WO2019219057A1 - 显示基板及其修复方法、显示装置 - Google Patents

显示基板及其修复方法、显示装置 Download PDF

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Publication number
WO2019219057A1
WO2019219057A1 PCT/CN2019/087207 CN2019087207W WO2019219057A1 WO 2019219057 A1 WO2019219057 A1 WO 2019219057A1 CN 2019087207 W CN2019087207 W CN 2019087207W WO 2019219057 A1 WO2019219057 A1 WO 2019219057A1
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Prior art keywords
display
drive
circuits
driving
circuit
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PCT/CN2019/087207
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English (en)
French (fr)
Inventor
赵德涛
肖丽
王磊
张粲
王灿
岳晗
玄明花
陈小川
Original Assignee
京东方科技集团股份有限公司
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Priority to US16/618,291 priority Critical patent/US11063067B2/en
Publication of WO2019219057A1 publication Critical patent/WO2019219057A1/zh

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
    • H01L27/02—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers
    • H01L27/12—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body
    • H01L27/1214—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs
    • H01L27/124—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs with a particular composition, shape or layout of the wiring layers specially adapted to the circuit arrangement, e.g. scanning lines in LCD pixel circuits
    • H01L27/1244—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs with a particular composition, shape or layout of the wiring layers specially adapted to the circuit arrangement, e.g. scanning lines in LCD pixel circuits for preventing breakage, peeling or short circuiting
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
    • H01L27/02—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers
    • H01L27/12—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body
    • H01L27/1214—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
    • H01L27/02—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers
    • H01L27/12—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body
    • H01L27/1214—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs
    • H01L27/1259—Multistep manufacturing methods
    • 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
    • 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
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
    • H10K71/861—Repairing

Definitions

  • the present disclosure belongs to the technical field of pixel circuits, and in particular, to a display substrate, a repair method thereof, and a display device.
  • each sub-pixel is provided with a corresponding driving circuit (also referred to as a pixel circuit) to drive display elements in the sub-pixels for display.
  • a driving circuit also referred to as a pixel circuit
  • the structure of the pixel circuit is relatively complicated, it is prone to short-circuit or open-circuit faults, and once the pixel circuit fails and cannot work normally, the display elements in the sub-pixels connected thereto cannot be normally displayed, which may affect the display effect.
  • a display substrate including a plurality of driving circuits configured to drive display elements in respective sub-pixels for display, each of the driving circuits configured to drive display elements in at least one sub-pixel is provided It is shown that the output of each of the driving circuits and the display elements of the at least one sub-pixel driven by the output are connected by a branch having a switching element, the display substrate further comprising: at least one repair line, each of the repairs The line is configured to be associated with at least two drive circuits and is initially disconnected from an output of at least one of the at least two drive circuits, wherein each of the repair lines is responsive to the at least two A drive circuit fault in one of the drive circuits is coupled to an output of each of the at least two drive circuits associated therewith.
  • the plurality of driving circuits are arranged in an array, and each row of driving circuits is controlled by one gate line, and each of the repair lines is configured to be associated with two adjacent driving circuits of the same row, and an initial state Disconnecting from an output of at least one of the two adjacent drive circuits, and wherein each of the repair lines is responsive to one of the adjacent two drive circuits Connected to the outputs of the two adjacent drive circuits.
  • the plurality of driving circuits are arranged in an array, and each row of driving circuits is controlled by one gate line, and any two driving circuits in each row of driving circuits are grouped into one group, and each of the repairing line configurations is configured.
  • each of the repair lines is responsive to the set of drive circuits A drive circuit fault is coupled to the output of the set of drive circuits.
  • the plurality of driving circuits are arranged in an array, and each row of driving circuits is controlled by one gate line, and one driving circuit of each row of driving circuits is configured as a dedicated repair driving circuit, and each of the repair lines is configured as Associated with the dedicated repair drive circuit and at least one other drive circuit with the dedicated repair drive circuit, and in an initial state with at least one of the dedicated repair drive circuit and the at least one other drive circuit The output terminals are disconnected, and wherein each of the repair lines is connectable to an output of the dedicated repair drive circuit and the fault drive circuit in response to any one of the at least one other drive circuit failure.
  • the plurality of driving circuits are arranged in an array, each row of driving circuits is controlled by a gate line, and driving circuits associated with each of the repair lines are located in the same row and associated with each of the repair lines
  • the display elements in the sub-pixels driven by the driving circuit display the same color.
  • each of the repair lines is disconnected from the output end of at least one of the driving circuits associated with the driving circuit, and wherein each The repair line is responsive to any of the drive circuit faults associated with each of the repair lines to be coupled to the output of the drive circuit and the fault drive circuit that are functioning properly in the associated drive circuit.
  • each of the driving circuits is configured to drive display elements in n sub-pixels for display, and an output of each of the driving circuits and a display element in each of the sub-pixels driven thereof have a switching element
  • the branches are connected, and n is an integer greater than or equal to 2.
  • each of the drive circuits is respectively connected to a display element of the n sub-pixels that it drives by n branches each having a switching element, each of the n branches
  • the switching elements of the branch are controlled by separate control lines.
  • the plurality of driving circuits are arranged in an array, and each row of driving circuits is controlled by one gate line, and switching elements in the branches connected to the output ends of the same row of driving circuits can share n control lines, each Each of the n switching branches connected to the output of the driving circuit is controlled by one of the n control lines.
  • the switching element is a switching transistor, a first pole of the switching transistor is connected to an output end of the driving circuit, and a second pole of the switching transistor is connected to a sub-pixel driven by the driving circuit a display element, the gate of the switching transistor being connected to the corresponding control line.
  • the display elements in the sub-pixels driven by the respective driving circuits display the same color distribution.
  • each of the repair lines is insulated from an output of the at least two drive circuits associated therewith by an insulating layer, and a projection of each of the repair lines on the insulating layer is Projections of the associated outputs of the at least two drive circuits on the insulating layer at least partially overlap.
  • each of the drive circuits is associated with a repair line.
  • the display substrate is an organic light emitting diode array substrate
  • the driving circuit includes an organic light emitting diode driving circuit
  • the display element includes an organic light emitting diode
  • a repair method of a display substrate is provided.
  • the display substrate is the display substrate described above, and the repair method of the display substrate includes: finding a faulty driving circuit as a problem driving circuit; a repair line associated with the problem drive circuit as a target repair line, and other drive circuits associated with the target repair line that are normally operated except the problem drive circuit are used as target drive circuits; a connection between the circuit and its output; and connecting the target repair line to an output of the problem drive circuit and an output of the target drive circuit, respectively, such that the target drive circuit is driven by the problem
  • the display elements in the sub-pixels driven by the driving circuit are displayed.
  • cutting off the connection between the problem drive circuit and its output includes cutting off the connection between the problem drive circuit and its output by laser cutting.
  • connecting the target repair line to the output end of the problem driving circuit and the output end of the target driving circuit respectively includes: driving the target repair line and the problem by laser short circuit respectively An output of the circuit is coupled to an output of the target drive circuit.
  • a display device including the above display substrate is provided.
  • FIG. 1 is a partial structural schematic view of a display substrate in accordance with an embodiment of the present disclosure
  • FIG. 2 is a schematic diagram of a process of repairing a display substrate according to an embodiment of the present disclosure
  • FIG. 3 is a partial circuit schematic diagram of a display substrate in accordance with an embodiment of the present disclosure.
  • FIG. 4 is a partial cross-sectional view of a display substrate in accordance with an embodiment of the present disclosure
  • FIG. 5 is a flow chart of a repair method of a display substrate according to an embodiment of the present disclosure.
