple conductive layers, the first gate and the second gate are arranged in the same conductive layer, the first gate and the light-emitting signal line are arranged in different conductive layers, the first gate and the light-emitting signal connecting line are arranged in different conductive layers, and the light-emitting signal connecting line and the light-emitting signal line are arranged in different conductive layers.
- the multiple conductive layers include at least a first conductive layer, a second conductive layer, a third conductive layer and a fourth conductive layer which are sequentially arranged on the substrate in a direction away from the substrate, the first gate and the second gate are arranged in the first conductive layer, the light-emitting signal line is arranged in the third conductive layer, the light-emitting signal line is connected to the second gate through a via, the light-emitting signal connecting line is arranged in the fourth conductive layer, the first end of the light-emitting signal connecting line is connected to the light-emitting signal line in the current unit row through a via, and the second end of the light-emitting signal connecting line is connected to the first gate in the next unit row through a via.
- the multiple conductive layers also include a fifth conductive layer arranged on a side of the fourth conductive layer away from the substrate, the first power line is arranged in the fifth conductive layer, and the orthographic projection of the first power line on the display substrate plane at least partially overlaps with the orthographic projection of the light-emitting signal connection line on the display substrate plane.
- At least one circuit unit also includes a first initial signal line extending along a pixel row direction and a first connecting line extending along a pixel column direction, the first initial signal line is configured to provide a first initial signal to the pixel driving circuit, and the first initial signal line and the first connecting line are connected to form a mesh connection structure for transmitting the first initial signal.
- an orthographic projection of the first connection line on the plane of the display substrate does not overlap with an orthographic projection of the gate electrode of the driving transistor on the plane of the display substrate.
- the pixel driving circuit further includes a compensation transistor, an active layer of the compensation transistor and an active layer of the driving transistor are interconnected via an active connecting line, and an orthographic projection of the first connecting line on a display substrate plane at least partially does not overlap with an orthographic projection of the active connecting line on a display substrate plane.
- At least one circuit unit also includes a second initial signal line extending along a pixel row direction and a second connecting line extending along a pixel column direction, the second initial signal line is configured to provide a second initial signal to the pixel driving circuit, and the second initial signal line and the second connecting line are connected to form a mesh connection structure for transmitting the second initial signal.
- an orthographic projection of the second connection line on the plane of the display substrate does not overlap with an orthographic projection of the gate electrode of the driving transistor on the plane of the display substrate.
- the pixel driving circuit further includes a compensation transistor, an active layer of the compensation transistor and an active layer of the driving transistor are interconnected via an active connecting line, and an orthographic projection of the second connecting line on a display substrate plane at least partially does not overlap with an orthographic projection of the active connecting line on a display substrate plane.
- At least one circuit unit further includes a third connection line extending along the pixel row direction and a second power line extending along the pixel column direction, and the second power line and the third connection line are connected to form a mesh connection structure for transmitting a second power signal.
- the orthographic projection of the second power line on the display substrate plane is parallel to the driving crystal
- the orthographic projections of the gate electrodes of the tubes on the plane of the display substrate do not overlap.
- the pixel driving circuit further includes a compensation transistor, an active layer of the compensation transistor and an active layer of the driving transistor are interconnected via an active connecting line, and an orthographic projection of the second power line on a display substrate plane at least partially does not overlap with an orthographic projection of the active connecting line on a display substrate plane.
- the pixel driving circuit also includes a storage capacitor and a first capacitor;
- the storage capacitor includes a first plate and a second plate, the orthographic projection of the first plate on the display substrate plane at least partially overlaps with the orthographic projection of the second plate on the display substrate plane, the first plate serves as the gate electrode of the driving transistor, and the second plate is connected to the first power line;
- the first capacitor includes a third plate and a fourth plate, the orthographic projection of the third plate on the display substrate plane at least partially overlaps with the orthographic projection of the fourth plate on the display substrate plane, the third plate is respectively connected to the first electrode of the driving transistor and the second electrode of the first light-emitting control transistor, and the fourth plate is connected to the first power line.
- the display substrate in a direction perpendicular to the display substrate, includes at least a semiconductor layer, a first conductive layer, and a second conductive layer, which are sequentially arranged on a substrate in a direction away from the substrate, the third electrode plate is arranged in the semiconductor layer, the first electrode plate is arranged in the first conductive layer, and the second electrode plate and the fourth electrode plate are arranged in the second conductive layer.
- the present disclosure further provides a display device, comprising the aforementioned display substrate.
- FIG1 is a schematic structural diagram of a display device
- FIG2 is a schematic diagram of a planar structure of a display substrate
- FIG3 is a schematic diagram of a cross-sectional structure of a display substrate
- FIG4 is a schematic diagram of an equivalent circuit of a pixel driving circuit according to an exemplary embodiment of the present disclosure
- FIG5 is a schematic structural diagram of a display substrate according to an exemplary embodiment of the present disclosure.
- FIG6 is a schematic diagram of a display substrate after a semiconductor layer pattern is formed according to the present disclosure.
- FIG. 7A and 7B are schematic diagrams of a display substrate after a first conductive layer pattern is formed according to the present disclosure
- FIGS. 8A and 8B are schematic diagrams of a display substrate after a second conductive layer pattern is formed according to the present disclosure
- FIG9 is a schematic diagram of a display substrate after a fourth insulating layer pattern is formed according to the present disclosure.
- FIGS. 10A and 10B are schematic diagrams of a display substrate after a third conductive layer pattern is formed according to the present disclosure
- FIG11 is a schematic diagram of a display substrate after forming a first flat layer pattern according to the present disclosure
- FIGS. 12A and 12B are schematic diagrams of a display substrate after a fourth conductive layer pattern is formed according to the present disclosure
- 12C to 12E are schematic diagrams of a meshed connection structure of a first initial signal and a second initial signal according to the present invention.
- FIG13 is a schematic diagram of a display substrate after a second flat layer pattern is formed according to the present disclosure.
- FIGS. 14A and 14B are schematic diagrams of a display substrate after an anode conductive layer pattern is formed according to the present disclosure
- FIG15 is a schematic diagram of a display substrate after forming a pixel definition layer pattern according to the present disclosure
- FIG16 is a schematic diagram of an equivalent circuit of another pixel driving circuit according to an exemplary embodiment of the present disclosure.
- 19A and 19B are schematic diagrams of another display substrate after forming a first conductive layer pattern according to the present disclosure
- FIG21 is a schematic diagram of another display substrate after a fourth insulating layer pattern is formed in the present disclosure.
- the terms “installed”, “connected”, and “connected” should be understood in a broad sense.
- it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate, or the internal communication of two elements.
- installed can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate, or the internal communication of two elements.
- the pixel array may include a plurality of sub-pixels Pxij, i and j may be natural numbers, at least one sub-pixel Pxij may include a circuit unit and a light emitting unit, the circuit unit may include at least a pixel driving circuit, the pixel driving circuit is respectively connected to the scan signal line, the light emitting signal line and the data signal line, the light emitting unit may include a light emitting device, and the light emitting device is connected to the pixel driving circuit of the circuit unit.
- the timing controller may provide a grayscale value and a control signal suitable for the specifications of the data driver to the data driver, may provide a clock signal suitable for the specifications of the scan driver, a scan start signal, etc.
- the scan driver may provide a clock signal suitable for the specifications of the light emitting driver, an emission stop signal, etc. to the light emitting driver.
- the data driver can use the grayscale value and control
- the control signal is used to generate the data voltage to be provided to the data signal lines DATA1, D2, D3, ... and Dn.
- the data driver can sample the grayscale value using the clock signal, and apply the data voltage corresponding to the grayscale value to the data signal lines DATA1 to Dn in units of pixel rows, and n can be a natural number.
