CN109064977A - The dim spot restorative procedure of AMOLED display panel and its dot structure - Google Patents

The dim spot restorative procedure of AMOLED display panel and its dot structure Download PDF

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Publication number
CN109064977A
CN109064977A CN201810802471.2A CN201810802471A CN109064977A CN 109064977 A CN109064977 A CN 109064977A CN 201810802471 A CN201810802471 A CN 201810802471A CN 109064977 A CN109064977 A CN 109064977A
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China
Prior art keywords
transistor
electrically connected
source electrode
driving
light emitting
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CN201810802471.2A
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陈彩琴
王少波
王伊
王一伊
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Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
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Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
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Priority to CN201810802471.2A priority Critical patent/CN109064977A/en
Publication of CN109064977A publication Critical patent/CN109064977A/en
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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]
    • G09G3/3225—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
    • G09G3/3233—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix with pixel circuitry controlling the current through the light-emitting element
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/10—OLED displays
    • H10K59/12—Active-matrix OLED [AMOLED] displays

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Electroluminescent Light Sources (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

The invention discloses a kind of AMOLED display panel and its dim spot restorative procedures of dot structure, the dot structure includes driving circuit and Organic Light Emitting Diode, the driving circuit is used to provide driving current so that the organic light-emitting diode to the Organic Light Emitting Diode, wherein, the dim spot restorative procedure includes: using laser cutting parameter, cut off the more than one electric connection node in the driving circuit, to prevent the driving circuit from providing driving current to the Organic Light Emitting Diode, so that the Organic Light Emitting Diode can not shine and form pixel dim spot.The present invention can reduce the consumption of the laser energy when carrying out dot structure dim spotization and repairing, and can also reduce repair time, improve working efficiency.

Description

The dim spot restorative procedure of AMOLED display panel and its dot structure
Technical field
The present invention relates to display technology fields, more particularly to the dim spot of a kind of AMOLED display panel and its dot structure Change restorative procedure.
Background technique
FPD is widely used in each electronic product such as TV, computer, tablet computer and smart phone, in electricity It is had a decisive role in sub-information industry.As the emerging representative of FPD, AMOLED (Active Matrix Organic Light Emitting Diode, active matrix organic light-emitting diode) display panel has from main light emission, visual angle It is wide, bright in luster, contrast is high, operating temperature range is wide and be suitable for Flexible Displays the advantages that, growth momentum is swift and violent in recent years.
Include criss-cross data line and scan line in AMOLED display panel, further includes being located at data line and scan line Intersection region dot structure, multiple dot structures in matrix array arrange.One typical AMOLED dot structure is by two A thin film transistor (TFT) (2T, T indicate Transistor), a storage capacitance (1C, C indicate Capacitor) and organic light emission two Pole pipe (OLED) is constituted, and is in 2T1C structure.Wherein, a transistor is as switching tube, for controlling data line to storage capacitance The access to charge；Another transistor is then used as driving tube, receives driving power (Vdd) and provides driving electricity for OLED Stream；Storage capacitance is then mainly used for maintaining the driving voltage for being applied to driving tube grid in OLED light emitting phase.It is aobvious in AMOLED Show in panel, generallys use low temperature polycrystalline silicon (Low Temperature Poly-silicon, LTPS) technology manufacture pixel knot Structure causes the driving for flowing through Organic Light Emitting Diode since the threshold voltage vt h uniformity of TFT is poor and there is drift Current unevenness is even and shines unstable.Driving current in order to solve the problems, such as Organic Light Emitting Diode is non-uniform, existing improvement Technical solution mostly used the quantity for increasing the thin film transistor (TFT) of single pixel inside configuration, storage capacitance, to improve electricity Uniformity forms mT+nC structure, such as 6 thin film transistor (TFT)s and 1 storage capacitance that have used in the art are formed The dot structure of 6T1C forms the dot structure of 6T2C using 6 thin film transistor (TFT)s and 2 storage capacitances, or using 7 thin Film transistor and 1 storage capacitance form the dot structure of 7T1C.