  • a pixel circuit multiplexing manner may be adopted, that is, each pixel circuit is respectively connected to display elements in a plurality of sub-pixels through a plurality of branches, and each of the branches is provided with a switching element, The switching elements on the strips are turned on in turn, so that the pixel circuit can drive the display elements in each sub-pixel in turn, which can reduce the number of pixel circuits in the display substrate and the area occupied by the display substrate, and improve the resolution of the display substrate.
  • the structure of the multiplexed pixel circuit is more complicated, and it is more prone to short circuit, open circuit, etc., and when a pixel circuit fails and cannot work normally, the display elements in the plurality of sub-pixels connected thereto cannot be normally displayed. This will seriously affect the display.
  • the technical solution of the present disclosure is applicable to both the manner in which the pixel circuits are not multiplexed, and the manner in which the pixel circuits are multiplexed.
  • the drawings of the present disclosure show only the manner in which pixel circuits are multiplexed, one of ordinary skill in the art can obtain pixel circuits that are not multiplexed by causing each pixel circuit to drive only display elements in one sub-pixel for display. The way of this will not be repeated here.
  • an embodiment of the present disclosure provides a display substrate including a plurality of driving circuits 1 configured to drive display elements 2 in each sub-pixel for display, each driving circuit 1 configured To drive display of the display elements 2 in at least one of the sub-pixels, the output 11 of each drive circuit 1 is connected to the display element 2 of said at least one sub-pixel driven by a branch 31 having a switching element 3.
  • the display element 2 is a portion of the sub-pixel that is actually displayed.
  • the drive circuit 1 is configured to supply a drive signal (such as current, voltage, etc.) to the display element 2 to control the display element 2 to display, so that the drive circuit 1 corresponds to the pixel circuit of each sub-pixel.
  • the output end 11 of each of the drive circuits 1 can be connected to the display elements 2 of the plurality of sub-pixels via a plurality of branches 31, and each of the branches 31 can be provided with a switching element 3.
  • the display substrate of the embodiment of the present disclosure may adopt a manner in which pixel circuits are multiplexed, so that each pixel circuit may alternately control display elements of the plurality of sub-pixels for display.
  • the output end 11 of each driving circuit 1 can also be connected to the display element 2 in one sub-pixel through only one branch 31, that is, the display substrate of the embodiment of the present disclosure can also be used without the pixel circuit.
  • the switching element 3 may not be provided on the branch 31.
  • the drive circuit 1 is connected to the display element 2 via the branch 31, the display element 2 can be controlled to perform display.
  • the drive circuit 1 is usually only configured to drive the display element 2 in the vicinity thereof for display.
  • the display substrate of the embodiment of the present disclosure may be an organic light emitting diode array substrate.
  • the driving circuit 1 may include an organic light emitting diode driving circuit
  • the display element 2 may include an organic light emitting diode (OLED). .
  • the organic light emitting diode driving circuit shown in FIG. 3 may be a driving circuit with a threshold compensation function (for example, may include a plurality of transistors, ports, capacitors, etc.), or may be other known driving circuits (for example, 2T1C).
  • the driving circuit since the specific form of the available organic light emitting diode driving circuit is diverse, it will not be described in detail herein.
  • the form of the display substrate of the embodiment of the present disclosure is not limited to the organic light emitting diode array substrate.
  • the display substrate of the embodiment of the present disclosure may also be an array substrate of liquid crystal display.
  • the display element 2 may include a pixel electrode (also The driving circuit 1 may be a pixel electrode driving circuit, and details are not described herein again.
  • the display substrate of the embodiment of the present disclosure further includes at least one repair line 5, each of which is configured to be associated with at least two drive circuits 1 and in an initial state and at least one of the at least two drive circuits 1
  • the output 11 of the circuit 1 is open, wherein each repair line 5 is capable of responding to each of the at least two drive circuits 1 associated with one of the at least two drive circuits 1 in association with the drive circuit 1
  • the output terminal 11 of the drive circuit 1 is connected.
  • each repair line 5 is associated with any two adjacent drive circuits 1, but the repair line 5 and at least one of the two drive circuits 1 are driven.
  • the output end 11 of the circuit 1 is insulated (or disconnected), so in the normal operation, the repair line 5 does not turn on the output end 11 of the two driving circuits 1 associated therewith, and thus does not affect the normal display of the display substrate. .
  • the repair line 5 can be connected to the output terminals 11 of the two drive circuits 1 associated therewith, that is, the repair line 5 can be
  • the output 11 of the faulty drive circuit 1 is electrically connected to the output 11 of the other normally operating drive circuit 1, such that the drive signal output from the output 11 of the other normally operating drive circuit 1 can be transmitted via the repair line 5.
  • the display element 2 in the sub-pixel originally driven by the failed drive circuit 1 (of course, the display element 2 in the sub-pixel originally connected to the output terminal 11 of the normal drive circuit 1 can still be driven by the normal drive circuit 1
  • the display element 2 in the sub-pixel originally driven by the failed driving circuit 1 can still be displayed, thereby reducing the influence of the failure of the driving circuit 1 on the display and improving the product yield.
  • the connection between the failed driving circuit 1 and its output can be broken, Thereby the faulty drive circuit 1 is disconnected from the display element 2 in its associated sub-pixel.
  • the display substrate of the embodiment of the present disclosure can reduce the influence of the partial drive circuit 1 failure on the display by adding the repair line 5, which has a small change to the existing product structure, is simple to implement, and has low cost.
  • each of the driving circuits 1 may malfunction, in some embodiments, each of the driving circuits 1 may be associated with one repairing line 5 to ensure that when any of the driving circuits 1 fails, it is originally driven by the failed driving circuit 1.
  • the display elements 2 in the sub-pixels can be displayed by being driven by the other normal drive circuit 1 via the repair line 5.
  • the plurality of driving circuits 1 included in the display substrate of the embodiment of the present disclosure may be grouped, for example, each group may include two driving circuits 1, and each of the repair lines 5 may be configured as a group
  • the drive circuit 1 is associated, and in the normal operation, the repair line 5 is disconnected (or insulated) from the output of at least one of the set of drive circuits 1, one of the set of drive circuits 1.
  • the repair line 5 associated with the set of drive circuits 1 can conduct the output 11 of the failed drive circuit 1 to the output 11 of another normally operating drive circuit 1, such that another normal
  • the driving signal outputted from the output terminal 11 of the operating drive circuit 1 can be transmitted via the repair line 5 to the display element 2 in the sub-pixel originally driven by the failed driving circuit 1, so that the sub-pixel originally driven by the failed driving circuit 1 is in the sub-pixel
  • the display element 2 can still be displayed, thereby reducing the influence of the failure of the driving circuit 1 on the display and improving the yield of the product.
  • the plurality of driving circuits 1 included in the display substrate of the embodiment of the present disclosure may include dedicated repair driving circuits, for example, each of the repair lines 5 may be configured to be associated with the dedicated repair driving circuit and At least one other drive circuit 1 is associated, and in normal operation, the repair line 5 is disconnected (or insulated) from the output of at least one of the dedicated repair drive circuit and at least one other drive circuit 1 associated with it
  • the repair line 5 associated with the failed driving circuit 1 can cause the output end 11 of the failed driving circuit 1 to The output end of the dedicated repair drive circuit is turned on, so that the drive signal outputted from the output end of the dedicated repair drive circuit can be transmitted via the repair line 5 to the display element 2 in the sub-pixel originally driven by the faulty drive circuit 1.
  • the display element 2 in the sub-pixel originally driven by the failed driving circuit 1 can still be displayed, thereby reducing the influence of the failure of the driving circuit 1 on the display, High product yield.