- the scan driver can generate the scan signal to be provided to the scan signal lines S1, S2, S3, ... and Sm by receiving the clock signal, the scan start signal, etc. from the timing controller.
- the scan driver can sequentially provide the scan signal with the conduction level pulse to the scan signal lines S1 to Sm.
- the scan driver can be constructed in the form of a shift register, and the scan start signal provided in the form of the conduction level pulse can be sequentially transmitted to the next level circuit under the control of the clock signal to generate the scan signal, and m can be a natural number.
- the light-emitting driver can generate the emission signal to be provided to the light-emitting signal lines EM1, E2, E3, ... and Eo by receiving the clock signal, the emission stop signal, etc. from the timing controller.
- the light emitting driver may sequentially provide an emission signal having a cut-off level pulse to the light emitting signal lines EM1 to Eo.
- the light emitting driver may be configured in the form of a shift register, and may generate an emission signal in a manner that sequentially transmits an emission stop signal provided in the form of a cut-off level pulse to a next stage circuit under the control of a clock signal, and o may be a natural number.
- a pixel array may be provided on a display substrate.
- FIG2 is a schematic diagram of a planar structure of a display substrate.
- the display substrate may include a plurality of pixel units P arranged in a matrix manner, and at least one pixel unit P may include a first sub-pixel P1, a second sub-pixel P2, a third sub-pixel P3, and a fourth sub-pixel P4.
- Each sub-pixel may include a circuit unit and a light-emitting unit, and the circuit unit may include at least a pixel driving circuit, and the pixel driving circuit is respectively connected to a scanning signal line, a data signal line, and a light-emitting signal line, and the pixel driving circuit is configured to receive a data voltage transmitted by the data signal line under the control of the scanning signal line and the light-emitting signal line, and output a corresponding current to the light-emitting unit.
- the light-emitting unit may include a light-emitting device, and the light-emitting device is connected to the pixel driving circuit of the sub-pixel in which it is located, and the light-emitting device is configured to emit light of corresponding brightness in response to the current output by the pixel driving circuit of the sub-pixel in which it is located.
- the first sub-pixel P1 may be a red sub-pixel (R) emitting red light
- the second sub-pixel P2 and the fourth sub-pixel P4 may be green sub-pixels (G) emitting green light
- the third sub-pixel P3 may be a blue sub-pixel (B) emitting blue light.
- the shape of the sub-pixels may be rectangular, rhombus, pentagonal or hexagonal
- the four sub-pixels may be arranged in a diamond shape to form an RGBG pixel arrangement.
- the four sub-pixels may be arranged in a horizontal parallel arrangement, a vertical parallel arrangement or a square arrangement, etc., which is not limited in the present disclosure.
- a pixel unit may include three sub-pixels, and the three sub-pixels may be arranged in a horizontal parallel arrangement, a vertical parallel arrangement, or a triangular arrangement, which is not limited in the present disclosure.
- FIG3 is a schematic diagram of a cross-sectional structure of a display substrate, illustrating the structure of four sub-pixels in the display area.
- the display substrate may include a driving circuit layer 102 disposed on a substrate 101, a light emitting structure layer 103 disposed on a side of the driving circuit layer 102 away from the substrate 101, and an encapsulation structure layer 104 disposed on a side of the light emitting structure layer 103 away from the substrate 101.
- the display substrate may include other film layers, such as a touch structure layer, etc., which is not limited in the present disclosure.
- the substrate 101 may be a flexible substrate, or may be a rigid substrate.
- the driving circuit layer 102 may include a plurality of circuit units, each of which may include at least a pixel driving circuit composed of a plurality of transistors and a storage capacitor.
- the light-emitting structure layer 103 may include a plurality of light-emitting units, each of which may include a light-emitting device, and the light-emitting device may include at least an anode, an organic light-emitting layer, and a cathode, the anode is connected to the pixel driving circuit, the organic light-emitting layer is connected to the anode, the cathode is connected to the organic light-emitting layer, and the organic light-emitting layer emits light of corresponding colors under the drive of the anode and the cathode.
- the encapsulation structure layer 104 may include a first encapsulation layer, a second encapsulation layer, and a third encapsulation layer stacked, the first encapsulation layer and the third encapsulation layer may be made of inorganic materials, the second encapsulation layer may be made of organic materials, and the second encapsulation layer is arranged between the first encapsulation layer and the third encapsulation layer to form an inorganic material/organic material/inorganic material stacked structure, which can ensure that external water vapor cannot enter the light-emitting structure layer 103.
- the display substrate may include a driving structure layer disposed on the substrate and a light-emitting structure layer disposed on a side of the driving structure layer away from the substrate.
- the driving structure layer may include a plurality of circuit units constituting a plurality of unit rows and a plurality of unit columns, at least one circuit unit may include a pixel driving circuit, and the pixel driving circuit is configured to output a corresponding current to the connected light-emitting device.
- the light-emitting structure layer may include a plurality of light-emitting units, at least one light-emitting unit may include a light-emitting device, the light-emitting device is connected to the pixel driving circuit of the corresponding circuit unit, and the light-emitting device is configured to emit light of corresponding brightness in response to the current output by the connected pixel driving circuit.
- the circuit unit mentioned in the present disclosure refers to an area divided according to a pixel driving circuit
- the light-emitting unit mentioned in the present disclosure refers to an area divided according to a light-emitting device.
- the position and shape of the orthographic projection of the light-emitting unit on the substrate may correspond to the position and shape of the orthographic projection of the circuit unit on the substrate, or the position and shape of the orthographic projection of the light-emitting unit on the substrate may not correspond to the position and shape of the orthographic projection of the circuit unit on the substrate.
- a substrate may include a plurality of circuit units constituting a plurality of unit rows and a plurality of unit columns, at least one circuit unit includes a pixel driving circuit and at least one control line, and the control line is configured to provide a light-emitting control signal to the pixel driving circuit; in at least one circuit unit, the pixel driving circuit includes at least a driving transistor, a first light-emitting control transistor, and a second light-emitting control transistor, a first electrode of the first light-emitting control transistor is connected to a first power line, a second electrode of the first light-emitting control transistor is connected to a first electrode of the driving transistor, and a first electrode of the second light-emitting control transistor is connected to a second electrode of the driving transistor; the first light-emitting control transistor and the second light-emitting control transistor are connected to different control lines, and the first light-emitting control transistor and the second light-emitting control transistor are respectively arranged on both sides
- At least one control line includes a first signal line and a second signal line
- the first light emission control transistor is connected to the first signal line
- the second light emission control transistor is connected to the second signal line
- the first signal line and the second signal line are respectively arranged on both sides of the column direction of the driving transistor unit.
- At least one control line includes a light emission signal line connected to the second light emission control transistor in a present cell row, and the light emission signal line is connected to the first light emission control transistor in a next cell row.
- the display substrate of the exemplary embodiments of the present disclosure is described below by way of some examples.
- FIG4 is a schematic diagram of an equivalent circuit of a pixel driving circuit of an exemplary embodiment of the present disclosure.
- the pixel driving circuit may include 7 transistors (first transistor T1 to seventh transistor T7) and 1 storage capacitor C, and the pixel driving circuit is respectively connected to 9 signal lines (first scanning signal line S1, second scanning signal line S2, third scanning signal line S3, first signal line EM1, second signal line EM2, first initial signal line INIT1, second initial signal line INIT2, first power line VDD and data signal line DATA).
- the pixel driving circuit may include a first node N1, a second node N2, a third node N3, and a fourth node N4.
- the first node N1 is respectively connected to the second electrode of the first transistor T1, the first electrode of the second transistor T2, the gate electrode of the third transistor T3, and the second end of the storage capacitor C
- the second node N2 is respectively connected to the first electrode of the third transistor T3, the second electrode of the fourth transistor T4, and the second electrode of the fifth transistor T5
- the third node N3 is respectively connected to the second electrode of the second transistor T2, the second electrode of the third transistor T3, and the first electrode of the sixth transistor T6
- the fourth node N4 is respectively connected to the second electrode of the sixth transistor T6 and the second electrode of the seventh transistor T7
- the fourth node N4 is also connected to the first electrode of the light emitting device EL.