In the production process of AMOLED display panel, bright spot is bad be always restrict one of product yield it is crucial because Element.Bright spot is bad to refer to display panel when showing dark picture, and the dot structure of existing defects still shines and is formed as pixel Bright spot, it is one because of factors such as technique, environment that bright spot is bad, a kind of high bad, the undesirable presence of bright spot of incidence, directly The grade of product is reduced, when being more than certain amount, display panel will be directly scrapped, and while wasting manpower and material resources, also be mentioned High cost.
In the prior art, for there is the undesirable dot structure of bright spot, restorative procedure mainly applies laser energy will Organic Light Emitting Diode breakdown in dot structure, so that Organic Light Emitting Diode damages and can not shine to form pixel dim spot. Organic Light Emitting Diode area ratio shared in dot structure is larger, and existing restorative procedure is in breakdown organic light emission completely When diode, laser energy consumption it is larger and repair time it is also long.
Summary of the invention
In view of this, the present invention provides a kind of dim spot restorative procedure of the dot structure of AMOLED display panel, The consumption of the laser energy when carrying out dim spotization and repairing can be reduced, and repair time can also be reduced, improves work effect Rate.
In order to achieve the above purpose, present invention employs the following technical solutions:
A kind of dim spot restorative procedure of the dot structure of AMOLED display panel, the dot structure includes driving circuit And Organic Light Emitting Diode, the driving circuit are used to provide driving current so that described organic to the Organic Light Emitting Diode Lumination of light emitting diode, wherein the dim spot restorative procedure includes: to cut off the driving circuit using laser cutting parameter In more than one electric connection node, with prevent the driving circuit to the Organic Light Emitting Diode provide driving electricity Stream, so that the Organic Light Emitting Diode can not shine and form pixel dim spot.
Specifically, the driving circuit includes at least driving transistor, light emitting control transistor and storage capacitors, the drive The source electrode of dynamic transistor is electrically connected to power supply voltage signal, and drain electrode is electrically connected to the source electrode of the light emitting control transistor, Grid is electrically connected to first node；The source electrode of the light emitting control transistor is electrically connected to the leakage of the driving transistor Pole, drain electrode are electrically connected to the Organic Light Emitting Diode, and grid is electrically connected to luminous enable signal；The storage capacitors One end is electrically connected to the power supply voltage signal, and the other end is electrically connected to the first node；Wherein, the electric connection Node is selected from grid tie point, source electrode tie point and the drain junction and the light emitting control crystal of the driving transistor Grid tie point, source electrode tie point and the drain junction of pipe.
Specifically, the source electrode of the driving transistor is electrically connected to the power supply voltage signal by transmission transistor, The source electrode of the transmission transistor is electrically connected to the power supply voltage signal, and drain electrode is electrically connected to the driving transistor Source electrode, grid are electrically connected to the luminous enable signal；Wherein, the node that is electrically connected is selected from the transmission transistor Grid tie point, source electrode tie point and drain junction.
Specifically, the driving circuit further includes reset transistor, and the source electrode of the reset transistor is electrically connected to just Beginningization voltage signal, drain electrode are electrically connected to the first node, and grid is electrically connected to reset scanning signal；Wherein, described It is electrically connected grid tie point, source electrode tie point and drain junction that node is selected from the reset transistor.
Another aspect of the present invention is to provide a kind of AMOLED display panel, wherein wraps in the AMOLED display panel The dot structure of dim spot reparation is included, the dot structure includes driving circuit and Organic Light Emitting Diode, the driving circuit For providing driving current to the Organic Light Emitting Diode；It wherein, include that work is cut by laser in the driving circuit Skill cuts off the more than one circuit breakpoint to be formed, and the circuit breakpoint prevents the driving circuit to the organic light-emitting diodes Pipe provides driving current, so that the Organic Light Emitting Diode can not shine and form pixel dim spot.