  • an insulating layer 4 is disposed between each repair line 5 and the output end 11 of the drive circuit 1 associated therewith, and each repair line 5 is on the insulating layer 4.
  • the projection of the output 11 of the drive circuit 1 associated with it on the insulating layer 4 at least partially overlaps.
  • each repair line 5 can be disposed at a different layer from the output end 11 of the drive circuit 1 associated therewith, and an insulating layer 4 can be disposed therebetween, and the projection of each repair line 5 on the insulating layer 4
  • the projections of the output 11 of the associated drive circuit 1 on the insulating layer 4 at least partially overlap, if the insulating layer 4 has been produced at the intersection of the projection of the repair line 5 and the projection of the output 11 of the drive circuit 1
  • the hole, through which the repair wire 5 can be connected to the output end 11 of the drive circuit 1 can be connected via the via (and the conductor in the via).
  • the insulating layer 4 may generate via holes at its respective positions in response to the irradiation of the laser light thereto, while the laser light may illuminate the repair line 5 at the corresponding position to melt it, the material of the molten repair line 5 The corresponding vias are flowed in such that the repair line 5 is electrically connected to the output 11 of the corresponding drive circuit 1.
  • each repair line 5 can also be disconnected or connected by the switching element to the output 11 of the associated drive circuit 1 in which case, in which case a corresponding control circuit can also be provided to control the disconnection of the switching element. And closing, thereby controlling the disconnection or connection between each repair line 5 and the output end 11 of the drive circuit 1 associated therewith, which will not be described herein.
  • each repair line 5 is associated with two drive circuits 1 and each repair line 5 is connected to the output 11 of one of its associated drive circuits 1 and to the other drive circuit 1 associated therewith.
  • the output 11 is disconnected (or insulated).
  • the repairing line 5 has been connected to the output end 11 of one of the two driving circuits 1 associated with it, in repair When any one of the two drive circuits 1 associated with the line 5 fails, the repair line 5 can be connected to the output end 11 of the other drive circuit 1 of the two drive circuits 1 associated therewith. Can reduce the amount of work required.
  • the plurality of driving circuits 1 included in the display substrate of the embodiment of the present disclosure are arranged in an array, and each row of the driving circuit 1 is connected to one gate line 91, and each column of the driving circuit 1 is connected to one data line 92. At least two drive circuits 1 associated with each repair line 5 are located on the same line.
  • each row of driving circuit 1 can drive display elements 2 in the same row of sub-pixels for display, and each column of driving circuit 1 can drive display elements in the same column of sub-pixels for display.
  • each of the driving circuits 1 corresponds to a pixel circuit in one sub-pixel, the driving circuit 1 can be controlled in a manner of controlling sub-pixels. As shown in FIG. 1 to FIG. 3, a plurality of driving circuits 1 may be arranged in an array, and each row of driving circuits 1 is connected to one gate line 91. Therefore, the driving circuits 1 of the same row (ie, connected to the same gate line 91) are connected.
  • each repair line 5 is associated with two adjacent drive units 1 in the same row.
  • the display contents of the display elements 2 in the sub-pixels driven by the different driving circuits 1 are generally different.
  • the display elements 2 in the sub-pixels originally driven by the faulty driving circuit 1 are When the other driving circuits 1 of the same row of the fault driving circuit 1 are driven to perform display, the display contents of the display elements 2 in the respective sub-pixels driven by the different driving circuits 1 are the same, and there is display deviation, but the adjacent sub-pixels
  • the display contents of the display elements 2 of the pixels are generally not much different, and the driving circuits 1 that drive the display elements 2 of the adjacent sub-pixels to display are also generally adjacent, and therefore, when any of the driving circuits 1 fails, the driving circuit is originally driven by a fault.
  • the display element 2 in the 1-driven sub-pixel can be displayed by being driven by the drive circuit 1 adjacent to the same line as the faulty drive circuit 1, so that the influence on the display effect is small, even to the extent that the naked eye cannot distinguish.
  • each of the driving circuits 1 is configurable to drive display elements 2 of the n sub-pixels for display, and the output terminal 11 of each of the driving circuits 1 and the display elements 2 of each of the sub-pixels driven thereof have a switch
  • the branches 31 of the element 3 are connected, and n is an integer greater than or equal to two.
  • the display elements 2 of the sub-pixels driven by the driving circuit 1 associated with each repair line 5 display the same color
  • each of the driving circuits 1 is configured to drive the display elements 1 of the plurality of sub-pixels for display.
  • the display elements 2 of the sub-pixels driven by the respective drive circuits 1 have the same color distribution.
  • each repair line 5 is associated with two drive circuits 1
  • the colors displayed by the display elements 2 in the sub-pixels driven by the two drive circuits 1 have the same color distribution (eg, each The display elements 2 in the sub-pixels driven by the drive circuit 1 sequentially display red R, blue B, and green G).
  • the driving unit 1 simultaneously drives the display elements 2 of the two sub-pixels to display the same color, which can be reduced.
  • the effect on the display effect is even to the extent that the naked eye cannot distinguish.
  • each of the driving circuits 1 is configured to drive the display elements 2 of the n sub-pixels for display
  • Each of the drive circuits 1 can be respectively connected to the display elements 2 of the n sub-pixels driven by the n branches 31 each having the switching elements 3, and the switches of each of the n branches 31
  • the element 3 is controlled by a separate control line, and for example, all of the switching elements 3 in the branch 31 to which the output 11 of the same row of driving circuits 1 are connected may share n control lines 39, the output 11 of each driving circuit 1
  • Each of the switching elements 3 of the connected n branches 31 is controlled by one of the n control lines 39.
  • each of the switching elements 3 of the n branches 31 to which the output terminal 11 of each driving circuit 1 is connected is one of the n control lines 39.
  • Control, and each control line 39 is connected to one of the switching elements 3 of the n branches 31 connected to each drive unit 1 in the same row.
  • each of the control lines 39 when any one of the control lines 39 is turned on (even if the switching element 3 is turned on), the output of each of the driving circuits 1 of the corresponding row is controlled by the control line 39.
  • the branch circuit 31 in which the component 3 is located is electrically connected to the display element 2 of the corresponding one of the sub-pixels, thereby driving the display element 2, and by turning on the conduction signal to each control line 39 in turn, each drive circuit 1 can be passed through.
  • Each branch 31 connected to the output terminal is electrically connected to each display element 2 of the corresponding sub-pixel, thereby driving each display element 2 in turn for display.
  • the switching element 3 in the embodiment of the present disclosure may be a switching transistor T, the first pole of which may be connected to the output end 11 of the driving circuit 1, and the second pole may be connected to the sub-pixel.
  • Display element 2 the gate can be connected to control line 39.
  • the switching element 3 in the embodiment of the present disclosure is not limited to the form of the switching transistor T, and other types of switching elements may be used as the switching element 3, and details are not described herein again.
  • the output end 11 of each of the driving circuits 1 can also be respectively connected to the display elements 2 of the plurality of sub-pixels through a single-pole multi-throw switch. , will not repeat them here.
  • An embodiment of the present disclosure further provides a repair method of a display substrate.
  • the repair method may include the following steps S01 to S04.
  • step S01 the drive circuit 1 for which the display element 2 of the sub-pixel cannot be driven is searched is searched for as the problem drive circuit 18.
  • step S02 the repair line 5 associated with the problem drive circuit 18 is selected as the target repair line 59, and other drive circuits 1 other than the problem drive circuit 18 associated with the target repair line 59 are normally used as the target drive circuit 19. .