- a first end of the storage capacitor C is connected to the first power line VDD, and a second end of the storage capacitor C is connected to the first node N1.
- a gate electrode of the first transistor T1 is connected to the second scan signal line S2, a first electrode of the first transistor T1 is connected to the first initial signal line INIT1, and a second electrode of the first transistor is connected to the first node N1.
- a gate electrode of the second transistor T2 is connected to the first scan signal line S1, a first electrode of the second transistor T2 is connected to the first node N1, and a second electrode of the second transistor T2 is connected to the third node N3.
- a gate electrode of the third transistor T3 is connected to The first node N1 is connected, the first electrode of the third transistor T3 is connected to the second node N2, and the second electrode of the third transistor T3 is connected to the third node N3.
- the gate electrode of the fourth transistor T4 is connected to the third scan signal line S3, the first electrode of the fourth transistor T4 is connected to the data signal line DATA, and the second electrode of the fourth transistor T4 is connected to the second node N2.
- the gate electrode of the fifth transistor T5 is connected to the first signal line EM1, the first electrode of the fifth transistor T5 is connected to the first power supply line VDD, and the second electrode of the fifth transistor T5 is connected to the second node N2.
- the gate electrode of the sixth transistor T6 is connected to the second signal line EM2, the first electrode of the sixth transistor T6 is connected to the third node N3, and the second electrode of the sixth transistor T6 is connected to the fourth node N4.
- the gate electrode of the seventh transistor T7 is connected to the third scan signal line S3, the first electrode of the seventh transistor T7 is connected to the second initial signal line INIT2, and the second electrode of the seventh transistor T7 is connected to the fourth node N4.
- the present disclosure connects the fifth transistor T5 to the first signal line EM1 and the sixth transistor T6 to the second signal line EM2, that is, the fifth transistor T5 and the sixth transistor T6 are controlled by two light emitting signal lines respectively, thereby realizing separate control of the fifth transistor T5 and the sixth transistor T6.
- the light emitting device EL may be an OLED including a stacked first electrode (anode), an organic light emitting layer, and a second electrode (cathode), or may be a QLED including a stacked first electrode (anode), a quantum dot light emitting layer, and a second electrode (cathode).
- the first electrode of the light emitting device EL is connected to the fourth node N4, and the second electrode of the light emitting device EL is connected to the second power line VSS.
- the signal of the first power line VDD may be a high level signal that is continuously provided
- the signal of the second power line VSS may be a low level signal that is continuously provided.
- the first transistor T1 to the seventh transistor T7 may be a P-type transistor, or may be an N-type transistor. Using the same type of transistors in the pixel driving circuit can simplify the process flow, reduce the process difficulty of the display panel, and improve the yield of the product. In some possible implementations, the first transistor T1 to the seventh transistor T7 may include a P-type transistor and an N-type transistor.
- the first transistor T1 to the seventh transistor T7 may be a low-temperature polysilicon thin film transistor, or an oxide thin film transistor, or a low-temperature polysilicon thin film transistor and an oxide thin film transistor.
- the active layer of the low-temperature polysilicon thin film transistor is low-temperature polysilicon (LTPS), and the active layer of the oxide thin film transistor is oxide semiconductor (Oxide).
- LTPS low-temperature polysilicon
- Oxide oxide semiconductor
- the low-temperature polysilicon thin film transistor has the advantages of high mobility and fast charging, and the oxide thin film transistor has the advantages of low leakage current.
- the low-temperature polysilicon thin film transistor and the oxide thin film transistor are integrated on a display substrate to form a low-temperature polycrystalline oxide (LTPO) display substrate, which can take advantage of the advantages of both, realize low-frequency driving, reduce power consumption, and improve display quality.
- LTPO low-temperature polycrystalline oxide
- FIG5 is a schematic diagram of a structure of a display substrate according to an exemplary embodiment of the present disclosure, illustrating a planar structure of eight circuit units (two unit rows and four unit columns).
- the display substrate may include a plurality of circuit units, a plurality of circuit units sequentially arranged along a first direction X is called a unit row, a plurality of circuit units sequentially arranged along a second direction Y is called a unit column, a plurality of unit rows and a plurality of unit columns constitute an array of circuit units arranged in an array, and the first direction X intersects with the second direction Y.
- At least one circuit unit may include a pixel driving circuit, which is respectively connected to a first power line 61, a first signal line 91, and a second signal line 92, the first power line 61 is configured to provide a first power signal to the pixel driving circuit, the first signal line 91 is configured to provide a first light-emitting control signal to the pixel driving circuit, and the second signal line 92 is configured to provide a second light-emitting control signal to the pixel driving circuit, and the first light-emitting control signal and the second light-emitting control signal are different signals.
- the first signal line 91 and the second signal line 92 may be in the shape of a straight line or a zigzag line with the main part extending along the first direction X
- the first power line 61 may be in the shape of a straight line or a zigzag line with the main part extending along the second direction Y.
- a extending along the direction of B means that A may include a main part and a secondary part connected to the main part.
- the main part is a line, a line segment or a strip-shaped body, the main part extends along direction B, and the length of the main part extending along direction B is greater than the length of the secondary part extending along other directions.
- “A extends along direction B” means “the main part of A extends along direction B”.
- At least one pixel driving circuit may include at least a plurality of transistors, and the plurality of transistors may include at least a third transistor T3 as a driving transistor, a fifth transistor T5 as a first light emission control transistor, and a sixth transistor T6 as a second light emission control transistor.
- a gate electrode of the fifth transistor T5 is connected to the first signal line 91
- a first electrode of the fifth transistor T5 is connected to the first power line 61
- a second electrode of the fifth transistor T5 is connected to the first electrode of the third transistor T3
- a gate electrode of the sixth transistor T6 is connected to the second signal line 92
- a first electrode of the sixth transistor T6 is connected to the second electrode of the third transistor T3.
- the fifth transistor T5 and the sixth transistor T6 may be disposed on both sides of the third transistor T3 in the first direction X (unit row direction).
- the fifth transistor T5 may be disposed on one side of the third transistor T3 in the opposite direction of the first direction X
- the sixth transistor T6 may be disposed on one side of the third transistor T3 in the first direction X.
- the fifth transistor T5 and the sixth transistor T6 may be disposed on both sides of the third transistor T3 in the second direction Y (unit column direction).
- the fifth transistor T5 may be disposed on one side of the third transistor T3 in the opposite direction of the second direction Y
- the sixth transistor T6 may be disposed on one side of the third transistor T3 in the second direction Y.
- the first signal line 91 and the second signal line 92 may be disposed on both sides of the third transistor T3 in the second direction Y (unit column direction).
- the first signal line 91 may be disposed on one side of the third transistor T3 in the opposite direction of the second direction Y
- the second signal line 92 may be disposed on one side of the third transistor T3 in the second direction Y.
- the display substrate in a direction perpendicular to the display substrate, may include a plurality of conductive layers, and the first signal line 91 and the second signal line 92 may be disposed in different conductive layers.
- the sixth transistor T6 may include at least a sixth gate electrode, which may serve as the second gate of the present disclosure, and the sixth gate electrode and the second signal line 92 may be disposed in different conductive layers, and the second signal line 92 may be connected to the sixth gate electrode through a via.
- the sixth gate electrode and the first signal line 91 may be provided in the same conductive layer.
- the pixel driving circuit may further include a second transistor T2 as a compensation transistor.