Wherein, the driving circuit includes at least driving transistor, light emitting control transistor and storage capacitors, the driving The source electrode of transistor is electrically connected to power supply voltage signal, and drain electrode is electrically connected to the source electrode of the light emitting control transistor, grid Pole is electrically connected to first node；The source electrode of the light emitting control transistor is electrically connected to the drain electrode of the driving transistor, Drain electrode is electrically connected to the Organic Light Emitting Diode, and grid is electrically connected to luminous enable signal；The one of the storage capacitors End is electrically connected to the power supply voltage signal, and the other end is electrically connected to the first node；The formation of the circuit breakpoint Position is selected from grid tie point, source electrode tie point and the drain junction and the light emitting control crystal of the driving transistor Grid tie point, source electrode tie point and the drain junction of pipe.
Wherein, the source electrode of the driving transistor is electrically connected to the power supply voltage signal, institute by transmission transistor The source electrode for stating transmission transistor is electrically connected to the power supply voltage signal, and drain electrode is electrically connected to the source of the driving transistor Pole, grid are electrically connected to the luminous enable signal；The forming position of the circuit breakpoint is selected from the transmission transistor Grid tie point, source electrode tie point and drain junction.
Wherein, the driving circuit further includes reset transistor, and the source electrode of the reset transistor is electrically connected to initially Change voltage signal, drain electrode is electrically connected to the first node, and grid is electrically connected to reset scanning signal；The circuit breakpoint Forming position be selected from the reset transistor grid tie point, source electrode tie point and drain junction.
Wherein, the driving circuit further includes writing transistor, drift compensation transistor and initialization transistor, described to write The source electrode for entering transistor is electrically connected to data voltage signal, and drain electrode is electrically connected to the source electrode of the driving transistor, grid It is electrically connected to write-in scanning signal；The source electrode of the drift compensation transistor is electrically connected to the leakage of the driving transistor Pole, drain electrode are electrically connected to the first node, and grid is electrically connected to said write scanning signal；The initialization transistor Source electrode be electrically connected to the initialization voltage signal, drain electrode is electrically connected to the Organic Light Emitting Diode, and grid is electrical It is connected to said write scanning signal.
Wherein, in the driving circuit, the driving transistor, transmission transistor, resets crystal at light emitting control transistor Pipe, writing transistor, drift compensation transistor and initialization transistor are P-type TFT.
The dim spot restorative procedure of the AMOLED display panel and its dot structure that are provided in the embodiment of the present invention, using sharp Light cutting technique cuts off the electric connection node in driving circuit, and driving circuit is prevented to provide driving electricity to Organic Light Emitting Diode Stream, so that the Organic Light Emitting Diode can not shine and form pixel dim spot.Electric connection node in driving circuit is in picture Shared area ratio is comparatively small in plain structure, therefore, middle compared with the prior art to use laser breakdown organic light-emitting diodes Pipe repair mode, dim spot restorative procedure of the invention can reduce the consumption of laser energy, and when can also reduce reparation Between, improve working efficiency.
Detailed description of the invention
Fig. 1 is the circuit diagram of the dot structure of the AMOLED display panel in the embodiment of the present invention；
Fig. 2 is the layout structure schematic diagram of the driving circuit in the dot structure in the embodiment of the present invention；
Fig. 3 is the driving signal timing diagram of the dot structure such as Fig. 1；
Fig. 4 is in the dim spot restorative procedure of the dot structure of the AMOLED display panel provided in the embodiment of the present invention, The distribution schematic diagram of the electric connection node of dim spot reparation may be implemented；
The layout structure schematic diagram of driving circuit after dim spotization reparation of the Fig. 5 into Figure 16 embodiment of the present invention.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, with reference to the accompanying drawing to specific reality of the invention The mode of applying is described in detail.The example of these preferred embodiments is illustrated in the accompanying drawings.Shown in attached drawing and according to The embodiments of the present invention of attached drawing description are only exemplary, and the present invention is not limited to these embodiments.