  • step S03 the connection between the problem driving circuit 18 and its output terminal 11 is cut off.
  • step S04 the target repair line 59 is connected to the output terminal 11 of the question driving circuit 18 and the output terminal 11 of the target driving circuit 19, respectively, so that the target driving circuit 19 and the sub-pixels originally driven by the problem driving circuit 18 are The display element 2 is connected.
  • step S01 by detecting, it is determined that there is a drive circuit 1 (ie, the problem drive circuit 18) that is unable to drive the display elements of the corresponding sub-pixels.
  • step S03 as shown in Fig. 5, the connection between the problem driving circuit 18 and its output terminal 11 is cut so as not to affect the display element 2 of the corresponding sub-pixel.
  • step S04 the output terminal 11 of the other drive circuit 1 (target drive circuit 19) is connected to the output terminal 11 of the problem drive circuit 18 through the repair line 5 (target repair line 59), thereby making the target drive circuit 19 usable.
  • the display element 2 of the sub-pixel originally driven by the problem driving circuit 18 is driven to display, thereby reducing the influence of the faulty driving circuit on the display effect.
  • step S03 the connection between the cut-off problem driving circuit 18 and its output terminal 11 is actually a connection between the output terminal 11 of the problem driving circuit 18 and the display element 2 of the sub-pixel it drives, for example, As shown in FIG. 2, the connection between the output terminal 11 of the problem driving circuit 18 and the display element 2 of the sub-pixel to be driven is cut off at the point N1, and then the target repair line 59 and the problem driving circuit are respectively made in step S04.
  • the N2 point of the output terminal 11 of 18 is connected to the N3 point of the output terminal 11 of the target drive circuit 19, so that after step S04, the display element 2 of the sub-pixel originally driven by the problem drive circuit 18 is only connected to the target drive circuit 19 Connected and driven by it.
  • each repair line 5 may be originally associated with the output 11 of its two drive circuits 1 (e.g., the output of the drive circuit 18 and The output terminal of the driving circuit 19 is insulated or may be insulated from only the output terminal 11 of one of the driving circuits (for example, the output terminal of the driving circuit 19). Therefore, in step S04, the target repairing line 59 and the problem driving circuit are respectively caused.
  • the output terminal 11 of the 18 and the output terminal 11 of the target drive circuit 19 are connected such that the repair line 5 is connected to the output terminal 11 of the drive circuit 1 which is originally insulated therefrom, for example, the point N2 in Fig. 2 is originally connected, and A new connection is formed at point N3 in step S04.
  • the drive circuit 19 can be connected to the display element 2 of the sub-pixel originally driven by the problem drive circuit 18.
  • disconnecting the problem drive circuit 18 from its output 11 in step S03 includes cutting off the connection between the problem drive circuit 18 and its output 11 by laser cutting.
  • connecting the target repair line 59 to the output end 11 of the problem driving circuit 18 and the output end 11 of the target driving circuit 19 respectively in step S04 includes: respectively, the target repairing line 59 and the problem driving circuit are respectively performed by laser short circuit.
  • the output of 18 is connected to the output of target drive circuit 19.