- a gate electrode of the second transistor T2 is connected to the first scanning signal line 21, a first electrode of the second transistor T2 is connected to a gate electrode of the third transistor T3 through a first connection electrode 41, and a second electrode of the second transistor T2 is connected to a second electrode of the third transistor T3 and a first electrode of the sixth transistor T6, respectively.
- the orthographic projection of the first connecting electrode 41 on the display substrate plane at least partially overlaps with the orthographic projection of the first signal line 91 on the display substrate plane
- the orthographic projection of the first connecting electrode 41 on the display substrate plane at least partially overlaps with the orthographic projection of the first scanning signal line 21 on the display substrate plane, that is, the first connecting electrode 41 overlaps with the first signal line 91 and the first scanning signal line 21 at the same time.
- the pixel driving circuit may further include a first transistor T1 as a first initialization transistor, the gate electrode of the first transistor T1 is connected to the second scanning signal line 22, the first electrode of the first transistor T1 is connected to the first initial signal line 31, the second electrode of the first transistor T1 is connected to the gate electrode of the third transistor T3 via the first connecting electrode 41, the first initial signal line 31 is configured to provide a first initial signal to the pixel driving circuit, and the shape of the first initial signal line 31 may be a straight line or a broken line extending along the first direction X.
- At least one circuit unit may further include a first connection line 81 extending along the second direction Y, the first connection line 81 being connected to the first initial signal line 31 to form a mesh connection structure for transmitting the first initial signal on the display substrate.
- the pixel driving circuit may further include a seventh transistor T7 as a second initialization transistor, wherein a gate electrode of the seventh transistor T7 is connected to the third scanning signal line 23, a first electrode of the seventh transistor T7 is connected to a second initialization signal line 32, a second electrode of the seventh transistor T7 is connected to a second electrode of the sixth transistor T6, and the second initialization signal line 32 is configured to provide a second initialization signal to the pixel driving circuit.
- the shape of the second initialization signal line 32 may be A straight line or a broken line extending along the first direction X.
- At least one circuit unit may further include a second connection line 82 extending along the second direction Y, the second connection line 82 being connected to the second initial signal line 32 to form a mesh connection structure for transmitting the second initial signal on the display substrate.
- first preliminary signal line 31 and the second preliminary signal line 32 may be disposed in each cell row, and the first connection lines 81 and the second connection lines 82 may be alternately disposed in a plurality of cell columns.
- the pixel driving circuit may further include a fourth transistor T4 as a data writing transistor, a gate electrode of the fourth transistor T4 is connected to the third scanning signal line 23, a first electrode of the fourth transistor T4 is connected to the data signal line 62, a second electrode of the fourth transistor T4 is connected to a first electrode of the third transistor T3, and the second transistor T2 and the fourth transistor T4 may be arranged on both sides of the second direction Y (unit column direction) of the third transistor T3.
- the second transistor T2 may be arranged on one side of the second direction Y of the third transistor T3 in the opposite direction
- the fourth transistor T4 may be arranged on one side of the second direction Y of the third transistor T3.
- the display substrate in a plane perpendicular to the display substrate, may include a semiconductor layer, a first conductive layer, a second conductive layer, a third conductive layer, and a fourth conductive layer sequentially disposed on a substrate.
- the semiconductor layer may include an active layer of a plurality of transistors
- the first conductive layer may include at least a first signal line 91, a plurality of scanning signal lines, and gate electrodes of a plurality of transistors
- the second conductive layer may include at least a second initial signal line 32
- the third conductive layer may include at least a first initial signal line 31, a second signal line 92, and a plurality of connection electrodes
- the fourth conductive layer may include at least a first power line 61, a first connection line 81, and a second connection line 82.
- the display substrate may further include a first insulating layer, a second insulating layer, a third insulating layer, a fourth insulating layer and a first flat layer
- the first insulating layer may be disposed between the substrate and the semiconductor layer
- the second insulating layer may be disposed between the semiconductor layer and the first conductive layer
- the third insulating layer may be disposed between the first conductive layer and the second conductive layer
- the fourth insulating layer may be disposed between the second conductive layer and the third conductive layer
- the first flat layer may be disposed between the third conductive layer and the fourth conductive layer.
- the "patterning process” mentioned in the present disclosure includes deposition of film layers, coating of photoresist on the film layers, mask exposure, development, etching, stripping of photoresist and other processes for metal materials, inorganic materials or transparent conductive materials, and includes coating of organic materials, mask exposure and development and other processes for organic materials.
- Deposition can be any one or more of sputtering, evaporation, chemical vapor deposition, coating can be any one or more of spraying, spin coating and inkjet printing, and etching can be any one or more of dry etching and wet etching, which are not limited in the present disclosure.
- Thin film refers to a layer of thin film made of a certain material on a substrate by deposition, coating or other processes. If the "thin film” does not require a patterning process during the entire production process, the “thin film” can also be called a “layer”. If the "thin film” requires a patterning process during the entire production process, it is called a “thin film” before the patterning process and a “layer” after the patterning process. The “layer” after the patterning process contains at least one "pattern”.
- the "A and B are arranged in the same layer” mentioned in the present disclosure means that A and B are formed simultaneously through the same patterning process, and the "thickness" of the film layer is the size of the film layer in the direction perpendicular to the display substrate.
- the orthographic projection of B is within the range of the orthographic projection of A” or "the orthographic projection of A includes the orthographic projection of B” means that the boundary of the orthographic projection of B falls within the boundary of the orthographic projection of A, or the boundary of the orthographic projection of A overlaps with the boundary of the orthographic projection of B.
- the preparation process of the display substrate of this embodiment may include the following operations.
- Forming a semiconductor layer pattern may include: sequentially depositing a first insulating film and a semiconductor film on a substrate, patterning the semiconductor film through a patterning process to form a first insulating layer covering the substrate, and a semiconductor layer disposed on the first insulating layer, as shown in FIG. 6 .
- the semiconductor layer of each circuit unit may include a first active layer 11 of a first transistor T1 to a seventh active layer 17 of a seventh transistor T7, and the first active layer 11 and the second active layer 12 are an integral structure connected to each other, and the third active layer 13 to the seventh active layer 17 are an integral structure connected to each other.
- the fourth active layer 14 and the fifth active layer 15 in the Nth unit column may be located on a side of the third active layer 13 of the present circuit unit away from the N+1th unit column, and the sixth active layer 16 may be located on a side of the third active layer 13 of the present circuit unit close to the N+1th unit column, that is, the fifth active layer 15 and the sixth active layer 16 are respectively located on both sides of the third active layer 13 in the first direction X.
- the first active layer 11, the second active layer 12 and the fifth active layer 15 in the Mth unit row can be located on the side of the third active layer 13 of the present circuit unit away from the M+1th unit row, and the fourth active layer 14, the sixth active layer 16 and the seventh active layer 17 can be located on the side of the third active layer 13 of the present circuit unit close to the M+1th unit row, that is, the fifth active layer 15 and the sixth active layer 16 are respectively located on both sides of the third active layer 13 in the second direction Y.
- the present disclosure arranges the fifth transistor T5 and the sixth transistor T6 on both sides of the third transistor T3 in the first direction X and the second direction Y, thereby facilitating separate control of the fifth transistor T5 and the sixth transistor T6.
- the first active layer 11 may be shaped like an "n" shape
- the second active layer 12 and the seventh active layer 17 may be shaped like an "L” shape
- the third active layer 13 may be shaped like an " ⁇ ” shape
- the fourth active layer 14, the fifth active layer 15, and the sixth active layer 16 may be shaped like an "I”.
- the active layer of each transistor may include a first region, a second region, and a channel region located between the first region and the second region.
- the second region 11-2 of the first active layer may serve as the first region 12-1 of the second active layer, that is, the second region 11-2 of the first active layer and the first region 12-1 of the second active layer are connected to each other.