Here, it should also be noted that, in order to avoid having obscured the present invention because of unnecessary details, in the accompanying drawings only Show with closely related structure and/or processing step according to the solution of the present invention, and be omitted little with relationship of the present invention Other details.
The invention proposes a kind of dim spot restorative procedures of the dot structure of AMOLED display panel, to solve existing skill The consumption of laser energy is larger in the dim spot restorative procedure of art and time for repairing also long problem.
As shown in Figure 1, the AMOLED display panel in the present embodiment includes multiple dot structures, each dot structure includes Driving circuit 10 and Organic Light Emitting Diode D, the driving circuit 10 are controlled by driving signal, are used for the organic light emission two Pole pipe D provides driving current IdSo that the Organic Light Emitting Diode D shines.
The driving circuit of the 7T1C structure type of driving circuit 10 in the present embodiment, that is, the driving circuit 10 includes 7 A thin film transistor (TFT) and 1 storage capacitors.It specifically, as depicted in figs. 1 and 2, include driving crystal in the driving circuit 10 Pipe T1, light emitting control transistor T6, transmission transistor T5, reset transistor T4, writing transistor T2, drift compensation transistor T3, initialization transistor T7 and storage capacitors C.
Fig. 2 is the 10 layout structure schematic diagram of driving circuit, and normally, the driving circuit 10 includes multiple structures Layer forms required particular circuit configurations by carrying out patterned process to the multiple structure sheaf.As shown in Fig. 2, described Driving circuit 10 includes the semiconductor material layer 100 set gradually, the first metal layer 200, second metal layer 300 and third gold Belong to the structure sheafs such as layer 400, transistor T1~T7, capacitor C and corresponding signal connecting line in the driving circuit 10 are all Pass through formed after patterned process to above structure sheaf.Wherein, it is provided between arbitrary neighborhood double-layer structure layer absolutely Edge layer (not shown), different double-layer structure layer are real by via hole 500 in the position of connection when being electrically connected Now it is electrically connected.It should be noted that, in order to clearly show the layout structure of circuit, it is brilliant to correspond to driving as in Fig. 2 The region of body pipe T1 shows the first metal layer positioned at the opposite lower section of second metal layer 300 from the visual angle of perspective using dotted line 200 and semiconductor material layer 100, and in the region, opposite second metal layer 300 and the first metal layer 200 constitute institute State the storage capacitors C in driving circuit 10.
Wherein, the source electrode of the driving transistor T1 is electrically connected to power supply voltage signal Vdd, drain and be electrically connected to institute The source electrode T6 of light emitting control transistor is stated, grid is electrically connected to first node A.Further, described to drive transistor T1's Source electrode is to be electrically connected to the power supply voltage signal V by the transmission transistor T5dd.Specifically, the transmission transistor The source electrode of T5 is electrically connected to the power supply voltage signal Vdd, drain and be electrically connected to the source electrode of the driving transistor T1, grid Pole is electrically connected to luminous enable signal EM.
Wherein, the source electrode of the light emitting control transistor T6 is electrically connected to the drain electrode of the driving transistor T1, drain electrode It is electrically connected to the anode of the Organic Light Emitting Diode D, grid is electrically connected to the luminous enable signal EM.
Wherein, one end of the storage capacitors C is electrically connected to the power supply voltage signal Vdd, the other end is electrically connected to The first node A.