  • the cutting in step S03 may be performed by a laser, such as cutting with a laser tangential device, that is, the connection between the problem driving circuit 18 and its output end 11 is blown by a laser; in step S04
  • the connection may also be performed by a laser, such as laser shorting with a laser tangential device, that is, laser beaming the projection overlap of the target repair line 59 and the output end 11 of the drive circuit 1 at the target repair line 59 and A via hole is formed at a corresponding position of the insulating layer between the output terminals 11 of the driving circuit 1, and for example, a corresponding portion of the repairing line 59 is melted and flows into the formed via hole, thereby bringing the target repairing line 59 and the output terminal 11 therebetween. Turn on.
  • the embodiment of the present disclosure is not limited to cutting by laser cutting, for example, cutting by other means such as mechanical cutting, and the output of the repairing wire 5 and the driving circuit 1 may be performed by other methods such as tungsten powder deposition.
  • the terminals 11 are turned on, and will not be described here.
  • the output ends of the driving circuits each include a conductor material.
  • Embodiments of the present disclosure also provide a display device including the above display substrate.
  • the display substrate of the embodiment of the present disclosure may be combined with other components to form a completed display device, which may be an electronic paper, a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, and a navigation device. Any product or part that has a display function, such as an instrument.

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Abstract

一种显示基板及其修复方法、显示装置，该显示基板包括配置为驱动各子像素中的显示元件（2）进行显示的多个驱动电路（1），每个所述驱动电路（1）配置为驱动至少一个子像素中的显示元件（2）进行显示，每个所述驱动电路（1）的输出端（11）与其驱动的所述至少一个子像素中的显示元件（2）通过具有开关元件（3）的支路（31）连接，所述显示基板还包括：至少一条修复线（5），每条所述修复线（5）配置为与至少两个驱动电路（1）关联，且初始状态下与所述至少两个驱动电路（1）中的至少一个驱动电路（1）的输出端（11）断开，其中，每条所述修复线（5）能够响应于所述至少两个驱动电路（1）中的一个驱动电路（1）故障与其所关联的所述至少两个驱动电路（1）中的每个驱动电路（1）的输出端（11）连接。

Description

显示基板及其修复方法、显示装置
相关申请的交叉引用
本申请要求于2018年5月17日在中国知识产权局提交的申请号为201810475463.1、名称为“显示基板及其修复方法、显示装置”的中国专利申请的优先权，该中国专利申请的全部公开内容通过引用合并于此。
技术领域
本公开属于像素电路技术领域，具体涉及显示基板及其修复方法、显示装置。
背景技术
在显示基板中，每个子像素均设置有对应的驱动电路(也称为像素电路)，以驱动子像素中的显示元件进行显示。
由于像素电路的结构比较复杂，故容易出现短路、断路等故障，且一旦像素电路出现故障而无法正常工作时，则与其连接的子像素中的显示元件就无法进行正常显示，会影响显示效果。
发明内容
根据本公开的一方面，提供一种显示基板，包括配置为驱动各子像素中的显示元件进行显示的多个驱动电路，每个所述驱动电路配置为驱动至少一个子像素中的显示元件进行显示，每个所述驱动电路的输出端与其驱动的所述至少一个子像素中的显示元件通过具有开关元件的支路连接，所述显示基板还包括：至少一条修复线，每条所述修复线配置为与至少两个驱动电路关联，且初始状态下与所述至少两个驱动电路中的至少一个驱动电路的输出端断开，其中，每条所述修复线能够响应于所述至少两个驱动电路中的一个驱动电路故障与 其所关联的所述至少两个驱动电路中的每个驱动电路的输出端连接。
在一些实施方式中，所述多个驱动电路排成阵列，每行驱动电路通过一条栅线控制，每条所述修复线配置为与同一行的相邻的两个驱动电路关联，且初始状态下与所述相邻的两个驱动电路中的至少一个驱动电路的输出端断开，以及其中，每条所述修复线能够响应于所述相邻的两个驱动电路中的一个驱动电路故障与所述相邻的两个驱动电路的输出端均连接。
在一些实施方式中，所述多个驱动电路排成阵列，每行驱动电路通过一条栅线控制，每行驱动电路中的任意两个驱动电路为一组进行分组，每条所述修复线配置为与一组驱动电路关联，且初始状态下与所述一组驱动电路中的至少一个驱动电路的输出端断开，以及其中，每条所述修复线能够响应于所述一组驱动电路中的一个驱动电路故障与所述一组驱动电路的输出端均连接。
在一些实施方式中，所述多个驱动电路排成阵列，每行驱动电路通过一条栅线控制，每行驱动电路中的一个驱动电路配置为专用修复驱动电路，每条所述修复线配置为与所述专用修复驱动电路及与所述专用修复驱动电路同行的至少一个其他的驱动电路关联，且初始状态下与所述专用修复驱动电路及所述至少一个其他的驱动电路中的至少一者的输出端断开，以及其中，每条所述修复线能够响应于所述至少一个其他的驱动电路中的任意驱动电路故障与所述专用修复驱动电路及故障驱动电路的输出端均连接。
在一些实施方式中，所述多个驱动电路排成阵列，每行驱动电路通过一条栅线控制，与每条所述修复线关联的驱动电路位于同一行，且与每条所述修复线关联的驱动电路所驱动的子像素中的显示元件显示相同的颜色，初始状态下，每条所述修复线与其所关联的驱动电路中的至少一个驱动电路的输出端断开，以及其中，每条所述修复线能够响应于与每条所述修复线关联的驱动电路中的任意驱动电路故障与其所关联的驱动电路中正常工作的驱动电路及故障驱动电路的输出端均连接。
在一些实施方式中，每个所述驱动电路配置为驱动n个子像素 中的显示元件进行显示，每个所述驱动电路的输出端与其所驱动的每个子像素中的显示元件通过具有开关元件的支路连接，n为大于或等于2的整数。
在一些实施方式中，每个所述驱动电路的输出端通过各自具有开关元件的n条支路分别连接至其所驱动的n个子像素中的显示元件，所述n条支路中的每条支路的开关元件由单独的控制线控制。
在一些实施方式中，所述多个驱动电路排成阵列，每行驱动电路通过一条栅线控制，同一行驱动电路的输出端所连接的支路中的开关元件可共享n条控制线，每个驱动电路的输出端所连接的n条支路中的开关元件中的每一个由该n条控制线中的一条控制。