- the first region 13-1 of the third active layer may serve as the second region 14-2 of the fourth active layer and the second region 15-2 of the fifth active layer at the same time, that is, the first region 13-1 of the third active layer, the second region 14-2 of the fourth active layer, and the second region 15-2 of the fifth active layer are connected to each other.
- the second region 13-2 of the third active layer may serve as the first region 16-1 of the sixth active layer, that is, the second region 13-2 of the third active layer and the first region 16-1 of the sixth active layer are connected to each other.
- the second region 16-2 of the sixth active layer may serve as the second region 17-2 of the seventh active layer, that is, the second region 16-2 of the sixth active layer and the second region 17-2 of the seventh active layer are connected to each other.
- the first region 11 - 1 of the first active layer 11 , the second region 12 - 2 of the second active layer, the first region 14 - 1 of the fourth active layer, the first region 15 - 1 of the fifth active layer, and the first region 17 - 1 of the seventh active layer may be separately provided.
- the first semiconductor layer may be made of polycrystalline silicon (p-Si), that is, the first transistor to the seventh transistor are LTPS transistors.
- patterning the first semiconductor film through a patterning process may include: first forming an amorphous silicon (a-si) film on the first insulating film, dehydrogenating the amorphous silicon film, and crystallizing the amorphous silicon film after the dehydrogenation to form a polycrystalline silicon film. Subsequently, the polycrystalline silicon film is patterned to form a first semiconductor layer pattern.
- forming the first conductive layer pattern may include: depositing a second insulating film and a first conductive film in sequence on the substrate on which the aforementioned pattern is formed, patterning the first conductive film by a patterning process, forming a second insulating layer covering the semiconductor layer pattern, and a first conductive layer pattern disposed on the second insulating layer, as shown in FIGS. 7A and 7B , where FIG. 7B is a plan view schematic diagram of the first conductive layer in FIG. 7A .
- the first conductive layer may be referred to as a first gate metal (GATE1) layer.
- the first conductive layer pattern of each circuit unit includes at least a first scan signal line 21 , a second scan signal line 22 , a third scan signal line 23 , a sixth gate electrode 26 , a first plate 71 of a storage capacitor, and a first signal line 91 .
- the shape of the first electrode plate 71 may be rectangular, and the corners of the rectangle may be provided with chamfers or grooves, and the orthographic projection of the first electrode plate 71 on the substrate at least partially overlaps with the orthographic projection of the third active layer of the third transistor T3 on the substrate.
- the first electrode plate 71 may simultaneously serve as a plate of the storage capacitor and a gate electrode of the third transistor T3.
- the shape of the first scanning signal line 21 can be a straight line or a folded line with a main part extending along the first direction X.
- the first scanning signal line 21 can be located on the side of the first electrode plate 71 opposite to the second direction Y.
- the side of the first scanning signal line 21 away from the first electrode plate 71 is connected to the gate block 21-1.
- the area where the line 21 and the gate block 21 - 1 overlap with the second active layer may serve as a gate electrode of the second transistor T2 of the double-gate structure.
- the shape of the second scan signal line 22 can be a straight line or a broken line with the main part extending along the first direction X.
- the second scan signal line 22 can be located on the side of the first scan signal line 21 away from the first electrode plate 71, and the area where the second scan signal line 22 overlaps with the first active layer can serve as the gate electrode of the first transistor T1 of the dual-gate structure.
- the shape of the third scan signal line 23 can be a straight line or a broken line with the main part extending along the first direction X.
- the third scan signal line 23 can be located on the side of the first electrode 71 in the opposite direction of the second direction Y.
- the area where the third scan signal line 23 overlaps with the fourth active layer can be used as the gate electrode of the fourth transistor T4, and the area where the third scan signal line 23 overlaps with the seventh active layer can be used as the gate electrode of the seventh transistor T7, that is, the fourth transistor T4 and the seventh transistor T7 of the present disclosure are controlled to be turned on and off by the same scan signal line.
- the shape of the first signal line 91 can be a straight line or a broken line with the main part extending along the first direction X.
- the first signal line 91 can be located between the first scanning signal line 21 and the first electrode plate 71, and the area where the first signal line 91 overlaps with the fifth active layer can serve as the gate electrode of the fifth transistor T5.
- the sixth gate electrode 26 may be in a strip shape extending along the first direction X, and the sixth gate electrode 26 may be located between the third scan signal line 23 and the first electrode plate 71, and the region where the sixth gate electrode 26 overlaps with the sixth active layer may serve as the gate electrode of the sixth transistor T6.
- the sixth gate electrode 26 is configured to be connected to a second signal line formed subsequently.
- the first scan signal line 21, the second scan signal line 22, the third scan signal line 23 and the first signal line 91 may include an overlapping area with the first semiconductor layer and a non-overlapping area with the first semiconductor layer.
- the width of at least one signal line in the area overlapping with the first semiconductor layer may be greater than the width of at least one signal line in the area non-overlapping with the first semiconductor layer, and the width may be the dimension in the second direction Y.
- the semiconductor layer can be conductorized using the first conductive layer as a shield, and the semiconductor layer in the area shielded by the first conductive layer forms the channel region of the first transistor T1 to the seventh transistor T7, and the semiconductor layer in the area not shielded by the first conductive layer is conductorized, that is, the first area and the second area of the first active layer to the seventh active layer are both conductorized.
- Forming a second conductive layer pattern may include: depositing a third insulating film and a second conductive film in sequence on the substrate on which the aforementioned pattern is formed, patterning the second conductive film using a patterning process to form a third insulating layer covering the first conductive layer, and a second conductive layer pattern disposed on the third insulating layer, as shown in FIGS. 8A and 8B , where FIG. 8B is a plan view of the second conductive layer in FIG. 8A .
- the second conductive layer may be referred to as a second gate metal (GATE2) layer.
- the second conductive layer pattern of each circuit unit may include at least: a second initial signal line 32 and a second electrode plate 72 of a storage capacitor.
- the outline of the second electrode plate 72 can be rectangular, and the corners of the rectangle can be chamfered.
- the orthographic projection of the second electrode plate 72 on the substrate at least partially overlaps with the orthographic projection of the first electrode plate 71 on the substrate.
- the second electrode plate 72 can serve as another electrode plate of the storage capacitor, and the first electrode plate 71 and the second electrode plate 72 constitute the storage capacitor of the pixel driving circuit.
- an opening 75 is provided on the second electrode plate 72.
- the opening 75 may be rectangular and may be located in the middle region of the second electrode plate 72, so that the second electrode plate 72 forms a ring structure.
- the opening 75 exposes the third insulating layer covering the first electrode plate 71, and the orthographic projection of the first electrode plate 71 on the substrate includes the orthographic projection of the opening 75 on the substrate.
- the opening 75 is configured to accommodate a ninth via hole formed subsequently.
- the ninth via hole is located in the opening 75 and exposes the first electrode plate 71, so that the first connecting electrode formed subsequently is connected to the first electrode plate 71.
- the second conductive layer of each circuit unit may further include a plate connecting bar 76.
- the plate connecting bar 76 may be in the shape of a bar extending along the first direction X.
- the plate connecting bar 76 may be disposed in the second On one side of the electrode 72 in the first direction X or the side in the opposite direction of the first direction X, the first end of the electrode connecting strip 76 is connected to the second electrode 72 in the circuit unit, and the second end of the electrode connecting strip 76 is connected to the second electrode 72 in the circuit unit adjacent to the first direction X, so that the second electrodes 72 in adjacent circuit units in a unit row are interconnected as an integrated structure.
- the second electrode 72 in each circuit unit is connected to the first power line formed subsequently, by forming the second electrode plates 72 of adjacent circuit units into an integrated structure interconnected, the second electrode plates of the integrated structure can be reused as a power signal line, which can ensure that multiple second electrodes in a unit row have the same potential, which is conducive to improving the uniformity of the panel, avoiding poor display of the display substrate, and ensuring the display effect of the display substrate.