Wherein, the source electrode of the reset transistor T4 is electrically connected to initialization voltage signal Vin, drain electrode is electrically connected to The first node A, grid, which is electrically connected to, resets scanning signal Sn-1。
Wherein, the source electrode of said write transistor T2 is electrically connected to data voltage signal Vdata, drain electrode is electrically connected to The source electrode of the driving transistor T1, grid are electrically connected to write-in scanning signal Sn。
Wherein, the source electrode of the drift compensation transistor T3 is electrically connected to the drain electrode of the driving transistor T1, drain electrode It is electrically connected to the first node A, grid is electrically connected to said write scanning signal Sn。
Wherein, the source electrode of the initialization transistor T7 is electrically connected to the initialization voltage signal Vin, drain electrode is electrically It is connected to the anode of the Organic Light Emitting Diode D, grid is electrically connected to said write scanning signal Sn。
In the present embodiment, refering to fig. 1 and Fig. 2, in the driving circuit 10, the driving transistor T1, light emitting control are brilliant Body pipe T6, transmission transistor T5, reset transistor T4, writing transistor T2, drift compensation transistor T3 and initial crystalline Pipe T7 is P-type TFT.The initialization voltage signal VinFor low level signal, said write scanning signal SnIt is to work as The corresponding line scan signals of preceding dot structure, the reset scanning signal Sn-1It is the corresponding lastrow of current dot structure Scanning signal.In other some embodiments, the transistor in the driving circuit 10 is also possible to using N-type film crystal Pipe.
In conjunction with Fig. 1 to Fig. 3, the driving process of the dot structure of AMOLED display panel as described above includes three ranks Section:
(1), first stage t1: scanning signal S is resettedn-1For low level, scanning signal S is writtennWith luminous enable signal EM It is high level.At this point, reset transistor T4 is connected, the current potential of first node A is reset to low level, so that driving transistor T1 It is reset on state；Remaining transistor (T2, T3, T5, T6, T7) is off state.
(2), second stage t2: write-in scanning signal SnFor low level, scanning signal S is resettedn-1With luminous enable signal EM It is high level.At this point, writing transistor T2, drift compensation transistor T3 and initialization transistor T7 conducting, reset crystal Pipe T4, transmission transistor T5 and light emitting control transistor T6 are off state.Transistor T1 is driven when due to t1 in the first stage It is reset on state, therefore, data voltage signal VdataPass sequentially through writing transistor T2, driving transistor T1, drift benefit It repays transistor T3 and is written to first node A, the current potential of first node A gradually rises until its current potential is Vdata-VthWhen, driving is brilliant Body pipe T1 cut-off, the current potential of first node A remain Vdata-Vth, wherein VthIt is the critical voltage for driving transistor T1.In addition, Since initialization transistor T7 is connected, the current potential of the anode of the Organic Light Emitting Diode D becomes initialization voltage signal Vin, by This can interfere current institute's driving signal to be formed to avoid driving signal before.
(3), phase III t3: the enable signal EM that shines is low level, resets scanning signal Sn-1With write-in scanning signal Sn It is high level.At this point, transmission transistor T5 and light emitting control transistor T6 conducting, writing transistor T2, drift compensation crystal Pipe T3, reset transistor T4 and initialization transistor T7 are off state.At this point, the source electrode and grid of driving transistor T1 Between potential difference Vgs=Vdd-(Vdata-Vth), driving transistor T1 conducting, power supply voltage signal VddPass sequentially through transmission crystal Pipe T5, driving transistor T1 and light emitting control transistor T6 are connected to Organic Light Emitting Diode D, are formed in the driving circuit The driving current I for driving Organic Light Emitting Diode D luminousd。
The dot structure of above AMOLED display panel is present embodiments provided when its generation bright spot is bad A kind of dim spot restorative procedure, this method is: applying laser cutting parameter, cuts off more than one in the driving circuit 10 It is electrically connected node, so that forming circuit breakpoint in the driving circuit 10, the circuit breakpoint prevents the driving circuit 10 Driving current I is provided to the Organic Light Emitting Diode Dd, so that the Organic Light Emitting Diode D can not shine and form pixel Dim spot, that is, the dot structure of dim spot reparation is formed in the AMOLED display panel.