在一些实施方式中，所述开关元件为开关晶体管，所述开关晶体管的第一极连接所述驱动电路的输出端，所述开关晶体管的第二极连接所述驱动电路所驱动的子像素中的显示元件，所述开关晶体管的栅极连接相应的所述控制线。
在一些实施方式中，与每条所述修复线关联的所述至少两个驱动电路中，各驱动电路所驱动的子像素中的显示元件所显示的颜色分布相同。
在一些实施方式中，每条所述修复线与其所关联的所述至少两个驱动电路的输出端之间通过绝缘层绝缘，且每条所述修复线在所述绝缘层上的投影与其所关联的所述至少两个驱动电路的输出端在所述绝缘层上的投影至少部分重叠。
在一些实施方式中，每个所述驱动电路均与一条修复线关联。
在一些实施方式中，所述显示基板为有机发光二极管阵列基板，所述驱动电路包括有机发光二极管驱动电路，所述显示元件包括有机发光二极管。
根据本公开的另一方面，提供一种显示基板的修复方法，所述显示基板为上述的显示基板，所述显示基板的修复方法包括：查找故障的驱动电路，将其作为问题驱动电路；选择与所述问题驱动电路关联的修复线作为目标修复线，并将与所述目标修复线关联的除所述问题驱动电路之外的正常工作的其它驱动电路作为目标驱动电路；切断 所述问题驱动电路与其输出端之间的连接；以及使所述目标修复线分别与所述问题驱动电路的输出端和所述目标驱动电路的输出端连接，以使所述目标驱动电路驱动原本由所述问题驱动电路所驱动的子像素中的显示元件进行显示。
在一些实施方式中，切断所述问题驱动电路与其输出端之间的连接包括：通过激光切割方式切断所述问题驱动电路与其输出端之间的连接。
在一些实施方式中，使所述目标修复线分别与所述问题驱动电路的输出端和所述目标驱动电路的输出端连接包括：通过激光短路方式使所述目标修复线分别与所述问题驱动电路的输出端和所述目标驱动电路的输出端连接。
根据本公开的再一方面，提供一种显示装置，包括上述的显示基板。
附图说明
图1为根据本公开的实施例的显示基板的局部结构示意图；
图2为对根据本公开的实施例的显示基板进行修复的过程的示意图；
图3为根据本公开的实施例的显示基板的局部电路结构示意图；
图4为根据本公开的实施例的显示基板的局部剖视图；以及
图5为根据本公开的实施例的显示基板的修复方法流程图。
具体实施方式
为使本领域技术人员更好地理解本公开的技术方案，下面结合附图和具体实施例对本公开的技术方案作进一步详细描述。
本公开的实施例中，可采用像素电路复用的方式，即让每个像素电路通过多条支路与多个子像素中的显示元件分别相连，每条支路上设有开关元件，通过使各条支路上的开关元件轮流闭合，即可使像素电路轮流驱动各子像素中的显示元件，这可减少显示基板中像素电路的数量及其占据的面积，提高显示基板的分辨率。
然而，被复用的像素电路的结构更为复杂，更容易出现短路、断路等故障，且一个像素电路出现故障而无法正常工作时，与其连接的多个子像素中的显示元件都无法进行正常显示，这会严重影响显示效果。
本公开的技术方案既适用于像素电路不被复用的方式，也适用于像素电路复用的方式。虽然本公开的附图仅示出了像素电路复用的方式，然而，本领域普通技术人员可以通过使每个像素电路仅驱动一个子像素中的显示元件进行显示来获得像素电路不被复用的方式，在此不再赘述。
如图1至图3所示，本公开的实施例提供一种显示基板，该显示基板包括配置为驱动各子像素中的显示元件2进行显示的多个驱动电路1，每个驱动电路1配置为驱动至少一个子像素中的显示元件2进行显示，每个驱动电路1的输出端11与其驱动的所述至少一个子像素中的显示元件2通过具有开关元件3的支路31连接。
在本公开的实施例的显示基板中，显示元件2是子像素中实际进行显示的部分。驱动电路1配置为向显示元件2提供驱动信号(如电流、电压等)，以控制显示元件2进行显示，故驱动电路1相当于各子像素的像素电路。而且，每个驱动电路1的输出端11可通过多条支路31分别与多个子像素中的显示元件2相连，每条支路31上均可设有开关元件3。由此，通过控制各开关元件3的导通或关断，即可决定驱动电路1与哪个显示元件2连接并对其进行驱动。也就是说，本公开的实施例的显示基板可采用像素电路复用的方式，从而每个像素电路可轮流控制多个子像素中的显示元件进行显示。需注意的是，每个驱动电路1的输出端11也可以仅通过一条支路31与一个子像素中的显示元件2相连，即本公开的实施例的显示基板也可采用像素电路不被复用的方式，即每个像素电路仅控制一个子像素中的显示元件进行显示，该情况下，支路31上可不设置开关元件3。
从理论上说，只要驱动电路1通过支路31与显示元件2连接，就可控制显示元件2进行显示。但是，为了缩短引线、合理布图等，驱动电路1通常仅配置为驱动其附近的显示元件2进行显示。
在一些实施方式中，本公开的实施例的显示基板可以为有机发光二极管阵列基板，如图3所示，驱动电路1可包括有机发光二极管驱动电路，显示元件2可包括有机发光二极管(OLED)。
应当理解，图3所示的有机发光二极管驱动电路可为具有阈值补偿功能的驱动电路(例如，可包括多个晶体管、端口、电容等)，也可以是已知的其它驱动电路(例如，2T1C的驱动电路)，由于可用的有机发光二极管驱动电路的具体形式是多样的，故在此不再详细描述。
本公开的实施例的显示基板的形式并不限于有机发光二极管阵列基板，例如本公开的实施例的显示基板也可为液晶显示的阵列基板，该情况下，显示元件2可包括像素电极(还可包括公共电极)，而驱动电路1则可为像素电极驱动电路，在此不再赘述。
本公开的实施例的显示基板还包括至少一条修复线5，每条修复线5配置为与至少两个驱动电路1关联，且初始状态下与所述至少两个驱动电路1中的至少一个驱动电路1的输出端11断开，其中，每条修复线5能够响应于所述至少两个驱动电路1中的一个驱动电路1故障与其所关联的所述至少两个驱动电路1中的每个驱动电路1的输出端11连接。
例如，在一些实施方式中，如图1-3所示，每条修复线5与任意相邻的两个驱动电路1关联，但是该修复线5与这两个驱动电路1中的至少一个驱动电路1的输出端11绝缘(或断开)，故正常工作情况下，该修复线5不会将与其关联的两个驱动电路1的输出端11导通，因此不会影响显示基板的正常显示。
在与任意修复线5关联的两个驱动电路1中的一个驱动电路1发生故障时，该修复线5可与其关联的两个驱动电路1的输出端11均连接，即，该修复线5可将故障的驱动电路1的输出端11与另一正常工作的驱动电路1的输出端11导通，这样，另一正常工作的驱动电路1的输出端11输出的驱动信号可经修复线5传递到原本由故障的驱动电路1驱动的子像素中的显示元件2(当然，原本与该正常的驱动电路1的输出端11连接的子像素中的显示元件2仍可由该正 常的驱动电路1驱动)，使原本由故障的驱动电路1驱动的子像素中的显示元件2仍能进行显示，从而减小驱动电路1的故障对显示造成的影响，提高产品良率。
在一些实施方式中，为了防止故障的驱动电路1对与其关联的子像素中的显示元件2的影响，如图2所示，可使故障的驱动电路1与其输出端之间的连接断开，从而使故障的驱动电路1与其所关联的子像素中的显示元件2断开连接。
本公开的实施例的显示基板通过增加修复线5可减小部分驱动电路1故障对显示的影响，其对现有产品结构的改变较小，简单易实现，成本较低。
由于每个驱动电路1均可能发生故障，在一些实施方式中，每个驱动电路1可均与一条修复线5关联，以保证任意驱动电路1发生故障时，原本由故障的驱动电路1驱动的子像素中的显示元件2均可由其他正常的驱动电路1经由修复线5驱动而进行显示。
在一些实施方式中，本公开的实施例的显示基板所包括的多个驱动电路1可分组，例如，每组可包括两个驱动电路1，每条所述修复线5可配置为与一组驱动电路1关联，且正常工作情况下，所述修复线5与所述一组驱动电路1中的至少一个驱动电路1的输出端断开(或绝缘)，在一组驱动电路1中的一个驱动电路1发生故障时，与该组驱动电路1关联的修复线5可将故障的驱动电路1的输出端11与另一正常工作的驱动电路1的输出端11导通，这样，另一正常工作的驱动电路1的输出端11输出的驱动信号可经修复线5传递到原本由故障的驱动电路1驱动的子像素中的显示元件2，使原本由故障的驱动电路1驱动的子像素中的显示元件2仍能进行显示，从而减小驱动电路1的故障对显示造成的影响，提高产品良率。
在一些是实施方式中，本公开的实施例的显示基板所包括的多个驱动电路1可包括专用修复驱动电路，例如，每条所述修复线5可配置为与所述专用修复驱动电路和至少一个其他驱动电路1关联，且正常工作情况下，所述修复线5与其所关联的所述专用修复驱动电路和至少一个其他驱动电路1中的至少一者的输出端断开(或绝缘)， 与任意修复线5关联的所述至少一个其他驱动电路1中的一个驱动电路1发生故障时，与故障的驱动电路1关联的修复线5可将故障的驱动电路1的输出端11与所述专用修复驱动电路的输出端导通，这样，所述专用修复驱动电路的输出端输出的驱动信号可经修复线5传递到原本由故障的驱动电路1驱动的子像素中的显示元件2，使原本由故障的驱动电路1驱动的子像素中的显示元件2仍能进行显示，从而减小驱动电路1的故障对显示造成的影响，提高产品良率。