- the shape of the second initial signal line 32 may be a straight line or a folded line with a main portion extending along the first direction X, and the second initial signal line 32 may be located on a side of the third scan signal line 23 away from the second electrode plate 72.
- the second initial signal line 32 is configured to be connected to the first region of the seventh active layer through a sixth connection electrode formed subsequently.
- Forming a fourth insulating layer pattern may include: depositing a fourth insulating film on the substrate on which the aforementioned pattern is formed, patterning the fourth insulating film using a patterning process to form a fourth insulating layer covering the second conductive layer, wherein a plurality of vias are disposed on the fourth insulating layer, as shown in FIG. 9 .
- the multiple vias in each circuit unit may include at least: a first via V1, a second via V2, a third via V3, a fourth via V4, a fifth via V5, a sixth via V6, a seventh via V7, an eighth via V8, a ninth via V9, a tenth via V10, an eleventh via V11 and a twelfth via V12.
- the orthographic projection of the first via hole V1 on the substrate is located within the range of the orthographic projection of the first region of the first active layer on the substrate, the fourth insulating layer, the third insulating layer, and the second insulating layer in the first via hole V1 are etched away to expose the surface of the first region of the first active layer, and the first via hole V1 is configured to connect a subsequently formed first initial connection block to the first region of the first active layer through the via hole.
- the orthographic projection of the second via hole V2 on the substrate is located within the range of the orthographic projection of the second area of the first active layer (also the first area of the second active layer) on the substrate, the fourth insulating layer, the third insulating layer and the second insulating layer in the second via hole V2 are etched away to expose the surface of the second area of the first active layer, and the second via hole V2 is configured to connect a subsequently formed first connecting electrode to the second area of the first active layer (also the first area of the second active layer) through the via hole.
- the orthographic projection of the third via hole V3 on the substrate is located within the range of the orthographic projection of the second region of the second active layer on the substrate, the fourth insulating layer, the third insulating layer and the second insulating layer in the third via hole V3 are etched away to expose the surface of the second region of the second active layer, and the third via hole V3 is configured to connect a subsequently formed fifth connecting electrode to the second region of the second active layer through the via hole.
- the orthographic projection of the fourth via hole V4 on the substrate is located within the range of the orthographic projection of the second area of the third active layer (also the first area of the sixth active layer) on the substrate, the fourth insulating layer, the third insulating layer and the second insulating layer in the fourth via hole V4 are etched away to expose the surface of the second area of the third active layer, and the fourth via hole V4 is configured to connect a subsequently formed fifth connecting electrode to the second area of the third active layer (also the first area of the sixth active layer) through the via hole.
- the orthographic projection of the fifth via hole V5 on the substrate is located within the range of the orthographic projection of the first area of the fourth active layer on the substrate, the fourth insulating layer, the third insulating layer and the second insulating layer in the fifth via hole V5 are etched away to expose the surface of the first area of the fourth active layer, and the fifth via hole V5 is configured to connect a subsequently formed third connecting electrode to the first area of the fourth active layer through the via hole.
- the orthographic projection of the seventh via hole V7 on the substrate is located in the second region (also referred to as the sixth active layer) of the sixth active layer.
- the fourth insulating layer, the third insulating layer and the second insulating layer in the seventh via hole V7 are etched away to expose the surface of the second area of the sixth active layer, and the seventh via hole V7 is configured to connect a subsequently formed fourth connecting electrode to the second area of the sixth active layer (which is also the second area of the seventh active layer) through the via hole.
- the orthographic projection of the eighth via hole V8 on the substrate is located within the range of the orthographic projection of the first area of the seventh active layer on the substrate, the fourth insulating layer, the third insulating layer and the second insulating layer in the eighth via hole V8 are etched away to expose the surface of the first area of the seventh active layer, and the eighth via hole V8 is configured to connect a subsequently formed sixth connecting electrode to the first area of the seventh active layer through the via hole.
- the orthographic projection of the eleventh via hole V11 on the substrate is located within the range of the orthographic projection of the second initial signal line 32 on the substrate, the fourth insulating layer in the eleventh via hole V11 is etched away to expose the surface of the second initial signal line 32, and the eleventh via hole V11 is configured to connect a subsequently formed sixth connecting electrode to the second initial signal line 32 through the via hole.
- the shape of the first initial signal line 31 can be a straight line or a broken line extending along the first direction X.
- the first initial signal line 31 can be located on the side of the first scanning signal line 21 away from the second electrode 72.
- the positive projection of the first initial signal line 31 on the substrate at least partially overlaps with the positive projection of the second scanning signal line 22 on the substrate.
- the first initial signal line 31 with a constant voltage can play a shielding role, reducing the influence of the second scanning signal line 22 on the pixel driving circuit.
- a first power connection block 42-1 may be provided between the first end and the second end of the second connection electrode 42.
- the shape of the first power connection block 42-1 may be block-shaped (such as a rectangle).
- the orthographic projection of the first power connection block 42-1 on the substrate may be located within the range of the orthographic projection of the second electrode plate 72 on the substrate.
- the first power connection block 42-1 is configured to be connected to a first power line formed subsequently.
- the sixth connection electrode 46 in a part of the circuit unit may be connected to an initial connection block 46-1
- the shape of the initial connection block 46-1 may be a block shape (such as a rectangle)
- the initial connection block 46-1 is configured to be connected to a second connection line formed subsequently.
- the initial connection block 46-1 may be provided in the circuit unit of the Nth unit column and the N+2th unit column.
- the twenty-first via hole V21 may be referred to as a power via hole, and the orthographic projection of the twenty-first via hole V21 on the substrate may be located within the range of the orthographic projection of the second electrode plate 72 on the substrate.
- the orthographic projection of the twenty-second via hole V22 on the substrate is located within the range of the orthographic projection of the third connecting electrode 43 on the substrate, the first flat layer in the twenty-second via hole V22 is removed to expose the surface of the third connecting electrode 43, and the twenty-second via hole V22 is configured to connect a subsequently formed data signal line to the third connecting electrode 43 through the via hole.
- an orthographic projection of the first connection line 81 on the substrate does not overlap with an orthographic projection of the gate electrode (ie, the first plate) of the third transistor on the substrate.
- an orthographic projection of the first connection line 81 on the substrate at least partially does not overlap with an orthographic projection of an active connection line 18 connecting the second active layer and the third active layer in the semiconductor layer on the substrate.
- an orthographic projection of the second connection line 82 on the substrate does not overlap with an orthographic projection of the gate electrode (ie, the first plate) of the third transistor on the substrate.
- an orthographic projection of the second connection line 82 on the substrate at least partially does not overlap with an orthographic projection of the active connection line 18 connecting the second active layer and the third active layer in the semiconductor layer on the substrate.
- FIG30C and 30D are schematic diagrams of another initial signal mesh connection structure and a second power mesh connection structure of an exemplary embodiment of the present disclosure.
- the first initial signal line 31, the second initial signal line 32 and the third connection line 83 can be arranged in each unit row, and the first connection line 81, the second power line 64, the second connection line 82 and the second power line 64 can be arranged alternately in four consecutive unit columns.
- the Nth unit column can be provided with a second connection line 82
- the N+1th unit column can be provided with a second power line 64
- the N+2th unit column can be provided with a first connection line 81
- the N+3th unit column can be provided with a second power line 64.
- the first initial signal line 31, the second initial signal line 32 and the third connection line 83 can be arranged in each unit row, and the first connection line 81, the second power line 64, the second connection line 82 and the second power line 64 can be arranged alternately in eight consecutive unit columns.