As shown in figure 4, the electric connection node includes node P in dim spot restorative procedure provided in this embodiment01~ P12, specifically include: the source electrode tie point P of the driving transistor T101, drain junction P02With grid tie point P03；It is described The source electrode tie point P of light emitting control transistor T604, drain junction P05With grid tie point P06；The transmission transistor T5's Source electrode tie point P07, drain junction P08With grid tie point P09；The source electrode tie point P of the reset transistor T410, drain electrode Tie point P11With grid tie point P12.The above institute is cut off by applying laser cutting parameter refering to Fig. 4 and Fig. 5 to Figure 16 The electric connection node P stated01~P12In any one or more than one, in driving circuit 10 formed circuit breakpoint Q01~ Q12, circuit breakpoint Q01~Q12The driving circuit 10 can be prevented to provide driving current I to the Organic Light Emitting Diode Dd, So that the Organic Light Emitting Diode D can not shine and form pixel dim spot.
It should be noted that driving circuit shown in Fig. 5 to Figure 16 compared with driving circuit shown in Fig. 2, swashs in addition to applying Light cutting technique forms circuit breakpoint (Q01~Q12) except, remaining circuit structure is same as shown in Figure 2.In addition, Fig. 5 extremely schemes Circuit breakpoint Q in 1601~Q12It is and the electric connection section P in Fig. 401~P12It is corresponding, that is, to connect corresponding to each electrical property Meet section P01~P12, obtain the driving circuit of the dim spot reparation as shown in Fig. 5 to Figure 16 respectively after cutting forms circuit breakpoint. In other some embodiments, section P can also be electrically connected to two or more simultaneously01~P12It is cut, is obtained at this time The dot structure of the dim spot reparation obtained just includes the circuit breakpoint of corresponding number.
Further, in the driving circuit of dot structure, EM signal, Sn-1Signal, SnSignal and VinSignal is usually The two sides driving both ends of signal wire (simultaneously input signal), therefore, in the grid connection of the light emitting control transistor T6 of circuit diagram 4 Point P06, the layout structure figure of corresponding diagram 10, the tie point of the grid two sides of actual needs cutting light emitting control transistor T6；Together It manages, is the tie point of the grid two sides of actual needs cutting transmission transistor T5 in the scheme of Figure 13, is real in the scheme of Figure 16 Border needs to cut the tie point of the grid two sides of reset transistor T4.Further, need to cut grid two sides at these In the scheme of tie point, the reparation wire jumper around the grid can be increased, the signal wire of corresponding grid two sides is electrically connected again It is logical, so that signal restores the state of two sides driving, avoids there are dim spot reparation and there is no the row pixels of dim spot reparation There is biggish difference in driving signal.
Specifically, the electric connection node P01~P12Can be divided into two major classes (it should be noted that hereinafter with regard to It is electrically connected node P01~P12Statement, be also possible to using circuit breakpoint Q01~Q12It is stated, the electric connection after cutting Save P01~P12As corresponding circuit breakpoint Q01~Q12):
Refering to Fig. 4, the first kind is electrically connected the source electrode tie point P that node includes the driving transistor T101Connect with drain electrode Contact P02, the light emitting control transistor T6 source electrode tie point P04With drain junction P05, the transmission transistor T5 source Pole tie point P07With drain junction P08.When more than one of first kind electric connection node is cut off, correspond to picture above-mentioned The phase III t3 of the driving process of plain structure, power supply voltage signal VddIt can not be connected to Organic Light Emitting Diode D, so that described Organic Light Emitting Diode D can not shine and form pixel dim spot.