在一些实施方式中，如图4所示，每条修复线5与其所关联的驱动电路1的输出端11之间设有绝缘层4，且每条修复线5在所述绝缘层4上的投影与其所关联的驱动电路1的输出端11在所述绝缘层4上的投影至少部分交叠。
也就是说，每条修复线5可与其所关联驱动电路1的输出端11设于不同层、且之间可设有绝缘层4，每条修复线5在所述绝缘层4上的投影与其所关联的驱动电路1的输出端11在所述绝缘层4上的投影至少部分交叠，若绝缘层4在修复线5的投影与驱动电路1的输出端11的投影的交叠处产生过孔，则修复线5可通过该过孔(及过孔中的导体)连接至驱动电路1的输出端11。例如，所述绝缘层4可响应于激光对其的照射而在其相应位置处产生过孔，同时，激光可照射相应位置处的修复线5以使其熔融，被熔融的修复线5的材料流入相应的过孔，从而使得修复线5与相应的驱动电路1的输出端11导通。
应当理解，每条修复线5也可通过开关元件与其所关联的驱动电路1的输出端11断开或连接，该情况下，还可设置相应的控制电路，以控制所述开关元件的断开和闭合，从而控制每条修复线5与其所关联的驱动电路1的输出端11之间的断开或连接，在此不再赘述。
在一些实施方式中，每条修复线5与两个驱动电路1关联，且每条修复线5与其所关联的一个驱动电路1的输出端11连接，而与其所关联的另一个驱动电路1的输出端11断开(或绝缘)。
也就是说，在修复线5所关联的两个驱动电路1均正常工作的情况下，修复线5已与其所关联的两个驱动电路1中的一个驱动电路 1的输出端11连接，在修复线5所关联的两个驱动电路1中的任一个驱动电路1发生故障时，只要再使修复线5与其所关联的两个驱动电路1中的另一个驱动电路1的输出端11连接即可，可以降低所需的工作量。
在一些实施方式中，本公开的实施例的显示基板所包括的多个驱动电路1排成阵列，每行驱动电路1与一条栅线91连接，每列驱动电路1与一条数据线92连接，每条修复线5所关联的至少两个驱动电路1位于同一行。
例如，每行驱动电路1可驱动同一行子像素中的显示元件2进行显示，每列驱动电路1可驱动同一列子像素中的显示元件进行显示。
由于每个驱动电路1相当于一个子像素中的像素电路，故可用控制子像素的方式控制驱动电路1。如图1至图3所示，多个驱动电路1可排成阵列，每行驱动电路1与一条栅线91连接，因此，同一行(即连接至同一条栅线91)的各驱动电路1应当是同时工作(即同时驱动其输出端11所连接的各子像素中的显示元件2进行显示)，因此，当任意驱动电路1发生故障时，原本由故障驱动电路1驱动的子像素中的显示元件2可由与故障驱动电路1同一行的其他驱动电路1驱动来进行显示，这样同一行的驱动电路1所驱动的各子像素中的显示元件2仍然同步进行显示。
在一些实施方式中，每条修复线5与同一行中的两个相邻的驱动单元1关联。
另外，不同的驱动电路1所驱动的子像素中的显示元件2的显示内容一般不同，然而，当任意驱动电路1故障、而原本由故障驱动电路1驱动的子像素中的显示元件2由与故障驱动电路1同一行的其他驱动电路1驱动来进行显示时，会导致不同的驱动电路1所驱动的各子像素中的显示元件2的显示内容相同，存在显示偏差，但是由于相邻的子像素的显示元件2的显示内容通常相差不大，且驱动相邻的子像素的显示元件2进行显示的驱动电路1通常也相邻，因此，当任意驱动电路1故障时，原本由故障驱动电路1驱动的子像素中的显示元件2可由与故障驱动电路1同一行且相邻的驱动电路1驱动来进行 显示，这样对显示效果的影响较小，甚至可达到肉眼无法分辨的程度。
在一些实施方式中，每个驱动电路1可配置为驱动n个子像素中的显示元件2进行显示，每个驱动电路1的输出端11与其所驱动的每个子像素中的显示元件2通过具有开关元件3的支路31连接，n为大于或等于2的整数。
在各驱动电路1驱动的子像素的显示元件2的数量相同的情况下，即使原本由不同的驱动电路1驱动的子像素的显示元件2改变为由同一个驱动电路1驱动，也无需对驱动电路1的驱动方式进行改变。
在一些实施方式中，每条修复线5所关联的驱动电路1所驱动的子像素的显示元件2显示相同的颜色，在每个驱动电路1配置为驱动多个子像素的显示元件1进行显示的情况下，各驱动电路1所驱动的子像素的显示元件2所显示的颜色分布相同。
也就是说，在每条修复线5与两个驱动电路1关联的情况下，这两个驱动电路1所驱动的子像素中的显示元件2所显示的颜色具有相同的颜色分布(如每个驱动电路1所驱动的子像素中的显示元件2均依次显示红色R、蓝色B和绿色G)。这样，即使原本由不同的驱动电路1驱动的子像素的显示元件2改变为由同一个驱动电路1驱动，驱动单元1也是同时驱动两个子像素的显示元件2显示相同的颜色，这样能减小对显示效果造成的影响，甚至达到肉眼无法分辨的程度。
在一些实施方式中，在本公开的实施例的显示基板所包括的多个驱动电路1排成阵列、且每个驱动电路1配置为驱动n个子像素中的显示元件2进行显示的情况下，每个驱动电路1可通过各自具有开关元件3的n条支路31分别连接至其所驱动的n个子像素中的显示元件2，所述n条支路31中的每条支路31的开关元件3由单独的控制线控制，且例如，同一行驱动电路1的输出端11所连接的支路31中的全部开关元件3可共享n条控制线39，每个驱动电路1的输出端11所连接的n条支路31的开关元件3中的每一个均由该n条控制线39中的一条控制。
如图1至图3所示，在各驱动电路1所驱动的子像素的显示元件2的数量相同(例如均为n)的情况下，同一行的驱动电路1的输 出端11所连接的支路31中的全部开关元件3可共享n条控制线39，每个驱动电路1的输出端11所连接n条支路31的开关元件3中的每一个均由该n控制线39中的一条控制，而每条控制线39则连接同一行每个驱动单元1所连接的n条支路31的开关元件3中的一个开关元件3。由此，当任意一条控制线39中通入导通信号(即使开关元件3闭合导通的信号)时，则相应行的每个驱动电路1的输出端均通过该控制线39所控制的开关元件3所在的支路31与相应的一个子像素的显示元件2导通，从而驱动其进行显示，而通过轮流向各控制线39通入导通信号，即可使每个驱动电路1轮流通过其输出端所连接的各支路31与相应子像素的各显示元件2导通，从而轮流驱动各显示元件2进行显示。
在一些实施方式中，如图3所示，本公开的实施例中的开关元件3可为开关晶体管T，其第一极可连接驱动电路1的输出端11，第二极可连接子像素的显示元件2，栅极可连接控制线39。
当然，本公开的实施例中的开关元件3不限于开关晶体管T的形式，也可以采用其它类型的具有开关作用的元件作为开关元件3，此处不再赘述。
另外，在本公开的实施例的显示基板采用像素电路复用的方式的情况下，每个驱动电路1的输出端11也可通过一个单刀多掷开关分别与多个子像素中的显示元件2相连，在此不再赘述。
本公开的实施例还提供一种显示基板的修复方法，参照图2和图5所示，该修复方法可包括以下步骤S01至S04。
在步骤S01中，查找无法驱动子像素的显示元件2进行显示的驱动电路1，并将其作为问题驱动电路18。
在步骤S02中，选择与问题驱动电路18关联的修复线5作为目标修复线59，将目标修复线59所关联的除问题驱动电路18之外的正常工作的其它驱动电路1作为目标驱动电路19。
在步骤S03中，切断问题驱动电路18与其输出端11之间的连接。
在步骤S04中，使目标修复线59分别与问题驱动电路18的输 出端11和目标驱动电路19的输出端11连接，以使目标驱动电路19与原本由问题驱动电路18所驱动的子像素的显示元件2连接。
在一些实施方式中，在步骤S01中，通过检测，确定出存在故障而无法对相应的子像素的显示元件进行驱动的驱动电路1(即问题驱动电路18)。在步骤S03中，如图5所示，要切断问题驱动电路18与其输出端11之间的连接，以使其不再对相应的子像素的显示元件2造成影响。在步骤S04中，通过修复线5(目标修复线59)将另一驱动电路1(目标驱动电路19)的输出端11与问题驱动电路18的输出端11连接，从而使目标驱动电路19可用于驱动原本由问题驱动电路18所驱动的子像素的显示元件2进行显示，从而降低故障驱动电路对显示效果造成的影响。
应当理解，在步骤S03中，切断问题驱动电路18与其输出端11之间的连接实际上是切断问题驱动电路18的输出端11与其所驱动的子像素的显示元件2之间的连接，例如，如图2所示，在N1点处切断问题驱动电路18的输出端11与其所驱动的子像素的显示元件2之间的连接，然后在步骤S04中，使目标修复线59分别与问题驱动电路18的输出端11的N2点和目标驱动电路19的输出端11的N3点连接，这样，在步骤S04之后，原本由问题驱动电路18所驱动的子像素的显示元件2仅与目标驱动电路19连接而受其驱动。