- forming the second planar layer pattern may include: coating a second planar film on the substrate on which the aforementioned pattern is formed, patterning the second planar film using a patterning process to form a second planar layer covering the fourth conductive layer, wherein a plurality of anode vias are provided on the second planar layer, and the anode vias are configured to connect a subsequently formed anode to the anode connection electrode through the vias.
- a light emitting structure layer is first prepared on the driving circuit layer, and then a packaging structure layer is formed, which will not be described in detail here.
- the display substrate provided in this embodiment also realizes the separate control of the fifth transistor and the sixth transistor, which can realize ultra-high frequency and higher precision pulse width modulation, light signal duty cycle compensation, low grayscale compensation and improved afterimage.
- the sixth transistor T6 is controlled by the light signal line of the unit row
- the fifth transistor T5 is controlled by the light-emitting signal line of the previous unit row, that is, the fifth transistor T5 adopts the light-emitting signal line drive (cascade) method of the sixth transistor T6 of the previous level, which can not only reduce the capacitance of the first node N1 and avoid the first node N1 being affected by the light-emitting signal line, but also reduce the number of light-emitting signal lines, which is conducive to achieving high resolution.
- the display substrate of this embodiment adopts the 2SD mode and adds the first capacitor to form a mesh connection structure of the second power supply signal, a mesh connection structure of the first initial signal and a mesh connection structure of the second initial signal on the display substrate, thereby further improving the display effect.
- Figures 31A and 31B are schematic diagrams of another display substrate of the present disclosure after forming an anode conductive layer pattern
- Figure 31B is a plan schematic diagram of the anode conductive layer in Figure 31A.
- a virtual electrode is provided in the third conductive layer or the fourth conductive layer, the consistency of the film layer in each sub-pixel can be ensured by providing an auxiliary electrode in the anode conductive layer.
- the anode conductive layer may include a plurality of anodes 90, each anode 90 may be connected to the anode connection electrode of the corresponding circuit unit through an anode via, an auxiliary electrode 90A may be provided on at least one anode 90, a first end of the auxiliary electrode 90A is connected to the anode 90, a second end of the auxiliary electrode 90A extends in a direction away from the anode 90, and the positive projection of the auxiliary electrode 90A on the substrate overlaps at least partially with the positive projection of the fourteenth connection electrode as a virtual electrode on the substrate, as shown in FIG. 31A and FIG.
- Figure 32 is a schematic diagram of another display substrate of the present disclosure after forming a pixel definition layer pattern.
- the pixel definition layer may include a plurality of pixel openings K, each of which may expose the surface of the anode, and at least one pixel opening K may be connected to a sub-opening K1, which may expose the surface of the auxiliary electrode.
- the pixel opening K and the sub opening K1 may be communicated with each other.
- FIG33A and 33B are schematic diagrams of another display substrate after forming an anode conductive layer pattern in the present disclosure, and FIG33B is a plan view of the anode conductive layer in FIG33A.
- the structure of the anode conductive layer in this embodiment is substantially the same as that shown in FIG31A and FIG31B, except that the auxiliary electrode 90A is provided separately, that is, the anode 90 is not connected to the auxiliary electrode 90A.
- the anode conductive layer may include a plurality of anodes 90 and at least one auxiliary electrode 90A, each anode 90 may be connected to the anode connection electrode of the corresponding circuit unit through an anode via, and the positive projection of the auxiliary electrode 90A on the substrate overlaps at least partially with the positive projection of the fourteenth connection electrode as a virtual electrode on the substrate, as shown in FIG. 33A and FIG. 33B.
- FIG. 33A and FIG. 33B only illustrate the example of setting an auxiliary electrode 90A in the anode conductive layer.
- the anode conductive layer may be provided with a plurality of auxiliary electrodes 90A, and the plurality of auxiliary electrodes 90A overlap at least partially with the plurality of virtual electrodes, respectively.
- the auxiliary electrode 90A may be set to a floating state. In the subsequent formation of the pixel definition layer, no sub-opening is set at the position of the auxiliary electrode 90A, and the present disclosure does not limit this.
- the present disclosure can ensure the consistency of the film layer in each sub-pixel and reduce visualization defects by setting at least one auxiliary electrode in the anode conductive layer.
- the auxiliary electrode provided on the anode conductive layer may be applied to the structure of the display substrate shown in FIG. 5 and FIG. 27 , and the present disclosure is not limited thereto.
- the structure and preparation process shown above in the present disclosure are merely exemplary.