Refering to Fig. 4, the second class is electrically connected the grid tie point P that node includes the driving transistor T103, it is described shine Control the grid tie point P of transistor T606, the transmission transistor T5 grid tie point P09And the reset transistor The source electrode tie point P of T410, drain junction P11With grid tie point P12.More than one of second class electric connection node is cut When disconnected, the phase III t3 of the driving process corresponding to dot structure above-mentioned, the transmission transistor T5, driving transistor T1 It can not be connected at least one of light emitting control transistor T6, therefore power supply voltage signal VddAnd organic hair can not be connected to Optical diode D, so that the Organic Light Emitting Diode D can not shine and form pixel dim spot.It should be noted that the reset The source electrode tie point P of transistor T410, drain junction P11With grid tie point P12One of be cut off when, before corresponding to The current potential of the first stage t1 of the driving process for the dot structure stated, first node A can not be reset to low level, drive transistor T1 can not be reset to initial on state, and in the subsequent stage, driving transistor T1 remains off state.
The dim spot restorative procedure of AMOLED display panel and its dot structure that embodiment as above provides, cuts using laser The electric connection node in technique cutting driving circuit is cut, driving circuit is prevented to provide driving current to Organic Light Emitting Diode, So that the Organic Light Emitting Diode can not shine and form pixel dim spot.Since the electric connection node in driving circuit is in picture Shared area ratio is comparatively small in plain structure, therefore, middle compared with the prior art to use laser breakdown organic light-emitting diodes Pipe repair mode, dim spot restorative procedure of the invention can reduce the consumption of laser energy, and when can also reduce reparation Between, improve working efficiency.
In addition, as above the driving circuit in embodiment is illustrated by taking the driving circuit of 7T1C structure type as an example.? Under enlightenment of the invention, it can be readily appreciated that the dim spot restorative procedure of the dot structure in the present invention is also applied for other knots The driving circuit of configuration formula, such as the driving circuit of 5T1C, 6T1C and 6T2C relatively conventional in this field.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment Intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that There is also other identical elements in process, method, article or equipment including the element.
The above is only the specific embodiment of the application, it is noted that for the ordinary skill people of the art For member, under the premise of not departing from the application principle, several improvements and modifications can also be made, these improvements and modifications are also answered It is considered as the protection scope of the application.

Claims (10)

1. a kind of dim spot restorative procedure of the dot structure of AMOLED display panel, the dot structure include driving circuit and Organic Light Emitting Diode, the driving circuit are used to provide driving current so that organic hair to the Organic Light Emitting Diode Optical diode shines, which is characterized in that the dim spot restorative procedure includes: to cut off the driving using laser cutting parameter More than one electric connection node in circuit, to prevent the driving circuit from providing driving to the Organic Light Emitting Diode Electric current, so that the Organic Light Emitting Diode can not shine and form pixel dim spot.
2. dim spot restorative procedure according to claim 1, which is characterized in that it is brilliant that the driving circuit includes at least driving The source electrode of body pipe, light emitting control transistor and storage capacitors, the driving transistor is electrically connected to power supply voltage signal, drains It is electrically connected to the source electrode of the light emitting control transistor, grid is electrically connected to first node；The light emitting control transistor Source electrode be electrically connected to the drain electrode of the driving transistor, drain electrode is electrically connected to the Organic Light Emitting Diode, grid electricity Property is connected to luminous enable signal；One end of the storage capacitors is electrically connected to the power supply voltage signal, and the other end is electrical It is connected to the first node；
Wherein, the grid tie point, source electrode tie point and drain electrode connection for being electrically connected node and being selected from the driving transistor Grid tie point, source electrode tie point and the drain junction of point and the light emitting control transistor.
3. dim spot restorative procedure according to claim 2, which is characterized in that the source electrode of the driving transistor passes through biography Defeated electric transistor is connected to the power supply voltage signal, and the source electrode of the transmission transistor is electrically connected to the supply voltage Signal, drain electrode are electrically connected to the source electrode of the driving transistor, and grid is electrically connected to the luminous enable signal；
Wherein, the grid tie point, source electrode tie point and drain electrode connection for being electrically connected node and being selected from the transmission transistor Point.