还应当理解，在每条修复线5与两个驱动电路1关联的情况下，每条修复线5原本可能与其所关联的两个驱动电路1的输出端11(例如驱动电路18的输出端和驱动电路19的输出端)均绝缘，也可能只与其中一个驱动电路的输出端11(例如驱动电路19的输出端)绝缘，因此，在步骤S04中，使目标修复线59分别与问题驱动电路18的输出端11和目标驱动电路19的输出端11连接实际上是使修复线5与原本与其绝缘的驱动电路1的输出端11连接，例如，图2中N2点处原本已连接，而在步骤S04中在N3点处形成新连接。
此外，本公开的实施例中，步骤S03和S04间并无必然的先后顺序关系，二者中的任意一者都可先进行，也可二者同时进行，只要在步骤S03和S04后，目标驱动电路19能与原本由问题驱动电路18 驱动的子像素的显示元件2连接即可。
在一些实施方式中，步骤S03中切断问题驱动电路18与其输出端11之间的连接包括：通过激光切割方式切断问题驱动电路18与其输出端11之间的连接。
在一些实施方式中，步骤S04中使目标修复线59分别与问题驱动电路18的输出端11和目标驱动电路19的输出端11连接包括：通过激光短路方式使目标修复线59分别与问题驱动电路18的输出端和目标驱动电路19的输出端连接。
也就是说，步骤S03中的切断可以是通过激光进行的，如用激光切线设备进行切断(Cutting Open)，即用激光将问题驱动电路18与其输出端11之间的连接熔断；步骤S04中的连接也可以是用激光进行的，如用激光切线设备进行激光短路(Laser Short)，即用激光照射目标修复线59与驱动电路1的输出端11的投影交叠处，在目标修复线59与驱动电路1的输出端11之间的绝缘层的相应位置处形成过孔，并且例如使修复线59的相应部分熔融而流入所形成的过孔中，从而使目标修复线59与输出端11间导通。
当然，本公开的实施例中不仅限于采用激光切割方式进行切断，例如也可通过机械切割等其它方式进行切断，另外，也可通过钨粉沉积等其它方式使修复线5与驱动电路1的输出端11之间导通，此处不再赘述。
另外，本公开的实施例中的修复线、驱动电路的输出端均包括导体材料。
本公开的实施例还提供一种显示装置，其包括上述的显示基板。
也就是说，可将本公开的实施例的显示基板与其它部件组合，构成完成的显示装置，该显示装置可为电子纸、手机、平板电脑、电视机、显示器、笔记本电脑、数码相框、导航仪等具有显示功能的任何产品或部件。
可以理解的是，以上实施例及实施方式仅仅是为了说明本公开的技术方案的原理而采用的示例性实施例及实施方式，然而本公开并不局限于此。对于本领域内的普通技术人员而言，在不脱离本公开的 构思的情况下，可以做出各种变型和改进，这些变型和改进也视为落入本公开的保护范围。

Claims (17)

  1. 一种显示基板，包括配置为驱动各子像素中的显示元件进行显示的多个驱动电路，每个所述驱动电路配置为驱动至少一个子像素中的显示元件进行显示，每个所述驱动电路的输出端与其驱动的所述至少一个子像素中的显示元件通过具有开关元件的支路连接，所述显示基板还包括：
    至少一条修复线，每条所述修复线配置为与至少两个驱动电路关联，且初始状态下与所述至少两个驱动电路中的至少一个驱动电路的输出端断开，其中，
    每条所述修复线能够响应于所述至少两个驱动电路中的一个驱动电路故障与其所关联的所述至少两个驱动电路中的每个驱动电路的输出端连接。
  2. 根据权利要求1所述的显示基板，其中，
    所述多个驱动电路排成阵列，每行驱动电路通过一条栅线控制，每条所述修复线配置为与同一行的相邻的两个驱动电路关联，且初始状态下与所述相邻的两个驱动电路中的至少一个驱动电路的输出端断开，以及其中，
    每条所述修复线能够响应于所述相邻的两个驱动电路中的一个驱动电路故障与所述相邻的两个驱动电路的输出端均连接。
  3. 根据权利要求1所述的显示基板，其中，
    所述多个驱动电路排成阵列，每行驱动电路通过一条栅线控制，每行驱动电路中的任意两个驱动电路为一组进行分组，每条所述修复线配置为与一组驱动电路关联，且初始状态下与所述一组驱动电路中的至少一个驱动电路的输出端断开，以及其中，
    每条所述修复线能够响应于所述一组驱动电路中的一个驱动电路故障与所述一组驱动电路的输出端均连接。
  4. 根据权利要求1所述的显示基板，其中，
    所述多个驱动电路排成阵列，每行驱动电路通过一条栅线控制，每行驱动电路中的一个驱动电路配置为专用修复驱动电路，每条所述修复线配置为与所述专用修复驱动电路及与所述专用修复驱动电路同行的至少一个其他的驱动电路关联，且初始状态下与所述专用修复驱动电路及所述至少一个其他的驱动电路中的至少一者的输出端断开，以及其中，
    每条所述修复线能够响应于所述至少一个其他的驱动电路中的任意驱动电路故障与所述专用修复驱动电路及故障驱动电路的输出端均连接。
  5. 根据权利要求1所述的显示基板，其中，
    所述多个驱动电路排成阵列，每行驱动电路通过一条栅线控制，与每条所述修复线关联的驱动电路位于同一行，且与每条所述修复线关联的驱动电路所驱动的子像素中的显示元件显示相同的颜色，初始状态下，每条所述修复线与其所关联的驱动电路中的至少一个驱动电路的输出端断开，以及其中，
    每条所述修复线能够响应于与每条所述修复线关联的驱动电路中的任意驱动电路故障与其所关联的驱动电路中正常工作的驱动电路及故障驱动电路的输出端均连接。
  6. 根据权利要求1所述的显示基板，其中，
    每个所述驱动电路配置为驱动n个子像素中的显示元件进行显示，每个所述驱动电路的输出端与其所驱动的每个子像素中的显示元件通过具有开关元件的支路连接，n为大于或等于2的整数。
  7. 根据权利要求6所述的显示基板，其中，
    每个所述驱动电路的输出端通过各自具有开关元件的n条支路分别连接至其所驱动的n个子像素中的显示元件，所述n条支路中的每条支路的开关元件由单独的控制线控制。
  8. 根据权利要求7所述的显示基板，其中，
    所述多个驱动电路排成阵列，每行驱动电路通过一条栅线控制，同一行驱动电路的输出端所连接的支路中的开关元件可共享n条控制线，每个驱动电路的输出端所连接的n条支路中的开关元件中的每一个均由该n条控制线中的一条控制。
  9. 根据权利要求7所述的显示基板，其中，
    所述开关元件为开关晶体管，所述开关晶体管的第一极连接所述驱动电路的输出端，所述开关晶体管的第二极连接所述驱动电路所驱动的子像素中的显示元件，所述开关晶体管的栅极连接相应的所述控制线。
  10. 根据权利要求6所述的显示基板，其中，
    与每条所述修复线关联的所述至少两个驱动电路中，各驱动电路所驱动的子像素中的显示元件所显示的颜色分布相同。
  11. 根据权利要求1所述的显示基板，其中，
    每条所述修复线与其所关联的所述至少两个驱动电路的输出端之间通过绝缘层绝缘，且每条所述修复线在所述绝缘层上的投影与其所关联的所述至少两个驱动电路的输出端在所述绝缘层上的投影至少部分重叠。
  12. 根据权利要求1所述的显示基板，其中，
    每个所述驱动电路均与一条修复线关联。
  13. 根据权利要求1所述的显示基板，其中，
    所述显示基板为有机发光二极管阵列基板，所述驱动电路包括有机发光二极管驱动电路，所述显示元件包括有机发光二极管。
  14. 一种显示基板的修复方法，所述显示基板为权利要求1至13中任意一项所述的显示基板，所述显示基板的修复方法包括：
    查找故障的驱动电路，将其作为问题驱动电路；
    选择与所述问题驱动电路关联的修复线作为目标修复线，并将与所述目标修复线关联的除所述问题驱动电路之外的正常工作的其它驱动电路作为目标驱动电路；
    切断所述问题驱动电路与其输出端之间的连接；以及
    使所述目标修复线分别与所述问题驱动电路的输出端和所述目标驱动电路的输出端连接，以使所述目标驱动电路驱动原本由所述问题驱动电路所驱动的子像素中的显示元件进行显示。
  15. 根据权利要求14所述的显示基板的修复方法，其中，
    切断所述问题驱动电路与其输出端之间的连接包括：
    通过激光切割方式切断所述问题驱动电路与其输出端之间的连接。
  16. 根据权利要求14所述的显示基板的修复方法，其中，
    使所述目标修复线分别与所述问题驱动电路的输出端和所述目标驱动电路的输出端连接包括：
    通过激光短路方式使所述目标修复线与所述问题驱动电路的输出端和所述目标驱动电路的输出端连接。
  17. 一种显示装置，包括：
    权利要求1至13中任意一项所述的显示基板。
PCT/CN2019/087207 2018-05-17 2019-05-16 显示基板及其修复方法、显示装置 WO2019219057A1 (zh)

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