- the corresponding structure can be changed and the patterning process can be increased or decreased according to actual needs, and the present disclosure does not limit this.
- the display substrate of the present disclosure may be applied to a display device having a pixel driving circuit, such as an OLED, a quantum dot display (QLED), a light emitting diode display (Micro LED or Mini LED), or a quantum dot display (QLED).
- a pixel driving circuit such as an OLED, a quantum dot display (QLED), a light emitting diode display (Micro LED or Mini LED), or a quantum dot display (QLED).
- QLED quantum dot display
- Mini LED micro LED or Mini LED
- QLED quantum dot display
- the present disclosure also provides a display device, which includes the aforementioned display substrate.
- the display device can be any product or component with a display function, such as a mobile phone, a tablet computer, a television, a monitor, a notebook computer, a digital photo frame, a navigator, etc., but the embodiments of the present invention are not limited thereto.
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Abstract
Description
11—第一有源层; 12—第二有源层; 13—第三有源层;
14—第四有源层; 15—第五有源层; 16—第六有源层;
17—第七有源层; 18—有源连接线; 21—第一扫描信号线;
22—第二扫描信号线; 23—第三扫描信号线; 31—第一初始信号线;
32—第二初始信号线; 41—第一连接电极; 42—第二连接电极;
43—第三连接电极; 44—第四连接电极; 45—第五连接电极;
46—第六连接电极; 47—第七连接电极; 48—第八连接电极;
49—第九连接电极; 51—第十一连接电极; 52—第十二连接电极;
53—第十三连接电极; 54—第十四连接电极; 55—第十五连接电极;
56—发光信号连接线; 61—第一电源线; 62—数据信号线;
63—阳极连接电极; 64—第二电源线; 71—第一极板;
72—第二极板; 73—第三极板; 74—第四极板;
75—开口; 76—极板连接条; 81—第一连接线;
82—第二连接线; 83—第三连接线; 90—阳极;
91—第一信号线; 92—第二信号线; 93—发光信号线;
101—基底; 102—驱动电路层; 103—发光结构层;
104—封装结构层。
Claims (24)
- 一种显示基板,包括构成多个单元行和多个单元列的多个电路单元,至少一个电路单元包括像素驱动电路和至少一条控制线,所述控制线被配置为向所述像素驱动电路提供发光控制信号;至少一个电路单元中,所述像素驱动电路至少包括驱动晶体管、第一发光控制晶体管和第二发光控制晶体管,所述第一发光控制晶体管的第一极与第一电源线连接,所述第一发光控制晶体管的第二极与所述驱动晶体管的第一极连接,第二发光控制晶体管的第一极与所述驱动晶体管的第二极连接;所述第一发光控制晶体管和所述第二发光控制晶体管连接不同的控制线,所述第一发光控制晶体管和所述第二发光控制晶体管分别设置在所述驱动晶体管单元列方向的两侧。
- 根据权利要求1所述的显示基板,其中,至少一条控制线包括第一信号线和第二信号线,所述第一发光控制晶体管与所述第一信号线连接,所述第二发光控制晶体管与所述第二信号线连接,所述第一信号线和所述第二信号线分别设置在所述驱动晶体管单元列方向的两侧。
- 根据权利要求2所述的显示基板,其中,在垂直于显示基板的方向上,所述显示基板包括多个导电层,所述第一信号线和所述第二信号线设置在不同的导电层中。
- 根据权利要求3所述的显示基板,其中,所述第二发光控制晶体管至少包括第二栅极,所述第二栅极和所述第一信号线设置在相同的导电层中,所述第二栅极和所述第二信号线设置在不同的导电层中。
- 根据权利要求2所述的显示基板,其中,所述像素驱动电路还包括补偿晶体管,所述补偿晶体管的栅电极与第一扫描信号线连接,所述补偿晶体管的第一极通过第一连接电极与所述驱动晶体管的栅电极连接,所述补偿晶体管的第二极分别与所述驱动晶体管的第二极和第二发光控制晶体管的第一极连接;所述第一连接电极在显示基板平面上的正投影与所述第一信号线在显示基板平面上的正投影至少部分交叠,所述第一连接电极在显示基板平面上的正投影与所述第一扫描信号线在显示基板平面上的正投影至少部分交叠。
- 根据权利要求5所述的显示基板,其中,所述补偿晶体管至少包括补偿有源层,所述第二发光控制晶体管至少包括第二发光控制有源层,所述补偿有源层的第二区通过第五连接电极与所述第二发光控制有源层的第一区连接;在垂直于显示基板的方向上,所述显示基板至少包括至少一个半导体层和至少一个导电层,所述补偿有源层和第二发光控制有源层设置在所述半导体层中,所述第五连接电极设置在所述导电层中。
- 根据权利要求5所述的显示基板,其中,所述像素驱动电路还包括数据写入晶体管,所述数据写入晶体管的第一极与数据信号线连接,所述数据写入晶体管的第二极与与所述驱动晶体管的第一极连接,所述数据写入晶体管和所述补偿晶体管分别设置在所述驱动晶体管单元列方向的两侧。
- 根据权利要求1所述的显示基板,其中,至少一条控制线包括发光信号线,所述发光信号线与本单元行中的所述第二发光控制晶体管连接,所述发光信号线与下一个单元行中的所述第一发光控制晶体管连接。
- 根据权利要求8所述的显示基板,其中,所述第一发光控制晶体管至少包括第一栅极,所述第二发光控制晶体管至少包括第二栅极,所述发光信号线与本单元行中的所述第二栅极连接,所述发光信号线通过发光信号连接线与下一个单元行中的所述第一发光控制晶体管连接。
- 根据权利要求9所述的显示基板,其中,在垂直于显示基板的方向上,所述显示基板包括多个导电层,所述第一栅极和所述第二栅极设置在相同的导电层中,所述第一栅极和所述发光信号线设置在不同的导电层中,所述第一栅极和所述发光信号连接线设置在不同的导电层中,所述发光信号连接线和所述发光信号线设置在不同的导电层中。
- 根据权利要求10所述的显示基板,其中,所述多个导电层至少包括在基底上沿着远离基底方向依次设置的第一导电层、第二导电层、第三导电层和第四导电层,所述第一栅极和所述第二栅极设置在所述第一导电层中,所述发光信号线设置在所述第三导电层中,所述发光信号线通过过孔与所述第二栅极连接,所述发光信号连接线设置在所述第四导电层中,所述发光信号连接线的第一端通过过孔与本单元行中的所述发光信号线连接,所述发光信号连接线的第二端通过过孔与下一个单元行中的所述第一栅极连接。
- 根据权利要求11所述的显示基板,其中,所述多个导电层还包括设置在所述第四导电层远离所述基底一侧的第五导电层,所述第一电源线设置在所述第五导电层中,所述第一电源线在显示基板平面上的正投影与所述发光信号连接线在显示基板平面上的正投影至少部分交叠。
- 根据权利要求1至12任一项所述的显示基板,其中,至少一个电路单元还包括沿着像素行方向延伸的第一初始信号线和沿着像素列方向延伸的第一连接线,所述第一初始信号线被配置为向所述像素驱动电路提供第一初始信号,所述第一初始信号线和所述第一连接线连接,形成传输所述第一初始信号的网状连通结构。
- 根据权利要求13所述的显示基板,其中,所述第一连接线在显示基板平面上的正投影与所述驱动晶体管的栅电极在显示基板平面上的正投影没有交叠。
- 根据权利要求13所述的显示基板,其中,所述像素驱动电路还包括补偿晶体管,所述补偿晶体管的有源层和所述驱动晶体管的有源层通过有源连接线相互连接,所述第一连接线在显示基板平面上的正投影与所述有源连接线在显示基板平面上的正投影至少部分不交叠。
- 根据权利要求1至12任一项所述的显示基板,其中,至少一个电路单元还包括沿着像素行方向延伸的第二初始信号线和沿着像素列方向延伸的第二连接线,所述第二初始信号线被配置为向所述像素驱动电路提供第二初始信号,所述第二初始信号线和所述第二连接线连接,形成传输所述第二初始信号的网状连通结构。
- 根据权利要求16所述的显示基板,其中,所述第二连接线在显示基板平面上的正投影与所述驱动晶体管的栅电极在显示基板平面上的正投影没有交叠。
- 根据权利要求16所述的显示基板,其中,所述像素驱动电路还包括补偿晶体管,所述补偿晶体管的有源层和所述驱动晶体管的有源层通过有源连接线相互连接,所述第二连接线在显示基板平面上的正投影与所述有源连接线在显示基板平面上的正投影至少部分不交叠。
- 根据权利要求1至12任一项所述的显示基板,其中,至少一个电路单元还包括沿着像素行方向延伸的第三连接线和沿着像素列方向延伸的第二电源线,所述第二电源线和所述第三连接线连接,形成传输第二电源信号的网状连通结构。
- 根据权利要求19所述的显示基板,其中,所述第二电源线在显示基板平面上的正投影与所述驱动晶体管的栅电极在显示基板平面上的正投影没有交叠。
- 根据权利要求19所述的显示基板,其中,所述像素驱动电路还包括补偿晶体管,所述补偿晶体管的有源层和所述驱动晶体管的有源层通过有源连接线相互连接,所述第二电源线在显示基板平面上的正投影与所述有源连接线在显示基板平面上的正投影至少部分不交叠。
- 根据权利要求1至12任一项所述的显示基板,其中,所述像素驱动电路还包括存储电容和第一电容;所述存储电容包括第一极板和第二极板,所述第一极板在显示基板平面上的正投影与所述第二极板在显示基板平面上的正投影至少部分交叠,所述第一极板作为所述驱动晶体管的栅电极,所述第二极板与所述第一电源线连接;所述第一电容包括第三极板和第四极板,所述第三极板在显示基板平面上的正投影与所述第四极板在显示基 板平面上的正投影至少部分交叠,所述第三极板分别与所述驱动晶体管的第一极和所述第一发光控制晶体管的第二极连接,所述第四极板与所述第一电源线连接。
- 根据权利要求22所述的显示基板,其中,在垂直于显示基板的方向上,所述显示基板至少包括在基底上沿着远离基底方向依次设置的半导体层、第一导电层和第二导电层,所述第三极板设置在所述半导体层中,所述第一极板设置在所述第一导电层中,所述第二极板和所述第四极板设置在所述第二导电层中。
- 一种显示装置,包括如权利要求1至23任一项所述的显示基板。
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| PCT/CN2023/121688 WO2025065261A1 (zh) | 2023-09-26 | 2023-09-26 | 显示基板和显示装置 |
| DE112023006963.8T DE112023006963T5 (de) | 2023-09-26 | 2023-09-26 | Anzeigesubstrat und Anzeigevorrichtung |
| US18/842,814 US20260182176A1 (en) | 2023-09-26 | 2023-09-26 | Display Substrate and Display Apparatus |
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- 2023-09-26 WO PCT/CN2023/121688 patent/WO2025065261A1/zh not_active Ceased
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| CN120112981A (zh) | 2025-06-06 |
| DE112023006963T5 (de) | 2026-07-09 |
| WO2025065261A9 (zh) | 2025-05-22 |
| US20260182176A1 (en) | 2026-06-25 |
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