4. dim spot restorative procedure according to claim 1 to 3, which is characterized in that the driving circuit further includes multiple Bit transistor, the source electrode of the reset transistor are electrically connected to initialization voltage signal, and drain electrode is electrically connected to described first Node, grid are electrically connected to reset scanning signal；
Wherein, the grid tie point, source electrode tie point and drain electrode connection for being electrically connected node and being selected from the reset transistor Point.
5. a kind of AMOLED display panel, which is characterized in that include the pixel of dim spot reparation in the AMOLED display panel Structure, the dot structure include driving circuit and Organic Light Emitting Diode, and the driving circuit is used for the organic light emission Diode provides driving current；Wherein, include in the driving circuit be cut by laser technique cut off to be formed one with On circuit breakpoint, the circuit breakpoint prevents the driving circuit from providing driving current to the Organic Light Emitting Diode, makes Obtaining the Organic Light Emitting Diode can not shine and form pixel dim spot.
6. AMOLED display panel according to claim 5, which is characterized in that it is brilliant that the driving circuit includes at least driving The source electrode of body pipe, light emitting control transistor and storage capacitors, the driving transistor is electrically connected to power supply voltage signal, drains It is electrically connected to the source electrode of the light emitting control transistor, grid is electrically connected to first node；The light emitting control transistor Source electrode be electrically connected to the drain electrode of the driving transistor, drain electrode is electrically connected to the Organic Light Emitting Diode, grid electricity Property is connected to luminous enable signal；One end of the storage capacitors is electrically connected to the power supply voltage signal, and the other end is electrical It is connected to the first node；
Wherein, the forming position of the circuit breakpoint is selected from grid tie point, source electrode tie point and the leakage of the driving transistor The grid tie point of pole tie point and the light emitting control transistor, source electrode tie point and drain junction.
7. AMOLED display panel according to claim 6, which is characterized in that the source electrode of the driving transistor passes through biography Defeated electric transistor is connected to the power supply voltage signal, and the source electrode of the transmission transistor is electrically connected to the supply voltage Signal, drain electrode are electrically connected to the source electrode of the driving transistor, and grid is electrically connected to the luminous enable signal；
Wherein, the forming position of the circuit breakpoint is selected from grid tie point, source electrode tie point and the leakage of the transmission transistor Pole tie point.
8. according to any AMOLED display panel of claim 5-7, which is characterized in that the driving circuit further includes multiple Bit transistor, the source electrode of the reset transistor are electrically connected to initialization voltage signal, and drain electrode is electrically connected to described first Node, grid are electrically connected to reset scanning signal；
Wherein, the forming position of the circuit breakpoint is selected from grid tie point, source electrode tie point and the leakage of the reset transistor Pole tie point.
9. AMOLED display panel according to claim 8, which is characterized in that the driving circuit further includes write-in crystal Pipe, drift compensation transistor and initialization transistor, the source electrode of said write transistor are electrically connected to data voltage signal, leak Pole is electrically connected to the source electrode of the driving transistor, and grid is electrically connected to write-in scanning signal；The drift compensation crystal The source electrode of pipe is electrically connected to the drain electrode of the driving transistor, and drain electrode is electrically connected to the first node, and grid electrically connects It is connected to said write scanning signal；The source electrode of the initialization transistor is electrically connected to the initialization voltage signal, drain electrode It is electrically connected to the Organic Light Emitting Diode, grid is electrically connected to said write scanning signal.
10. AMOLED display panel according to claim 9, which is characterized in that in the driving circuit, the driving is brilliant Body pipe, light emitting control transistor, transmission transistor, reset transistor, writing transistor, drift compensation transistor and initialization Transistor is P-type TFT.
CN201810802471.2A 2018-07-20 2018-07-20 The dim spot restorative procedure of AMOLED display panel and its dot structure Pending CN109064977A (en)

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